Central alarm conditioning detecting and alerting system

Details Central alarm conditioning detecting and alerting system Central alarm conditioning detecting and alerting system

1977-04-22

1979-02-20

Waring, Alvin H.

Communications: electrical

Condition responsive indicating system

340287, G08B 2900

Patent

active

041410076

ABSTRACT:
A central smoke detector alarm system, for a multiple floor, multiple dwelling apartment building, which utilizes the existing components of the fire alarm system found in such buildings. Individual alarm condition detectors, such as smoke detectors, are located in each dwelling on a floor and interconnected with each other. A relay box connects the individual units to an existing fire alarm box on that floor to activate the fire alarm system throughout the building should an alarm condition be detected. The relay box serves as a central power supply source for the individual units and contains circuitry to detect a fault in any of the lines interconnecting the individual detectors and the relay box. A time delay is included in the relay box to delay activation of the fire alarm bell a predetermined time period after an alarm condition is detected.

REFERENCES:
patent: 3441929 (1969-04-01), Coffer et al.
patent: 3665461 (1972-05-01), Gnagi et al.

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