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).
Review and proposed modifications for an adjustable throttle lever design.
| Identifier | Morton\M3.2\ img020 | |
| Date | 17th March 1925 | |
| GENERAL LAMP A FROM R.{Sir Henry Royce} AUTOMATIC CONTROL SECRET DATED R1/M17.3.25. C & M 177 Copy to - E.{Mr Elliott - Chief Engineer} A.{Mr Adams} C. " HS.{Lord Ernest Hives - Chair} Lec. 2011. ADJUSTABLE LEVER FOR THROTTLE. Y.8080 This seems passable but I think it might be more robust in one or two places. I am aware they were approved by me:- (1) Instead of the collar and gin lock the end of the throttle spindle might have nut and washer and split pin because the collar may be a loose fit. (2) The little bridge fixed by 2 small screws should have less pieces and be less liable to come loose or be damaged by over tightening. Conditions are now changed:- One way. Here a nut and flat spring washer. (Diagram 1: A spindle end with a nut and spring washer) Annotation for Diagram 1: Screwed or parallel & rivetted. Or (Diagram 2: A different spindle end design) Annotation for Diagram 2: Spring should not reach nut or have longer end. It is so extremely important that this throttle valve does not fail. (3) Square on throttle spindle might be more convenient than screw driver - see actual model. We are only interested in the closed position: the open one will take care of itself - i.e. on production. With the changes of the adjustable throttle lever it should be a very simple matter to get the proper clearance using a feeler gauge - (instruction book note.) R.{Sir Henry Royce} | ||