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).
Modified brushes for a 20 HP Dynamo.
| Identifier | ExFiles\Box 50\5\ Scan339 | |
| Date | 12th August 1924 | |
| V4333 C. EFC. {E. Fowler Clarke - Electrical Engineer} 4333 X.9670 - BRUSHES - 20 H.P. DYNAMO. BY {R.W. Bailey - Chief Engineer} /RD7/AL.12.8.24. Please receive herewith 1 print of:- D.51325 - Commutator Brush. D.51326 - " " (Control). These are standard brushes D.50761 and D.50736 except the radius where the brush touches the Commutator and the small chamfer, we have made this increase and added the chamfer to prevent the brushes chipping during the bedding in, owing to inaccuracies in the position of the Brush Holder. Would you please have three sets made up from standard brushes and hand same to EFC. {E. Fowler Clarke - Electrical Engineer} for test. BY {R.W. Bailey - Chief Engineer} /RD. | ||