Integrated fully supervised fire alarm system

Details Integrated fully supervised fire alarm system Integrated fully supervised fire alarm system

1973-04-05

1978-03-14

Trafton, David L.

Communications: electrical

Audible indication

Pneumatic-type sound producer

179 1MN, 179 25R, 324 51, 340227R, 340253B, 340253Q, G08B 2100

Patent

active

RE0295809

ABSTRACT:
A low voltage audio fire alarm system fully integrated in a paging and music speaker system. The alarm circuits including pull-boxes and automatic fire, smoke and heat detection apparatus and the audio circuits are fully and continuously supervised against component failure by means of a plurality of current responsive relays. The audio path including the speaker system and associated amplifiers is continuously monitored by a low level supersonic 26KC signal. Fail-safe features utilizing multi-contact switches and relays are incorporated throughout the system to prevent inadvertent silencing of alarms in the absence of an alarm condition.

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