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 Liberty Dynamo & Regulator and a Westinghouse Dynamo & Regulator.
| Identifier | WestWitteringFiles\J\November1922\ Scan76 | |
| Date | 14th November 1922 guessed | |
| No. 5. LIBERTY DYNAMO & REGULATOR. 46w 118w 41w LOAD No. 6. WESTINGHOUSE DYNAMO & REGULATOR. LOAD | ||