Gas leak-detecting apparatus

Details Gas leak-detecting apparatus Gas leak-detecting apparatus

1977-10-05

1979-10-09

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

340605, G08B 1710

Patent

active

041707702

ABSTRACT:
A gas leak-detecting apparatus which comprises an alarm circuit; a gas-detecting circuit electrically separated from the alarm circuit and provided with a gas-sensitive element prepared from an oxide semiconductor; and a contactless coupling circuit for operating the alarm circuit by an output from the gas-detecting circuit.

REFERENCES:
patent: 3403315 (1968-09-01), Maynard
patent: 3407840 (1968-10-01), Finnegan
patent: 3588892 (1971-06-01), Scheidweiler
patent: 3602251 (1971-08-01), Hill
patent: 3801974 (1974-04-01), Aitken
patent: 3887908 (1975-06-01), Swigert

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