Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1993-11-02
1996-11-26
Mullen, Thomas
Communications: electrical
Condition responsive indicating system
Specific condition
200 85R, 340665, G08B 1300
Patent
active
055789900
ABSTRACT:
A device that mounts on the top of each fence post along a security fence and utilizes an alarming arm which produces an electric alarm signal when moved or displaced. When a multiplicity of the units are mounted on the tops of all of the fence posts along a security fence with the alarming arms pointed outward from the fence line and barrier material is strung between the alarming arms, an extended barrier is created which increases the height of the security fence and produces an alarm when an intruder attempts to climb over the extended barrier and moves the alarming arm(s) or any member of the extended barrier supported by the alarming arm(s), thus moving the alarming arms. An extended barrier may also be installed along the top of walls by installing a plurality of devices spaced at distances approximating the spacing of fence posts along a line of security fence with barrier materials strung between the alarming arm(s). The unit(s) will automatically reset to a non alarming state when the weight is removed. The tension on the alarming arm(s) can be pre-set to accommodate heavy barrier materials such as razor ribbon concertina.
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Vindicator, "VTW-300 Electronics Taut Wire Fence", Aug. 1989.
Sanford, Jr. Jack G.
Sanford, Sr. Jack G.
Mullen Thomas
Reilly Patrick T.
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