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).
Description of the starter switch, switchbox functions, and various lighting and magneto connections.
| Identifier | WestWitteringFiles\J\December1922\ Scan92 | |
| Date | 20th December 1922 | |
| Contd. -3- EFCL/T20.12.22. is higher, i.e. when the engine has fired and is endeavouring to turn the motor still faster; the voltage on the solenoid main coil and auxiliary field winding being then sufficiently small. The main starter switch is also provided with a contact so that during the starting operation a boosting current is supplied to the magneto armature as indicated in the diagram, by connection 37. As regards the switchbox, this provides in addition to the 'off' position, four positions. No.1 puts on the inspection lamp and body lighting alone. No.2 gives side, tail and inspection lamp and body lighting. No.3 gives head, tail and inspection lamp and body lighting. No.4 head, side and tail, and inspection lamp and body lighting. This switch is lockable in any of these positions. The act of locking also mechanically prevents the starter motor push button from being operated. No charging switch is provided. When the switchbox is unlocked and the dynamo not charging, a supply of current is available for the relay of the starter motor by the push button. Also a small lamp with a red glass on the switchbox is lighted. When the cutout is on contact this supply is removed, the lamp goes out and the motor cannot be operated. On the other hand, when the car is stationary and the switchbox is locked the supply to the lamp is again cut off by a switch operated by the key. At the same time the magneto is earthed by connection 2. Contd. | ||