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. regarding the inability to supply an Electric Rev. Counter with a specific calibration, offering alternatives.
| Identifier | ExFiles\Box 165\2\ img309 | |
| Date | 6th March 1941 | |
| A.T. SPEEDOMETER Co., Chronos Works, NORTH CIRCULAR ROAD, LONDON, N.W.2. Directors: W. Henderson-Cleland. Sir Allan Gordon-Smith, D.L. Ralph Gordon-Smith. H.{Arthur M. Hanbury - Head Complaints} R.{Sir Henry Royce} Buckland. Instrument Specialists On Admiralty Approved List for supply of Tachometers, Revolution Indicators, Counters, Speedometers, etc. Telep. GLADSTONE 113. Telegrams: AYTESPEEDO, PHONE LONDON. Please quote our Ref. AFA/LAH RP 1517 Messrs.Rolls-Royce Ltd., Nightingale Road, Derby. 6th.March 1941. For the attention of Mr.Childs. Dear Sirs, Further to your enquiries for Electric Rev.Counters, we now learn that we are unable to supply an Electric Rev.Counter with a calibration of .7916, but we can do a 2 - 1 or 4 - 1 ratio, so we are wondering whether you would like us to supply the Electric Rev.Counter as 2 - 1 and the magnetic instrument as .7916 ratio. It is rather interesting to note this, we are afraid you will have difficulty in regard to Electric Rev.Counters with these odd ratios so perhaps you will give this matter your consideration before it is developed too far. In the meantime we await your early reply to enable us to go ahead with these sample instruments. We beg to remain, Yours faithfully, pp. A.T.Speedometer Co.Ltd., ALL COMMUNICATIONS TO BE ADDRESSED TO THE COMPANY. | ||