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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 Delco-Remy & Hyatt Ltd. regarding the supply, testing, and fault diagnosis of circuit breakers.

Identifier  ExFiles\Box 61b\2\  scan0316
Date  11th February 1936
  
DELCO-REMY & HYATT LTD.
Head Office & Works
Telegrams: DELREMHAYAT, SOWEST, LONDON.
111, GROSVENOR ROAD, LONDON, S.W.1.
Telephones: VICTORIA 6242 (7 LINES)

[Handwritten]: 76119

[Stamp]: THE SOCIETY OF MOTOR MANUFACTURERS & TRADERS

H.E. West Esq.,
Messrs. Rolls Royce Ltd.,
Derby.

YOUR REF. Hs{Lord Ernest Hives - Chair}/Wst.4/MA
OUR REF. WCK/PG

SUBJECT

11th February..1936.

Dear Mr. West,

Confirming our telephone conversation yesterday morning, I am enclosing herewith for the purpose of either your inspection or for test purposes three circuit breaker levers of American construction and three circuit breakers of English construction.

The American circuit breaker is of slightly better construction and it is for this reason that we are having new tools made up to produce the best possible circuit breakers of this design, and these should be ready quite shortly.

From an inspection we have made of the returned defective circuit breaker we should have come to the conclusion, had we not been advised by you that the circuit breaker had been correctly adjusted, that the trouble might have been due to the fact that the circuit breaker gap was set too wide.

We would have suggested this because the circuit breaker point looks as if it had been hammering and, furthermore, the only trouble that Rushton can remember of circuit breakers of this design is the case of the circuit breaker we had on test at about 5,000 revolutions per minute of the cam on a six cylinder job at the last Olympia Show, under
  
  


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