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 discussing speedometer designs and tests.
| Identifier | ExFiles\Box 59\2\ Scan452 | |
| Date | 21th December 1934 | |
| ENGINEERING AND ALLIED EMPLOYERS' NATIONAL FEDERATION 1935 CONTRACTORS TO ADMIRALTY, WAR OFFICE & AIR MINISTRY BY APPOINTMENT TO HIS MAJESTY THE KING TELEPHONE: GLADSTONE 3333 (20 LINES) TELEGRAMS: SPEEDOFAC, PHONE, LONDON. S. Smith & Sons (Motor Accessories) Ltd CRICKLEWOOD WORKS LONDON, N.W.2 CABLES: SPEEDOFAC, LONDON. CODES: MARCONI, COMMERCIAL, BENTLEY'S. BRANCHES AT PARIS MILAN SYDNEY WELLINGTON AGENCIES AND SERVICE STATIONS THROUGHOUT THE BRITISH EMPIRE AND IN ALL THE PRINCIPAL COUNTRIES SHOWROOMS & DEPOTS: 179-185 GT PORTLAND ST LONDON, W.1. 26-33, COX ST LIVERY ST BIRMINGHAM 14a, JACKSONS ROW DEANSGATE MANCHESTER 21, DRURY STREET GLASGOW DUBLIN & BELFAST 86051. Please quote our reference: S.I. SALES DIRECTOR'S OFFICE. 21st December 1934. H.{Arthur M. Hanbury - Head Complaints} E.{Mr Elliott - Chief Engineer} West, Esq., Messrs. Rolls-Royce Ld, DERBY. Dear Mr. West, SPEEDOMETERS. Replying to yours of the 19th instant and in view of your observations I am arranging to make tests of the Graham-Paige Speedometer. Meantime, I think you will agree that the present A.T. instrument for all practical purposes is reasonably steady and it is undesirable to introduce any sort of damping device which is going to result in lag. I would explain that we have in the past made extensive experiments and tests with our own Governor and Magnetic designs of instruments in order to eliminate entirely any question of oscillation in the indicating hand and, whilst it is possible to ensure this by various means, in our experience the introduction of any sort of damping device is detrimental as sensitivity and accuracy are to some extent sacrificed in the process. Assuring you of our earnest cooperation in this | ||