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).
Proposal for an easy-change gearbox device using a vacuum-assisted clutch mechanism.
| Identifier | ExFiles\Box 6\4\ 04-page213 | |
| Date | 14th April 1929 | |
| DA{Bernard Day - Chassis Design}/HDY.{William Hardy} By) FROM R.{Sir Henry Royce} E.{Mr Elliott - Chief Engineer} Hs.{Lord Ernest Hives - Chair}) (At Le CanadelHenry Royce's French residence.) X4310 R2/14.4.29 Rec'd at WW. 18.4.29. C. to Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} Mr.Claremont. X7310 GEARBOXES - EASY CHANGE DEVICES. X4310 When it is desired to change the throttle is always closed during the operation so that the gears can be relived. When the clutch is out, just as it becomes free, the pedal might work a valve, thus - FOR SKETCH SEE ORIGINAL. and admit suction to a cylinder which might throw out the Salerni or similar clutch on the transmission or gearbox side-shaft. So that no more motion or load need be on the clutch pedal. Can we do anything with this idea? It might be worth an English provisional. R.{Sir Henry Royce} | ||