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).
List of different types of auto charge control switch units, with remarks and locations.
| Identifier | ExFiles\Box 59\1\ Scan328 | |
| Date | 9th July 1928 | |
| X.4008 9.7.28. LIST of AUTO CHARGE CONTROL SWITCH UNITS. Auto charge control switches:- Unit. Iron or brass winding cheeks. Remarks. Location. Dist. board type. { A I Three terminal. Permt connection to base. Extra winding. Lab. { B I Rewound with finally approved temp. compensating windings.(Eureka) 8-EX. { C. B Four terminal type. Lab. Separate Unit type. { D.{John DeLooze - Company Secretary} I Four terminal type. Not up-to-date. Lab. { F.{Mr Friese} B Four terminal type. Not temperature compensated. Lab. EFC. | ||