×

Communication protocol for interconnected hazardous condition detectors, and system employing same

DC
  • US 6,791,453 B1
  • Filed: 08/11/2000
  • Issued: 09/14/2004
  • Est. Priority Date: 08/11/2000
  • Status: Expired due to Fees
First Claim
Patent Images

1. A distributed hazardous condition detection and alarm system, comprising:

  • a first hazardous condition detector;

    a second hazardous condition detector; and

    a 3-wire interconnect coupling said first detector to said second detector, and wherein at least one of said first and said second detectors is operable to generate a multi-pulse alarm message on the interconnect to indicate detection of carbon monoxide, and wherein at least one of said first and said second detectors is operable to generate a constant DC level on the interconnect to indicate detection of smoke.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×