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).
Page discussing the patentability of a main throttle valve feature for its safety value.
| Identifier | ExFiles\Box 50\3\ Scan256 | |
| Date | 27th December 1922 guessed | |
| contd:- -3- main throttle valve. We think this is a patentable feature as it is manifestly valuable for safety. R. {Sir Henry Royce} Watermark: MADE AT CROXLEY | ||