Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1990-07-10
1992-06-02
Corsland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular system function
340514, 340555, 250342, 358110, 358113, 359110, G08B 2900
Patent
active
051190699
ABSTRACT:
An audio indicator apparatus for locating boundaries of optically divided detection zones covered by a passive infrared detection system having a collector for collecting infrared rays from the zones of an area to be monitored, and a detector for passively detecting infrared rays collected by the collector and for generating a first signal having an amplitude responsive to the rays collected by the collector, which includes a signal generator to be connected to a speaker for producing a second signal responsive to the first signal, the second signal being indicative of activity of the detection system at a point, within the area to be monitored, where an infrared radiation emitting object is moved, to locate the boundaries of the zones.
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patent: 4612442 (1986-09-01), Toshimichi
patent: 4642454 (1987-02-01), Carlson
OPTEX, Inc., "Wireless Sensor-Annunciator System", Dec. 1988.
Hershkovitz Shmuel
Shpater Pinhas
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