专利名称：FIRE ALARM SYSTEM发明人：NAME NOT GIVEN申请号：AU4375189申请日：19891025公开号：AU4375189A公开日：19900503
摘要：A fire alarm system includes a receiver (1) adapted to detect the presence of afire on the basis of analog detection data contained in a received signal which isconnected by means of a transmission line (2) to a plurality of analog type sensors (3),each of which is arranged in a respective monitoring area monitored by the receiver and isadapted to produce analog detection data representative of the value of a parameter, ora change thereof, caused by a fire and to transmit the data to the receiver. Associatedwith each analog type sensor (3) is a plurality of on-off type sensors (7) which arearranged in the same monitoring area as the associated analog type sensor, are adaptedto be switched to produce a fire signal when the change in the said parameter exceeds apredetermined threshold value and are connected to a common signal line (6) connectedto the associated analog type sensor (3).
申请人：HOCHIKI CORPORATION
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