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).
Correspondence from S. Smith & Sons regarding a returned Model.2D Dynamo and test results for magnetic hum.
| Identifier | ExFiles\Box 3\5\ 05-page261 | |
| Date | 28th May 1920 | |
| X275 CONTRACTORS TO ADMIRALTY, WAR OFFICE & AIR BOARD Telephone MAYFAIR 6350 (6 lines) Code A.B.C 5th Edition Telegrams SPEEDOMET, TELEW, LONDON S. SMITH & SONS (M.A) LTD MANUFACTURERS OF MOTOR ACCESSORIES Branches at NEW YORK, PARIS, CAPE TOWN JOHANNESBURG, PORT ELIZABETH DURBAN, EAST LONDON, MELBOURNE SYDNEY, WELLINGTON, BANGKOK SOURABAYA Agencies in all civilized countries And at 122, ALMA ST, BIRMINGHAM AND 12, JACKSONS ROW, DEANSGATE, MANCHESTER Factories: CRICKLEWOOD, ACTON & CAMBERWELL SPEEDOMETER HOUSE, 179-185, Gt Portland St, London, W.1. Electrical Engineering Dept. OUR REF: ACL/FA. 28th. May. 1920. Messrs Rolls - Royce Ltd., Nightingale Road, DERBY. RECEIVED 30 MAY 1920 Dear Sirs, For the attention of Mr.R.Fowler Clark. Your letter of the 12th. inst., has been handed to us by the Sales Department for attention. We have duly received the Model.2D. Dynamo which you returned to us, and for which we thank you. We note that you are retaining the cutout, and shall be glad if you will keep this as long as you require it. We should be very pleased to hear whether you have made any tests on the new type of Dynamo, and whether you find it satisfactory. With regard to magnetic hum, when testing these special machines, we coupled them to a specially silent motor, and were unable to detect any hum, at speeds up to 2000.rpm. Hoping to hear from you with reference to this matter. Yours faithfully, p.p. S.SMITH & SONS. (M.A.) LTD. Archibald C. Lock | ||