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).
Letter proposing a device for indicating ignition faults using safety spark gaps.
| Identifier | ExFiles\Box 33\1\ Scan038 | |
| Date | 13th October 1920 | |
| x.1775- 14. Perham Rd. West Kensington W. 14 October 13th 1920. The Chief Engineer Rolls Royce Mlin Co. Rugby. Dear Sir, I have a device for indicating faults on ignition which I hope will be of interest to your firm. It is merely a number of safety spark gaps connected to various parts of the ignition | ||