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1. 发明授权

US4703312A Voice-override alarm system 失效
标题翻译：语音覆盖报警系统
公开(公告)号：US4703312A
公开(公告)日：1987-10-27
申请号：US899153
申请日：1986-08-22
申请人： Robert W. Berry, III
发明人： Robert W. Berry, III
IPC分类号： G08B29/06 , G08B29/00
CPC分类号： G08B29/06
摘要： An emergency alarm system incorporating both signal generation and voice annunciation capabilities, for installation in a building or other structure. The system includes a standard fire alarm control panel and one or more loud speakers, each speaker having a series blocking capacitor. The panel has conventional supervisory circuitry and sensing/alarm terminals connected therewith, adapted to indicate an alarm condition when conditions warrant, as by signals received on multiple sensor lines that also communicate with the panel. A signal generator and amplifier are arranged to drive the speakers, under alarm conditions. There is provided a circuit-failure indicator including an electrical switch and an electro-responsive actuator device connected with the signal generator. The electro-responsive actuator device, when energized by the signal generator, maintains the switch in a closed-circuit condition. An electrically conducting loop circuit is connected with the sensing/alarm terminals of the fire alarm control panel, the loop circuit involving the two speaker lines and a d.c. conducting shunt. The electrical switch is connected in series in the loop circuit whereby failure of either the signal generator or amplifier results in the open-circuiting of the switch, thereby distrubing the continuity of the loop circuit. By the above arrangement, breakage of either speaker line of the loop circuit, or open-circuiting of the electrical switch will result in activation of the sensing device of the fire alarm control panel, through solely its two sensing/alarm terminals, in order to indicate the existence of a trouble condition.
摘要翻译：一种包含信号发生和声音通知功能的紧急报警系统，用于安装在建筑物或其他结构中。该系统包括一个标准的火灾报警控制面板和一个或多个扬声器，每个扬声器都有串联阻塞电容。该面板具有传统的监控电路和与之相连的传感/报警终端，适用于在条件允许的情况下指示报警状态，如同在与面板通信的多个传感器线路上接收的信号。信号发生器和放大器被布置成在报警条件下驱动扬声器。提供了一种电路故障指示器，包括电开关和与信号发生器连接的电响应致动器装置。当电信号发生器通电时，电响应致动器装置将开关保持在闭合状态。一个导电环路与火灾报警控制面板的感应/报警端连接，环路包括两个扬声器线路和直流电路。进行分流电开关串联在环路中，由此信号发生器或放大器的故障导致开关的开路，从而分配环路电路的连续性。通过上述布置，环路电路的任一扬声器线的断线或电开关的断路将导致仅通过其两个感测/报警端子激活火灾报警控制面板的感测装置，以便表示存在故障状况。

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