Data communication system

Details Data communication system Data communication system

1988-11-29

1990-08-28

Orsino, Joseph A.

Communications: electrical

Systems

Selsyn type

340310A, 340310CP, 34082536, G08B 1300

Patent

active

049529056

ABSTRACT:
A communication system utilizing the electrical-supply wiring of mains circuit has an interface unit for an intruder-sensor. Unit has a transmitter for sending FSK-modulated messages and a capacitor to store adequate energy to power transmitter only for the time-duration of a message. The system also has a interface unit for a temperature sensor.

REFERENCES:
patent: 3697975 (1972-10-01), Bernstein et al.
patent: 3980996 (1976-09-01), Greenspan et al.
patent: 4268818 (1981-05-01), Davis et al.
patent: 4290056 (1981-09-01), Chow
patent: 4453162 (1984-06-01), Money et al.
patent: 4495649 (1985-01-01), Iwata
patent: 4613848 (1986-09-01), Watkins

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