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Interconnection of alarms of smoke detectors with distinguishable alarms

  • US 4,282,519 A
  • Filed: 10/06/1977
  • Issued: 08/04/1981
  • Est. Priority Date: 10/06/1977
  • Status: Expired due to Term
First Claim
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1. In a circuit of an abnormal condition detector alarm device adapted to be connected to other such devices to provide an interconnection of annunciator operation, each of the devices comprisingcondition responsive means having an output upon the presence of an abnormal condition,first annunciator means connected to said condition responsive means output to provide a steady type of energization of said annunciator means upon the presence of said output,switch means controlled by said condition responsive means output for controlling the supply of power from a source of power,first circuit means connected to said switch means and to said source of power when said switch means is operated to provide a second output,second circuit means connecting said second output to said first annunciator means to provide an intermittent type of energization of said annunciator means, andthird circuit means adapted to connect said second output to a second circuit means of a second annunciator means of a remote second condition detector alarm device to provide an intermittent type of energization of said second annunciator means and upon an operation of a switch means of said remote second condition detector alarm device, a second output of said second device is adapted to provide said intermittent type of energization of said first annunciator means.

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