Multizone intrusion alarm system

Details Multizone intrusion alarm system Multizone intrusion alarm system

1974-06-12

1976-02-10

Trafton, David L.

Communications: electrical

Systems

Call station

340 16R, 340258A, G08B 1324, G08B 1316

Patent

active

039381188

ABSTRACT:
An intrusion alarm system for use with a plurality of protected zones and providing an output indication of a particular zone or zones in which intrusion has occurred. A lesser number of signal processors are employed than the number of zones being protected. Signals received from each protected zone are selectively combined to provide different summed signals which are applied to respective processors that are shared by the zones and the output signals of which are processed by logic circuitry to provide an output indication of the presence of an intruder and an indication of the zone in which intrusion has occurred.

REFERENCES:
patent: 3264613 (1966-08-01), Stolle
patent: 3626365 (1971-12-01), Press et al.
patent: 3680074 (1972-07-01), Lieser
patent: 3747057 (1973-07-01), Brougher
patent: 3781859 (1973-12-01), Hermans

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