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).
Continued description of the operational requirements for an auxiliary switch circuit.
| Identifier | ExFiles\Box 64\4\ scan0215 | |
| Date | 14th March 1929 guessed | |
| -5- Contd. this circuit is therefore that - (g) A current of 3.2 amperes through the auxiliary switch coil must be capable of pulling down the auxiliary switch lever from the point at which the lower contacts are just made, also of holding the switch lever right down with considerable opposition to disturbance. The main switch coil current which caused the auxiliary switch to 'go over' has, in operation, been switched off as soon as the engine, by accelerating and allowing the armature to move out of engagement, has caused the motor switch to break its circuit. The auxiliary switch remains 'over' after the engine has started until the push button is released, but must be capable of holding 'over' firmly on only 9 volts during the time the main switch lever is returning and before the main current is off. EFC. | ||