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).
The components and operational principles of a post-war R. Bosch electrical system received for examination and testing.
| Identifier | WestWitteringFiles\J\December1922\ Scan90 | |
| Date | 20th December 1922 | |
| To R & E.{Mr Elliott - Chief Engineer} from EFC. c. CJ. & FN. c. Ry. & EP.{G. Eric Platford - Chief Quality Engineer} c. Rg.{Mr Rowledge} & Dn. c. Not. ORIGINAL EFC1/T20.12.22. X.4562 - POST WAR R.{Sir Henry Royce} BOSCH ELECTRICAL SYSTEM. We have lately received for examination and test an R.{Sir Henry Royce} Bosch electrical equipment comprising:- (1) Dynamo, with which are incorporated the regulator and cutout units. (2) Motor, with which is incorporated the solenoid operated main switch and automatic magnetic pinion engagement. (3) Switchbox. These three units provide the equivalent of dynamo, switchbox and cutout, junction box, starter motor, and Bendix, main switch, actuator box and push button switch on our 40/50 equipment, and in addition also serve one or two minor functions. The dynamo is a four-pole machine with simple shunt winding, and housed in the commutator end cover are the regulator and cutout units. The principles of operation of the dynamo and regulator units have been described recently in our EFC5/T16.11.22. Bench tests of the dynamo unit are now in progress. A blueprint diagram of the connections of the whole system is attached. It will be seen that the regulator unit operates mainly by a volt coil though partly - by a current coil. In the first stage of the regulating range a resistance is inserted in the series of the field circuit and short circuited alternatively by the vibration | ||