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).
List of patents, including their number, patentee, and title.
| Identifier | ExFiles\Box 147\3\ scan0012 | |
| Date | 2nd December 1937 guessed | |
| 38 No. Name of Patentee. Title. Swarf and other super- fluous matter from Gear Wheels and other like Articles. 474,420 The Pulsometer Engineer- ing Company Limited and Reginald Warren. Improvements in or relating to Clutch Operation. 474,431 Mechanical and General Inventions Co. Ltd. Improvements in and relating to Change Speed Gear. ----------------- | ||