EP0802543A1 - Quad having a metal holding ribbon - Google Patents

Quad having a metal holding ribbon Download PDF

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Publication number
EP0802543A1
EP0802543A1 EP97400849A EP97400849A EP0802543A1 EP 0802543 A1 EP0802543 A1 EP 0802543A1 EP 97400849 A EP97400849 A EP 97400849A EP 97400849 A EP97400849 A EP 97400849A EP 0802543 A1 EP0802543 A1 EP 0802543A1
Authority
EP
European Patent Office
Prior art keywords
strip
quarter
tape
conductors
edges
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Withdrawn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
EP97400849A
Other languages
German (de)
French (fr)
Inventor
Jean Gombert
Gilles Labbay
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.)
Sagem SA
Original Assignee
Societe Anonyme de Telecommunications SAT
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 Societe Anonyme de Telecommunications SAT filed Critical Societe Anonyme de Telecommunications SAT
Publication of EP0802543A1 publication Critical patent/EP0802543A1/en
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    • 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
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/10—Screens specially adapted for reducing interference from external sources
    • H01B11/1016—Screens specially adapted for reducing interference from external sources composed of a longitudinal lapped tape-conductor
    • 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
    • H01B11/005—Quad constructions

Definitions

  • the present invention relates to a fourth.
  • Quarters are known, in particular star quads used in telecommunications electrical lines.
  • the star quads consist of two pairs of insulated conductors arranged at the top of a square, the two conductors of the same pair being arranged along a diagonal of the square.
  • the conductors must be twisted and the pitch must be all the shorter as the requested speed is high.
  • local networks are asked to transmit rates of 150 Mbits / s or even more by signals at frequencies of 100 MHz or more.
  • star quads comprising insulated conductors arranged in a cylindrical tube of extruded synthetic material.
  • the conductors In order for the conductors to be properly held, in particular during the handling of wiring during which several fourths are brought together to form a cable, it is necessary that the tube is fairly rigid and thick enough. Quarters of known structure are therefore difficult to handle.
  • Document GB-A-1,413,924 also discloses a fourth star comprising insulated conductors surrounded by a strip screen spaced from the conductors and whose longitudinal edges overlap. Maintaining the insulated conductors in position is ensured in this type of quarter by a filling material placed around the insulated conductors. As a result, such a quarter is rigid and therefore difficult to handle.
  • a quarter comprising four insulated conductors, surrounded by a ribbon having overlapping edges, characterized in that the ribbon is in contact with the insulated conductors to hold them, and is fixed on itself along at least one of its edges.
  • the insulated conductors are kept in a precise position while retaining great flexibility of the quarter obtained so that the operations subsequent wiring are greatly simplified.
  • the retaining tape comprises an internal layer of synthetic material
  • the retaining tape is fixed on itself by glue.
  • the retaining tape is metallic, the latter is fixed on itself by a weld.
  • the retaining tape has a circular external contour.
  • the retaining tape ensures centering of the quarter in a connection device and therefore facilitates the positioning of the end of the quarter in the connection device.
  • the fourth star comprises, in a manner known per se, four conductors 1 isolated by a solid or cellular dielectric material 2 such as polyethylene, polypropylene, polyvinyl chloride or a fluorinated polymer .
  • a solid or cellular dielectric material 2 such as polyethylene, polypropylene, polyvinyl chloride or a fluorinated polymer .
  • the insulated conductors are surrounded by a metal strip 3, for example an aluminum strip with a thickness of 125 ⁇ m which is shaped during installation according to a cylinder whose edges are overlap and which has a circular external contour 4.
  • the metal strip 3 is welded to itself along its external edge 5, for example by laser welding forming a weld bead 6 inscribed in the circular outer contour 4 of the metallic strip.
  • the quarter further comprises a tearing cord 8 made of synthetic material disposed between the insulated conductors and the retaining tape in order to allow easy tearing of the retaining tape by pulling the tearing rope laterally.
  • a tearing cord 8 made of synthetic material disposed between the insulated conductors and the retaining tape in order to allow easy tearing of the retaining tape by pulling the tearing rope laterally.
  • the metal strip ensures excellent crosstalk between the quarters and protection against the radiation of the cable or against external disturbances.
  • the use of a metallic tape makes it possible to obtain a holding the quarter with a very thin ribbon so that a transmission cable produced with the quarter according to the invention may comprise a large number of quads while having a small footprint.
  • the second embodiment of a quarter star comprises, as previously, four conductors 1 insulated by a dielectric material 2 and arranged at the top of a square.
  • the retaining tape 3 this time comprises an external metallic layer 3.1 and an internal layer of synthetic material, for example polyester.
  • the composite tape has a total thickness of 50 ⁇ m and is wound in a helix, the edges 5 of the retaining tape 3 being arranged to overlap.
  • the retaining tape is fixed on itself along its edges by a bead of glue 7.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Insulated Conductors (AREA)
  • Communication Cables (AREA)

Abstract

The wiring arrangement has four conductors (1) which are insulated (2) e.g. with cellular polyethylene, polypropylene, polyvinyl chloride or a fluorinated polymer, and surrounded collectively by a strip (3) of e.g. aluminium 125 mu m thick, wound to form a circular cylinder (4). The edges (5) of the strip are overlapped and held together e.g. by a laser weld (6) within the overall circular contour of the cable. Alternatively the arrangement may have a square cross-section with rounded corners, the strip comprising an outer metallic coating and an inner layer of synthetic material, e.g. polyester. The strip is wound helically and its overlapped edges are glued together.

Description

La présente invention concerne une quarte.The present invention relates to a fourth.

On connaît des quartes, notamment des quartes étoile utilisées dans les lignes électriques de télécommunication. Les quartes étoile sont constituées de deux paires de conducteurs isolés disposés au sommet d'un carré, les deux conducteurs d'une même paire étant disposés selon une diagonale du carré.Quarters are known, in particular star quads used in telecommunications electrical lines. The star quads consist of two pairs of insulated conductors arranged at the top of a square, the two conductors of the same pair being arranged along a diagonal of the square.

On sait que le positionnement relatif des conducteurs formant une quarte étoile est essentiel pour obtenir des couplages capacitifs et inductifs déterminés dont dépend la qualité de la transmission des informations. Ces couplages doivent être réalisés de façon d'autant plus précise que l'on souhaite faire passer un grand débit d'informations. Tout défaut de symétrie de la quarte se traduit par des couplages parasites entraînant des erreurs de transmission qui ne peuvent être corrigées qu'au dépend du débit des informations transmises.It is known that the relative positioning of the conductors forming a fourth star is essential for obtaining determined capacitive and inductive couplings on which the quality of the information transmission depends. These couplings must be carried out all the more precisely if it is desired to pass a large flow of information. Any lack of symmetry in the fourth results in parasitic couplings causing transmission errors which can only be corrected depending on the speed of the information transmitted.

Par ailleurs pour assurer une transmission satisfaisante les conducteurs doivent être torsadés et le pas doit être d'autant plus court que le débit demandé est élevé.Furthermore, to ensure satisfactory transmission, the conductors must be twisted and the pitch must be all the shorter as the requested speed is high.

A titre d'exemple on demande dans les réseaux locaux de transmettre des débits de 150 Mbits/s ou même plus par des signaux à des fréquences de 100 MHz ou plus.For example, local networks are asked to transmit rates of 150 Mbits / s or even more by signals at frequencies of 100 MHz or more.

On connaît, notamment du document FR-A-2.144.573 des quartes étoile comportant des conducteurs isolés disposés dans un tube cylindrique en matière synthétique extrudée. Afin que les conducteurs soient convenablement maintenus, en particulier lors des manipulations de câblage au cours desquelles plusieurs quartes sont réunies pour former un câble, il est nécessaire que le tube soit assez rigide et assez épais. Les quartes de structure connue sont donc d'une manipulation mal aisée.Are known, in particular from document FR-A-2,144,573, star quads comprising insulated conductors arranged in a cylindrical tube of extruded synthetic material. In order for the conductors to be properly held, in particular during the handling of wiring during which several fourths are brought together to form a cable, it is necessary that the tube is fairly rigid and thick enough. Quarters of known structure are therefore difficult to handle.

On connaît également du document GB-A-1.413.924 une quarte étoile comprenant des conducteurs isolés entourés d'un écran en bande espacé des conducteurs et dont les bords longitudinaux se chevauchent. Le maintien des conducteurs isolés en position est assuré dans ce type de quarte par un matériau de remplissage disposé autour des conducteurs isolés. Il en résulte qu'une telle quarte est rigide et donc de manipulation mal aisée.Document GB-A-1,413,924 also discloses a fourth star comprising insulated conductors surrounded by a strip screen spaced from the conductors and whose longitudinal edges overlap. Maintaining the insulated conductors in position is ensured in this type of quarter by a filling material placed around the insulated conductors. As a result, such a quarter is rigid and therefore difficult to handle.

Selon l'invention on propose une quarte comportant quatre conducteurs isolés, entourés d'un ruban ayant des bords se chevauchant, caractérisée en ce que le ruban est en contact avec les conducteurs isolés pour maintenir ceux-ci, et est fixé sur lui-même le long d'au moins un de ses bords.According to the invention there is provided a quarter comprising four insulated conductors, surrounded by a ribbon having overlapping edges, characterized in that the ribbon is in contact with the insulated conductors to hold them, and is fixed on itself along at least one of its edges.

Ainsi, même en utilisant un ruban de maintien de faible épaisseur, par exemple un ruban d'aluminium de quelques dizaines de micromètres, on maintient les conducteurs isolés dans une position précise tout en conservant une grande flexibilité de la quarte obtenue de sorte que les opérations de câblage ultérieures sont grandement simplifiées.Thus, even using a thin holding tape, for example an aluminum tape of a few tens of micrometers, the insulated conductors are kept in a precise position while retaining great flexibility of the quarter obtained so that the operations subsequent wiring are greatly simplified.

Selon un mode de réalisation dans lequel le ruban de maintien comporte une couche interne en matière synthétique, le ruban de maintien est fixé sur lui-même par de la colle.According to an embodiment in which the retaining tape comprises an internal layer of synthetic material, the retaining tape is fixed on itself by glue.

Selon un autre mode de réalisation dans lequel le ruban de maintien est métallique, celui-ci est fixé sur lui-même par une soudure.According to another embodiment in which the retaining tape is metallic, the latter is fixed on itself by a weld.

Selon une version avantageuse de l'invention le ruban de maintien comporte un contour externe circulaire. Ainsi le ruban de maintien assure un centrage de la quarte dans un dispositif de connexion et facilite donc la mise en place de l'extrémité de la quarte dans le dispositif de connexion.According to an advantageous version of the invention, the retaining tape has a circular external contour. Thus the retaining tape ensures centering of the quarter in a connection device and therefore facilitates the positioning of the end of the quarter in the connection device.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui suit de deux modes de réalisation particuliers non limitatifs de l'invention, en référence aux figures ci-jointes parmi lesquelles:

  • la figure 1 est vue en coupe très agrandie d'un premier mode de réalisation de l'invention ;
  • la figure 2 est une vue en coupe très agrandie d'un second mode de réalisation de l'invention.
Other characteristics and advantages of the invention will appear on reading the following description of two particular non-limiting embodiments of the invention, with reference to the attached figures among which:
  • Figure 1 is a greatly enlarged sectional view of a first embodiment of the invention;
  • Figure 2 is a greatly enlarged sectional view of a second embodiment of the invention.

En référence à la figure 1, la quarte étoile selon l'invention comporte d'une façon connue en soi quatre conducteurs 1 isolés par un matériau diélectrique 2 plein ou cellulaire tel que du polyéthylène, du polypropylène, du polychlorure de vinyle ou un polymère fluoré. Lors de la réalisation de la quarte étoile, les quatre conducteurs isolés sont torsadés tout en étant guidés pour les maintenir de façon précise au sommet d'un carré.With reference to FIG. 1, the fourth star according to the invention comprises, in a manner known per se, four conductors 1 isolated by a solid or cellular dielectric material 2 such as polyethylene, polypropylene, polyvinyl chloride or a fluorinated polymer . When making the fourth star, the four insulated conductors are twisted while being guided to hold them precisely at the top of a square.

Selon le premier mode de réalisation de l'invention, les conducteurs isolés sont entourés d'un ruban métallique 3, par exemple un ruban en aluminium d'une épaisseur de 125 µm qui est conformé lors de la pose selon un cylindre dont les bords se chevauchent et qui présente un contour externe circulaire 4. Dans ce mode de réalisation, le ruban métallique 3 est soudé sur lui-même le long de son bord externe 5, par exemple par une soudure au laser formant un cordon de soudure 6 inscrit dans le contour externe circulaire 4 du ruban métallique.According to the first embodiment of the invention, the insulated conductors are surrounded by a metal strip 3, for example an aluminum strip with a thickness of 125 μm which is shaped during installation according to a cylinder whose edges are overlap and which has a circular external contour 4. In this embodiment, the metal strip 3 is welded to itself along its external edge 5, for example by laser welding forming a weld bead 6 inscribed in the circular outer contour 4 of the metallic strip.

De préférence la quarte comprend en outre un filin de déchirement 8 en matière synthétique disposé entre les conducteurs isolés et le ruban de maintien afin de permettre un déchirement aisé du ruban de maintien en tirant latéralement le filin de déchirement.Preferably the quarter further comprises a tearing cord 8 made of synthetic material disposed between the insulated conductors and the retaining tape in order to allow easy tearing of the retaining tape by pulling the tearing rope laterally.

On remarquera que lors du câblage ultérieur de la quarte selon l'invention avec d'autres quartes du même type, le ruban métallique assure une excellente diaphonie entre les quartes et une protection contre le rayonnement du câble ou contre les perturbations extérieures. En outre l'utilisation d'un ruban métallique permet d'obtenir une tenue de la quarte avec un ruban de très faible épaisseur de sorte qu'un câble de transmission réalisé avec la quarte selon l'invention peut comporter un grand nombre de quartes tout en ayant un faible encombrement.It will be noted that during the subsequent wiring of the quarter according to the invention with other quarters of the same type, the metal strip ensures excellent crosstalk between the quarters and protection against the radiation of the cable or against external disturbances. In addition, the use of a metallic tape makes it possible to obtain a holding the quarter with a very thin ribbon so that a transmission cable produced with the quarter according to the invention may comprise a large number of quads while having a small footprint.

En référence à la figure 2, le second mode de réalisation de quarte étoile selon l'invention comporte comme précédemment quatre conducteurs 1 isolés par un matériau diélectrique 2 et disposés au sommet d'un carré. Le ruban de maintien 3 comporte cette fois une couche externe métallique 3.1 et une couche interne en matière synthétique, par exemple du polyester.With reference to FIG. 2, the second embodiment of a quarter star according to the invention comprises, as previously, four conductors 1 insulated by a dielectric material 2 and arranged at the top of a square. The retaining tape 3 this time comprises an external metallic layer 3.1 and an internal layer of synthetic material, for example polyester.

Dans ce mode de réalisation le ruban composite a une épaisseur totale de 50 µm et est enroulé en hélice, les bords 5 du ruban de maintien 3 étant disposés pour se chevaucher. Dans ce mode de réalisation le ruban de maintien est fixé sur lui-même le long de ses bords par un cordon de colle 7.In this embodiment, the composite tape has a total thickness of 50 μm and is wound in a helix, the edges 5 of the retaining tape 3 being arranged to overlap. In this embodiment, the retaining tape is fixed on itself along its edges by a bead of glue 7.

Bien entendu l'invention n'est pas limitée aux modes de réalisation décrits et on peut y apporter des variantes de réalisation sans sortir du cadre de l'invention tel que défini par les revendications.Of course, the invention is not limited to the embodiments described and it is possible to make variant embodiments without departing from the scope of the invention as defined by the claims.

En particulier, bien que l'invention ait été décrite en relation avec une quarte étoile dans laquelle les conducteurs isolés sont disposés en contact les uns avec les autres, on peut prévoir de les monter sur un jonc central comportant des alvéoles pour le positionnement des conducteurs isolés afin que la position relative des conducteurs soit maintenue de façon très précise pendant la mise en place du ruban de maintien.In particular, although the invention has been described in relation to a quarter star in which the insulated conductors are arranged in contact with one another, provision can be made for mounting them on a central rod comprising cells for positioning the conductors insulated so that the relative position of the conductors is very precisely maintained during the positioning of the retaining tape.

Bien que l'invention ait été décrite en relation avec un ruban de maintien métallique ou métallisé on peut également prévoir un ruban de maintien en matière synthétique posé le long ou enroulé en hélice.Although the invention has been described in relation to a metallic or metallized retaining tape, it is also possible to provide a retaining tape made of synthetic material placed along or wound in a helix.

Bien que l'invention ait été plus particulièrement décrite en relation avec une quarte étoile, elle s'applique également à une quarte double paire.Although the invention has been more particularly described in relation to a quarter star, it also applies to a double pair quarter.

Claims (4)

Quarte comportant quatre conducteurs isolés (1), entourés d'un ruban (3) ayant des bords se chevauchant, caractérisée en ce que le ruban (3) est en contact avec les conducteurs isolés pour maintenir ceux-ci, et est fixé sur lui-même le long d'au moins un de ses bords (5).Quarter comprising four insulated conductors (1), surrounded by a tape (3) having overlapping edges, characterized in that the tape (3) is in contact with the insulated conductors to hold them, and is fixed on it - even along at least one of its edges (5). Quarte selon la revendication 1, caractérisée en ce que le ruban de maintien comporte une couche interne en matière synthétique (3.2) et en ce que le ruban de maintien est fixé sur lui-même par de la colle (7).Quarter according to claim 1, characterized in that the retaining tape has an internal layer of synthetic material (3.2) and in that the retaining tape is fixed on itself by glue (7). Quarte selon la revendication 1, caractérisée en ce que le ruban de maintien est métallique et est fixé sur lui-même par une soudure (6).Quarter according to claim 1, characterized in that the retaining tape is metallic and is fixed on itself by a weld (6). Quarte selon la revendication 1, caractérisée en ce que le ruban de maintien (3) comporte un contour externe (4) circulaire.Quarter according to claim 1, characterized in that the retaining tape (3) has a circular external contour (4).
EP97400849A 1996-04-19 1997-04-15 Quad having a metal holding ribbon Withdrawn EP0802543A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9604923 1996-04-19
FR9604923A FR2747828B1 (en) 1996-04-19 1996-04-19 QUARTER COMPRISING A METAL HOLDING TAPE

Publications (1)

Publication Number Publication Date
EP0802543A1 true EP0802543A1 (en) 1997-10-22

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EP97400849A Withdrawn EP0802543A1 (en) 1996-04-19 1997-04-15 Quad having a metal holding ribbon

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EP (1) EP0802543A1 (en)
FR (1) FR2747828B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10036805A1 (en) * 2000-07-28 2002-02-07 Tesa Ag Process for sheathing elongated goods, such as cable sets in particular
EP2790189A1 (en) * 2013-04-08 2014-10-15 Nexans Data-transmission cable for the aeronautical industry

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1413924A (en) * 1973-04-19 1975-11-12 Pirelli Telecommunications cables
US4151365A (en) * 1977-08-22 1979-04-24 Western Electric Company, Inc. Filled service cable having corrugated shield and methods of making

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1413924A (en) * 1973-04-19 1975-11-12 Pirelli Telecommunications cables
US4151365A (en) * 1977-08-22 1979-04-24 Western Electric Company, Inc. Filled service cable having corrugated shield and methods of making

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10036805A1 (en) * 2000-07-28 2002-02-07 Tesa Ag Process for sheathing elongated goods, such as cable sets in particular
US7282250B2 (en) 2000-07-28 2007-10-16 Tesa Ag Method for providing longitudinally extended articles, such as cable assemblies, with a sheathing
EP2790189A1 (en) * 2013-04-08 2014-10-15 Nexans Data-transmission cable for the aeronautical industry

Also Published As

Publication number Publication date
FR2747828B1 (en) 1998-05-22
FR2747828A1 (en) 1997-10-24

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