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 to The British Thermostat Co. Ltd. regarding the specifications for a thermostat sample.
| Identifier | ExFiles\Box 156\2\ scan0015 | |
| Date | 25th January 1938 | |
| ZX 2424 1328 January 25th.1938 Rm{William Robotham - Chief Engineer}/Std.3/AP. The British Thermostat Co.Ltd., Teddington Works, Windmill Road, Sunbury-on-Thames, MIDDLESEX. For the attention of Mr.Martin-Hurst. Dear Sirs, Referring to your letter of the 20th.ult., we have not yet received the thermostat to B.G.A.3754 mentioned therein. Your drawing does not show the actual valve seat dia., but from experiments with Messrs Smith's unit, we find that a seating diameter of 1 1/4" is desirable. Will you please arrange to use this valve seat dia. on the sample which you send us - the opening temperature should be 78 - 80°C. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||