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1. 发明授权

US3872472A Ultrasonic system for repelling noxious fauna 失效
标题翻译：用于回收臭氧的超声波系统
公开(公告)号：US3872472A
公开(公告)日：1975-03-18
申请号：US42375973
申请日：1973-12-11
申请人： MOSCHGAT ROBERT G
发明人： MOSCHGAT ROBERT G
IPC分类号： A01M29/18 , B06B1/02 , A01M29/00 , G10K10/00
CPC分类号： A01M29/18 , B06B1/0284 , B06B2201/75
摘要： An ultrasonic system for intermittently producing pulses of energy for permanently repelling rats and other noxious fauna. The system includes a voltage-controlled oscillator capable of generating an ultrasonic signal whose frequency lies within a range to which noxious fauna are highly sensitive. Means are provided to apply voltages intermittently to the oscillator to produce an output signal whose frequency depends on the applied voltage and to convey this signal for a brief period to one or more ultrasonic transducers arranged to irradiate an infested area, the applied voltages having random values whereby each radiated pulse of energy has a different frequency and rats exposed to the ultrasonic pulses are unable to acquire deaf immunity.
摘要翻译：一种用于间歇地产生能量永久排斥大鼠和其他有害动物的能量的超声波系统。该系统包括能够产生频率在有害动物群高度敏感的范围内的超声波信号的压控振荡器。提供用于间歇地向振荡器施加电压的装置以产生其频率取决于施加的电压的输出信号，并将该信号短暂地传送到布置成照射感染区域的一个或多个超声换能器，所施加的电压具有随机值由此每个辐射的能量脉冲具有不同的频率，暴露于超声波脉冲的大鼠不能获得聋的免疫力。

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