Ultra-sonic pest control apparatus

Details Ultra-sonic pest control apparatus Ultra-sonic pest control apparatus

1980-06-25

1982-08-24

Caldwell, Sr., John W.

Communications: electrical

Audible indication

Ultrasonic pest control

340384R, G08B 310, A01M 2900

Patent

active

043463703

ABSTRACT:
An ultra-sonic pest control apparatus includes a tone generator for generating an output frequency as a function of applied voltage, a transducer electrically connected to the output of the tone generator for delivering ultra-sonic sound, and a generator for generating a periodically repeating sawtooth waveform. A gating oscillator connected to the tone generator and generator emits a frequency sweep responsive to each sawtooth pattern of the sawtooth waveforms and uniformly chops a portion of each frequency sweep and passes the chopped frequency sweeps at predetermined, uniform, timed intervals to the transducer.

REFERENCES:
patent: 3058103 (1962-10-01), Evans
patent: 3138138 (1964-06-01), Quittner
patent: 3503039 (1970-03-01), Aniskovicz
patent: 3636559 (1972-01-01), Del Grande et al.
patent: 3838418 (1974-09-01), Brown
patent: 3872472 (1975-03-01), Moschgat
patent: 3873960 (1975-03-01), Gates, Sr.
patent: 3879702 (1975-04-01), Mancone
patent: 3886492 (1975-05-01), White
patent: 3891962 (1975-06-01), White
patent: 4178578 (1979-12-01), Hall
patent: 4186387 (1977-10-01), Moschgat

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