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).
Production tests and inspection points for a 40/50 Switchbox designed for use with a Shunt Dynamo.
| Identifier | ExFiles\Box 62\3\ scan0415 | |
| Date | 27th January 1934 | |
| SPECIFICATION ELC2. PRODUCTION TESTS OF 40/50 SWITCHBOX. Type - For use with Shunt Dynamo. ---------- (1) Inspect the following points :- (a) The switch motion for correct operation as judged by the sensation of operating the switches. (b) Similarly, the operation of the gauge light press button. (c) The correct fit of the inspection lamp plug in its socket. (d) The locking mechanism for correct operation. (2) The insulation of the various switch contacts from the case of the switchbox shall now be tested by applying an alternating voltage of 200 through a low c.p. 200 volt lamp, between the case and each terminal in turn, with the exception of terminal O.{Mr Oldham} both switches mean-while being in their 'off' positions. Afterwards between the case and the magneto terminal mentioned with the right hand switch in each of the switching positions, M.B. and M.{Mr Moon / Mr Moore} (3) Now test the correctness of the switching operations as follows :- | ||