Rolls-Royce Archives
| Identifier | Entry | ||
| scan0001 | Specification sheet detailing the numerical particulars of an ignition coil system. | ||
| View original record | X8710 NUMERICAL PARTICULARS. OF IGNITION COIL SYSTEM. SYSTEM. Final Standard tall coil for RR. Battery Ignition (Stabalite base). 8.00 volts CORE. Length (inches) before turning over. 4.150" Diameter… | ||
| scan0002 | Specification sheet detailing the electrical characteristics of a ballast and primary coil system. | ||
| View original record | -2- contd BALLAST. Approx. resistance (ohms) (cold). .84 Approx. resistance (ohms). 1.35 (when carrying current of same heating value as working current at normal speed of timer and with primary gaps… | ||
| scan0003 | List of specifications and calculated values for a contact breaker, primary circuit, and core. | ||
| View original record | -3- CONTACT BREAKER. Normal speed (R.P.M.) 700 No. of breaks per revolution. 6 No. of breaks per second. 70 Platinum gaps set at - .020" Make ratio. r .50 Period (sec.) T' .0143 Time of make (sec.) t¹… | ||
| scan0004 | Specification sheet detailing the electrical characteristics of a condenser and transformer/coil system. | ||
| View original record | -4- CONDENSER. Capacity (microfarads) K .30 PRIMARY & CONDENSER. Period of oscillatory current (secs) T = 2π√(LK) .00162 Radio wave length (metres) vT 486000. PRIMARY, CONDENSER & BALLAST Decrement of… | ||
| scan0005 | List of formulas related to primary, condenser, secondary, and contact breaker components. | ||
| View original record | -5- Contd. PRIMARY, CONDENSER & SECONDARY. Approx. period of oscillatory current components in primary and secondary T"= 2π√((1-η)LK) (secs). Radio wave length (metres). VT" Damping coefficient. u =… | ||
| scan0006 | Calculations for the rise of current in the primary circuit of a standard tall coil for battery ignition. | ||
| View original record | X8710 30.4.24. R.R. BATTERY IGNITION. STANDARD TALL COIL FIGURES. A. RISE OF CURRENT IN PRIMARY CIRCUIT. E = 8.00 volts R = 2.53 ohms. L = .0096 henry. Then final current Co = E/R = 3.16 amperes and… | ||
| scan0007 | Calculation of the average and R.M.S. values of primary current. | ||
| View original record | -2- Contd. B. AVERAGE AND R.M.S. VALUES OF PRIMARY CURRENT. Number of breaks per second = 70 Make ratio r = .500 Then period T' = .0143 secs. Period of make t' = .500 x .0143 = .00714 second. Time of… | ||
| scan0008 | Page of calculations for quantity, energy, current, and magnetic field efficiency. | ||
| View original record | -3- Contd. The quantity per period = CT' = .01245 coulomb Energy per period given by battery = ECT' = .0995 Joule The mean squared current I = C₀ √r - 2 x s + 1/2 s y = 3.16 √.500 - .450 + .1295 =… | ||
| scan0009 | Data table showing variations with speed of a contact breaker. | ||
| View original record | VARIATIONS WITH SPEED OF CONTACT BREAKER SPEED FRACTION: 3/8 THROTTLE ON VS SPEED = 700 r.p.m. η EFFICIENCY = x² / 2(y-x) TABLE DATA: Headers: z | n | S | r/S | Col_5 | Col_6 | Col_7 | Col_8 | x | y |… | ||
| scan0010 | Table showing the effect of variation of make ratio (γ) for a standard battery ignition system. | ||
| View original record | R.R. STANDARD BATTERY IGNITION. TABLE SHOWING THE EFFECT OF VARIATION OF MAKE RATIO (γ) S = 2653 L = .0096 HENRY C_o = 3.16 AMPERE T' = .0143 SEC E = 8 VOLTS γ | .4343γ/S + | .4343γ/S - | r/S |… | ||
| scan0011 | Secret memorandum discussing modifications to the ignition coil's position, mounting, and materials. | ||
| View original record | X8710 TO BY: FROM E. SECRET. E1/M7.10.24. Copy to - O.J. [Struck through] Copy to - MPG. [Struck through] Copy to - HS. E. A. C. 11. IGNITION COIL. X8710 As previously mentioned we have moved the… | ||
| scan0012 | Alternative scheme to insulate the ignition coil from engine heat, listing required parts. | ||
| View original record | [Stamped and crossed out text] To RHC. C. EFC. C.c. BY/SE [End of stamped and crossed out text] BY/RD3/ML3.11.24. [Handwritten] X8710 X.8710 - IGNITION COIL - E.A.C.11. Referring to LeC.1936 which… | ||
| scan0013 | Production test procedure for EAC ignition coils. | ||
| View original record | X8710 16.1.25. X.8781cl. PRODUCTION TEST OF EAC. IGNITION COILS. X8710 (1) Continuity of primary and secondary circuits shall be tested by applying an approx. A.C. voltage of 200 to the secondary,… | ||
| scan0014 | Page 2 of a distributor testing procedure, detailing specific tests, running conditions, and current limits. | ||
| View original record | -2- Contd. ammeter and contact breaker, just permits the passage of 1.00 ampere when the contacts are closed. The make ratio of the distributor can then be set by adjusting and locking the platinum… | ||
| scan0015 | Suggestion to experimentally produce an EAC coil with a Redmanol case due to cracking issues with the Stabalite cases. | ||
| View original record | To By To: BY/RD. from EFC. X8710, EFC4/T24.1.25. X.4079c. EAC. COIL IN REDMANOL CASE. X8710. We think it would be advisable to have one of these coils experimentally instructed with Redmanol case,… | ||
| scan0016 | Requesting the experimental construction of three EAC coils in Redmanol cases. | ||
| View original record | X.8710 To BY/RD. from EFC. EFC3/T25.2.25. X.8710. EAC. COILS IN REDMANOL CASES. Following our conversation, would you please arrange for three such coils to be instructed experimentally. EFC. 1804… | ||
| scan0017 | Instructions for modifying the Ignition Coil X.8710 for the 20 HP & E.A.C. Chassis. | ||
| View original record | V8/10 C. EFC. BY/RD4/ML2.3.25. RE 20 H.P. & E.A.C. CHASSIS - IGNITION COIL. X.8710. Will you please put in hand 3 Ignition Coils suitable for the above, the actual windings being as at present… | ||
| scan0018 | Proposal to standardize the coil on the 'G' Series 20 HP by using a single EAC coil for manufacturing simplicity. | ||
| View original record | Secret. Y8710 Hs. BY7/H. 12. 3. 25. "G" SERIES 20 HP. It appears to us reasonable on "G" Series 20 HP. to fit EAC. ~~column~~ coil so that we only have one coil in manufacture. It is very much easier… | ||
| scan0019 | List of coils fitted to various chassis. | ||
| View original record | XS710 1.4.25. COILS ON VARIOUS CHASSIS. Chassis. Coil. 49-GB. TR.5 5-EX. 4-GII. TR.3 (upon return of 4-GII) 6-GII. TR.2. 7-GII. TN.1. GF.68. TR.1. 44-PK. EAC.E. 46-PK. EAC.F. 93-NK. EAC.E. 98-NK.… | ||
| scan0020 | Instruction memo about the supply of three EAC Type Coils with material and component updates. | ||
| View original record | ROLLS-ROYCE, LTD. INSTRUCTIONS. X. 8710. RR 288 (150 BKS.) (SHS7.29-6-20.) MP 22435B To: EFC Date: 4 - 5 - 19 25 Customer's No. Order No. I have been requested to supply you with three EAC Type Coils.… | ||
| scan0021 | Experiments to improve ignition coils by reducing energy output and investigating a related patent. | ||
| View original record | X8710 To R. from EFC. c. CJ. EY. EFC2/T20.5.25. + RE IGNITION COILS. X.4079 X.4353/4 X.8710. Reference your RL/M11.5.25, now that our ignition coils are consistently satisfactory from the point of… | ||
| scan0022 | Whether to experiment with a new design for a closed circuit, iron core ignition coil. | ||
| View original record | Contd. -2- EFC2/T20.5.25. closed circuit type of coil somewhere, having observed sparks of greater utility (capability of overcoming leaky gaps) from such coils, though he does not express a definite… | ||
| scan0023 | Test report confirming EAC type tall coils in Redmanol cases meet production specifications. | ||
| View original record | RR 232(150 BKS.)(SH57.29-6-20.) MP 224358 X.8710. ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.B. Order No. WB18 Customer's No. X 8711 Date 8/4 1925 EAC type tall coils in Redmanol cases. These coils NOS,… | ||
| scan0024 | Fitting of three new EAC type coils in Redmanol cases to specific chassis. | ||
| View original record | To RHC. from EFC. X8710 EFC1/T9.6.25. X.8710. EAC. TYPE COILS IN REDMANOL CASES. Herewith we hand to you three of the above coils designated PR1, PR2 and PR3. Would you kindly have these coils fitted… | ||
| scan0025 | Test results log for tall ignition coils, detailing performance metrics. | ||
| View original record | V8710 X.3604cl. R.R. TALL IGNITION COILS. X.4596. X.871D. X.4655. | Date. | Coil number. | Secondary continuity. | Secondary Milliamps. | O.C.S. Test. | Running current (amps). | Remarks. |… | ||
| scan0026 | Query from Mr. Royce about the round EAC type coil for the 20 HP model. | ||
| View original record | To BY. from EFC. c. BY/RD. X8710 EFC11/T11.9.25. X.8710. ROUND EAC. TYPE COIL FOR 20 HP. During my recent visit to Mr. Royce he enquired as to the position of the round type EAC. coil for the 20 HP. I… | ||
| scan0027 | The testing and manufacturing status of Redmanol encased battery ignition coils. | ||
| View original record | To R & E. from EFC. c. CJ. Wor. c. By. RG. c. Da. Wd. X 8710 EFC2/T23.9.25. X.4079b - REDMANOL ENCASED BATTERY IGNITION COILS. X.8711. X.4653 Refs. of previous reports :- EFC1/T14.10.24. EFC3/T4.5.25.… | ||
| scan0028 | Comparative costs and quality of Redmanol and stabalite for coil cases. | ||
| View original record | Contd. -2- EFC2/T23.9.25. take place perfectly; the material of the moulded piece being therefore dielectrically and mechanically unsound. Redmanol coil cases could be made here at a much less cost… | ||
| scan0029 | Standardisation of a round base EAC type ignition coil for 20 HP chassis. | ||
| View original record | RR 785 (10M) (SL391 2-11-23) MP 281297 X 8710 COMPLETED 6.10.25. STANDARDISATION of CHASSIS PARTS. Date 15.9.25. Description of Parts. ROUND BASE EAC. TYPE IGNITION COIL FOR 20 HP. Origin. Unification… | ||
| scan0030 | The mileage testing of Redmanol encased battery ignition coils. | ||
| View original record | Expl. Report. X.4079 Ref: EFC2/T4.3.26. X8710 To R. from EFC. c. CJ. E. Da. c. Wor. By. Rg. c. EP. BATTERY IGNITION - REDMANOL ENCASED COILS. X4653 My assistant reports as follows :- "Two standard… | ||
| scan0031 | Progress report on tests of tungsten contact points and coils with different windings. | ||
| View original record | Contd. -2- EFC2/T4.3.26. V2854 Tests on tungsten contact points are proceeding (with coils with standard windings) independently of the tests of coils with finer primaries, as it may be assumed that… | ||
| scan0032 | High-tension test report comparing the dielectric strength of coil case materials: redmanol, stabalite, and mouldensite. | ||
| View original record | EFC. WB.92. X2099 X8710 7.6.26. H.T. TEST OF COIL CASE MATERIAL. X.2494. X.4079. We have tested on the H.T. transformer two coil cases side by side, one of redmanol and the other of stabalite… | ||
| scan0033 | Supply and comparison of Redmanol and stabalite coil cases. | ||
| View original record | To EFC. from Mr.Brock. Herewith six Redmanol coil cases as per your request. If you compare the insulating properties of this material with cases of stabalite will you please remember the bore of the… | ||
| scan0034 | Changes to ignition components on chassis 89-GIII and requesting a report on chassis 10-EX. | ||
| View original record | To E. from EFC. X8710 EFC3/T8.9.26. X2894 X4653 X8710 In accordance with a scheme which we have arranged of systematically trying the eight combinations of (a) Standard or finer primary ignition coil,… | ||
| scan0035 | Extract detailing tests of insulating materials for coil cases. | ||
| View original record | X.40796. X8710 To R. Extract from EFCl/T16.9.26. (For original see X.3513.) H.T.D.C. TESTS OF INSULATING MATERIALS. In the case of the coil cases, the idea was to develop a test which could be applied… | ||
| scan0036 | Test results comparing the electrical properties of seven Redmanol coil cases against one Stabalite case at varying temperatures. | ||
| View original record | -2- more than the stabalite ones which have been replaced. The results of the tests are contained in the following tables and notes :- Results for coil cases :- Tin-foil electrodes were placed on the… | ||
| scan0037 | Test results and general inferences from testing various coil cases under different temperature conditions. | ||
| View original record | -3- drawn between readings indicates that the case was allowed to rest cool down in the interval. Otherwise it was maintained hot for about an hour before repeating the test :- Coil cases. | 1 | 2 | 3… | ||
| scan0038 | Testing different grades of sheet material and faulty short type ignition coils. | ||
| View original record | -4- Of the sheet material, the brown grades in every case were bad, while the best results were obtained with the yellow linen-based material and the Mosses & Mitchell grade "O" after heating and… | ||
| scan0039 | Performance and potential destruction of platinum points in an ignition system. | ||
| View original record | To EFC. from R. x8710 R4/M18.9.26. RE PLATINUM POINTS. X.4653. X.4652. X.8710. Naturally running the engine at slow speed the current at the time of breaking the circuit on the battery ignition must… | ||
| scan0040 | The mileage test results for Redmanol encased ignition coils without failure. | ||
| View original record | X8710 EFC3/T25.9.26. To R. from EFC. c. BJ. E. c. De. By. c. Wor. X.4079c - REDMANOL ENCASED IGNITION COILS. X8710 X.4653 Redmanol encased coils have now completed the following mileages without… | ||
| scan0041 | Production test procedure for an 18,000 turn taller type ignition coil in a Reimanol case. | ||
| View original record | X8710 15.10.26. X.8781cl. X.5781cl. PRODUCTION TEST OF IGNITION COILS. X.8710. X.5710. 18,000 TURN TALLER TYPE COIL IN REIMANOL CASE. (1) Continuity of primary and secondary circuits shall be tested… | ||
| scan0042 | Test procedures for a distributor and ignition coil, detailing current, voltage, and spark gap specifications. | ||
| View original record | -2- Contd. in circuit with the 12 volt battery, ammeter, and contact breaker, just permits the passage of 1.00 ampere when the contacts are closed. The make ratio of the distributor can then be set by… | ||
| scan0043 | Electrical experimental record sheet for the testing of an E.A.C. coil in a redmanol case (NO PRI). | ||
| View original record | X8710 ELECTRICAL EXPERIMENTAL RECORD SHEETS. E.A.C coil in redmanol case NO PRI X. No:- 8711 Date on. | Location. | Date off. | REMARKS. | Miles reading Start. | Miles reading Finish. | Miles covered.… | ||
| scan0044 | Electrical experimental record sheet for an E.A.C. coil in a Redmanol case, part number NO PR2. | ||
| View original record | X8710 ELECTRICAL EXPERIMENTAL RECORD SHEETS. X. No:- 8711 E.A.C. coil in Redmanol case NO PR2 [Column Headers] Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading… | ||
| scan0045 | Electrical experimental record sheet for an E.A.C. coil in a Redmanol case, number PR3. | ||
| View original record | X. No:- 8711 X8710 ELECTRICAL EXPERIMENTAL RECORD SHEETS. E.A.C. coil in Redmanol case NO PR3 Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles… | ||
| scan0046 | Requesting the production of a finer primary coil (GP.11) for the 2nd EAC.7 chassis, designated 15-EX. | ||
| View original record | X8710 To RHC. from EFC. EFC/T30.11.26. FINER PRIMARY COILS. For the 2nd EAC.7 chassis, which presumably will be called 15-EX, we should be pleased if you would have made up a further finer primary… | ||
| scan0047 | The development of a production test for ignition coil cases made from Redmanol material. | ||
| View original record | X8710 EFC. PC.132. April 13th, 1927. DEVELOPMENT OF PRODUCTION TEST FOR REDMANOL IGNITION COIL CASES. For the purpose of evolving a specification of test for ignition coil cases produced in Redmanol… | ||
| scan0048 | Test results and conclusions on resistance changes with temperature for various coil cases. | ||
| View original record | -2- Contd. corresponding leakage current from 20 micro-amperes up to the full scale deflection of 960 microamperes. With the first coil case, readings were taken at 20ºC, 40ºC, 60ºC, 70ºC, 80ºC, 90ºC… | ||
| scan0049 | Letter regarding the return of six scratched redmanol ignition coil cases and proposing a revised testing schedule. | ||
| View original record | To SPT/Mr. Brock. c. EY. Wd. X4079 X8710 EFC4/T26.4.27. IGNITION COIL CASES. Herewith we return to you the six redmanol coil cases which we had for insulation tests. We are quite aware of the fact… | ||
| scan0050 | Regular electrical testing of 10% of ignition coil cases to check insulation quality. | ||
| View original record | X4079 X8710 STU. S.T./Mr.Brock. BY/RM. EPO. BY25/H. 28.4.27. IGNITION COIL CASES. ************************* Now that EPO. is in a position to try out electrically the insulation of the coil cases, I… | ||
| scan0051 | High tension D.C. testing of Redmanol coil cases at temperatures up to 100°C, proposing a specification for insulation tests. | ||
| View original record | X4077 Y8710 To R. from EFC. c. BJ. PN. c.Wor. BY. c. E. DA. c. Mr. Brock. EFCl/T4.5.27. HIGH TENSION D.C. TESTING OF REDMANOL COIL CASES AT TEMPERATURES UP TO 100°C. Y3173 X4079 In regard to our… | ||
| scan0052 | Report page detailing electrical insulation test procedures and results for condensers and coils, including measurement tables. | ||
| View original record | -2- At 15º 70 megohms. At 21º 53 megohms. " 16º 67 " " 22º 50 " " 17º 64 " " 23º 47 " " 18º 61 " " 24º 45 " " 19º 59 " " 25º 42 " " 20º 56 " (4) The additional condenser (external to the rectifying… | ||
| scan0053 | Data table showing results from electrical leakage, voltage, and ratio tests on components under different conditions. | ||
| View original record | Contd. -3- Contd. | Case. | Prodn. test. | Leakage Mic.amps. | Peak Volts. | Ratio Megohms. | |---|---|---|---|---| | A | 1 | 64.0 | 7,390 | 115 at 17°C. | | | 2 | 832 | 1,925 | 2.32 | | B | 1 | 80.0… | ||
| scan0054 | Production test results for Redmand Coil Cases. | ||
| View original record | RR 238 (150 BKS.) (SH57.29-6-20.) MP 224358 X8710 ROLLS-ROYCE LTD. INSTRUCTIONS. May. 5th 1927 To EFC Order No. PC 135 Customer's No. X 4079 Production Test of Redmand Coil Cases. Following are the… | ||
| scan0055 | Instructions for an experiment on a newly designed coil with less iron in the magnetic circuit. | ||
| View original record | RR 238 (150 BKS.) (DB 481-8-12-24) MP 306975 X8710. ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.7.b. Order No.: WC26 Customer's No.: Coil made up without the ends of the iron core bent over i.e with less… | ||
| scan0056 | Test results for a coil's primary and secondary windings, including resistance, impedance, and inductance. | ||
| View original record | RR 238 (150 BKS.) (DB 451-8.12.24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. (2) Customer's No. 19 Primary Resistance (18°C) = 2.35 ohms. Impedance (50~) = 3.76 ohms Inductance = .0092… | ||
| scan0057 | Re-testing of Ignition Coil No. 4554 on an engine after it passed bench tests. | ||
| View original record | To Hs/ACL. from EFC. X8710 EFC3/T20.5.27. IGNITION COIL No.4554. This coil was stated to be faulty by the Repair Dept but found quite O.K. on our bench tests. We should be pleased if you would run… | ||
| scan0058 | Delivery schedule of coil cases required for insulation testing. | ||
| View original record | To SFT/Mr.Brock. X 8710 EFCL/T27.5.27. So far we have only had one lot of coil cases for insulation test. I understood you decided it would suit your convenience better if you sent us a few each week,… | ||
| scan0059 | Specification for insulation testing of Redmanol coil cases at various temperatures. | ||
| View original record | X.3513. X.8710. X8710 EFC/T8.6.27. SPECIFICATION OF INSULATION TEST AT TEMPERATURE OF REDMANOL COIL CASES. With the six-volt RR. trembler coil No.6162 operating on a voltage of 6.0 volts and with the… | ||
| scan0060 | Leakage and insulation resistance test results for four coil cases. | ||
| View original record | To Sft/Mr. Brock. X4079 X8710 EFCA/T10.6.27. X4079 COIL CASES. Herewith we return to you the fourth of the four coil cases recently received from you for leakage tests. The three already returned to… | ||
| scan0061 | The results of an insulation test for a coil case after re-baking. | ||
| View original record | X4079 X8710 To SFT/Mr. Brock. EFC/CAPL/T18.6.27. X.4079. INSULATION TEST OF COIL CASES. We herewith return to you the coil case submitted by you for a second test after re-baking. We find find that… | ||
| scan0062 | Tested Redmanol coil cases failing requirements and the recommendation for the batch to be re-baked. | ||
| View original record | To Sft/Mr. Brock. c. BY. X4079 X8710 EFC1/T5.7.27. RE COIL CASES. X.4079 We have duly tested the three Redmanol coil cases representing 10% of last week's production. We find all these to be low on… | ||
| scan0063 | Chasing an overdue batch of coil cases for testing. | ||
| View original record | X4079 X8710 To Mr. Brock. EFC10/T23.8.27. COIL CASES. My assistant reminds me that we have not yet had for test the batch of coil cases due last week. EFC. | ||
| scan0064 | Confirming the return of two redmanol coil cases after successful insulation tests. | ||
| View original record | To Mr. Brock. c. BY. X4077 (crossed out) X8710 EFC2/T8.9.27. REDMANOL COIL CASES. Herewith we return to you the two redmanol coil cases received for insulation tests. These are quite O.K. EFC. | ||
| scan0065 | The failure analysis of an E.J.B's coil after a 9600-mile bench test and the performance of its tungsten contact points. | ||
| View original record | RR 238 (150 BKS.) (DB 451-B-12 24) MP 306975 X.8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.7.b. Order No. WC40 Customer's No. X.8710 19-10-1927 E.J.B's coil (LI) with reduced iron core This coil ran for… | ||
| scan0066 | Instructions for testing a coil with 1/3 less iron in its core and a 50% longer ballast. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 X.8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To E7C. Order No. Customer's No. X.8710 Date 20-10-1927 Herewith the coil West brought along to me the other day. You… | ||
| scan0067 | Bench test results for an old standard coil and double ballast ignition system. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12 24) MP 306975 X.8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.7.b. Order No. WC42 Customer's No. X 8710 Date 21-10-1927 Old Standard coil and double ballast. Tests have been… | ||
| scan0068 | Technical memo discussing improvements to the battery ignition system, including contacts, distributor tracking, and coil design. | ||
| View original record | To EPC. from R. c. BJ. BY. Hs. X8710 R2/M9.12.27. BATTERY IGNITION. X.8692. X.8690. X.8710. X.4654. X.2894. Although the minor improvements after the scrubbing contacts are not of very great… | ||
| scan0069 | To Mr. Brock regarding the return of a faulty ignition coil for repair. | ||
| View original record | To Mr. Brock. X8710 EFC5/T15.12.27. Herewith we return to you the standard ignition coil which is the one you supplied to us for use on our battery ignition contact point tests. This coil has, as you… | ||
| scan0070 | Technical discussion on the design principles and advantages of an ignition coil with a nearly closed magnetic circuit. | ||
| View original record | To R. from EFC. c. BJ. BY. X8710 EFC4/T19.12.27. X4654 X8711 IGNITION COIL WITH NEARLY CLOSED MAGNETIC CIRCUIT. technical No great advantage is shown on test, neither does there appear to be any… | ||
| scan0071 | Technical description of coil construction and insulation. | ||
| View original record | -2- Contd. current. The construction of the coil with the inside secondary and outside primary is such that the circuit is largely closed by the magnetic casing into which the coil is finally sealed;… | ||
| scan0072 | Summary of the advantages of American Central H.T. coils, detailing construction, performance, and issues with corrosion. | ||
| View original record | EFC. WC.60. X8710 xXX 7.1.28. AMERICAN CENTRAL H.T. COILS+ We give below a summary of what we consider to be the chief advantages of these coils. (1) Easier and cheaper to manufacture as the case need… | ||
| scan0073 | Proposal to test a new English-made, paraffin wax-impregnated paper for use in ignition coils and condensers. | ||
| View original record | X8710 BY/RD. c .EFC. BY10/G11.1.28. IGNITION COIL AND CONDENSER. X.8700/10. We have obtained samples of an English made paper impregnated with paraffin wax, and I would like to have EFC's views on the… | ||
| scan0074 | Investigation report into the failure of two coils, numbers 4405 and T145X, from the repair department. | ||
| View original record | To BY. from EFC c. Mr. Brock. c. BY/RD. X.8710 EFC2/T4.2.28. COILS NOS. 4405 and T145X. EX REPAIR DEPT. X8783L We have duly tested and afterwards unwound these coils for examination. Both coils showed… | ||
| scan0075 | Investigation into overheating and charring failures of finer primary coils. | ||
| View original record | -2- Contd. X.4653 In the case of the finer primary coils, we have had one or two cases of secondary weakness, due to charring, presumably as a result of overheating. We are investigating the… | ||
| scan0076 | Issues of overheating and wet varnish in ignition coils and proposing solutions involving ballast resistances. | ||
| View original record | X8710 To EFC. BY/RD5/ML1 10.2.28. IGNITION COILS - EFC2/T.4.2.28. X.8710 X4653 COIL 4405.- The finding of wet varnish in this coil is I think no isolated case, it is extremely difficult, nearly… | ||
| scan0077 | Test procedure for the comparison of experimental coils. | ||
| View original record | X8710 15.2.28. COMPARISON OF EXPERIMENTAL COILS. X.8710 (1) First ascertain that the coil is in O.K. condition as regards continuity of windings. (2) Make suitable measurements of the resistances and… | ||
| scan0078 | Continued list of testing procedures for an H.T. supply coil. | ||
| View original record | -2- Contd. (7) The coil H.T. supply shall now be connected to a standard leaky gap (as specified for magneto work) and the speed limits for satisfactory operation noted (the distributor make ratio as… | ||
| scan0079 | Testing and potential adoption of a new British-sourced insulating paper for ignition coils and condensers. | ||
| View original record | To Roy. from EFC. c. By. X8710 EFC3/T9.5.28. INSULATING PAPERS FOR IGNITION COILS & CONDENSERS. Y110-1 Sample papers have been submitted to us by ROY., obtained from a British source, viz.Messrs.… | ||
| scan0080 | Temperature leakage tests conducted on three different types of insulating papers. | ||
| View original record | X8710 EFC. PD24. May 8th 1928. TEMPERATURE LEAKAGE TESTS ON INSULATING PAPERS. Tests have been made on some specimens of insulating papers; making a comparison between them with respect to leakage at… | ||
| scan0081 | Assessment of a new, crisper material for use in coils and condensers, comparing it to the standard flexible material. | ||
| View original record | -2- Contd. It has the appearance of being drier, more crisp, and more likely to crack with handling than the standard material, which seems more flexible. It is the opinion of production (Mr. Brock),… | ||
| scan0082 | Specifications for a standard finer primary coil wound in the production department. | ||
| View original record | X8710 12.5.28. STANDARD FINER PRIMARY COIL WOUND IN PRODUCTION DEPT. UNDER EFC'S SUPERVISION. Primary - resistance 2.26 ohms at 16°C. impedance (50~) 5.48 ohms. reactance 5.01 ohms. inductance .0164… | ||
| scan0083 | Use of ballast resistance with coarser primary winding ignition coils. | ||
| View original record | X8710 To EY/RD. from EFC. EFC3/T16.5.28. IGNITION COILS. Answering your EY/RD1/ML16.5.28, we are not in a position to recommend the use of the double value ballast resistance with the coarser primary… | ||
| scan0084 | Primary winding and ballast resistance for ignition coils. | ||
| View original record | Hs V8710 To EFC. BY/RD1/MLJ16.5.28. RECEIVED MAY 16 1928 IGNITION COILS. In reverting to 300 turns of 22 S.W.G. enamelled and S.C.C. for the primary winding the question of Ballast Resistance… | ||
| scan0085 | To Mr. Brock regarding the addition of a secondary winding of 18000 turns to a standard coil. | ||
| View original record | To Mr. Brock. X8710 EFC3/T1 8.5.28. We hand you herewith an old standard coil wound with primary only. Will you please have the secondary winding wound on 18000 turns, this being the figure for the… | ||
| scan0086 | Ignition coil failures, referencing specific reports and suggesting design changes and further experiments. | ||
| View original record | BY. from EFC. c. BY/RD c. Mr. Brock. X8710 EFC4/T18.5.28. IGNITION COILS. X4079 Please find attached copy of my assistant's report WC.107 which is self-explanatory, but we might add a remark to the… | ||
| scan0087 | The failure of an old ignition coil, tracing the fault to varnish on the secondary winding. | ||
| View original record | EFC. WC.107. 13.5.28. IGNITION COILS. We have had a failure recently on one of the old std. coils PR2 (22 SWG. primary). This coil has done a considerable mileage on a chassis and has also been used… | ||
| scan0088 | Technical note detailing H.T. tracking faults within ignition coil cases due to moisture. | ||
| View original record | EFC. WD.108. 18.5.28. IGNITION COIL CASES. We have had one or two cases lately where H.T. tracking has occurred inside the Redmanol coil case, presumably due to moisture collecting in the first… | ||
| scan0089 | Diagram illustrating the path of discharge along a surface within a component. | ||
| View original record | WE.108. PATH OF DISCHARGE. | ||
| scan0090 | Summary of the advantages of American Central H.T. coils. | ||
| View original record | EFC. WC.60. xXx 7.1.28. AMERICAN CENTRAL H.T. COILS+ We give below a summary of what we consider to be the chief advantages of these coils. (1) Easier and cheaper to manufacture as the case need not… | ||
| scan0091 | Comparison test procedure for experimental coils. | ||
| View original record | By IRD By. X8710 18.5.28. COMPARISON OF EXPERIMENTAL COILS.X.8710. (1) First ascertain that the coil is in O.K. condition as regards continuity of windings. (2) Make suitable measurements of the… | ||
| scan0092 | List of test procedures for an ignition coil. | ||
| View original record | -2- Contd. (6) With the make ratio of the distributor altered to .55 the coil shall be run for 5 hours at a voltage of 17.5 under similar standard conditions as before, and the secondary resistance… | ||
| scan0093 | Specifications and testing requirements for two new ignition coil designs. | ||
| View original record | Mr RHG C. EFC. C. Mr Brook X8710 BY/RD3/ML21.5.28. IGNITION COILS - SEC:8140 Please receive herewith blueprints of D.71628/9 representing two ignition coils to enable the following tests to be made,… | ||
| scan0094 | Instruction sheet for packing two special coils (X & Y) for testing purposes. | ||
| View original record | RR 238 (180 BKS.) (SH57.29-5-28.) MP 224358 V8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To: Mr Coverley 6 - 6- 19.28 Order No. Customer's No. Special coils X & Y packed out to case. Herewith 2 Coils. 1 off D… | ||
| scan0095 | Proposal to test an ignition coil with a reverse winding construction, listing required blueprints and materials. | ||
| View original record | X8710 BY/RD4/ML.7.6.28. C. EFC. IGNITION COIL - SEC:8140. X.8710 R2/M.9.12.27. We propose to test out a coil having the reverse order of construction to our standard, i.e. secondary winding on the… | ||
| scan0096 | Note specifying that parts called for on the L.O.P. are standard parts. | ||
| View original record | of those pieces to suit. All other parts called for on L.O.P. are standard parts. BY/RD | ||
| scan0097 | Comparative tests on waxed and varnished papers for use in coils and condensers. | ||
| View original record | To Roy. from EFC. c. BY. X8710 EFC3/T7.6.28. X1109 X8700 Further to our EFC3/T9.5.28 under cover of which we reported (PB24) results of some comparative tests of standard coil and condenser paper and… | ||
| scan0098 | Tests on various insulating papers to compare their properties under different conditions. | ||
| View original record | EPC. PB.26. May 31st. 1928. TESTS ON INSULATING PAPERS. A number of tests have been carried out on insulating papers, using samples of the standard (American) varnished paper, and varnished and waxed… | ||
| scan0099 | The conductance and dielectric strength tests of various insulating papers under different heating conditions. | ||
| View original record | -2- Contd. (2) The above tests were repeated, but this time readings were also taken as the temperature fell. An abridged table of results is given below, shewing the initial conductance for each… | ||
| scan0100 | Comparison of varnished and waxed papers for use in ignition coils and condensers, detailing their properties and suitability. | ||
| View original record | -3- Contd. In each case the result is the average of two tests. From these, heating appears to have practically no bad effect on the dielectric strength. The varnished paper obtained from Symons is… | ||
| scan0101 | Confirming the satisfactory use of 22 gauge coarser primary coils with double ballast resistances. | ||
| View original record | X8710 To EY. from EFC. c. BY/RD. EFC6/T8.6.28. RE USE OF 22 GAUGE COARSER PRIMARY COILS WITH DOUBLE BALLAST RESISTANCES. X8720 From extensive tests recently made on the road we are now in a position… | ||
| scan0102 | To Mr. Brock with instructions to wind a coil with a 22 Gauge primary and 18000 turn secondary. | ||
| View original record | X8710 To Mr. Brock. EFCS/T8.6.28. Will you please have this coil handed to you herewith wound with a 22 Gauge primary and 18000 turn secondary, like those you are now producing, and oblige. EFC.… | ||
| scan0103 | Requesting the replacement of a non-standard coil on chassis 15-EX. | ||
| View original record | To Hm. from EFC. c. HS/CEP X8710 EFCA/T8.6.28. The coil on chassis 15-EX, which chassis you are repairing, is not standard. Will you please have this returned to us at your convenience and supply… | ||
| scan0104 | Test report for standard ignition coils, detailing performance metrics against a specification. | ||
| View original record | X 8710 X.8781 cl. STANDARD IGNITION COILS D.70346. X.8710. X.5781 cl. [strikethrough] X.5710. [strikethrough] (22 S.W.G. primary 18,000 turn secondary). Table of Test Results: | Date. | Coil No. |… | ||
| scan0105 | Amended standard production test for a 22 SWG primary coil with double ballast resistance. | ||
| View original record | X8710 To EY. from EFC. c. Mr. Brock. c. Mx. EFC1/T9.6.28. PRODUCTION TEST OF 22 SEG. PRIMARY COIL WITH DOUBLE BALLAST RESISTANCE. Please find attached copy of our amended production test for the… | ||
| scan0106 | Production test procedure for an ignition coil. | ||
| View original record | 9.6.28. X.8781cl. X.5781cl. PRODUCTION TEST OF IGNITION COIL. X.8710. X.5710. (22 S.W.G. PRIMARY 18,000 TURN SECONDARY) (D.70346). (1) Continuity of primary and secondary circuits shall be tested by… | ||
| scan0107 | Test procedures for an ignition distributor and coil, detailing current, voltage, and spark gap specifications. | ||
| View original record | -2- Contd. just permits the passage of 1.00 ampere when the contacts are closed. The make ratio of the distributor can then be set by adjusting and locking the contact points in such a position as to… | ||
| scan0108 | Replacement of an ignition coil for chassis number 29-CL. | ||
| View original record | EFC. X8710 Hm/WSB6/KW11.6.28. Chassis No. 29-CL. (Late 15-EX). In reply to your EFC4/T8.6.28. we would say that we are this morning arranging to send over the ignition coil S.P.2. removed from the… | ||
| scan0109 | To Mr. Brock about using up existing standard coil cases for future tests to reduce costs. | ||
| View original record | To Mr. Brock. X8710 EFC/T1.2.6.28. We have in our Dept. several standard coil cases and we would prefer to use these up for any further experimental or other coils we may have for test, instead of… | ||
| scan0110 | Cancelling a previous instruction regarding the build-up of an ignition coil. | ||
| View original record | X8710 To RHC. from EFC. EFCL/T22.6.28. RE IGNITION COIL. With reference to the instruction contained in BY/RD5/MLL.3.28, will you kindly note that this is now cancelled. Will you please inform Mr.… | ||
| scan0111 | Experimental ignition coil with the primary wound on the outside. | ||
| View original record | V8710 To EFC. BY/RD5/ML22.6.28. IGNITION COILS. Herewith print of "D" Sch. 266 shewing the coil with the primary wound on the outside, we have used in as much production material as possible and this… | ||
| scan0112 | Request to Mr. Brock to wind a coil bobbin to specific standards for comparison with experimental coils. | ||
| View original record | X8710 To Mr. Brock. EFC1/T2.7.28. We hand you herewith coil bobbin which we would like you to wind as standard, i.e. 22 S.W.G. primary and 18000 turn secondary. We should like this done as soon as… | ||
| scan0113 | Instructions detailing experimental bench tests on two ignition coils with different primary windings. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12 24) MP 306975 X8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.7.C. Date 4 - 7 - 1928 Order No. WC114 Customer's No. Ignition coils with the windings packed out to the case… | ||
| scan0114 | Instruction sheet detailing continued tests on a coil, including temperature and leakage effect analysis. | ||
| View original record | RR 238 (150 BKS.) (DB 481-8-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (2) To_____________________19___ Order No. WC114 (contd) Customer's No._____________ 1 1/2 hours left on contact at 12… | ||
| scan0115 | Test report on coil operating temperatures and performance with a metal sheath. | ||
| View original record | RR 236 (150 BKS.) (DB 451-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To_____________________ (3) ______________________19__ Order No._______________ Customer's No.__________ metal sheath wound… | ||
| scan0116 | Test results for coils, comparing cooling, leakage, and insulation performance. | ||
| View original record | RR 238 (150 BKS.) (DB 431-B-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (4) To................................................................................. 19 Order… | ||
| scan0117 | The comparative testing of coils, concluding with a recommendation on winding packing. | ||
| View original record | RR 238 (150 BKS.) (DB 481-B-12 24) MP 306975 ROLLS-ROYCE, LTD. INSTRUCTIONS. To (5) 19 Order No. Customer's No. found that coil Y began to misfire on 5.5 m/m gaps after 2 hrs running and the coil X… | ||
| scan0118 | Report outlining reasons to believe that ignition coils were not being manufactured to the correct standard for secondary turns. | ||
| View original record | X8710 5.7.28. X.8710. IGNITION COIL. Reasons for supposing that the number of secondary turns on the ignition coil has not been put on to the standard or specified amount :- (1) Considerable No. of… | ||
| scan0119 | Temperature and leakage tests on experimental ignition coil cases made from new moulding powders. | ||
| View original record | 238 (150 BKS.) (DS 461-8-12 24) MP 306975 X4079 X8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To EFC Order No. PD 28 Customer's No. X 4079 Date July 6th 1928 Temperature - Leakage Tests on Experimental Coil… | ||
| scan0120 | Instruction sheet comparing leakage test results of different materials at various temperatures. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To__________________________________________________________________19__ Order No. PD 28 (2) Customer's… | ||
| scan0121 | Instructions detailing issues with galvanometer readings during material testing. | ||
| View original record | RR 23B (150 BKS.) (DB 431-8.12.24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To. 19 Order No. P.D 28 (3) Customer's No. however, at times, with the Celerons M and the Beetle powder cases, that the… | ||
| scan0122 | Winding temperature tests of ignition coils under various conditions. | ||
| View original record | X8710 To EY. from EFC. c. EY/RD. WINDING TEMPERATURE TESTS OF IGNITION COILS. X4079 In our EFC3/T11.5.27, entitled "Finer Primary Ignition Coils", we gave some results of tests of the average rise of… | ||
| scan0123 | Temperature measurement tests on two different types of coils (X and Y) under various conditions. | ||
| View original record | EFC3/T6.7.28. -2- Contd. any air space round the coil, or rather between the coil and the case. In this case one of the two coils, designated Y, was of the finer primary type, and one of the coarser… | ||
| scan0124 | Tests on electrical coils comparing heating at different voltages and performance under high temperatures. | ||
| View original record | EFC3/T6.7.28. -3- Contd. each case, but again the temperature attained when running is greater than that attained when standing on contact. It will appear, therefore, that in the use of the… | ||
| scan0125 | Final conclusions of tests on coil leakage and performance with earthed shields. | ||
| View original record | EFC3/T6.7.28. -4- Contd. "Tests carried out under (b) shewed that the leakage effect due to the earthed plate on the base was negligible, the length of series gap obtained for the various… | ||
| scan0126 | Testing and construction of ignition coils using paraffin wax paper insulation. | ||
| View original record | X8710 To EY. from EFC. c. BY/RD. EFC3/T11.7.28. IGNITION COILS WITH SECONDARY INSULATION CONSISTING OF PARAFFIN WAX PAPER IN PLACE OF OILED PAPER. Two of these coils, both of the finer primary type,… | ||
| scan0127 | Test procedure for comparing experimental coils. | ||
| View original record | X8710 24.7.28. COMPARISON OF EXPERIMENTAL COILS. X.8710 (1) First ascertain that the coil is in O.K. condition as regards continuity of windings. (2) Make suitable measurements of the resistances and… | ||
| scan0128 | Continuation of test procedures for an electrical coil, detailing various performance and endurance tests. | ||
| View original record | -2- Contd. (6) With the make and break as above, the coil shall be run for 5 hours at a voltage of 17.5 under similar standard conditions as before, and the secondary resistance again measured after… | ||
| scan0129 | Procedure for the examination and mileage testing of a coil under chassis conditions. | ||
| View original record | -3- Contd. (12) The coil shall then be removed from its case and the windings examined, if considered necessary, or the coil placed on an experimental chassis for a mileage test under chassis… | ||
| scan0130 | Instructing the construction of ignition coils and condensers with Symons waxed paper, and requesting the supply of reusable parts. | ||
| View original record | To EFC. X8710 BY/RD4/ML.8.8.28. IGNITION COILS AND CONDENSERS. Referring to EFC3/T.7.6.28 (Tests of Papers) and EFC3/T.11.7.28 we have instructed RHC to build 3 Coils and condensers with Symons waxed… | ||
| scan0131 | The production and standardisation of ignition coils and condensers with waxed paper for Phantom & 20 HP chassis. | ||
| View original record | VS710 C. EFC. BY/RD8/ML16.8.28. IGNITION COILS AND CONDENSERS - SEC:8130/40. PHANTOM & 20 H.P. CHASSIS. Will you please note that it is not now necessary to produce the 3 Coils and Condensers with… | ||
| scan0132 | To Mr. Brock regarding the receipt of three ignition coils made of waxed paper. | ||
| View original record | To Mr. Brock. X8710 EFC1/T20.8.28. We should be pleased to receive the three ignition coils made up of waxed paper as instructed in BY/RD8/ML16.8.28. EFC. | ||
| scan0133 | Urging the supply of three ignition coils made with waxed paper. | ||
| View original record | X8710 To HHC. from EFC. EFC2/T21.8.28. We should like to urge with you the three ignition coils made up with waxed paper to instruction EY/RD8/ML16.8.28. I believe Mr. Brock has al ready produced… | ||
| scan0134 | Suggesting the best method for moisture-proofing ignition coil primaries by baking and varnishing. | ||
| View original record | To BY. from EFC. c. BY/RD. c. Mr. Brock. X.8710 EFC3/T27.8.28. IGNITION COIL PRIMARIES We suggest that the best method of ensuring moisture-proof coil primaries is to bake the coil, after winding with… | ||
| scan0135 | Fitting and testing paraffin waxed paper ignition coils on experimental chassis. | ||
| View original record | To RHC. from EFC. c. Hs/AJL. Y8710 EFC1/T3.9.28. PARAFFIN WAXED PAPER IGNITION COILS. We hand you herewith two of the above type coils designated PWP4/5 tested O.K. We should like you to have these… | ||
| scan0136 | Test report on a paraffin waxed paper coil on an experimental chassis. | ||
| View original record | RR 238 (150 BKS.) (DB 451-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E7C. Order No.: WD10 Customer's No.: X 8710 Date: 17 - Sept - 1928 Tests of paraffin waxed paper coil No P.W.P.5 on expl… | ||
| scan0137 | Instructions detailing engine misfiring issues and diagnostic steps taken, including ballast replacement. | ||
| View original record | RR 23B (150 BKS.) (DB 451-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To______________________________________.19 Order No. (2) Customer's No.________________ After the engine had been… | ||
| scan0138 | Instructions detailing the investigation of an engine coil that mysteriously weakens at high temperatures. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8 12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To...................................................19.... Order No. (3) Customer's No. ....................... Allowing… | ||
| scan0139 | Road test report for a paraffin waxed paper coil on a 9EX experimental car. | ||
| View original record | RR 238 (150 BKS.) (OB 461-B 12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.7.C. Order No. WD9. Customer's No. X8710 Tests with P.W.F coil on 9EX. We have now conducted a road test on 9EX expl… | ||
| scan0140 | Instructions for troubleshooting a misfire, suggesting fitting a standard earthing connection to the distributor to resolve the issue. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE, LTD. INSTRUCTIONS. To Order No. (2) Customer's No. We then changed the coil for a standard coil and repeated the tests with the same result.… | ||
| scan0141 | Test report on a standard ignition coil on engine 10 EX, detailing misfires during pick-up at high temperatures. | ||
| View original record | ROLLS-ROYCE, LTD. INSTRUCTIONS. To E7C Order No. WDII Customer's No. X 8710 Tests of standard ignition coil on 10EX. The engine was first tested at normal running temp i.e 80°C at low speeds and on… | ||
| scan0142 | Instruction sheet detailing ignition system adjustments and performance tests, noting issues with misfires during acceleration. | ||
| View original record | Order No. (2) by any old std single type and the ignition again tried, when low speed running and pick up were found to be quite OK. The double ballast was then put back and the contact breaker gap… | ||
| scan0143 | Test report comparing the performance of a standard ignition coil against a P.W.P. coil after prolonged heating. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. RR 238 (150 BKS.) (OB 461-8-12-24) MP 306975 To____________________ Order No. (3) Customer's No.____________________ not much difference between the standard coil and… | ||
| scan0144 | Requesting experimental modifications for a 20,000 turn ignition coil and a new type of ballast resistance. | ||
| View original record | To EY, from EFC. c. EY/RD. RHC. X.8710 EFC2/T19.9.28. 20,000 TURN IGNITION COIL. Would you please instruct experimentally an otherwise standard ignition coil but of 20,000 turns (secondary in place of… | ||
| scan0145 | High-temperature bench test results for a paraffin-waxed paper coil. | ||
| View original record | RR 239 (150 BKS.) (DB 461-8-12-24) MP 306975 X8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.F.C. Order No: WD12 Customer's No: X8710 Paraffin waxed paper coil No P.W.P.5. We have now conducted high… | ||
| scan0146 | Test report on a distributor with 5.5mm third point spark gaps in air. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To___________________________19__ Order No. (2) Customer's No. __________________ distributor on 5.5mm third point spark… | ||
| scan0147 | Instructions detailing adjustments to a contact breaker and ballast, and observing performance at various RPMs. | ||
| View original record | RR 238 (150 BKS.) (OB 461-8.12.24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To ___________ 19__ Order No. (3) Customer's No. __________ then increased to .025" and it was found possible to insert an… | ||
| scan0148 | Instructions memo confirming satisfactory coil operation with current settings. | ||
| View original record | RR 238 (150 BKS.) [DB 461-8-12-24] MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. (4) Customer's No. These results generally confirm our observations on the Chassis and there would certainly… | ||
| scan0149 | Road test procedure for experimental ignition coils. | ||
| View original record | X8710 22.9.28. EXPERIMENTAL IGNITION COIL ROAD TEST PROCEDURE. (1) Check battery voltage and contact breaker adjustment. (2) By means of cells inserted in reverse direction in series with ignition… | ||
| scan0150 | Two faulty ignition coils with partially burnt primaries sent for inspection. | ||
| View original record | To EFC. X8710 BY/RDS/ML 28.9.28. IGNITION COILS. For your information I am sending herewith 2 coarser primary coils returned as faulty for you to see the partially burnt state of the primarys, the… | ||
| scan0151 | Bench tests and leakage tests conducted on paraffin wax filled coils. | ||
| View original record | X8710 COPY. WD.14. 29.9.28. X1109 X.8710. PARAFFIN WAX FILLED COILS. We have now conducted bench tests on two coils one wound and insulated with standard oiled paper and the other insulated with… | ||
| scan0152 | The performance and electrical properties of paraffin wax filled coils. | ||
| View original record | -2- WD.14. and the wax remained white as when new, but in the case of (b) the wax became discoloured brown and a conductance of .003 micromhos was obtained. We therefore conclude that paraffin wax… | ||
| scan0153 | Testing and construction of a 20,000 turn ignition coil using paraffin wax paper insulation. | ||
| View original record | X8710 To BY. from EFC. c. BY/RD. EFC8/T1.10.28. 20,000 TURN IGNITION COIL. Referring to our note EFC2/T19.9.28 in which we asked for you to instruct a 20,000 turn ignition coil, we are now of the… | ||
| scan0154 | Use of paraffin wax for insulating ignition coils. | ||
| View original record | To BY. from EFC. c. BY/RD. c. Mr. Brock. X8710 EFC9/T1.10.28. PARAFFIN WAXED PAPER INSULATED AND PARAFFIN WAX FILLED IGNITION COILS. We have not been able to prove any material advantage of the… | ||
| scan0155 | Bench tests conducted on paraffin wax filled coils to assess their performance and temperature effects. | ||
| View original record | EFC. WD.14. 29.9.28. PARAFFIN WAX FILLED COILS. We have now conducted bench tests on two coils, one wound and insulated with standard oiled paper and the other insulated with paraffin waxed paper,… | ||
| scan0156 | Conclusion on the lack of advantage of using paraffin wax-filled coils over standard ones. | ||
| View original record | -2- We do not consider there is much advantage over standard with coils filled with paraffin wax. EPC/H.E.West. | ||
| scan0157 | Failures of the Phantom ignition coil due to overheating and a proposal to reposition it. | ||
| View original record | To R. from EFC. c. BJ. BY. E. V6910 EFC/T3.10.28. PHANTOM IGNITION COIL POSITION. There is now some amount of evidence that the position of the Ignition Coil on the Phantom, where it is subject to… | ||
| scan0158 | Page outlining the procedure for measuring coil temperature increase by resistance and conducting insulation tests. | ||
| View original record | -2- Contd. We are proceeding to measure increase of coil temperature by increase of both primary and secondary winding resistances in the following cases :- 20 H.P. chassis coil not operating. " " "… | ||
| scan0159 | Ignition coil test procedure on a Phantom model. | ||
| View original record | X8710. 9.10.28. IGNITION COIL TEST ON PHANTOM. ______________________________ (0) Arrange switch to short contact breaker. (1) Run engine normally but with weak mixture on battery, magneto and charge,… | ||
| scan0160 | Instructions detailing tests on ignition coil temperature for 20HP and 40/50HP chassis. | ||
| View original record | RR 238 (50 BKS.) (DB 461-8-12-24) MP 306975 X8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E7C Order No.: WD15 Customer's No.: X8710 Coil temperature on R.R. 20HP and 40/50 HP Chassis. A number of tests… | ||
| scan0161 | Instructions for tests on coil heating and resistance carried out on various chassis. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 305975 ROLLS-ROYCE LTD. INSTRUCTIONS. (2) To_____________________19__ Order No. WD15 (contd) Customer's No.____________ comparisons were obtained of the heating… | ||
| scan0162 | Instructions for testing ignition coil temperatures under different engine running conditions, including magneto and battery ignition. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. (3) To______________________ Order No. WD15 (contd) Customer's No. __________________ computing the temperature after heating up the coil by conductance and radiation… | ||
| scan0163 | Test results for engine coil temperatures under different ignition conditions. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. (4) To_____________________19__ Order No. WD15 (cont'd) Customer's No. Coil temperature after running the engine 30 mins on magneto Primary winding - 64°C. Secondary… | ||
| scan0164 | Instructions and test results for coil temperature after running on battery ignition and magnetos. | ||
| View original record | RR 238 (150 BKS.) [OB 461-8·12·24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (5) To ...............19 Order No. WD 15 (contd) Customer's No. Coil temperature after running the engine 1 hr on battery… | ||
| scan0165 | Instructions and test results for ignition coil temperature readings. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (6) To__________________________________19__ Order No. W015 (contd) Customer's No._____________ Coil temperature after 1 1/2… | ||
| scan0166 | Coil temperature test results for a 40/50 HP chassis 98NK after road running on different ignition systems. | ||
| View original record | RR 239 {150 BKS.} {DB 461-8-12-24} MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (7) 19 To Order No. WD15 (contd) Customer's No. Test 5. 40/50 H.P. chassis 98NK with standard coil. Car running on road.… | ||
| scan0167 | Continuation test instruction sheet (page 8) detailing coil winding temperatures after a run on battery ignition. | ||
| View original record | RR 228 (150 BKS.) (DB 451-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (8) 19 To Order No. WD15 (contd) Customer's No. Primary winding 68°C Secondary winding 66°C Coil temperature after 1 1/2 hrs… | ||
| scan0168 | Instruction sheet detailing maximum ignition coil temperatures and charring conditions. | ||
| View original record | RR 238 (150 BKS.) (DB 461-B 12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (9) To ............................. ..............................19.. Order No. WD15 (Contd) Customer's No. .............… | ||
| scan0169 | Comparing the heating of the Phantom ignition coil in different positions on 20 HP and 40/50 HP chassis. | ||
| View original record | To R. from EFC. c. BJ. E. BY. X8710. EFC4/T2.11.28. PHANTOM IGNITION COIL POSITION. X8710 Further to our EFC1/T3.10.28 we have now completed a series of tests with a view to comparing the heating of… | ||
| scan0170 | Temperature tests conducted on ignition coils for 20 HP and 40/50 HP chassis. | ||
| View original record | Contd. -2- EFC4/T2.11.28. Corresponding temperatures observed in a similar way after the battery ignition had been operating for an additional 1½ hours were 93 and 93 respectively. Corresponding… | ||
| scan0171 | Internal memorandum requesting the production of a new Ignition Coil and Ballast Resistance to updated drawings for testing. | ||
| View original record | X8710 To RHC. C. EFC. BY/RD5/ML7.11.28. IGNITION COIL - SEC:8140. Will you please put in hand, one each, Ignition Coil and Ballast Resistance to the following:- Coil to L.O.P. D.71650 - All standard… | ||
| scan0172 | Electrical experimental record sheet logging the testing and failure of a standard coil with waxed paper insulation. | ||
| View original record | X8710. Standard coil made up with waxed paper insulation instead of oil paper. (25 SWG Primary) ELECTRICAL EXPERIMENTAL RECORD SHEETS. P.W.P.1 Table Columns: Date on. Location. Date off. REMARKS.… | ||
| scan0173 | Electrical experimental record sheet for a finer primary coil with specially built up primary winding. | ||
| View original record | X8710 ELECTRICAL EXPERIMENTAL RECORD SHEETS. SP 4 X. No: - 8710 Finer primary Coil with specially built up primary winding | Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles… | ||
| scan0174 | Ignition coil failures and proposing experimental modifications to the windings to prevent electrical breakdown. | ||
| View original record | X8770 To EY. from EFC. c. WY/RD. c. Mr. Brock. EFC3/T31.12.28. FAILURES OF IGNITION COILS. Attached please find copy of my assistant's report WD.23. The bench tests referred to in the first para. are… | ||
| scan0175 | Ignition coil failures during bench tests, identifying the cause as insulation breakdown. | ||
| View original record | EFC. WD.23. COPY 29.12.28. IGNITION COIL FAILURES We have had two failures recently in the lab. of standard (22 SWG primary) ignition coils during certain bench tests. These coils were running during… | ||
| scan0176 | Requesting an ignition coil core be rewound to a standard order. | ||
| View original record | To Mr. Brock. X8710 EFC3/T1.1.29. We hand you herewith an ignition coil core numbered DX45X. Will you kindly have this rewound to standard L.O.P. to order number 54733. EFC. | ||
| scan0177 | Improvements to the winding of ignition coils. | ||
| View original record | HEW EFC. X8710 BY2/G.7.1.29. IGNITION COILS. We are quite in agreement with the suggestion of using a tube to wind secondary on, and as a matter of fact instructions were issued by me to D. Dept. six… | ||
| scan0178 | Instructions and results for a coil temperature test with a ballast resistance. | ||
| View original record | RR 228 (150 BKS.) (DB 461-8-12-24) MP 306975 X8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To E7C. Order No. WD28. Customer's No. X8710 15 - 1 - 1929 Coil temperature test with ballast resistance of 1 1/2… | ||
| scan0179 | Coil temperature increases using different ballast resistances and the potential detrimental effects. | ||
| View original record | RR 23B (150 BKS.) (DB 461-B 12 24) MP 306975 ROLLS-ROYCE, LTD. INSTRUCTIONS. (2) To Order No. (WD 28 contd) Customer's No. being approx. 16°C. Corresponding temperatures using a double value ballast… | ||
| scan0180 | Urgently requesting an Ignition Coil, part number D.71650. | ||
| View original record | RHC. from EFC. X8710 EFC3/T15.1.29. Will you please note that we now urgently require Ignition Coil to L.O.P. D.71650, instructed by EY/RD5/ML7.11.28. EFC. | ||
| scan0181 | Inquiring about the completion status of an ignition coil test. | ||
| View original record | To EFC. X.8710 BY/RD5/ML30.1.29. IGNITION COIL. Re BY/RD5/ML7.11.28. Has this coil completed its test please? RECEIVED BY/RD. | ||
| scan0182 | To Mr. Brock requesting the winding of a coil to specification D.71919. | ||
| View original record | To Mr. Brock. X.870 EFC/T2.2.29. Will you please wind us another coil to D.71919 with 20000 turn secondary and flat primary. We hand you herewith coil bobbin and case which can be used up on this job.… | ||
| scan0183 | Table of resistance and inductance particulars for various ignition coils at atmospheric temperature. | ||
| View original record | X.4596 X.4079 x 4079 / 8710 PARTICULARS OF RESISTANCES AND INDUCTANCES OF R.R. GOSHAWK IGNITION COILS. at atmospheric temp't. PRIMARY Coil. | Resis. (W) | Imped. at 50 (W) | Reac. at 50 (W) | Induc.… | ||
| scan0184 | Instruction note regarding the supply of an Ignition Coil to the Experimental Department. | ||
| View original record | RR 238 (150 BKS.) (SH57. 29-6-28.) MP 22435B V8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E F C Date: 8 - 2 - 1929 Order No. Customer's No. Herewith Ignition Coil as per Memo By/RRDJ/ML 7-11-28 Your… | ||
| scan0185 | Test log for a coil with a specially built-up primary winding. | ||
| View original record | X8710 ELECTRICAL EXPERIMENTAL RECORD SHEETS. SP5 X. No:- 8710 Coil with specially built up primary winding | on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. |… | ||
| scan0186 | Production test procedures for an ignition coil. | ||
| View original record | 18.2.29. X. 8781 cl. PRODUCTION TEST OF IGNITION COIL. X.8710 X. 5781 cl. (22 S.W.G. PRIMARY 18,000 TURNS SECONDARY) (D.70346). (Amended to suit 1¼ value ballast resistance) (1) Continuity of primary… | ||
| scan0187 | Test procedures for an electrical distributor and contact breaker. | ||
| View original record | -2- Contd. in circuit with the 12 volt battery, ammeter, and contact breaker, just permits the passage of 1.00 ampere when the contacts are closed. The make ratio of the distributor can then be set by… | ||
| scan0188 | Production test for an ignition coil amended for a new ballast resistance. | ||
| View original record | BY. from FFC. c. Mr. Brock. c. Mx. X8710 EFC2/LG19.2.29. PRODUCTION TEST OF IGNITION COIL. X.5710 Please find attached copy of production test for the 18,000 turns coarser primary coil duly ammended… | ||
| scan0189 | Testing status of paraffin waxed paper ignition coils. | ||
| View original record | X8710 EY/RD. from EFC. EFC8/T26.3.29. IGNITION COILS. Referring to your enquiry regarding paraffin waxed paper coils, and 20,000 turn coil with flat primary - we hope now to be getting back to the… | ||
| scan0190 | Requesting the production of an experimental ignition coil with 20,000 turns instead of the standard 18,000. | ||
| View original record | X.8710 To Mr. Brock. from EFC. EFC/T4.4.29. IGNITION COIL. The 20,000 turn coil with which you provided us to our instruction EFC/T2.2.29 has also paraffin wax paper insulation which we did not… | ||
| scan0191 | Instruction sheet detailing road test results for a paraffin waxed paper coil. | ||
| View original record | RR 238 (150 BKS.) (DB 461-B 12-24) MP 306975 X8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.7.C Date 6-4-1929. Order No. WD51 Customer's No. X8710 Paraffin waxed paper coil P.W.P.4 We have completed road… | ||
| scan0192 | Instruction sheet detailing the comparison of a coil against a standard and the planned investigation into paraffin wax leakage at high temperatures. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. (2) To ______________ Order No. WD51 (contd) Customer's No. ______________ standard coil, so we could not determine any advantage with this coil over standard. Unless… | ||
| scan0193 | Coil XQP15, which has been modified with 2,000 extra turns on its secondary winding. | ||
| View original record | EFC. X6710 12.4.29 Herewith coil XQP15 This is the coil from you recently asked for with 2,000 turns extra on secondary winding. E.J.Brock. | ||
| scan0194 | Procedure for testing and comparing experimental coils. | ||
| View original record | X8710 23.4.29. COMPARISON OF EXPERIMENTAL COILS. X.8710. (1) First ascertain that the coil is in O.K. condition as regards continuity of windings. (2) Make suitable measurements of the resistances and… | ||
| scan0195 | Continued test procedure for an electrical coil, outlining steps for performance evaluation under various conditions. | ||
| View original record | -2- Contd. (6) The coil shall be run for 5 hours under standard conditions at a voltage of 17.5, and the secondary resistance again measured after the run, and the temperature of the coil calculated… | ||
| scan0196 | Continuation page detailing endurance testing procedures for a coil component. | ||
| View original record | -3- Contd. maintained at 80°C and the performance noted at 12 volts on the spark gaps (as before) at the end of the run. (12) An endurance test of 500 hours duration shall be carried out on the coil… | ||
| scan0197 | Telegram reporting the failure of an ignition coil and its replacement with a spare. | ||
| View original record | POST OFFICE TELEGRAPHS. B or C CT EXPT + This form, and if possible the envelope, should accompany any enquiry respecting this Telegram. 62/M From Ball Prefix. Time handed in. Office of Origin and… | ||
| scan0198 | Experimental ignition coil test programme. | ||
| View original record | X. 8710. 25.4.29. EXPERIMENTAL IGNITION COIL TEST PROGRAMME. (1) Previous to start:- Coil in question put on car, cells and wires arranged by front passenger and observer to enable ignition voltage… | ||
| scan0199 | Request to supply the Experimental Department with two experimental ignition coils. | ||
| View original record | X8710. To Mr. Brock. EFC1/T10.5.29. EXPERIMENTAL COILS. Will you please supply Expl. Dept. to O/N.54733 with two ignition coils of 20,000 turn secondaries and without the extra insulation at the end.… | ||
| scan0200 | Extract from a report on a faulty ignition coil that was causing mis-fires. | ||
| View original record | X8710. 30.5.29. Extract taken from Mr.Hancock's report of 2.5.29. X.8710. IGNITION COIL LOP. D.71650 The coil started to cause mis-fires after a milage of approximately 8,000, and after a further 700… | ||
| scan0201 | The fitting of an experimental ignition coil to a specific chassis. | ||
| View original record | X8710 RHC. from EFC. c. Hc/AJL. EFCL/T7.5.29. We hand you herewith special experimental ignition coil numbered LS1 wound with 20,000 turns on the secondary, the insulation being paraffin waxed paper.… | ||
| scan0202 | Testing of a new coil design with a Bakelite spool and altered insulation. | ||
| View original record | Mr Brock X8710 c. BY/RD. c. EFC. With reference to the special coil you have handed to us we are of course equally desirous with yourself to arrive at a primary winding wound on a spool of Bakelite,… | ||
| scan0203 | Internal request to change a PWP coil on chassis 17-G4 for a standard ignition coil. | ||
| View original record | To RHC. from EFC. C. to Hs/AJL. X 8710 EFC1/D17.5.29 PWP COIL ON CHASSIS 17-G4 Will you please arrange to have this coil changed for an ordinary standard ignition coil, (which we hand you herewith),… | ||
| scan0204 | Arranging for ignition coil road tests to be conducted by Mr. West. | ||
| View original record | X8710 HS/AJL. from EFC. EFCl/D18.5.29 IGNITION COIL TESTS. We have a number of tests we would like to do on ignition coils on the road, and we shall be pleased if you will arrange to give Mr.West the… | ||
| scan0205 | Instruction note regarding the dispatch of four ignition coils to Drawing D.71919. | ||
| View original record | RR 285 (150 BKS.) (SH57.29-6-20.) MP 224355 X8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC Date: 24 - 5 - 1929 Order No. Customer's No. Herewith 4 Ignition Coils to Drg D. 71919 as per memo B75/685 29… | ||
| scan0206 | Faulty ignition coil from car 22-EX in France, detailing misfires and its return to Derby for investigation. | ||
| View original record | By. from EFC. c. Ey/RD. X8710 EFC2/AD29.5.29. X.8710. IGNITION COIL ON 22-EX IN FRANCE. Referring to the paragraph of Mr.Hancock's report dealing with the ignition coil, and reading as follows :- "The… | ||
| scan0207 | Investigation into the failure of an ignition coil from a test car in France. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. RR 228 (150 BKS.) (DB 461-8 12 24) MP 206975 To E.7.C Order No. WD61. Customer's No. X 8710 Re. failure of ignition coil on 10000 mile test car 22EX in France. The coil… | ||
| scan0208 | Instruction sheet detailing a fault with a secondary winding and the proposed remedial actions. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. RR 23B (150 BKS.) (DB 461-8.12.24) MP 306975 19 To Order No. WD61 (Contd) Customer's No. The fault appears to have been caused by (a) bad uneven foundation for the… | ||
| scan0209 | Instruction to fit three ignition coils with 20,000 secondary turns to specific chassis. | ||
| View original record | X 8710 RHC/FW. from EFC. EFC7/AD3.6.29. IGNITION COIL WITH 20,000 SECONDARY TURNS TO D. 71919. We hand you herewith three of these coils Nos. LS3, LS4, LS5. Will you please have these fitted to… | ||
| scan0210 | Instruction sheet detailing part numbers for coils related to a specific drawing number and order completion. | ||
| View original record | RR 238 (150 BKS.) (SH57.29-6-29.) MP 224358 X 8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To: SFC Order No.: Customer's No.: 4-6-19 29 Aeromint 2 Coils. X V X 75 & X.V.K 65. These are now made to Drg D71919.… | ||
| scan0211 | Request to test, modify, and fit two paraffin waxed paper condensers to specific chassis. | ||
| View original record | X8710 RMC/HPS. from EFC/HEW c. Hs/AJL. EFC is absent EFC/HEW1/AD18.6.29. X. 8710 X. 8700. PARAFFIN WAXED PAPER CONDENSERS. As a result of testing ignition coils made up with paraffin waxed paper, we… | ||
| scan0212 | Request for two paraffin waxed paper condensers for bench tests, following previous tests on an experimental chassis. | ||
| View original record | X8710 EFC is absent By/RD. from EFC/HEW. EFC/HEW2/ADL8.6.29. X.8710 X.5700 PARAFFIN WAXED PAPER CONDENSERS. X8700 At the same time as we are testing paraffin waxed paper coils, we also want to test… | ||
| scan0213 | Road test report for ignition coil No. LS1. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 X.8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.7.C. Order No. WD69 Customer's No. X8710 20-6-1929 Ignition coil NO. LS1. We have carried out a road test on… | ||
| scan0214 | Continuation of a test report on engine performance and ignition systems at varying temperatures and conditions. | ||
| View original record | -2- contd. The performance was tried with the water temperature first at 80°C and secondly at 100°C. A high speed test of the ignition was also carried out at 8 volts with a weak mixture and with the… | ||
| scan0215 | Allowing Mr. Minchin to retain a coil and ballast resistance for experimental reporting. | ||
| View original record | X8710. D/BP/WH. from EFC. EFCL/AD26.6.29. X8720 With reference to Mr.Minchin's letter M/5 of the 24th inst. we should, if convenient, allow Mr.Minchin to keep both coil and ballast resistance for the… | ||
| scan0216 | Request to fit an experimental 20,000 turn secondary ignition coil to chassis 12-G4. | ||
| View original record | X.8710 RHC. c. Hs/AJL. EFC5/AD8.7.29. EXPERIMENTAL 20,000 TURN SECONDARY IGNITION COIL TO D.71919. Will you please have one of these coils No.LS7, which we have sent in to Mr.Tooby. fitted to chassis… | ||
| scan0217 | Cover memo regarding failures of ignition coil secondaries, referencing an attached report. | ||
| View original record | X8710 Ry. from EFC. c. Ry/RD. c. Sft/Mr Brock. EFC5/AD9.7.29. IGNITION COIL FAULTS. With reference to the failures of ignition coil secondaries, please find attached copy of my assistant's report… | ||
| scan0218 | Instruction sheet detailing the fault finding on a returned coil by unwinding it. | ||
| View original record | RR 228 (150 BKS.) l05 461-8 12.24) MP 306975 X8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E7C. Date: 9-7-1929 Order No.: WD71 Customer's No.: X8710 Coil NO EZ85 returned faulty. This coil has been… | ||
| scan0219 | Investigation into a faulty coil, identifying the cause as a poor and irregular foundation for the secondary winding. | ||
| View original record | RR 238 (150 BKS.) [OB 461-8-12-24] MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (2) To___________________ 19__ Order No. WD 71 contd Customer's No. _____________________ Although on test the coil was… | ||
| scan0220 | Instructions on remedying irregular wire spacing and stress on a coil. | ||
| View original record | RR 238 (150 BKS.) (OB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (3) To____________________ 19__ Order No. WD71 (contd) Customer's No. __________ b) Irregular spacing of the secondary wire… | ||
| scan0221 | Failures and testing of new ignition coil designs. | ||
| View original record | X8710 EFC. BY/RD1/N.11.7.29. Ignition Coils. With reference to your report on Ignition Coil failures, we of course appreciate that the soft foundation on to which we wind the secondary is detrimental… | ||
| scan0222 | Electrical experimental record sheet for a coil with specially built up windings. | ||
| View original record | X8710. SP8 ELECTRICAL EXPERIMENTAL RECORD SHEETS. X. No: - 8710 Coil with specially built up windings on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles… | ||
| scan0223 | Requesting confirmation on details for the standard ignition coil. | ||
| View original record | X8710. By/RD. from EFC. EFC3/ADL8.7.29. X.8710. STANDARD IGNITION COIL. Referring to attached, will you please confirm or otherwise, if these details are O.K. EFC. | ||
| scan0224 | Particulars of construction for the present standard ignition coil. | ||
| View original record | X8710 18.7.29. X.8710. PARTICULARS OF CONSTRUCTION OF PRESENT STANDARD IGNITION COIL. Core built up of 24 S.W.G. (.022) Iron (Stalloy) wires. Core insulation .006 Oil silk .750 wide 1/2 Lap = .012… | ||
| scan0225 | Coil and Ballast Resistance for chassis GFN-8, requesting the units be sent to settle the job. | ||
| View original record | X8710 EFC. Hm/AVS23/KW5.9.29. Chassis No. GFN-8. G.R.N. Minchin Esq. With reference to the Coil and Ballast Resistance that was handed to you in July last for examination and test. Will you kindly… | ||
| scan0226 | Specification table for various coil primary windings. | ||
| View original record | X8710. 25.9.29. X.918 - COIL PRIMARY WINDINGS. X.4079, X.4273, X.3173, X.3445, X.4596, X.8710, X.4501. Short. | Coil. | Number of turns. | Number of layers. | Dia. of wire. | Gauge of wire. | Approx.… | ||
| scan0227 | Test schedule report for various experimental coils, detailing electrical and thermal performance. | ||
| View original record | X.8710 X.8710. TESTS OF EXPERIMENTAL COILS TO SCHEDULE. DATED 23.4.29. X.4501. Date. | Coil No. | (1) | (2) Primary Resis.(ohms) Induct.(henries) | Secondary Res. ind.(ohms)(henries) | Temp. °C. | (3)… | ||
| scan0228 | Burnt-out ignition coil, requesting investigation and repair. | ||
| View original record | HEW X8710 To. EFC. c.c. Mr Gamble. [struck through] BY/RD2/N.4.10.29. Re: Ignition Coils. This is to confirm that we have handed to you Ignition Coil CC.35.X which is a coil having a .C28 diameter… | ||
| scan0229 | Electrical failures and subsequent repairs on Chassis No. 101-UF. | ||
| View original record | By/RD. X8710 Hm/AVS5/KW7.10.29. Re Chassis No. 101-UF. With reference to our memo. Hm/AVS9/KW30.9.29. re the burnt out D.71650 latest Type Coil No. CC-35-X. We give below as requested details of… | ||
| scan0230 | Inquiring about the highest recorded temperature under a car bonnet in relation to ignition coils. | ||
| View original record | X8710. Hs/AJL. from EFC. EFC5/AD8.10.29. TEMPERATURE UNDER BONNET. In connection with the working temperature of ignition coils, would you let us know the highest temperature figure which has ever… | ||
| scan0231 | Failure and burnout of an ignition coil on chassis 101-UF. | ||
| View original record | EFC. X8710 BY10/G.8.10.29. IGNITION COIL - CHASSIS 101-UF. We attach hereto the original of Hm/AVS5/KW. 7.10.29. which represents the reply to a request on our part for more information in regard to… | ||
| scan0232 | Instruction sheet detailing coil temperature tests under abnormal conditions. | ||
| View original record | RR 239 (150 BKS.) (DB 461-8-12-24) MP 306975 X.8710. ROLLS-ROYCE LTD. INSTRUCTIONS. To E.7.C. Order No. WD80 Customer's No. X 8710 Date: 10-10-1929 Coil temperature tests on standard 22 SWG primary… | ||
| scan0233 | Continuation sheet of a coil test report, detailing the conditions and procedure for Test 2. | ||
| View original record | RR 238 (150 BKS.) (OB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (2) To_____________________ Order No. WD80 (contd) Customer's No.____________ The coil was run continuously for 8 hours… | ||
| scan0234 | Test report on the temperature of a coil and the condition of its primary insulation after testing. | ||
| View original record | RR 23a (150 BKS.) (DB 461-B 12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (3) To_________________ 19__ Order No. WD80 (contd) Customer's No._____________ The coil primary temperature was ascertained… | ||
| scan0235 | Investigation into a failed ignition coil on chassis 101-UF. | ||
| View original record | X 8710 By. from EFC. c. Hm/AVS. c. N. EFC1/AD10.10.29. X8783 IGNITION COIL CC.35X. EX CHASSIS 101-UF. With reference to the ignition coil CC.35X. which failed on the above chassis and has been found… | ||
| scan0236 | Typed memorandum discussing the use of an auto switch control system as a remedy for a recurring danger. | ||
| View original record | -2- The remedy for cases of this kind, as we have from time to time urged with R, is the use of the auto switch control (which we are now further developing). As you know, we have often pointed out… | ||
| scan0237 | Experiments to determine the charring temperature of cotton-covered ignition coil wire. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To E.7.C Date 14 - 10 - 1929 Order No. WD81 Customer's No. X 8710 Charring condition of ignition coil primary cotton covered wire. We have conducted two experiments to… | ||
| scan0238 | Instructions detailing the discoloration of a wire at various temperatures, from 200°C up to 320°C. | ||
| View original record | RR 238 (150 BKS.) (OB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (2) To____________________19___ Order No. WD81 (contd) Customer's No.__________________ a glass thermometer. In this case… | ||
| scan0239 | Ignition coil temperature tests and the charring effect on the primary winding. | ||
| View original record | By. from EFC. c. HS. c. HS/AJL. c. EY/RD. X8710. EFC1/AM.16.10.29. X.8710. IGNITION COIL TEMPERATURES AND CHARRING EFFECT ON PRIMARY WINDING. Further to our EFC1/AM.10.10.29, you will probably be… | ||
| scan0240 | The testing of a coil and the charring temperature of its cotton insulation. | ||
| View original record | -2- After being subject to this treatment, the coil was first normally tested and was found to be quite normal in operation, and afterwards it was opened up and unwound for examination. The condition… | ||
| scan0241 | Temperature tests conducted on the primary windings of ignition coils for 40/50 and 20 HP chassis. | ||
| View original record | Ry. from EFC. c. Hs. c. Hs/AJL. c. Ry/RD. X8710 EFC2/AML6.10.29. X4501 TEMPERATURE TESTS ON THE ROAD OF PRIMARY WINDINGS OF IGNITION COILS ON 40/50 AND 20 HP CHASSIS. In this connection may we remind… | ||
| scan0242 | Comparison of running temperatures between an experimental L.C. type coil and a standard S.S. coil. | ||
| View original record | -2- from which it will be seen from comparison with the previous results quoted that in the same circumstances of running, the L.C. coil temperatures are, as anticipated would be the case, slightly… | ||
| scan0243 | Correspondence regarding a replacement ballast resistance for an ignition coil on chassis 101-UF. | ||
| View original record | X8710 EFC. Hm/AVS8/MW17.10.29. re CHASSIS 101-UF 40/50. With reference to your EFC1/AD10.10.29. re the ignition coil No.C.C.35X D.71650. As requested by you we have obtained the ballast resistance for… | ||
| scan0244 | Instruction sheet detailing the examination and replacement of a ballast resistance on chassis 101.UF. | ||
| View original record | RR 228 (150 BKS.) (DB 461-8-12-24) MP 306975 X8710. ROLLS-ROYCE LTD. INSTRUCTIONS. To: E. & C. Order No.: WD84 Customer's No.: X8710 / X7720 Date: 21-10-1929 Ballast resistance off chassis 101.UF. We… | ||
| scan0245 | Faulty ballast resistance on chassis 101-UF and experiments on new nickel fuse wires. | ||
| View original record | X.8710. Ey. from EFC. c. Ry/RD. c. Hm/AVS. EFC3/AD22.10.29. CHASSIS 101-UF. In further answer to your Ry10/GS.10.29, we have now received and examined the ballast resistance from this car. we found… | ||
| scan0246 | Correspondence regarding an overheating ballast resistance on chassis 101-UF due to over voltage, and the dispatch of a replacement. | ||
| View original record | X8710. Hm/AVS. from EFC. EFC4/AD22.10.29. 40/50 HP. CHASSIS 101-UF. Referring to your Hm/AVS8/MW17.10.29, we duly examined the ballast resistance. This showed distinct signs of abnormal heating by… | ||
| scan0247 | Instructions and results for coil temperature tests comparing an old standard single ballast with the present standard ballast. | ||
| View original record | RR 238 (150 BKS.) (DB 461-B-12-24) MP 306975 X. 8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.7.C. Order No. WD86 Customer's No. X8710 Coil temperature tests Further to WD80/10-10-29 we have conducted… | ||
| scan0248 | Ignition coil temperature and charring tests on the primary winding. | ||
| View original record | X8710 By. from EFC. c. Hs. c. Hs/AJI. c. RV/RD. EFC1/AD31.10.29. X.8710. IGNITION COIL, TEMPERATURES AND CHARRING EFFECT ON PRIMARY WINDING. Further to our EFC1/AD16.10.29 and our EFC3/AD22.10.29, we… | ||
| scan0249 | Up-to-date literature and prices for battery ignition equipment for bench testing. | ||
| View original record | X. 8710. Roy. from EFC. EFC3/AD31.10.29. BATTERY IGNITION EQUIPMENT. Will you please obtain for us up-to-date information of battery ignition equipment marketed by :- (1) Messrs. Lucas (2) Messrs.… | ||
| scan0250 | Response regarding the examination of a dynamo and shunt coil for chassis 101-UF. | ||
| View original record | EFC. X8710. Hm/AVS16/KW31.10.29. 40/50 Chassis 101-UF. With reference to your EFC4/AD22.10.29, in which you stated that you would like to know if any examination of the dynamo was made when the above… | ||
| scan0251 | Instructions and test results for an experimental ignition coil, LS8. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 X8710. ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.7.C Order No.: WD 88. Customer's No. 11-11-29 Ignition coil LS8. This coil has the following experimental… | ||
| scan0252 | Coil endurance test failure, identifying a short circuit in the secondary layers as the cause. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (2) To Order No. WD88 (contd) Customer's No. a total of 1120 hrs running equivalent to approx '32000 miles running on a… | ||
| scan0253 | Request to obtain enamelled secondary wire for winding six experimental ignition coils. | ||
| View original record | X8710. Roy. from EFC. c. Ey. EFC1/AD12.11.29. X.8710. IGNITION COIL SECONDARY WIRE. Would you please obtain a small quantity of No.42 S.W.G. (.0040) enamelled secondary wire, from Messrs. McCleod,… | ||
| scan0254 | Letter from The M-L Magneto Syndicate Ltd. regarding coil ignition sets. | ||
| View original record | X8710. TELEGRAMS: 'CARLTON. COVENTRY.' TELEPHONE 5001-2-3 The M-L Magneto Synd. Ltd. VICTORIA WORKS, COVENTRY. REPRESENTATIVES AND AGENTS FOR HOME TRADE WITH MANUFACTURERS Birmingham T. T. Tripp,… | ||
| scan0255 | Letter from Delco-Remy & Hyatt Ltd. regarding an enquiry for ignition coils. | ||
| View original record | X8710 DELCO-REMY & HYATT LTD. Head Office & Works: Telegrams: DELREMYAT, CHURTON, LONDON. 111, GROSVENOR ROAD, LONDON, S.W.1. Telephones: FRANKLIN 6611-6. (6 LINES) [Stamp: THE SOCIETY OF MOTOR… | ||
| scan0256 | Secondary coil winding machines observed during a visit to Messrs. North's, with suggestions for future development. | ||
| View original record | Wor. from RFC. c. Hy. c. Ev. c. Sft. X.8710. EFC/AM4.11.29. SECONDARY COIL WINDING MACHINES. During our visit to Messrs.North's recently, we were shewn the small and very neat secondary winding… | ||
| scan0257 | The experimental testing and failure analysis of various ignition coils. | ||
| View original record | X.8710 15.11.29. X.8710 X.4501 EXPERIMENTAL IGNITION COILS. Standard type, but with paraffin wax paper in place of varnished paper. We have had three of these. One has failed in normal experimental… | ||
| scan0258 | List of instructed modifications for various coils, specifying the type of insulation to be used. | ||
| View original record | -2- Coil modifications instructed. L.C.3. instructed to be rewound with standard varnish paper with extra initial secondary layer insulation. Not yet received. L.C.2. instructed to be rewound with… | ||
| scan0259 | Request to obtain two different 12-volt ignition coils for observation of their performance and construction. | ||
| View original record | X8710. Roy. from EFC. EFC1/AD20.11.29. IGNITION COILS. Will you please obtain for our observation in the Electrical Exptl. Dept. the performance and particulars of construction, of the following two… | ||
| scan0260 | The experimental use of new ignition coil secondary wire from supplier McCleod and McCleod. | ||
| View original record | X8710 RHC. from EFC. c. Ry. c. Mr.Brock. EFC7/AD21.11.29. X.8710. IGNITION COIL SECONDARY WIRE. We are handing to Mr.Tooby a reel of ignition coil secondary wire obtained from McCleod and McCleod of… | ||
| scan0261 | That two ignition coils should be of the latest experimental L.C. type. | ||
| View original record | RHC. from EFC. c. Ry. c. Sft/Mr Brock. X8710 EFC1/AD26.11.29. X.8710. IGNITION COIL SECONDARY WIRE. Further to our EFC7/AD21.11.29, we omitted to say that the two coils instructed should be of the… | ||
| scan0262 | Tolerances of secondary wire for ignition coils from various suppliers. | ||
| View original record | EFC. X8710. BY/RD10/DM.27.11.29. Sizes of Secondary Wire. In view of the recent criticism of the closeness of the secondary winding on the ignition coil, we have been in communication with the… | ||
| scan0263 | Returned faulty ignition coils with short circuits and other available primary coils. | ||
| View original record | EFC. X.8710. BY/RD2/DM.30.11.29. X.8710 Ignition Coils. X4653 We send you herewith the following ignition coils which have been returned faulty and have been found to have short circuits in their… | ||
| scan0264 | Examination report on faulty ignition coils returned by customers. | ||
| View original record | RR 238 (150 BKS.) (DB 461-B-12-24) MP 306975 X8710. ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.7.C. Order No.: WD97. Customer's No.: X 8710 4-12-1929 Examination of faulty coils returned from customers. We… | ||
| scan0265 | Investigation report detailing the breakdown and faulty mechanical construction of two electrical coils. | ||
| View original record | RR 238 (150 BKS.) (OB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (2) To__________________________19__ Order No. WD97 (contd) Customer's No.____________ Coil No. B-6-C. Break down found at… | ||
| scan0266 | Instruction sheet detailing the investigation into overheating and short-circuiting electrical coils. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (3) To____________________ 19___ Order No. WD97 (contd) Customer's No.____________________ WH-65. ✓ We have also unwound two… | ||
| scan0267 | Request for two faulty standard ignition coils to be sent for examination. | ||
| View original record | X8710 By/RD. from EFC. EFC3/AD5.12.29. X.8710.. FAULTY IGNITION COILS. Will you please arrange to let us have two more standard coils (22 SWG. primary) which have been returned faulty, for our… | ||
| scan0268 | Supply of two types of ignition coils to Messrs. North for secondary winding. | ||
| View original record | X8710 RHC. from EFC. c. Sft/Mr Brock c. Ey. EFCB/AD5.12.29. X.8710. IGNITION COILS FOR SECONDARY WINDING BY MESSRS. NORTH. In accordance with Messrs. North's offer, it is our intention to send two… | ||
| scan0269 | Request for new finer primary ignition coils and the examination of coarser ones. | ||
| View original record | X8710 EFC. BY/RD1/DM.7.12.29. X.8710 Ignition Coils. We note your request for two more finer primary coils which we will arrange for, and also that the three coarser primary coils have been unwound,… | ||
| scan0270 | Two faulty ignition coils being sent for examination. | ||
| View original record | X8710 EFC. BY/RD3/DM.9.12.29. X.8710 Faulty Ignition Coils. Please receive herewith as requested 2 Coarse Primary coils which have failed, for examination. The coils are - VI-85 off chassis 40-FH.… | ||
| scan0271 | Examination report on faulty ignition coils returned from customers. | ||
| View original record | X8710. By/RD. from EFC. EFC5/AM.10.12.29. X. 8710. EXAMINATION OF FAULTY COILS. RETURNED FROM CUSTOMERS. In reply to your Ry/RD2/DM30.11.29 and your further enquiry, the following is Mr.West's report… | ||
| scan0272 | Instruction sheet detailing the examination of two faulty customer coils, identifying short circuits in the secondary winding. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8.12.24) MP 306975 X8710 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.T.C. Date 12-12-1929 Order No. WD101 Customer's No. X8710 Faulty customer's coils. We have unwound the following… | ||
| scan0273 | Instructions (page 2) investigating coil failure, suggesting mechanical stress on the insulating paper as the cause. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (2) 19 To Order No. WD101 (contd) Customer's No. insulating that layer to be unduly stressed mechanically. We have been… | ||
| scan0274 | Letter from Marelli Magnetos (England) Ltd. responding to an enquiry and enclosing product literature. | ||
| View original record | X8710. NOTE.—THE COMPANY IS NOT RESPONSIBLE FOR THEFT OR DAMAGE BY FIRE OR ANY OTHER CAUSE TO PROPERTY LEFT IN ITS CHARGE. CUSTOMERS' CARS ARE DRIVEN BY OUR STAFF AT CUSTOMERS' OWN RISK. DIRECTORS: A.… | ||
| scan0275 | Examination of faulty coils returned from customers, detailing a partial short circuit on the secondary winding. | ||
| View original record | X 8710. EV/RD. from EFC. EFC3/AD13.12.29. X.8710. EXAMINATION OF FAULTY COILS. RETURNED FROM CUSTOMERS. Further to our EFC5/AD10.12.29, we have now unwound the two coils NQ.95 and VI.85 after having… | ||
| scan0276 | Update to the standard coil drawing to prevent faults. | ||
| View original record | X8710 By/RD. from EFC. EFC4/AD16.12.29. X.8710. FAULTY COILS FROM CUSTOMERS. With reference to our EFC3/AD13.12.29 on the above subject, would you arrange on the standard coil drawing, to draw… | ||
| scan0277 | Ignition coil failures due to secondary winding overlap. | ||
| View original record | EFC. X8710 BY/RD2/DM.18.12.29. Ignition Coils. With reference to your memo, pointing out that failures occurred on 2 coils you examined. Where the 2nd layer of secondary winding was above the flexible… | ||
| scan0278 | Comparison and complete specification of test and measurements for experimental non-trembler ignition coils. | ||
| View original record | X 8710 X.3445. COMPARISON OF R.R. EXPERIMENTAL NON-TREMBLER IGNITION COILS X.8710 X.4501. Complete Specification of Test and measurements of Ignition Coils not intended for running on chassis. (1)… | ||
| scan0279 | Test procedures for an ignition coil, including temperature and resistance measurements. | ||
| View original record | -2- calculate from the increase in resistance as compared with the original resistance at the ambient temperature which should be noted, the temperature reached by the secondary winding. Note also the… | ||
| scan0280 | Page 3 of a testing procedure for an ignition coil, detailing high voltage and endurance tests. | ||
| View original record | -3- conditions allowed thus to remain for a period of 16 hours, following this the temperature of the coil shall again be arrived at from the measurement of the secondary resistance. (7) The coil… | ||
| scan0281 | Instruction for measuring the maximum voltage of a coil secondary using a sphere gap voltmeter. | ||
| View original record | X8710. -3a- To be inserted after (7) The maximum voltage put up by the coil secondary at the end of this period, i.e. with no flashing over the ends, shall be ascertained by means of sphere gap… | ||
| scan0282 | Page detailing endurance and destructive testing procedures for an ignition coil. | ||
| View original record | -4- on 5.5 mm. secondary gaps at supply voltages of 10 and 8, also of the maximum speeds at which the distributor can be run for each voltage to maintain regular sparking. (10) With the coil at… | ||
| scan0283 | Changes to the insulation of ignition coils for 20-HP & 40/50 HP chassis. | ||
| View original record | RHC. EFC. X 8710 BY/RD1/DM.31.12.29. Ignition Coils. 20-HP. & 40/50 HP. Chassis. Would you please arrange to let EFC. have 2 Ignition Coils which are standard in all respects, except that the… | ||
| scan0284 | Test schedule and construction details for an experimental coil. | ||
| View original record | X. 8710 23.12.29. TESTS OF EXPERIMENTAL COILS TO SCHEDULE. Type of coil :- X.No. 8710 Date 2-1-30 Coil No. L.I.2 Particulars of design and method of construction :- (a) Core. Std (b) Primary. Std (c)… | ||
| scan0285 | Test report on electrical windings, detailing resistance, impedance, and inductance measurements. | ||
| View original record | -2- (1) Continuity of windings :- OK. (2) Quantities :- Primary resistance .93 ohms at 14 °C. Secondary " 3910 " " 14 " Primary impedance at 50 cycles. 3.23. Secondary -ditto- 13750 Primary inductance… | ||
| scan0286 | Test results and failure analysis of a coil component, detailing resistance, temperature, and current measurements. | ||
| View original record | -3- (6) (a) Secondary resistance after test :- 6050 ohms. Corresponding temperature :- 151 °C. Primary current at end of test :- 1.90 amperes. Ambient temperature :- 16 °C. (b) Secondary resistance… | ||
| scan0287 | Test report page with numbered items for remarks, voltage, and gap measurements. | ||
| View original record | -4- (9) Remarks :- At 10 volts :- At 8 volts :- (10) Maximum gap and corresponding voltage. (11) Remarks:- (12) Remarks :- | ||
| scan0288 | Report page outlining remarks and the results of an examination of windings. | ||
| View original record | -5- (13) Remarks :- (14) Results of examination of windings. | ||
| scan0289 | Specification for two standard coils and their applicable date ranges and drawing numbers. | ||
| View original record | X8710 3.1.30. Standard coil D.71650 up to Dec. 2nd as drawing D.70759. Standard coil D.71650 from Dec. 2nd to Dec. 30th as drawing D.72428. EFC/HEW. | ||
| scan0290 | Testing, risks, and standardization of battery ignition coils. | ||
| View original record | By. from EFC. c. Wor. X8710 EFC5/AD3.1.30. X.8710. BATTERY IGNITION COILS. We have received the two ignition coils mentioned in the note By/RDL/DM31.12.29 as being made up with secondary insulation of… | ||
| scan0291 | Specifications for coil winding, including primary and secondary layers and insulation. | ||
| View original record | EFC5/AD3.1.30 contd. -2- Primary winding as on D.72428. 2 turns of .010 empire cloth over primary winding as base for secondary 2.850 wide. Joint of secondary winding to primary. start off with… | ||
| scan0292 | Test results and failures of insulation in battery ignition coils. | ||
| View original record | X8710. By. from EFC. c. Sft/Mr Brock. EFC4/ADL.1.30. X.8710. BATTERY IGNITION COILS. Further to our EFC5/AD3.1.30. in the course of the tests we have been making on the two special coils handed to us… | ||
| scan0293 | Test schedule report detailing the design and construction of an experimental coil. | ||
| View original record | X. 8710 23.12.29. TESTS OF EXPERIMENTAL COILS TO SCHEDULE. Type of coil :- X.No. 8710 Date 13-1-30 Coil No. L.I. 1. Particulars of design and method of construction :- (a) Core. Std as on Drawing… | ||
| scan0294 | Test results for electrical component windings, circuits, and quantities. | ||
| View original record | -2- (1) Continuity of windings :- OK (2) Quantities :- Primary resistance .92 ohms at 17 °C. Secondary " 4305 " " 17 " Primary impedance at 50 cycles. 3.29 " " Secondary -ditto- 13500 " " Primary… | ||
| scan0295 | Test sheet recording resistance, temperature, and current readings for a component. | ||
| View original record | -3- (6) (a) Secondary resistance after test :- 6680 ohms. Corresponding temperature :- 157 °C. Primary current at end of test :- 1.94 amperes. Ambient temperature :- 17.5 °C. (b) Secondary resistance… | ||
| scan0296 | Test report detailing voltage, RPM, gap measurements, and endurance test results. | ||
| View original record | -4- (9) Remarks :- At 10 volts :- 1890 r.p.m. At 8 volts :- 1360 r.p.m. (10) Maximum gap and corresponding voltage. .084" - 9200 volts. (11) Remarks:- Maximum gap .178 inches. (12) Remarks :- Run… | ||
| scan0297 | The examination of windings following a test failure. | ||
| View original record | -5- (13) Remarks :- Failed after 5 3/4 hrs on test. Symptoms - secondary short circuit (14) Results of examination of windings. Secondary winding in very good condition. Evenly wound with no evidence… | ||
| scan0298 | The testing of a Lucas ignition coil and the return of an M.L. and R.Bosch coil. | ||
| View original record | X8710. Roy. from EFC. EFC2/AD15.1.30. X.8710. LUCAS IGNITION COIL. Further to our EFC3/AD31.10.29 we duly received the Lucas ignition coil which we shall be using for test and examination. Will you… | ||
| scan0299 | Complaint of a coil failure on Chassis GGP-2. | ||
| View original record | X8710 BY c. EFC. c. SPT. EP/Thn20/H15.1.30. re. Failure of Coil. Chassis GGP-2. We have had a serious complaint from the owner of the above car Mr. Antweiler, who is Managing Director of Mulliners,… | ||
| scan0300 | Request to prepare an experimental ignition coil with a tapped secondary winding for voltage measurement. | ||
| View original record | X8710 Sft/Mr.Brock from EFC. c. By. EFC3/AM16.1.30. X.8710. IGNITION COIL WITH TAPPED SECONDARY WINDING FOR VOLTAGE MEASURMENT. Will you please prepare for us an experimental coil to O/54733 with… | ||
| scan0301 | The fitment of an improved ignition coil, No. L.I.5, for the 23-EX model. | ||
| View original record | X8710 RHC. from EFC. c. Hs/GWH. EFC2/AD20.1.30. X.8710. IGNITION COIL FOR 23-EX. Will you please arrange to have fitted to 23-EX, ignition coil No.L.I.5. which embodies several improvements in… | ||
| scan0302 | Construction of three ignition coils with different winding types. | ||
| View original record | X8710. EFC. from Mr.Brock. 27.1.30. Here-with three ignition coils. All of these have been wound and built up similar to the three new ones you have already had, viz. core built up in paxolin tube and… | ||
| scan0303 | Complete specification for testing and measuring experimental non-trembler ignition coils. | ||
| View original record | X8710 X.3445. COMPARISON OF R.R. EXPERIMENTAL NON-TREMBLER IGNITION COILS. Complete Specification of Test and measurements of Ignition Coils not intended for running on chassis. (1) Check metallic… | ||
| scan0304 | Test procedure for a coil, detailing temperature and resistance measurements under exaggerated operating conditions. | ||
| View original record | -2- immediately after the run and calculate from the increase in resistance as compared with the original resistance at the ambient temperature which should be noted, the temperature reached by the… | ||
| scan0305 | Detailed procedure for testing the performance and durability of an ignition coil. | ||
| View original record | -3- noting the ambient temperature. Subsequently, the contact breaker shall be stopped and allowed to remain on contact, the supply voltage reduced to 14.0, the supply of heat to the oven switched… | ||
| scan0306 | Page detailing testing procedures for an electrical coil, including performance, voltage, temperature and endurance tests. | ||
| View original record | -4- ascertained by means of sphere gap voltmeter. (8) Now check the final normal working current of the coil at 12 volts under standard conditions as previously observed in (4), and also the value of… | ||
| scan0307 | Page detailing endurance and breakdown testing procedures for an ignition coil. | ||
| View original record | -5- of approx. 17.5 under standard conditions, sparking on 6.5 m.m. third point spark gaps, the coil being given a two hours period of rest every 24 hours. (13) Assuming that the ignition coil has… | ||
| scan0308 | Experimental spirally wound iron core for an ignition coil. | ||
| View original record | X8710 RHC. from EFC. c. Mr.Brock. c. EV. EFC3/AD29.1.30. X.6013. IGNITION COIL WITH EXPERIMENTALLY X.8710. SPIRAL WOUND IRON CORE. A type of core construction which may have certain advantages in… | ||
| scan0309 | The examination of faulty ignition coils from Phantom and 20 HP chassis. | ||
| View original record | Mr Brock. c to EFC. X. 8710. Hm/SE4/MW10.2.30 re IGNITION COILS. We shall shortly be sending over for your examination a number of faulty ignition coils recently returned from various Phantom and 20… | ||
| scan0310 | Bench tests of production type ignition coils with different secondary insulations. | ||
| View original record | E.7.C. X, 8710 Date 11-2-30 Ref NO. WE4. X.NO. 8710 Present production type ignition coils wound to drg D72428. We have now completed a series of bench tests on two of these coils NOS. L.I.1 with… | ||
| scan0311 | Weaknesses and breakdowns in secondary coil windings during production. | ||
| View original record | W.E.4 (2) (Contd) the secondary and apparent scrupulous care in winding, the coils as going out on production are still weakest on the lower secondary layers. When we can force breakdowns to occur in… | ||
| scan0312 | Request to prepare an experimental ignition coil with tapped secondary windings for voltage measurement. | ||
| View original record | X8710. RHC. from EFC. EFC2/AML.E.30. X.8710. IGNITION COIL WITH TAPPED SECONDARY WINDING FOR VOLTAGE MEASUREMENT. Will you please arrange with Mr.Brock to prepare for us an experimental coil to… | ||
| scan0313 | Faulty coil from chassis 7-WR and its subsequent repair. | ||
| View original record | X.8710 40/50 H.P. c to Sft/Mr.Brock. c to EFC. Hm/AVS17/MW18.2.30. re CHASSIS 7-WR - "N" DEPT. We have today received from the above Department : 1. D.71650 Latest type Coil No.OP-85. with a complaint… | ||
| scan0314 | Faulty coil received from chassis 18-OR, which has been sent for repair. | ||
| View original record | DF. [DY. crossed out] c to Sft/Mr Brock. c to EFC X8710. 40/50 H.P. Hm/AVS18/MW18.2.30. re CHASSIS 18-OR - "N" DEPT. We have today received from the above Department: 1 D.71650 Latest type coil No.… | ||
| scan0315 | Faulty latest type coil, No.XH-75, from chassis 43-KR, sent to Mr. Brock for repair and remarks. | ||
| View original record | X8710 40/50 H.P. EY. c to Sft./Mr. Brock. c to EFC. Hm/AVS19/MW18.2.30. re CHASSIS 43-KR. - "N" DEPARTMENT. We have received from the above Department: 1. D.71650 Latest type coil No.XH-75 with a… | ||
| scan0316 | Faulty coil from chassis GXO-61, belonging to Hutchinson Haddow & Co. Ltd. | ||
| View original record | X8710 20 H.P. BY. [Struck through] c to Sft/Mr. Brock. [Struck through] c to EFC. Hm/AVS20/MW18.2.30 re CHASSIS GXO-61 - HUTCHINSON HADDOW & CO. LTD. We have today received from the above: 1. D.71650… | ||
| scan0317 | Examination report on faulty ignition coils returned from customers, detailing the cause of a short circuit. | ||
| View original record | E.7.C. X8710 Date 18-2-30 Ref NO. W.E.7 X.NO. 8710 Faulty ignition coils from customer's We have received for examination four ignition coils taken from a batch of sixteen received from Cricklewood.… | ||
| scan0318 | Analysis of coil failures, attributing them to a combination of mechanical stress and excessive voltage. | ||
| View original record | (2) W.E.7 [In margin: could] has been caused by mechanical stress of the paper under the conditions described above. However the voltage must also have been excessive as 3 turns of paper even under… | ||
| scan0319 | Urging the production of a special ignition coil with a tapped secondary winding for voltage measurement. | ||
| View original record | To RHC. from EFC. X.8710 EFC4/MS1 7.3.30. X.8710 Ignition Coil with tapped secondary winding for voltage measurement. May we please urge with you the production of this special coil instructed by our… | ||
| scan0320 | The use of coloured cottons to distinguish coil tappings. | ||
| View original record | X8710 To EFC. 21.3.30. EFC2/ADL1.2.30. Herewith coils as per your To distinguish the tappings I have used coloured cottons. Layer 2. 1 white cotton. " 4. 2 " " 6 3 " " 10 1 red " " 14 2 " " 18 3 " "… | ||
| scan0321 | Extract from Mr. Hancock's report on 14-GIV after 14,000 miles, detailing the condition of the ignition coil and distributor. | ||
| View original record | X7710 5.4.30. Extract from Mr.Hancock's report on 14-GIV after 14,000 miles X5690 IGNITION COIL L.I.7. WOUND ON TUBE WITH PARALLEL SECONDARY WINDING. DISTRIBUTOR WITH MODIFIED CONTACT POINT ARM There… | ||
| scan0322 | Extract from a report on the performance of an ignition coil and distributor after mileage tests. | ||
| View original record | X8710 28.4.30. Extract from Mr.Hancock's report dated 12.3.30. on 14-GIV. after 5,000 miles. X5690 Ignition coil L.I.7. wound on tube with parallel secondary winding. Distributor with modified contact… | ||
| scan0323 | Specifications for two experimental ignition coils with tapped secondary windings for voltage measurement. | ||
| View original record | Memo from EFC. c. Sft/Mr.Brock. c. Ry. X8710 EFC5/AM 7.5.30. X.8710. IGNITION COIL WITH TAPPED SECONDARY WINDING FOR LAYER VOLTAGE MEASUREMENT. X6014. Our preliminary experiments with the ignition… | ||
| scan0324 | Voltage measurements taken on an old type ignition coil with different secondary winding connections. | ||
| View original record | X8710 WE.25. 19.5.30. X.8710. X.918. VOLTAGES ON IGNITION COIL WINDINGS. Measurements of the primary voltage of an old type ignition coil with an insulated secondary have been made with the inside end… | ||
| scan0325 | Failures, investigations, and recent specification improvements related to ignition coils. | ||
| View original record | X8710 W/S. To C. from EFC. C. WOT. C. EP. EFCB/AD20.5.30. X.8710. IGNITION COILS. We have received your C8/C19.5.30 and are pleased to have some first-hand evidence of a descriptive nature regarding… | ||
| scan0326 | Intermittent ignition failure on a 20 HP Chassis GYL-61, requesting the faulty parts for examination. | ||
| View original record | X8710 W/N. To A. from EFC. EFC3/AD28.5.30. X.8710. 20 HP. CHASSIS GYL-61. IGNITION COIL. We have received a note from Mr.Cowen ref. C8/C19.5.30 remarking that as a result of intermittent battery… | ||
| scan0327 | Requesting different types of ignition coils for testing purposes. | ||
| View original record | X8710 To RHC. from EFC. EFC2/AD14.8.30. X.4100 X.8710 X.6013. IGNITION COILS. We should like to have as soon as possible to enable us to proceed with tests, the following ignition coils :- Ignition… | ||
| scan0328 | Request from EFC to Mr. Brock to have a standard secondary winding wound on a coil. | ||
| View original record | X8710. Mr. Brock. from EFC. EFC3/AD2.9.30. Will you please have a standard secondary winding wound on coil handed to you herewith. Order No.54733. EFC. H | ||
| scan0329 | Unsatisfactory Delco Remy ignition coil tests and failure rates. | ||
| View original record | S/W X8710 To HPS. from Sg. Copy to R. Hor. By E. Hs. re Delco Remy Ignition Coil. Sg11/EM.1.12:00 X8710 X8712 Hs I was interested to read EPCL/AD24.12.30 relative to the above and the rather… | ||
| scan0330 | Coil failures and comparing service complaint methods with Cadillac. | ||
| View original record | X8710 To Sg. from Hs. c. Wor. c. EY c. EFC. Hs2/MJL.1.31. X.8710 X.6036. COIL FAILURES X.918. The question of coil failures was brought up in U.S.A. by the Derby quarterly complaint sheet. R.R.Inc.… | ||
| scan0331 | Investigation into an ignition coil failure from chassis GLN-15 which only occurs when hot, suspecting the synthetic casing material. | ||
| View original record | X8710 [Stamp]: RECEIVED 17 DEC 1930 SH CFC To Sft/Mr.Brock. BY/RD4/W.1-1-31. X8710. X5783 RE :- IGNITION COILS. We have read your report on the Ignition Coil from Chassis No.GLN-15,and note that in… | ||
| scan0332 | Use of bone grey fibre and spring clearance for a slipper flywheel. | ||
| View original record | To E. HS. from R. c. to CJ. RG. DA. BY. X. 627 X4646 R3/M3.4.24. SLIPPER FLYWHEEL. X. 627 Mr. Olley says - "that for the above - they find Bone grey fibre the best material". I think if we use a thin… | ||
| scan0333 | Requesting samples of Bone Gray Fibre for a Slipper Flywheel and other components. | ||
| View original record | X 4626 EWI c. Hs. BY/HM8/H. 12. 4. 24. SLIPPER FLYWHEEL. Mr.Olley says that for the above they find Bone Gray Fibre the best material, and we shall be pleased if you will kindly write to R.R. of A.… | ||
| scan0334 | Sourcing 'Bone Grey' American fibre as a potential new material for contact breaker rubbing blocks. | ||
| View original record | X.4646 To Wd. from EFC. EFC3/T1.5.24. X.4357 - RE MATERIAL FOR CONTACT BREAKER RUBBING BLOCKS. Mr. Olley has informed us that American fibre known as Bone Grey, the first word referring to the… | ||
| scan0335 | Requesting comparative machining tests on a new 'bone grey' fibre for a Goshawk distributor. | ||
| View original record | To RHC. from EFC. X4646 EFC6/T19.5.24. X.4357 - GOSHAWK DISTRIBUTOR. This is to confirm we have handed to you a piece of 'bone grey' fibre. It is not certainly known at present whether this is any… | ||
| scan0336 | Confirming the handover of two Goshawk Distributor Rockers and reporting on machining tests of a new fibre material. | ||
| View original record | X.4646 To EFC from RHC. RHC/LS.2.6.24. X. 4646 This is to confirm having handed to you, two Goshawk Distributor Rockers fitted with Grey fibre blocks made from the piece of fibre which you supplied.… | ||
| scan0337 | Fitting and testing a 'bone-grey' fibre rubbing block on battery ignition distributors. | ||
| View original record | X4646 To RHC. from EFC. c. Hs/TMW. C. HK/G.WH. EFC2/T12.6.24. X.4357 - BATTERY IGNITION DISTRIBUTOR. Herewith we hand you a standard battery ignition contact breaker lever which you recently fitted… | ||
| scan0338 | Letter regarding the testing of a Bone Grey Fibre sample, recommended by Rolls Royce of America, for use as rubbing blocks. | ||
| View original record | X4646 BY/HM2/K. 18.6.24. EFC. We are sending you herewith a sample of Bone Grey Fibre which has been recommended to us by Rolls Royce of America. We do not know whether you have had samples of this… | ||
| scan0339 | The testing of Bone Grey Fibre against the currently used Red Fibre. | ||
| View original record | 44646 BY/HM1/K. 27.6.24. Hs. RE BONE GREY FIBRE RECOMMENDED BY R.R. OF A. Kindly note we have tested a sample of Bone Grey Fibre against our present Red Fibre, by placing a piece in water, and after… | ||
| scan0340 | Comparing bone grey fibre to red fibre and Continental Bakelite, noting moisture issues on 20 HP models. | ||
| View original record | R.R. 496A (20H) (D.A. 652 20-3-24) J.H.D. +4646 EXPERIMENTAL REPORT. Expl. No. REF Hs4/LG30. 6.24. X2738 +4646 To R. from Hs. c. to CJ. RG. c. to E. DA. c. to BY. WOR. BONE GREY FIBRE. We find that… | ||
| scan0341 | The completion of jobs for contact breaker levers and machining tests on bone grey fibre. | ||
| View original record | X4646 To RHC. from EFC. EFC1/T9.7.24. X.4357 - CONTACT BREAKER LEVERS WITH BONE GREY FIBRE BLOCKS FOR 9-PK & 6-GII AND MACHINING TESTS ON SECOND SAMPLE OF BONE GREY FIBRE. We should be glad if you… | ||
| scan0342 | Three sample Make and Break Cam Followers made from American Bone Grey Fibre, comparing them to the existing red fibre. | ||
| View original record | X. 4646. EFC. BY1/H. 13.8.24. We are handing you herewith three sample Make and Break Cam Followers supplied to us by America, made in Bone Grey Fibre. We understand that you are testing these out,… | ||
| scan0343 | Wear test report on a bone grey fibre rubbing block, detailing a 10,000 mile equivalent run. | ||
| View original record | RR 238 (150 BKS.) (SH57.29-8-20.) MP 224358 X. 4646. ROLLS-ROYCE LTD. INSTRUCTIONS. IL To E.F.G. Order No. W.A. 63. Customer's No. X 4646. Date 15 - 7 - 1924 Wear test on Bone grey fibre rubbing… | ||
| scan0344 | Material wear dimensions after a 10,000-mile test. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. RR 238 (150 BKS.) (SH57-28-6-20.) MP 224358 To Order No. W.A. 63 (2) Customer's No. Dimensions after 10,000 miles. top .253" middle .254" bottom .255" Maximum amount of… | ||
| scan0345 | The unapproved transfer of a distributor breaker lever between vehicles and the resulting record-keeping issues. | ||
| View original record | 14646 To RHC. from EFC. EFC2/T13.8.24. X.2894. TUNGSTEN CONTACT POINTS. X.4357. BONE GREY FIBRE RUBBING BLOCKS . We note from your RHC1/LS24.7.24, that the distributor fitted with contact breaker… | ||
| scan0346 | Machining tests and material sources for bone grey fibre rubbing blocks for battery ignition. | ||
| View original record | X. 4646 To RHC. from EFC. EFC5/T13.8.24. X.4357 - BONE GREY FIBRE RUBBING BLOCKS FOR BATTERY IGNITION. The rubbing blocks which we have at present on test were made from the first sample of bone grey… | ||
| scan0347 | Comparing the machining and wearing properties of two Bone Grey Fibre rubbing block samples. | ||
| View original record | To EFC.from RHC. X.4646 RHC4/LS.21.8.24. X.4646 RE - BONE GREY FIBRE RUBBING BLOCKS. With reference to your EFC5/T13.8.24, in which you query our remarks on the machining properties of the Bone Grey… | ||
| scan0348 | Hygroscopic test comparing the moisture absorption of Bakelite and Bone grey fibre. | ||
| View original record | RR 238 (150 BKS.) (SH57. 29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.B. Order No. W.A 74 Customer's No. X.4646 X4357 Hygroscopic test of ~~first~~ 2ND sample of Bone grey fibre This test… | ||
| scan0349 | Comparison of water absorption by weight between Bakelite and Bone grey fibre after immersion. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. RR 238 (150 BKS.) (SH57. 29-6-20.) MP 224358 19 Order No. WA 74 (2) Weight of Bakelite before immersion = 1.179 grammes Weight of Bone grey fibre before immersion =… | ||
| scan0350 | Fitting experimental bone grey fibre rubbing blocks to cars 98-NK, 44-PK, or 5-EX. | ||
| View original record | X.4646 To RHC. from EFC. fr EFC1/T27.8.24. X.4646 - BONE GREY FIBRE RUBBING BLOCK. Herewith we hand to you two battery ignition contact breaker levers which you recently fitted with bone grey fibre… | ||
| scan0351 | Bone Grey Fibre Rubbing Block, part number X.4646. | ||
| View original record | To EFC.from RHC. X4646 RHC2/LS.28.8.24. X.4646 - BONE GREY FIBRE RUBBING BLOCK. With reference to your EFC1/T27.8.24, we have fitted Contact Breaker Lever 2C. to Chassis 98-NK, and Lever 2D, to… | ||
| scan0352 | Instruction sheet detailing the results of a wear test on an unlubricated rubbing block. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To E.F.G. Order No. W.A 88 Customer's No. X 4646 Wear test on Bone grey rubbing block (1st sample) unlubricated. A 10,000 mls run on our rig has now been completed with… | ||
| scan0353 | Investigation into material swelling due to its hygroscopic properties, confirmed by a heating test. | ||
| View original record | RR 238 (150 BKS.) (SH57. 29-6-20.) MP 224356 ROLLS-ROYCE LTD. INSTRUCTIONS. 19 To Order No. Wa 988(2) Customer's No. that the wear has been nil, but it is considered that the material has swollen… | ||
| scan0354 | The supply of contact breaker levers and a new bone grey fibre material for rubbing blocks. | ||
| View original record | x4646 To RHC. from EFC. EFC1/T21.10.24. X.4646. BONE GREY FIBRE FOR RUBBING BLOCKS. Herewith we hand to you battery ignition contact breaker levers as follows :- One marked 25 already fitted with Bone… | ||
| scan0355 | Fitting a second sample of bone grey fibre rubbing blocks to contact breaker levers. | ||
| View original record | x4646 To RHC. from EFC. EFC7/T27.10.24. X.4646. BONE GREY FIBRE FOR RUBBING BLOCKS (SECOND SAMPLE) Further to our EFC1/T21.10.24, we now hand to you the two contact breaker levers which you recently… | ||
| scan0356 | The mileage tests of bone grey fibre rubbing blocks. | ||
| View original record | X.4646. To EFC3/T28.10.24. X.4646. MILEAGES OF BONE GREY FIBRE RUBBING BLOCKS TO DATE. 1st Sample. 3841 miles on 6-GII. 1st.Sample. on 98-NK in France - 2nd.Sample. 2876 miles on 5-EX. EFC. | ||
| scan0357 | Instruction sheet detailing the wear results of a bone-grey fibre rubbing block after a road test. | ||
| View original record | RR 238 (150 BKS.) (SH57.29-6-20.) MP 224358 X. 4646. ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.B. 8-12-1924 Order No. WA97 Customer's No. X4646 Bone-grey fibre rubbing block (Second sample) NOZC on 98NK.… | ||
| scan0358 | 10,000-mile bench test of a contact breaker lever with a bone grey fibre rubbing block. | ||
| View original record | RR 238 (150 BKS.) (SH57. 29-6-20.) MP 224358 X4646 2 UL' ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.b. Order No. WA 98 Customer's No. X4646 10,000 miles bench test of contact breaker lever fitted with Bone… | ||
| scan0359 | Inspection report detailing the unsatisfactory condition of platinum points and rust found inside a distributor after 5000 miles. | ||
| View original record | RR 238 (150 BKS.) (SH57. 29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To 19 Order No. WA 98 (2) Customer's No. The condition of the platinum points was considered to be unsatisfactory, it being… | ||
| scan0360 | Instruction sheet detailing the wear test results for a bone grey fibre rubbing block after a 10,000-mile test. | ||
| View original record | RR 238 (150 BKS.) (SH57.29-6-20.) MP 224358 X 4646 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.F.b Order No. Wa99. Customer's No. X 4646 Bone grey fibre rubbing block on 9PK. (First sample) This car has… | ||
| scan0361 | Electrical experimental record sheet for a Bone Grey Fibre rubbing block test sample. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS. X 4646 Bone Grey Fibre rubbing block (1ST sample) Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading Finis[h]ed. | Miles covered.… | ||
| scan0362 | Electrical experimental record sheet for a bone grey fibre rubbing block. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS. Bone grey fibre rubbing block NO 2D (2ND Sample) X 4646 | Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles… | ||
| scan0363 | Electrical experimental record sheet for a bone grey fibre rubbing block test. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS. (2ND Sample) Bone grey fibre rubbing block NO. 2E. X.No. 4646. [Column Headers] Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles… | ||
| scan0364 | Electrical experimental record sheet for a bone grey fibre rubbing block. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS. Bone grey fibre rubbing block No T2 (2ND Sample) X NO. 4646 Date on. Location. Date off. REMARKS. Miles reading start. Miles reading finish. Miles covered. Total… | ||
| scan0365 | Mileage report for bone grey fibre rubbing blocks on experimental cars. | ||
| View original record | EFC. 2.1.25. X.4646. BONE GREY FIBRE RUBBING BLOCKS. -------------------------------------- The mileage of the above on expl. cars to date is as follows :- Chassis. Sample Material. Miles run.… | ||
| scan0366 | List of experimental ignition parts removed from chassis 93-NK before completing 10,000 miles. | ||
| View original record | X4646 EFC. 23.2.25. EXPERIMENTAL IGNITION PARTS ON 93-NK. The following parts were on 93-NK as experimental items before this chassis was dismantled and have not yet completed 10,000 miles. Bone grey… | ||
| scan0367 | Electrical experimental record sheet for a Bone Grey Fibre rubbing block test. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS. X 4646 10 Bone Grey Fibre rubbing block NO 2C (2nd Sample) Date on. Location. Date off. REMARKS. Miles reading start. Miles reading finish. Miles covered. Total… | ||
| scan0368 | Electrical experimental record sheet for the testing of a bone grey fibre rubbing block. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS. X 4646 Bone grey fibre rubbing Block. (1st Sample) Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. |… | ||
| scan0369 | Electrical experimental record sheet for a bone grey fibre rubbing block sample. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS. X4646 12 Bone grey fibre rubbing Block. (1ST Sample) Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered.… | ||
| scan0370 | Electrical experimental record sheet for a bone grey fibre rubbing block sample. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS 13 Bone grey fibre rubbing block NO T3 (2nd Sample) X No. 4646 Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles… | ||
| scan0371 | 10,000-mile bench test report on a standard Goshawk distributor, examining a new rubbing block and platinum points. | ||
| View original record | X 4646 EFC. WA.113. X.4646. X.4357. X.4652. 23.25. 10,000 MILE BENCH TEST OF STANDARD GOSHAWK DISTRIBUTOR, FITTED WITH NEW POSITIVE EARTHING CONNECTION, BONE GREY FIBRE (2nd SAMPLE) RUBBING BLOCK AND… | ||
| scan0372 | Analysis and inspection of a deposit found on metal parts susceptible to oxidation. | ||
| View original record | -2- Contd. to react on the exposed metal parts susceptible to such osidation. A sample of this deposit has been handed to Mr. Gall for analysis and the distributor has been in Mr. Davis' office for… | ||
| scan0373 | 16,000-mile test in France for vehicle 93-NK, detailing electrical component wear. | ||
| View original record | X4646 Extract from GWH3/CRN28.4.25 x8680 x8940 Report from France on 16,000 Mile Test of 93-NK. Condenser earth connection to D. scheme 254 - battery points are badly pitted again. Should not consider… | ||
| scan0374 | The mileage performance of various samples of bone grey fibre rubbing blocks. | ||
| View original record | X.4646 EFC. 18.5.25. X.4646. MILEAGES TO DATE OF BONE GREY FIBRE RUBBING BLOCKS. 2nd Sample No.2E - 8684 miles (8-GII). " " " 2D - 9220 " (5-EX). " " " T₂ - Considerably over 10,000 miles (93-NK). 1st… | ||
| scan0375 | Chassis 93-NK after 15,447 miles in France, detailing issues with the magneto and battery ignition. | ||
| View original record | X4646 Extract from GWH2/Crn20.5.25. REPORT ON CHASSIS 93-NK after 15,447 MILES (IN FRANCE) X4181d Magneto has been dismantled and we found the H.T. brush stuck right up in the holder, which has caused… | ||
| scan0376 | Requesting the fitting of bone grey fibre rubbing blocks and springs to contact breaker levers. | ||
| View original record | To RHC. from EFC. X4646 EFC4/T3.6.25. X.4646. BONE GREY RUBBING BLOCKS. Herewith we hand to you two contact breaker levers which we have just been fitted with new platinum points. Would you please… | ||
| scan0377 | Request for the return of a contact breaker lever for examination and standardisation purposes. | ||
| View original record | X4648 Expl. Dept., Messrs. Rolls-Royce Ltd., Derby. Angleterre EFC2/T12.6.25. Hotel de France, Chateauroux, Indre, France. Mr. Hancock from EFC. When you cleaned the condenser connections on 93-NK and… | ||
| scan0378 | Letter sent from France confirming a bone grey fibre is being sent and that a screw with a burnt contact point has been lost. | ||
| View original record | x4646 Hotel de France, Chateauroux, Indre. France. June 15th, 1925. To: "E.F.C" From: G.W.Hancock. With reference to your letter of the 12th inst., ref. EFC2/T., we are sending you, herewith, the bone… | ||
| scan0379 | The mileage and wear of an experimental bone grey fibre rubbing block and AS tungsten points. | ||
| View original record | X4646 EFC. 19.6.25. WB.22. X.2894. X.4646. BONE GREY FIBRE RUBBING BLOCK (1ST SAMPLE) AND AS TUNGSTEN POINTS OFF 6-GII. The total mileage of these two experimental items is as follows . Bone grey… | ||
| scan0380 | The wear of a bone grey fibre rubbing block after testing on car 5EX. | ||
| View original record | RR 238 (150 BKS.) (SH57.29-6-20.) MP 224358 X. 4646. ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.B. Order No. WB 25 Customer's No. X 4646 Bone Grey fibre rubbing block NO 2D (2nd sample) on 5 EX This… | ||
| scan0381 | Test report on a bone grey fibre rubbing block after 10,090 miles of use. | ||
| View original record | RR 238 (150 BKS.) (SH57.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.F.b Order No. W320 Customers No. X4646 Bone grey fibre rubbing block (2ND Sample) NO2E fitted to standard lever on 8 G… | ||
| scan0382 | Test report on the wear of a bone grey fibre rubbing block after running over 1000 miles. | ||
| View original record | X 4646 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.C. Order No. WB 21 Customer's No. X 4646 Bone grey fibre rubbing block (2ND Sample) NO T2 off 93NK This lever and rubbing block has run considerably over… | ||
| scan0383 | Test log for battery ignition rubbing blocks, detailing material, wear, and conditions. | ||
| View original record | X.4646 X.4646 BATTERY IGNITION RUBBING BLOCK TESTS. | Date. | Test No. | Material. | Bench or chassis. | Equiv. miles. | Wear. | Remarks. | |---|---|---|---|---|---|---| | 30-10-22 | 1 | Continental… | ||
| scan0384 | Test report on battery ignition rubbing blocks. | ||
| View original record | X.4646. BATTERY IGNITION RUBBING BLOCK TESTS. Date. | Test No. | Material | Bench or Chassis. | Equiv. miles. | Wear | Remarks. 8.12.24. | 10 | Bone grey fibre. (2nd. samp) | 98-NK. | 14,800 | .007" |… | ||
| scan0385 | The testing and supply reliability of bone grey fibre for rubbing blocks. | ||
| View original record | X4646 To Wd. from EFC. C R Hall EFC2/T1.7.25. X.4646. BONE GREY FIBRE FOR RUBBING BLOCKS. About a year ago you obtained for us two samples of bone grey fibre, a portion of each of which is handed to… | ||
| scan0386 | Cover letter forwarding information about bone grey fibre for rubbing blocks. | ||
| View original record | X.4646 EFC. Wd/Msll/P.1.7.25. X.4646. BONE GREY FIBRE FOR RUBBING BLOCKS. In reply to yours EFC2/T.1.7.25, we attach hereto a copy of a letter we received from The Diamond Fibre Co. dated June 20th… | ||
| scan0387 | Letter from Diamond Fibre Co. Ltd. regarding the supply and pricing of 'Whalebone Fibre' for friction washers. | ||
| View original record | COPY OF LETTER. Ref. JJ/AM. 20th June 1924. Messrs. Rolls-Royce Ltd., Derby. Dear Sirs, We thank you for your letter of 19th instant (Roy/Ms15/DB19624) in which you advise us that you are particularly… | ||
| scan0388 | Tests of contact breaker rubbing block material, and in particular of Bone Grey Fibre. | ||
| View original record | To R & E. from EFC. c. CJ. & FN. c. Da. By. c. Wcr. Rg. c. Wd. X4646 EFC3/T1.7.25. X.4646 - TESTS OF CONTACT BREAKER RUBBING BLOCK MATERIAL - AND IN PARTICULAR OF BONE GREY FIBRE. The up to the… | ||
| scan0389 | The testing and comparison of bone grey fibre against continental bakelite, recommending its standardisation. | ||
| View original record | -2- Contd. A considerable number of tests on these various materials has been made, the results of which are detailed below. Though it is a fact that the bone grey fibre is more susceptible to… | ||
| scan0390 | Hygroscopic and wear tests comparing bakelite and bone grey fibre. | ||
| View original record | EFCs/T1 7.25. -3- Contd. Test No.O. 15.7.24. Hygroscopic test of bone grey fibre (2nd. sample) My assistant's report runs as follows :- "This test consisted of a comparison between bakelite and bone… | ||
| scan0391 | Wear tests on continental bakelite and bone grey fibre components. | ||
| View original record | EFC3/T1.7.25. -4- Contd. Test No.4. 6.6.23. Bench tests for wear of continental bakelite WITH cam lubricated. Equivalent miles run 10,000. Wear observed .004" Test No.5. 31.1.24. Bench tests for wear… | ||
| scan0392 | Test report detailing wear results for first and second samples of bone grey fibre. | ||
| View original record | EFC3/T1.7.25. -5- Contd. Test No.10. 8.12.24. Bone grey fibre (second sample) run on 88-NK 14,800 miles under severe chassis conditions in France. Wear .007". Condition of block quite satisfactory.… | ||
| scan0393 | Materials test report detailing wear on two samples of bone grey fibre. | ||
| View original record | Contd. -6- EFC3/T1.7.25. Test No.16. 17.6.25. Bone grey fibre (second sample) Run on chassis GF.68 and 8-CIII for 10,090 miles under normal chassis conditions. Maximum wear .012" Test No.18. 17.6.25.… | ||
| scan0394 | Confirming the standardisation of a battery ignition contact breaker rubbing block for the 'Phanton' and 20 HP models. | ||
| View original record | To Hs. from BJ. BJl/Hll.8.25. X4646 Standardisation Sheet No. 4646. "Phanton" and 20 HP. The battery ignition contact breaker rubbing block of bone grey fibre is agreed. The standardisation sheet will… | ||
| scan0395 | Standardisation of the battery ignition contact breaker rubbing block of bone grey fibre. | ||
| View original record | RR 755 (10M) (SL391 2-11-23) MP 281297 X.4646 COMPLETED 14.8.25. STANDARDISATION of CHASSIS PARTS. Date 21.7.25. Description of Parts. BATTERY IGNITION CONTACT BREAKER RUBBING BLOCK OF BONE GREY… | ||
| scan0396 | Request to conduct machining tests on samples of bone grey fibre and bakelite block received from Spauldings Ltd. | ||
| View original record | X 4646 To RHC. from EFC. EFC/T9.10.25. Herewith samples of bone grey fibre and bakelite block received from Spauldings Ltd., We should be glad if you would carry out machining tests on these two… | ||
| scan0397 | Extract concerning Bakelite insulating materials and Bone Grey Fibre. | ||
| View original record | X4646 Extract from EFC1/T2.11.25. X.3513. BAKELITE INSULATING MATERIALS & BONE GREY FIBRE. "As regards the bone grey fibre (from Spauldings), this was found to be almost identical with the material… | ||
| scan0398 | Colour variation in bone grey fibre used for production and arranging for comparison samples. | ||
| View original record | To EY+ from EFC. c. BY/RD. X 4646 EFC2/T2.11.25. X.4646 - BONE GREY FIBRE. The bone grey fibre actually being used on production appears to be darker in colour than the sample upon which most of the… | ||
| scan0399 | The replacement of contact breaker lever rubbing blocks with bone grey fibre. | ||
| View original record | X4646 To RHC. from EFC. EFC2/T9.4.26. X.4646 - BONE GREY FIBRE. We hand you herewith contact breaker levers together with a sample of bone grey fibre from Messrs. Spaldings. Would you kindly replace… | ||
| scan0400 | Supply and modification of battery ignition contact breaker levers. | ||
| View original record | X2646 To RHC. from EFC. EFC/T15.5.26. Herewith we hand you one dozen battery ignition contact breaker levers, tungsten point fitted, and four ditto (on wire), platinum point fitted. We should be glad… | ||
| scan0401 | Replacement of Continental bakelite rubbing blocks with bone grey fibre rubbing blocks on three battery ignition contact breaker levers. | ||
| View original record | To RHC. from EFC. X4646 EFC4/T8.9.26. Herewith we hand to you three battery ignition contact breaker levers at present fitted with Continental bakelite rubbing blocks. We shall be pleased if you will… | ||
| scan0402 | Test report on the wear characteristics of Spaulding's bone grey fibre material used for contact breaker lever rubbing blocks. | ||
| View original record | RR 238 (150 BKS.) (SH57.29-6-20.) MP 224358 X 4646 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.B. Order No. WB105 Customer's No. X 4646 Date 24-9-1926 Spaulding's bone grey fibre We have now completed two… | ||
| scan0403 | Instruction note rejecting 'Spaulding's' material for production due to excessive wear. | ||
| View original record | RR 238 (150 BKS.) (SH57. 29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To ________________________________________ 19 Order No._________________ Customer's No._________________ Average wear for… | ||
| scan0404 | Electrical experimental record sheet for a contact breaker lever fitted with Spaulding's Fibre. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS. X. No:- 4646 contact breaker lever fitted with Spaulding's Fibre. Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. |… | ||
| scan0405 | The inferior wearing qualities of bone grey fibre following a 10,000-mile test on a chassis in France. | ||
| View original record | To BY. from EFC. c. Wd. X 4646 EFC1/T25.9.26. X.4646 - BONE GREY FIBRE Referring back to our EFC1/T2.11.25, and particularly with reference to bone grey fibre, the 10,000 mile test of the bone grey… | ||
| scan0406 | Confirming the continued use of 'Whalebone' material for the contact breaker arm rubbing block. | ||
| View original record | Handwritten: X4646 EFC. c. to Wd. BY/Cgh3/G.27.9.26. Handwritten: 9-0 28/9/26 X.4646 - BONE GREY FIBRE. Handwritten: Bakelite With reference to EFC1/T25.9.26. when we changed from red fibre [red is… | ||
| scan0407 | Request to fit six battery ignition contact breaker levers with bone grey fibre rubbing blocks. | ||
| View original record | X4646 To RHC+ from EFC. EFC2/T4.11.26. X.4646 - BONE GREY FIBRE.RUBBING BLOCKS. Herewith we hand to you six battery ignition contact breaker levers which have been fitted with tungsten points. We… | ||
| scan0408 | The fitting of bone grey fibre rubbing blocks to contact breaker levers. | ||
| View original record | X4646 To RHC. from EFC. EFC5/T25.11.26. BONE GREY FIBRE RUBBING BLOCKS We hand you herewith four more contact breaker levers. Will you kindly XXXX add these to the six which we have already handed to… | ||
| scan0409 | Request for a sample of bone grey fibre for use in contact breakers and for third-party testing. | ||
| View original record | To RHC. from EFC. X 4646 EFCl/T3.12.26. BONE GREY FIBRE. X. 4646. We should like to have a small piece of bone grey fibre from the supply which we have given you for fitting up 10 contact breakers… | ||
| scan0410 | The performance of bone grey fibre for battery ignition rubbing blocks, with a sample provided for comparison. | ||
| View original record | X4646 To Wd. from EFC. EFC2/T4.12.26. X.4646. BONE GREY FIBRE. X8796 Herewith we hand you a piece of the bone grey fibre from which we have made a number of rubbing blocks for the battery ignition,… | ||
| scan0411 | Sample of Whale Bone Grey Fibre for material trial. | ||
| View original record | X4646 To EFC. BY/EM8/K. 20. 12. 26. WHALE BONE GREY FIBRE. As requested we are handing you herewith one piece of the above material which is taken from our stock and represents the type of material we… | ||
| scan0412 | Comparison of two samples of bone grey fibre and suggesting a Brinnell test. | ||
| View original record | To HIC. from EFC. X4646 EFC4/T21.12.26. BONE GREY FIBRE. X.4646. Herewith we hand to you two samples of bone grey fibre. The long piece is a sample taken from present production and the other is our… | ||
| scan0413 | Comparison of scleroscope hardness tests on experimental and standard grey fibre samples. | ||
| View original record | X4646 To EFC. FROM RHC. RHC1/BE.4.1.27. RE BONE GREY FIBRE -X.4646 With reference to EFC4/T.21.12.26. and samples of grey fibre attached. We cannot measure the brinell hardness test but have taken a… | ||
| scan0414 | Request to fit six standard tungsten contact breaker levers with rubbing blocks of bone grey fibre. | ||
| View original record | Y4646 To RHC. from EFC/HEW. EFC/HEW1/T14.6.27. Would you kindly have the six tungsten contact standard breaker levers herewith fitted with/rubbing blocks of bone grey fibre. We do not require springs.… | ||
| scan0415 | Inquiring about the consistency of bone grey fibre used for battery ignition contact breaker rubbing blocks. | ||
| View original record | X4646. Roy/Ms. from EFC. EFC4/ADL 7.6.30. X.4646. BONE GREY FIBRE FOR BATTERY IGNITION CONTACT BREAKER RUBBING BLOCKS. We are anxious to ascertain that the material used for the rubbing blocks of the… | ||
| scan0416 | Confirming the quality and source of bone grey fibre for battery ignition contact breaker rubbing blocks. | ||
| View original record | HEW X4646 EFC. FROM ROY. ROY/MS8/P.18.6.30. X.4646. BONE GREY FIBRE FOR BATTERY IGNITION CONTACT BREAKER RUBBING BLOCKS. In reply to yours EFC4/AD.17.6.30., the Whalebone Fibre used for the above is… | ||