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).
The principle of a practical arrangement for a speedometer and mileometer.
| Identifier | WestWitteringFiles\U\May1930-July1930\ Scan040 | |
| Date | 23th May 1930 guessed | |
| AEC2/AD20.B.30 contd. -3- There appears no reason in principle why a practical arrangement of speedometer and mileometer should not consist of an alternator whose rotating element is either a permanent magnet or an inductor, the fixed windings being permanently connected to a pair of line wires which supply a rectifier type instrument for speed indication, and a small synchronous motor driving a counter for mile indication. APC. | ||