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).
Two diagrams illustrating the principle of a rotating armature within a magnetic field.
| Identifier | ExFiles\Box 4\5\ 05-page069 | |
| Date | 12th August 1936 | |
| R.R. DEA. 1207/TCH/R.{Sir Henry Royce} 136. 12-8-36. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} -1a- N S FIG 1 + FIG 2 | ||