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).
New, lower-rated spring design for an Autovac tank valve, including material options.
| Identifier | WestWitteringFiles\I\June1922\ Scan121 | |
| Date | 30th June 1922 | |
| He 1 JUL 1922 RECEIVED To Hy.{Tom Haldenby - Plant Engineer} from Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork} Da{Bernard Day - Chassis Design}/Ev{Ivan Evernden - coachwork}2/M30.6.22. c. to GJ. c. to Wor.{Arthur Wormald - General Works Manager} c. to Hs.{Lord Ernest Hives - Chair} ✓ RE. AUTOVAC TANK VALVE. X3579 Further to Mr. Royce's remarks in his R1/M13.6.22., we send herewith N.sch. 1307 shewing a design of spring to give much less load on the valve seat, and with a considerably reduced rating. We wish to have a good big drop of the knob when the valve closes, so that the operator will know when he has got the valve held open or closed. The spring shewn is in Silicon Bronze, but if necessary a similar spring of thinner gauge and more coils, and hence less rate, could be made of steel wire electroplated. Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork} | ||