Multiple sensor interconnected alarm system responsive to differ

Details Multiple sensor interconnected alarm system responsive to differ Multiple sensor interconnected alarm system responsive to differ

1981-01-14

1983-08-30

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

With particular system function

340508, 340541, 340554, 367 94, G08B 1316, G08B 1318

Patent

active

044019769

ABSTRACT:
An alarm, safeguarding and monitoring system for a room zone includes a plurality of sensors disposed at different positions and responsive to different physical phenomena, such as an ultrasonic sensor, an infrared sensor and a microwave sensor. The sensor outputs are individually coupled to majority decision, central processing unit and alarm generator circuits by a plurality of redundant signal links to minimize malfunction in the event of disruption or tampering.

REFERENCES:
patent: 3541539 (1970-11-01), Trumble
patent: 3725888 (1973-04-01), Solomon
patent: 3801978 (1974-04-01), Gershberg et al.
patent: 3846778 (1974-11-01), Galvin et al.

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