Combustible gas detector

Details Combustible gas detector Combustible gas detector

1987-02-13

1988-10-18

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

73 27R, G08B 1710

Patent

active

047790784

ABSTRACT:
A combustible gas detector having a transformer, a gas detector, a buzzer, a capacitor connected in parallel with the buzzer, an electronic switch, and two resistors. The gas detector has a resistive element which varies in the presence of a combustible gas. The resistive element and one of the resistors form a voltage divider which produces a potential triggering the electronic switch to energize the buzzer upon the detection of a combustible gas. The capacitor modifies the wave form across the buzzer causing it to produce a unique cricket-like sound.

REFERENCES:
patent: 3276004 (1963-04-01), Mayo
patent: 4150370 (1979-04-01), Bradshaw
Figaro, Gas Sensors #711 & #812, Apr. 1975.
Motorola, Solid State Gas/Smoke Detector Systems, by Al Pshaenich .COPYRGT. 1974.

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