Title :
Electronic facilities control
Author :
De Mattteis, J. J.
Author_Institution :
International Business Machine Corporation, New York, N. Y.
Abstract :
A central control system is described which follows preset programs and automatically switches on or off up to 40 groups of remote operations—each on its own time schedule. Utilizing carrier current signals, it operates over existing electric circuits and does not require the installation of any transmission wiring.
Keywords :
Decoding; Logic gates; Magnetic circuits; Receivers; Relays; Research and development;
Journal_Title :
Electrical Engineering
DOI :
10.1109/EE.1955.6439500
