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 A.T. Speedometer Co. Ltd. regarding speedometer temperature variation limits and testing Instrument No.A.728.
| Identifier | ExFiles\Box 50\4\ Scan302 | |
| Date | 28th June 1929 | |
| CONTRACTORS TO THE WAR OFFICE, THE ROYAL AIR FORCE, AND LEADING MANUFACTURERS. XH306 A.T. SPEEDOMETER CO. LTD. Trade Mark. DIRECTORS: W. HENDERSON-CLELAND, A. {Mr Adams} GORDON SMITH, H. {Arthur M. Hanbury - Head Complaints} R. {Sir Henry Royce} BUCKLAND Telephone: Chiswick 5122. Telegrams: Aytespeedo-Act, London. 183, The Vale, Acton, London, W.3. Expl.Dept. Your Ref. HS {Lord Ernest Hives - Chair} /RM {William Robotham - Chief Engineer} 4/LG. Our Ref. HCB/AL. 28th June, 1929 Messrs. Rolls-Royce Limited, Nightingale Road, Derby. PATENTEES & MAKERS OF MAGNETIC SPEEDOMETERS FOR MOTOR CARS AND MOTOR CYCLES. A.T. ELECTRIC SCREEN WIPERS AND PETROL LEVEL GAUGES. MOTOR CLOCKS, TACHOMETERS, MILEAGE RECORDERS. REVOLUTION COUNTERS AND INDICATORS FOR MOTOR CARS, MOTOR BOATS, ENGINES, ETC. ALL CLASSES OF SCIENTIFIC INSTRUMENTS. REPAIRS A SPECIALITY. Dear Sirs, We beg to acknowledge receipt of your esteemed favour of the 26th instant and can assure you that we are making every possible effort to keep within the specified limits of temperature variation with our Speedometers and believe we are adhering in all bulk deliveries to what you require. We could report further regarding Instrument No.A.728 if you would let us have it for our testing here. Yours faithfully, for A.T.SPEEDOMETER CO. LTD. [Signature] | ||