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 operation of the push button switch for the electric starter.
| Identifier | ExFiles\Box 26\2\ Scan130 | |
| Date | 19th July 1927 guessed | |
| -16- Contd. PUSH BUTTON SWITCH. The push button switch, like the main switch, has main copper contact and auxiliary carbon contacts which make first and break last, and serve to protect the copper contacts against sparking at break. In using the electric starter it is necessary to press the button well home, otherwise the whole current may have to flow through the carbon contacts, which will result in their deterioration. At the same time the main switch may be operated, without the jaw clutch actuator, when the starter motor will race without coming into gear. Contd. | ||