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).
Numbered list of technical specifications and modifications for various components.
| Identifier | ExFiles\Box 64\4\ scan0255 | |
| Date | 26th April 1929 guessed | |
| -2- Contd. (11) Pinion spring of rather high rating but set-up force of initially small value. (12) Armature operated contact to be made over the last .200 of armature travel, i.e. an amount which exceeds the damper travel by .025". (13) Insulating support for fixed armature operated contact point to be of bakelite. (14) Main large diameter motor bearing to be of the harder phosphor bronze material recently decided upon. (15) Motor pinion to be of the recently instructed type giving increased tooth clearance. Then, in regard to the remainder of the equipment, the following:- (16) Push button two-way switch of the earlier type which has given more satisfactory results than the later one proposed for S.S. (17) Main and auxiliary switch unit with modified carbon arm flat spring, with gaps adjusted according to our recently issued Version H, bakelite mouldings to be brought in if at all possible. EFC. | ||