Security enclosures

Details Security enclosures Security enclosures

1992-06-18

1994-03-01

Cuomo, Peter M.

Safes, bank protection, or a related device

Combined

With alarm, signal or indicator

340550, 428915, 428916, 2064591, 206807, 109 38, G08B 1300

Patent

active

052897850

ABSTRACT:
A security enclosure comprises a first layer of an insulating material extending over the whole of the area of the enclosure and carrying a linear electrically responsive element on at least one surface. A low tensile strength layer having lower cohesion than adhesion is located between the first layer of insulating material and the electrically responsive element. A second layer of insulating material is adhered to and covers the electrically responsive element. The element is arranged in a configuration on the surface so dividing the surface that attempted penetration of the enclosure changes an electrical characteristic of the element, the change being detectable by an electrical circuit. An attempt to remove the second layer of insulating material to gain access to the element results in breakup of the low tensile strength layer and thus damage to the element and produces a detectable change in an electrical characteristic of the element.

REFERENCES:
patent: 3594770 (1971-07-01), Ham
patent: 3623944 (1971-11-01), Davis
patent: 3925584 (1975-12-01), Suzuki et al.
patent: 4749084 (1988-06-01), Pereyra
patent: 4754629 (1988-07-01), Allen
patent: 4882216 (1989-11-01), Takimoto et al.
patent: 4894271 (1990-01-01), Hani et al.
patent: 4910045 (1990-03-01), Giesecke et al.
patent: 4954185 (1990-09-01), Kohm
patent: 4972175 (1990-11-01), MacPherson
patent: 4985294 (1991-01-01), Watanabe et al.

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