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).
Instructions for testing electrical terminals and switch positions using a lamp.
| Identifier | ExFiles\Box 62\3\ scan0416 | |
| Date | 19th February 1934 guessed | |
| -2- (a) First connect terminal No.6 to the positive of a 12 volt battery and connect one terminal of a 12 volt lamp (preferably a large c.p. O.M.F. lamp) to the negative end of the battery. The wire from the other terminal of the lamp is used to touch successively of the various distributing terminals Nos.2, 3, 4 & 5 and it shall be verified in this manner that no light is obtained on these terminals with the switches in the 'off' position, but that :- (I) With S and T switched on, light is obtained from terminal 5 only. (II) With H S & T switched on, light is obtained from terminals Nos. 4 and 5. (III) With M & B only switched on, light is obtained from terminals Nos. 2 and 3. (IV) With B only switched on light is still obtained from terminals Nos.2 & 3. (V) With M only switched on, light is obtained from terminal No.2 only. (b) Connect battery positive to terminal 0, and loose terminal wire to case. Ascertain that no light is obtained except in the off and B positions. Now connect by a link, terminal No.6 to 0. Confirm, by switching slowly from the B position to the M position, and back again, that light can still be obtained from terminal No.3, when no light can be obtained by touching the case. (c) Remove battery positive from terminals 0 & 6 and connect it to 7. Then connect battery negative to case. Connect lamp between terminal GL{G. Linnett} and case and ascertain that it lights by operating the press button switch. Next, connect lamp terminals to inspection plug and ascertain that it is lighted by inserting the plug in its socket. Hs{Lord Ernest Hives - Chair}/Wst. | ||