Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Letter of enquiry to Messrs. Peto & Radford regarding the use of Cadmium Electrodes for testing accumulator cells. | ||
| View original record | V4049 EFC6/T. 24th January, 1928. Messrs. Peto & Radford, 50, Grosvenor Gardens, London, S.W.1. Dear Sirs, Re Cadmium Electrode. We should be interested to know your experiences, if any, in the use of… | ||
| Scan002 | Letter from Peto & Radford regarding the use of Cadmium Electrodes for testing accumulator plates. | ||
| View original record | X.4049. Works, Dagenham Dock, Essex TELEPHONE VICTORIA 3667. 4 LINES PRIVATE BRANCH EXCHANGE. TELEGRAMS CONCENTRATION, SOWEST, LONDON. Manufacturers of P&R Accumulators. Established 1889 PETO &… | ||
| Scan003 | Letter from Peto & Radford regarding the use of Cadmium in testing starter batteries. | ||
| View original record | PETO & RADFORD. CONTINUATION 1. E.Fowler Clark Esq. January 28th 1925. of about 1/8" thickness, and the negative was merely a perforated lead envelope. This was sent out in a fully charged condition,… | ||
| Scan004 | Letter discussing the use and interpretation of readings from a cadmium electrode for secondary batteries. | ||
| View original record | X 4049 EFC3/T. 29th January, 1925. Messrs. Peto & Radford, 50, Grosvenor Gardens, London, S.W.1. For the attention of Mr. Peto. Dear Sirs, Re Cadmium Electrode. Thank you very much for the full… | ||
| Scan005 | Letter discussing the practical value and purpose of a cadmium stick. | ||
| View original record | -2- appreciate the value of it, or was it that it was of not much value practically ? Further, we take it that the protection on the cadmium stick is merely for the purpose of preventing contact with… | ||
| Scan006 | Laboratory report on the impurities found in a Cadmium Rod sample. | ||
| View original record | X4049 EFC. H14/EA5225 Laboratory. Re Sample of Cadmium Rod. This was found to contain about 0.04% Iron and only negligible traces of other impurities including Zinc. H1. HE | ||
| Scan007 | The interpretation of voltage readings in a secondary cell using a cadmium electrode. | ||
| View original record | X.4049 EFC1/T2.9.25. RE CADMIUM ELECTRODE. On a secondary cell discharged down to 1.80 volts, and discharging, but otherwise in good condition, the positive plate should be 2.05 volts positive to the… | ||
| Scan008 | Page detailing the correct condition of battery elements during discharge. | ||
| View original record | -2- Contd. that one of the elements is in wrong condition. Therefore the final decision as to the correct condition of the elements must be arrived at by allowing the battery to discharge to a… | ||
| Scan009 | Chart of readings for use with a Cadmium Electrode Voltmeter, showing voltage ranges for good cells. | ||
| View original record | X4049 VOLTAGE READINGS TO CADMIUM. FULLY CHARGED & CHARGING +2.5 +2.0 +1.0 0 -.3 -1.0 VOLTAGE READINGS TO CADMIUM. DISCHARGED & DISCHARGING +2.5 +2.05 +1.0 +.25 0 -1.0 -.--.-.--.-. READING OF POSITIVE… | ||
| Scan010 | The machining properties of cadmium, noting its softness and tendency to bend. | ||
| View original record | X4049 To EFC from RHC. RHC4/BE. 7.12.25. We have machined the Cadmium and made parts in accordance with your sketch. This material machines very well but it is so soft that it easily bends. Herewith… | ||
| Scan011 | The investigation into the utility of the cadmium electrode to test the condition of any cell. | ||
| View original record | EFC. JB.116. X.4049. 1.9.25. X.4049 - THE CADMIUM ELECTRODE See also sheets 22.4.26. The following is a report on the investigation of the utility of the cadmium electrode, as an instrument to test… | ||
| Scan012 | Table of test results for various types of electrical cells under different conditions. | ||
| View original record | -2- Type of cell tested. | Condition of cell. | Terminal voltage. | Positive Plate. | Negative Plate. ---|---|---|---|--- Fuller | Discharged with standing | 2.0 | 2.17 | .17 Hispano Slem. | " | 1.80… | ||
| Scan013 | Explaining the use of a cadmium electrode to test the electrical condition of positive and negative battery plates. | ||
| View original record | EFC. JC.22. X. 4049 22.4.26. X.4049. - RE CADMIUM ELECTRODE. The cadmium electrode is a very useful instrument for showing the electrical condition of the positive and negative plates. Cells which… | ||
| Scan014 | Page of test readings for various types of electrical cells showing their condition and voltage readings. | ||
| View original record | -2- Contd. Below are a few readings taken on various cells and it will be seen that some show positive weakness and others negative weakness. Type of cell tested. | Condition of cell. | Terminal… | ||
| Scan015 | Using a cadmium electrode for testing accumulator element condition. | ||
| View original record | Expt. Report. X4049 To R. from EFC. c. BJ. E. c. Da. Wor. c. By. FN. EFC1/T26.4.26. X.4049 - CADMIUM ELECTRODE FOR TESTING ACCUMULATOR ELEMENT CONDITION. In this connection we re-issue for convenience… | ||
| Scan016 | Continued document discussing battery cell design, ribbed separators, and voltage readings using a cadmium electrode. | ||
| View original record | Contd. -2- EFCL/T26.4.25. weakness on a quick discharge. From this point of view it is better to have separators ribbed on both sides, though frequently separators are flat on the surface in contact… | ||
| Scan017 | Table of test results for various battery cells under different conditions, with a recommendation for testing methodology. | ||
| View original record | Contd. -3- EFC1/T26.4.26. Type of cell Tested. | Condition of cell. | Terminal Voltage. | +ve plate >2.05 | -ve plate <0.25… | ||
| Scan018 | Data sheet showing cadmium readings for various types of battery cells. | ||
| View original record | X4049 CADMIUM READINGS. Type of cell. | Terminal P.E. | + Reading. | - Reading. | Weakness. | Density. | Condition. Exide MA3. | 2.45 | 2.40 | -.05 | - | 1250 | Fully charged & charging. FA.11. | 2.55… | ||
| Scan019 | Instructions regarding Cadmium readings on batteries under various charge and discharge conditions. | ||
| View original record | R.R. 236 (150 BKS.) (DB 431-B 12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.F.C. Order No. JC104 Customer's No. X4049 Re Cadmium Readings on Batteries in various conditions. Below are some… | ||
| Scan020 | Set of crucial instructions and maintenance advice for accumulator users. | ||
| View original record | X4049 2.12.27. TO ACCUMULATOR USERS. X664 (who should read and assimilate every sentence most carefully). Do not interpret the instructions contained on the maker's label as you would interpret an… | ||
| Scan021 | Set of instructions on how to store a battery (accumulator) and warnings about potential damage from improper maintenance. | ||
| View original record | - 2 - Contd. (1) Fully charge. (2) Empty out acid electrolyte. (3) Fill with pure distilled water. (4) Discharge at normal rate down to 1.8 volts per cell. (5) Remove terminals, clean, regrease and… | ||
| Scan022 | Page discussing the diagnosis and faults of accumulator (battery) plates. | ||
| View original record | -3- Contd. restore them to their correct condition. If you are partially lax in these respects you will find that it is the negative plates which mainly suffer and that an abnormal amount of charging… | ||
| Scan023 | Cautionary note on purchasing accumulators with celluloid components. | ||
| View original record | -4- Contd. Never purchase accumulators in celluloid cases unless these are made up of separate cell boxes - celluloid partitions frequently develop leaks. Never purchase accumulators with celluloid… | ||
| Scan024 | Technical bulletin detailing the condition and maintenance of accumulator (battery) elements. | ||
| View original record | 1A. ACCUMULATOR ELEMENT CONDITION. Prolonged experience with accumulators of various types has enabled us to arrive at certain conclusions leading to a rather more practical statement than is usually… | ||
| Scan025 | Continued report on battery cell maintenance, focusing on charging issues with positive and negative plates. | ||
| View original record | -2A- Contd. If in any cell on charge the negatives do not gas easily as soon as the positives, our experience indicates that at some time the battery has been wrongly treated in respect of one or the… | ||
| Scan026 | Technical note on the use of a Cadmium Electrode for assessing battery cell condition. | ||
| View original record | -3A- Contd. Cadmium Electrode. The Cadmium Electrode is a useful laboratory device for showing up the electrical condition of the positive and negative elements. It is hardly suitable for the use of… | ||
| Scan027 | The voltage characteristics and fault diagnosis during the charging of a battery cell. | ||
| View original record | -4A- Contd. In the process of charging a normally good and new cell, the positive element should gradually increase from 2.05 volts positive to the cadmium before charging to 2.50 volts positive at… | ||
| Scan028 | Chart of readings for use with a Cadmium Electrode Voltmeter. | ||
| View original record | VOLTAGE READINGS TO CADMIUM. FULLY CHARGED & CHARGING. POSITIVE NEGATIVE VOLTAGE READINGS TO CADMIUM. DISCHARGED & DISCHARGING. READING OF POSITIVE ELECTRODE TO CADMIUM READING OF NEGATIVE ELECTRODE… | ||
| Scan029 | Request for a hydrometer to measure the specific gravity of petrol and accumulator electrolyte, preferably a single instrument for both jobs. | ||
| View original record | From E. Copy to EFC. X.374T 19th August, 1918. E3/G19818. RE HYDROMETER FOR MEASURING SPECIFIC GRAVITIES OF PETROL AND ACCUMULATOR ELECTROLYTE. Would you kindly send Mr. Royce, in accordance with his… | ||
| Scan030 | Responding to an enquiry about the manufacturer of a syringe type acid hydrometer. | ||
| View original record | X8741 To EH. from E. X.3035 - RE ACID HYDROMETER 11th Sept. 1918. E4/G11918. In response to your enquiry as to the nameoof the firm who make the syringe type of hydrometer, I fear I cannot give you… | ||
| Scan031 | To Mr. Hives regarding a quotation received for a hydrometer and comparing it to a recent purchase. | ||
| View original record | R. 238 a (500 T) (S E. 427, 21-2-18 G. 189 x 3741 Experimental Dept. Mr. Hives. Wd/W3/H20918. 20th September 1918. We attach herewith a quotation we have received from Messrs J.J.Griffin & Sons Ltd.,… | ||
| Scan032 | Letter from John J. Griffin & Sons Ltd. offering a Pipette Hydrometer for sale. | ||
| View original record | JOHN J. GRIFFIN & SONS, LTD MAKERS OF PHYSICAL, ELECTRICAL & SCIENTIFIC INSTRUMENTS & APPARATUS. TELEGRAMS: GRAMME, WESTCENT, LONDON. TELEPHONE: GERRARD 2621 (3 LINES). A.B.C. CODE 5TH EDITION.… | ||
| Scan033 | Requesting the purchase of four syringe-type hydrometers for battery acid. | ||
| View original record | X.2036 X2741 To. Miss Williamson. from EFC. EFC4/L.191018. RE HYDROMETER FOR BATTERY ACID. Will you kindly note that the syringe type hydrometer recently handed over to us, was satisfactory.… | ||
| Scan034 | Letter from a battery company regarding an out-of-stock order for hydrometer syringes. | ||
| View original record | The British Willard Battery Company, Limited. TELEGRAPHIC ADDRESS: "SWILLARDZA, LONDON" TELEPHONE: 9295 CENTRAL. LBA Willard STORAGE BATTERY LBA 46, POLAND STREET, LONDON, W.1 S.D. Nov. 4th 1918.… | ||
| Scan035 | Recommending the inclusion of a celluloid syringe type hydrometer in the tool kit for each chassis. | ||
| View original record | X.3741. To R. From EFC. c. to CJ. c. to Bn. ------------- EFC5/T6.11.19. ------------- X.3634. X.664. ------- X.3741. - RE SYRINGE TYPE DYDROMETER. ---------------------------------- Would you… | ||
| Scan036 | Sourcing celluloid syringe-type hydrometers for inclusion in the chassis tool kit. | ||
| View original record | R.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. X. 3741. To O.O. from EFC. EFC6/T6.11.19. X. 3741. - RE SYRINGE TYPE HYDROMETERS. X. 3634. X. 664. Will you kindly send out enquiries to see if we… | ||
| Scan037 | Letter from Joseph Casartelli & Son requesting further particulars for a Celluloid Syringe type Hydrometer. | ||
| View original record | H.R. 253 s. 100 T/d P. 275. 16-4-19) G. 2354. x3741 JOSEPH CASTARTELLI & SON. 43, Market Street, Manchester. Nov, 15th 1919. Messrs. Rolls-Royce Ltd. Nightingale Road. D E R B Y. Gentlemen, Your ref.… | ||
| Scan038 | Letter from a supplier unable to fulfill an order for a Celluloid Hydrometer Syringe, redirecting to the American manufacturer. | ||
| View original record | X3741 UNITED MOTOR INDUSTRIES? LIMITED. 45 - 46 Poland Street, LONDON. W. Nov, 17th 1919. Messrs. Rolls-Royce Ltd., Nightingale Road, DERBY. Dear Sirs, CELLULOID HYDROMETER SYRINGE, YOUR REF. Wd13/R… | ||
| Scan039 | Inquiry to The Chloride Electrical Storage Co. regarding Syringe type Hydrometers and the use of celluloid instead of glass. | ||
| View original record | X 3741. Wd//16/R19.11.19. Nov. 19th 1919. The Chloride Electrical Storage Co., Clifton Junction, Near MANCHESTER. Dear Sirs, We notice some particulars in your catalogue re- garding the Syringe type… | ||
| Scan040 | Quotation from The Chloride Storage Co. Ltd. for syringe type hydrometers, with a discussion on glass versus celluloid tubes. | ||
| View original record | X.3441. THE CHLORIDE STORAGE CO. LTD. Clifton Junction, Nr. Manchester. 20th Nov. 1919. Messrs. Rolls-Royce Ltd. Nightingale Road, D E R B Y. Dear Sirs, Your reference:- Wd//16/R19.11.19. We are… | ||
| Scan041 | Inclusion of a syringe-type hydrometer in the tool kit and seeking approval to source them in celluloid. | ||
| View original record | To Bn. from EFC. EFC2/T27.11.19. X.3741 X.664 X.3741 - SYRINGE TYPE HYDROMETER X.3634 X.664 Mr. Royce has not replied to my enquiry EFC5/T6.11.19, as to whether we should include a syringe type… | ||
| Scan042 | The preference for celluloid type syringe hydrometers over glass ones for tool kits. | ||
| View original record | R.R. 248 B 200 T) (S.F. 623, 22-3-19) G. 2374. X.3741 To Ck. from Bn. Bn20/W281119. X.3741. RE SYRINGE TYPE HYDROMETER. X 3634 X 664 With reference to EFC2/T271119 we should continue with our efforts… | ||
| Scan043 | Unsuitability of a sample glass hydrometer and efforts to source a celluloid alternative. | ||
| View original record | To C.O. from EFC. EFC3/T1.12.19. X.3741 - SYRINGE TYPE HYDROMETER We return herewith the Glass Syringe type Hydrometer which you obtained for us as a sample from the Chloride Electrical Storage… | ||
| Scan044 | Quotation letter from Luthy Hydrometer Co. for non-breakable celluloid hydrometers. | ||
| View original record | R R. 235 a (100 T) (N.F. 846 6-8-19) G 2400 X2741 COPY LUTHY HYDROMETER CO. 97, WOODWARD AVENUE, DETROIT, MICH: Dec. 8th 1919. Messrs. Rolls-Royce Ltd., Nightingale Road, Derby, England. Gentlemen: It… | ||
| Scan045 | Request for approval to supply a hydrometer with each 40/50 Chassis kit. | ||
| View original record | R.R. 233A (100 T) (S.P. 846. 6-8-19) G. 2460. X.3741. To H. from Bn. To Cl. " To Wpe. Copy to Ck. Bn3/W3.1.20. X.3741. Re Supply of Hydrometers with kit for | ||
| Scan046 | Request to obtain particulars for floating glass hydrometers to measure acid densities. | ||
| View original record | To O.O. from Ck. X3741. Ck1/AT15.1.20. X.3741.-HYDROMETERS. X.2065. Will you kindly obtain particulars from Messrs.Preston of Barker's Pool, Sheffield, of the floating type, glass Hydrometers suitable… | ||
| Scan047 | The selection and supply of hydrometers for delivered chassis. | ||
| View original record | Ck. from EP. c. to Bn. [struck through] c. to WD. [struck through] X.3741. EP/T19/F16.1.20. X 3741. RE. HYDROMETERS. With reference to Bn's memo. to you Bn4/W16120 I should like to know what type of… | ||
| Scan048 | Confirming the decision to supply a hydrometer with the 40/50 HP chassis kit, including for those already delivered. | ||
| View original record | R.R. 235 a (200 T) R.F. 673. 22-5-19 (?) 7314. To Ck. from Bn. C. to D. " BP. " Wd. X.3741 Bn4/W16120. X.3741. RE HYDROMETERS. X 36 34 With reference to the question of supplying an hydrometer with… | ||
| Scan049 | Supply of celluloid syringe type hydrometers from the Luthy Hydrometer Company in America. | ||
| View original record | X.3741 16-1-20 To EP. from Ck. c. to Wd. Ck8/Tl&.1.20. X.3741 - HYDROMETERS The type of hydrometer we propose to supply is made by the Luthy Hydrometer Company in America, and is of the celluloid… | ||
| Scan050 | Instructing to order and supply Luthy hydrometers for all new and previously delivered chassis. | ||
| View original record | R.R. 225 A (100 T) (R.F. 846. 6-8-19) C. 2460 To Wd. from Ck. c. to Hn. c. to EP. c. to Hy. X3741 C&S/T16.1.20. X.3741 - HYDROMETERS FOR CHASSIS. X 3634 You will have noted from Em4/W16.1.20 that both… | ||
| Scan051 | Letter from J. Preston regarding the availability of Hydrometers, with a subsequent order from Rolls-Royce. | ||
| View original record | X.3441. J. PRESTON. 105, Barker's Pool, SHEFFIELD. EP/MB. 17.1.20. Messrs. Rolls-Royce. Ltd., Nightingale, Road, D erby. Dear Sirs, In reply to your favour Wd/W19/R of the 16th inst., we regret we… | ||
| Scan052 | Request to obtain two glass syringe type hydrometers for the Experimental Department from the Chloride Electrical Storage Co. | ||
| View original record | R.R. 235 B (50 T) (R.G. 504 8-1-20) G. 7585. To Wd/Ms. from EFC. X.3/41 EFC9/T27.4.20. X. 2065 - SYRINGE TYPE HYDROMETERS. Will you kindly obtain for our use in the Expl. Dept. two glass type syringe… | ||
| Scan053 | The supply of Luthy Hydrometers for new and previously delivered chassis. | ||
| View original record | EFC CK. F.R. X.3741 EP/CEP34/DJ10.6.20 X.3741 re Luthy Hydrometers ------------------ Now that it has been arranged to supply the above in the spares of all chassis despatched from and including… | ||
| Scan054 | Booking out of two hydrometers from the stores for the Experimental Department. | ||
| View original record | X.3741 To Wd/Ms. from EFC. EFC3/T11.6.20. X.3741 - HYDROMETERS. Will you kindly note that we are booking out Xof the Stores two of the hydrometers recently received, for our use in the Experimental… | ||
| Scan055 | Instruction sheet regarding the acquisition of two hydrometers from the stores. | ||
| View original record | RR 300 (120B) (SF 349 24-1-19) MP 200552 X.3741. 91023 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: S.7C. Order No: X.3741. Date: 14/6/20 Customer's No.: 41390. Re: Hydrometers. We have obtained from the… | ||
| Scan056 | Acquisition of Luthy Products Corp. and quoting prices for their hydrometers. | ||
| View original record | from Wd. c. to Roy. c. to EPC. X3741 RECEIVED NOV 7 1922 H8 Wd3/NJ7.11.22. Luthy Hydrometers. With further reference to mine Wd7/NJ27.10.22 and with reference to Roy12/MG30.10.22 and Byl/P7.11.22, I… | ||
| Scan057 | Urgent procurement of Luthy Hydrometers or a suitable alternative. | ||
| View original record | X. 3741 Wd. c. Roy. c. EFC. BY1-P7.11.22. LUTHY HYDROMETERS. Re Wd7/NJ/27.10.22. We should certainly without delay obtain the nearest existing type to the Luthy obtainable in this country. In any… | ||
| Scan058 | The continued use of Luthy hydrometers and sourcing potential English-made alternatives. | ||
| View original record | X3741 Wd. c.EFC. BY11-P22.11.22. X.3741. LUTHY HYDROMETERS. Referring to Wd3/NJ71122, we think it desirable to carry on with the present type of Hydrometer, as quoted above, as it has certainly given… | ||
| Scan059 | The stock, pricing, and alternative suppliers for hydrometers. | ||
| View original record | EFC. from ROY. O. to HY X3741 ROY1/MG25.11.22 Luthy Hydrometers We have roughly some 400 of these in stock, so have time available to make enquiries re alternative sources of supply. In the meantime… | ||
| Scan060 | Placing an order for a battery hydrometer with the Chloride Company and continuing with the Luthy Hydrometer. | ||
| View original record | X.3741 EFC. from ROY. ROY6/MG27.11.22 X.3741 - BATTERY HYDROMETERS Thanks for your note re above. We are accordingly passing the Chloride Company an order covering the Hydrometer in question, and… | ||
| Scan061 | Unsuitability of a sample Exide glass hydrometer for customer use due to its fragility. | ||
| View original record | X3741 To ROY. from EFC. EFC1/T27.11.22. X.3741- BATTERY HYDROMETERS Re your note ROY1/MG25.11.22 and the sample Exide hydrometer submitted to us, we do not think it would be satisfactory to put these… | ||
| Scan062 | Continuation of notes on the design features of a ribbed bulb and a float with glass prongs. | ||
| View original record | Contd. JB.16. (5) The bulb is ribbed to prevent rolling and need only be compressed slightly to get sufficient acid for a reading. (6) Glass prongs are fitted to the float to prevent it from sticking,… | ||
| Scan063 | Comparison report on Perfection and Exide hydrometers. | ||
| View original record | x3741 To HY. From EFC. c. EP. EFC1/T28.8.23. X.3741 - RE COMPARISON OF PERFECTION AND EXIDE HYDROMETERS. Herewith please receive copy of my assistant's report on the comparison of the two hydrometers… | ||
| Scan064 | Comparison report on Exide and Perfection make syringe hydrometers. | ||
| View original record | EFC. JB 16. 18.8.23. X.3741 - RE COMPARISON OF SYRINGE HYDROMETERS. Two syringe hydrometers, one of the Exide make and the other Perfection were compared with the standard Twaddell hydrometer in… | ||
| Scan065 | Battery tester submitted by The Runbaken Magneto Company Ltd. and its pricing. | ||
| View original record | V3741 EFC. from ROY. ROY4/MG16.10.23 Herewith Battery Tester submitted by The Runbaken Magneto Company Ltd., of Manchester, which may be of interest. They are offering supplies @ 10/6d less 20% and… | ||
| Scan066 | The unsuitability of the Runbaken Syringe Hydrometer for chassis use following a test. | ||
| View original record | X3741 To ROY, from EFC. EFC5/T12.11.23. X.3741 - RUNBAKEN SYRINGE HYDROMETER. Herewith copy of my assistant's report on the test of this hydrometer. It is not considered that this hydrometer would be… | ||
| Scan067 | Re-test report on a Runbaken syringe hydrometer, comparing its accuracy against standard Twaddell hydrometers. | ||
| View original record | EFC. COPY 31.10.23. RE TEST ON RUNBAKEN SYRINGE HYDROMETER. This hydrometer was compared with the standard Twaddell hydrometers in various strengths of acid, for accuracy in reading. The results are… | ||
| Scan068 | Page noting a design flaw where a rubber bulb works loose from a barrel, suggesting a locking arrangement. | ||
| View original record | -2- Contd. (13) With use the rubber bulb gradually worms its way out of the barrel and if not noticed is liable to allow the barrel and float to drop and breaking the glass float. Therefore some… | ||
| Scan069 | Using the Exide Hydrometer as an alternative for the American Luthy Hydrometer. | ||
| View original record | X.3741 Mr Booth. c. EFC. BY1-P19.11.23. X.3741. HYDROMETERS. It has been agreed in the event of us not being able to obtain Luthy Hydrometers in time from America, that we shall use the Exide… | ||
| Scan070 | Letter from The Runbaken Magneto Co. Ltd. responding to feedback on their battery tester and hydrometer. | ||
| View original record | X3741 THE RUNBAKEN MAGNETO CO.LTD. DERBY STREET, MANCHESTER. D/JHR/ET. ROY12/MG13.11.23. Nov. 19th 1923. Messrs Rolls-Royce Limited, Derby. Dear Sirs, We thank you for your letter of the 13th inst.… | ||
| Scan071 | Cover note regarding a letter from the Runbaken Magneto Company in reply to criticism of their Battery Tester. | ||
| View original record | X.3741. EFC. from ROY. ROY7/MG21.11.23 Attached is the Runbaken Magneto Company's letter of the 19th instant in reply to our criticism of their Battery Tester. Kindly advise if you have any comments.… | ||
| Scan072 | The quality of a hydrometer sample submitted by Messrs. Runbaken for standardisation. | ||
| View original record | X.3741 To ROY. from EFC. EFC1/T22.11.23. X.3741 - HYDROMETERS. Answering your ROY7/MG21.11.23 our comments on this matter are that the sample submitted to us is not, generally speaking, as good as… | ||
| Scan073 | One standard Exide hydrometer to be issued from the stores. | ||
| View original record | X.8741 To BP. from EFC. EFC1/T17.12.123. RE EXIDE HYDROMETER. Will you kindly have booked out and charged to me:- One standard Exide hydrometer. I should be obliged if you would instruct the Stores to… | ||
| Scan074 | Design flaws in Exide hydrometers following a comparative test. | ||
| View original record | To BY/C. from EFC. EFC4/T19.5.24. X3741 X.3741 - EXIDE HYDROMETERS. With reference to the two Exide hydrometers which you handed to us for comparative test, please find attached copy of my assistant's… | ||
| Scan075 | Typed memorandum discussing improvements to a new type and the return of two hydrometers. | ||
| View original record | Contd. -2- EFC4/T9.5.24. The other points about the new type, are considered to be improvements. We return the two hydrometers herewith. Copy of JA.16 of 18.8.23 was sent to BY. under cover of our… | ||
| Scan076 | Comparison of a standard Exide syringe hydrometer with a new type Exide syringe hydrometer, detailing good and bad points. | ||
| View original record | COPY EFC. 16.5.24. JB.45. X.3741. COMPARISON OF SYRINGE HYDROMETERS. Two syringe hydrometers, one a standard Exide and the other a new type Exide, were compared with each other in various strengths of… | ||
| Scan077 | Supply delay for Type S.1 hydrometers and the testing of a new sample. | ||
| View original record | X.3741 EFC. BY/C14/H. 13.5.25. HYDROMETERS. We are informed by the Order Office that the Chloride Elec. Storage Co.Ltd. cannot let us have any supplies of their type S.1. Hydrometers for some three to… | ||
| Scan078 | Summarising tests on an Exide Hydrometer Type S1 and returning the instrument. | ||
| View original record | X.3741. To BY/C. from EFC. EFC2/T15.5.25. EXIDE HYDROMETER TYPE S1. X.3741. We have now made tests on this hydrometer and attached please find my assistant's report JB.103., from which you will see… | ||
| Scan079 | The Exide Hydrometer Type S1, comparing its features to the standard model. | ||
| View original record | EFC. JB.103. X.3741. RE EXIDE HYDROMETER TYPE S1. This type of hydrometer appears to be quite good as compared with the standard type. Firstly, having a straight barrel it is much easier to clean and… | ||
| Scan080 | Requesting the testing of a sample hydrometer from L.P.M.A. Co. with a handwritten cost comparison. | ||
| View original record | X3741 To EFC. BY/HM2/K.12.11.25. We are sending you herewith a letter and sample of a Hydrometer which has been sent by the L.P.M.A. Co. Birmingham, and we shall be pleased if you will test same, and… | ||
| Scan081 | Testing and rejection of an L.P.M.A. syringe hydrometer. | ||
| View original record | X3741 To BY/HM. from EFC. EFC4/T17.11.25. X.3741 - L.P.M.A. SYRINGE HYDROMETER. Answering your BY/HM2/K12.11.25 re above hydrometer, this has been duly tested and please find attached copy of my… | ||
| Scan082 | Test report and critique of a sample L.P.M.A. Syringe Hydrometer. | ||
| View original record | EFC. JB.132. 16.11.25. L.P.M.A. SYRINGE HYDROMETER. This hydrometer was sent here for test as a sample from the L.P.M.A. Co. Birmingham to BY/HM2/K121125. The general remarks re this instrument are as… | ||
| Scan083 | Request to purchase two new type S.1 hydrometers, one for the Electrical Laboratory and another for private use. | ||
| View original record | X3741 To Wd. from EFC. EFC4/T17.12.25. X. 3741 - RE HYDROMETERS. Would you please obtain two new type S.1. hydrometers from The Chloride Elec. Storage Co., similar to the sample referred to in… | ||
| Scan084 | Request to obtain three floats for S1 type hydrometers from the Chloride Elec. Storage Co. Ltd. | ||
| View original record | To WH. from EFC. EFC2/T19.5.26. X5741 (handwritten) X.3741 - HYDROMETERS. Will you please obtain for the Elec. Expl. Dept, three floats only for S1 type hydrometers, from the Chloride Elec. Storage… | ||
| Scan085 | Comparing a U.S.A. made hydrometer with a British one, concluding the British instrument is preferred. | ||
| View original record | X3741 To EY/C. from EFC. EFCl/T25.6.26. X.3741 - HYDROMETERS. We return herewith the two hydrometers sent in for test, together with a copy of my assistant's report JC.34, from which you will see that… | ||
| Scan086 | Comparison of two syringing hydrometers, an Exide model and a U.S.A. made version. | ||
| View original record | EFC. 24.6.26. JC.34. RE COMPARISON OF SYRING HYDROMETERS. The comparison of the Exide S1 hydrometer and the S1 hydrometer made the The Electric Storage Battery Co. U.S.A. seems to be that they are… | ||
| Scan087 | The testing of an Exide hydrometer, noting considerable improvement and the return of the instrument. | ||
| View original record | XJ741 To BY/Cgh. from EFC. EFC2/T7.5.27. With reference to the Exide hydrometer recently submitted to us for test, attached please find copy of my assistant's report JC.81, & from which you will see… | ||
| Scan088 | Review and comparison of the new type S1 Exide hydrometer. | ||
| View original record | EFC. 5.5.27. JC.81. RE NEW TYPE S1 EXIDE HYDROMETER. This hydrometer is quite good and is better to use than the type which is being issued now. The square flange on the rubber nozzle, which is in one… | ||
| Scan089 | Test report on two types of hydrometers, a float type and a syringe type. | ||
| View original record | To Mr.Brock/Mr.Watson, X3741 EFC2/T8.6.27. RE HYDROMETERS HANDED TO US FOR TEST. Float type hydrometer. We find this to read quite correctly as compared with our large float standard. Syringe type… | ||
| Scan090 | Requesting the return of a faulty Exide hydrometer float for replacement. | ||
| View original record | To ROY. from EFC. X3741 EFC1/T9.6.27. EXIDE HYDROMETER. We hand you herewith an Exide hydrometer float. We should be glad if you would return this to the makers for replacement, as moisture appears to… | ||
| Scan091 | Quality control procedures for externally supplied hydrometers. | ||
| View original record | To [strikethrough] C. EFC. C. BY/HEB [strikethrough] X3744 BY/EM1/K. 13. 6. 27. HYDROMETERS. ----------------- We have found that occasionally the hydrometers received from outside are not accurate… | ||
| Scan092 | Free of charge replacement of a faulty S.1. Hydrometer. | ||
| View original record | X3741 EFC. C to Hy/WHH. ROY/JT11/HP15.6.27. Re Replacement Order R.5594. With reference to the type S.1.Hydrometer, piece number 916B recently returned to the Chloride Electrical Storage Co.Ltd. for… | ||
| Scan093 | The testing of syringe hydrometers, noting they are an earlier type. | ||
| View original record | EFC. X3791. 29.6.27. 1 doz. syringe hydrometers received for test were all found to read correctly when checked with the standard Twaddell hydrometers. These hydrometers were of the earlier type, and… | ||
| Scan094 | Instruction sheet for the loan of S1 hydrometers for testing. | ||
| View original record | RR 26 [10H BKS.] [DA944 5-7-24] MP 297056 X3741 ROLLS-ROYCE LTD. INSTRUCTIONS To: Mr E & L Clarke Date: Sept 8 / 1927 Order No.: Expl Dept 93700/70390 Customer's No.: 24 P624. S1 Hydrometers on Loan… | ||
| Scan095 | Test report on Exide type S1 hydrometers, detailing a reading error in two of the twenty-four instruments tested. | ||
| View original record | X3741 To Mt. for Mr.Bates. c. BY. EFC3/T8.9.27. EXIDE TYPE S1 HYDROMETERS. Of the 24 type S1 hydromters which we have received for test and which we understand represent 10% of a production quantity,… | ||
| Scan096 | Test report on 24 Exide Type S.1. Hydrometers, finding 23 to be satisfactory and one with a broken float. | ||
| View original record | To Ry/Cgh. from EFC. X3741 EFC4/T3.11.27. EXIDE TYPE S.1. HYDROMETERS. We have duly tested the 24 of these instruments sent to us fortest, and we find 23 of these to be O.K. in all respects. The… | ||
| Scan097 | Request for a replacement float for an S.1. hydrometer that became jammed. | ||
| View original record | X3741 To Roy. from EFC. EFC4/T30.1.28. FLOAT FOR HYDROMETER. QXNXXIII. We should be pleased if you would obtain a replacement float for the S.1. hydrometer herewith. This was not broken by careless… | ||
| Scan098 | Confirming the price being paid for Exide type S.1 hydrometers. | ||
| View original record | X3741 30.1.28. We have to-day received information from the O.O. that we are paying 3/6d. each for Exide type S.1. hydrometers. EFC. | ||
| Scan099 | Test report on 24 Exide Type S1 hydrometers, noting the absence of float spikes. | ||
| View original record | X 3741 To BY/HM. from EFC. EFC5/T31.1.28. 24 EXIDE TYPE S1 HYDROMETERS HANDED TO US FOR TEST REPRESENTATIVE OF 10% OF PRODUCTION. We have carefully checked these against our standard floating type… | ||
| Scan100 | Letter from The Chloride Electrical Storage Co. Ltd. regarding design modifications to the Exide Type S.1 Hydrometer. | ||
| View original record | EFC XJ741 COPY THE CHLORIDE ELECTRICAL STORAGE CO.,LTD., CLIFTON JUNCTION, NR. MANCHESTER. ECM/LJ. Messrs.Rolls-Royce, Ltd., DERBY. 7th February, 1928. Dear Sirs, re Exide Type S.1 Hydrometer. We beg… | ||
| Scan101 | Confirming the successful testing of 25 Exide type S1 hydrometers. | ||
| View original record | To EY/Mtn. from EFC. c. Central Stores. V3741 EFC3/T14.2.28. We have tested the 25 Exide type S1 hydrometers which were recently handed to us, and find these all to be O.K. We now return these to the… | ||
| Scan102 | Testing and standardisation of Exide hydrometers for production use. | ||
| View original record | X3741 To EY/Mtn. from EFC. c. Despatch Stores. EFC10/T8.3.28. The 25 Exide hydrometers recently sent to us for test have been tested and found reasonably correct. One of these has been selected as… | ||
| Scan103 | Suggesting the withdrawal of the battery hydrometer from the standard tool kit to save costs. | ||
| View original record | DY. from ROY. Hs. " " ETC. " " ------------- X.3741 ROY5/MG22.11.28 ------------- At present it is costing us about £200. a year to include a Battery Hydrometer in our Tool Kit. Now the Battery people… | ||
| Scan104 | Arguing for the inclusion of a hydrometer for testing battery electrolyte. | ||
| View original record | ROY. X.3741 c. HS. c. EFC. BY10/G.13.12.28. One important way of testing a battery is of course to check the gravity of the electrolyte. Every battery outfit that I know of supplies a hydrometer. For… | ||
| Scan105 | Arrangement for a semi-standard hydrometer to be returned for accuracy checks. | ||
| View original record | By/Mtn. from EFC. X3741 EFC2/AD5.11.29. X.3741. HYDROMETERS. Please refer to our EFC10/T6.3.28. We arranged for one hydrometer to be used as a semi-standard for checking on production. This was to be… | ||
| Scan106 | Follow-up memorandum regarding the use of syringe-type hydrometers as semi-standards for production chassis. | ||
| View original record | X3741. By/Mtn. from EFC. EFC2/AD30.4.30. X.3741. SYRINGE TYPE HYDROMETERS FOR PRODUCTION CHASSIS. May we please refer you to our EFC10/T8.3.28 and our EFC2/AD5.11.29. We selected one of the above… | ||
| Scan107 | Note on the Economy Committee's decision to cease testing syringe-type hydrometers upon receipt. | ||
| View original record | X3741. 5.5.30. With reference to syringe type hydrometers as per EFC2/AD30.4.30, EV. remarks as follows :- "Hydrometers used to be tested when received, but Economy Committee decided this was an item… | ||
| Scan108 | Reprinted article explaining the design and operation of the D.N. Shock Absorber. | ||
| View original record | Reprinted from 'THE AUTO MOTOR JOURNAL' of July 3, 1924. THE D.N. SHOCK ABSORBER ONE of the most successful of the shock absorbers and damping devices is the D.N., formerly known as the Derihon, which… | ||
| Scan109 | Blueprint of a Type II 'Derihon' shock absorber with various cross-sections. | ||
| View original record | Type II Ordinaire USINES G. DERIHON Amortisseur Derihon Grandeur d'exécution Plan G.D. 2945 Coupe d' c.d. Coupe d' a.b. Vue d'encombrement de l'appareil Coupe dans le volet suivant e.f. Coupe dans le… | ||
| Scan110 | Letter to The D.N. Shock Absorber Co. requesting a blueprint and an explanation of their product's superiority over the Houdaille shock absorber. | ||
| View original record | X.4046 Hs/Rml/LG. 3rd. Sept. 1925. Messrs. The D.N. Shock Absorber Co., 62, Oxford Street, London W.1. Dear Sirs, We should be interested to know if you could let us have a blue-print or sketch… | ||
| Scan111 | Request for samples of hydraulic shock dampers for review and discussion with Mr. Royce. | ||
| View original record | To Hs. from DA. 4046 DA1/M5.9.25. HYDRAULIC SHOCK DAMPERS. X. 8520 X. 4046 AS you know we are going into the question of a suitable hydraulic damper as far as we can. Mr. Royce instructs us to get any… | ||
| Scan112 | Letter from The D.N. Shock Absorber Co. arranging a visit to Derby. | ||
| View original record | TELEGRAMS: "HICREA," LONDON. TELEPHONE: MUSEUM 5235. H1046 THE D.N. SHOCK ABSORBER Co., Proprietors J. JULIEN. } BELGIUM. E. DERIHON. } Evelyn House, 62, Oxford Street, London, W1. September 7th. 1925… | ||
| Scan113 | Letter to The D.N. Shock Absorber Co. arranging a meeting with Mr. Hickson. | ||
| View original record | 42046 Hs/Rm5/LG. 10th. Sept. 1925. The D.N.Shock Absorber Co., Evelyn House, 62, Oxford Street, London W.1. Dear Sirs, We thank you for your letter of the 8th.inst. which we regret not having answered… | ||
| Scan114 | Derihon hydraulic shock absorber as a better proposition than the Houdaille. | ||
| View original record | To R. from Hs. c.c. to CJ. BJ. c.c. to RG. R. c.c. to DA. BY. c.c. to Wor. [Handwritten: X4046] Hs4/LG11.9.25. HYDRAULIC SHOCK ABSORBERS. [Handwritten: X4046 (crossed out) X457] We have seen a sample… | ||
| Scan115 | Setup and testing of various shock dampers for the Phantom and 20 HP models. | ||
| View original record | To Hs. from DA. c. to CJ. BY. c. to EP. FN. +4046 DA3/M23.9.25. SHOCK DAMPERS. X.8520 X.4046 X.1152 X.235 Referring to your visit to WW. yesterday, as reported elsewhere the first move is to set up… | ||
| Scan116 | Bump test report comparing Derihon, Houdaille, and Berkshire shock absorbers. | ||
| View original record | To Hs/Rm. from Hs/RB. t4046 25.9.25. SHOCK ABSORBER - BUMP TEST. X1152 /8530 Derihon, Houdaille & Berkshire. Bump drum speed 120 - 130 r.p.m. 2" cams at 180°. Shock absorbers run for the following… | ||
| Scan117 | Comparative analysis of different shock absorbers, focusing on performance, oil leaks, and overheating issues. | ||
| View original record | contd :- -2- DERIHON. (1) Cooling water on n/s absorber 15 mins. run. Did not lose efficiency and oil leaks almost negligible. )2) No cooling. 15 mins. run - n/s absorber. Efficiency lost but not as… | ||