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 purchase an apparatus for observing machinery, detailing its features and price.
| Identifier | ExFiles\Box 53\1\ Scan027 | |
| Date | 16th August 1922 | |
| Contd. -2- EFC {E. Fowler Clarke - Electrical Engineer} 1/T16.8.22. The advantage of the apparatus, therefore, is that it is put up into a form in which it is always ready for use and merely requires some kind of mechanical coupling between the machinery to be examined and the contact breaker of the apparatus. For this reason it is considered by Ev. {Ivan Evernden - coachwork} and Rg. {Mr Rowledge} that it would be distinctly worth while to purchase one of these instruments. The quoted price of the instrument complete is £125 and the delivery would be almost immediate. The definition given by the instrument on the moving parts is quite good. The contact breaker contains a change gear by which it is possible either to have exactly timed breaks so that the machinery observed appears stationary, or alternatively, a 1% creep, so that the moving parts appear to be functioning at one hundredth part of their normal. In the former case, the contact breaker can be turned by hand, if it is desired to observe any particular functioning of the machinery under observation. We attach to R's copy, a leaflet dealing with this apparatus. E F C. EFC. {E. Fowler Clarke - Electrical Engineer} | ||