Combustible gas detector having catalytic sensor stabilizing network
Patent
·
OSTI ID:5321730
This patent describes a catalytic gas detector circuit. It comprises: a bridge circuit having four branches and having input and output terminals wherein the input terminals are connected to a power source means and the output terminals are connected to a means to measure an imbalance in the bridge; the first branch is a catalytic gas sensing element that is reactive to combustible gases; the second brand is a compensating element; the third and fourth branches are resistors; a current changing means to temporarily increase a normal operating current of the circuit for a predetermined period of time sufficient to exceed the normal operating temperature of the catalytic gas sensing element off and remove inhibitors from the catalytic gas sensing element wherein the current means is connected between the bridge and the power source; and a timer means to activate the current changing means for the predetermined period of time.
- Assignee:
- Mine Safety Appliances Co., Pittsburgh, PA
- Patent Number(s):
- US 4854155
- Application Number:
- PPN: US 7259760A
- OSTI ID:
- 5321730
- Country of Publication:
- United States
- Language:
- English
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