G - Physics – 08 – B
Patent
G - Physics
08
B
G08B 3/10 (2006.01) A01M 29/02 (2006.01)
Patent
CA 2099792
An electronic alarm is disclosed for use in a moving vehicle which generates ultrasonic sound for preventing animals from moving into the path of the vehicle. The device includes a simplified driver circuit for generating electrical impulses in the form of square waves having constant peak-to-peak voltages. The driver generates the square waves with periodic, sequentially increasing wave frequencies followed by sequen- tially decreasing wave frequencies. A coupling transformer converts the square waves into electrical sine wave voltages having high peak-to-peak voltages to cause a piezo-electric transducer to emit intense, ultrasonic sounds of periodically increasing frequencies followed by periodically decreasing frequencies simulating the warble effect of a siren without excessive heating and premature failure of the transducer. The ultrasonic warble effect confuses the animal to prevent inad- vertent movement by the animal into the oncoming vehicle's path without injury to the animal.
Carlo Louis D.
Garner Jon E.
Shives Michael J.
Gowling Lafleur Henderson Llp
Winner International Royalty Corporation
LandOfFree
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