发明授权
US4709229A Fire detector 失效
火灾探测器

Fire detector
摘要:
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.
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