Diagram of the windings, poles, brushes, and terminals for a U.S.A. Bosch Dynamo.
| Identifier | WestWitteringFiles\E\November1920\ Scan65 | |
| Date | 4th November 1920 | |
| U.S.A. BOSCH. DYNAMO + F - N S C 15° Diagram of windings, poles, brushes terminals, etc., viewed from commutator end, and showing armature poles, due to main current. HA 27-X-20 E+C.C. 4.11.20 | ||
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).