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Multi-signature fire detector

  • US 5,691,703 A
  • Filed: 06/07/1995
  • Issued: 11/25/1997
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Term
First Claim
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1. A multi-signature fire detection apparatus, comprising:

  • first detector means for detecting a first type of fire signature, said first detector means outputting a first signal indicative of a first detected fire signal;

    second detector means for detecting a second type of fire signature, said second detector means outputting a second signal indicative of a second detected fire signature;

    signal processing means for combining said first and second signals, wherein outputs of said first and second detector means are coupled to said signal processing means, said signal processing means comparing said first and second signals to a first predetermined reference value, and outputting a fire condition signal if a combination of said first and second signals exceeds said first predetermined reference value, wherein said first detector means detects a particulate size distribution indicative of a potential fire condition, and said second detector means detects gases indicative of the potential fire condition.

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