Intruder detection security system
AssigneePilkington P.E. Limited
InventorCedric A. Kitchen
Life of this patent
Estimating the term…
Abstract
A security system having a mesh-like intruder detection structure for use as or with a security fence 2 or for detecting intruders jumping down from a fence or wall. The structure is made up from a number of elongated members (4, 6, 8, 10, 12, 14) each in the form of or including a fibre-optic waveguide, the elongated members being secured together at a number of spaced jointing points (20) spaced 20 cms or less apart. Portions of the elongated members at the jointing points are held in a position fixed relative to one another by encapsulating the jointing points in a plastics material (40), welding the portions together and/or surrounding them with a metal ferrule (38).
Claims22
A security system comprising at least two elongated members (4, 6, 8, 10, 12, 14) together forming a mesh-like intruder detection structure characterised in that at least one of the elongated members (4, 6, 8, 10, 12, 14) is or includes a fibre-optic waveguide, the structure having a number of jointing points (20) at which portions of at least two elongated members (4, 6, 8, 10, 12, 14) are secured by securing means (40, 48, 50, 52, 54) in a position fixed relative to one another, means being provided to ensure damage to the waveguide when one of the elongated members (4, 6, 8, 10, 12, 14) is subjected to a predetermined load, and a warning device (24, 34) to produce an alarm condition in response to damage to the waveguide.
A mesh-like intruder detection structure comprising at least two elongated members (4, 6, 8, 10, 12, 14) characterised in that at least one of the elongated members (4, 6, 8, 10, 12, 14) is or includes a fibre-optic waveguide, the structure having a number of jointing points (20) at which portions of at least two elongated members (4, 6, 8, 10, 12, 14) are secured by securing means (40, 48, 50, 52, 54) in a position fixed relative to one another, means being provided to ensure damage to the waveguide when one or more of the elongated members (40, 48, 50, 52, 54) is subjected to a predetermined load.
A method of producing a mesh for use as an intruder detection structure characterised by the steps of welding at least two elongated members (4, 6, 8, 10, 12, 14) together to form a number of spaced welded joints (20), at least one of the elongated members (4, 6, 8, 10, 12, 14) including a fibre-optic waveguide, and encapsulating the welded joints (20) with a material (40) which ensures damage to the waveguide when one of the elongated members (4, 6, 8, 10, 12, 14) is subjected to a predetermined load.
Dependencies are inferred from the claim text.