Selective test circuit for fire detectors

Details Selective test circuit for fire detectors Selective test circuit for fire detectors

1982-04-14

1984-12-18

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340518, 324158F, G08B 2900

Patent

active

044893124

ABSTRACT:
A circuit for selectively or extractively testing a fire detector among a plurality of fire detectors which are connected between an alarming line extending from the section relay of a receiving unit and a common line is disclosed. An inherent address code is allotted to each fire detector. When an address signal transmitted through the alarming line coincides with the allotted inherent address code, a coincidence signal is produced and in response to said coincidence signal a test voltage is generated for each fire detector.

REFERENCES:
patent: 3566399 (1971-02-01), Weld
patent: 3717862 (1973-02-01), Sasaki
patent: 3848241 (1974-11-01), LeNay et al.
patent: 4224466 (1980-09-01), Bush et al.

Affiliated with

Also associated with

Rating

Selective test circuit for fire detectors does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Selective test circuit for fire detectors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Selective test circuit for fire detectors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1990714