Fire detector

Details Fire detector Fire detector

1997-05-23

1999-11-16

Lefkowitz, Edward

Communications: electrical

Condition responsive indicating system

Specific condition

340628, 250574, G08B 1710

Patent

active

059865563

ABSTRACT:
A fire detector capable of readily and accurately adjusting the sensitivity there of and of not erroneously outputting any fire signal is provided with a first-stage amplifying circuit having an output adjusting variable resistor and a fire discriminating section having a reference voltage adjusting variable resistor. As a result, it is possible to adjust the amplified output to a predetermined value by the switching level of the fire discriminating section to a predetermined value by the reference voltage adjusting variable resistor.

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patent: 5705988 (1998-01-01), McMaster

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