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).
Hand-drawn cross-sectional diagram of a lever and servo mechanism.
| Identifier | WestWitteringFiles\R\January1928-March1928\ 132 | |
| Date | 13th March 1928 guessed | |
| BEARING. REAR ROPE ON BOSS OF BEVEL. FIXED LEVER ON CASING. FLOATING LEVER WITH SUITABLE DOG DRIVE TO SERVO. | ||