Fire detector

Communications: electrical – Condition responsive indicating system – Specific condition

Patent

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Details

340529, 340577, 340587, 340628, G08B 1700, G08B 1706, G08B 1710

Patent

active

047092297

ABSTRACT:
Fire detection apparatus includes a fire detector panel and an accumulation-type control panel in which the fire detection element is non-latching but the fire voltage detection circuit includes a fire indicator which is latched when a fire signal is detected for longer than a predetermined time. The circuit for latching is controlled by an accumulation circuit in the control panel that controls a relay closing that generates a fixed voltage suitable for the fire indicator.

REFERENCES:
patent: 3257653 (1966-06-01), McCorkindale
patent: 4123656 (1978-10-01), Kajii
patent: 4151522 (1979-04-01), Yamauchi
patent: 4249168 (1981-02-01), Muggli
patent: 4524351 (1985-06-01), Kimura et al.

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