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).
Different types of thermostats, their application, and the advantages of a dynamo-incorporated thermostatic output control.
| Identifier | WestWitteringFiles\U\January1930-April1930\ Scan010 | |
| Date | 2nd January 1930 | |
| EFC4/AD2.1.30 contd. -4- current contacts directly. In the former case there is no "overlap" effect the expansion being unrestricted by solid friction. This is a disadvantage in the domestic application. In the latter case the thermostat unit incorporates a permanent horseshoe magnet which acts on an armature affixed to the moving contact end of the bimetal flexural beam in such a manner as to cause a delay in contact point separation and remeeting, with the consequent advantage of eliminating the difficulty of light contact pressure such as occurs with non-overlap thermostats at the time of operation. It is only the latter case of bimetal cum permanent magnet thermostat which is of interest in the present connection. The writer's sample of this is not yet in use but shortly will be. Its construction gives every appearance of reliability in service. Some time ago, at our request a sample of a Remy Thermostatic control switch was sent over (to W.W.) by Mr.Olley, but we never saw this personally and do not know what became of it. It might be of interest in the present connection. It is hardly necessary to refer in detail to the various advantages of a reliable system of dynamo incorporated thermostatic output control in the varying circumstances of climate, season, state of charge, conditions of use etc. The opinions of others on this matter would be interesting. EFC. | ||