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 an arrangement to produce a 12-volt auto charge control switch and modify a U.S.A. switch.
| Identifier | ExFiles\Box 59\1\ Scan309 | |
| Date | 5th April 1928 | |
| To RHC.{R. H. Coverley - Production Engineer} from EFC. X4008 EFC3/T5.4.28. This will confirm that we have arranged with you to produce at your early convenience one complete R.R. auto charge control switch with the finally approved 12 volt windings. We have also now handed back to you the U.S.A. switch of this type and you will shortly receive revised instructions for the temperature compensated windings of this instrument. As Springfield are asking for this quickly, this modification should be made at the earliest moment. EFC. | ||