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).
Circuit diagrams for a dynamo charging and lighting system.
| Identifier | ExFiles\Box 3\5\ 05-page008 | |
| Date | 1st October 1911 guessed | |
| Fig. III, BATTERY, AUTOMATIC, CUT OUT, LAMPS, FIG. I, A, B, S, S', R, p, V, O, + LINE, - LINE | ||