GB8727092D0 - Security system - Google Patents

Security system

Info

Publication number
GB8727092D0
GB8727092D0 GB878727092A GB8727092A GB8727092D0 GB 8727092 D0 GB8727092 D0 GB 8727092D0 GB 878727092 A GB878727092 A GB 878727092A GB 8727092 A GB8727092 A GB 8727092A GB 8727092 D0 GB8727092 D0 GB 8727092D0
Authority
GB
United Kingdom
Prior art keywords
conductive
semi
layer
outer layer
security system
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
GB878727092A
Other versions
GB2212644A (en
GB2212644B (en
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 GB8727092A priority Critical patent/GB2212644B/en
Publication of GB8727092D0 publication Critical patent/GB8727092D0/en
Priority to AU22166/88A priority patent/AU2216688A/en
Priority to DE3886011T priority patent/DE3886011T2/en
Priority to EP88310110A priority patent/EP0317101B1/en
Priority to AT88310110T priority patent/ATE98045T1/en
Priority to JP63290369A priority patent/JPH01289017A/en
Publication of GB2212644A publication Critical patent/GB2212644A/en
Application granted granted Critical
Publication of GB2212644B publication Critical patent/GB2212644B/en
Priority to HK1266/93A priority patent/HK126693A/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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.
GB8727092A 1987-11-19 1987-11-19 A signal-carrying member for a security system Expired - Fee Related GB2212644B (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB8727092A GB2212644B (en) 1987-11-19 1987-11-19 A signal-carrying member for a security system
AU22166/88A AU2216688A (en) 1987-11-19 1988-09-13 A security system and a signal-carrying member therefor
DE3886011T DE3886011T2 (en) 1987-11-19 1988-10-27 Security system and a signal-carrying link for it.
EP88310110A EP0317101B1 (en) 1987-11-19 1988-10-27 A security system and a signal-carrying member therefor
AT88310110T ATE98045T1 (en) 1987-11-19 1988-10-27 SECURITY SYSTEM AND A SIGNAL CARRYING ELEMENT FOR IT.
JP63290369A JPH01289017A (en) 1987-11-19 1988-11-18 Signal transmission member for security system
HK1266/93A HK126693A (en) 1987-11-19 1993-11-18 A signal-carrying member for a security system

Applications Claiming Priority (1)

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

Publications (3)

Publication Number Publication Date
GB8727092D0 true GB8727092D0 (en) 1987-12-23
GB2212644A GB2212644A (en) 1989-07-26
GB2212644B GB2212644B (en) 1991-10-09

Family

ID=10627211

Family Applications (1)

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

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
GB8814471D0 (en) * 1988-06-17 1988-07-20 Gore & Ass Security enclosure
GB2254720B (en) * 1988-06-17 1993-02-17 Gore & Ass Security enclosures
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

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE381677A (en) * 1930-08-08
JPS5146081B1 (en) * 1970-12-28 1976-12-07
DK410281A (en) * 1980-09-25 1982-03-26 Bicc Ltd ELECTRICAL CABLE
EP0120479B1 (en) * 1983-03-23 1990-08-29 Nippon Steel Corporation Structure fastening cable

Also Published As

Publication number Publication date
JPH01289017A (en) 1989-11-21
GB2212644A (en) 1989-07-26
AU2216688A (en) 1989-05-25
ATE98045T1 (en) 1993-12-15
GB2212644B (en) 1991-10-09
EP0317101B1 (en) 1993-12-01
EP0317101A2 (en) 1989-05-24
EP0317101A3 (en) 1989-09-27
DE3886011T2 (en) 1994-06-16
DE3886011D1 (en) 1994-01-13
HK126693A (en) 1993-11-26

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19981119