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 Co. Ltd. recording apparatus with various controls and a measurement scale.
| Identifier | ExFiles\Box 138\2\ scan0065 | |
| Date | 19th January 1937 guessed | |
| Fig 4 CAMBRIDGE INSTRUMENT Co. LTD. LONDON AND CAMBRIDGE BRITISH PATENT No 191580 BATTERY 6 VOLTS SIGNAL START • STOP SPEED PULL INCHES 0 1 2 CENTIMETRES 0 1 2 3 4 5 | ||