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专利名称：Portable alarm device发明人：Klaus-Peter Kolbatz申请号：US07/544542申请日：19900628公开号：US05093650A公开日：19920303
摘要：A portable alarm device for monitoring areas against burglary includes an alarmand a power supply connected to the alarm by an alarm circuit. A reception sensor isconnected to a variable preamplifier for varying volumes of the alarm signal in
accordance with the size of the area being monitored. The preamplifier is connected to atleast one rejector circuit frequency filter for controlling the susceptible frequency rangeof the alarm trigger signals with a microprocessor connected to the rejector frequencyfilter to receive and transmit the signal. A signal converter is used to activate the powersupply. A push button time switch is connected to the signal converter in order to delaytime or readiness of the alarm for operation and the power supply is connected to thealarm through the signal converter by a closed circuit for delivering a constant low-intensity current with intermittent interruption by the signal converter.
申请人：KOLBATZ; KLAUS-PETER
代理机构：Millen, White & Zelano
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