Communications – electrical: acoustic wave systems and devices – Transmitter systems – Animal control
Patent
1992-01-07
1993-05-04
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Transmitter systems
Animal control
H04B 1100
Patent
active
052087875
ABSTRACT:
A sound wave generator is effective for producing ultrasonic sound wave vibrations as well as low frequency vibrations which are offensive to rodents. A wiring conductor which serves as a sonic radiator is attached to an end portion of a solenoid rod which is reciprocated by a coil which is energized by alternating current power. The solenoid rod is permitted to vibrate within a hollow spool, and the sonic radiator is mechanically coupled to the solenoid rod by a high compliance, conductive metal spring. Ultrasonic sound waves are produced by forming the solenoid rod of a ferromagnetic material which is characterized by magnetostriction in the presence of an alternating magnetic field. The amplitude of sound wave vibration is intensified by selecting the length and diameter of the solenoid rod so that its natural frequency of vibration is in harmony with either the pulse frequency of the electromagnetic driving force, or alternatively, the frequency of ultrasonic sounds produced by magnetostriction. The sound wave generator circuit includes a pseudo-random signal generator for randomly gating the conduction of electrical alternating current through the solenoid coils during a pulsing duty cycle.
REFERENCES:
patent: 2572313 (1951-10-01), Burns, Jr.
patent: 4097838 (1978-06-01), Fiala
patent: 4409553 (1983-10-01), Slough et al.
patent: 4414653 (1983-11-01), Pettinger
patent: 4802057 (1989-01-01), Patterson et al.
Griggs Dennis T.
Lobo Ian J.
LandOfFree
Rodent control by sound waves does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rodent control by sound waves, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rodent control by sound waves will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1979951