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).
Broken brush spring and ill-fitting replacement brushes causing noise, with a suggestion for improvement.
| Identifier | ExFiles\Box 51\5\ Scan184 | |
| Date | 16th November 1921 guessed | |
| Contd. -2- EFC {E. Fowler Clarke - Electrical Engineer} 6/T. One brush spring has unfortunately broken and we should be glad of a replacement. Also we find these new brushes to be rather too narrow for the brush holders. This seems to cause a certain amount of brush noise which we materally reduced by introducing soft pads of insulating tape between the springs and the brushes. Therefore we think there is room for a little improvement here in any further machines you may be making up for us. Yours faithfully, | ||