High output audible alarm device utilizing a piezoelectric trans

Details High output audible alarm device utilizing a piezoelectric trans High output audible alarm device utilizing a piezoelectric trans

1976-10-15

1978-08-01

Pitts, Harold I.

Communications: electrical

Audible indication

Ultrasonic pest control

340384R, G08B 300

Patent

active

041046285

ABSTRACT:
A piezoelectric transducer and a voltage doubling means are utilized in conjunction with a power supply means, a pulsator means, an amplifier means, and an acoustical loading means to produce an efficient high output audible alarm device. The voltage doubling means and the acoustical loading means enhance the audible output of the alarm device while increasing the overall electroacoustical efficiency of the alarm.

REFERENCES:
patent: 3138795 (1964-06-01), Wallace
patent: 3284796 (1966-11-01), Borsattino
patent: 3541548 (1970-11-01), Cogar
patent: 3559158 (1971-06-01), Bettcher
patent: 3890612 (1975-06-01), Sweany
patent: 3893107 (1975-07-01), Schedler
patent: 3922672 (1975-11-01), Birt
patent: 4018131 (1977-04-01), Cannon

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