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 a third brush dynamo with a vibrator controlled dynamo, outlining its advantages.
| Identifier | ExFiles\Box 60\3\ Scan215 | |
| Date | 17th March 1933 | |
| -3- Ha/Wst.6/W./17.3.33. Cont'd.{John DeLooze - Company Secretary} These are conditions the third brush dynamo did not fulfil as it did not give a high rate of charge when it should have done at low battery voltages, it had a high cutting in speed for all day running, and at high speeds the output was low and did not balance the discharge load. Actually however the dynamo with a vibrator regulator should have a much easier time than the previous statements might lead one to infer, due to the fact that the battery should always be in much better condition as regards its state of charge, the regulator limiting the average output of the dynamo. We should expect therefore the following advantages with the standardisation of vibrator controlled dynamos:- (1) A much longer life for the battery it being impossible to overcharge, and to undercharge under all normal running conditions. (2) Less topping up required for the battery and therefore less battery attention generally. (3) Less blackening of side lamps and much better head lamp brilliance. Ha/Wst. | ||