Combination type fire detector

Details Combination type fire detector Combination type fire detector

1981-07-14

1983-04-26

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340521, 340589, 340598, G08B 1704, G08B 1706

Patent

active

043815030

ABSTRACT:
By the employment of the heat-sensitive thyristor, the conventional rate-of-rise action fire detector having a diaphragm deformable by thermally expanding air in a restrictively vented air chamber is easily converted to a combination type fire detector with minimal redesigning or additional fabrication and with an efficient mounting of the thyristor on a metal casing defining the air chamber.

REFERENCES:
patent: 3255441 (1966-06-01), Goodwin et al.
patent: 3717860 (1973-02-01), Tipton et al.
patent: 4072933 (1978-02-01), Pun
"Temperature, Not Current Switches P-N-P Element", Electronic Design 2, Jan. 18, 1977, p. 32.

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