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 functionality, application, and suitability of the Remy Thermostat Unit.
| Identifier | ExFiles\Box 48\3\ Scan006 | |
| Date | 4th August 1921 | |
| X.4200 Oy10 - G 4821 August 4, 1921 Mr. Claude Johnson, Managing Director, Rolls-Royce Ltd., London, England. Attention: Messrs. Royce & Clarke. Dear Sir:- X.4200 Re: Remy Thermostat Unit. X.294 Replying H3/ G 4.7.21. [Stamped with red ink: COPY] The Remy thermostat unit was sent at the request of Mr. E. {Mr Elliott - Chief Engineer} F. {Mr Friese} Clarke. The letter from the Remy people sent with my covering letter Oy7/G23.5.21 to Mr. Clarke (Copy to Mr. Royce) explains the functioning of the device. The device does more than save a too small dynamo from roasting, as suggested by Mr. Royce. It also serves to keep the battery from getting overcharged in summertime or on long runs, when the heating up of the generator will automatically operate the device and reduce the output of the generator. Conversely it enables one to set a third brush generator to give a big out-put suitable for winter work without roasting itself in summer. The thermostat is attached inside the frame of the generator. Besides being used on all Remy products, it is standard on the Delco third-brush generators used on the Lafayette, Cadillac, Wills-St.Claire and other cars. The device strikes us as offering good possibilities for reducing the difficulties of a constant current third brush system in a climate which varies from summer temperatures of 100°F. {Mr Friese} to winter temperatures of 20°F. {Mr Friese} below zero. In England it might never serve any useful purpose. MO/G Yours truly, ROLLS-ROYCE OF AMERICA, Inc. Per M. {Mr Moon / Mr Moore} Olly | ||