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).
Schematic diagram of a pin and cam actuating switch mechanism, including its method of control.
| Identifier | Morton\M3.3\ img012 | |
| Date | 2nd July 1918 | |
| E1/e-2218.. DMJ PIN AND CAM ACTUATING MECHANISM. STEEL SPRING & COPPER STRIP CARRYING CURRENT. LAMINATED COPPER BRUSH ON INSULATED BASE. CARBON BRUSH & FINAL BREAK TO AVOID BURNING THE CONTACTS. OFF POSITION. CONSTRUCTION OF THIS PART FROM SHEET METAL. METHOD OF CONTROL. TO START HANDLE SWITCH SLACK TO ENABLE CURRENT TO BE SWITCHED OFF WITHOUT TRYING TO PULL OUT THE DOGS IF ENGINE SEIZED UP. SPRING IN BASE DOGS WILL NOT ENGAGE. THE CURRENT MAY BE SWITCHED ON & THIS SPRING WILL PULL THE DOGS IN. SPRING TO HOLD DOGS OUT. MOTION IS ONLY SHOWN DIAGRAMMATICALLY & IS NOT INTENDED TO ILLUSTRATE POSITION OF LEVERS. C.M.G. 2/7/18 | ||