×

Multi-function combustion detecting device

  • US 4,302,753 A
  • Filed: 01/26/1978
  • Issued: 11/24/1981
  • Est. Priority Date: 01/26/1978
  • Status: Expired due to Term
First Claim
Patent Images

1. An improved warning device, comprising means for detecting the occurrence of predetermined phenomena;

  • means for interconnecting said device with at least one other warning device which generates an interconnect signal when the other warning device detects said predetermined phenomena, and indicator means for generating a first sensibly discernible signal in response to said detecting means detecting said phenomena, a second sensibly discernible signal in response to the occurrence of the interconnect signal, a third sensibly discernible signal whenever neither of said first and second signals is being generated and means for monitoring the sensitivity of said detector means to said phenomena, said indicator means generating a fourth sensibly discernable signal in response to said sensitivity decreasing to at least a selected level, said indicator means generating said third sensibly discernable signal whenever none of said first, second and fourth signals is being generated.

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