Fire box alarm

Details Fire box alarm Fire box alarm

1977-04-07

1978-05-02

Pitts, Harold I.

Communications: electrical

Systems

Signal box type

340299, 340304, G08B 2500

Patent

active

040878031

ABSTRACT:
A local alarm apparatus mounted on a conventional alarm box to provide an audible and visual alarm that a fire alarm is being sent so that passersby will take notice .of the sender in the event a false alarm is sent. The audible and visual alarm is connected in parallel with the main fire D.C. alarm circuit so that activation of the main circuit will activate the local alarm. The local alarm is coupled to and powered by an A.C. power supply located at a remote location and coupled to the conventional fire alarm transmission lines.

REFERENCES:
patent: 3531794 (1970-09-01), Goerner

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