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).
Instructions regarding bevelled brushes and control spring pressure.
| Identifier | ExFiles\Box 50\5\ Scan252 | |
| Date | 6th November 1918 | |
| RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Order No Customer's No. Z 19 than best suits their use with bevelled brushes, but the part in contact with the brush makes the necessary angle with the line joining this point to the spring spindle, so that they will bear correctly on the top surface of a bevelled positive brush, when new. The control spring, if given 180° more twist than that which gives a minimum pressure, extends about the correct amount, and the pressure ranges from 6 lb to 7 lb. An old control spring gave from 6 lb to 8 lb. Signed F.{Mr Friese} J.{Mr Johnson W.M.} Allen This Sheet must be filed on completion of the work. | ||