Security fence

Details Security fence Security fence

1987-05-07

1988-10-11

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340550, 340555, G08B 1300

Patent

active

047774762

ABSTRACT:
A security fence including a multiplicity of rigid bar elements disposed in a fence configuration, an optical fiber extending through at least some of the hollow rigid bar elements and apparatus for providing predetermined bending of the optical fiber in response to bending of at least some of the rigid bar elements by at least a given amount.

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patent: 4538527 (1985-09-01), Kitchen
patent: 4558308 (1985-12-01), Ciordinik et al.
patent: 4574192 (1986-03-01), Kitagawa et al.
patent: 4586030 (1986-04-01), Klostermann
patent: 4680573 (1987-07-01), Ciordinik et al.

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