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).
Block diagram of a suggested non-earthed electrical circuit.
| Identifier | ExFiles\Box 180\M2\M2.3\ img007 | |
| Date | 12th February 1926 | |
| [ "Various circuits", "Non-earthed", "Lights.", "Suggested Smith Switch-box and Ammeter.", "Junction Box.", "Smith cut-out", "Smith Dynamo.", ".Battery.", "Motor", "M/DT 1100 J.J/KAY 12-2-26" ], | ||