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).
Improvements to the dynamo and ignition platinum points.
| Identifier | ExFiles\Box 165\6\ img013 | |
| Date | 20th November 1925 | |
| X5660 EFC/T. 20.11.25. To Answering BJ18/H18.11.25 :- (5) ELECTRICAL EQUIPMENT. X5780 (a) DYNAMO. V5660 Steps have been taken to ensure that each dynamo leaves the works with correct brush clearances. If the clearances are below the limit now given the brushes have been known to become sluggish, due to oil vapour condensation. This will render unnecessary the slip of carborundum proposed, because provided the brushes do not become sluggish, the bedding will not go wrong in correct [circuit] circumstances. With regard to the withdrawal of the dynamo end cover, this is provided for in the manner described by Hs.{Lord Ernest Hives - Chair}'s note to CWB., copy of which is attached. (c) IGNITION PLATINUM POINTS X4652 Experiments are in progress with tungsten points and also with coils with finer primary windings taking less current, to improve the operation of the platinum points. Steps have already been made to improve the replaceability of the distribution box cover, and the improvement is on present production. | ||