The Record Electrical Co. Ltd.
The firm displayed a working model of a portion of a town lighting system
to demonstrate the Record Remote Operated Selective Switching Units.
Two different systems were shown: (a) selectivity through a pilot wire and
(b) selectivity by interruption of the main circuit. Both seems could
be operated from a central point, either manually or by time-switch. Eight
combinations of signal were available. - APLE Conference Programme Glasgow 1945
APLE Conference Programme Glasgow 1945
- External Links:
- Grace's Guide