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).
Hand-drawn schematic diagram of a dynamo or motor showing poles, armature, and wiring.
| Identifier | ExFiles\Box 3\5\ 05-page094 | |
| Date | 20th April 1937 | |
| U.K. 23/a (200 T) (S.D. 400. 20-4-37.) Pro. 5236/11. 1a N A+ C M+ M+7-C S A- C R M- M+7-C | ||