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 S. Smith & Sons about a returned thermostat, suspecting it was subjected to overheating.
| Identifier | ExFiles\Box 156\2\ scan0251 | |
| Date | 24th July 1939 | |
| RP 81 S. SMITH & SONS [MOTOR ACCESSORIES] LTD. CRICKLEWOOD WORKS, LONDON. N.W.2. CONTINUATION NO. 1 Messrs. Rolls-Royce Limited. 24th July, 1939. order to satisfy yourselves with a stock Thermostat. We feel particularly happy in our minds that these Thermostats are correct in design and will do all we claim, i.e. go full open in the event of puncture but we find it difficult to explain what has happened in the case of the unit you have returned. We are suspicious that the instrument has been subjected to a temperature higher than the boiling point of water as this in itself would elongate the bellows so that it took a permanent set, in which case we would not expect it to go full open in the event of puncture. Perhaps you can let us know at what temperature the unit has been working. We are naturally concerned and do not like to think that you have found it necessary to return a faulty Thermostat for which we cannot give a satisfactory explanation, and it is for this reason we would like to have further details. Would you kindly note that Thermostats are dealt with by this Department and not Mr. Eckford. Yours faithfully, For S. SMITH & SONS (MOTOR ACCESSORIES) LIMITED. [Signature] THERMOSTATIC CONTROL DEPARTMENT. | ||