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).
Recommendation to use 'Foxboro' thermometers instead of 'Cambridge' thermometers for cars built in the U.S.A.
| Identifier | ExFiles\Box 171\3\ img090 | |
| Date | 16th March 1921 | |
| THERMOMETERS FOR CARS IN THE U.S.A. Now that it has been decided that cars built in U.S.A. shall not have a Thermostat but instead shall have Shutters and a Thermometer, we recommend that Springfield obtain there own Thermometers. I saw samples of the 'Foxoboro' Thermometer in U.S.A. which were better instruments than those we obtain from the Cambridge Instrument Company. The improvements in them over the Cambridge are as follows:- (1) The soldered joints are carried out in a better manner. The small tube at the joint is reinforced by a piece of flexible tube so as to avoid the pipe being kinked at the joint where it suddenly becomes very stiff. (2) The method of making the joint of the bulb in the pipe is better. On these instruments they use the cone joint like an ordinary union. This has the advantage that as soon as the nut is loosened the bulb is free and there is no tendency for it to twist round and for the small tube to be broken. (3) the scale is given in fahrenheit which is the standard temperature scale used in U.S.A. (4) The cost of this instrument at Springfield is 12 dollars instead of 21 dollars for the Cambridge Instrument at Springfield. They have had a great number of failures in U.S.A. with the Cambridge thermometers and have been unable to get them repaired. Hs.{Lord Ernest Hives - Chair} | ||