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 S. Smith & Sons concerning an Electrical Revolution Indicator and generator speed specifications.
| Identifier | ExFiles\Box 165\4\ img338 | |
| Date | 20th November 1935 | |
| CONTRACTORS TO ADMIRALTY, WAR OFFICE & AIR MINISTRY S. SMITH & SONS (Motor Accessories) Ltd CRICKLEWOOD WORKS LONDON, N.W.2 Handwritten: r60651 Header Left: ENGINEERING AND ALLIED EMPLOYERS' NATIONAL FEDERATION TELEPHONE: GLADSTONE 3333 (20 LINES) TELEGRAMS: SPEEDOFAC, PHONE, LONDON. BRANCHES AT PARIS MILAN SYDNEY WELLINGTON AGENCIES AND SERVICE STATIONS THROUGHOUT THE BRITISH EMPIRE AND IN ALL THE PRINCIPAL COUNTRIES Header Right: BY APPOINTMENT TO HIS MAJESTY THE KING CABLES: SPEEDOFAC, LONDON. CODES: MARCONI, COMMERCIAL, BENTLEY'S. SHOWROOMS & DEPOTS 179-185 GT PORTLAND ST LONDON W.1 26-33, COX ST LIVERY ST.{Capt. P. R. Strong} BIRMINGHAM 14a, JACKSONS ROW DEANSGATE MANCHESTER 21, DRURY STREET GLASGOW DUBLIN & BELFAST Please quote our reference: E.2. 20th November 1935. Handwritten: WST Messrs Rolls Royce Ltd., Derby. Dear Sirs, For the attention of Mr. West. re: Electrical Rev. Indicator. We thank you for your letter of the 18th inst, ref: Hs{Lord Ernest Hives - Chair}/Wst.12/MA. and note that the generator will be driven at 1.5 engine speed. We understand that normally the instrument will be required to register from 0 to 4,000 R.P.M. which means that the generator would be driven at 6,000 R.P.M. The type of Generator we are supplying for test, is not suitable for such high speeds and in order to prevent delay in preparing a special instrument, we are sending one which has been calibrated 0 to 3,000 R.P.M. corresponding to generator speed of 4,500 R.P.M. In the event of your tests proving satisfactory, we shall be glad to know whether you can arrange for the generator to be driven at the engine speed, if not it would be necessary for us to gear down to this speed. Your letter does not indicate the type of generator you prefer; we are therefore, despatching one to outline print x.40687, a copy of which is already in your possession. Furthermore it is, of course, understood that it will, in all probability, be necessary, at a later date, to make a special generator to suit your particular drive and we shall be pleased to proceed with this on receipt of the necessary drive particulars. Yours faithfully, for S. SMITH & SONS (MOTOR ACCESSORIES) LIMITED. Signature: A.S.Moull TO AVOID DELAY ALL ENVELOPES SHOULD BE ADDRESSED TO THE FIRM | ||