×

Fire detection alarm system

  • US 4,737,769 A
  • Filed: 01/03/1986
  • Issued: 04/12/1988
  • Est. Priority Date: 03/12/1985
  • Status: Expired due to Fees
First Claim
Patent Images

1. An alarm system utilizing the existing electrical wiring provided in the structure and wall mounted electrical receptacles and wall-mounted switchplates connected to said wiring, each of said wall-mounted electrical receptacles and switchplates provided in a protective area, comprising:

  • at least one alarm signal generating means connected to said receptacles or switchplates for producing an alarm signal;

    a plurality of first conversion means connected between said alarm signal generating means and said electrical wiring for converting the signal produced by said alarm signal generating means to an encoded RF signal and conducting said signal over said existing electrical wiring, each of said first conversion means provided with an encoder for producing an encoded signal different than the signal produced by at least one other first conversion means;

    second conversion means connected to each of said first conversion means by said electrical wiring for converting the respective encoded RF signal produced by each of said first conversion means and transmitted over the existing wiring to said second conversion means to an electrical or electronic signal;

    a panel box provided with a plurality of circuit protective devices therein, said panel box connected to said electrical wiring downstream from each of said first conversion means; and

    a central monitor provided at a location remote from said panel box for displaying the location of each of said alarm signal generating means, said central monitor visually displaying the location of each of said produced alarm signal based upon the signals generated by said conversion means.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×