Carrier current communications system

Details Carrier current communications system Carrier current communications system

1978-12-26

1980-12-16

Robinson, Thomas A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340310R, 370 71, H04M 1100, H04H 108

Patent

active

042399408

ABSTRACT:
A plurality of transmitters and receivers arranged for carrier current communications are generally placed throughout a large building. The transmitters and receivers are coupled to selected portions of the power distribution system. The selected portions are stairwell exit and lighting risers emanating from the same location of contiguous circuit breakers. Coupling circuits are applied to both remote transceivers and the central station transceivers.

REFERENCES:
patent: 1945629 (1934-02-01), Duncan, Jr.
patent: 2023857 (1935-12-01), Satterlee et al.
patent: 2179612 (1939-11-01), Butler
patent: 2389257 (1945-11-01), Halstead
patent: 3949172 (1976-04-01), Brown et al.
patent: 4012733 (1977-03-01), Whyte
patent: 4020289 (1977-04-01), Anderson
patent: 4139735 (1979-02-01), Dorfman et al.
patent: 4142178 (1979-02-01), Whyte et al.

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