Intrusion warning wire fence

Details Intrusion warning wire fence Intrusion warning wire fence

1986-03-25

1987-06-30

Kundrat, Andrew V.

Fences

Driftage control

256 10, 340550, E04H 1700

Patent

active

046764852

ABSTRACT:
This invention relates to an intrusion warning wire fence secured to spaced supporting poles. The fence comprises one or more electrical and/or optical conductors, preferably optical fibers, which may be either (1) incorporated within one or more tubular wires of said wire fence and/or (2) associated exteriorly with one or more wires of said fence, and/or (3) arranged freely in the fence, and which are connected to an intrusion warning system capable of emitting a warning and/or alarm signal in case of breakage or reduction of the conduction capability of at least one of said conductors. According to the invention, in order to prevent anyone from stepping over or scaling the fence, the fence is extended upwards beyond the upper ends of the supporting poles. This and this upper unsupported portion of the fence will be either distorted (bent, flexed) and/or broken, at least locally, if anyone tries to scale the fence. Extending in the upper unsupported portion of the fence and/or between this upper unsupported portion of the fence and the supporting poles, and/or between said upper unsupported portion and the underlying portion of the fence which is stretched between the supporting poles, is at least one electrical and/or optical conductor which will be either broken or distorted (bent, stretched, crushed) as a result of any breakage or distortion of the upper unsupported portion of the fence, so as to provide a warning or alarm signal.

REFERENCES:
patent: 3771767 (1973-11-01), Dougherty
patent: 4318088 (1982-03-01), Hunter
patent: 4525701 (1985-06-01), Leih
patent: 4558308 (1985-12-01), Ciordinik et al.

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