Intrusion alarm system

Details Intrusion alarm system Intrusion alarm system

1977-05-20

1979-04-17

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

With particular system function

340521, 340545, G08B 2900, G08B 1308

Patent

active

041503694

ABSTRACT:
An intrusion alarm system is described which includes multiple-input intruder sensing circuits, the outputs of which are fed via separate logic NAND circuits, to bistable latch circuits which then supply signals to an alarm latch circuit. One of the bistable latch circuits is coupled to the alarm latch via an entry delay timer, and all latches incorporate noise suppression circuitry. The intrusion system has a remote arming and resetting circuit which provides automatic testing of on-board status monitor lamps. This intrusion system is interconnected to an adjust fire/emergency sensing and control unit.

REFERENCES:
patent: 3540043 (1970-11-01), Crosthwait
patent: 3564139 (1971-02-01), Bodenstein et al.
patent: 3603973 (1971-09-01), Hough
patent: 3731294 (1973-05-01), Vass
patent: 3990075 (1976-11-01), Schmitz et al.

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