Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Ignition testing regarding the length of spark gaps. | ||
| View original record | X-1812 C. 25.1.09 X-1812 IGNITION RE LENGTH OF SPARK GAP. With sparks gaps of battery plugs set at 35 thousands the engine missed five slightly. With the magneto plug gaps set at 25 thousands it… | ||
| Scan002 | Alterations to the size and specifications of spark gap gauges. | ||
| View original record | R.R. 235A (10011) P 723. 23.11.10) E.P. 7957. X1812 C X423 23.12.10. Re Spark Gap Gauges. Mr. Barrington. 23.12.10. With reference to your sheet of November 14th last altering the size of the spark… | ||
| Scan003 | Test report for an Anchor Sparking Plug. | ||
| View original record | X923 X18120 Section. 402 1600 DESCRIPTION:- Anchor Sparking Plug. Date sheet from office. 2.11.11 Date received. - Date Works instruction. - Material received. - Reported T.D. office. Reported to… | ||
| Scan004 | Test results of Renault spark plugs compared to Pognon plugs. | ||
| View original record | R.R. 148. (20 H) (F. 23. 22.4.09) G. 6930. x926 June 30th.,1909 1600 Tests on Renault plugs, taken by Lowe 25/6/09. Tested on 3 Chassis on Dynamometer, running in all 80 miles on magneto. Power same… | ||
| Scan005 | Specifications for various feeler gauges. | ||
| View original record | ROLLS-ROYCE LIMITED, NIGHTINGALE ROAD, DERBY. TELEGRAMS: "ROYCAR," DERBY. TELEPHONES: 476 (FOUR LINES). S18126. Names and indicating letter. Initial of person addressed. A Mr. ADAMS By Mr. BAILEY Bn… | ||
| Scan006 | Oxidising trouble with ignition plugs, its causes, and potential solutions. | ||
| View original record | X.1812.b COPY To EP. from R. c. to By. c. to EH. - 10/7/16 c. to J. R1/W8716. July 8th, 1916. RE OXIDISING TROUBLE WITH IGNITION PLUGS. Regarding the trouble with the ignition plugs, you will remember… | ||
| Scan007 | Potential petrol distribution issues in certain cylinders and the effect of carburettor mixture settings. | ||
| View original record | -2- To EP. from R. July 8th, 1916. Another point we have noticed under this heading is that the trouble may only occur in certain cylinders, in which there is a bias in the distribution of the petrol… | ||
| Scan008 | The test of a special sparking plug in Eagle and Falcon aero engines. | ||
| View original record | X 1812a COPY. ----------------- 26th JUNE 1918. REPORT ON THE TEST OF SPECIAL SPARKING PLUG FIRST TEST. The Plug was placed in a Series 8 Eagle engine and run at 1850 Revs. per min. for 20 mins., no… | ||
| Scan009 | Departmental memo about sending 'EOLE' Co. sparking plugs to Derby for testing on aviation engines. | ||
| View original record | X1812-a. AUTOMOBILES ROLLS-ROYCE (FRANCE) LIMITED 83, BOULEVARD GOUVION-SAINT-CYR PARIS TELEGRAMS: ROLLSROYCE-PARIS SHOWROOM, 102 Avenue des Champs-Elysees Teleph. : Wag. 87-04 OFFICES; GARAGE : / 83,… | ||
| Scan010 | Departmental memo requesting a report on sparking plugs tested on aero and car engines. | ||
| View original record | X1812-6 AUTOMOBILES ROLLS-ROYCE (FRANCE) LIMITED 83, BOULEVARD GOUVION-SAINT-CYR PARIS TELEGRAMS: ROLLSROYCE-PARIS SHOWROOM: 102 Avenue des Champs-Elysées, Téléph.: Wag. 87-04 OFFICES: GARAGE: STORES… | ||
| Scan011 | The low stock of motorcar sparking plugs and a request for advice on which type to order. | ||
| View original record | R.R. 235 Mr. Hives. 2244. EP. 30.1.18. x 8812 b. Wd/EM9/E30119. 0-0 We have received instructions from Mr. Chatwin that the stock of Motorcar Sparking Plugs is getting very low. We should be pleased… | ||
| Scan012 | Letter from Gregg Brothers offering to sell 1,000 French-made 24 m/m thread plugs suitable for earlier cars. | ||
| View original record | COPY X187R &. FROM:- Messrs Gregg Brothers, 19, Clifford Road, LONDON. N.2. Feb. 1st.1919. Ref. A.G. TO:- Messrs Rolls-Royce Limited, Nightingale Road, DERBY. Dear Sirs, RE 24 m/m thread Plugs,… | ||
| Scan013 | Letter from Raynaud & Bourceret regarding the supply of 18 spark plugs for testing. | ||
| View original record | X1812-C. FOURNITURES GÉNÉRALES POUR L'AUTOMOBILE & L'AVIATION ÉTABLISSEMENTS RAYNAUD & BOURCERET Société Anonyme au Capital de 1.000.000 FRS MARQUE HR DÉPOSÉE COMMISSION EXPORTATION BOUGIE R&V… | ||
| Scan014 | Departmental memo requesting a trial of sparking plugs from Messrs. Raynaud & Bouveret. | ||
| View original record | X1812-b. AUTOMOBILES ROLLS-ROYCE (FRANCE) LIMITED 83, BOULEVARD GOUVION-SAINT-CYR PARIS TELEGRAMS: ROLLSROYCE-PARIS SHOWROOM, 102 Avenue des Champs-Elysées Teleph. : Wag. 87-04 OFFICES: GARAGE: STORES… | ||
| Scan015 | Stating that no tests have been carried out on plugs submitted by Alfred Watkins or Mr. Glen. | ||
| View original record | To Srn. From EH. X.1812 b. EH1/LG2.8.19. 2nd. Aug. 1919. With reference to attached, we have never carried out any tests on Plugs submitted by Alfred Watkins or Mr. Glen. EH. | ||
| Scan016 | Departmental memo requesting a test report on 'RèV' sparking plugs. | ||
| View original record | X1812 - b. AUTOMOBILES ROLLS-ROYCE (FRANCE) LIMITED 83, BOULEVARD GOUVION-SAINT-CYR PARIS DEPARTMENTAL MEMO TELEGRAMS : ROLLSROYCE-PARIS SHOWROOM, 102 Avenue des Champs-Elysées Téléph. : Wag. 87-04… | ||
| Scan017 | Letter from The Igna Engineering Company Limited regarding their mica sparking plugs. | ||
| View original record | ALL LETTERS TO BE ADDRESSED TO THE COMPANY, NOT TO INDIVIDUALS. WHOLESALE ONLY. TELEPHONE, DUDLEY 2196 TELEGRAMS, "IGNA, DUDLEY." "IGNA" SPARKING PLUGS PATENTEES AND MANUFACTURERS. THE IGNA… | ||
| Scan018 | Letter from The Igna Engineering Co. Ltd. describing their patent cleaner and ruby mica sparking plugs. | ||
| View original record | Messrs. Rolls-Royce Ltd., (Contd) any kinds and by means of the "IGNA" Patent Cleaner, of which we shall also be pleased to send you a sample, it is possible to clean the Plug in 5 seconds when it has… | ||
| Scan019 | Confirmation of a telegram from Royce regarding a slight engine misfire and potential fixes. | ||
| View original record | R.R. 25b & 30 (T) (S.F 674. 22-5-10) G. 2376. X 1812/A CONFIRMATION OF TELEGRAM. X.3129. X.3713. X.3714. X.1812. 24th October, 1919. ROYCAR DERBY. CLARK 1EX SLIGHT MISSING ON PICKING UP CURED BY… | ||
| Scan020 | Sales letter from The A.J. Alsdorf Corporation regarding their TUNGSTEN Spark Plugs. | ||
| View original record | X.1812 G. THE A. J. ALSDORF CORPORATION EXPORTERS - MERCHANTS - IMPORTERS PURCHASERS, FINANCIERS AND FORWARDERS OF AMERICAN GOODS TO BUYERS IN ALL PARTS OF THE WORLD [Logo] The A.J. Alsdorf… | ||
| Scan021 | Business letter detailing discounts and an introductory offer for TUNGSTEN Spark Plugs. | ||
| View original record | --2-- DISCOUNTS. The very best discounts that we can allow off the above retail prices are as follows: On orders of less than 10 gross of Plugs 50%. On orders of 10 gross or more an extra 10% off the… | ||
| Scan022 | Three-panel advertising leaflet in Spanish for Tungsten Spark Plugs. | ||
| View original record | Panel 1: TUNGSTEN SPARK PLUG ALWAYS ON THE JOB. TRADE MARK REGISTERED. La Bujía Para Encendido Tungsten. Va muy bien empacada en una caja metálica. NUNCA SE DESGASTA. La palabra Tungsten es una marca… | ||
| Scan023 | Advertising leaflet in Spanish for Tungsten spark plugs, featuring a detailed cutaway diagram. | ||
| View original record | Las bujías Tungsten colocan vuestro motor en el grado mayor de eficiencia y dan un servicio largo y fiel porque se fabrican de los mejores materiales que se pueden obtener, y porque todas las piezas… | ||
| Scan025 | Exploded view and component breakdown of a Tungsten spark plug in Spanish. | ||
| View original record | Terminal Tuerca Grande de Apriete Relleno de Asbesto Cobre Redondo Macizo Cobre contra el Casco Asbesto contra la Porcelana Relleno Inferior Anillo de Latón Arandela de Cierre de Muelle Relleno… | ||
| Scan026 | Confirmation of a telegram detailing troubleshooting steps to cure engine misfires. | ||
| View original record | X.1812 CONFIRMATION OF TELEGRAM. X.1812. X.3129. X.3713. X.3714. ROYCAR DERBY. CLARK CAN MISSFIRES BE CURED IF ALL THINGS ARE NORMAL BY EITHER ONE OF THE FOLLOWING ALTERATIONS FIRSTLY CHANGING… | ||
| Scan027 | Request to find a more satisfactory plug and to trial K.L.G. 7 and K.L.G. F.52 types. | ||
| View original record | Copy X.1812G. EH. c. to BN. E.F.C EP/T2/F30.10.19. Mr. Platford writes from London that the present type of plug is considered unsatisfactory, and that all possible should be done to obtain a more… | ||
| Scan028 | Significant issues and anxiety over the inspection, testing, and poor performance of various types of spark plugs. | ||
| View original record | Typed Text: To By. - from Sft. The question of inspection, acceptance and rejection of Sparking Plugs is giving me considerable anxiety. The Test Department and Repair Department have complained of… | ||
| Scan029 | Test report comparing spark plug performance at different magneto speeds. | ||
| View original record | COPY Abbreviations:- M.F. - Misfires at C.F. - Cease fires at S.C. - Short circuit in plug after this pressure. F. - Fails without pressure. Magneto Speed Magneto Speed 300 R.P.M. 3000 R.P.M. Plug… | ||
| Scan030 | Modifications to the battery ignition system and their effects on engine performance. | ||
| View original record | R.R. 235a (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/15. X.1812.B. To BN. from R. Copy to CJ. " " EH. " " EP. R4/G1.11.19. RE BATTERY IGNITION. X.3129. X.3713. X.3714. XE1812. On Friday we changed the… | ||
| Scan031 | Remedies for sooty spark plugs, including petrol quality and coil insulation. | ||
| View original record | R.R. 235a (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. Contd. -2- R4/G1.11.19. made above probably do considerably improve the sparking at the ignition plugs, and in case of defective coil or other… | ||
| Scan032 | Telegram confirmation regarding the failure of mica spark plugs compared to porcelain ones. | ||
| View original record | X.1812. b. CONFIRMATION OF TELEGRAM. X 3413 4th November, 1919. ROYCAR DERBY. BARRINGTON HIVES OUR EXPERIENCE INDICATES THAT MICA PLUGS ARE A FAILURE THROUGH LIABILITY TO SOOT UP AND NOT BURN… | ||
| Scan033 | Road test of chassis 1.EX focusing on battery ignition performance after alterations. | ||
| View original record | Copy to Hs from EN. copy. (7th.Nov. 1919) To R. from E. c. to CJ. c. to BN. c. to FN. X.1812/E. (crossed out) X 3129 RE CHASSIS 1.EX. E2/04.11.19. After the alterations to the battery ignition had… | ||
| Scan034 | Use of tungsten as a replacement for platinum in high and low tension contacts and for ignition plugs. | ||
| View original record | X.1812 b To EFC. from R. c. to CJ. c. to BN. X.1818. c. to WD. X.2894. c. to EH. X.3513. c. to C. X.3299. R6/G5.11.11.19. RE METAL FOR HIGH AND LOW TENSION CONTACTS. I am very pleased we know that… | ||
| Scan035 | Engine starting procedures, the use of a primer, and related issues such as sooting. | ||
| View original record | X.1812. l. To Hs. from Bn. Copy to CK. X.3082. X.1812.. X.1899. X.1449 Bn7/W10.11.19. Please see attached copy of note from PN, (PN11/WL6.11.19) and CJ's remarks. Will you please report on this point… | ||
| Scan036 | Potential cause of sooting spark plugs related to new self-starter procedures. | ||
| View original record | X.1812.b/ COPY. X.3082. X.1812. X.1899. PN11/WL6.11.19. CJ. A good deal is being written about the sooting up of plugs just now. I have not seen it suggested that a contributory cause may be our new… | ||
| Scan037 | Mr. Royce's emphasis on using the correct plugs for post-war cars and arranging for their supply and fitting. | ||
| View original record | X 1872 l. To-Ex.-from-CJ. To Wor. from CJ. to EP. from CJ. To PH. from CJ. To C.G. from CJ. To M. from CJ. CJ18/Z.11.11.19. Re. Plugs. Mr. Royce was here yesterday and laid great emphasis on the fact… | ||
| Scan038 | Departmental memo chasing a report on 30 'Bougies Eole' sparking plugs sent for testing on aeroplane engines. | ||
| View original record | AUTOMOBILES ROLLS-ROYCE (FRANCE) LIMITED 83, BOULEVARD GOUVION-SAINT-CYR PARIS TELEGRAMS : ROLLSROYCE-PARIS SHOWROOM, 102, Avenue des Champs-Elysées Téléph. Wag. 87-04 OFFICES: GARAGE: STORES and… | ||
| Scan039 | Investigating an ignition failure, concluding wider spark plug gaps are advantageous for battery ignition systems. | ||
| View original record | X.1812. Q. To HN. from R. Copy to CJ. " " HS. " " Ck. " " PN. " " EP. " " HM. R1/G30.12.19. X.3129. - RE BATTERY IGNITION. X.3445. X.1812. X.3763. X.3713. ----------------------------- On 1.EX it was… | ||
| Scan040 | Experiments to improve engine ignition by adjusting spark gaps and coil windings. | ||
| View original record | Contd. -2- R1/G30.12.19. it has been determined that doing this allows of a fairly considerable increase in the length of the spark gap on the battery ignition plugs, and if so, would enable us to get… | ||
| Scan041 | 10,000-mile test on 'Forward' spark plugs by the Forward Sparking Plug Company. | ||
| View original record | Bn. from BY. c. to Hs. c. to Wor. C.R. X.3780 COPY / 16.12.20 X.3780 BY1/P13.1.20. CHASSIS - IGNITION WIRING & PLUGS. Mr. Bellringer in his memo N/Br10/H12.1.20., refers to a 10,000 mile tyre and… | ||
| Scan042 | Order for one dozen 'Forward' type 'E' spark plugs. | ||
| View original record | To Ms. From Hs. [crossed out] CK. [text crossed out] e1812 Q. Hs4/LC14.1.20. Will you please order from the Forward Sparking Plug Company, Summer Row, Birmingham, 1 dozen plugs known as the "Forward"… | ||
| Scan043 | Brief report comparing the performance of Lodge C.9 plugs against K.L.G. plugs. | ||
| View original record | BN. from Hs. c. to Wd. C.K. x1812 C. Hs2/LG19.1.20. X 1812 RE SPARKING PLUGS. At the moment we know of nothing better than the Lodge C.9. plugs. The tests with the K.L.G. plugs have not been carried… | ||
| Scan044 | The receipt of parts for an experiment and two orders, including Marble Resistance Seatings, Ferodo material, and Forward Sparking Plugs. | ||
| View original record | X 3780 (crossed out) 81812 b. Mr. Clark. from O.O. Wd/Dn2/HP21120. Please note we have received from Mr. F. Garrett for experiment 3757, 2 Marble Resistance Seatings R.2955, stores sheet 172439 of the… | ||
| Scan045 | The unsuitability of 'Forward' sparking plugs due to construction and measurement issues. | ||
| View original record | X3780 -61812C To EP/T. from Hs. CR. Hs1/LG21.1.20. With reference to attached, we have obtained one dozen "Forward" sparking plugs similar to those Mr. Rapson used on his 10,000 miles test. We do not… | ||
| Scan046 | Inquiring about the experience with 'Forward' plugs for potential further experimentation. | ||
| View original record | X.3780 8/8/26 To Hs. from Bn. Copy to Ck. Bn10/W22.1.20. X.3780 Re "Forward" Plugs. With reference to BY1-P13-1-20 what is your experience with the "Forward" Plug, and do you think that they are worth… | ||
| Scan047 | The unsuitability of 'Forward' sparking plugs due to issues with measuring the spark gap and their construction. | ||
| View original record | R.R. 235.s. 200 T) (S.F. 673. 22-5-19. C. 2376. X 3786 818120 EP/T. from Hs. Hs1/LG21.1.20. With reference to attached, we have obtained one dozen "Forward" sparking plugs similar to those Mr. Rapson… | ||
| Scan048 | Cover note for an attached document concerning 'Forward' plugs. | ||
| View original record | R.R. 235 s 200 T. (S F. 673. 22-6-19 G. 2376. To WH Hs. C. to CK. C. to DI. * X 3780 6/8/20. Hs5/LG22.1.20. X 3780 RE "FORWARD" PLUGS. With reference to your En10/W22.1.20. we attach herewith copy of… | ||
| Scan049 | List of electrical parts sent from the United States with status updates on their receipt and customs clearance. | ||
| View original record | X.1812 C. [strikethrough]X5092L[/strikethrough] ELECTRICAL PARTS SENT FROM THE STATES. 30.1.20. X.1198. One Willard Battery - latest type with threaded vulcanite separators. Recd. from U.S.A.… | ||
| Scan050 | Sales letter from Ripaults Manufacturing Engineers promoting their Oleo Plugs and offering samples for testing. | ||
| View original record | CONTRACTORS TO ADMIRALTY WAR OFFICE & AIR MINISTRY. Handwritten notes: X1872 b. L H.S. BV Telephone: WORKS NORTH 1227 (2 LINES) Cable & Telegrams: RIPAULT, CAMROAD, LONDON. SOLE LICENSEES FOR OLEO… | ||
| Scan051 | Sample spark plug received from the Gilardoni Sparking Plug Company for testing. | ||
| View original record | X18192 G. Hs. from BY. BY7-P20.2.20. CHASSIS - IGNITION WIRING AND PLUGS. The O.O. have handed me a sample plug as received from the Gilardoni Sparking Plug Company, who have sent the same on to us… | ||
| Scan052 | Letter from The British Aris Sparking Plug Co. Ltd. about their range of spark plugs and connectors. | ||
| View original record | PLUGS SUPPLIED TO BRITISH AND ALLIED GOVERNMENTS. PATENTED ALL OVER THE WORLD Telegrams: CLIMAX, CARDIFF Telephone: CARDIFF 306 THE BRITISH ARIS SPARKING PLUG CO. LTD. CARDIFF AND LONDON. London… | ||
| Scan053 | Advertisement for a 'High Tension Connector' from The British Aris Sparking Plug Company, Ltd. | ||
| View original record | THE BRITISH ARIS SPARKING PLUG COMPANY, LTD HIGH TENSION CONNECTOR SAFE NEAT Patented all over the World. REGISTERED OFFICE— 65/68, Merchant's Exchange, CARDIFF LONDON OFFICE— 5, Copthall Court,… | ||
| Scan054 | Advertisement leaflet for the ARIS High Tension Connector. | ||
| View original record | The BRITISH ARIS Sparking Plug Company, Ltd. HIGH TENSION CONNECTOR ARIS THIS CONNECTOR is a novelty that all Motor Car and Motor Cycle Owners and Drivers should appreciate as it presents the… | ||
| Scan055 | Advertisement for Aris Sparking Plugs, detailing different models and their construction. | ||
| View original record | SUPPLIED TO BRITISH AND ALLIED GOVERNMENTS. MOTOR CAR TYPES. MOTOR CYCLE TYPE. AVIATION TYPE. ARIS ALL ELECTRODES ARE OF PURE NICKEL. TYPE V.1 BRASS. TYPE V.2 BRASS. TYPE V.3 BRASS NICKELED. TYPE… | ||
| Scan056 | Advertising leaflet for the 'ARIS' Sparking Plug, detailing its features and benefits. | ||
| View original record | “ARIS” SPARKING PLUG. REGISTERED & PATENTED ALL OVER THE WORLD. The Longest Life. The Highest Efficiency. DESCRIPTION— THE “ARIS” Sparking Plug is mechanically constructed throughout and has no… | ||
| Scan057 | Advertisement for a High Tension Connector from The British Aris Sparking Plug Company. | ||
| View original record | THE BRITISH ARIS SPARKING PLUG COMPANY, LTD HIGH TENSION CONNECTOR SAFE NEAT Patented all over the World. REGISTERED OFFICE- 65/68, Merchant's Exchange, CARDIFF LONDON OFFICE- 5, Copthall Court,… | ||
| Scan058 | Product information sheet for a high tension sparking plug connector. | ||
| View original record | The BRITISH ARIS Sparking Plug Company, Ltd. HIGH TENSION CONNECTOR ARIS THIS CONNECTOR is a novelty that all Motor Car and Motor Cycle Owners and Drivers should appreciate as it presents the… | ||
| Scan059 | Advertisement and description for the 'ARIS' Sparking Plug. | ||
| View original record | TELEPHONE, CARDIFF, 306. TELEGRAMS: "CLIMAX, CARDIFF." "ARIS" SPARKING PLUG. REGISTERED & PATENTED ALL OVER THE WORLD. The Longest Life. The Highest Efficiency. DESCRIPTION— THE “ARIS” Sparking Plug… | ||
| Scan060 | Advertisement for ARIS sparking plugs, showing various models and a detailed cross-section. | ||
| View original record | SUPPLIED TO BRITISH AND ALLIED GOVERNMENTS. ARIS MOTOR CAR TYPES. MOTOR CYCLE TYPE. AVIATION TYPE. TYPE V. I BRASS. TYPE V. 2 BRASS. TYPE V. 3 BRASS NICKELED. TYPE MOTOR CYCLE STEEL. TYPE AVIATION.… | ||
| Scan061 | Letter from The British Aris Sparking Plug Co. Ltd. promoting their spark plugs and high-tension wire connectors. | ||
| View original record | X.1812a. CK THE BRITISH ARIS SPARKING PLUG CO+LTD., (CARDIFF AND LONDON,) 65/68 Merchants Exchange, Cardiff. HJE/L. March 8th. 1920. Messrs. The Rolls-Royce Co.Ltd., 15 Conduit Street, London W.1.… | ||
| Scan062 | Letter from a supplier offering to send samples of Motor Car Plugs. | ||
| View original record | X1812/b. BRITISH CENTRAL ELECTRICAL CO., LTD 6 & 8, ROSEBERY AVENUE, LONDON, E.C.1. MANUFACTURING ENGINEERS. SUPPLIERS OF EVERYTHING ELECTRICAL BANKERS LLOYDS BNK LTD LONDON. CODE A.B.C. 5TH EDN… | ||
| Scan063 | Letter concerning an enquiry for motor car plugs from the Federal Company of the States. | ||
| View original record | BRITISH CENTRAL ELECTRICAL CO., LTD. 6 & 8, ROSEBERY AVENUE, LONDON, E.C.I. BANKERS LLOYDS BNK LTD LONDON. CODE A.B.C. 5TH EDN TELEGRAMS BRITICENT HOLB.LONDON TELEPHONE HOLBORN 5848-5850.… | ||
| Scan064 | Letter from The Forward Sparking Plug Co. regarding the supply and testing of 'E' type spark plugs. | ||
| View original record | TELEPHONE Nọ - 6259. CENTRAL. x5780 818/26 The FORWARD SPARKING PLUG Co. Sole Manufacturers of the FORWARD PLUGS RC/MF. Your Ref. Order CP.390. Purchasing Dept. PROPRIETORS F.A.JOHNSON. F.A.L.JOHNSON.… | ||
| Scan065 | Letter regarding the dispatch and comparative performance of various spark plug brands, including Herz, A.C., and Champion. | ||
| View original record | R.R. 199 (250T) (SD676 19-7-17) MP180865 X.1812B COPY. May 22nd. EFC OY3/G22.5.20. To: Mr. F.H. Royce. c. to Mr. Hives. c. to Mr. Elliott. c. to Mr. Nadin. c. to Mr. Caswell. FROM Mr. Olley X.4196… | ||
| Scan066 | To F.H. Royce discussing different types of spark plugs and their performance. | ||
| View original record | OY3/G22.5.20. May 22nd.1920. To Mr. F.H. Royce - 2 I brought over samples of both of these types, which I believe you probably have at Chichester. There is no claim to any special design in these… | ||
| Scan067 | Development of new spark plugs by the Flint Company and the American Bosch Co. | ||
| View original record | OY3/G22.5.20. May 22nd. 1920. To - Mr. F.H. Royce - 2. (a) That the Flint Company is making us special plugs to suit our requirements with reference to drawings of the engine particulars of the… | ||
| Scan068 | The testing of 'Vallier' Spark Plugs from Messrs. Parker & French. | ||
| View original record | RR 235 B (50 T) (S.G. 504 8-1-20) G 2585. X.1812-b. To Hs. from Bn. Bn4/W25. 6. 20. c. to EFC. X.1812 Re "Vallier" Sparking Plug I send you herewith letter from Messrs. Parker & French relating to a… | ||
| Scan069 | Suitability of a sample American-made, single-point plug for the chassis. | ||
| View original record | x1812b. BY12/H. 28. 6. 20. Hs. CHASSIS IGNITION WIRING & PLUGS. I am sending you herewith a sample plug submitted to us by G.R.Thomas, of 26, Victoria Street, London, S. W. 1. also copy of his letter… | ||
| Scan070 | Letter from an agent offering 'Express Spark Plugs' for trial and sale for use in aviation engines. | ||
| View original record | Telegraphic Address: "Cariboo, Vic, London." Cable Address: "Cariboo, London." Codes: A B C 5th Edition. Western Union. Telephone: Victoria 4651. G. R. THOMAS. IMPORT. EXPORT. 26, VICTORIA STREET,… | ||
| Scan071 | Bureau of Standards report on an endurance test conducted on Duffy 'Air-Line' spark plugs. | ||
| View original record | (COPY) THE BUREAU OF STANDARDS ------------- REPORT ON ENDURANCE TEST ON THE DUFFY "AIR-LINE" SPARK PLUGS. -- Manufactured by The Express Spark Plug Co. - Washington, D.C. Five Duffy "Air-Line" spark… | ||
| Scan072 | Advertisement for Express spark-plugs, highlighting their performance in oily motors. | ||
| View original record | EXPRESS SPARK-PLUGS EXPRESS THE HEART OF THE MOTOR PERFORM IN OILY MOTORS | ||
| Scan073 | Allocation of work on magnetos, ignition, and sparking plugs. | ||
| View original record | To R. from EFC. c. to CJ c.to Wor c. to En. X1812 EFC9/T24.7.20. 2 X.430. Magnetos. X.699. Ignition. X.1812. SparkingPlugs. We are not really in a position to carry out any serious work on the above… | ||
| Scan074 | Letter regarding the sending of six Bougie Gilardoni Sparking Plugs for testing. | ||
| View original record | S/W. (Hs). X.1812 b. Hn6/CM27.7.20. X.1812 At the request of Mr. Spinney we are sending you herewith six Bougie Gilardoni Sparking Plugs, together with a letter from Messrs. Maclean Turnbull & Co.,… | ||
| Scan075 | Letter arranging for six Gilardoni sparking plugs to be sent for testing. | ||
| View original record | TELEPHONE, 4249 VICTORIA. TELEGRAMS, "DREDGEABLE, SOWEST" LONDON. MACLEAN, TURNBULL & CO., (G. M. TURNBULL) ENGINEERS & CONTRACTORS Inspection of Machinery Engines and Boilers for Shipment Abroad.… | ||
| Scan076 | Forwarding of A.C. 'Titan' single-point sparking plugs for testing. | ||
| View original record | X1812 C. BY5/H. 29. 7. 20. Hs. SPARKING PLUGS. "Titan" X1812 We are forwarding you herewith one dozen A.C."Titan" Sparking Plugs of the single-point type, which have been supplied to us by Messrs… | ||
| Scan077 | Authorising an order for 5000 sparking plugs and agreeing to increase the minimum order number. | ||
| View original record | X1812 BY/Mtn5/H. 10. 8. 20. Me. c. Hs X1812 b. SPARKING PLUGS. --------------- Referring to your memo Wd/Ms10/FJ. 7. 8. 20. will you please place a further order for 5000 plugs. Referring to the… | ||
| Scan078 | Suitability of Lodge mica ignition plugs compared to porcelain and K.L.G. types. | ||
| View original record | To Hs. from R. Copy to CJ. " " Bn. " " Da. " " By. " " EFC. " " EP. " " Oy. X 1812 l R5/G10.9.20. X.1812. RE IGNITION PLUG. X.1918. X.3413. X.2635. On looking over the spares in 6.EX and 1.EX I find… | ||
| Scan079 | Cleanability and design of various spark plugs. | ||
| View original record | Contd. -2- R5/G10.9.20. If you examine these plugs you will find that they are extremely difficult to clean, and one does not know when they are clean. This is a very different matter with the… | ||
| Scan080 | Inspection of the 1.EX engine, detailing issues with ignition and valve clearance at low speeds. | ||
| View original record | Contd. -3- R5/G10.9.20. of very slight deposits of soot spoiling the ignition, and especially affecting it at slow speeds. A.3763. I have just been over 1.EX engine and find that it appears in… | ||
| Scan081 | Method for cleaning sooted Lodge sparking plugs. | ||
| View original record | R.R. 226a (100 T) S.H. 89. 22-7-20 G. 2769 X1812 l To EP from Hs. c. to Hm. Hs2/LG10.9.20. X.1812. X.3413. SPARKING PLUGS. T We find that the most successful way of cleaning Lodge sparking plugs which… | ||
| Scan082 | Minute from a conference in Derby regarding the decision to use two sources of supply for batteries and sparking plugs. | ||
| View original record | X.1812 l. 3 MINUTE PASSED AT MIDLAND HOTEL CONFERENCE, DERBY, ON SEPTEMBER 16TH 1920. 2 YC. AGREED - X.664 X607 X.979 Batteries and Sparking Plugs. X 1812 That in the case of units which are only… | ||
| Scan083 | Ongoing testing and evaluation of ignition plugs, specifically the Lodge C.9, and the strategy for sourcing them. | ||
| View original record | X1812 b. To R. from Hs. c. to CJ. c. to Bn. c. to E. c. to Da. c. to By. c. to EWT. for R.R. Inc. Hs7/LG4.10.20. X.1812. X.3413. IGNITION PLUGS. We are constantly testing different makes of plugs in… | ||
| Scan084 | Use and comparison of American Champion and Lodge spark plugs. | ||
| View original record | R.R. 100 [40M?] (SD6/6 19-7-07) MP 180805 To R. from Hs. -2- Hs7/LG4.10.20. Contd. we can despatch cars - some with one make and some with another; the same with the battery. We think this will help… | ||
| Scan085 | Ripaults Oleo Plugs being used in the winning machine of the Gordon-Bennett Cup race. | ||
| View original record | Hs. from Wd. c. to EFC. c. to By. c. to Ms. X.1812 l. Wd4/NJ11.10.20. Ripaults, 1 King's Road, St Pancras, London, N.W.1 These people have written advising us that Ripaults Oleo Plugs were fitted to… | ||
| Scan086 | Points for attention following an American visit, concerning rear springs, steering pivots, and ignition issues. | ||
| View original record | X1812 b Wor. from EP. c. By. c. Wd. c. Hs. c. CJ. EP6/F11.11.20. 11th Nov. 1920. X.3614. RE AMERICAN VISIT - POINTS FOR ATTENTION. (1) REAR SPRING. X.2628. X.3461. X.3900. It has now been agreed by R… | ||
| Scan087 | Unsatisfactory spark plugs and magneto failures, suggesting alternative parts and design changes. | ||
| View original record | Contd. -2- EP6/F11.11.20. Contd. We must certainly look upon the fact that the present plugs are not satisfactory, and a plug which is capable of running in well lubricated cylinder without failing,… | ||
| Scan088 | Chassis 39-TW, discussing improvements to ignition plugs and condensers. | ||
| View original record | x1812 b. W/S. EP13/F12.11.20. c. to HR. c. to BJ. c. to Prs. c. to HS. X.4054 X.1812. RE CHASSIS 39-TW. GEOFFREY SUMMERS ESQ. X.2635. With reference Prs' report 1963 ref. PRSl/EP/91120 the information… | ||
| Scan089 | Results of further tests for leaky sparking plugs. | ||
| View original record | X1812-b Mr. Hives. 22.11.20 X.3641 X1812 SPARKING PLUGS. Further tests for leaky plugs:- 6 Titan plugs all O.K. 4 Cooke plugs " " 2 B.G. detachable" " GWH. | ||
| Scan090 | Various points following a visit to America, covering ignition, magnetos, and other vehicle components. | ||
| View original record | To Wor. from Hs. X1812b EP'S VISIT TO AMERICA. X.3614. With reference to Mr. Platford's memo, Re Visit to America. The following are my points on this matter which may be of interest to you :- Item 1.… | ||
| Scan091 | Article from 'The Motor' magazine about the construction of modern sparking plugs using mica. | ||
| View original record | X.18/12-br. December 29, 1920. 1117 The Motor THE MARVELS OF MICA. Some Sidelights on the Construction of the Modern Sparking Plug TAKE a piece of flimsy paper and try to split it into two single… | ||
| Scan092 | Article from 'The Motor' magazine describing the manufacturing process and testing of mica spark plugs, specifically the detachable 'G' type K.L.G. plug. | ||
| View original record | The Motor 1115 December 29, 1920. THE MARVELS OF MICA.—Contd. indicated by a small pipe which runs from the press into a little bath of methylated spirits, the leak, of course, being indicated by a… | ||
| Scan093 | Instruction note comparing the performance of different spark plug brands. | ||
| View original record | ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: Col Harker Date: Jan 3rd 1921 re Plugs. Cooke's plugs only run 1500 miles & then gave trouble with internal shorts. Campion plugs run very well & give no trouble… | ||
| Scan094 | Requesting information on the position of plugs in an engine, whether pocket or central. | ||
| View original record | E.F.C x F/E/2a HTr. from Hs/TMW. Hs/TMW2/LG4.1.21. RECEIVED X 18/2 RE. PLUGS. With reference to Mr. H. Clarke's note in regard to Plugs, could he give us information as to the position the plugs… | ||
| Scan095 | Test report comparing the performance of various spark plugs under different conditions. | ||
| View original record | 96EC X1812a File E 17.1.21. RECEIVED JAN 17 1921 Plugs fitted to 9.EX for 1st. and 2nd. Test. CA for 3rd. Test Date. | Type. | 1st. Test over-strong mixture. | 2nd. Test breaking down insulation. |… | ||
| Scan096 | Test log for various spark plugs, detailing results of mixture, insulation, oiling, and pre-ignition tests. | ||
| View original record | Header Row: -2- Date. Type 1st. Test. Over-strong mixture. 2nd. Test. Breaking down insulation. 3rd. Test. Over-Oiling. 4th. Test. Pre-ignition. Test Bed. No. fitt: No. failed Remarks. Row 1: Date:… | ||
| Scan097 | Returning Heath spark plugs after testing revealed them to be the worst performing. | ||
| View original record | To EP+ from hs/TMW. W. X.1812a. Hs/TMW1/LG13.1.21. RE. HEATH SPARK PLUGS. You will remember you sent 6 of the above plugs for us to test and report. We have put them in an engine and tested them in… | ||
| Scan098 | Proposed new sparking plug and its claimed advantages. | ||
| View original record | To Mr Warwick from DA. X 7814 -o- DA14/CB21-1-21. Attached are particulars of a proposed new sparking plug which has been submitted to us. We do not know whether you are sufficiently interested in… | ||
| Scan099 | Unsatisfactory testing results of Heath spark plugs in cars and aero engines. | ||
| View original record | X1812a. Hs AT *FEB 3 1921 H'd. From EP [crossed out] c. to Hs. EP3/R1.2.21. RE. HEATH PLUGS. RECEIVED With reference to your WD6/NJ26.1.21, you can assure Heath Plugs Ltd. that we have not condemned… | ||
| Scan100 | The procedures for testing various makes of sparking plugs. | ||
| View original record | To R. from Hs. c. to CE. c. to Co. c. to En. c. to E. c. to Da. c. to EY. c. to EP. c. to EWT. for R.R. Inc. X.1812 b Hs5/LG9. 2. 21. X.4295 X.3900 X.4196 X.4277 X.1812 TESTS ON SPARKING PLUGS. Below… | ||
| Scan101 | Test report on various types of spark plugs. | ||
| View original record | -2- H85/LG9.2.21. (Faint vertical text on right margin: R.R. Ltd. H.S.B. No. 165/G 194?) Type of plug. No. tested. Test 1. Test 2. Test 3. Test 4. Test 5. Remarks. Bethelem U.S.A. 12 O.K. O.K. O.K. 4… | ||
| Scan102 | Results of tests on various spark plugs, providing a ranking and a recommendation for purchase. | ||
| View original record | Contd. -3- Hs5/LG9.2.21. From the results of these tests we place the - Mercury plug the first Champion U.S.A. plug the second and the Bethelem U.S.A. plug the third. All of these plugs have pot type… | ||
| Scan103 | Forwarding a letter from Heath Plugs Ltd. and discussing associated test reports. | ||
| View original record | Hs. c. to Wd. X18/2 Jr. Mis EP8/F11.2.21. RE. HEATH PLUGS. We attach copy of letter we have received from Heath Plugs Ltd., which has been forwarded on to us by Wd. We are anxious to bring to your… | ||
| Scan104 | Letter and test reports for Heath Plugs. | ||
| View original record | Hs. [text crossed out] Wd. EP8/F11.2.21. X.1812 C- Hs FEB 11 1921 F.R. REC'D RE. HEATH PLUGS. We attach copy of letter we have received from Heath Plugs Ltd., which hasbeen forwarded on to us by Wd.… | ||
| Scan105 | Letter from Heath Plugs, Limited, defending their spark plug design against claims of sooting and oiling up. | ||
| View original record | COPY OF A LETTER RECEIVED FROM:- HEATH PLUGS, LIMITED, (Works) SANCROFT STREET, PLEASE REPLY TO WORKS. KENNINGTON CROSS, LONDON, S.E.11. February 9th. 1921. Refs. Your (Wd2/NJ5221 Ours (AEH/W/3… | ||
| Scan106 | Page 2 of a letter from Heath Plugs Ltd. regarding the superiority of their sparking plugs. | ||
| View original record | -2- feel confident you would soon be convinced of its superiority over all other "common-or-garden" open ended sparking plugs, but he regrets at the moment it is impossible for him to get away. We… | ||
| Scan107 | Inclusion of a slow running test for sparking plugs and its long-term reliability. | ||
| View original record | R.H. 235a (100 I) (S.H. 798. 10-12-20) G. 2045 Hs. from EP. C. to E. (Struck through) C. to Da. (Struck through) x18/2 lv. EP17/F12.2.21. [STAMP] Afs R FR RECEIVED FEB 4 1921 TESTS OF SPARKING PLUGS.… | ||
| Scan108 | Comparing different types of sparking plugs. | ||
| View original record | c. to CJ. c. to Wor. c. to EP. c. to HM. c. to R.R. of Amer. Inc. (For the attention of CY). X.1812 C. X.1812 - RE SPARKING PLUGS. X.4196. X.3413. X.4277. X.3905. X.4295. The Mercury plug from its… | ||
| Scan109 | Conclusion to standardise Champion (Canadian make) and Mercury (Birmingham make) components for cars. | ||
| View original record | Contd. -2- R1/G16.2.21. satisfactory. In conclusion, I agree (subject to further exhaustive tests confirming) to prepare for at once standardising the Champion (Canadian make) for U.S.A. and the… | ||
| Scan110 | Requesting an update on the action taken with reference to a sparking plug. | ||
| View original record | X1872 a. To Mr Warwick from DA. DA6/CB21-2-21. Referring to our DA14/CB21-2-21 would you please tell us whether any action was taken with reference to this sparking plug, so that I may write and tell… | ||
| Scan111 | Performance and recommendation of various sparking plug brands such as Champion, Mercury, and Lodge. | ||
| View original record | X.1812 C. To BY. from R. c. to CJ. c. to Hs. c. to EP. c. to Hm. c. to Pn. c. to H. c. to R.R. of America Inc. (for the attention of OY) X.1812 RE SPARKING PLUGS X.4295 X.4196 X.4313 X.2535 With… | ||
| Scan112 | Proposal for a cost-saving plug repair and exchange system for Mercury plugs. | ||
| View original record | Contd. -2- Rs/G22.2.21. There is no reason why someone, say a stores hand, should not be taught to repair plugs in his spare time, if we found the Mercury a satisfactory proposition. Hence the cost of… | ||
| Scan113 | Extract from a letter from C.A. Vandervell & Co. Ltd. announcing new C.A.V. sparking plugs. | ||
| View original record | X.1812.b Extract from letter of C.A.Vandervell & Co. Ltd., Acton, London, W.3. 1st. March, 1921. ref. AG/LRP. Dear Sirs, We have pleasure in bringing to your notice two new C.A.V. specialities, and… | ||
| Scan114 | Letter from Barracloughs (Engineers) Ltd offering a sample of their improved 'Bradford' Patent spark plug for testing. | ||
| View original record | TELEPHONES: WORKS & GARAGE: THORNTON 147. RESIDENCE: THORNTON 12Y. TELEGRAMS: BARRACLOUGH. 147. THORNTON. BRADFORD BARRACLOUGHS (ENGINEERS) LTD MANUFACTURERS OF THE BRADFORD PATENT SPARK PLUGS JOHN… | ||
| Scan115 | Returning correspondence regarding sparking plugs from General Instrument and Engineering Co. Ltd. | ||
| View original record | X/812 b. S. S. & A (100 T) (S. H. 79S. 10-12-20) G. 1947 To Da. from Hs. Hs6/LG7.3.21. Sparking Plugs We return herewith correspondence from the General Instrument and Engineering Co.Ltd., Adam… | ||
| Scan116 | Suspected pre-ignition issues with 'Mercury' plugs due to their porcelain design. | ||
| View original record | X1812 C. To HS. from R. Copy to CJ. D R4/CE/8/21. RECEIVED 9 MAR 1921 HS X4295 RE "MERCURY" PLUGS. I have a suspicion that one of these on the small pump engine here was causing pre-ignitions after… | ||
| Scan117 | Letter from Garage 'Service' Equipment Ltd. offering a set of 'Molla Plugs' for trial. | ||
| View original record | X.18120 GARAGE "SERVICE" EQUIPMENT LIMITED TELEPHONES: MAYFAIR 6769 & 6770. TELEGRAMS: "GARSERLIT, WESDO, LONDON." MEMBERS OF LONDON CHAMBER OF COMMERCE MOTOR SERVICE SOCIETY. New York Office: ALLIED… | ||
| Scan118 | Price list for spare parts from The British Molla Plug Co. | ||
| View original record | THE BRITISH MOLLA PLUG Cº Handwritten: 111/113 Gt Portland St. W.1 Struck-out: 2, PRINCES STREET Struck-out: HANOVER SQUARE LONDON W. I. Nº 6 PRICE OF SPARE PARTS MOLLA | ||
| Scan119 | Exploded view diagram and spare parts price list for the Molla Plug. | ||
| View original record | Do not throw away any old parts of your Molla Plug they are always useful to make up another plug with, as they are all the same size and standard in make. IMAGE CONTENT: Left side shows an exploded… | ||
| Scan120 | Instructional leaflet for the Molla Sparking plug No. 6, detailing its disassembly and regulation. | ||
| View original record | 111/113 Gt Portland St GARAGE "SERVICE" EQUIPMENT LTD., 9, Princes Street, Hanover Sq., London.W.1. The MOLLA SPARKING plug. No 6 PATENTED IN ALL COUNTRIES THE ONLY SPARKING PLUG IN THE WORLD WHICH IS… | ||
| Scan121 | Advertising leaflet comparing the cost and features of the 'Molla Plug' against a generic alternative. | ||
| View original record | Fig. 6 Tighten up carefully the top nut and in order to avoid any stiffing of the spark gap adjustment, it is wise to keep one finger of the left hand pressed on the end of the electrode thus keeping… | ||
| Scan122 | Advertisement for the 'Over All' or 'O.A.P.' two-piece detachable sparking plug. | ||
| View original record | Get the best type of spark plug for your car - Ask your dealer to supply you with the “Over All,, Sparking Plug THE O.A.P. PLUG The one which gives security for high power and high compression motors.… | ||
| Scan123 | Requesting a halt to sending spark plugs for testing, with a specific request for a 'Molla' plug for inspection. | ||
| View original record | X804 X.1812 e- W/S Cx. from hs. Hs2/LG16.3.21. X1812 RE SPARKING PLUGS. Please do not send us any more sparking plugs to test. We receive on the average about three or four different types of plugs… | ||
| Scan124 | Arranging for a Molia plug to be sent from Garage 'Service' Equipment Ltd. | ||
| View original record | R.R. 950s. (20 T) (S.H. 326. 31-1-21). Bm. 2/6/15. X.1812 b. Cx6/WM18.3.21 S/W. Hs. I have asked the Garage "Service" Equipment Ltd. of Great Portland Street, to send you one Molia plug, as… | ||
| Scan125 | On testing ignition plugs, noting the failure of a Champion plug and suggesting modifications for Mercury plugs. | ||
| View original record | To HS. from R. Copy to CE. " EFC. X 1872 ORIGINAL R6/G12/4/21. (54) X 1812 RE IGNITION PLUGS. X 4196 X 4295 X 2635 The Champion plug you gave me to test in the little pump engine here soon broke its… | ||
| Scan126 | Performance issues of Watford magnetos and Lodge spark plugs, referencing a report by PN. | ||
| View original record | To EFC. from R. c. to CJ. c. to Hs. c. to EP. c. to HM. Handwritten: X1812 b. E.430. MAGNETOS. X.2375. X.1812. X.4181. X.4279. In PN's report (PN3/DN19.4.21) concerning Mr. Houderm, it will be noticed… | ||
| Scan127 | Sales letter from Universal Engineering Co. promoting Igna Sparking Plugs. | ||
| View original record | X18129. ALL LETTERS TO BE ADDRESSED TO THE UNIVERSAL ENGINEERING CO. Telephone: CENTRAL 2108 BIRMINGHAM Telegrams: MINDFUL, BIRMINGHAM IGNA Sparking Plugs PAT 138008/18 BRITISH MADE ALWAYS FIRING THE… | ||
| Scan128 | Advertisement for IGNA sparking plugs, detailing various models and prices. | ||
| View original record | IGNA Sparking Plugs "ALWAYS FIRING." Each IGNA model here shown is the outcome of a wide experience in plug design and represents the highest type of modern plug production. REDUCED IN PRICE BUT NOT… | ||
| Scan129 | Recommendations on magneto requirements for the 40/50 engine, comparing different magneto and spark plug types. | ||
| View original record | X1812 C. Extract from Hsl/LG5.5.21. X.430. MAGNETO REQUIREMENTS FOR 40/50 ENGINE. Recommendations. X.1812. X.3775. X.4181. X.4279. X.3413. X.4295. X.4196. During our tests we have proved that the… | ||
| Scan130 | Tests carried out on ignition coils with varying secondary turns. | ||
| View original record | Hsl/LG5.5.21 -2- Contd. magneto, the less exacting are our plug requirements. During these tests we have carried out tests on the coils. We have tried coils with 14,000, 16,000 and 18,000 turns on the… | ||
| Scan131 | Magneto ignition requirements and spark gap issues for the 40/50 HP chassis. | ||
| View original record | X1812 b. To Hs. From R. c. to CJ. c. to EFC. c. to EP. c. to PN. c. to R.R. of America Inc. (For the attention of CY). X.430 - RE 40/50 H.P. CHASSIS - MAGNETOS. X.699. X.1812. With reference to your… | ||
| Scan132 | Report discussing engine firing irregularities, focusing on magneto performance, spark plugs, and carburation. | ||
| View original record | Contd. -2- R12/G10.5.21. Kindly advise me if I have read your report incorrectly. In conclusion, it seems that we require a magneto which will bear longer safety gap, and it is not a question of… | ||
| Scan133 | Magneto ignition requirements, discussing irregular firing and issues with spark plug positioning on 40/50 HP cars. | ||
| View original record | R from EP. c. Hs. c. EFC. X.1812.b. EP2C/F12..21. X.430. MAGNETO IGNITION REQUIREMENTS. X.1812. X.699. We are glad to note your comments in F12/G10.5.21 on Hs's report, which we are very pleased to… | ||
| Scan134 | Spark plug and magneto performance related to engine slow running, overheating, and oiling issues. | ||
| View original record | Contd -2- inclined to suffer from overheating of the points, but more inclined to oil and soot up. 5. It is certainly a fact that slow running on the intermediate position of plug can be obtained with… | ||
| Scan135 | Advertising leaflet for the Fisher Plug, detailing its features and principle of operation. | ||
| View original record | THE FISHER PLUG CONSIDER THESE POINTS! (1) Core detached in 5 seconds. (2) Cleaned thoroughly in a few moments. (3) Instantaneous removal of both sparking points. (4) Positive priming through plug… | ||
| Scan136 | Instructions for the removal and replacement of the Fisher Plug. | ||
| View original record | THE FISHER PLUG REMOVAL Fig 1. FIT spanner to lock nut and loosen gently, pulling upwards on plug terminal, as in Fig. 1. No force is required. No further instruction needed. THE FISHER PLUG… | ||
| Scan137 | Report condemning the 'Fisher' sparking plug due to design flaws, a doubtful patent, and high cost. | ||
| View original record | X1812-C. To C.J. from Hs. RE "FISHER" SPARKING PLUG. It is quite impossible to give a report on a single sample plug. We should however condemn the Fisher Plug from the design. If it was submitted in… | ||
| Scan138 | Instructing to halt the testing of the Fisher Sparking Plug. | ||
| View original record | R.R. 950a. (20 T) (S.H. 326. 31-1-21). Bm. 2/6/15. X1812-B. To Hs. from CJ. Fisher Sparking Plug. CJ10/E1/6/21 Referring to your Hs1/LG30/5/21, do not proceed with the testing of the Fisher Plug. CJ.… | ||
| Scan139 | The trial of experimental sparking plugs for chassis No. 79-TW. | ||
| View original record | S/W. Hr. (Handwritten Note) To H.S you will remember I wrote to you about these plugs & you said we had better take a set to try & keep customer in a good temper JH 13.6.21 (Header References)… | ||
| Scan140 | Requesting the return of a loaned Fisher Sparking Plug sample. | ||
| View original record | X1812 C. To Hs. from CJ. Fisher Sparking Plug. CJ5/E13/6/21 If the sample plug which was loaned to us has not been damaged, would you kindly return it to Mr.J.C.Keen Hargreaves at 43-44, New Bond… | ||
| Scan141 | The despatch of a sample Fisher Sparking Plug to a client. | ||
| View original record | X1812-b To BP. from Hs. c. to Mr. Chatwin (Stores) Hs1/LG15.6.21. FISHER SPARKING PLUG. We are sending into the Stores - 1 Fisher Sparking Plug (sample) Will you kindly give the Stores the necessary… | ||
| Scan142 | Advertisement for a dashboard-mounted Manifold Ignition Indicator & Plug Tester. | ||
| View original record | X1812-9 Raise the Standard of your Car by fitting this ingenious time saver. THE MANIFOLD IGNITION INDICATOR & PLUG TESTER A Dashboard Flush Type Fitting for Detecting Ignition Trouble. The first test… | ||
| Scan143 | Extract from a report discussing issues with spark plug positioning for cars destined for America. | ||
| View original record | X1812. le. Extract from EP/Tnn6/H6.7.21. X.3719. RE CARS FOR AMERICA. Item 10. Position of Sparking Plugs. The following is an extract of a report from Mr. Platford on this matter:- "Am having great… | ||
| Scan144 | Page 2 of a document concerning the position, type, and gap of plugs and compressions. | ||
| View original record | -2- settled re position, type and gap of plugs etc. compressions". EP/Thn. S463 G (50-51-0) 964 H'S(L.001) '48'H | ||
| Scan145 | Position of sparking plugs for cars intended for the American market. | ||
| View original record | X.1812. h Extract from Hs7/LG6.7.21. RE CARS FOR AMERICA. X.3719 Item 10. Position of sparking plugs. We do not see that we can do much good in carrying out further tests on the position of sparking… | ||
| Scan146 | Letter regarding the submission of 13 plugs for testing and a discussion of patent rights. | ||
| View original record | X1812 C. TELEPHONE. WIMBLEDON 134. MARTHOLME, PARKSIDE, WIMBLEDON, S.W. 19. 12th July, 1921. Messrs Rolls Royce, Ltd., (Experimental Department), Nightingale Road, DERBY. X1812 Dear Sirs, Referring to… | ||
| Scan147 | Requesting tests to be carried out on one dozen AC Plugs No.18 CPT from The A.C. Sparking Plug Co. Ltd. | ||
| View original record | X1812 Ca Hs. Wd/Ms3/FJ16.7.21. We attach hereto copy of letter we have received from The A.C.Sparking Plug Co.Ltd., dated 8th inst.together with one dozen AC Plugs No.18 CPT. Will you please carry out… | ||
| Scan148 | Letter from A.C. Sparking Plug Co. Ltd. regarding the supply of spark plugs No.18 CPT for testing. | ||
| View original record | Copy of letter received from:- A.C.SPARKING PLUG CO.LTD., 2, Thurloe Place, London, S.W.7. Ref.-RC/HB. July 8th,1921. FRIDAY. Messrs.Rolls-Royce Ltd., Nightingale Road, Derby. Dear Sirs, For the… | ||
| Scan149 | Letter from AC Sparking Plug Co. Ltd. promoting their spark plugs following success at the Le Mans Grand Prix. | ||
| View original record | Telephone: KENSINGTON 6518 Telegrams & Cables: ACSPARKO, SOUTHENS, LONDON. Codes: Western Union, Lieber's, Bentley's, Private. AC Sparking Plug Co.Ltd. 2, Thurloe Place, LONDON, S.W.7. Your Ref. Our… | ||
| Scan150 | French advertisement comparing the cost-effectiveness and features of the 'BOUGIE MOLLA' spark plug against a generic competitor. | ||
| View original record | X1812-b Fig. 6 Serrez doucement l'écrou supérieur. Afin d'éviter le déréglage il est bon d'appuyer un doigt de la main gauche sur le bout de l'électrode de façon à la maintenir dans son siège. Fig. 7… | ||
| Scan151 | Instruction leaflet for the demountable and adjustable Molla No. 6 spark plug. | ||
| View original record | BOUGIE MOLLA, N° 6 BREVETÉE DANS TOUS LES PAYS SEULE BOUGIE AU MONDE ENTIÈREMENT DÉMONTABLE & RÉGLABLE Fig. 1 Fig. 2 Dévissez l'attache fil et l'écrou supérieur. Fig. 3 Enlevez la calotte de… | ||
| Scan152 | From CJ to the Experimental Department regarding the testing of an enclosed 'Silca' plug from a customer. | ||
| View original record | X1812-b. To Experimental Dept. from CJ. CJ10/E4/8/21 Captain James E.Withers, of 46 Maresfield Gardens, Hampstead, N.W., who owns more than one of our cars, has asked us to inspect the enclosed… | ||
| Scan153 | Requesting advice on which make and quantity of sparking plugs to order as stock is at a minimum. | ||
| View original record | X1812 C. RECEIVED 15 AUG 1921 Hs. By. Wd/Ms2/FJ13.8.21. 40/50 H.P. Chassis. We are advised by the Stores that the stock of Sparking Plugs has now got down to the minimum i.e. 1100. Kindly advise me as… | ||
| Scan154 | Technical memorandum discussing pre-ignition issues caused by Champion ignition plugs. | ||
| View original record | X1812-C. To R.R. America Inc. from R. for the attention of OY. c. to CJ. c. to Hs. R16/G5. 9. 9. 21. X.4196 - RE IGNITION PLUGS. X.1812. X.4295 X.4305 In some of your descriptions you say that with… | ||
| Scan155 | Selection and performance of spark plugs in various engines. | ||
| View original record | Contd. -2- Hal6/G5.9.21. ---------- Personally, I have never experienced this on our car engine, but on aero engines and other cars and stationary engines we have known it to occur badly, and have had… | ||
| Scan156 | Follow-up on the trial of French-made sparking plugs offered by a customer for chassis 79-TW. | ||
| View original record | X1812 C. Bt9/TB/9.9.21. X2565 X1812 S/W. Re - George Roberts, Martholme, Parkside, Wimbledon! Chassis No. 79-TW. You may recall that Mr. Roberts, owner of chassis 79-TW, offered us a trial of a dozen… | ||
| Scan157 | Requesting an update on the testing of a 'Silca' plug. | ||
| View original record | X1812 l. To the Experimental Dept. from CJ. CJ/Py6/D9.9.21. On the 4th inst. I sent you a "Silca" plug which had been brought to me by a Captain James E. Withers. Will you please let me know to-morrow… | ||
| Scan158 | Cover of a document titled 'Spark Plug Logic', featuring an illustration of a spark plug. | ||
| View original record | X1812 C Spark Plug Logic | ||
| Scan159 | The stagnation in spark plug design and the problems with various insulating materials. | ||
| View original record | SPARKING Plug design has for many years been stagnant. The explanation of this is undoubtedly to be found in the limited properties of materials from which insulators have been produced; none has been… | ||
| Scan160 | Follow-up memo from CJ to the Experimental Dept. regarding the testing of a plug. | ||
| View original record | X1812-l To Experimental Dept. from CJ. CJ/Py21/D13.9.21. With reference to my CJ/Py6/D9.9.21, to which I have had no reply, I wish to let Capt. James Withers know as soon as possible whether we have… | ||
| Scan161 | Test report on a 'Silca' sparking plug. | ||
| View original record | CJ. from Hs. X1812 C. Hs2/LG14. 9. 21. REPORT ON "SILCA" SPARKING PLUG. The tests on this plug were carried out on a single sample plug sent to us by CJ. We have run this plug for 30 hours on a 40/50… | ||
| Scan162 | Testing of a spark plug and proposing design improvements. | ||
| View original record | contd:- -2- Hs2/LG14.9.21. explosion. We also think the way in which the whole plug can be taken apart and cleaned, is very good. We should be very pleased to test another one of these plugs which… | ||
| Scan163 | Letter from George Roberts following up on sparking plugs sent for testing and offering patent rights. | ||
| View original record | GEORGE ROBERTS, % PEEK, FREAN & CO. LTD., DRUMMOND ROAD, LONDON, S.E.16. TELEGRAMS: "PICKAXE, LONDON." TELEPHONE: 3570 HOP (EIGHT LINES) LONDON, S.E. 16th September, 1921. Messrs Rolls-Royce Limited.,… | ||
| Scan164 | Request to return a tested sparking plug to Captain Withers. | ||
| View original record | X1812 le. Cx7/WM/17.9.21 S/W. Hs. You have been testing a sparking plug for Captain Withers and have now submitted a report on it. Captain Withers asks you to kindly return to him the plug that has… | ||
| Scan165 | Arranging the return of a 'Silec' Plug to Captain Withers. | ||
| View original record | To Hs. from CJ. 81812E 'Silec' Plug. CJ2/E17/9/21 Referring to your Hs2/LG14/9/21, I attach herewith copy of letter received from Capt.Withers. Will you kindly return the plug direct to Captain… | ||
| Scan166 | Letter regarding the testing of a 'Silca' spark plug and a request for its return. | ||
| View original record | R H 285a (100 T) (S. H. 159 11-8-20) G. 2800 COPY. 49, Maresfield Gardens, Hampstead, N.W. Sept.16.21 Claude Johnson Esq. Dear Sir: Many thanks for having tested the 'Silca' plug and for the report. I… | ||
| Scan167 | Instructing the stores to despatch a 'Silca' sparking plug for testing. | ||
| View original record | X1812 b. EP. from Hs. c. to Mr. Chatwin(Stores.) Hs3/LG19.9.21. We are sending into the Stores for despatch to James. E. Withers, Esq. 46, Maresfield Gardens, Hampstead, London, N.W. 1 "Silca"… | ||
| Scan168 | Letter regarding pre-ignition issues with ignition plugs and the successful testing of new Champion plugs. | ||
| View original record | Oyl - G 20981 X1812 b. Sept. 20, 1921 RECEIVED STAMP: W.G. 4 OCT 1921 Mr. Claude Johnson, Managing Director, Rolls-Royce Ltd., London, England. Attention: Messrs. Royce & Hives. Dear Sir:- Re:… | ||
| Scan169 | Sales letter from The Anger Manufacturing & Supply Co Ltd regarding their 'AMASCO' Sparking Plugs. | ||
| View original record | TELEGRAPHIC ADDRESS: "BRAKJUSTER, PRESTON." TELEPHONE No 1033 PRESTON TELEGRAPHIC CODES: LIEBERS. A.B.C. 5TH EDITION WESTERN UNION. THE ANGER MANUFACTURING & SUPPLY CO LTD MANUFACTURERS OF RAILWAY &… | ||
| Scan170 | Page two of a letter from The Anger Manufacturing & Supply Co. Ltd. proposing a trial order for 'AMASCO' sparking plugs. | ||
| View original record | -2- but returnable for credit when returned carriage paid and received by us, the same to be returned in ten days. We would be very pleased if you would let us have an opportunity of interesting you… | ||
| Scan171 | Advertisement for 'The Anger Amasco Plug', an all-British-made sparking plug. | ||
| View original record | The Anger “Amasco” Plug AN ALL-BRITISH-MADE SPARKING PLUG. Made under Massed Production. With Porcelain Type Insulators. PRICE : : : : : : 5/- Each. AMASCO FORD N°1 AMASCO N°2 AMASCO N°3 The finest… | ||
| Scan172 | Letter responding to a query about a non-receipt of spark plugs and requesting dispatch details. | ||
| View original record | X1812 G- Hs4/LG. 22nd. Sept. 1921. George Roberts, C/o Peak, Frean & Co. Ltd., Drummond Road, London S.E.16. Dear Sir, Referring to your letter of the 16th.inst. we regret to say that we cannot trace… | ||
| Scan173 | Letter from George Roberts of Peek, Frean & Co. Ltd. confirming a recent inquiry about 'Prima' sparking plugs. | ||
| View original record | GEORGE ROBERTS, % PEEK, FREAN & CO. LTD., DRUMMOND ROAD, LONDON, S.E.16. TELEGRAMS:"PICKAXE, LONDON." TELEPHONE: 3570 HOP (EIGHT LINES) LONDON, S.E. 16. 22. Sept. 1921 X1812-b. Messrs Rolls Royce Ltd… | ||
| Scan174 | Letter from George Roberts concerning a parcel of Sparking Plugs that may have been misplaced upon arrival. | ||
| View original record | X1812b GEORGE ROBERTS, c/o PEEK, FREAN & CO. LTD., DRUMMOND ROAD, LONDON, S.E.16. TELEGRAMS: "PICKAXE, LONDON" TELEPHONE: 3570 HOP (EIGHT LINES) LONDON/S.E. 16. 23rd September 1921 Messrs.… | ||
| Scan175 | Letter from George Roberts sending 'Prima' sparking plugs for testing and offering the UK manufacturing and sales rights. | ||
| View original record | C O P Y. 12th July 21 Messrs. Rolls-Royce, Ltd., Nightingale Road, Derby. Dear Sirs, Referring to memorandum No.2507, dated 2nd June 1921, from your Inspection Department, I am sending you this day by… | ||
| Scan176 | Letter regarding a lost parcel of plugs sent to the Experimental Dept, requesting a new sample for a preliminary report. | ||
| View original record | X1812C HSL/LG. 24th. Sept. 1921. Geo. Roberts, Co/ Peak Frean & Co. Ltd., Drummond Rd. London, S.E.16. Dear Sir, Referring to your letter of the 23rd. inst. We have now traced that the registered… | ||
| Scan177 | Request to search for a customer's misplaced spark plugs sent for experimentation. | ||
| View original record | R. H. 950 s (10 T) (S.B. 972, 14-4-20) G. 2674 X18120 H3/TB/26.9.21. S/W Hs. Re - Chassis 79-TW. G. Roberts, Esq. This owner was good enough to send us some plugs for experiment. We understand that… | ||
| Scan178 | Letter from Philip Challis regarding a report on the design features of the Silca Sparking-Plug. | ||
| View original record | [Handwritten at top: X1812 b] [Handwritten at top left: HS] Your reference CJ.from HS. HS2/LG14.921 C.Johnson Esq., Messrs Rolls-Royce,Ltd., 15, Conduit Street, W. 1. 30, CARLISLE MANSIONS, VICTORIA,… | ||
| Scan179 | Letter from George Roberts regarding a missing correspondence and offering to send a new series of 12 plugs for trial. | ||
| View original record | XR12b GEORGE ROBERTS, % PEEK, FREAN & CO. LTD., DRUMMOND ROAD, LONDON, S.E.16. TELEGRAMS: "PICKAXE, LONDON" TELEPHONE: 3570 HOP (EIGHT LINES) LONDON, S.E. 16. 26th Septembeng 21. Messrs Rolls-Royce… | ||
| Scan180 | From 'R' discussing the testing of Spinx spark plugs as a potential alternative to unreliable Mercury plugs. | ||
| View original record | To Lts. from R. c. to C.J. X.1812. RE SPARKING PLUGS X.4295 X.1026. While away I was interested in looking over several samples of sparking plugs. I was favourably impressed with the ordinary standard… | ||
| Scan181 | Follow-up communication awaiting a reply regarding plugs sent by Mr. G. Roberts for chassis 79-TW. | ||
| View original record | R R 940a (20 T) S H Bks. 31-9-20) G 2843 X. 1812 G H4/TB/41021. S/W Hs. X1812 Re - Chassis 79-TW. G. Roberts, Esq. We are anxiously awaiting a reply to my H3/TB/26.9.21, because until we hear from you… | ||
| Scan182 | Correspondence regarding the misplacement of sparking plugs sent by G. Roberts Esq. for testing. | ||
| View original record | X1812L H. from Hs. Hs3/LG10.10.21. With reference to the sparking plugs sent here by G. Roberts Esq. We are very sorry to say we have not so far located these plugs. We have written to Mr. Roberts… | ||
| Scan183 | Letter from George Roberts sending 'Prima' spark plugs for testing, noting a potential thread incompatibility. | ||
| View original record | GEORGE ROBERTS, c/o PEEK, FREAN & CO., LTD., DRUMMOND ROAD, LONDON, S.E.16. TELEGRAMS: "PICKAXE, LONDON" TELEPHONE: 3570 HOP (EIGHT LINES) LONDON, S.E.16. 13th October, 1921. X1812b Messrs… | ||
| Scan184 | Letter acknowledging the receipt of 7 Prima Sparking Plugs for a future report. | ||
| View original record | R.R. Bks. (100 T) (S.H. 728, 10-12-20) G. 2047 X1812 G. Hs4/LG. 15th. Oct. 1921. Geo. Roberts, C/O Peak, Frean & Co.Ltd., Drummond Road, London S.E.16. Dear Sir, We are in receipt of 7 Prima Sparking… | ||
| Scan185 | Letter regarding the submission of two sets of 'Prima' sparking plugs for testing. | ||
| View original record | Experimental Dept. Dear sirs, You will no doubt have received from Folkestone a small parcel containing a further set of 6. Prima sparking plugs with a gap of 0.75 m/m for battery ignition. I shall… | ||
| Scan186 | Postcard addressed to the Experimental Department in Derby. | ||
| View original record | POST CARD ROTHERHITHE S.E.16 3.45 PM 29 OCT 21 THREE HALFPENCE Messrs. Rolls Royce Ltd Experimental Department Nightingale Road Derby RECEIVED | ||
| Scan187 | Second set of plugs for Chassis 79-TW. | ||
| View original record | X1812l. To Hs. from JS. JS2/D2.11.21. Re: George Roberts, Esq. - Chassis 79-TW. I attach hereto copy of a memorandum regarding the second set of plugs forwarded to the Works by Mr. Roberts. JS. FC NOV… | ||
| Scan188 | Opportunity to acquire manufacturing rights for special plugs from a French inventor. | ||
| View original record | 61812G To H. " CJ. Bt4/EP/31.10.21. Re: George Roberts - Chassis 79-TW. This gentleman telephoned to-day to request that you might be informed that he had obtained and despatched to W. a second set of… | ||
| Scan189 | Letter from AC Sparking Plug Co. Ltd. confirming a quotation and announcing a new English-made plug. | ||
| View original record | X18122 Telephone: KENSINGTON 6518. Telegrams & Cables: ACSPARKO, SOUTHKENS, LONDON. Codes: Western Union, Lieber's, Bentley's, Private. AC Sparking Plug Co.Ltd. 2, Thurloe Place, LONDON, S.W.7. Your… | ||
| Scan190 | Letter from George Roberts confirming the despatch of six Prima Sparking Plugs for testing. | ||
| View original record | GEORGE ROBERTS, % PEEK, FREAN & CO. LTD., DRUMMOND ROAD, LONDON, S.E.16. TELEGRAMS:"PICKAXE, LONDON" TELEPHONE: 3570 HOP (EIGHT LINES) X1812l. LONDON, S.E. 16. 8th November 1921 Messrs. Rolls Royce,… | ||
| Scan191 | Follow-up note regarding the performance of a set of Prima Sparking Plugs, attached to the original letter. | ||
| View original record | X18120 This is the copy of a letter sent by me to you a fortnight ago. I should feel obliged if you could let me know what results you have hitherto secured from the use of these plugs - 8th November… | ||
| Scan192 | Chasing a response for Mr. George Roberts regarding plugs and English rights negotiation for chassis 79-TW. | ||
| View original record | K R 950 s (OT) (S H 103, 24-9-20) G 2848 S/W. NSJ X1812B. Bt1/EP/17.11.21. Re:- George Roberts - Chassis 79-TW. With reference to my memo Bt4/EP/31.10.21 and other correspondence, will you kindly let… | ||
| Scan193 | Pamphlet on sparking plugs from Barracloughs (Engineers) Ltd. | ||
| View original record | Hs. X18/2e- ROY/Ms3/FJ23.11.21. Barracloughs (Engineers) Ltd., Bradford. A representative from the above firm called this morning and we attach hereto pamphlet referring to Sparking Plugs. We are… | ||
| Scan194 | Product page for the 'Patent Model M.W' and 'Bradford Patent Plug', showing the complete assembly and its individual parts. | ||
| View original record | PATENT MODEL M.W SHOWING PLUG COMPLETE. Supplied in ½" Whitworth Taper Gas Thread for "FORD" Cars, Metric Thread for most English and French Cars, and A.L.A.M. Thread for certain American Cars. THE… | ||
| Scan195 | Guarantee and information leaflet for 'The Bradford' patent plugs. | ||
| View original record | Geo. H. Barraclough THE BRADFORD PATENT PLUGS. (Patent No. 137967). REGISTERED BHB TRADE MARK BRADFORD Sole Patentees and Manufacturers: BARRACLOUGHS (Engineers) LTD., ELECTRICAL & MECHANICAL… | ||
| Scan196 | Letter regarding a delay in testing Prima Sparking Plugs. | ||
| View original record | X1812l. HS5/LG 26th. Nov. 1921. Geo. Roberts Esq., C/o Peak Frean & Co.Ltd., Drummond Rd., London S.E.16. Dear Sir, Attached herewith is our report on the Prima Sparking Plug. We regret that there has… | ||
| Scan197 | Technical evaluation and test report on the 'PRIMA' sparking plug. | ||
| View original record | "PRIMA" SPARKING PLUG. These plugs were supplied to us for test by - Mr. Geo. Roberts. General Construction. The plugs are made with mica insulation - the centre insulated portion of the plug being… | ||
| Scan198 | Test report conclusion on Prima spark plugs, finding them inferior and not recommended for use. | ||
| View original record | -2- The fibre sleeves fitted to the outside of the plugs also shrunk and became loose. Conclusion. We do not consider the Prima plugs have any advantages over such plugs as the K.L.G - Lodge etc.etc.… | ||
| Scan199 | Letter of acknowledgement for a report regarding unsatisfactory Prima plugs. | ||
| View original record | TELEPHONE, WIMBLEDON 13 MAT HOLME, PARKSIDE, WIMBLEDON, S.W. 19. X1812/en 28 Nov. 21 Experimental RECEIVED RECEIVED 29 NOV 1921 Messrs Rolls Royce Ltd Derby Dear Sirs, I am in receipt of your letter… | ||
| Scan200 | Extract from a report detailing a visit to West Wittering regarding spark plug testing for the Goshawk engine. | ||
| View original record | X1812 a Extract from R7/M30.12.21. RE VISIT OF MESSRS HS. & HY TO WEST WITTERING ON WEDNESDAY, 21st. DECEMBER 1921. (9) SPARKING PLUGS. X.1812. X.1918. It is now reported that the best plugs for the… | ||
| Scan201 | Requesting attendance at a conference to agree on a policy for ordering sparking plugs. | ||
| View original record | By. from Wd. c. to EP. c. to Hm. c. to D/BF. c. to Hs. X1812 C.- F. R. Wd11/NJ27.1.22. Sparking Plugs. In order to agree on the best policy to adopt in respect of ordering sparking plugs, it is… | ||
| Scan202 | Letter from C. G. Mason offering a trial set of a French device, 'L'Eclateur Cure', for testing on Aero and car engines. | ||
| View original record | "Holme Lodge" 9, Leamington Park, Acton, W. Feb.3rd. 1922. Messrs Rolls Royce Ltd. Derby. Dear Sirs, re/ L'Eclateur Cure. With reference to the enclosed particulars of the above device, may I arrange… | ||
| Scan203 | Product information and fitting instructions for the 'L'Eclateur Cure' spark plug device. | ||
| View original record | 212A. SHAFTESBURY AVENUE, W.C. 2. L'ECLATEUR CURE. Breveté S.G.D.G. Patent applied for. ============================== Misfiring of your Plugs rendered impossible. Any existing Plug, even if choked… | ||
| Scan204 | Letter from C. Meier-Mattes & Co offering Deltavis Sparking Plugs for testing. | ||
| View original record | C.MEIER-MATTES & CO X1812 b C.MEIER-MATTES SWISS U.BRETSCHER SWISS TELEPHONE: CITY 3376 TELEGR: DELTAVIS CANNON LONDON SOLE AGENTS OF *DELTAVIS CO SWITZERLAND* FOR U.K. BRIT. COL & DOMS LEADING SWISS… | ||
| Scan205 | Letter from C. Meier-Mattes & Co regarding Deltavis sparking plugs and other precision parts. | ||
| View original record | C-MEIER-MATTES & CO C.MEIER-MATTES SWISS U.BRETSCHER SWISS TELEPHONE: CITY 3376 TELEGR: DELTAVIS CANNON LONDON SOLE AGENTS OF ★DELTAVIS CO SWITZERLAND★ FOR U.K. BRIT.COL & DOMS LEADING SWISS MAKERS OF… | ||
| Scan206 | Sales letter from Pickard, Dobson & Co Ltd offering a trial set of their 'Platomac' Sparking Plugs. | ||
| View original record | Telephone: 7542 CENTRAL. Telegrams: "Platomac," Manchester. Directors: W. PICKARD. D. R. DOBSON. H. HOLDEN. Works: Claremont Road, Rusholme, Manchester. Telephone: 500 Rusholme. Telegrams: "Automac,"… | ||
| Scan207 | Instructional leaflet and advertisement for Platomaс spark plugs, detailing gap settings and showing a parts diagram. | ||
| View original record | IMPORTANT. We recommend for English cars a setting of 12 to 15 thous. of an inch; for Fords and American cars 15 to 17 thous. of an inch. If, after use, you note a yellowish colour at the point, it… | ||
| Scan208 | Directions for adjusting the gap on a spark plug using a spanner with a built-in feeler gauge. | ||
| View original record | DIRECTIONS FOR ADJUSTING. To adjust the gap, use the small spanner and loosen the nut, only slightly. The feeler gauge end of the spanner has four graduations, the first being 10 thous. of an inch,… | ||
| Scan209 | Advertisement for the Platomac detachable and adjustable sparking plug. | ||
| View original record | The PLATOMAC Detachable and Adjustable SPARKING PLUG. (NON-CARBONISING). (Patents pending). The Platomac Non Oil-Short-Circuiting Plug is cut from steel bar by automatic machinery, the insulation is… | ||
| Scan210 | Review of various automotive accessories including a non-fouling spark plug, a spring gaiter, and one-man hood fittings. | ||
| View original record | April 27, 1921. 543 The Motor ACCESSORIES.—Contd. tral insulator, and the terminal gap, which is made of insulating material. The insulator is of mica, having a taper which fits very accurately a… | ||
| Scan211 | Request to arrange testing for eight Type D3 Mica Plugs sent in by the Igna Engineering Co. Ltd. | ||
| View original record | EP. ----- X1812 e. ROY.1/AG.25.4.22. ------------------ Herewith eight Type D3 Mica Plugs sent in by the Igna Engineering Co. Ltd., which they are anxious we should test. If you think any useful… | ||
| Scan212 | Letter from Deltavis Co's agent following up on six type Z2 sparking plugs sent for testing. | ||
| View original record | C·MEIER-MATTES & Cº DCº TRADE MARK C. MEIER-MATTES SWISS U. BRETSCHER SWISS TELEPHONE: CITY 3376 TELEGR: DELTAVIS CANNON LONDON SOLE AGENTS OF ★DELTAVIS Cº SWITZERLAND★ FOR U.K. BRIT. COL. & DOMS.… | ||
| Scan213 | Internal request to purchase a Westinghouse Neon Gas Spark Plug Tester for the Experimental Department. | ||
| View original record | x1812l To Wd/Ms. from EFC. EFC1/T23.6.22. RE WESTINGHOUSE NEON GAS PLUG TESTER Would you kindly order up and obtain from the City Service Garage, Osmaston Road, 1 Westinghouse Neon Gas Spark Plug… | ||
| Scan214 | Instructions and report on the testing of Del'tavis 215 type plugs. | ||
| View original record | RR 26 10M BKS (SH 688 5-11-20) MP 231103 X1812 C. ROLLS-ROYCE LTD. INSTRUCTIONS. To Mr Hives 4/7/ 1922 Order No. Customer's No. Del'tavis 215 type Plugs These plugs were fitted to 1 EX on the 18/3/22… | ||
| Scan215 | Forwarding a letter and a Sparking Plug Remover from the Runbaken Magneto Co. Ltd. | ||
| View original record | Hs. from O.O. X1812 Wd/Dn2/HP19.7.22. We attach hereto copy of a letter from The Runbaken Magneto Co.Ltd., and we also forward the Sparking Plug Remover referred to in their letter. Will you please… | ||
| Scan216 | Sales letter from The Runbaken Magneto Co Ltd. proposing an accessory for vehicles. | ||
| View original record | R.R. 199 (600 H) (SD. 296. 15.8.17) M.P. 178549. COPY OF A LETTER RECEIVED FROM:- THE RUNBAKEN MAGNETO CO LTD., DERBY STREET, MANCHESTER. JHR/RR. 13th July.1922. Messrs. Rolls-Royce Ltd., Nightingale… | ||
| Scan217 | Promotional leaflet for Swiss-made Deltavis spark plugs, valves, whistles, and precision screw parts. | ||
| View original record | Panel 1: SPARKING PLUGS "DELTAVIS" (Made in Switzerland) Two models which can be used for most cars. (Special models for motor cycles, small cars, Buick, Nash and Franklin, Overland, Fordson Tractors,… | ||
| Scan218 | Advertisement leaflet for turned precision parts and high-class screwed ware, detailing types, prices, and quality benefits. | ||
| View original record | TURNED PRECISION PARTS & HIGH-CLASS SCREWED WARE FOR ALL TRADES IN ALL METALS Aeronautical, Gas, Nautical Cinematograph, Instrument, Optical Clock, Machinery, Scientific Cycle, Medical, Telephone… | ||
| Scan219 | Testing of K.L.G. sparking plugs and the decision to temporarily use Lodge plugs due to potential overoiling issues. | ||
| View original record | X1812 L. PF BY: c. to Hs. EP/Thn7/H7.9.22. Re. 40/50 Chassis Wiring & Ignition. Sparking Plugs. A.T. X1812 X 4295 X 1918 With reference to your memo BY4/H9.8.22, we are testing a number of the K.L.G.… | ||
| Scan220 | Performance and selection of ignition plugs for the 40/50 and Goshawk models. | ||
| View original record | X1812 C. BY. c. to Wd. c. to Hs. c. to E. EP15/H26.9.22. RECEIVED STAMP: Hs SFF 29 SEP 1922 re. IGNITION PLUGS. We are now having to turn out our 40/50 chassis with Lodge C.9 plugs in the intermediate… | ||
| Scan221 | Suitability and performance of different spark plugs (K.L.G. and Lodge C.9) for the 40/50 car. | ||
| View original record | (2) I do not feel, however, that the K.L.G. plug is a suitable plug for use on the 40/50 car except for the p pocket position, but it does not appear to show any direct advantage as regards ordinary… | ||
| Scan222 | Sending 'M' and 'D' type Metric Plugs from the Forward Sparking Plug Co. for testing. | ||
| View original record | X.5780 81812 c Hs. ROY/Ms4/DB29.9.22. We send herewith 6 type "M" Metric Plugs and 6 type "D" Metric Plugs from the Forward Sparking Plug Co. Will you kindly have same tested and let us have your… | ||
| Scan223 | Letter from A. Picard offering a free set of JAM spark plugs for testing. | ||
| View original record | MOTOR AND GENERAL ENGINEERING CONTRACTOR. Handwritten top right: X1812a A. PICARD. PARIS: 28, RUE BERGÈRE. TELEPHONE: GUT 09.55. LA LICORNE CARS. CHAPUIS-DORNIER ENGINES, ALSO UNITS FOR CYCLECARS.… | ||
| Scan224 | Translated testimonial letter regarding the satisfactory performance of J.A.M. plugs. | ||
| View original record | TRANSLATION TESTIMONIAL COMPAGNIE DES MESSAGERIES AERIENNES Union des Constructeurs d'Avions pour l'Etude et l'entreprise des transports Aériens 2 Rue Galilée. Paris Paris 9th November 1921. Monsieur… | ||
| Scan225 | Testimonial letter from driver Rougier regarding the performance of JAM spark plugs. | ||
| View original record | AEROPLANES G.VOISIN, 36 Boulevard Gambetta, ISSY-les-MOULINEAUX, AERONAUTIQUE AUTOMOBILE - MECANIQUE 6th June, 1922. Etablissements Industriels J.A.M. 129 Boulevard St Denis, BOURBEVOIE. Dear Sir, In… | ||
| Scan226 | Translated testimonial from a customer regarding the performance of plugs after winning a race. | ||
| View original record | TRANSLATION TESTIMONIAL AEROPLANES G.VOISIN, 36 Boulevard Gambetta, ISSY-les-MOULINEAUX. 7th June, 1922. AERONAUTIQUE - AUTOMOBILE - MECANIQUE Etablissements Industriels J.A.M 129 Boulevard St Denis,… | ||
| Scan227 | Translated testimonial letter regarding the performance of spark plugs during a Grand Prix event. | ||
| View original record | TRANSLATION of TESTIMONIAL. AEROPLANES G VOISIN, 36 Boulevard Gambetta ISSY-les-MOULINEAUX. 24th July, 1922. BOUGIES J. A. M. 129 Bd St Denis, COURBEVOIE (Seine) Dear Sirs, In the name of my friends… | ||
| Scan228 | Translated testimonial from Etablissements Bablot regarding satisfaction with plugs used in the Boulogne races. | ||
| View original record | TRANSLATION of TESTIMONIAL. From: ETABLISSEMENTS BABLOT, 170 Cours Lieutaud, MARSEILLE. Marseille 5th August, 1922. ETABLISSEMENTS J.A.M. 128 Bd St Denis, COURBEVOIE. (Seine) Dear Sirs, I am glad to… | ||
| Scan229 | Translated testimonial regarding the standard adoption of J.A.M. plugs Nos 1 and 2 for Hispano Suiza engines. | ||
| View original record | TRANSLATION of TESTIMONIAL AERONAUTIQUE & TRANSPORTS AERIENS SERVICE TECHNIQUE de l'AERONAUTIQUE 2, RUE JEANNE D'ARC ISSY-les-MOULINEAUX, le 29 December, 1921. No 17735/M SERVICE DES ETUDES… | ||
| Scan230 | From GWH to Mr. Hives detailing the results of testing M type and D type forward sparking plugs. | ||
| View original record | Mr. Hives from GWH. *3780 818/2C. 12.10.22. Roy/MS4/PD29.9.22. RE. FORWARD SPARKING PLUGS. We have tested these plugs on 49-GB and 6.EX Cars. The Mica plugs (M type) have failed in pocket position on… | ||
| Scan231 | Test report on Block Sparking Plugs type 12/20, noting pre-ignition issues and power loss. | ||
| View original record | Mr. Hives from GWH. X1812l. 23.11.22. BLOCK SPARKING PLUGS - type 12/20. These plugs have been tested on the test bed engine and have run 10 hours. We had to change a valve due to pre-ignition from… | ||
| Scan232 | Promotional letter from W. Courte Elektro-Industrie regarding their 'Wico-Eko' three-pole spark plug. | ||
| View original record | W.COURTE*ELEKTRO-INDUSTRIE für Bau-und Maschinenwellen GIRO-KONTEN: BANK FÜR HANDEL U. INDUSTRIE, DEPOSITEN-KASSE P., BERLIN W 15, KURFÜRSTENDAMM 26a. POSTSCHECK-KONTO: BERLIN 30604 AMT UHLAND 9396 u.… | ||
| Scan233 | Sales proposal for 'Wico-Mko' Spark-Plugs and a 'Wico' Spark-Plug-Contact. | ||
| View original record | concurrence on most places of the world, my "Wico-Mko" Spark-Plug has conquered the market with these facts. Shipment: 5 000 to 10 000 Spark-Plugs may be shipped within 4 - 6 weeks after ordering.… | ||
| Scan234 | Advertisement leaflet for an EKO spark plug with 3 electrodes. | ||
| View original record | EKO PLUG 3 electrodes Best workmanship Improved construction Most durable Best nickel electrodes Absolutely gastight Easy to take to pieces Carbonisation impossible The EKO plug is supplied but in… | ||
| Scan235 | Multilingual promotional leaflet for the 'Wico' electrical immersion heater. | ||
| View original record | WICO „Wico” der elektrische Schnellſieder LETZTE NEUHEIT! „Wico-Schnellſieder” iſt patentamtlich geſchützt. Iſt infolge ſeines kleinen Formats und ſeiner Handlichkeit für jedes Gefäß geeignet. Erwärmt… | ||
| Scan236 | Letter from Dowden & Company regarding a client's positive feedback on a Petrol Indicator and 'Block' plugs, which are being sent for testing. | ||
| View original record | X.1812.b. 67, Jermyn Street, St. James's, London S.W.1. X.1807 X.1812 Nov. 6th. 1922. X3896 /X1412 Dear Sirs, A Client of ours, Mr. Douglas-Hamilton, informs us that he has brought before the notice… | ||
| Scan237 | Follow-up letter from Dowden & Company regarding Petrol Indicator and 'Block' plugs sent for testing. | ||
| View original record | X.1812. C. 67, Jermyn Street, St. James's, London S.W.1. Dec. 20th. 1922. X.1812. X.1807. Dear Sirs, On Nov. 6th. last we forwarded you Petrol Indicator and 1 dozen "Block" plugs for you to test and… | ||
| Scan238 | Burnt valves, pre-ignition causes related to spark plugs, and engine performance observations. | ||
| View original record | To Hs. from R. c. to CJ. BJ c. to PN. Wor. c. to RG. BY. c. to HM. OY. c. to EP. X1812 b.. RL/M29.12.22. RE. BURNT VALVES X.2764. X.1812. X.3733. I am very pleased you find my fears of close clearance… | ||
| Scan239 | The practice of pinning piston rings and its effect on gas-tightness, referencing the 40/50 and Hawk engines. | ||
| View original record | contd:- -2- America had abandoned pinning the piston rings. I think this would reduce efficiency of gas-tightness, and occasionally become disastrous unless a more complex ring was used. Personally I… | ||
| Scan240 | Letter to Messrs. Dowden & Co. rejecting their Block sparking plugs and petrol level indicator after testing. | ||
| View original record | X.1812l. Hs6/LG. Messrs. Dowden & Co., 67, Jermyn Street, St. James's, London S.W.1. 6th. Jan. 1923. X.1807 X.1812. Dear Sirs, Some time ago we received from you a Petrol Level Indicator and 1 dozen… | ||
| Scan241 | Despatch of a Petrol Level Indicator and sparking plugs to Messrs. Dowden for testing and examination. | ||
| View original record | To BP. from Hs. c. to Chat. c. to NRC. X.1812.l Hs10/LG6.1.23. [crossed out]X.1907.[/crossed out] [crossed out]X.896[/crossed out] X.1812. We are sending into the Stores for despatch to Messrs.… | ||
| Scan242 | Letter from Dowden & Co. regarding the receipt of a parcel containing a petrol indicator and sparking plugs. | ||
| View original record | TELEPHONE: A. 8503. TELEGRAMS: PEPEDO, COLOGNE. DOWDEN & CO. MANUFACTURERS AGENTS, EXPORT & IMPORT MERCHANTS. HEAD OFFICE. VENLOER STRASSE 23, COLOGNE. Bankers: Lloyds & National Provincial Foreign… | ||
| Scan243 | Ignition plug and switching arrangements for the 40/50 & Goshawk models. | ||
| View original record | X1812 l. To Hs. from R. c. to CJ. Wor. c. to FN. OY. c. to BJ. BY. c. to E. EP. R1/140.1.23. RE. IGNITION - 40/50 & GOSHAWK X.1413. X.1812 X.4560. Naturally we cannot get much advantage from the use… | ||
| Scan244 | Forwarding particulars for Block plugs and Level Indicators supplied by Messrs. Dowden of London. | ||
| View original record | Hr. from Hs/LG. c. to Mr. Dickson Shipping O. X 1812 l. Hs/LG18.1.23. We have been asked by Mr. Dickson (Shipping Office) to forward to you particulars of Block plugs and Level Indicator supplied to… | ||
| Scan245 | Standardisation of the C.56 Lodge ignition plug for 40/50 & Goshawk models, based on a conversation with Mr. Royce. | ||
| View original record | X1812e. EP. from BY. Hs. BY1/P23.1.23. 40/50 & GOSHAWK - IGNITION PLUG & WIRING. X.4425 X.4091 X.1812. During my recent visit to Mr. Royce he asked me to make a special note that he was anxious to… | ||
| Scan246 | Request for a suitable cheap spark plug for engine gear quietening tests due to over-oiling issues. | ||
| View original record | (COPY) X1812 R. HS. EP10/H16.7.24. re. Sparking Plugs for Testing. We have considerable trouble with sparking plugs on the engine gear quietening stand, due to overoiling. Do you know of a good cheap… | ||
| Scan247 | Two special sparking plugs received from Paris for examination and expressing doubts about their utility. | ||
| View original record | X1812 C. Hs. I am handing you herewith two special sparking plugs that have been sent to me from Paris. The Plugs in question are specials; in fact they appear to be so special that one very much… | ||
| Scan248 | Trouble with sparking plugs on the engine gear quietening stand due to over-oiling, requesting a cheap alternative. | ||
| View original record | Hs. X1812L. EP10/H16.7.24. re. Sparking Plugs for Testing. We have considerable trouble with sparking plugs on the engine gear quietening stand, due to over-oiling. Do you know of a good cheap plug… | ||
| Scan249 | Letter regarding a set of eight Deltavis Z.II sparking plugs sent for testing and evaluation. | ||
| View original record | X1812 C Hs. BY15/H. 28. 8. 24. SPARKING PLUGS. ---------------- In connection with chassis, we are sending you herewith a set of eight sparking plugs, Deltavis Z.II, which have been supplied to us by… | ||
| Scan250 | Query regarding issues with K.L.G. and Lodge sparking plugs during engine testing and a request for a recommendation for a cheap porcelain alternative. | ||
| View original record | X1812 C. HS. EWT/CEP6/EC13.11.24. Re. 20-HP & 40/50-HP Chassis Testing - Sparking Plugs. We find it beneficial during the routine of unit engine testing and the quietening of engine gears to use a… | ||
| Scan251 | Recommendation to obtain Champion Sparking Plugs for 20 HP & 40/50 HP chassis testing due to their resistance to sooting. | ||
| View original record | To EWT/CEP. from Hs. X1812l Hs10/LG19.11.24. Re. 20 HP. & 40/50 HP. Chassis Testing - Sparking Plugs. Handwritten Notes: X1812 (crossed out), X4196 (crossed out), X4091, X1918 Referring to… | ||
| Scan252 | Special short sparking plugs for testing that are no longer required by R.A.F. Stores. | ||
| View original record | Hs. X1812 a To | ||
| Scan253 | Letter forwarding an enquiry about special sparking plugs to the Derby Works for consideration. | ||
| View original record | X18120. S/W (For Hs) CWB.13/AMC/22.7.27. I have received the enclosed letter regarding some special sparking plugs which may be of interest to you. I have done nothing in the matter beyond… | ||
| Scan254 | Letter from Alfred Lalli, a mechanical engineer, offering Eyquem sparking plugs for aeroplane engines for testing. | ||
| View original record | MOTOR COMPONENTS AND ACCESSORIES. SPARE PART SPECIALISTS FOR ITALIAN MOTOR VEHICLES. Alfred Lalli A. AM. INST. MECHANICAL ENGINEER. OFFICES AND SHOW ROOMS: 57, EDGWARE ROAD, (MARBLE ARCH END) LONDON.… | ||
| Scan255 | Leakage tests on K.L.G. and Champion sparking plugs intended for use with leaded fuel. | ||
| View original record | ? X1812 a. EFC. 15.9.27. LEAKAGE TESTS ON SPARKING PLUGS TO BE USED WITH FUEL CONTAINING LEAD. The twelve sparking plugs, 6 K.L.G. and 6 Champion, submitted to us have been given a preliminary test.… | ||
| Scan256 | Investigation into engine pinking caused by a fine powder deposit on spark plugs and a proposal to update cleaning instructions. | ||
| View original record | S/W. Hs. Copy to:- BP. By. H. X1812D. CWB14/GM/22-9-27. CLEANING OF SPARKING PLUGS. In a complaint case of pinking some few months ago, Frith of the Inspection Department, suggested that the cause… | ||
| Scan257 | Request to test spark plugs from a Swiss manufacturer and provide a report. | ||
| View original record | X181-b Dear Hs. My Brother brought in a man called A. H. Sieger of the C. H. Zundkerzeufabrikag of Basle, Switzerland. He is connected with some sparking plugs and is very anxious to know if you would… | ||
| Scan258 | Query regarding condensation issues with Aero Engine ignition plugs on the Condor engine and 20-HP cars. | ||
| View original record | Hs. C. Rg. X/812a. EP11/H24.11.27. re. AERO ENGINE IGNITION PLUGS. The hand starting of the Condor engine in service is generally satisfactory, and the only real trouble we have experienced is the… | ||
| Scan259 | Extract questioning why English makers cannot produce porcelain ignition plugs equal to Champion for aero engines. | ||
| View original record | X14120. Extract from R3/M28.11.27. What is stopping English makers from making porcelain ignition plugs equal to Champion, as we understand these are superior to anything on aero engines - i.e. most… | ||
| Scan260 | Letter from C.G. Spencer & Sons Ltd. apologising for a bad report on plugs tested on an Aero Engine. | ||
| View original record | TELEGRAPHIC ADDRESS: "AERONAUT, LONDON". TELEPHONE: HIGHBURY GROVE, CLISSOLD 1893. FIRST IN 1835. FOREMOST TO-DAY. CONTRACTORS TO THE AIR MINISTRY, ADMIRALTY, WAR OFFICE AND FOREIGN GOVERNMENTS. C.G.… | ||
| Scan261 | Circular letter regarding sparking plugs used on engine type tests. | ||
| View original record | X1812a. Aeronautical Inspection Directorate. Messrs Rolls Royce Ltd., January 10th.1928. [STAMP: RECEIVED 11 JAN 1928] Mr. Platford. Mr. Rowledge. ✓ Mr. Hives. Mr. Bailey. Mr. Grinage. A.I.D. A.I.D.… | ||
| Scan262 | Circular letter detailing the standard procedure for using and testing sparking plugs during engine type tests. | ||
| View original record | COPY. Aeronautical Inspection Directorate. Air Ministry. London. W.C.2. Dec. 8th. 1925. 59906/25/I.E.I.b. Inspector-in-Charge, A.I.D. Messrs Rolls Royce Ltd., Derby. CIRCULAR LETTER NO. 63. Sparking… | ||
| Scan263 | Summary of sparking plug trouble experienced during an F.12 type test. | ||
| View original record | X1812a Mor. C. BV. C. RB. C. HS. C. S. c. Py. for Lp. and Col. Fell. EP8/H20.1.28. re. F. 12. TYPE TEST. Further to our report EP9/H.18.1.28. we give below summary of the Sparking Plug trouble… | ||
| Scan264 | Sales letter from Desmo Ltd. offering their 'Flexi Plug Cover' for aero engines, including a sample for testing. | ||
| View original record | Directors: R. G. RICHARDS. T. E. SELLERS. H. CLAYTON-WRIGHT. London Branch: 10, GRAPE STREET, SHAFTESBURY AVENUE, W.C.2 Scottish Branch: DESMO LIMITED, 5, OSWALD STREET, GLASGOW DESMO LIMITED Head… | ||
| Scan265 | Spark plug development at Farnborough, discussing overheating issues and proposing a cooling solution. | ||
| View original record | To R. from Lr. c. to BJ. Hor. [BJ is struck through] c. to NG. E. c. to BY. EP. [BY is struck through] Y1872A Hs Lr5/LG4.10.28. SPARKING PLUGS. -------------- As regards plug development at… | ||
| Scan266 | Unsatisfactory bonding wire clips on armoured cables for F engines, with suggestions for improvement. | ||
| View original record | X1812a. To RG. from Hs/TAG. c. to BY. c. to Wor. c. to EP. Hs/TAGL/LG20.10.28. BONDING CLIPS ON ARMOURED CABLES ON F. ENGINES. X1812 X4436 We would like to draw your attention to the unsatisfactory… | ||
| Scan267 | Quoting a letter from J. A. Stevens Ltd. regarding the dispatch of twenty-four platinum-tipped spark plugs. | ||
| View original record | XL912a. S/W. To Hs. from Lp. c. to [REDACTED]. Lp2/Av/D1.12.28. Under date of the 29th November Messrs. J. A. Stevens Ltd. have written us as follows:- " Replying to your letter of the 28th inst. ref:… | ||
| Scan268 | Letter regarding the supply and testing of special plugs from Germany for Mr. Hives. | ||
| View original record | Lpl/Av/Dl.12.28. 1st December 1928. Messrs. J. A. Stevens, Ltd., Automobile Electrical Engineers, Upper Rathbone Place, W. 1. Dear Sirs, We are in receipt of your letter of the 29th ult. and have… | ||
| Scan269 | Outlining the procedure for requisitioning spare parts for Air Ministry engines. | ||
| View original record | BP. c. to Hs. X18/2a. D/BP/N3/B19.1.29. We herewith give you an extract from Air Ministry letter reference 340252/28 relative to E.1.(b) type engines. "In reply to your letter, subject and reference… | ||
| Scan270 | Return of Jupiter sparking plugs due to a lack of interest in testing them. | ||
| View original record | X.1812a. Hs4/LC21.2.29. To ROY/GEA. from Hs. We are returning to you herewith the Jupiter sparking plugs. We are not interested in these plugs and are in a position to test them, Hs. | ||
| Scan271 | Analysis of ignition plug temperature, pre-ignition, and cooling in an aluminium cylinder head. | ||
| View original record | R. from E. c. to SG. Hs. BY. X1812-a. E1/M10.4.29. INDIA 4. - COMPRESSION RATIO & PREIGNITION. X.790 HS/ACLL/LG28.3.29. X.1812 X.5970 X.5050 (1) HIGHER TEMPERATURE OF IGNITION PLUGS. Regarding the… | ||
| Scan272 | Engine design modifications, including compression ratio, plug cooling, and ignition advance. | ||
| View original record | contd :- -2- With the proposed reduction in the India 4. compression ratio however there is a distinct opportunity of considerably improving the water cooling of the plug. We propose to add .125"… | ||
| Scan273 | Conclusions from a cylinder head test, proposing modifications to the combustion chamber, plug, and compression ratio. | ||
| View original record | contd :- -3- CONCLUSIONS : (1) It is suggested that there is a definite hot spot immediately under the plug on the actual cyl. XX head tested. (2) It is proposed to modify the combustion chamber to… | ||