Event detection and indication system

Details Event detection and indication system Event detection and indication system

1982-09-07

1984-03-06

Crosland, Donnie Lee

Communications: electrical

Condition responsive indicating system

With particular coupling link

340506, 340508, 340512, 340537, 34082505, 34082506, G08B 108, H04Q 700

Patent

active

044357001

ABSTRACT:
The detection of events such as illegal entry detection, or the occurrence of predetermined hazards are detectable by a system including a circuit loop 2 which incorporates event actuatable switches 1, 35, 37, 38. Each switch has associated therewith means (9, 36, 37a, 39) for both maintaining electrical continuity in the loop, following operation of the associated switch and for producing an electrical condition in the loop which is indicative of switch operation. A control circuit 7 is arranged to respond according to the condition produced and produce an alarm characteristic of the condition.

REFERENCES:
patent: 3644927 (1972-02-01), Green
patent: 3686531 (1972-08-01), Decker et al.
patent: 3702474 (1972-11-01), Fink et al.
patent: 3821733 (1974-06-01), Reiss et al.
patent: 3924256 (1975-12-01), Cohen
patent: 4118700 (1978-10-01), Lenihan

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