Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1993-05-27
1994-12-06
Swann, Glen
Communications: electrical
Condition responsive indicating system
Specific condition
340664, 340666, 340668, G08B 1312
Patent
active
053714881
ABSTRACT:
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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Couch Irvin W.
Couch Keith
Hammer Billy M.
Swann Glen
Waymax, Inc.
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