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Energy efficient alarm system and regulative central control unit

  • US 5,144,283 A
  • Filed: 06/18/1990
  • Issued: 09/01/1992
  • Est. Priority Date: 06/18/1990
  • Status: Expired due to Fees
First Claim
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1. An alarm system operated under a low rate of power consumption and regulated by a central control unit equipped to monitor multiple sensory devices operatively associated therewith and to regulatively trigger an alarm signal in response to sensing signals detected by said sensing devices, said system comprising:

  • A) sensing means for detecting and emitting a sensing signal in response to an environmental disturbance;

    B) a central control unit for receiving and monitoring the sensing signal which unit includes;

    1) first circuit means for generating a first control signal in response to sensing means;

    2) alarm detection means for outputting an alarm detection signal in response to said first control signal;

    3) means for outputting an alarm triggering signal in response to said alarm detection signal; and

    4) second circuit means responsive to said alarm triggering signal for generating an alarming signal; and

    C) a source of D.C. power for powering said control unit;

    with said means for generating a first control signal comprising a normally off mosfet, said mosfet having a gate, a source, and a drain, said mosfet having its gate connected to said source of D.C. power and its drain connected to said alarm detection means, at least one intrusion sensing device having a normally closed switch connected to the gate of said mosfet, at least one intrusion sensing device having a normally open switch connected to the drain of said mosfet, whereby said first control signal will be generated in response to an intrusion detected by any of said intrusion sensing devices.

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