Security fence

Details Security fence Security fence

1995-07-26

1997-01-07

Mullen, Thomas

Communications: electrical

Condition responsive indicating system

Specific condition

25022714, 340555, 385 13, G08B 1300

Patent

active

055921493

ABSTRACT:
A security fence where in a frame there is provided a netting of a single continuous weft-knitted optical wire attached under tension to said frame, where one end of the wire is connected to a light source and the other to a light receiver. Any abrupt change in the intensity of the light passing through the optical wire actuates an alarm.

REFERENCES:
patent: 4399430 (1983-08-01), Kitchen
patent: 4558308 (1985-12-01), Ciordinik et al.
patent: 4772092 (1988-09-01), Hofer et al.
patent: 4777476 (1988-10-01), Dank
patent: 5049855 (1991-09-01), Slemon et al.
patent: 5103208 (1992-04-01), Riordan
patent: 5416467 (1995-05-01), Ohta et al.
patent: 5434557 (1995-07-01), alizi
patent: 5680573 (1987-07-01), Ciordinik et al.

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