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 inspection and testing specification for a 40/50 HP switchbox arranged for half-charge switching.
| Identifier | ExFiles\Box 163\6\ img071 | |
| Date | 6th November 1930 | |
| X.7781sb.{Mr Bull/Mr Bannister} R.R. 40/50 HP. SWITCHBOX. X.6016. Specification of Production Inspection and Test of 40/50 HP. Switchbox arranged for half-charge switching. VERSION I. (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, both switches meanwhile 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, i.e. M & B, M B & C, and M & C. In the last position repeat the test between terminal N and the case. (3) Now test the correctness of the switching operations as follows :- | ||