Combustible gas detector having temperature stabilization capabi

Details Combustible gas detector having temperature stabilization capabi Combustible gas detector having temperature stabilization capabi

1987-11-03

1989-04-04

Orsino, Jr., Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

73 27R, 324 65R, G08B 1710

Patent

active

048189774

ABSTRACT:
A catalytic gas detector circuit in which the temperature of a resistance gas sensing element, contained in a bridge circuit, is reduced and therefore stabilized by energizing a transistor to draw off current from the sensing element when the sensing element is exposed to high concentrations of combustible hydrocarbon gases.

REFERENCES:
patent: 3997837 (1976-12-01), Betz et al.
patent: 4028057 (1977-06-01), Nelson
patent: 4080821 (1978-03-01), Johnson
patent: 4164699 (1979-08-01), Timoshenko et al.
patent: 4305724 (1981-12-01), Micko
patent: 4533520 (1985-08-01), Bossart et al.

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