Composite wire and fence made therefrom useful for security purp

Details Composite wire and fence made therefrom useful for security purp Composite wire and fence made therefrom useful for security purp

1977-04-26

1979-05-15

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340541, 340564, G08B 1322

Patent

active

041550838

ABSTRACT:
At least two conductive wire elements which are separated from each other by a thin insulating layer such that as soon as a pressure is exerted on the composite wire at least one of the electrical characteristics, contact resistance and/or capacitance between the elements, changes to a measurable extent. A fence constructed of such composite wire has a circuit connected with both conductive wire elments for detecting any deviation in the nominal value of contact resistance and/or capacitance between them and for controlling an alarm circuit responsive to such deviation.

REFERENCES:
patent: 2101040 (1937-12-01), Bayley et al.
patent: 3696373 (1972-10-01), Dunn et al.
patent: 3803548 (1974-04-01), Skujins, Jr.
patent: 4040044 (1977-08-01), Laymon et al.

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