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FR2487568A1 - Coaxial cable with thin wall tubular core conductor - internally supported against collapse by pref. expanded polyethylene or polyurethane rod in compression - Google Patents

Coaxial cable with thin wall tubular core conductor - internally supported against collapse by pref. expanded polyethylene or polyurethane rod in compression Download PDF

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Publication number
FR2487568A1
FR2487568A1 FR8016436A FR8016436A FR2487568A1 FR 2487568 A1 FR2487568 A1 FR 2487568A1 FR 8016436 A FR8016436 A FR 8016436A FR 8016436 A FR8016436 A FR 8016436A FR 2487568 A1 FR2487568 A1 FR 2487568A1
Authority
FR
France
Prior art keywords
tubular core
pref
tube
core according
coaxial cable
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
FR8016436A
Other languages
French (fr)
Other versions
FR2487568B1 (en
Inventor
Jean-Loup Bocher
Louis Le Davay
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.)
Cables de Lyon SA
Original Assignee
Cables de Lyon SA
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 Cables de Lyon SA filed Critical Cables de Lyon SA
Priority to FR8016436A priority Critical patent/FR2487568A1/en
Publication of FR2487568A1 publication Critical patent/FR2487568A1/en
Application granted granted Critical
Publication of FR2487568B1 publication Critical patent/FR2487568B1/fr
Granted legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1808—Construction of the conductors
    • 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
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable

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  • Insulated Conductors (AREA)

Abstract

The core conductor for a coaxial cable comprises a thin-wall metal tube supported internally by a rod of insulating material such as a solid rod or thick-wall tube of plastics material. To reduce overall wt. and inhibit collapse or kinking of the conductor if the cable is flexed or bent. Pref. the core conductor is of copper, either welded or seamless extruded tube. Pref. the internal support is of expanded high mol. wt. polyethylene or of expanded polyurethane resin, pref. contained in compression to inhibit interfacial penetration by moisture.

Description

Ame pour câble coaxial
La présente invention concerne la technique des câbles de télécommunication et porte plus particulièrement sur une âme pour câble coaxial.Core for coaxial cable
The present invention relates to the technique of telecommunication cables and relates more particularly to a core for coaxial cable.

Il est connu que les feeders coaxiaux sont réalisés à partir d'un certain diamètre avec un conducteur intérieur tubulaire creux, cette disposition étant rendue possible par le fait que par effet de peau, le courant HF se concentre sur une très petite épaisseur du conducteur intérieur. It is known that coaxial feeders are made from a certain diameter with a hollow tubular inner conductor, this arrangement being made possible by the fact that by skin effect, the HF current is concentrated on a very small thickness of the inner conductor .

La plupart des tubes utilisés sont d'une épaisseur suffisante pour permettre les opérations successives de fabrication avec enroulements et déroulements, oe qui entraîne un coût relativement élevé. Most of the tubes used are of sufficient thickness to allow successive manufacturing operations with windings and unwinds, which has a relatively high cost.

On a donc cherché à diminuer ltépaisseur du tube et pour qutil garde un diamètre uniforme il est connu que lton peut faire une opération de cannelage, le tube ondulé devenant souple et gardant sa section, chaque ondulation étant parfaitement résistante par effet de voûte. We have therefore sought to reduce the thickness of the tube and to keep it a uniform diameter, it is known that lton can do a fluting operation, the corrugated tube becoming flexible and retaining its section, each corrugation being perfectly resistant by effect of arch.

Cependant dans certains cas, il est souhaitable d'utiliser un tube lisse å paroi mince malgré sa fragilité. In some cases, however, it is desirable to use a smooth, thin-walled tube despite its brittleness.

La présente invention a pour but une disposition permettant de conserver une âme en tube lisse et mince. The object of the present invention is to provide an arrangement making it possible to keep a core in a smooth and thin tube.

Elle a pour objet une âme tubulaire pour câble coaxial, caractérisé par le fait qu'elle est formée par un tube métallique conducteur à paroi mince comportant intérieurement un matériau de renforcement. It relates to a tubular core for coaxial cable, characterized in that it is formed by a conductive metal tube with thin wall internally comprising a reinforcing material.

De manière préférentielle le matériau de renforcement est une matière plastique telle qu'un polyéthylène cellulaire à haut poids moléculaire ou un polyuréthane cellulaire. Preferably, the reinforcing material is a plastic material such as a high molecular weight cellular polyethylene or a cellular polyurethane.

D'autres caractéristiques et les avantages de l'invention apparaî- tront au cours de la description d'un exemple de réalisation illustré dans le dessin annexé. Dans ce dessin : - La figure 1 montre un câble traditionnel avec une âme en tube épais, selon l'art connu donné ci-avant, - La figure 2 montre en câble traditionnel avec tube cannelé, selon l'art connu ci-avant, - La figure 3 montre le câble présentant une âme selon la présente invention.  Other characteristics and advantages of the invention will appear during the description of an exemplary embodiment illustrated in the appended drawing. In this drawing: - Figure 1 shows a traditional cable with a thick tube core, according to the known art given above, - Figure 2 shows a traditional cable with grooved tube, according to the known art above, - Figure 3 shows the cable having a core according to the present invention.

Dans la figure 1, l'âme est constituée d'un tube 1 relativement épais. Dans la figure 2, un tube plus mince et ondulé 2 constitue l'amie du câble. In Figure 1, the core consists of a relatively thick tube 1. In FIG. 2, a thinner and corrugated tube 2 constitutes the friend of the cable.

En regard de la figure 3, on voit que, selon l'invention l'amie est constituée d'un tube métallique mince 3 dans lequel est introduit un jonc de matière plastique 4, plein, tubulaire, ou cellulaire, suffisamment comprimé pour stappuyer fortement sur les parois du tube mince qui peut alors être plié sans perdre sa forme, cette disposition rappelant le procédé des plombiers qui remplissent de sable les tubes avant de les cintrer. With reference to FIG. 3, it can be seen that, according to the invention, the friend consists of a thin metal tube 3 into which is inserted a plastic rod 4, solid, tubular, or cellular, sufficiently compressed to strongly support on the walls of the thin tube which can then be bent without losing its shape, this arrangement recalling the process of plumbers who fill the tubes with sand before bending them.

La fabrication d'une telle âme peut se faire par injection dans un tube mince de matière plastique telle qutun polyuréthane liquide qui se polymèrise en donnant un matériau cellulaire compact ou un polyéthylène cellulaire à haut poids moléculaire. Le tube peut être extrudé sans soudure ou obtenu par soudure en long d'une bande de métal, dans ce dernier cas la soudure de la bande de métal peut être faite autour du jonc rond et calibré. Le tube sera avantageusement en cuivre. The manufacture of such a core can be done by injection into a thin tube of plastic material such as a liquid polyurethane which polymerizes to give a compact cellular material or a cellular polyethylene of high molecular weight. The tube can be extruded without welding or obtained by welding along a metal strip, in the latter case the welding of the metal strip can be done around the round and calibrated rod. The tube will advantageously be made of copper.

Les méthodes de fabrication bien connues ne font pas l'objet de l'invention. The well known manufacturing methods are not the subject of the invention.

L'âme ainsi réalisée présente l'avantage d'assurer, en complément de sa bonne tenue mécanique, une étanehéité longitudinale excellente.  The core thus produced has the advantage of ensuring, in addition to its good mechanical strength, excellent longitudinal etaneity.

Claims (11)

REVENDICATIONS 1/ Ame tubulaire pour câble coaxial, caractérisée par le fait qu'elle est formée par un tube métallique conducteur à paroi mince comportant intérieurement un matériau de renforcement.1 / Tubular core for coaxial cable, characterized in that it is formed by a conductive metallic tube with thin wall internally comprising a reinforcing material. 2/ Ame tubulaire selon la revendication 1, caractérisée par le fait que le tube métallique est extrudé sans soudure.2 / tubular core according to claim 1, characterized in that the metal tube is extruded without welding. 3/ Ame tubulaire selon la revendication 1, caractérisée par le fait que le tube est obtenu à partir d'une bande de métal soudée.3 / tubular core according to claim 1, characterized in that the tube is obtained from a welded metal strip. 4/ Ame tubulaire selon l'une des revendications 1 à 3, caractérisée par le fait que le tube est en cuivre. 4 / Tubular core according to one of claims 1 to 3, characterized in that the tube is made of copper. 5/ Ame tubulaire selon l'une des revendications 1 à 4, caractérisée par le fait que ledit matériau de renforcement est un jonc de matière plastique.5 / tubular core according to one of claims 1 to 4, characterized in that said reinforcing material is a plastic rod. 6/ Ame tubulaire selon la revendication 5, caractérisée par le fait que le jonc en matière plastique est plein.6 / tubular core according to claim 5, characterized in that the plastic rod is full. 7/ Ame tubulaire selon la revendication 5, caractérisée par le fait que le jonc en matière plastique est tubulaire.7 / tubular core according to claim 5, characterized in that the plastic rod is tubular. 8/ Ame tubulaire selon la revendication 5, caractérisée par le fait que la matière plastique est un polyéthylène à haut poids moléculaire.8 / tubular core according to claim 5, characterized in that the plastic is a high molecular weight polyethylene. 9/ Ame tubulaire selon la revendication 5, caractérisée par le fait que la matière plastique est un polyuréthane cellulaire.9 / tubular core according to claim 5, characterized in that the plastic material is a cellular polyurethane. 10/ Ame tubulaire selon l'une des revendications 1 à 9, caractérisée par le fait que le matériau de renforcement est comprimé dans le tube.10 / Tubular core according to one of claims 1 to 9, characterized in that the reinforcing material is compressed in the tube. 11/ Ame tubulaire selon l'une des revendications 1 à 9, caractérisée par le fait que le matériau de renforcement est un matériau d'étanchéification longitudinale. 11 / Tubular core according to one of claims 1 to 9, characterized in that the reinforcing material is a longitudinal sealing material.
FR8016436A 1980-07-25 1980-07-25 Coaxial cable with thin wall tubular core conductor - internally supported against collapse by pref. expanded polyethylene or polyurethane rod in compression Granted FR2487568A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8016436A FR2487568A1 (en) 1980-07-25 1980-07-25 Coaxial cable with thin wall tubular core conductor - internally supported against collapse by pref. expanded polyethylene or polyurethane rod in compression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8016436A FR2487568A1 (en) 1980-07-25 1980-07-25 Coaxial cable with thin wall tubular core conductor - internally supported against collapse by pref. expanded polyethylene or polyurethane rod in compression

Publications (2)

Publication Number Publication Date
FR2487568A1 true FR2487568A1 (en) 1982-01-29
FR2487568B1 FR2487568B1 (en) 1983-08-26

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FR8016436A Granted FR2487568A1 (en) 1980-07-25 1980-07-25 Coaxial cable with thin wall tubular core conductor - internally supported against collapse by pref. expanded polyethylene or polyurethane rod in compression

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0504776A1 (en) * 1991-03-21 1992-09-23 Filotex Low loss coaxial cable
WO2004075214A1 (en) * 2003-02-18 2004-09-02 Outokumpu Oyj Cable structure and the use of copper in said structure
US6800809B2 (en) 1997-08-14 2004-10-05 Commscope Properties, Llc Coaxial cable and method of making same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1590278A1 (en) * 1966-01-07 1970-04-16 Dow Chemical Co Improved conductors for high frequency cables

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1590278A1 (en) * 1966-01-07 1970-04-16 Dow Chemical Co Improved conductors for high frequency cables

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0504776A1 (en) * 1991-03-21 1992-09-23 Filotex Low loss coaxial cable
FR2674365A1 (en) * 1991-03-21 1992-09-25 Filotex Sa COAXIAL CABLE WITH LOW LOSSES.
US5235299A (en) * 1991-03-21 1993-08-10 Filotex Low loss coaxial cable
US6800809B2 (en) 1997-08-14 2004-10-05 Commscope Properties, Llc Coaxial cable and method of making same
WO2004075214A1 (en) * 2003-02-18 2004-09-02 Outokumpu Oyj Cable structure and the use of copper in said structure

Also Published As

Publication number Publication date
FR2487568B1 (en) 1983-08-26

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