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).
Continued description of a safety gap and a cam ring with a serrated periphery for fine adjustment.
| Identifier | WestWitteringFiles\E\November1920\ Scan69 | |
| Date | 6th November 1920 guessed | |
| -2- Contd. The safety gap is of the simplest design being merely a screw driven through the body over the high tension ring. A feature is the serrated periphery of the cam ring by means of which a fine adjustment of the control lever can be obtained. C.A.P. | ||