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 regarding an investigation into a thermostat bellows issue and the supply of new samples.
| Identifier | ExFiles\Box 156\2\ scan0079 | |
| Date | 3rd May 1938 | |
| 108 1328 CONTRACTORS TO ADMIRALTY, WAR OFFICE & AIR MINISTRY BY APPOINTMENT TO HIS MAJESTY THE KING TELEPHONE: GLADSTONE 3333 (20 LINES) TELEGRAMS: SPEEDOFAC, PHONE, LONDON. CABLES: SPEEDOFAC, LONDON. CODES: MARCONI, COMMERCIAL, BENTLEY'S. S. Smith & Sons (Motor Accessories) Ltd BRANCHES AT PARIS MILAN SYDNEY WELLINGTON AGENCIES AND SERVICE STATIONS THROUGHOUT THE BRITISH EMPIRE AND IN ALL THE PRINCIPAL COUNTRIES SHOWROOMS & DEPOTS 179-185 GT PORTLAND ST LONDON, W.1. 26-33, COX ST LIVERY ST BIRMINGHAM 14a JACKSONS ROW DEANSGATE MANCHESTER 21, DRURY STREET GLASGOW DUBLIN & BELFAST CRICKLEWOOD WORKS, LONDON, N.W.2 Please quote our reference: S.10 Messrs. Rolls-Royce Ltd., DERBY. 3rd May, 1938. Dear Sirs, For the attention of Mr. C.S. Steadman. With reference to Thermostat, code X.30065/5, which you handed to the writer after having punctured the bellows and ascertained that it only went open 3/32", we have investigated this matter with our Experimental Department and it has now come to light that in order to obtain the higher setting you require, namely, 78/80°C., and without using a special liquid they added extra turns to the valve making a total of eight instead of our usual three to five. This, of course, robs the bellows of its effective stroke in the event of bellows puncture and fully explains why you only obtained a lift of 3/32". We confirm again that to obtain the lift you require it is merely necessary for us to supply units with additional convolutions in the bellows. We are accordingly making up two samples - one for test and the other which you can puncture. These will be forwarded to you in the course of the next few days. Yours faithfully, For S. SMITH & SONS (MOTOR ACCESSORIES) LIMITED. THERMOSTATIC CONTROL DEPARTMENT. To avoid delay all envelopes should be addressed to the firm. | ||