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).
Specifying requirements for a custom Harding Revolution Counter with a hand-operated clutch.
| Identifier | ExFiles\Box 63\1\ scan0073 | |
| Date | 23th November 1925 | |
| X 3035 To Ms. from EFC. EFC1/T23.11.25. X.3035 - HARDING REVOLUTION COUNTER. Further to our EFC4/T16.11.25. and letter refs. HEB{H. Biraben}/EN. of the 18th inst.from Messrs. Harding, Rhodes & Co. Ltd., we require a revolution counter similar to Hardings "Ideal" Counter, but one which,instead of being continuously driven, is fitted with a hand operated clutch start and stop. The reason of this is that the counter is to be used on a special ^speed indicator tester, driven at constant speed by a synchronous motor, and that the counter will be driven at 500 r.p.m.. so that it would be a little difficult to observe the readings of the^ordinary counter at any given instant. We do not see anything of the kind in the catalogue submitted to us, which we return. EFCa | ||