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).
Comparison of standard and proposed parallel arrangements for an actuator box, including tables of amperage, turns, and load capacity.
| Identifier | WestWitteringFiles\D\December1919\ Scan32 | |
| Date | 23th December 1919 | |
| Contd. -2- EK9/T23.12.19. between the coming on of the main switch and the actuator box. With the other combination, the time lag was, as far as could be judged, entirely done away with, unless the push button switch were so lightly operated as to make carbon contact only, which of course reduces the current considerably. Increasing the power of the actuator box in this manner increases the amperes taken when the coils are reasonably cool, according to the following table:- Standard parallel arrangement. { Main switch 1.3 { Actuator box 2.6 { Total. 3.9 Proposed parallel arrangement. { Main switch 1.3 { Actuator box. 6.2 { Total. 7.5 The comparative turns and ampere turns of the actuator box are as follows:- Amps. Turns. A.T. Standard { 2.6 x 1200 = 3120 Proposed { 6.2 x 800 = 4960 The maximum load applied to the end of the arm of the actuator box to cause the lever to remain against the stop when put, is 2 lbs.10 ozs in the standard case, and 5 lbs13 ozs. in the proposed case, the coils being cool and the stop being such that the possible travel of the end of the arm is .200". If these figures be compared Contd. | ||