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).
Urgent order for six modified thermostats from the British Thermostat Co. Ltd.
| Identifier | ExFiles\Box 156\1\ scan0081 | |
| Date | 3rd May 1935 | |
| To Roy {Sir Henry Royce} : x4508 Hs {Lord Ernest Hives - Chair} /Std.12/KW.3.5.35. Will you please order from The British Thermostat Co.Ltd., six Thermostats to E.86612 except that they are to be modified to commence opening from 1.275" at 75°C ± 2°C. and to be fully expanded to .1.525" when the temperature has reached 85° - this range of 10°C. must not be exceeded. Will you please urge this order. Hs {Lord Ernest Hives - Chair} /Std. | ||