Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1982-09-23
1985-02-05
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular system function
340505, 340524, 340517, 340331, 3403093, 34082517, 34082536, G08B 2500
Patent
active
044980752
ABSTRACT:
A fault indicator apparatus employs a single indicating device such as a light emitting diode (LED) to provide an indication of all zones within a plurality of zones which exhibit a predetermined condition being monitored. In particular, the invention is employed in a multi-zone intrusion system where a single indicator provides an output indicative of all zones which are not secure. The apparatus causes the indicator to blink the zone numbers in a continuous sequence and for example, if zones 2 and 5 were not secure the indicator would provide two flashes indicative of zone 2 and then provide a predetermined pause while then providing 5 flashes indicative of zone 5. The user by counting the flashes can then immediately determine which zones in the plurality of zones have been violated.
REFERENCES:
patent: 2980898 (1961-04-01), Mason et al.
patent: 3155950 (1964-11-01), Foster
patent: 3823383 (1974-07-01), Mallinger
patent: 3852718 (1974-12-01), De Lyria
patent: 3940739 (1976-02-01), Quimet
patent: 4223302 (1980-09-01), Hocking
Crosland Donnie L.
Napco Security Systems, Inc.
Plevy Arthur L.
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