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).
Confirming the agreed figures for gaps on the EAC push button switch and the decision to lengthen a carbon.
| Identifier | ExFiles\Box 64\3\ scan0263 | |
| Date | 1st January 1925 | |
| EFC. X.7650 -.1.25 It has been confirmed with BY/RD that the figures for the various gaps on the EAC . push button switch, given in EFC1/T16.1.25, were agreed to by him, and, as a result of that memo, it was decided to lengthen one of the carbons. Apparently the job was left at that point on account of the duplex switch being introduced, so that the above figures still stand. EFC/CAP. | ||