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Fire alarm system

  • US 4,816,808 A
  • Filed: 07/07/1987
  • Issued: 03/28/1989
  • Est. Priority Date: 04/23/1986
  • Status: Expired due to Term
First Claim
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1. A fire alarm system wherein a receiver polls terminal devices each have a CPU, said terminal devices including at least one of fire directors, fire sensors and repeaters, and wherein said receiver reads monitoring information called from said terminal devices or transmits control information thereto;

  • wherein each of said respective terminal devices include;

    a transmission signal-receiving means for receiving signals from said receiver;

    a determining means for determining whether or not a polling address received by said transmission signal-receiving means coincides with a self-address of the terminal device; and

    a waiting state set means for setting the CPU in the terminal device to a waiting state when a non-coincidence between said polling address and said self address is determined by said determining means.

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