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).
With diagrams discussing alternative designs for securing a hydraulic shock damper piston.
| Identifier | WestWitteringFiles\V\March1931-September1931\ Scan117 | |
| Date | 14th April 1931 | |
| DA{Bernard Day - Chassis Design}/HDY.{William Hardy} ) FROM R.{Sir Henry Royce} HS{Lord Ernest Hives - Chair}/RM.{William Robotham - Chief Engineer} ) (At Le CanadelHenry Royce's French residence.) [Text crossed out: C. to SG.{Arthur F. Sidgreaves - MD} WOR{Arthur Wormald - General Works Manager}-] [Text crossed out: C. to E.{Mr Elliott - Chief Engineer} BY] ORIGINAL HYDRAULIC SHOCK DAMPERS My work on these gets crowded out. I am arranging that the piston should be held together with long screws with cheese heads for the spring, thus: [Diagram 1 annotations:] Spring washer. Lock nut. Tapped in piston 1 1/2 dia. Or perhaps here. Conical Fairly close fit. Spring space. [Diagram 2 annotations:] 1 B.A. all the way. Plain parallel screw would do if we could rely on it stopping the right distance, or - [Diagram 3 annotations:] 1 or 2 B.A. [Handwritten dimension on diagram: 1/4] They are all secured by the same kind of check nut and spring washer. Naturally the parallel one is cheap and quite good except for stopping correctly. The bore for the head might be larger than for spring so that when screwed as far as possible the end would not be too far through the nut. R.{Sir Henry Royce} [Stamp text: RECEIVED 1931 APR 21 HS{Lord Ernest Hives - Chair}] [Handwritten: x235.] | ||