Rolls-Royce Archives

Rolls-Royce Experimental Archives: Box ExFiles\Box 166\2\        Box Selection

IdentifierEntry
img001 Complaining about experimental C.A.V. voltage regulators not meeting the specified current.
View original record Roy. From Hs/Wst. c. to G/MT. c. to D/BP. 16092. Hs/Wst.5/MA.8.5.35. EXPERIMENTAL C.A.V. VOLTAGE REGULATORS. We recently requistioned from you two C.A.V. regulators to operate at a current of…

img002 Letter to Scintilla, Ltd. detailing required alterations to a dynamo regulator.
View original record Chassis dynamo regulator A6092. Hs/Wst.2/MA. 19th June, 1935. Messrs.Scintilla, Ltd., 14, Clerkenwell Close, London, E.C.1. For the attention of Mr.Berger. Dear Sir, Following your visit to our Works…

img003 Page two of a letter discussing performance issues and requirements for a dynamo voltage regulator.
View original record -2- In addition to the voltage characteristic being a rising one as indicated above it was also excessively irregular. This we think is a matter for better spring and magnetic circuit arrangement and…

img004 Letter to Messrs. Scintilla, Ltd. requesting an update on the progress of an experimental voltage regulator.
View original record 16092 Ha/Wst.6/MA. 6th September, 1935. Messrs. Scintilla, Ltd., 14, Clerkenwell Close, London, E.C.1. Dear Sirs, With further reference to our letter of the 19th of June reference Hs/Wst.2/MA. we…

img005 Letter from Scintilla Limited regarding the alteration and forwarding of a regulator.
View original record SCINTILLA LIMITED TELEPHONES: CLERKENWELL 8084-5-6. TELEGRAMS: "SCINTIMAG, SMITH, LONDON" NORTHERN BRANCH: 19/21, SOMERS STREET, LEEDS. PRODUCTS: MAGNETOS DYNAMOS - STARTERS SWITCHBOARDS - HEADLIGHTS…

img006 Attaching the specification for the inspection and testing of a new combined cut-out and regulator unit.
View original record Y6092. By. From Hs/Wst. c. to Sft/Mr.Brock. Hs/Wst.10/MA.17.9.35. We attach herewith specification of production inspection and test for the new combined cut-out and regulator unit. Hs/Wst.

img007 Specification for the production inspection, adjustment, and testing of a cutout and regulator unit.
View original record 17.9.35. SPECIFICATION OF PRODUCTION INSPECTION, ADJUSTMENT, AND TEST, OF CUTOUT AND REGULATOR UNIT. Type:- Spectre: Comprising R.R. cutout and C.A.V.-Bosch B2CJ1 regulator mounted on one base.…

img008 Test procedure for a dynamo cutout, detailing connections, operating conditions, and expected readings.
View original record -2- (3) The cutout shall then be connected up by low resistance cables to a large type dynamo, a 12 volt battery of suitable capacity, two ammeters A and B, and two voltmeters V and v, according to…

img009 Procedure for testing the dynamo and cutout system functionality.
View original record -3- (6) The dynamo speed shall be reduced until the ammeter A reading is zero, at which point, it is assumed, the battery is sufficiently charged to provide a P.D. of at least 12 volts across the…

img010 The specifications and mounting instructions for a regulator and its resistance unit.
View original record -4- REGULATOR. Resistance unit. This unit is composed of 26 S.W.G. Eureka wire wound non-inductively on a non-metallic tube. It should be ascertained that the wire is in sound condition throughout its…

img011 Instructions for the installation and testing of a regulator unit, including an open circuit volts test.
View original record -5- The location of the regulator on its base, and that of the base on the dashboard of the chassis, must be such that when in its final position, the regulator is not more than 15° from the…

img012 Test procedures for a dynamo and regulator with specified voltage and current outputs.
View original record -6- shall then be varied up to 5,000 R.P.M. At all speeds above the minimum required to operate the regulator the voltage should lie between 14.7 and 15.7. (2) Output at 13.0 volts. With the dynamo…

img013 Note on observing the standard chassis ammeter's needle swing.
View original record -7- NOTE. The standard chassis ammeter specified above, is for the purpose of measuring the effect of regulator operation, on the ammeter indications. The regulator causes the ammeter needle to…

img014 Electrical wiring diagram for a motor circuit with a control box.
View original record B, I, +, A, E, B, V, U, A, 15 . 7 . 35

img015 Letter to The Synthetic Carbon & Engineering Co. Ltd. acknowledging receipt of brushes for testing.
View original record 6093. Hs/Wst.10/MA. 18th September, 1935. The Synthetic Carbon & Engineering Co.Ltd., Colindale Avenue, London, N.W.9. Dear Sirs, We thank you for your letter of the 17th instant reference CHK/DF/UHL.…

img016 Letter to Joseph Lucas Ltd. complaining about the lack of development in voltage regulators.
View original record 16092. Hs/Wst.10/MA. 20th September, 1935. Messrs. Joseph Lucas, Ltd., Great King Street, BIRMINGHAM, 19. For the attention of Mr. W.E. Robinson. Dear Sir, We do not consider that we are being kept…

img017 Page from a letter discussing radio interference issues and improvements to the R.R. C.A.V. regulator.
View original record -2- (c) Freedom from interference with radio, i.e. made so that some suppression device can be used without destroying the regulator points. We should be glad to know what improvements are…

img018 Letter from Joseph Lucas Limited regarding the feasibility of applying a new regulator design to existing voltage control equipment.
View original record HEAD OFFICES & WORKS: GREAT KING ST., BIRMINGHAM. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O. AND LEADING RAILWAYS. TRADE MARK JOSEPH LUCAS LIMITED GREAT KING STREET…

img019 Letter from Joseph Lucas Ltd. regarding suppressing regulators fitted to Bentley cars.
View original record HEAD OFFICES & WORKS: GREAT KING ST., BIRMINGHAM. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O. AND LEADING RAILWAYS. JOSEPH LUCAS LIMITED GREAT KING STREET BIRMINGHAM…

img020 Modifications required for an electrical cutout for the Phantom III chassis, including a list of parts.
View original record R.H.C. c. Hs/Wst. WST 46092 BY/RD1/W.14.11.35. Cutout, Electrical. Sec.817C. R.R.Sch.845. With reference to the three sets of parts instructed in memo BY/RD3/W.15.4.35, one of these has been built up…

img021 Serious failure of a Dynamo Voltage Regulator on Sir Edmond Crane's car, GRF-9.
View original record BX. Hs. S. Wep. 86092. Hd/SB27/HR.14.11.35. Re DYNAMO VOLTAGE REGULATOR. --------------------- We have to report a rather serious occurrence on Sir Edmond Crane's car, GRF-9. This car came here for a…

img022 Recommendation to modify a resistance unit to prevent it from causing a fire and notes on a sealed regulator unit.
View original record - 2 - Hd/SB27/HR.14.11.35. Continued:- In view of the foregoing it would appear that the resistance unit should be modified so that the maximum current permitted by the field fuse before it blows can…

img023 Letter to C.A.V. Bosch Ltd. regarding performance issues with their regulators.
View original record Expl. Dept. 8609². Hs/Wst.6/MJ. 23rd. January, 1936. Messrs. C.A.V. Bosch Ltd., Acton, LONDON, W.3. Dear Sirs, We have been experiencing considerable trouble with C.A.V. regulators fitted to our cars…

img024 Letter to Scintilla Ltd. regarding modifications and testing of voltage regulators for dynamos.
View original record 86092 Expl. Dept. Hs/Wst.5/MJ. 23rd. January, 1936. Messrs. Scintilla Ltd., 14, Clerkenwell Close, LONDON. E.C.1. For the attention of Mr. Berger. Dear Sir, Some time ago considerable correspondence…

img025 Invoice from Scintilla Ltd. for a regulator type XM.240W.
View original record WST s/copy Hs/WST. G/Cam/CA.19/WP.26.2.36. We have an invoice from Scintilla Ltd., dated 20th inst on which we are charged £2. 18. Od nett for 1. Regulator type XM.240W, which they say has been sent…

img026 Request to place an order for a Scintilla Dynamo Regulator which was sent for testing.
View original record [Handwritten] 6092 To Roy. Hs/Wst.5/JH.27.2.36. Scintilla Dynamo Regulator. Will you please send an order to Messrs. Scintilla Ltd., for one regulator type XM.240W which has been sent to us for test…

img027 Letter to C.A.V.-Bosch, Ltd. requesting a representative visit the Works Laboratory to examine a faulty regulator.
View original record 86092 Hs/Wst.3/MA. 27th January, 1936. Messrs. C.A.V.-Bosch, Ltd., Acton, London, W.3. Dear Sirs, We thank you for your letter of the 24th instant, reference A/FC. and note your remarks therein. We…

img028 Letter from Scintilla Limited regarding voltage regulators and a potential visit from Mr. Berger.
View original record r6092. TELEPHONES: CLERKENWELL 8084-5-6. TELEGRAMS: "SCINTIMAG, SMITH, LONDON" NORTHERN BRANCH: 19/21, SOMERS STREET, LEEDS. SCINTILLA LIMITED MAGNETOS DYNAMOS - STARTERS SWITCHBOARDS - HEADLIGHTS…

img029 Letter from Scintilla Limited regarding the dispatch of a dynamo regulator for testing and a proposed visit.
View original record SCINTILLA LIMITED TELEPHONES: CLERKENWELL 8084-5-6. TELEGRAMS: "SCINTIMAG, SMITH, LONDON" NORTHERN BRANCH: 19/21, SOMERS STREET, LEEDS. DIRECTORS: A. HUGUENIN. (SWISS), F. BILLON. (SWISS), W.…

img030 Advice note from Scintilla Ltd. regarding the dispatch of a regulator.
View original record Dr. to SCINTILLA LTD. No. A 18404 THE SOCIETY OF MOTOR MANUFACTURERS & TRADERS LTD Telephone : CLERKENWELL 8084. 8085. 8086. Telegrams: SCINTIMAG, SMITH LONDON. Directors: A. Huguenin (Swiss) F.…

img031 Letter to J Lucas Ltd. requesting a diagram for a new American combined current and voltage regulator.
View original record √6092. Hs/Wst.19/JH. 3rd April, 1936. Messrs. J Lucas Ltd., Great King Street, Birmingham 19. For the attention of Mr. E.A. Watson. Dear Mr. Watson, Could you send me a diagram of the new American…

img032 Letter from Joseph Lucas Ltd. discussing a drawing of Delco Remy generator connections and voltage regulator arrangements.
View original record HEAD OFFICES & WORKS: GREAT KING ST., BIRMINGHAM. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O. AND LEADING RAILWAYS. [Handwritten]: /6092 "KING OF THE ROAD" LAMPS,…

img033 Confirming the dispatch of one Scintilla Voltage Regulator, complete with cut-out.
View original record 86092. Sr/Go2/FAW 22.4.36 To ROLLS-ROYCE Ltd Derby To Hs Copy to D/BP WST Further to our memo Go2/AD/16.4.36 , we are pleased to inform you that we are despatching to you to-day through the General…

img034 Acknowledging a request for parts, confirming communication with the Scintilla Company, and clarifying shipping and import duty options.
View original record r6092.WST GO2/AD/16.4.36. Rolls-Royce Ltd. Derby To Hs/Wst We acknowledge receipt of your memo Hs/Wst.I9/JH.8.4.36., and are communicating with the Scintilla Company concerning the items called for.…

img035 Extended bench test of a Scintilla voltage regulator.
View original record To E. From Hs/Wst. c. to BY. Y 6092 Hs/Wst.10/MJ.13.5.36. SCINTILLA REGULATOR. We have carried out on the bench an extended test of the latest Scintilla voltage regulator suitable for use with the…

img036 Recommendation for a redesigned regulator with larger proportions and adjustable contacts.
View original record -2- We consider that a regulator designed on the above principles and slightly larger proportions, to reduce heating, together with means of adjusting the contacts and the Spring pressures would be…

img037 Proceeding with the design of a Scintilla regulator and initiating a patent search.
View original record Hs/Wst. c. Ey. By./RD. WST 86092 E.1/HP.19.5.36. Scintilla Regulator. Your report reference Hs/Wst.10/MJ.13.5.36, confirms the favourable impression we have formed of the Scintilla scheme. I agree…

img038 List of parts and blueprint details for a Merlin 'E' Ignition Dynamo modified regulator.
View original record c. Hs/Wst. BY/RD. 5/B.19.6.36. Merlin "E" Ignition Dynamo. Modified Regulator. R.R. Sch.954. Herewith, blue prints of details made to the above scheme :- E.6434 - Rivet. 1 off. D.7366 - Frame. 1 off.…

img039 Instruction to fit a battery ignition regulator to Vulture and Exe dynamos.
View original record To RHC. 86092 HS/Wst.9/JH. 20.6.36. Battery Ignition Regulator R. R. Sch. 954. With reference to By/RD.5/B.19.6.36. as this regulator is also to be fitted to "Vulture" and "Exe" dynamos will you…

img040 List of new parts required for a multi-stage voltage regulator bench test for all chassis.
View original record PHC. c. Hs/Wst. V6092 BY/RD.2/B. 20.6.36. R.R. Sch. 942. Multi-Stage Voltage Regulator - All Chassis. We hand you herewith, blue prints of details made from the above scheme, to enable the regulator…

img041 Parts list with corresponding quantities and material specifications.
View original record -2- BY/RD. 2/B. 20.6.36. (Cont'd) D.75611 - Cable Eye-Res. Stud. C. 213B. 4 off. D.75612 - Connecting Link-Earth. " 1 off. D.75613 - Temporary Regulator Base. Bakelite Dilecto. 1 off. D.75614 -…

img042 Parts list for terminals, wood screws, and other required components for a bench test.
View original record -3- BY/RD.2/B. 20.6.36. (Cont'd) Terminals. Ross Courtney Terminal 5/32 Bolt Hole. .375 O/dia. 4 off. 1/8 " " Standard O/dia. 11 off. Wood Screws. No.5 x .625 Steel. 4 off. Further parts required,…

img043 Requesting an expedited report on modified Lucas Voltage Regulators to secure a cost saving.
View original record r6092. To Hs/Wst from ROY. ROY/MG6.7.36 Voltage Regulators Can you do anything, please, to expedite a report on the modified Regulators, i.e. Lucas modifications which will enable us to effect a…

img044 Letter to Joseph Lucas Ltd. confirming arrangements for the trial of regulators, horns, and other components.
View original record Voltage 6092. Regulators HS/Wst.2/JH. 22nd August, 1936. E. A. Watson Esq., Messrs. Joseph Lucas Ltd., Great King Street, Birmingham, 19. Dear Mr. Watson, Many thanks for the interesting time we spent…

img045 The supply and modification of voltage regulators.
View original record ✓6092 To Roy. Hs/Wst.7/JH. 8.7.36. Voltage Regulators. Replying to your ROY7/MG. 6.7.36., we have no intention at the moment, of modifying our standard voltage regulators, so we suggest that you order…

img046 Experiments on voltage regulators and ordering requirements for various chassis series.
View original record WST r6092. see me Hs. ROY/MB1/F.21.9.36. We understand experiments are being carried out with R.R. Type Voltage Regulator, and shall be pleased to hear what prospect there is of standardising same. At…

img047 The delayed standardization of the R.R. type regulator.
View original record To Roy/MS. 86092. Hs/Wst.6/JH.23:9:36: Replying to your Roy/MS.1/P.21.9.36, there will be no prospect of Standardising the R.R. type regulator for at least another year. Hs/Wst.

img048 And handwritten response concerning the potential standardization of new Lucas voltage regulators (DB.880).
View original record WST Please discuss x6092. To Hs/Wst from ROY. Rm/ROY/AIG/19.10.36 Lucas Voltage Regulators DB.880 we, You will recollect last July Messrs. Lucas stated they were reducing their production of the…

img049 Letter from Joseph Lucas Ltd detailing the dispatch and specifications of six type LR7 Voltage Regulator Units.
View original record JOSEPH LUCAS LIMITED GREAT KING STREET BIRMINGHAM 19 TELEPHONE : NORTHERN 5201 (12 LINES) TELEGRAMS & CABLES : "LUCAS, BIRMINGHAM." HEAD OFFICES & WORKS: GREAT KING ST., BIRMINGHAM. CONTRACTORS TO THE…

img050 Letter from Joseph Lucas Limited confirming the despatch of 'insensitive' and thermostatic control regulators for endurance testing.
View original record CONTINUATION Rolls-Royce. JOSEPH LUCAS LIMITED PAGE 2 DATE We would put on record that the three "insensitive" Regulators, which have been despatched are numbered:- LT0887. LT.0889. LT0888. and that…

img051 The specifications for LR7 regulators mounted on RF.50 control boxes.
View original record FOR MESSRS ROLLS ROYCE LTD. 3 - LR7 Regulators, LT.0887, LT.0888, LT.0889 mounted on RF.50 Control Boxes. These are insensitive regulators, i.e. by the choice of suitable spring and magnetic…

img052 Specifications and connection details for Thermostatic Regulators LT.0884, LT.0885, and LT.0886 mounted on RF.50 Control Boxes.
View original record FOR MESSRS. ROLLS ROYCE. 3 - Thermostatic Regulators LT.0884, LT.0885, LT.0886 mounted on RF.50 Control Boxes. These are regulators of the LR7 type, fitted with 38 ohm field parallel resistances and…

img053 The construction of a No.5 resistance element for a multi-stage regulator.
View original record 86092. To HPS. from Rm/Wst. Rm/Wst.24/AP.18.11.36. Resistance Element for Regulator. In connection with the experiments being carried out with a multi-stage regulator, will you please have one No.5.…

img054 In response to a query, stating no immediate alterations are planned for carbon brushes.
View original record rl6093. To Roy. from Rm/Wst. Rm/Wst.9/AP.1.12.36. CARBON BRUSHES Replying to your Roy/Ms.27/P.26.11.36., we are not contemplating any immediate or near future alteration in the carbon brushes referred…

img055 Requesting the replacement of a burnt-out regulator and its resistance unit on car 30-EX.
View original record 6092 To HPS. Rm/Wst.18/JH.2.12.36. Regulator on car 30-EX. The regulator and its resistance unit, on 30-EX, have been burnt out, as the result of a fault developing. Will you please instruct for these…

img056 Standardization timeline for a new Lucas voltage regulator and delays in ordering existing ones.
View original record To Roy. from Rm/Wst. c. to RHC. c. to Hs. c. to Sg. 6092 RE. VOLTAGE REGULATORS. RHC. has shewn me your note Roy.11/MG.30.11.36. I thought we hade made it quite clear to Mr.Mills that the new type…

img057 Intermittent fault with the regulator on car 36-EX, requesting its removal and replacement.
View original record 6092 To HPS. from Rm/Wst. Rm/Wst.9/AP.8.12.36. REGULATOR ON 36-EX. There appears to be an intermittent fault on the regulator of car 36-EX., which causes the armature fuse to "blow" Will you please…

img058 Covering note for a blueprint of modifications to a multi-stage voltage regulator for all chassis.
View original record c. Rm/Wst. 6092 BY/RD.2/B.8.1.37. MULTI STAGE VOLTAGE REGULATOR : ALL CHASSIS. We hand you herewith, blueprint of RR.Sch.1027, showing the various modifications proposed, based on the Experimental…

img059 Unsatisfactory testing of Lucas voltage regulators.
View original record To Roy. from Rm/Wst. 6092 Rm/Wst.1/AP.19.1.37. LUCAS VOLTAGE REGULATORS. Replying to your Roy/Ms.17/P.15.1.37., the lucas regulator we are testing out is not considered to be satisfactory for our…

img060 The fitting, testing, and ordering of Lucas Voltage Regulators.
View original record Rm. WST 6092 ROY/MS17/P.15.1.37. LUCAS VOLTAGE REGULATORS. As you are aware, we are at present fitting Regulators to our blueprint DB.880. & cheaper You are testing out a new type, and we shall be…

img061 Parts list for modifications to an experimental multi-stage regulator.
View original record 6092. c. Rm/Wst. BY/RD.6/B.15.2.37. ALL CHASSIS : MULTI STAGE REGULATOR : RR.Sch1027. Please put in hand, one set of the following parts, so that modifications can be made to the Experimental…

img062 List of parts and quantities required for a new coil assembly.
View original record -2- BY/RD.6/B.15.2.37. Cont'd. The Coil Assembly will also be new, and therefore the following parts will be required :- These Parts already issued :- D.75584. Core. 1 off. D.75588. Coil Washer. 3…

img063 Letter from Joseph Lucas Limited regarding a report on Plug Gaps.
View original record HEAD OFFICES & WORKS: GREAT KING ST., BIRMINGHAM. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O. AND LEADING RAILWAYS. JOSEPH LUCAS LIMITED GREAT KING STREET BIRMINGHAM…

img064 Letter to Joseph Lucas Ltd. enclosing a production specification for a C.A.V. Bosch Regulator, Type B2CJI.
View original record 6092 Rm/Wst7/M 23rd February, 1937. Messrs. Joseph Lucas Ltd., Great King Street, BIRMINGHAM. Dear Sirs, In accordance with the promise made to your Mr. C.E. Robinson of the Laboratory on the occasion…

img065 Requesting to try out a new Lucas combined regulator and cut-out unit on a Wraith chassis.
View original record SECRET. 6092 HPS from Rm/Wst. c to Rm/Gry. Rm/Wst4/M.25.2.37. We wish to try out, on the second Wraith Chassis, a new type of Lucas combined regulator and cut-out unit, Type LR7T. We have a suitable…

img066 Revised specification for production tests of a combined cut-out and regulator unit.
View original record By. from Rm/Wst. c. to RHC/EJB. 6092 Rm/Wst.9/AP.5.3.37 Specification of Production Tests for Combined Cut-out and Regulator Unit. We send you herewith revised specification for the above. It will be…

img067 Production inspection, adjustment, and test specification for the cutout and regulator unit on Phantom III and Bentley models.
View original record SPECIFICATION OF PRODUCTION INSPECTION, ADJUSTMENT, AND TEST OF CUTOUT AND REGULATOR UNIT. Type. Phantom III and Bentley. Comprising R.R. cutout and C.A.V. Bosch B.2.C.J.I. regulator mounted on one…

img068 Test procedures for a dynamo and cutout, specifying voltage, amperage, and resistance limits.
View original record 2. (3) The latter voltmeter having a loose lead suitable for touching on terminal B of the cutout when required. (4) The cutout being in a cold condition, and placed in a vertical position, as on the…

img069 Testing procedure for cutout contacts and specifications for a resistance unit and regulator.
View original record 3. after which the speed shall be gradually reduced still further until the cutout contacts fall apart. The instant of falling away will be shown by the drop to zero of the needle of the ammeter A.…

img070 Instructions for positioning and testing a regulator unit, including connection details for a test rig.
View original record -4. distortion of this part may upset the adjustment of the contacts, and consequently the operation of the regulator. The location of the regulator on its base, and that of the base on the dashboard…

img071 Testing procedure for a dynamo and voltage regulator, detailing outputs at different voltages and conditions.
View original record 5. (1) Output at 13.0 volts. With the dynamo delivering current to the battery, and the regulator cold, the dynamo shall be gradually speeded up, the voltage being maintained at 13.0 by adjustment of…

img072 Instructions regarding the acceptable swing of a needle at various speeds.
View original record 6. swing of the needle estimated, as far as possible, at the various speeds. The needle at no time should swing over more than two divisions. Wst.

img073 The return of three L.R.7 type regulators to Messrs Lucas for modification.
View original record 6092 To HPS/CEP. from Wst/RC. Wst/RC.22/AP.5.3.37. Will you please arrange for three L.R.7. type regulators to be returned to Messrs Lucas for modification to L.R.7.T. type. These should be marked for…

img074 Letter to Joseph Lucas & Co. Ltd. regarding a revised specification for the B.2/CJ.1. type regulator.
View original record 6092 Rm/Wst.8/AP. 5th March 1937. Messrs Joseph Lucas & Co.Ltd., Great King Street, BIRMINGHAM 19. For the attention of Mr.C.E.Robinson. Dear Sirs, We send you herewith a revised Specification of…

img075 The forwarding of three L.R.7 type Regulators to Messrs. Lucas for modification.
View original record To [redacted] from HPS/WSC. 6092 HPS/WSC.7/BA.6.3.37. Regulators. 22 We hand you herewith:- 3 - L.R.7 type Regulators. ✓ Will you please forward same to Messrs. Lucas for modification to L.R.7.T.…

img076 Urgent instruction memo to fit a Lucas LR7T voltage regulator to a car in the Repair Department.
View original record 6092 To HPS. c. to Wst/CAP. Rm/Wst.6/JH.15.3.37. URGENT. B-56-BN. Whilst this car is in the Repair Dept. will you please arrange to have fitted to the dash in place of the existing unit a Lucas LR7T…

img077 Letter to Lucas Ltd. concerning issues with a type LR.7.T. regulator.
View original record 6092 23rd March 1937 Rm/Wst.21/AP. Messrs Lucas Ltd., Great King Street, BIRMINGHAM. 19. For the attention of Mr.C.E.Robinson. Dear Sirs, Lucas LR.7.T. type Regulator No.LT.0884. As received, this…

img078 Letter from Joseph Lucas Limited discussing an LR7T Regulator's thermostatic compensation.
View original record HEAD OFFICES & WORKS: GREAT KING ST., BIRMINGHAM. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O. AND LEADING RAILWAYS. TRADE MARK 6092 "KING OF THE ROAD" LAMPS, HORNS.…

img079 Letter from Joseph Lucas Limited regarding the performance and modification of LR7T regulators.
View original record CONTINUATION JOSEPH LUCAS LIMITED PAGE 2 DATE 1st.April. thermostatically controlled regulator would give when hot. When, however, the reset regulator was allowed to warm up, naturally there was a…

img080 Technical memo on trialling the Lucas L.R.7.T. voltage regulator to replace the unreliable C.A.V. model.
View original record 6092. To E. from Rm/Wst. c. to By/RD. Rm/Wst.8/AP.5.4.37 LUCAS L.R.7.T. VOLTAGE REGULATOR. We are trying out these regulators, with a view to using them in place of the C.A.V. regulator which has…

img081 Letter to Joseph Lucas Ltd. detailing observations and requirements for Lucas Regulators type LR.7.T.
View original record 6092. 5th April 1937. Rm/Wst.1/AP. Messrs Joseph Lucas Ltd., Great King Street, BIRMINGHAM 19. For the attention of Mr.W.E.Robinson. Dear Sirs, Observations on Lucas Regulators type LR.7.T. In…

img082 Test results for output current and charging a fully-charged battery under various conditions.
View original record -2- Test 1. Output Current at 13 volts. Whole output taken through A.1. terminal. A variable resistance connected across a 12 volt battery to control volts. Volts measured at regulator terminals.…

img083 Technical note discussing the compromise between low and high currents in a divided series winding for a battery.
View original record -3- (3) It appears that with the divided series winding, we must compromise between a low total current through A.1 at 13 volts, and a high current through A. (passing into a fully-charged battery) at…

img084 Request for performance tests on Lucas regulators and further observation of a single wire petrol gauge.
View original record 6092 CAP. from Rm/Wst. Rm/Wst.6/AP.3.5.37 Will you please arrange at the earliest convenience to carry out performance tests hot and cold on the Lucas LR.7/T. regulators which are fitted to chassis…

img085 Requesting the issue of a scheme for a heat resisting field resistance due to regulator resistance burn outs.
View original record By/RD. 6092 Rm/Wst.16/JH.10.5.37. Regulator resistance burn outs. In view of Hd/SB.2/HR.10.5.30. we should be glad if you will issue to the Exptl. Dept. as soon as possible the scheme you made for a…

img086 Recurring burn-outs of regulator resistance units in four specific cars.
View original record RECEIVED MAY 10 1937 HS 6092 WST see me Hd/SB2/HR.10.5.37. re REGULATOR RESISTANCE UNIT BURN-OUTS. -------------------- You will remember that we drew your attention some eighteen months ago to a case…

img087 Responding to reports of regulator resistance burn outs, discussing investigation and proposing modifications.
View original record 6092. To Hd/SB. from Rm/Wst. c. By. c. Hs. c. E. 'RE: REGULATOR RESISTANCE BURN OUTS. Replying to your Hd/SB.2/HR.10.5.37 we have experienced only one other case of a regulator resistance burn out,…

img088 Investigation into recurring regulator resistance unit burn-outs.
View original record Rm/Wst. [illegible crossed-out text] 6092, Hd/SB2/HR.10.5.37. re REGULATOR RESISTANCE UNIT BURN-OUTS. You will remember that we drew your attention some eighteen months ago to a case of complete…

img089 Burnt-out regulator resistance from Mr. Player's car, chassis GLJ-58.
View original record Rm/Wst. 6092 Hd/SB12/HR.11.5.37. re REGULATOR RESISTANCE BURN-OUTS. ----------------- We note the contents of your Rm/Wst10/AP. 10.5.37., and we hand you herewith the regulator and the burnt-out…

img090 Request to arrange road tests for a new Lucas regulator on experimental Wraith and 33-EX cars.
View original record To Rm/FD. 6092 Rm/Wst.1/JH.25.5.37. We are very anxious to carry out tests with the new Lucas regulator fitted to one or two of our experimental cars. The cars we are anxious to try are the Wraith,…

img091 Requesting a change of voltage regulator on chassis 32-EX for a 10,000-mile test.
View original record To HPS. 6092 Rm/Wst.2/JH.5.6.37. Re Chassis 32-EX. The voltage regulator of this chassis has given trouble, and we wish this to be changed for the 10,000 miles test, for a new type Lucas LR/T. It is…

img092 Modification to prevent regulator resistance unit burn-outs on all chassis, including required parts lists.
View original record report issued .6092. To HPS c. Rm/Wst. BY/RD.6/B.10.6.37. REGULATOR RESISTANCE UNIT BURN-OUTS. All Chassis - RR.Sch.896. Please receive herewith details made from the above scheme which provides a…

img093 Anticipating delays in obtaining a porcelain bobbin and suggesting a synthetic substitute for testing.
View original record -2- BY/RD.6/B.10.6.37. We anticipate that there will be some difficulty and delay in obtaining D.76040 - Bobbin, in Buller's Heat Resisting Porcelain, and therefore, we think that a supply could be…

img094 Specification discrepancies with Messrs Lucas regarding C.A.V. regulators.
View original record To By/RD. from Rm/Wst. c. Roy. c. RHC/Smd. 6092 Rm/Wst.14/AP.23.6.37 RE. C.A.V. REGULATORS. Replying to your By/RD.2/B.22.6.37., we have discussed this matter recently with Messrs Lucas, pointing out…

img095 Rejection of C.A.V. Regulators, Type DB.880, due to specification conflicts.
View original record To Rm/Wst. c. RHC/Mr. Smedley c. ROY BY/RD.2/B.22.6.37. C.A.V. Regulators. Type DB.880. As you are aware, we are continually rejecting regulators because they fail to come within the low limit of the…

img096 Letter from Joseph Lucas Limited concerning cutout setting and regulator value issues.
View original record HEAD OFFICES & WORKS: GREAT KING ST., BIRMINGHAM. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O. AND LEADING RAILWAYS. JOSEPH LUCAS LIMITED GREAT KING STREET BIRMINGHAM…

img097 Letter from Joseph Lucas Limited regarding the performance and testing of an ignition coil and an LRT7 regulator.
View original record HEAD OFFICES & WORKS GREAT KING ST. BIRMINGHAM CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O AND LEADING RAILWAYS. 6092. JOSEPH LUCAS LIMITED GREAT KING STREET BIRMINGHAM…

img098 List of drawing numbers, models, and item names for ignition coil components.
View original record DRAWING NUMBER. MODEL. ITEM. ENM.587-31. Rolls-Royce Q.12. Coil Insulator. ENM.587-32. " " Sealing Screw. ENM.587-34. " " Gasket for Terminal Head. ENM.587-35. Rolls " Packing Washer. M.3311-1.…

img099 Instructing the return of a failed Lucas Regulator for examination and refitment to a Wraith Chassis.
View original record 6092, To D/BE. from HPS/WSC. Ex/Wst. HPS/WSC.9/BA.29.6.37. Chassis Regulators. We hand you herewith:- 1 Lucas Regulator which has failed after a short run. Will you please despatch same per passenger…

img100 Faulty Lucas regulator being returned for examination after failing a bench test.
View original record To HPS/CEP. c. to Wst/CAP. 6092 Wst/RC.3/JH.30.6.37. re Faulty Lucas Regulator. This regulator is a new one and on being tested on the bench failed to operate after a short run. Will you please return…

img101 Letter regarding a hand-made sample of a proposed Double Tier Voltage Regulator and Junction Box sent for testing.
View original record HEAD OFFICES & WORKS: GREAT KING ST, BIRMINGHAM CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O AND LEADING RAILWAYS. 6092 TRADE MARK 'KING OF THE ROAD' LAMPS, HORNS,…

img102 Letter to Joseph Lucas Ltd. acknowledging an experimental drawing for a voltage regulator and advising the sample has not yet been received.
View original record 6092. Rm/Wst.9/JH. 2nd. August, 1937. Your ref: X/LGT9 Messrs. Joseph Lucas Ltd., Great King Street, Birmingham. For the attention of Mr. Toulmin. Dear Sirs, We thank you for your letter of the 16th…

img103 Requesting a drawing for a steel spring hinge to be made based on a bimetal sample.
View original record 6092. To By/RD. Rm/RC.S/JH.11.8.37. re Lucas regulator Spring Hinge. Herewith one spring hinge made in bimetal. Will you please arrange for a drawing to be made showing same made in steel: the rating…

img104 Building the experimental Wraith III chassis with a C.A.V. regulator as the LR.7 regulator is not sufficiently developed.
View original record 6092 c. Rm/RC. BY/RD.2/B.13.8.37. WRAITH III. As the LR.7 Regulator is not sufficiently developed, we propose to build the experimental Wraith chassis with the present C.A.V. regulator. It will not…

img105 Request for two different Spring Hinge parts for experimental work on the Lucas LR.7 Regulator.
View original record 6092 c. Rm/RC. BY/RD.3/B.18.8.37. LUCAS LR.7 REGULATOR : ALL CHASSIS. In order that further experimental work may be carried out on the above unit, will you please put in hand the following parts :-…

img106 Letter to a supplier regarding an issue with uncovered Brightray wire shorting in a resistance unit.
View original record 6092? Rm/RC.6/JH. 26th August, 1937. Henry Wiggin & Co.Ltd., Wiggin Street, Birmingham. Dear Sirs, We recently obtained from your firm a quantity of 22 S.W.G. uncovered Brightray wire, and were under…

img107 Blueprint distribution note for a modification to the Wraith III Cutout and Regulator LOP.
View original record c. Rm/RC. cc Hs/CAN. 6092 BY/HK.2/B. 31.8.37. WRAITH III. Cutout & Regulator - Sec.8290. Please receive herewith blueprints of :- DW.392 - Cutout and Regulator LOP. This consists of a/modification to…

img108 Specification for the inspection, adjustment, and testing of a cutout and regulator.
View original record D.54562. Sht.2. SPECIFICATION OF PRODUCTION, INSPECTION, ADJUSTMENT AND TEST OF CUTOUT & REGULATOR. CHASSIS :- Phantom III. Bentley. TYPE :- R.R. Double Contact Cutout and C.A.V. Bosch B.Z.C.J.I.…

img109 Testing procedure for a regulator's resistance unit and electrical performance.
View original record REGULATOR. Resistance Unit. Check that the wire is in sound condition throughout its length, and that no break is likely to occur, particularly at the terminal screws. Any break or loose connection in…

img110 Letter from Joseph Lucas Ltd. regarding the supply and specification of LR7 and LRT7 regulators.
View original record HEAD OFFICES & WORKS GREAT KING ST. BIRMINGHAM CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O. AND LEADING RAILWAYS. "KING OF THE ROAD" LAMPS, HORNS. 'CYCLEALITIES'…

img111 Laboratory advice note detailing the settings for two LR7 Regulators.
View original record LABORATORY ADVICE NOTE. NO: 3342. Mr.W.E.Robinson (Tech.Sales) Mr.Toulmin. 17th.September,1937. DHW/CER/E. TO:- Technical Sales Dept. Please receive herewith, For Messrs.Rolls-Royce. 2- LR7 Regulators…

img112 The receipt and testing of two LR7 Regulators against the standard C.A.V. - Bosch B2.CJ-1 regulator.
View original record 6092. To Rm/RC. BY/RD.4/B.21.9.37. Regulators. Handed to you Please receive herewith, two LR7 Regulators specially made to meet the specification which we issued for our standard C.A.V. - Bosch…

img113 Specifications and settings for LR7 regulators mounted on RF50 boxes, referencing the B2CJ-1 regulator.
View original record COPY. For Messrs Rolls-Royce. 2 - LR7 Regulators mounted on RF50 Boxes, ENS 1202. These have been sent to fulfil the requirements of Messrs Rolls-Royce in their specification for the B2CJ-1 regulator,…

img114 Letter to Joseph Lucas Ltd. concerning the testing of horns and regulators.
View original record 6092 Rm/RC.11/MH. Messrs. Joseph Lucas Ltd., Great King St., Birmingham, 19. 23rd. September 1937. For the attention of Mr. Toulmin. Dear Sirs, We thank you for your two letters, received to-day,…

img115 Letter from Joseph Lucas Limited regarding the dispatch and technical specifications of a new LR7 Regulator.
View original record HEAD OFFICES & WORKS: GREAT KING ST., BIRMINGHAM CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O. AND LEADING RAILWAYS. 'KING OF THE ROAD' LAMPS, HORNS, 'CYCLEALITIES',…

img116 Letter from Joseph Lucas Limited regarding the supply of LRT7 Regulators for testing purposes.
View original record HEAD OFFICES & WORKS: GREAT KING ST., BIRMINGHAM. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O. AND LEADING RAILWAYS. 'KING OF THE ROAD' LAMPS, HORNS. 'CYCLEALITIES'…

img117 Laboratory advice note detailing the output figures for LRT7 Regulators under various conditions.
View original record RR LABORATORY ADVICE NOTE. No. 3355. Mr.Toulmin. To:- Technical Sales Dept. Date:- 30th September,1937. EL/CER/S. Please receive, herewith For Rolls Royce. 2 - LRT7 Regulators for Messrs.Rolls-Royce…

img118 Request to order and test 'Glowray' resistance wire for a regulator unit, as the oxidised wire proved unsatisfactory.
View original record 6092, To HPS. c. Rm/RC. BY/RD.6/B.8.10.37. Regulator Unit - RR.Sch.896. Will you please order a bobbin of :- 23 SWG. Wiggins' "Glowray" Resistance Wire, D.C.C. Quantity required - not less than 50 Ft.…

img119 Recommendation on the winding method for a C.A.V. Bosch Regulator Resistance Unit, concluding that it should be wound inductively to avoid extra cost.
View original record To By. c. to By/RD. 6092 Rm/RC.4/JH.23.10.37. re C.A.V. Bosch Regulator Resistance Unit. In connection with the point raised as to whether the unit should be wound inductively or not, we understand…

img120 Blueprints and required parts for the Wraith Cutout and Regulator Unit.
View original record To HPS. c. BY. c. Rm/RC. c. RHC/GAN. 6092 BY/RD.1/B.26.10.37 WRAITH. Cutout and Regulator Unit : D.CD.71 : Sec.8290. Please receive herewith blueprints of parts detailed from the above scheme :-…

img121 Alteration to the Wraith III Regulator & Resistance Unit.
View original record To: HFG. c.c. BY c.c. Em/RC. c.c. RHC/CAN. 6092. BY/RD.2/B.28.10.37. WRAITH III. Regulator & Resistance Unit : Sec.8290. Please receive herewith our alteration 1554/Dss., adding to LOP. DW.392 the…

img122 Letter to Joseph Lucas Ltd. detailing the results of bench tests on LR.7 and LRT.7 type regulators.
View original record 6092 Rm/RC.9/MH. Messrs. Joseph Lucas Ltd., Great King Street, Birmingham. 27th. October 1937. For the attention of Mr. Toulmin. Dear Sirs, We have now completed bench tests on the three LR.7 type,…

img123 Electrical current tests under hot conditions for various units and regulators.
View original record -2- Rm/RC.9/MH. HOT condition. Unit. Amperes. Without ( ENS 1202 - 1 17.4 to 16.0 At all speeds up to 6000 R.P.M Compens- ( ENS 1202 - 2 18.2 to 14.0 " " " " " " " ation. LT 1325 19.4 to 16.4 " " " "…

img124 The performance of regulators and cutouts, detailing test results and proposed modifications.
View original record -3- 15 volts, the load taken through A1 is very small (about 1.5 amperes) we must consider what load is being taken through terminal A. More so, as we assume this constitutes the current that is going…

img125 Suggestions for adjusting a regulator's winding turns and output amperage.
View original record -4- RM/RC.9/MH. winding, so that instead of having 3 turns in the first portion leading to "A" terminal, and 3 turns in the second portion leading to "A"1, we have 4 turns in the first portion and 2…

img126 Experimental department report on Lucas Regulator & Cutout Units, concluding they are unsuitable for standardisation.
View original record EXPERIMENTAL DEPARTMENT REPORT. 6092. REFERENCE:- Rm/CAP.11/MH.28.10.37. Subject of Report:- Lucas Regulator & Cutout Units. General Conclusion:- Not suitable in their present condition for…

img127 The investigation and testing of a Lucas Dynamo Regulator and Cutout unit.
View original record File To By. from Rm/CAP. c. Rm. c. By/RD. Rm/CAP.11/WH.28.10.37. LUCAS DYNAMO REGULATOR AND CUTOUT. The Lucas regulator and cutout, are mounted on one base, together with the necessary terminals, thus…

img128 Single-stage voltage regulator, discussing its design, fuse issues, and temperature characteristics.
View original record -2- (a) This regulator is of the single-stage type, wherein a resistance is intermittently inserted in the field circuit of the dynamo; thus limiting the dynamo voltage with rise in engine speed. From…

img129 Output current measurements at 13.0 Volts, comparing performance with and without a temperature compensating device under cold and hot conditions.
View original record -3- Output Current at 13.0 Volts. Cold. Specified. 14.0 to 16.5 amperes. Lucas unit without compensation. 10.8 " (Average for whole range of speed) Unit with compensation. 16.0 " " " " Output Current…

img130 Performance, reliability, and lifespan of regulators, including output current measurements under cold and hot conditions.
View original record -4- Rm/CAP.11/MH.28.10.37. (c) continued. Output Current at 15.0 Volts, Cold. Specified. 1.0 to 5.4 amperes. Unit without compensation 5.4 " (average) Unit with compensation 8.5 " " Output Current at…

img131 The performance issues of a voltage cutout and regulator, with a summary and recommendations.
View original record -5- Cutout. This, like the regulator, suffers from a large rise in operating voltage with temperature. The operating voltage in the cold condition is specified to lie between 12.2 and 12.8 volts. With…

img132 Action plans for the development of regulators and cutouts.
View original record -6- Rm/SSP11/MH.28.10.37. At the same time, we shall ask for one of the units to be arranged with a modified proportioning of the series turns, which should bring the day-running battery charge,…

img133 Test report on the fuse in the resistance unit circuit of a C.A.V. regulator, detailing failure modes and proposed improvements.
View original record 6092. To By, from Rm/RC. c. By/RD. Rm/RC.7/MH.18.11.37. FUSE IN RESISTANCE UNIT CIRCUIT OF C.A.V. REGULATOR. In testing this unit, it was assumed that the regulator had already failed to operate on…

img134 Letter to Joseph Lucas Ltd. detailing investigations into regulator and dynamo performance.
View original record 6092. Rm/RC.5/MH. 26th. November 1937. Messrs. Joseph Lucas Ltd., Great King Street, Birmingham. For the attention of Mr. Toulmin. Dear Sirs, During the recent visit of your Mr.C.E.Robinson it was…

img135 Test results for a regulator, detailing resistance values and output currents under various conditions.
View original record -2- 26th. November 1937. (yoke temperature 70°C) condition. This was found to be:- Cold - 105.4 w. Hot - 117 w. (b) What value of resistance was necessary to limit the output of the machine when on…

img136 Test report on output current measurements under various conditions, including cold, hot, and battery load scenarios.
View original record -3- 26th. November 1937. Output.Current at 15 volts, taken from terminal A with constant resistance load of 1.5 amperes taken from A1. Cold. First test - 5.4 amperes. Re-test - 4.5 " Hot. First test -…

img137 Letter regarding the return of regulators and plans for further experiments on a compensated unit.
View original record -4- 26th. November 1937. We may be under a misapprehension, but these results are about what we would expect. As suggested at the time, we are now returning, under separate cover, four of the five…

img138 Request to arrange the return of several Lucas regulators to their makers after testing.
View original record HPS/CEP. 6092 Rm/RC.6/JH.29.11.37. LUCAS REGULATORS. Will you please arrange for the return to the makers of the following regulators. 1 LR7 ENS.1202 - 1 1 LR7 ENS.1202 - 2 1 LR7 LT. 1325. 1 LRT7 LT.…

img139 Requesting the forwarding of several Lucas Regulators to Messrs Lucas after completion of tests.
View original record Rm/RC 6092 To D/BB. from HPS/WSC. [strikethrough]Hs/BS[/strikethrough] [strikethrough]c/rs.[/strikethrough] [strikethrough]Esx.[/strikethrough] HPS/WSC.2/BA.1.12.37. Lucas Regulators. Will you please…

img140 Request for instructions to fit a steel spring onto a Lucas regulator armature, replacing the existing bi-metal spring.
View original record HPS. c. Ro/CAP. 6092 Rm/RC.1/JH.7.12.37. Lucas Regulator Spring. We have a Lucas regulator armature on which we would like a steel spring fitted, in place of the bi-metal spring at present thereon.…

img141 Letter to Lucas Ltd. concerning the specifications and supply of special electrical regulators.
View original record 6092. Rm/RC.19/JH. 16th December, 1937. Messrs. Lucas Ltd., Great King Street, BIRMINGHAM. 19. For the attention of Mr. Toulmin. Dear Sirs, With reference to our conversation over the 'phone with Mr.…

img142 Letter from Joseph Lucas Limited detailing the specifications of three voltage regulators sent for testing.
View original record JOSEPH LUCAS LIMITED GREAT KING STREET BIRMINGHAM 19 HEAD OFFICES & WORKS: GREAT KING ST., BIRMINGHAM. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O. AND LEADING…

img143 Visit to the offices and laboratory of Messrs. Lucas to discuss regulators and ammeters.
View original record To By. c. to By/RD. 6092. Rm/RC.3/JH.4.1.38. Visit to the Offices and Laboratory of Messrs. Lucas. The main object of the visit was to discuss points arising from our request for a regulator having a…

img144 Confirming the receipt of three specially adjusted Lucas dynamo voltage regulators to address battery under-charging.
View original record To Roy/MS. c. to RC/CAP. 6092 Rm/RC.1/JH.4.1. 9/5/40 LUCAS REGULATORS. Will you please note that we have today received from Messrs. J. Lucas Ltd. :- 3 Dynamo voltage regulators type B.2.C.J.1.A. Nos.…

img145 Testing a modified Lucas LR.7 type regulator to reduce the effect of temperature on its output characteristic.
View original record 6142 To By. from Rm/RC. c. By/RD. Rm/RC.1/MH.10.1.38. LUCAS REGULATOR. We have received from the makers, and tested one LR.7 type regulator, which has been modified for the purpose of reducing the…

img146 Next steps for road testing regulators, specifically the placement of resistance units considering heat production.
View original record -2- Rm/RC.1/MH.7.1.38. bench performance, and we now feel that we can move forward. The next step should be, we think, to have a number of regulators of this type, made up in the final form mounted…

img147 Correct fusing value for a regulator resistance unit.
View original record 6092 To By, from Rm/RC, c. By/RD. Rm/RC.7/MH.14.1.38. FUSE FOR REGULATOR RESISTANCE UNIT. As reported in our memo Rm/RC.7/MH.18.11.37 the fuses supplied by the makers, to DW.448, with a nominal value…

img148 Instruction to test a Lucas LR.7 Regulator & Cutout Unit and modify the cover with ventilating holes for the Bentley III.
View original record RC 6092. cc. Rm/RC. BY/RD.6/B.14.1.38. BENTLEY III. Regulator & Cutout Unit - Sec.8290. In order to test the Lucas LR.7 Regulator on the first two cars, we have had two units built up on our standard…

img149 Letter to Joseph Lucas Ltd. regarding the testing and specifications of an LR7 regulator, model LT.1427.
View original record Rm/RO.8/JH. 18th January, 1938. Messrs. Joseph Lucas Ltd., Great King Street, BIRMINGHAM. For the attention of Mr. Toulmin. Dear Sirs, With reference to the LR7 regulator No.LT.1427 which you recently…

img150 Letter to J. Lucas Co. Ltd. regarding the standardisation of regulator units for testing.
View original record J. Lucas Co.Ltd., -2- Rm/RC.8/JH.18.1.38. We are now ready to move forward to the standardisation of this type of regulator but in order to do so we must have a number - say six - of the latest type…

img151 Request for a modification to a base plate to mount a Lucas regulator on a Bentley III.
View original record 6092, To HPS. c. to RC/CAP. Rm/RC.4/JH.19.1.38. LUCAS REGULATOR ON R.R. BASE - BENTLEY III. For the purpose of mounting the Lucas regulator on the present R.R. regulator-cutout unit base, we require…

img152 Letter from Joseph Lucas Limited regarding the production of LR.7 Voltage Regulators and control boxes.
View original record HEAD OFFICES & WORKS GREAT KING ST., BIRMINGHAM CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O. AND LEADING RAILWAYS CHILDS (handwritten) 60981 (handwritten) regulator…

img153 Requesting the dispatch of a Bentley Ill Regulator Unit to Messrs. Lucas for modification.
View original record To HPS. c. to RC/CAP. 6092 regulator Rm/RC.9/JH.25.1.38. re Bentley Ill Regulator Unit. Will you please despatch to Messrs. Lucas as soon as possible one regulator unit for modification. To be marked…

img154 Letter to Joseph Lucas Ltd. regarding the supply and specific wiring of an LR7 regulator.
View original record 6092 regulator Rm/RC.6/JH. 26th January, 1938. Messrs. Joseph Lucas Ltd., Great King Street, BIRMINGHAM. For the attention of Mr. Toulmin. Dear Sirs, With reference to your letter ref. X/LGT/9. of the…

img155 Inquiry to J. Stone & Co. Ltd. regarding the availability and price of dynamo voltage regulators for cars.
View original record 6092 Rm/RC.12/JH. 27th January, 1938. Messrs. J. Stone & Co.,Ltd., Deptford, LONDON.S.E.14. Dear Sirs, We are informed by our colleagues in the aero section, that you are manufacturers of dynamo…

img156 Letter to Joseph Lucas Ltd. detailing disappointing bench test results for three C.A.V. regulators.
View original record Rm/RC.9/JH. 27th January, 1938. Messrs. Joseph Lucas Ltd., Great King Street, BIRMINGHAM. For the attention of Mr. Toulmin. Dear Sirs, We have now completed our bench tests on the three specially…

img157 Proposal to alter test specifications for higher output, comparing current and suggested amperage ranges at set voltages.
View original record -2- Rm/RC.9/JH.27.1.38. obtaining a higher output at 13.volts being to alter the adjustment of the existing standard unit. If this is correct, and it is decided to take advantage of the special…

img158 Letter concerning the Control Box unit for three experimental Bentley models, discussing regulators, resistance placement, and wiring.
View original record HEAD OFFICES & WORKS: GREAT KING ST., BIRMINGHAM. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O. AND LEADING RAILWAYS. KING OF THE ROAD' LAMPS, HORNS, 'CYCLEALITIES'…

img159 Letter from Joseph Lucas Limited regarding the necessity and placement of a dynamo field fuse.
View original record CONTINUATION JOSEPH LUCAS LIMITED PAGE 2 DATE 28/1/38. out at A1 and not A. would be corrected automatically. Further to your remark about the Dynamo Field Fuse to carry the Regulator Shunt Winding…

img160 The bench testing and modification of a regulator-cutout unit for scheme DCD.71.
View original record 6092. To By. from Rm/RC. c. to By/RD. Rm/RC.11/JH.1.2.38. Regulator - Cutout Unit to Scheme DCD.71. The model regulator-cutout unit made to the above scheme has now been tested on the bench. In this…

img161 Note suggesting a regulator was wrongly blamed for an issue caused by blowing dynamo fuses.
View original record RC. 6092 By. from Rm. c. Mx. Rm6/R.3.2.38. This was probably a case where the regulator was blamed due to dynamo fuses blowing. Rm.

img162 Examination and test report on a faulty C.A.V. regulator from chassis 3.BU.138.
View original record 3.2.38. FAULTY REGULATOR REMOVED FROM CHASSIS 3.BU.138. C.A.V. regulator No.B.2.C.J.1. 45105, which was said to have failed on the above car, was handed to us for examination and test. No details of…

img163 Continuation page of a document discussing supplied armature fuses.
View original record -2- The fuses mentioned above as being supplied were probably armature fuses that had been blown. RM/RC.

img164 Customer complaint about a flat battery and non-charging dynamo, traced to the voltage regulator on a Phantom III.
View original record 6092. S/W....He (crossed out) c. to EY. (crossed out) c. to Rm. C2/C3.2.38 Re 3-BT-159....H.Lebus. ------- You will be receiving a Customer's Complaint Form from 'N' in respect of 3-BT-159. They have…

img165 Requesting the removal of a regulator from car 35.EX for testing and replacement.
View original record 6092. To HPS. c. to RC/CAP. Rm/RC.12/JH.4.2.38. REGULATOR ON CAR 35.EX. The regulator on car 35.EX. is urgently required for examination and test. Will you therefore please arrange to have this unit…

img166 Two outstanding invoices from Joseph Lucas Ltd. for five voltage regulators.
View original record RM/RC. 6092. G/WFH/CA.16/MV.4.2.38. We have 2 invoices from Joseph Lucas Ltd. dated 18th ulto, details of which are shown below. They say these 5 Regulators were sent for the attention of Mr.Pignatt.…

img167 New specification, supply issues, and fitting recommendations for a high output regulator.
View original record 6092. To By. c. to Mx. Rm/RC.5/JH.5.2.38. HIGH OUTPUT REGULATOR. Further to our report ref. Rm/RC.10/JH.7.1.38. in which we stated that a higher output regulator was necessary, steps were taken to…

img168 Request for the production of three modified sub-bases for mounting Lucas regulators on Bentley III cars.
View original record To HPS. c. to RC/CAP. 6092 Rm/RC.2/JH.9.2.38. BENTLEY III. Lucas Regulator on R.R. Base. In connection with the mounting of Lucas regulators on R.R. bases for Bentley III cars, we now require three…

img169 Summary of a visit to Messrs Lucas to investigate and discuss dynamo regulator troubles and specifications.
View original record By. from Rm/RC. c. By/RD. 6092. Rm/RC.1/AP.11.2.38 Re. Visit to Messrs Lucas (7.2.38) In order to investigate regulator troubles Rm/CAP. and myself visited the works of Messrs Lucas and discussed the…

img170 Modifications and specifications for Lucas regulators and control units.
View original record -2- tools. Mr. Toulmin of Lucas is looking into this question, and will let us know to what extent this will be, as soon as possible. If it were decided to completely change over to this type of…

img171 Two C.A.V. type regulators with higher output characteristics received from Messrs. Lucas.
View original record To Roy/Mr.Mills. from Rm/RC. 6092, Rm/RC.6/MH.14.2.38. C.A.V. REGULATORS WITH HIGHER OUTPUT CHARACTERISTICS. Will you please note that we made a request to Messrs.Lucas for, and have now been supplied…

img172 Requesting the replacement of a Lucas regulator unit with a standard R.R. unit, noting it will require slight alterations.
View original record 6092 To HPS. c. to RC/CAP. Rm/RC.9/JH.14.2.38. re 27.G.VI. Will you please replace the Lucas regulator unit on the above car with a standard R.R. unit to LOP.DW.392. This will incur slight alterations…

img173 Requesting the fitting of two experimental higher output C.A.V. regulators onto test cars.
View original record To HPS. from Rm/RC. c. RC/CAP. 6092 Rm/RC.3/MH.15.2.38. EXPERIMENTAL HIGHER OUTPUT REGULATORS. (TYPE B.2. R.343). We have received for test two C.A.V. regulators, fitted with 2 1/2 turn series…

img174 Comparing the characteristics of two C.A.V. regulators, a standard unit and a new higher output model.
View original record 6092. To By. c. to By/RD. Rm/RC.6/JH.16.2.38. C.A.V. REGULATORS WITH HIGHER OUTPUT CHARACTERISTIC. We have received from the Makers, and bench tested, two regulators of the B.2.R.343 type. These have…

img175 Fitting of experimental C.A.V. regulators with a higher setting to two cars.
View original record 8092 To HPS. c. to RC/WAP. Rm/RC.12/JH.17.2.38. C.A.V. REGULATORS WITH HIGHER SETTING. We have two experimental regulators of the standard type B.2.C.J.1.a. but with a specially high setting. Will you…

img176 Parts request for a Bentley III Regulator and Cutout Unit to be sent to Messrs. Lucas.
View original record 6092 To HPS (crossed out) c. Rm/RC. RC BY/RD.3/B.17.2.38 BENTLEY III. Sec.8290 - Regulator and Cutout Unit. 'Will you please send to Messrs. Lucas 3 sets of parts to D.54562 LOP. Sheets 1 and 2,…

img177 C.A.V. regulators and the problem of battery sulphating.
View original record Rm. Rm/RO. RY/ED. ---------- R C, BY.13/G.22.2.38. 6092. C.A.V. REGULATORS. With reference to Rm/RC./JH.16.2.38. the regulator under heading (2) is the desirable type, if this is similar to our…

img178 C.A.V. regulators and complaints of battery sulphating.
View original record 6092. Rm/RC. RY/WD BY.13/G.22.2.38. Please arrange Rm C.A.V. REGULATORS. With reference to Rm/RC./JH.16.2.38. the regulator under heading (2) is the desirable type, if this is similar to our present,…

img179 List of parts for Bentley III Regulators and Cut-Outs to be sent to Messrs Lucas.
View original record To D [REDACTED] from HPS/WSC 6092. Rm/RC. HPS/WSC.25/BA.24.2.38 We hand you herewith the undermentioned details in connection with Bentley III Regulators and Cut-Outs. Will you please arrange to…

img180 Invoices from Messrs. Joseph Lucas Limited for 5 Regulators, requesting payment clearance.
View original record Details given to C.A. 4/1/38. verified by C.A.P. 25/2/38 Mistakes on CA's part Rm/RC. 6092. G/WFH/CA.20/MG.24.2.38. Further to our memo of the 4th inst. reference G/WFH/CA.16/MV. giving you details of…

img181 Order for B.2.CJ1A Voltage Regulators set to a specific high voltage.
View original record 6092. To Roy/Ms. Rm/RC.2/JH.24.2.38. re B.2.CJ1A Voltage Regulators (High Setting) We have ordered by 'phone 24 B.2.CJ.1.A. voltage regulators, especially set at our request to 15.8 -16.4 volts. We…

img182 The parts list for Bentley III Regulators & Cut-out to be ordered from Messrs Lucas.
View original record To D/Exp. from HPS/WSC. HA/PC. Roy Sec. Rm/RC. 6042. HPS/WSC.1/BA.2.3.38. O/52440. Bentley III Regulators & Cut-out. In connection with the above will you please despatch to Messrs Lucas the…

img183 Improvements to dynamo output regulators and a switch from 60 to 48 watt bulbs.
View original record 6092 c. Rm/RC. BY.4/G.3.3.38. DYNAMO OUTPUT REGULATORS. I wish to confirm the information I conveyed to Sg. at the Conference on Tuesday to the effect that we have been pressing the C.A.V. people for…

img184 Returning 60 Watt bulbs for replacement in relation to dynamo output regulators.
View original record 6092 N/W. By. c Rm/RC. c D/BP. Br/G18/M. 4.3.38. re, Technical - Electrical. Dynamo Output Regulators. We have noted the contents of BY.4/G.3.3.38., and in regard to the concluding portion, we are…

img185 Internal request to order 12 Voltage Regulators from Messrs. Joseph Lucas Ltd. for testing purposes.
View original record MS 776289 6092 To HPG c. Rm/RC. BY/RD.1/B.5.3.38. REGULATORS : SEC.8290 : ALL CHASSIS. 2 1/2 turns Will you please order from Messrs. Joseph Lucas Ltd., 12 Voltage Regulators in accordance with…

img187 Letter from J. Stone & Company to discuss the suitability of an H. type regulator and arrange a meeting.
View original record 6092 DATES NAMED FOR DELIVERY ARE SUBJECT TO STRIKES, ACCIDENTS & OTHER UNFORESEEN CIRCUMSTANCES. [STAMP: NATIONAL SCHEME FOR DISABLED MEN] BRANCHES & AGENCIES AT GLASGOW, CALCUTTA, MARSEILLES, CAPE…

img188 Letter to J. Stone & Co. Ltd. discussing the feasibility and cost of fitting their type H regulator to company cars.
View original record 6042. Rm/RC.7/JH. 7th March, 1938. J. Stone & Company Ltd., Deptford, LONDON.S.E.14. Dear Sirs, With reference to the visit here, on February 10th, of your representative, in connection with the…

img189 Letter from J. Stone & Company regarding the decision not to use their Carbon Pile Regulators.
View original record 413 6092 DATES NAMED FOR DELIVERY ARE SUBJECT TO STRIKES, ACCIDENTS & OTHER UNFORESEEN CIRCUMSTANCES. BRANCHES & AGENCIES AT GLASGOW. CALCUTTA. MARSEILLES. CAPE TOWN. STOCKHOLM. ATHENS. BELGRADE.…

img190 Advice note from Joseph Lucas Limited for an experimental LR7 regulator on a Rolls Royce base.
View original record K.2 DESPATCH Please receive from ADVICE NOTE 6092 SLC 4623 JOSEPH LUCAS LIMITED BIRMINGHAM 19. The undermentioned Goods per Our m/brons Messrs. Rolls Royce Ltd Derby Date: 11.3.1938 Telegrams: "LUCAS,…

img191 Advice note from Joseph Lucas Limited regarding the dispatch of an L.R.7 Regulator.
View original record K.2 DESPATCH ADVICE NOTE 6092 SLC 4623 Please receive from JOSEPH LUCAS LIMITED BIRMINGHAM 19. The undermentioned Goods per Our m/c vans Messrs Rolls Royce Ltd Derby 11. 3. 1938 Telegrams: "LUCAS,…

img192 The supply of special regulators for the Phantom III to fix battery charging issues.
View original record 6092 W/N (Br) c. Rm/RC. c. BY/RD. BY.14/N.18.3.38. Re: Ph.III - Regulators D.76239. We are sending you under separate cover six CAV. type B.2. C.J.l.A. regulators, as referred to in my earlier memo.…

img193 The fitting of a new R.R. type Lucas regulator for a Bentley III chassis.
View original record To HPS. from Rm/RC. c. RC/CAP. c. Rm/FD. Rm/RC.11/MH.18.3.38. 6092. R.R. TYPE LUCAS REGULATOR FOR BENTLEY III. We have now available the first of the correct type of regulator unit, No.R.R.I., for…

img194 Letter to Messrs. Lucas Ltd. regarding the fitting and return of an LR.7 regulator.
View original record 6092. RM/RC.16/JH. 22nd. March, 1928. Messrs. Lucas Ltd., Great King Street, BIRMINGHAM. For the attention of Mr. Toulmin. Dear Sirs, We thank you for the LR.7 regulator No.LT.1484 with larger…

img195 Instructions for modifying a Lucas LR.7 type regulator, involving replacing an obsolete unit.
View original record HPS/WSC: o. RC/CAP. 6092. Rm/RC.3/JH.23.3.38. Lucas LR.7 type regulator to be modified. We have now received from the makers and had fitted on 7.B.V. an up-to-date LR.7 regulator unit. The unit…

img196 Obsolete Bentley III Lucas L.R.7 Regulator Unit.
View original record To [REDACTED], from HPS/WSC. Rm/RC. 6092. HPS/WSC.1/BA.24.3.38. 0/52440. Bentley III Regulators. We hand you herewith:- 1 Lucas L.R.7 Regulator Unit. This Unit has been removed from 7-B-V, is of an…

img197 Fitting of a new Lucas LR.7 regulator to Bentley car B.56.BN.
View original record 6092. To HPS. c. to RC/CAP. Rm/RC.11/JH.8.4.38. LUCAS REGULATOR ON CAR B.56.BN. We have now received from the makers a second LR.7 regulator of the R.R. type with the sub-base. Will you please arrange…

img198 Letter to Messrs. Joseph Lucas Ltd. reporting a failure of an LR.7 regulator unit during testing.
View original record 6092 - Rm/RC.10/JH. 14th April. 1938. Messrs. Joseph Lucas Ltd., Great King Street, Birmingham. For the attention of Mr. Toulmin. Dear Sirs, We regret to report a failure of one of the two LR.7…

img199 Failure of an experimental Lucas R.R. Type Regulator during bench tests.
View original record 6092- HPS/WSC : c. to RC/CAP. Rm/RC.14/JH.14.4.38. LUCAS R.R. TYPE REGULATOR. One of the three experimental regulators of the above type No.RR.III has failed during bench tests. Will you please make…

img200 Requesting a faulty Lucas R.R. type Regulator be forwarded for repair.
View original record To Messrs. from HPS/WSC. Haywards. (struck through) Derby. (struck through) Rm/RC. 6392- HPS/WSC.2/BA.20.4.38. Lucas R.R. type Regulator. We hand you herewith:- 1 Lucas R.R. type Regulator No.R.R 111.…

img201 Letter from Joseph Lucas Ltd. to Rolls-Royce concerning a report of a faulty LR.7 Regulator unit and confirming its non-receipt.
View original record HEAD OFFICES & WORKS GREAT KING ST. BIRMINGHAM CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G P O AND LEADING RAILWAYS SERVICE DEPÔTS BELFAST: 51/55, UPPER LIBRARY ST…

img202 Letter to Messrs. Lucas Ltd. regarding a regulator that was despatched without being addressed to the correct person.
View original record 6092. Rm/RC.15/JH. 26th April, 1938. Messrs. Lucas Ltd., Great King Street, BIRMINGHAM. For the attention of Mr. Toulmin. Dear Sirs, In reply to your letter of 22nd. April, ref. X/LGT/9. Lucas R.R.…

img203 The return of a Lucas regulator for B.50 to the makers for examination.
View original record 6092 To HPS/WSC. Rm/RC.3/JH.2.5.38. re Regulator for B.50. Will you please arrange for 1 Lucas regulator, marked 'R.III' to be returned to the makers for their examination. TO BE MARKED FOR THE…

img204 Letter to Messrs. Lucas Ltd. regarding the return of a special regulator unit following a phone conversation.
View original record 6092 Rm/RC.4/JH. 2nd. May, 1938. Messrs. Lucas Ltd., Great King Street, BIRMINGHAM. For the attention of Mr. Toulmin. Dear Sirs, Further to our 'phone conversation this morning concerning the third of…

img205 Letter from Joseph Lucas Ltd regarding the misdirection and subsequent investigation of a returned Regulator and Cutout unit.
View original record 6092 HEAD OFFICES & WORKS: GREAT KING ST., BIRMINGHAM CONTRACTORS TO THE ADMIRALTY WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O AND LEADING RAILWAYS JOSEPH LUCAS LIMITED GREAT KING STREET BIRMINGHAM…

img206 Parts list for Bentley III Regulators to be ordered from Messrs Lucas.
View original record To D/BP. from HPS/WSC. HG/FC. [stamped and crossed out] Roy. [stamped and crossed out] G/RD. [stamped and crossed out] RM/RC. [stamped and crossed out] 6042 HPS/WSC.4/BA.6.7.38. 0/52440. Bentley III…

img207 Test report on a dynamo and regulator for car 35.EX.
View original record To By. c. to By/RD. 6092 DYNAMO & REGULATOR TEST ON 35.EX. A test has been carried out on the 72 segment armature dynamo I.C.2 in conjunction with a 2 1/2 turn C.A.V. type regulator on car 35.EX. The…

img208 Test results of battery charging current after a run and subsequent examination of the dynamo commutator.
View original record -2- Rm/RC.1/JH.11.7.38. Test (3) At the end of the run, the current going into the battery with only the ignition and petrol pumps on, had risen to 16 or 17 amperes. This was mainly due to the…

img209 Requesting the replacement of a burnt-out series coil on chassis 7.B.V.
View original record To HPS: from Rm/RC. c. RC/CAP. 6017 Rm/RC.5/MH.13.7.38. RE CHASSIS 7.B.V. We find that the series coil of the cutout on the above car has been accidentally burnt out. Will you please arrange for a new…

img210 Requesting the removal and refitting of a Lucas regulator on car B.56.BN.
View original record 6092 To HPS. from Rm/RC. c. RC/CAP. Rm/RC.9/MH.19.7.38. LUCAS REGULATOR ON B.56.BN. Will you please arrange for the special Lucas regulator at present on car B.56.BN., to be removed. The Lucas unit…

img211 Requesting the replacement of a faulty experimental C.A.V. regulator on car 35-EX.
View original record To HPS. from Rm/RC. c. RC/CAP. 6092 Rm/RC.7/MH.19.7.38. C.A.V. REGULATOR ON 35-EX. The experimental 2 1/4 turn regulator No.66303 fitted on car 35-EX is reported to have failed occasionally through…

img212 The performance characteristics and agreed settings for a C.A.V. Type Regulator with 2 1/4 turns.
View original record ' 6092. To By. c. to Da. c. to By/RD. Rm/RC.5/JH.19.8.38. C.A.V. Type Regulator with 2 1/4 turns. The 2 1/4-turn type of regulator was introduced as the result of our request, to the makers that the…

img213 Specification for C.A.V. Type Regulator B.2.CS/11 for Chassis Dynamos, outlining electrical performance tests.
View original record SPECIFICATION No.E1.4/1. C.A.V. Type Regulator B.2.CS/11 (2 1/4 turn). Chassis Dynamos. "The overall dimensions, and external finish to be as shewn on drawing D.55030. The regulator shall be mounted…

img214 Page detailing a test procedure concerning amperes and regulator adjustment.
View original record -2- between 17 and 18 amperes. At the end of this test the regulator adjustment as specified in para. 1, and 2 shall not have altered.

img215 The replacement of an overheated and damaged Lucas R.R. type regulator cutout unit on car 8.B.V.
View original record 6092. To HPS/WSC. c. to RC/CAP. Rm/RC.9/JH.1.9.38. R.R. Type Lucas Regulator. Lucas R.R. type regulator cutout unit, No.II, at present on car 8.B.V. has been overheated and damaged. As this car is…

img216 Comparing output figures for voltage regulators from a supplier and internal drawings, highlighting discrepancies and requesting further testing.
View original record To Rm/RC. 6092 BY/RD.4/B.6.9.38. REGULATORS. We have obtained from Messrs. Lucas the identification number by which the new 2 1/2 turn regulator is to be known, i.e. B.2.CS/11. Included with the…

img217 New Cutout and Regulator Unit for Bentley III and Bentley 50 models, replacing a previous mock-up.
View original record 6092- RC To HPS c. DY c. Rm/RC. c. RBC/Ald. (O.P. Dept.). c. REC/SS BY/RD.1/B.7.9.38. BENTLEY III AND BENTLEY 50. Cutout and Regulator Unit - Sec.8290. We hand you herewith LOP. DB.1922 - Cutout and…

img218 Instruction memo regarding sending covers to Messrs. Lucas for regulator protection.
View original record -2- Six covers - D.54551 should be sent to Messrs. Lucas to provide protection for regulator during transit. This completes the instructions. BY/PD.

img219 Damaged and overheated Lucas type regulator cutout unit removed from car 8.B.V.
View original record To HPS. c.c. to Rm/FD. c.c. to Rm/IMW. c.c. to Rm/RC/CAP. 6092. Rm/RC.11/JH.20.9.38. Damaged Cutout off 8.B.V. The R R. Lucas type regulator cutout unit No.2 has been removed from car 8.B.V. on…

img220 Incorrect resistance value in the regulator resistance unit for a Wraith.
View original record 6092. By/RD. Rm/RC.17/JH.5.10.38. re regulator resistance unit for Wraith. We have examined one of the latest production units and find it has a resistance of 16 ohms instead of the specified 15 ohms.…

img221 Request to forward a speedometer and bulbs to Mr. I.M. Waller in France for testing.
View original record To DRS. from HPS/WSC. 6092- G/RES. Rm/RC. HPS/WSC.17/BA.26.10.38. 0/52483. Re: Testing in France 8-B-V. Will you please forward per Air Mail to-day certain to Mr.I.M.Waller, c/o Hotel-de-France,…

img222 Letter requesting further information to diagnose a faulty regulator causing a battery to overcharge.
View original record 6092. To Rm/IMW. Hotel de France, Chateauroux, Indre, FRANCE. Rm/RC.24/JH.26.10.38. With reference to your report of 25.10.38. in which you say that the regulator is out of order, and causing the…

img223 Communication regarding the dispatch of a speedometer suitable for a 9/37 back axle ratio.
View original record -2- Rm/RC.24/JH.26.10.38. We are sending under separate cover a speedometer suitable for the 9/37 back axle ratio. We were not notified of the change in ratio or we would have modified the speedometer…

img224 Issues with H.T. wire, distributor components, and proposed solutions.
View original record 6092. To REMTMW (struck through) Hotel de France, Chateauroux, Indre, FRANCE. Rm/RC.9/JH.31.10.38. We thank you for your memo. re regulator. We are running into trouble with the standard H.T. wire.…

img225 Swamping ratios and operating voltages for Lucas L.R.7. Regulators.
View original record R.C. 6092. BY/RD.5/B.6.12.38. LUCAS L.R.7. REGULATORS. Arising out of the discussion about 6 : 1 swamping of L.R.7. Regulators, Mr. Robinson of Lucas telephoned to us, the following information :-…

img226 Letter to Joseph Lucas Ltd. concerning a discrepancy in a regulator's swamp to coil resistance ratio.
View original record 6092 EXPERIMENTAL DEPARTMENT. Rm/RC.14/AH. 9th. December, 1938. Joseph Lucas Ltd., Great King Street, BIRMINGHAM. For the attention of Mr. Toulmin. Dear Sirs, In reply to your X/LGT/4 of November…

img227 Page 2 of a letter to J. Lucas Ltd., disclaiming responsibility for delays or issues arising from insufficient information from the maker.
View original record J. Lucas Ltd., -2- Rm/RC.14/JH.9.12.38. We could, of course, have discovered the advent of the 6/1 ratio ourselves by partly dismantling and measuring the resistances of all units as received, but…

img228 Letter to Joseph Lucas Ltd. arranging a visit to discuss outstanding points on the Lucas RR1 type regulator.
View original record 6092. EXPERIMENTAL DEPARTMENT. Rm/RC.7/JH. 15th. December, 1938. Messrs. Joseph Lucas Ltd., Great King Street, BIRMINGHAM. For the attention of Mr. Toulmin. Dear Sirs, Further to our telephone…

img229 Letter from Joseph Lucas Ltd. arranging a visit to discuss voltage regulator settings.
View original record JOSEPH LUCAS LIMITED HEAD OFFICES & WORKS: GREAT KING ST., BIRMINGHAM. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O. AND LEADING RAILWAYS. 'KING OF THE ROAD' LAMPS,…

img230 Letter discussing the procedure for checking a new regulator type RR1 used with a 5' dynamo.
View original record COPY TO MR. R.M. CHILDS, R-R. 6092 R.E. Davis, Esq., Messrs. Rolls Royce Ltd., DERBY. CER/W. 21st December, 1938. Dear Sirs, As arranged during the visit of the writer on Monday, the 19th, the…

img231 Procedures and results for dynamo and regulator testing at various speeds.
View original record 2. 21.12.38. R.E. Davis, Esq., Messrs. Rolls Royce Ltd., that the load characteristic should be checked by means of running up the set with a 10 amp load in circuit. This has been discussed in…

img232 Letter from Joseph Lucas Limited regarding the specification and testing of RR1 regulators.
View original record R.E. Davis, Esq., Messrs. Rolls Royce Ltd. 3. 21.12.38. suitable for limit values to be embodied in a working specification for the RR1 regulator. We are arranging to set the four regulators in our…

img233 Laboratory advice note detailing settings for four regulators.
View original record Regulator - Copy of Laboratory Advice Note No.3838. To: Mr.Toulmin. 23rd December,1938. EL/CER.W. Please receive herewith, For Messrs. Rolls Royce. 4 - Regulators. The settings are as follows:-…

img234 Requesting instructions for adjusting a faulty cutout on Car 25.G.VI.
View original record 6092. To' HPS. c. RC/CAP. Rm/RC.20/JH.4.1.39. Cutout on Car 25.G.VI. The cutout on the above car needs properly adjusting, and should be removed and handed to the Elect. Lab. for this purpose, the…

img235 Letter to Joseph Lucas Ltd. detailing test results for four R.R.1. type regulators.
View original record EXPERIMENTAL DEPARTMENT. Rm/RC.10/JH. 10th. January, 1939. Messrs. Joseph Lucas Ltd., Great King Street, BIRMINGHAM. For the attention of Mr. C.E. Robinson. Dear Sirs, We received the four R.R.1. type…

img236 Technical memorandum detailing the testing and specification for adjusting a regulator, including a table of output results.
View original record -2- Rm/RC.10/JH. 7th. January, 1939. [Handwritten: Cle] volts is nearer to 15.9 to 16.3 volts. As a check on this we readjusted unit RR.1 III first to 16.3 volts and then to 15.9 volts. The…

img237 Letter detailing test procedures for a regulator, specifying voltage and amperage outputs under certain conditions.
View original record -3- Rm/RC.10/JH. 7th. January, 1939. of 3.0 and 8.5 amperes. (4) Should the adjustment of the regulator appear to be wrong from tests (2) and (3), it may be checked by observing the open-circuit…

img238 Test results for four RR1 type regulators adjusted by Messrs. Lucas, operating on an R.R. dynamo.
View original record -4- Rm/RC.10/JH. 7th. January, 1939. Results obtained on four RR1 type regulators, specially adjusted by Messrs. Lucas, to operate on an R.R. dynamo running at 4,000 r.p.m., at an open circuit voltage…

img239 Summary of test results for electrical regulators comparing different manufacturers and modifications.
View original record Regulator. Test. Amps at 13.5v. through A. Amps at 15.5v. through A. O.C. Volts. R.R.1. No.4. R.R. 18.5a. 6.0a. 16.1v. Lucas. 16.0a. 6.0a. 16.0v. LT.1736. No. 4 Returned by R.R. R.R. 21.8a. 12.1a.…

img240 Arranging for the despatch of two Lucas RR.1 type regulators for examination.
View original record 6092 To Roy/Ms. c. to RC/CAP. c. to G/JWH. Rm/RC.21/JH.11.1.39. Lucas RR.1 Type regulators. Will you please arrange for the despatch to Messrs. Lucas of two of their RR1 type regulators Nos. RR1-III…

img241 Letter to Joseph Lucas Ltd. regarding a modification to dynamo field coils and regulator compatibility.
View original record Regulator 6092. EXPERIMENTAL DEPARTMENT. Rm/RC.5/JH. 14th. January, 1939. Messrs. Joseph Lucas Ltd., Great King Street, BIRMINGHAM. For the attention of Mr. C.C. Robinson. Dear Sirs, It has become…

img242 Letter from Joseph Lucas Limited regarding the modification of dynamo field coil resistance.
View original record HEAD OFFICES & WORKS: GREAT KING ST., BIRMINGHAM. CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE, G.P.O. AND LEADING RAILWAYS. 'KING OF THE ROAD' LAMPS, HORNS. 'CYCLEALITIES'…

img243 Specification for the Lucas regulator type RR.1 (Single Contact).
View original record 6092 To By. c. to Da. c. to By/RD. Specification No. ELC.7.S. Lucas regulator type RR.1 (Single Contact). This regulator as received from the makers, is to be complete with base, but without the…

img244 Page 2 of a regulator testing procedure, detailing current, voltage, and RPM specifications.
View original record -2- Rm/EC.19/JH.18.1.39. The current should then lie between the limits 3.0 and 8.5 amperes. Note. Should as a result of tests (1) and (2) the adjustment of the regulator appear wrong, it may be…

img245 Wiring diagram for the testing arrangement of a Lucas R.R.I type regulator.
View original record ELC7S. ARRANGEMENT FOR TESTING LUCAS R.R.I TYPE REGULATOR, 11 . 1 . 39, F, A, A1, E, D, C, +, V, A

img246 Inquiring about the resistance specifications for the LR.7 voltage regulator compared to the C.A.V. regulator.
View original record C.A.P. Please note and return. RC. To Rm/RC. 6092. BY/RD.2/B.20.1.39. VOLTAGE REGULATORS. The resistance of the field windings relative to the voltage regulator, has in the past, with the C.A.V.…

img247 Suitable resistance value for the dynamo field as governed by the regulator.
View original record 6092, To By/RD. Rm/RC.14/JH.24.1.39. re regulators. With reference to your memo. By/RD.2/B.20.1.39. the most suitable value for the resistance of the dynamo field as governed by the regulator, applies…

img248 Authorizing the withdrawal of 12 sets of Dynamo Brushes from production stock.
View original record 6093. Rm/RC. [REDACTED] [REDACTED] RC Roy/NC.1/AW.3.2.39 Please take ex Production Stock:- 12 sets of Dynamo Brushes (24 Brushes) to D.75474. against o/52444. Roy AW [Signature]

img249 Regulator part sent to the makers for examination.
View original record 6092- To Roy/Ms. c. to G/JWH. Rm/RC.3/JH.24.2.39. Please note that one regulator No.LT.1786-IV. as referred to in Roy/Fs.11/P.12.1.39. has now been handed to us by the Lucas representative. RR1-111…

img250 Correspondence regarding a dynamo fault and potential solder melting point issue on Chassis No. 3.BT-65 for a Mr. Denis Becker.
View original record 6092 CHILDS W/S - C. c. to Rm. c. to Mx. c. to N. c. to Hd. c. to By/RD c. to D/BP. BY/SB.1/MG.5.4.39 CHASSIS NO. 3.BT-65 - Denis Becker Thanks for your H.8/H.4.5.39, from which it would appear that…

img251 Letter to Joseph Lucas Ltd. detailing the results of tests on six RR1 type regulators.
View original record 6092 EXPERIMENTAL DEPARTMENT. Rm/RC.5/JH. 12th. May, 1939. Messrs. Joseph Lucas Ltd., Great King Street, BIRMINGHAM.19. For the attention of Mr. C.E. Robinson. Dear Sirs, We have now completed our…

img252 Page two of a letter to Joseph Lucas Ltd. regarding issues with unit performance during a heating run.
View original record -2- Joseph Lucas Ltd., 12th. May, 1939. seriously) which we have always attributed to a variation in either the contact surfaced or the controlling spring pressure. For example with unit No.Xl and to…

img253 Test results for six Lucas RR.1 type regulators, tested against a specific specification.
View original record Six Lucas RR.1 type regulator DB.1923. Tested to Specification No. ELC.7.S.18.1.39. Unit No. | Output at 13.5 volts (a) | Output at 15.5 Volts (A) | O.C. Volts. Cold | Cold | Hot | Cold | Hot | VII. |…

img254 Sourcing C.A.V. type regulators for the last 40 Wraith cars.
View original record To By. c. to By/RD. c. to Les. 6092 Rm/RC.9/JH.22.8.39. We are informed by Les. that it is impossible to obtain C.A.V. B2CS11 type regulators to D.55030 for the last 40 Wraith cars, as Messrs. Lucas…

img255 The Lucas regulator on the Dash Ripplet.
View original record To Ev/HH. c. to Rm. c. to Rm/RC. c. to Rm/RJH. Elec 1092 Ev.15/JH.12.3.40. Lucas regulator on Dash Ripplet. We are informed that Rm/RC. has built up a Lucas regulator on the dash board for the Ripplet…

img256 Technical description and diagram of the 'Newtons' voltage regulator, with comparisons to other types.
View original record To Ev. from Rm/RC. "NEWTONS" VOLTAGE REGULATOR. DIAGRAM LABELS: ELECTRO MAGNET FROG SPRING CARBON DISCS THREADED ON PORCELAIN ROD. CARBON WASHER INSULATED FROM FRAME. PORCELAIN TUBE ARMATURE EXCITING…

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