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).
Specification of production inspection and test for a switchbox applicable to the Phantom type chassis.
| Identifier | ExFiles\Box 56\4\ Scan143 | |
| Date | 2nd January 1929 | |
| X5730. 2.1.29. X.7781sb.{Mr Bull/Mr Bannister} SWITCHBOX FOR R.R. CHASSIS. X.7730. X.5781sb.{Mr Bull/Mr Bannister} X.5730 SPECIFICATION OF PRODUCTION INSPECTION & TEST. VERSION 3. Applicable to switchbox of the standard Phantom type inside, adapted externally to the S.S. electrical system to operate therewith. (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 the centre terminal on the back, and earthed terminal connected to it, both switches mean-while being in their 'off' positions. kax Afterwards between the case and the centre terminal mentioned with the right hand switch in each of the switching positions, i.e. M & B, M B & C, and M & C. (3) Now test the correctness of the switching operations as follows :- Contd. | ||