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 diagram for a combined auto-switch and cut-out unit.
| Identifier | ExFiles\Box 59\1\ Scan182 | |
| Date | 14th November 1927 | |
| X4008 File To Dynamo Terminal C From Dis. Box. Terminal C CUT OUT UNIT Contacts Res. Shunt Moving Fixed Contacts Shunt Series To Dynamo Terminal A Earth COMBINED AUTO-SWITCH AND CUT-OUT UNIT E7C 14/11/27 | ||