Alarm system having improved false alarm rate and detection reli

Details Alarm system having improved false alarm rate and detection reli Alarm system having improved false alarm rate and detection reli

1978-01-06

1980-03-25

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

With particular system function

340522, 340587, G08B 2900

Patent

active

041952863

ABSTRACT:
An alarm system has two output modes, one providing relatively high detection probability and the other providing relatively low false alarm probability. Two or more sensors are coupled to an associated logic circuit which provides a first alarm output in response to actuation of any one of the sensors, and a second alarm output in response to actuation of the two or more sensors within a predetermined time interval.

REFERENCES:
patent: 3543261 (1970-11-01), Burney
patent: 3599195 (1971-08-01), Boyko
patent: 4090180 (1978-05-01), Barowitz et el.

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