Smoke detection apparatus

Details Smoke detection apparatus Smoke detection apparatus

1984-07-02

1986-08-26

Levy, Stewart J.

Communications: electrical

Condition responsive indicating system

Specific condition

340522, 340590, 340630, 116106, 137 74, 7386301, G08B 1900

Patent

active

046085564

ABSTRACT:
A heat sensitive air/gas sampling device including an apertured housing for connection to a pipe leading to a smoke detector device the housing including a blocking device for preventing air/gas to enter the housing, the blocking device being ineffective to prevent ingress of air/gas when the surrounding temperature exceeds a predetermined maximum for a predetermined period of time. The blocking device may be held by, or composed of, a low melting point wax. The blocking device may be comprised of a bimetallic strip.

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