From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Letter from the Ministry of Munitions of War regarding the sensitive construction of an Electrolytic Vacuum Valve.
| Identifier | ExFiles\Box 41\2\ Scan007 | |
| Date | 3rd October 1919 | |
| X 3646 MINISTRY OF MUNITIONS OF WAR. AIR GROUP. Telegrams: "TECHNIDEP, WESTCENT, LONDON." 'Phone: REGENT 6700 EXTENSION. 315 Trunk Line: AIRCRAFT PRODUCTION, LONDON (EXTENSION............). TECHNICAL DEPARTMENT, KINGSWAY, LONDON, W.C.2. PLEASE ADDRESS YOUR REPLY TO THE CONTROLLER, AND QUOTE THE FOLLOWING REFERENCE -> Room 447 D.2. Subject Date 3rd October, 1919. To Messrs. Rolls-Royce Ltd., Nightingale Road, DERBY. Gentlemen, ELECTROLYTIC VACUUM VALVE. With reference to your EFC9/T. of the 26th ulto., it is presumed that the device referred to is the Thermionic valve, which is supplied by The General Electric Co. Ltd., Osram Lamp Works, Hammersmith, London, W. For your information it is pointed out that this device is of extremely sensitive construction and it is necessary to take all possible precaution to prevent it being subjected to vibration in service. Yours faithfully, S.C. Biggs Flt. Lieut, R.A.F. for Squadron Leader, R.A.F. Acting Head of D.2. for Director of Research. CR{Mr Cra???ster / Mr Chichester} SWP/GF. | ||