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 technical specification detailing the operating conditions and electrical characteristics of circuits.
| Identifier | ExFiles\Box 64\4\ scan0212 | |
| Date | 14th March 1929 guessed | |
| -2- Contd. Allowing 11 volts supply, the operating teazer current would be 11 ---- = 17.1 amperes. .643 The conditions of correct operation as regards this first circuit will therefore be: (a) With a current of 14 amperes through the teazer main and armature windings of the motor in series, the motor armature must be certain of turning and travelling longitudinally to the full extent. The armature must of itself recede to the full extent when the current is off. (b) 25 amperes of current must be capable of passing through the top contacts of the auxiliary switch and the contacts of the push button switch with no unsatisfactory result. Circuit 2. MAIN SWITCH. (Yellow) The pinion engaging longitudinal armature motion operates, near the end of its run, a switch on the motor which completes the final connection to earth of circuit 2. This circuit, consisting of the main switch coil with its non-inductive resistance in parallel, is also supplied through the push button switch. The supply voltage may be considered to be 10½. The estimated resistances at 45°C are as follows: Main switch coil ........ .89 ohms. Parallel non-inductive resistance ..... 15.9 " Compounded resistance.... .843 " Contd. | ||