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).
Wiring diagram illustrating the connections of auto-switch units.
| Identifier | WestWitteringFiles\R\2December1927-February1928\ Scan166 | |
| Date | 4th February 1928 | |
| [ "TO DYNAMO", "TERMINAL. C.", "TO EARTH", "FROM", "DIS: BOX", "TERMINAL C", "FROM", "DIS. BOX", "TERMINAL B.", "RESIS. WINDING", "SHUNT WINDING", "N", "CONNECTIONS", "OF", "R.R. AUTO-SWITCH UNITS.", "F.J.A" ], | ||