Event detection apparatus

Details Event detection apparatus Event detection apparatus

1983-08-16

1985-07-09

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340500, 340507, 340529, G08B 2300

Patent

active

045285535

ABSTRACT:
Circuitry for qualifying a series of randomly occurring alarm events to avoid erroneous indications. Alarm events occurring in a surveillance system or the like are counted over a selected time interval, and final alarm output is effected only if a selected 1+n number of events has been counted within the interval. Both the repetitive time intervals and the event number are variable in accordance with the exigencies of the alarm application.

REFERENCES:
patent: 3831039 (1974-08-01), Henschel
patent: 3979740 (1976-09-01), Forbat et al.
patent: 4086574 (1978-04-01), Miyabe

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