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False alarm resistant and fast responding fire detector

  • US 8,077,046 B1
  • Filed: 10/08/2010
  • Issued: 12/13/2011
  • Est. Priority Date: 10/08/2010
  • Status: Expired due to Fees
First Claim
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1. A fire detector, comprising:

  • a smoke detector;

    a carbon monoxide (“

    CO”

    ) detector; and

    a logic component for generating a fire alarm when any of the following criteria are met;

    (1) the smoke detector detects a threshold level of light obscuration for greater than a first pre-selected time period;

    (2) the smoke detector detects a reduced threshold level of light obscuration for greater than a second pre-selected time period;

    (3) a rate of increase in CO concentration detected by the CO detector exceeds a first preselected CO rate for a third pre-selected time period and the smoke detector detects the reduced threshold level of light obscuration;

    or(4) the rate of increase in CO concentration detected by the CO detector exceeds a second preselected CO rate for a fourth pre-selected time period.

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