Fire alarm system

Details Fire alarm system Fire alarm system

1991-11-22

1992-07-07

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular system function

340505, 340511, 340514, 340518, 340588, 34087021, 34082508, 364141, G08B 2900

Patent

active

051286530

ABSTRACT:
A fire alarm system in which an analog type sensor (3) is connected to a transmission line (2) from a receiver (1) and in which one or more on-off type sensor (7) located in the same monitor area (14, 15, 16) as that in which the analog type sensor (3) is provided is connected to a signal line (6) led out from the analog type sensor (3). The analog type sensor (3) is provided with a fire detection circuit (12) for detecting a fire signal from the on-off type sensor (7) and a transmission control circuit (11) for transmitting its own analog detection data and fire detection data from the fire detection circuit (12) to the receiver (1).

REFERENCES:
patent: 3964018 (1976-06-01), Strait et al.
patent: 4555695 (1985-11-01), Machida et al.
patent: 4727359 (1988-02-01), Yuchi et al.
patent: 4733224 (1988-03-01), Kimura
patent: 4785284 (1988-11-01), Kimura

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