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).
Photograph of a Cambridge Instrument Company recording instrument.
| Identifier | ExFiles\Box 138\2\ scan0067 | |
| Date | 19th January 1937 guessed | |
| Fig 2 British Patent Nº195116 C 207268 CAMBRIDGE INSTRUMENT Co. LTD. LONDON AND CAMBRIDGE INCH M/M PULL SPEED START STOP | ||