公开(公告)号：US4978942A

公开(公告)日：1990-12-18

申请号：US373410

申请日：1989-06-30

申请人： Richard L. Bruce

发明人： Richard L. Bruce

IPC分类号： G08B13/183

CPC分类号： G08B15/001 ,  G08B13/183

摘要： A station is provided with an external industrial container-shaped shell having a window therein for admitting the passage of a monitoring beam therethrough. The preferably infrared beam is initiated by a beam transmitter having a lens aimed at a corresponding beam receiver in a second station, the stations being adapted for employment in pairs. Interruption of the beam by either an intruder passing between the pair of stations or tampering with a barrel causes a signal to be transmitted to a remote alarm. The housing is designed to be inconspicuous so that an intruder will not locate the station and thereby avoid detection.

摘要翻译： 车站设置有外部工业容器形壳体，其中具有用于允许监控梁通过的通道的窗口。 优选地，红外光束由具有针对第二站中的对应的光束接收器的透镜的光束发射器发起，所述电台适于成对使用。 通过在一对站之间通过的闯入者或篡改桶的入侵者的中断使得信号被传送到远程警报。 外壳被设计为不显眼，以致入侵者不能定位车站，从而避免检测。