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 discussing the design of continuous current brake magnets.
| Identifier | ExFiles\Box 180\M6\ img037 | |
| Date | 13th July 1928 | |
| REG. TELEGRAPHIC ADDRESS: "ROYCE, WEST WITTERINGHenry Royce's home town" | TWO WORDS ONLY. TELEPHONE: CHICHESTER 210. STATION - PASSENGER & GOODS: CHICHESTER - 7 MILES. L. B. & S. C. RLY. "ELMSTEADHenry Royce's home in West Wittering," WEST WITTERINGHenry Royce's home town, NR. CHICHESTER. 13th. July 1928. Copy to Mr. Claremont. " " Mr. Allcock. " " Mr. Hulley. Mr. J.C. Bentley. ROYCE LTD. MANCHESTER. Dear Mr. Bentley, CONTINUOUS CURRENT BRAKE MAGNETS. I have not seen that we have any designs which can be considered entirely up-to-date and satisfactory. I suggest that we make a two limbed magnet for the continuous current work exactly on the lines of the 3 phase. It need not have expensive stampings, but could be made of thicker stampings of iron or steel of good permeability, but causing no fear with regard to hysterisis losses. One of the advantages would be that the dashpot, the operation, the method of fixing, and casing, would all be identical, even to the coil formers. There is a great advantage in a double limbed magnet as regards the foot pounds lifted for the weight of the complete device. Yours faithfully, F.H. Royce See Drg / B479 | ||