Smoke detector having an integral piezo-electric buzzer

Details Smoke detector having an integral piezo-electric buzzer Smoke detector having an integral piezo-electric buzzer

1980-06-23

1981-12-15

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

340630, 340384E, G08B 1710

Patent

active

043062296

ABSTRACT:
A fire detector comprises a piezo-electric element attached to a vibrating portion which is part of a component constituting the detector. The component having the vibrating function may be a casing or an electrode or any other suitable member. The piezo-electric buzzer is thus incorporated in the detector to form a simple and compact fire detector with an alarm device.

REFERENCES:
patent: 2048630 (1936-07-01), Davis
patent: 2786195 (1957-03-01), Colette
patent: 2804609 (1957-08-01), Sussman
patent: 3681603 (1972-08-01), Scheidweiler et al.
patent: 3686655 (1972-08-01), Kasahara
patent: 3708675 (1973-01-01), Tashiro et al.
patent: 3879726 (1975-04-01), Sweany
patent: 3895367 (1975-07-01), Visser
patent: 3909815 (1975-09-01), Gacogne
patent: 3919702 (1975-11-01), Hayes et al.
patent: 3922655 (1975-11-01), Lecuyer

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