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 Actuator Box and Push Button Switch mechanisms.
| Identifier | ExFiles\Box 26\2\ Scan044 | |
| Date | 16th October 1919 | |
| Contd. -9- EFC2/T6.10.19. (h) ACTUATOR BOX. The actuator box is also an electromagnetically operated mechanism and its purpose is to draw into gear dogs at the rear end of the gear box, which enable the power of the motor to be transmitted to the second motion shaft and so through the second motion shaft driving gears to the first motion shaft, and thence through the clutch to the engine. The mechanism of the actuator box consists of an armature on one end of a lever at which end there operates a spring toggle link so that the armature will stay, when put, in either the "in" or the "out" postion. The armature is drawn into the "in" position and the dogs are drawn together by a pull rod attched to the other or projecting end of above mentioned lever, when current is supplied to the magnetising coils, of this box. When the engine starts and overruns the motor, the armature is kicked back into the "out" position, by the action of the dogs, and will remain there when the push button switch is released. (i) PUSH BUTTON SWITCH. This is a switch which only remains in the "on" position when the button is depressed, and which is provided with copper contacts, and carbon contacts to take the break. It is used for completing the operating (or relay) circuits of the main switch and the actuator box, for the purpose of starting and is fitted to the dash in a position in which it can be operated by the foot if desired. Contd. | ||