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 with sketches discussing the design of a 3-phase motor brush spring for a slip ring type motor.
| Identifier | ExFiles\Box 180\M6\ img014 | |
| Date | 1st November 1929 | |
| Not finally seen by W. Royce. 2 REG. TELEGRAPHIC ADDRESS: "ROYCE" WEST WITTERINGHenry Royce's home town." TWO WORDS ONLY. TELEPHONE: CHICHESTER 210. STATION - PASSENGER & GOODS: CHICHESTER - 7 MILES. SOUTHERN RLY. "ELMSTEADHenry Royce's home in West Wittering," WEST WITTERINGHenry Royce's home town, NR. CHICHESTER. Mr. J.{Mr Johnson W.M.} C. Bentley. 1st. Nov. 1929. Dear Mr. Bentley, 3 PHASE MOTOR BRUSH. SLIP RING TYPE. Naturally you must use brushes that can be obtained easily, providing they have given satisfactory in long use. It is possible that the brush used in the way you shew may not gradually turn over if the brush holder is the best possible - i.e. longest guide, and near the slip ring. I suggested that the flex: might be at the side - I very much want to see if we can make a really good substantial spring which will do most of your brush-holder work. The end treated this way not so liable to break, as this: Split tube made from sheet steel with rounded edges. The steel is as wide as possible, preferably with rounded edges, then as thick and long as possible, i.e. we want to get ample steel in the spring. Yours faithfully, W. F.{Mr Friese} H.{Arthur M. Hanbury - Head Complaints} Royce R.{Sir Henry Royce} L. Marmont | ||