Multiple zone intrusion alarm system

Details Multiple zone intrusion alarm system Multiple zone intrusion alarm system

1974-06-11

1976-03-23

Trafton, David L.

Communications: electrical

Systems

Call station

340 16R, 340258A, G08B 1316

Patent

active

039463761

ABSTRACT:
An intrusion alarm system for a plurality of protected zones and operative to provide an indication of a particular zone in which intrusion has occurred. Relatively low performance, low cost signal processing circuitry is provided for each protected zone, with a single high performance processor provided for an entire system. The lower performance circuitry provides respective signals indicative of an alarm condition in corresponding zones, the high performance processor being operative to confirm the presence of an actual intruder and only upon such confirmation to cause an output alarm indication.

REFERENCES:
patent: 3680074 (1972-07-01), Lieser
patent: 3774190 (1973-11-01), Kyle
patent: 3781859 (1973-12-01), Hermans
patent: 3831162 (1974-08-01), Armstrong

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