发明名称 |
Tension sensing security apparatus and method for fencing |
摘要 |
The security device receives longitudinal tension from a taut wire of a fence and preferably is placed in-line in the taut wire system away from posts used to support the fence. The security device senses variations in the longitudinal tension in the taut wire and produces a tension signal which is transmitted to a central location when it senses such a tension deviation. The security device may be used in conjunction with a resistance sensing device to provide further protection. The resistance of a conductive loop formed either by the taut wire or by the combination of the taut wire and another conductor is monitored and a resistance signal is produced when it senses either a discontinuity or a variation in the resistance of the loop. The method of the present invention includes steps for receiving the tension in the taut wire and producing a signal when the tension in the taut wire varies more than a triggering amount. Further features of the present invention include anti-tampering arrangements including features that produce a tampering signal when the lid is removed from the device and when an attempt is made to clamp the device to its protective housing.
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申请公布号 |
US5371488(A) |
申请公布日期 |
1994.12.06 |
申请号 |
US19930069197 |
申请日期 |
1993.05.27 |
申请人 |
WAYMAX, INC. |
发明人 |
COUCH, IRVIN W.;HAMMER, BILLY M.;COUCH, KEITH |
分类号 |
G08B13/12;(IPC1-7):G08B13/12 |
主分类号 |
G08B13/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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