EP0593043A1 - Grillage à surveillance électrique - Google Patents

Grillage à surveillance électrique Download PDF

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Publication number
EP0593043A1
EP0593043A1 EP93116579A EP93116579A EP0593043A1 EP 0593043 A1 EP0593043 A1 EP 0593043A1 EP 93116579 A EP93116579 A EP 93116579A EP 93116579 A EP93116579 A EP 93116579A EP 0593043 A1 EP0593043 A1 EP 0593043A1
Authority
EP
European Patent Office
Prior art keywords
individual
wire mesh
wire
plastic
layer
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.)
Withdrawn
Application number
EP93116579A
Other languages
German (de)
English (en)
Inventor
Bernard F. Haverkamp
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0593043A1 publication Critical patent/EP0593043A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires
    • G08B13/122—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a perimeter fence

Definitions

  • the present invention relates to an electrically monitorable wire mesh made of a plurality of intermeshed, plastic-coated individual wires, each individual wire being electrically conductively connected to a further individual wire at each of its two ends to form a continuous electrical conductor.
  • Such a wire mesh is known from German Offenlegungsschrift 37 23 903. Since all the individual wires of such a wire mesh are connected to one another in an electrically conductive manner, the monitoring of a fence made of the mesh can be represented particularly easily. If a single wire is cut to cut a hole in the fence, the detection line is interrupted; the resistance of the chain link fence becomes infinite, and a current flow stops, whereupon an alarm is triggered.
  • the object of the present invention is to remedy this.
  • reliability should be increased and maintained over a long-term period.
  • this object is achieved in that the plastic jacket is constructed at least in two layers. Due to the two- or multi-layer structure of the plastic casing the risk that individual individual wires of the wire mesh fence get earth fault is significantly reduced.
  • the total thickness of the multi-layer plastic jacket need not be greater than that of the conventional simple plastic jacket.
  • the multilayer structure alone ensures that external influences, in particular mechanical and / or chemical, do not lead to damage to the entire plastic sheath, which results in a ground fault of the individual wire in question.
  • the inner layer is expediently thinner than the outer layer.
  • the wire mesh according to the invention there is no molecular connection between the individual layers of the plastic jacket. This ensures that damage caused in particular by mechanical influences in the outer layer does not continue into the adjacent layer.
  • One way to establish a molecular connection between the individual layers to exclude the plastic jacket is to use different plastics for the individual layers; however, this is by no means mandatory.
  • a separating layer made of a material different from the plastic of the jacket can also be provided between the individual layers of the plastic jacket. Partition waxes or the like are particularly suitable as means for producing a separating layer.
  • Each individual wire of the wire mesh according to the invention can be constructed with one or more wires, with the individual wires being electrically insulated from one another and optically indistinguishable in the case of a multi-wire construction.
  • This makes it relatively difficult to bridge a planned interruption in the detection line in the case of single wires with a single-core structure; because as the number of cores of each individual wire increases, the likelihood of connecting the correct cores to one another decreases before a single wire is cut.
  • the multi-layer structure of the plastic sheath can be realized in that each core is assigned an individual innermost layer, while at least an outer layer surrounds all veins together.
  • an electrically conductive layer is provided under the outermost layer of the plastic jacket, for example in the form of a metal foil.
  • the electrically conductive layer below the respective outermost layer of the plastic sheath of the individual wires meshed with one another are also connected to one another in an electrically conductive manner.
  • a control circuit of the resistance to the earth can determine possible damage to the outermost layer of the plastic sheath, which leads to a ground fault in the underlying electrically conductive layer. In this way, the condition of the plastic casing can be monitored in the long term without the reliability of the monitoring of the chain link fence being impaired; and a section of the chain link fence where the integrity of the plastic sheath deteriorates can be replaced in good time.
  • the inventive coating of the individual wires of the wire mesh with A multi-layer plastic sheath can advantageously be used in the same way for cross-braids and for longitudinal braids, ie both for braids that lead to a fence with vertical braiding, and for braids that lead to a horizontally braided fence.
  • the section of the wire mesh fence according to the invention shown in the drawing shows a plurality of individual wires which are meshed with one another in a known manner (DE-OS 37 23 903). On the basis of one of the individual wires 1, it is shown that it is surrounded by a plastic sheath 2, which is constructed in two layers. An inner layer 2a of the plastic sheath 2 immediately surrounds the respective individual wire 1; the inner layer 2a of the plastic jacket is surrounded by an outer layer 2b.
  • the inner is Layer 2a with a coating 3 of a suitable release agent.
  • two individual wires are electrically conductively connected to one another in a known manner (DE-PS 37 23 903), so that all the individual wires of the wire mesh together form a continuous electrical conductor.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fencing (AREA)
EP93116579A 1992-10-14 1993-10-13 Grillage à surveillance électrique Withdrawn EP0593043A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4234634 1992-10-14
DE4234634 1992-10-14
DE4323645 1993-07-15
DE4323645 1993-07-15

Publications (1)

Publication Number Publication Date
EP0593043A1 true EP0593043A1 (fr) 1994-04-20

Family

ID=25919454

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93116579A Withdrawn EP0593043A1 (fr) 1992-10-14 1993-10-13 Grillage à surveillance électrique

Country Status (1)

Country Link
EP (1) EP0593043A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102704821A (zh) * 2012-06-15 2012-10-03 浙江三星特种纺织有限公司 一种新型的防盗网
US8916773B2 (en) 2008-11-20 2014-12-23 Young Il MOK High conductivity wire and method of manufacturing the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1278646A (en) * 1969-06-19 1972-06-21 Shorrock Dev Protective barrier
DE2856819A1 (de) * 1978-12-30 1980-07-17 Wilhelm Tretschoks Geflechtsdraht fuer sicherheitszaeune
DE3101708A1 (de) * 1981-01-21 1982-08-26 Horst Thomas Drahtzaunbau & Baustoffgrosshandlung, 4630 Bochum Sicherheitszaun zur einfriedung von besonders gefaehrdeten objekten
FR2546427A1 (fr) * 1983-05-27 1984-11-30 Dirickx Sa Grillage ondule tisse pour signalisation d'effraction et applications dudit grillage
DE3723903A1 (de) * 1987-07-18 1989-01-26 Bernhard Haverkamp Maschendrahtgeflecht fuer elektrisch ueberwachte zaeune

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1278646A (en) * 1969-06-19 1972-06-21 Shorrock Dev Protective barrier
DE2856819A1 (de) * 1978-12-30 1980-07-17 Wilhelm Tretschoks Geflechtsdraht fuer sicherheitszaeune
DE3101708A1 (de) * 1981-01-21 1982-08-26 Horst Thomas Drahtzaunbau & Baustoffgrosshandlung, 4630 Bochum Sicherheitszaun zur einfriedung von besonders gefaehrdeten objekten
FR2546427A1 (fr) * 1983-05-27 1984-11-30 Dirickx Sa Grillage ondule tisse pour signalisation d'effraction et applications dudit grillage
DE3723903A1 (de) * 1987-07-18 1989-01-26 Bernhard Haverkamp Maschendrahtgeflecht fuer elektrisch ueberwachte zaeune

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8916773B2 (en) 2008-11-20 2014-12-23 Young Il MOK High conductivity wire and method of manufacturing the same
CN102704821A (zh) * 2012-06-15 2012-10-03 浙江三星特种纺织有限公司 一种新型的防盗网
CN102704821B (zh) * 2012-06-15 2016-02-24 浙江三星特种纺织有限公司 一种防盗网

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