HK126693A - A signal-carrying member for a security system - Google Patents

A signal-carrying member for a security system

Info

Publication number
HK126693A
HK126693A HK1266/93A HK126693A HK126693A HK 126693 A HK126693 A HK 126693A HK 1266/93 A HK1266/93 A HK 1266/93A HK 126693 A HK126693 A HK 126693A HK 126693 A HK126693 A HK 126693A
Authority
HK
Hong Kong
Prior art keywords
conductive
signal
carrying member
semi
security system
Prior art date
Application number
HK1266/93A
Inventor
Hugh Macpherson
Original Assignee
Gore & Ass
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 Gore & Ass filed Critical Gore & Ass
Publication of HK126693A publication Critical patent/HK126693A/en

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)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Communication Cables (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.
HK1266/93A 1987-11-19 1993-11-18 A signal-carrying member for a security system HK126693A (en)

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 (1)

Publication Number Publication Date
HK126693A true HK126693A (en) 1993-11-26

Family

ID=10627211

Family Applications (1)

Application Number Title Priority Date Filing Date
HK1266/93A HK126693A (en) 1987-11-19 1993-11-18 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
ZA816401B (en) * 1980-09-25 1982-09-29 Bicc Ltd Electric cables
EP0120479B1 (en) * 1983-03-23 1990-08-29 Nippon Steel Corporation Structure fastening cable

Also Published As

Publication number Publication date
AU2216688A (en) 1989-05-25
GB2212644B (en) 1991-10-09
EP0317101A2 (en) 1989-05-24
EP0317101A3 (en) 1989-09-27
JPH01289017A (en) 1989-11-21
EP0317101B1 (en) 1993-12-01
ATE98045T1 (en) 1993-12-15
GB2212644A (en) 1989-07-26
GB8727092D0 (en) 1987-12-23
DE3886011T2 (en) 1994-06-16
DE3886011D1 (en) 1994-01-13

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)