EP0317101A3 - A security system and a signal-carrying member therefor - Google Patents

A security system and a signal-carrying member therefor Download PDF

Info

Publication number
EP0317101A3
EP0317101A3 EP88310110A EP88310110A EP0317101A3 EP 0317101 A3 EP0317101 A3 EP 0317101A3 EP 88310110 A EP88310110 A EP 88310110A EP 88310110 A EP88310110 A EP 88310110A EP 0317101 A3 EP0317101 A3 EP 0317101A3
Authority
EP
European Patent Office
Prior art keywords
signal
carrying member
conductive
security system
semi
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88310110A
Other versions
EP0317101A2 (en
EP0317101B1 (en
Inventor
Hugh Macpherson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WL Gore and Associates Inc
Original Assignee
WL Gore and Associates Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WL Gore and Associates Inc filed Critical WL Gore and Associates Inc
Priority to AT88310110T priority Critical patent/ATE98045T1/en
Publication of EP0317101A2 publication Critical patent/EP0317101A2/en
Publication of EP0317101A3 publication Critical patent/EP0317101A3/en
Application granted granted Critical
Publication of EP0317101B1 publication Critical patent/EP0317101B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/32—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks
    • H01B7/328—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks comprising violation sensing means

Landscapes

  • Burglar Alarm Systems (AREA)
  • Alarm Systems (AREA)
  • Communication Cables (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

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.
EP88310110A 1987-11-19 1988-10-27 A security system and a signal-carrying member therefor Expired - Lifetime EP0317101B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88310110T ATE98045T1 (en) 1987-11-19 1988-10-27 SECURITY SYSTEM AND A SIGNAL CARRYING ELEMENT FOR IT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8727092 1987-11-19
GB8727092A GB2212644B (en) 1987-11-19 1987-11-19 A signal-carrying member for a security system

Publications (3)

Publication Number Publication Date
EP0317101A2 EP0317101A2 (en) 1989-05-24
EP0317101A3 true EP0317101A3 (en) 1989-09-27
EP0317101B1 EP0317101B1 (en) 1993-12-01

Family

ID=10627211

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88310110A Expired - Lifetime EP0317101B1 (en) 1987-11-19 1988-10-27 A security system and a signal-carrying member therefor

Country Status (7)

Country Link
EP (1) EP0317101B1 (en)
JP (1) JPH01289017A (en)
AT (1) ATE98045T1 (en)
AU (1) AU2216688A (en)
DE (1) DE3886011T2 (en)
GB (1) GB2212644B (en)
HK (1) HK126693A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2254720B (en) * 1988-06-17 1993-02-17 Gore & Ass Security enclosures
GB8814471D0 (en) * 1988-06-17 1988-07-20 Gore & Ass Security enclosure
US4935699A (en) * 1989-05-15 1990-06-19 Westinghouse Electric Corp. Means to detect and locate pinching and chafing of conduits
GB9016795D0 (en) * 1990-07-31 1990-09-12 Weyrad Electronics Ltd Improvements relating to security systems
GB9115641D0 (en) * 1991-07-19 1991-09-04 Gore W L & Ass Uk Protective sheath
FR2781574B1 (en) * 1998-07-24 2000-10-06 Regis Julien SECURE POWER SUPPLY SYSTEM AND METHOD, AND ELECTRIC CABLE IMPLEMENTED IN THIS SYSTEM
ES2178596B1 (en) * 2001-02-28 2004-10-01 Juan Manuel Optral S.A. COATING FOR PROTECTION AGAINST ANIMALS AND INSECTS OF AN CABLE OF ANY KIND.
EP1553422B1 (en) 2004-01-09 2010-03-10 Stribel Production GmbH Electric supply system including short-circuit and interrupt detection for vehicle power systems
FR2947665A1 (en) * 2009-07-01 2011-01-07 Nexans CABLE COMPRISING DETECTION MEANS FOR DETECTING THE PRESENCE OF AN ELECTRICALLY CONDUCTIVE BODY OUTSIDE THE CABLE
CN103357137A (en) * 2013-07-25 2013-10-23 成都陵川特种工业有限责任公司 Apparatus for detecting fire extinguishing launcher
CN111863334B (en) * 2020-08-01 2021-08-27 江苏江扬特种电缆有限公司 High-safety communication cable and using method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB378634A (en) * 1930-08-08 1932-08-18 Siemens Ag Improvements in the protection of electrical conductors against glow discharge
EP0049104A1 (en) * 1980-09-25 1982-04-07 BICC Limited Electric cables comprising a semiconducting screening layer
EP0120479A2 (en) * 1983-03-23 1984-10-03 Nippon Steel Corporation Structure fastening cable

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5146081B1 (en) * 1970-12-28 1976-12-07

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB378634A (en) * 1930-08-08 1932-08-18 Siemens Ag Improvements in the protection of electrical conductors against glow discharge
EP0049104A1 (en) * 1980-09-25 1982-04-07 BICC Limited Electric cables comprising a semiconducting screening layer
EP0120479A2 (en) * 1983-03-23 1984-10-03 Nippon Steel Corporation Structure fastening cable

Also Published As

Publication number Publication date
GB2212644A (en) 1989-07-26
HK126693A (en) 1993-11-26
GB2212644B (en) 1991-10-09
GB8727092D0 (en) 1987-12-23
DE3886011D1 (en) 1994-01-13
EP0317101A2 (en) 1989-05-24
JPH01289017A (en) 1989-11-21
EP0317101B1 (en) 1993-12-01
DE3886011T2 (en) 1994-06-16
ATE98045T1 (en) 1993-12-15
AU2216688A (en) 1989-05-25

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