High output smoke and heat detector alarm system utilizing a pie

Details High output smoke and heat detector alarm system utilizing a pie High output smoke and heat detector alarm system utilizing a pie

1978-07-03

1981-05-19

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

250381, 340636, G08B 1710

Patent

active

RE0306207

ABSTRACT:
A high output smoke and heat detector alarm system comprises a high output audible alarm means which includes a piezoelectric transducer and a voltage doubling means in combination with an improved smoke and heat detector which includes a low voltage power supply source, an ambient temperature detecting means, at least one ionization sensing chamber, a voltage amplitude comparing means, and a low voltage sensing means.

REFERENCES:
patent: 3774186 (1973-11-01), Enemark
patent: 3805259 (1974-04-01), Inoue
patent: 3811123 (1974-05-01), Hamm et al.
patent: 3812362 (1974-05-01), Larsen et al.
patent: 3821734 (1974-06-01), Meier et al.
patent: 3895367 (1975-07-01), Visser
patent: 3909813 (1975-09-01), Scheidweiler et al.
patent: 3934145 (1976-01-01), Dobrzanski et al.
"FET Increases Schmitt Trigger Input Impedance" by L. R. Lott, Electronics, Jul. 26, 1965, p. 65.

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