EP 0317101 B1 19931201 - A security system and a signal-carrying member therefor.
Title (en)
A security system and a signal-carrying member therefor.
Title (de)
Sicherheitssystem und ein signaltragendes Glied dafür.
Title (fr)
Système de sécurité et un membre portant un signal à cet effet.
Publication
Application
Priority
GB 8727092 A 19871119
Abstract (en)
[origin: EP0317101A2] A security system comprises a signal-carrying member and a detector for detecting a change in the resistance of a conductive path surrounding a core of the signal-carrying member. The conductive path comprises inner and outer layers (11,13) of semi-conductive tape separated by an insulating layer (12) but interconnected at one end. The semi-conductive tape of at least the outer layer is made of fibrous material such as carbon-loaded PTFE such that when a sharp object pierces the outer layer (13) and the insulating layer (12), semi-conductive fibres are dragged from the outer layer into contact with the inner layer (11) and form a conductive bridge between the layers.
IPC 1-7
IPC 8 full level
G01R 31/02 (2006.01); H01B 7/32 (2006.01); H01B 11/00 (2006.01); H04K 3/00 (2006.01)
CPC (source: EP)
H01B 7/328 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0317101 A2 19890524; EP 0317101 A3 19890927; EP 0317101 B1 19931201; AT E98045 T1 19931215; AU 2216688 A 19890525; DE 3886011 D1 19940113; DE 3886011 T2 19940616; GB 2212644 A 19890726; GB 2212644 B 19911009; GB 8727092 D0 19871223; HK 126693 A 19931126; JP H01289017 A 19891121
DOCDB simple family (application)
EP 88310110 A 19881027; AT 88310110 T 19881027; AU 2216688 A 19880913; DE 3886011 T 19881027; GB 8727092 A 19871119; HK 126693 A 19931118; JP 29036988 A 19881118