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).
Proposed modification to the design of hydraulic shock dampers, focusing on the piston and side links.
| Identifier | WestWitteringFiles\V\October1930-February1931\ Scan209 | |
| Date | 15th January 1931 | |
| DA{Bernard Day - Chassis Design}/HDY.{William Hardy} R.{Sir Henry Royce} ) FROM R.{Sir Henry Royce} BY.{R.W. Bailey - Chief Engineer} HS.{Lord Ernest Hives - Chair} ) (At Le CanadelHenry Royce's French residence.) C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} HYDRAULIC SHOCK DAMPERS. I am not quite content with some of the details of our latest design of the above, and I shew on the attached sketch a modification which I think is better - in words, replace the stirrup as follows: (1) The piston has a square hole right through it cleaned out on two sides by broach. (2) The bottom of the hole is filled in by round disc caulked in suitable to stand the 500 or 600 lbs. per sq. in. (3) A piece of bright drawn square bar is bored up for the spring and cut off in an automatic. It is left solid at the lower end, where it is cross drilled for the pin carrying the side links. The ends of this pin are squared and the links having square holes in their lower ends are rivetted tightly on this cross pin, the torsional rigidity of which prevents the piston from getting out of square. The upper ends of the links have round holes for an easily replaceable pin through the cam ends, or if square must be rivetted up - see sketch. R.{Sir Henry Royce} | ||