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).
Letter to Mr. Hives describing a new spring-loaded ball valve lubricator system with a diagram.
| Identifier | ExFiles\Box 76\4\ scan0253 | |
| Date | 1st June 1920 | |
| TELEPHONE RIVER 8280 ROLLS-ROYCE OF AMERICA INC. 707 CITY REALTY BUILDING SPRINGFIELD MASS. Oy3 - G 1620 June 1st, 1920 To: Mr. Hives - 2 I have had a set fitted to my car and we have a set on the firm's Hupmobile, both of which work satisfactorily and are vastly preferable to the ordinary grease cup, because of accessibility. The principle of the lubricator is a little spring loaded ball valve screwed to the shackle bolt and depressed by the nozzle of the grease-gun thus:- [Handwritten annotations on diagram] Bayonet Joint Hose from grease gun Strong spring Cup leather seal Taper fit to prevent grease leaking Weaker spring The screw-down grease-gun forces grease into the bear- ings under as much as 450 lbs. pressure, as shown by gauge. | ||