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).
Technical description of an auto-switch for regulating battery charging and an experiment to reduce dynamo output.
| Identifier | WestWitteringFiles\Q\February1927-March1927\ 94 | |
| Date | 20th March 1913 | |
| ENG 1906 -5- Contd. MRH 20/3/13. (1000 8-12) 5M. 23.1.13 accuracy. This auto-switch is a voltmeter, but an auto-matic one. It is preferable to the voltmeter in that it does not introduce the human element. It appears so far as we have gone, to shew prospect of giving every satis-faction and being a reliable means of regulating the charging and keeping down the overcharging of the battery. The auto-switch can be added to the existing system with practically no alteration in the run of the wires. Even if the auto-switch at any time did not work correctly, we still have either full or reduced charge as the case may be. The two auto-switches at present on chassis will be allowed to run indefinitely. They are at present function-ing quite correctly and doing the work for which they are intended without requiring any attention whatever. The batteries are never charged at a high rate when already fully charged, but are charged at the high rate when their charge has been depleted for any reason. Concerning the question of sufficiency or insuffic-iency of output curves of various magnitudes, it may be of interest to know that we, at Mr. Minchin's request, arranged the output of his dynamo to an exaggeratedly reduced amount for the winter months, the peak of the curve being 3 amperes less than normal. This was done by control brush position and not by resistance in the field, so that the curve still Side annotations: Passed by SW T.9 TYPE QUANTITY | ||