Security enclosures
First Claim
1. A laminate for use in forming security enclosures comprising:
- a flexible, electrically insulating sheet carrying lines of electrically conductive material on each side, the lines defining a conductor extending over both sides of the sheet, electrical connection between lines on one side of the sheet and respective lines on the other side of the sheet being provided by line connections located adjacent to edges of the sheet and extending through the sheet, and at least one edge of the laminate the line connections adjacent to said at least one edge being spaced inwardly from said one edge of the sheet and separated from said one edge by a line-carrying portion of sheet, an attempt to penetrate the laminate resulting in damage to the lines and changing a detectable electrical characteristics of the conductor; and
means for connecting the conductor to means for detecting such changes wherein the sheet further includes a line carrying core portion completely bounded by said line connections and a line carrying extension portion at an edge of the core portion at said at least one edge of the sheet, the core portion having lines on one side of the sheet connected to lines on the other side of the core portion through said line connections and also having lines connected to lines on the extension portion.
1 Assignment
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Accused Products
Abstract
There is disclosed a security enclosure including a folded, flexible, electrically insulating sheet extending over the whole of the area of the enclosure and carrying lines of electrically responsive material on each side, the lines defining a conductor extending over both sides of the sheet, electrical connections between lines on one side of the sheet and respective lines on the other side of the sheet being provided by line connections extending through the sheet and at selected edges of the sheet the line connections being spaced inwardly of the edge and separated from the edges by a respective line-carrying portion of sheet. The enclosure includes a circuit for detecting a change in an electrical characteristic of the conductor caused by an attempt to penetrate the sheet.
48 Citations
18 Claims
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1. A laminate for use in forming security enclosures comprising:
- a flexible, electrically insulating sheet carrying lines of electrically conductive material on each side, the lines defining a conductor extending over both sides of the sheet, electrical connection between lines on one side of the sheet and respective lines on the other side of the sheet being provided by line connections located adjacent to edges of the sheet and extending through the sheet, and at least one edge of the laminate the line connections adjacent to said at least one edge being spaced inwardly from said one edge of the sheet and separated from said one edge by a line-carrying portion of sheet, an attempt to penetrate the laminate resulting in damage to the lines and changing a detectable electrical characteristics of the conductor; and
means for connecting the conductor to means for detecting such changes wherein the sheet further includes a line carrying core portion completely bounded by said line connections and a line carrying extension portion at an edge of the core portion at said at least one edge of the sheet, the core portion having lines on one side of the sheet connected to lines on the other side of the core portion through said line connections and also having lines connected to lines on the extension portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- a flexible, electrically insulating sheet carrying lines of electrically conductive material on each side, the lines defining a conductor extending over both sides of the sheet, electrical connection between lines on one side of the sheet and respective lines on the other side of the sheet being provided by line connections located adjacent to edges of the sheet and extending through the sheet, and at least one edge of the laminate the line connections adjacent to said at least one edge being spaced inwardly from said one edge of the sheet and separated from said one edge by a line-carrying portion of sheet, an attempt to penetrate the laminate resulting in damage to the lines and changing a detectable electrical characteristics of the conductor; and
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10. A security enclosure comprising:
- a flexible, electrically insulating sheet defining a plurality of folds and extending over the whole of the area of the enclosure and carrying lines of electrically responsive material on each side, the lines defining a conductor extending over both sides of the sheet, electrical connections between lines on one side of the sheet and respective lines on the other side of the sheet provided by line connections located adjacent to edges of the sheet and extending through the sheet and at least of one or more selected edges of the sheet the respective line connections adjacent to each selected edge being spaced inwardly of the edge and separated from the edge by a respective line-carrying portion of sheet;
means for detecting a change in an electrical characteristic of the conductor caused by an attempt to penetrate the sheet; and
means for connecting the conductor to the detecting means wherein the sheet includes a line carrying core portion completely bounded by said line connections and line carrying extension portions at respective edges of the core portion at said one or more selected edges of the sheet, the core portion having lines on one side of the sheet connected to lines on the other side of the core portion through line connections and also having lines connected to lines on the extension portions, and at least some of the extensions portions being overlapped and joined to complementary portions of the sheet to define the enclosure. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
- a flexible, electrically insulating sheet defining a plurality of folds and extending over the whole of the area of the enclosure and carrying lines of electrically responsive material on each side, the lines defining a conductor extending over both sides of the sheet, electrical connections between lines on one side of the sheet and respective lines on the other side of the sheet provided by line connections located adjacent to edges of the sheet and extending through the sheet and at least of one or more selected edges of the sheet the respective line connections adjacent to each selected edge being spaced inwardly of the edge and separated from the edge by a respective line-carrying portion of sheet;
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18. A method of forming a security enclosure comprising:
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providing a flexible, electrically insulating sheet carrying lines of electrically responsive material on each side, the lines defining a conductor extending over both sides of the sheet, electrical connections between lines on one side of the sheet and respective lines on the other side of the sheet being provided by line connections extending through the sheet, the sheet including a line carrying core portion completely bounded by said line connections and line carrying extension portions, each extension portion defining an edge of the sheet and at selected edges of the core portion the line connections adjacent to said selected edges being spaced inwardly of the respective adjacent edge of the sheet and separated from said adjacent edge by a respective extension portion; providing means for detecting a change in an electrical characteristic of the conductor caused by an attempt to penetrate the sheet; providing means for connecting the conductor to the detecting means; folding the sheet between the core portion and the extension portions to form an enclosure and such that respective edge portions of the sheet overlap; and fixing the overlapping edge portions of the sheet to one another.
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Specification