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Smoke detector with automatic dialing

  • US 5,365,568 A
  • Filed: 07/06/1993
  • Issued: 11/15/1994
  • Est. Priority Date: 11/04/1991
  • Status: Expired due to Fees
First Claim
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1. A system for detecting one or more of a plurality of alarm conditions, at a monitored location, by respective alarm detectors, and for reporting the detected alarm conditions to one or more respective monitoring stations, comprising:

  • telephone line means for effecting communications between said monitored location and one or more of said monitoring stations;

    an alarm sensor having a plurality of inputs, said alarm detectors being connected to respective ones of said inputs of said alarm sensor;

    said alarm sensor including a data output terminal (SDA) and a clock output terminal (SCL);

    a modem having a plurality of input terminals and a plurality of output terminals;

    a microprocessor having a plurality of input terminals and a plurality of output terminals;

    a battery;

    power shut-down means connected between said battery and said modem and said microprocessor, said power shut-down means being normally turned on whereby power from said battery is not supplied to said modem and to said microprocessor;

    trigger circuit means connected between said sensor and said power shut-down means;

    said trigger circuit means being activated by said alarm sensor on receipt of an alarm condition signal whereby to turn off said power shut-down means;

    whereby, power is supplied to said modem and to said microprocessor on receipt of an alarm condition by said alarm sensor;

    means for seizing said telephone line means on receipt of an alarm condition by said alarm sensor.

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