EP0669677A1 - Elektrische Verbinderanordnung für leitende Kabelabschirmung und Verfahren zu ihrer Ausführung - Google Patents

Elektrische Verbinderanordnung für leitende Kabelabschirmung und Verfahren zu ihrer Ausführung Download PDF

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Publication number
EP0669677A1
EP0669677A1 EP95420043A EP95420043A EP0669677A1 EP 0669677 A1 EP0669677 A1 EP 0669677A1 EP 95420043 A EP95420043 A EP 95420043A EP 95420043 A EP95420043 A EP 95420043A EP 0669677 A1 EP0669677 A1 EP 0669677A1
Authority
EP
European Patent Office
Prior art keywords
cable
electrical connection
flexible
connector
connection device
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
EP95420043A
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English (en)
French (fr)
Other versions
EP0669677B1 (de
Inventor
Pierre Francois
Eric Sauer
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.)
Societe Industrielle de Construction dAppareils et de Materiel Electriques SICAME SAS
Original Assignee
Societe Industrielle de Construction dAppareils et de Materiel Electriques SICAME SAS
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 Industrielle de Construction dAppareils et de Materiel Electriques SICAME SAS filed Critical Societe Industrielle de Construction dAppareils et de Materiel Electriques SICAME SAS
Publication of EP0669677A1 publication Critical patent/EP0669677A1/de
Application granted granted Critical
Publication of EP0669677B1 publication Critical patent/EP0669677B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
    • H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
    • H01R9/0512—Connections to an additional grounding conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6591—Specific features or arrangements of connection of shield to conductive members
    • H01R13/65912—Specific features or arrangements of connection of shield to conductive members for shielded multiconductor cable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
    • H01R4/646—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail for cables or flexible cylindrical bodies

Definitions

  • the present invention relates to an electrical connection device for screens of conductive cables, in particular telecommunications cables.
  • This invention applies more particularly to cables provided with a very thin protective screen, consisting of a metallic layer, in particular of aluminum, covered with an insulating protective layer, such as in polyethylene.
  • a screen with its connection device makes it possible to protect the cable which it surrounds against radioelectric and electromagnetic disturbances, and to ensure the earthing or grounding, by connecting for example a cable, belonging to an installation, to a structure receiving this installation, or to ensure continuity between two screens.
  • an aluminum protective screen having a thickness of between 80 and 200 microns, covered with a protective polyethylene film with a thickness of a few microns, maintained by adhesion (plasticization of aluminum) .
  • the screen thus formed is interposed between the bundle of electrical conductors of the cable and an insulating outer sheath, the installation of this screen and the outer sheath being achievable by extrusion.
  • connection is usually made on site, at the end of the cable, and it consists of more or less conveniently cutting a window or other interruption in the outer sheath, then installing a connecting claw with another cable to ensure continuity screen or its grounding (see document US-A-4051323 or its equivalent FR-A-2368156).
  • the invention aims to avoid these drawbacks, by providing a device making it possible to make an electrical connection with the screen at any point along the length of the cable, on a small part of the periphery thereof, quickly and easily, without risk of damage to the screen or to the conductors belonging to the cable.
  • the subject of the invention is essentially an electrical connection device for screens of conductive cables of the type concerned, the device comprising a connector with a rigid body capable of being supported in an area of the periphery of the cable, and a conductive element.
  • flexible filiform provided for entangling the cable while being positioned in a transverse groove dug in the insulating outer sheath of the cable over at least a fraction of its circumference and reaching the screen, means being provided for mooring one end of the filiform conducting element flexible on the connector body, and for immobilization with controlled mechanical tensioning of the part of this flexible conductive element embracing the cable.
  • the flexible filiform conductive element coming into contact with the cable protection screen, may take the form of a conductive braid or of a "flexible cable", or of a strip.
  • This flexible conductive element forms a loop which takes place in a groove dug in the thickness of the insulating outer sheath of the cable and preferably covering an arc of a circle less than a full circumference, while the rigid body of the connector is supported on the part of the outer insulating sheath remained intact.
  • one end of the flexible filiform conductive element is attached to the body of the connector by means of a threaded member for controlled mechanical tensioning, axially traversed by this end , the connector body comprising a housing such as a channel or notch receiving the strand of the flexible conductive element forming the end of the loop embracing the cable, a locking screw being provided for immobilizing this strand of the flexible conductive element in said housing.
  • the threaded member for controlled mechanical tensioning is an internally threaded socket, rotatably mounted but immobilized axially on the body of the connector, while the end of the flexible conductive element is provided with a externally threaded driver, cooperating with the internal thread of the sleeve.
  • the mechanical tensioning screw and the locking screw are fusible head screws, allowing easy control of their tightening torque, therefore control of the tension of the flexible conductive element embracing the cable, and its contact force on the screen, therefore optimal contact between this flexible conductive element and the screen belonging to the cable.
  • the connector is provided with a conductive braid, one end of which is integral with the body of this connector and intended to provide the envisaged electrical connection: earthing of the cable screen, continuity, equipotentiality, flow of electromagnetic disturbances.
  • the free strand of the flexible conductive element can be cut as close as possible to the body of the connector, after immobilization and tensioning of this element around the cable.
  • the free strand of the flexible filiform conductive element, not cut is used to directly provide the envisaged electrical connection, such as earthing of the cable screen.
  • the free end of the connecting braid or the free end of the flexible filiform conductive element is advantageously provided with a terminal, to be crimped or fixed by any other means, such as screwing. , for example on a ground plane.
  • connection device which is the subject of the invention may also comprise sealing and insulation means surrounding the connector as well as the cable.
  • the invention also relates to a method of producing an electrical connection for screens of conductive cables of the type concerned, with the use of the connection device defined above.
  • the grooving is carried out on a fraction of the complete circumference of the cable, for example in an arc of a circle of approximately 300 °, so as to leave a part of integral outer sheath on which the body of the connector is applied.
  • the groove is hollowed out in the insulating outer sheath of the cable by using a flexible, threadlike element of the rope type, encircling the cable and subjected to a back-and-forth movement.
  • the groove is thus easily formed, at the desired point on the cable, by a mechanical abrasion effect or by a thermal effect (local melting of the insulating sheath of the cable), or even by the combination of these two effects.
  • the operator printing the rope back and forth preferably by means of gripping means such as handles equipping the two ends of the rope, easily perceives the contact of this rope with the screen; the back and forth movement can even be continued on the screen without limit, because the risk of damage to the screen is practically zero here, whatever the nature of this screen.
  • the groove formed in the insulating sheath can immediately receive the flexible conductive element of the connector, then brought towards the cable. Note that the establishment of the connector does not require engaging the conductive element around the cable by one end thereof. Quite the contrary, the connector can be placed on a cable without accessibility at the ends, the flexible filiform conductive element being wound, in one turn, around the cable, before being brought back and locked on the body of the connector.
  • the device comprises a connector, generally designated by the reference 1, in which there is mainly a rigid body 2 of electrically conductive material, such as alloy copper, and a flexible thread-like conductive element 3, presenting itself as a conductive braid or a flexible cable, for example made of stainless steel.
  • the device also comprises a connecting braid 4, mechanically and electrically connected to the rigid body 2 of the connector 1.
  • This rigid body 2 comprises a base 5 of curved profile, intended to bear in a zone on the periphery of a cable 6 with protective screen 7.
  • a transverse threaded hole 8 and a channel 9 which both cross this massive part on both sides, in different planes.
  • a tensioning screw 10 provided with an axial bore 11 and a fuse head 12.
  • a first end of the cable 3 passes through the axial bore 11 of the screw 10, and is provided with an enlarged head 13 which bears on an internal retaining shoulder formed in the axial bore 11 of the screw 10.
  • the flexible cable 3 is designed to form, in the position of use of the connector 1, a loop embracing the cable 6, the cable strand 3 which forms the end of the loop being introduced through the transverse channel 9 of the body 2.
  • this body 2 is formed another tapped hole, opening into the channel 9 and receiving a locking screw 14 with a fuse head 15.
  • the loop formed by the cable 3 embracing the cable 6 is engaged in a transverse groove, hollowed out in the insulating outer sheath 16 of the cable 6 (in a way described in detail below) over at least a fraction of its circumference, the bottom of the groove reaching the protective screen 7.
  • the locking of the cable 3 by tightening the screw 14, followed by its controlled mechanical tensioning around of the cable 6 by tightening the screw 10, provides the mechanical connection and the electrical contact between the screen 7 belonging to the cable 6, on the one hand, and the cable 3, therefore the body 2 of the connector 1, on the other hand .
  • the braid 4 made of copper as a bare braid, or coated with an insulator in the manner of a small cable, here provides the desired electrical connection between the connector 1 and an external element not shown, such as ground network.
  • the first end of the braid 4 is crimped at 17 on the rigid body 2 of the connector 1.
  • the other end, initially free, of the braid 4 is provided with a lug 18, designed to be crimped, screwed, welded or fixed by any other means on said external element, so as to ensure electrical continuity.
  • the free strand 19 of the cable 3, that is to say the part not forming the loop and located beyond the body 2 of the connector 1, can here be cut as close as possible to body 2 and eliminated, as illustrated in FIG. 3.
  • Figures 4 and 5 show a second embodiment of the invention, in which the rigid body 2 of the connector 1 comprises, in addition to a solid part with a tapped hole receiving the tensioning screw 10 of the cable 3, a tab in which is formed a notch 20.
  • a tapped hole, opening into the notch 20, receives a locking screw 14 with fuse head 15, with an axis parallel to the tensioning screw 10, and located in the same transverse plane.
  • the cable 3, forming in a transverse plane a loop which embraces the cable 6, has a part locked in the notch 20 by the screw 14 and, beyond this part, a free strand 19 which is here bent at an angle straight and brought in a direction parallel to the axis of the cable 6.
  • the free strand 19 of the cable 3 serves here as a connecting element (replacing the braid 4 of the first embodiment).
  • a terminal 18 to be crimped or screwed is provided at the end of the free strand 19 of the cable 3.
  • the loop formed by this cable 3 is engaged in a groove 21, hollowed out in the insulating outer sheath 16 of the cable 6 and reaching the protective screen 7 of this cable 6.
  • FIGS. 6 and 7 show a third embodiment, which is different from the previous ones by the constitution of the means of controlled mechanical tensioning of the part of the flexible cable 3 embracing the cable 6.
  • the body 2 of the connector 1 here comprises a smooth hole 8A receiving a sleeve 10A which is smooth on the outside and internally threaded, rotatably mounted but axially immobilized on the body 2, the sleeve 10A having for this purpose an annular groove 26 cooperating with a complementary part belonging to the body 2.
  • This socket 10A is provided with a fusible operating head 12A allowing controlled mechanical tensioning.
  • the end of the cable 3 is provided with a driver 13a, produced in the form of an externally threaded ring, and secured to this end.
  • the driver 13A takes place inside the socket 10A, the external thread of the driver 13A being complementary to the internal thread of the socket 10A.
  • the driver 13A Before tightening, as shown in Figure 6, the driver 13A is located towards the end of the sleeve 10A remote from the operating head 12A. Manual actuation of this operating head 12A, rotating the sleeve 10A, causes it to be screwed onto the driver 13A and, consequently, an advance of the driver 13A in the direction of said operating head 12A, until it is tightened desired - see Figure 7 showing the configuration obtained at the end of controlled mechanical tensioning of the cable 3 after rupture of the fuse head.
  • an anti-vibration O-ring 27 can here be mounted and compressed between the operating head 12A of the socket 10A and the inlet of the smooth hole 8A of the body 2.
  • the method of implementing the device described above comprises, in a first step, the digging of the groove 21 in the insulating outer sheath 16 of the cable 6.
  • the digging of this groove 21 is possible at using a material consisting of a cord 22, or other flexible, filiform member of the same kind, the two ends of which are advantageously provided with respective grips 23 and 24.
  • the cord 22 is brought so as to encircle the cable 6 , the two free strands formed by the end regions of this cord 22 crossing each other.
  • a reciprocating movement is imparted to the rope 22, along the arrow F, by the operator grasping this rope by its ends, in particular by the two handles 23 and 24.
  • the rope 22 gradually digs, by effect mechanical and / or thermal, in the insulating outer sheath 16 of the cable 6, a groove 21 which extends over an arc of a circle less than one complete revolution, covering for example around 300 °, an integral zone 25 remaining between the two ends of groove 21 - see figure 9.
  • the operator removes the cord 22 and proceeds to put the connector 1 in place, applying the body 2 of the connector to the zone 25 and engaging the cable 3 in the groove 21, to form a loop before returning to the body 2 where the blocking of the cable 3 is carried out by means of the screw 14 with fuse head 15 forming torque limiter. Then, the controlled mechanical tensioning of the loop is carried out manually on the screen 7 by tightening the screw 10, the fuse head 12 of which also plays the role of torque limiter.
  • the electrical connection is made with an external element either using the free strand 19 of the cable 3, or using the braid 4.
  • connection device can be placed at the end of the cable, at an intermediate point of a cable without accessibility at the ends, around a cable accessible only over a short length, or over a cable accessible only at a reduced angle.
  • the connection device in question is also adaptable to cables for transporting electrical energy, to cables for video networks, to coaxial cables, as well as insulated sheaths or guides, the constitution and the geometry of these cables or the like can be diverse.
  • the same connection device is adaptable, without modification, to cables of various diameters, by forming with the cable a loop of varying length embracing the cable.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Multi-Conductor Connections (AREA)
  • Cable Accessories (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
EP95420043A 1994-02-24 1995-02-22 Elektrische Verbinderanordnung für leitende Kabelabschirmung und Verfahren zu ihrer Ausführung Expired - Lifetime EP0669677B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9402359 1994-02-24
FR9402359A FR2716579B1 (fr) 1994-02-24 1994-02-24 Dispositif de connexion électrique pour écrans de câbles conducteurs, et procédé pour sa mise en Óoeuvre.

Publications (2)

Publication Number Publication Date
EP0669677A1 true EP0669677A1 (de) 1995-08-30
EP0669677B1 EP0669677B1 (de) 1998-07-08

Family

ID=9460565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95420043A Expired - Lifetime EP0669677B1 (de) 1994-02-24 1995-02-22 Elektrische Verbinderanordnung für leitende Kabelabschirmung und Verfahren zu ihrer Ausführung

Country Status (9)

Country Link
US (1) US5634827A (de)
EP (1) EP0669677B1 (de)
JP (1) JPH07263108A (de)
AT (1) ATE168224T1 (de)
CA (1) CA2143270C (de)
DE (1) DE69503274T2 (de)
ES (1) ES2119340T3 (de)
FR (1) FR2716579B1 (de)
ZA (1) ZA951243B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29711142U1 (de) * 1997-06-26 1997-08-21 G.A. Kettner Gmbh, 65606 Villmar Vorrichtung zur Isolierung eines Kabelanschlusses

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6431885B1 (en) 2000-06-27 2002-08-13 X-Com Systems, Inc. Electrical component grounding device, electrical system grounding and support apparatus, and antenna component grounding system
GB201102405D0 (en) * 2011-02-11 2011-03-30 Sicame Electrical Dev Ltd Connector of electrical conductors
AU2012319106A1 (en) 2011-10-07 2014-04-17 Titeflex Corporation Bushings, sealing devices, tubing, and methods of installing tubing
US9541225B2 (en) 2013-05-09 2017-01-10 Titeflex Corporation Bushings, sealing devices, tubing, and methods of installing tubing
EP3587884B1 (de) * 2018-06-22 2021-10-27 Crompton Technology Group Limited Anordnung umfassend einen abbindedraht und ein rohr und verfahren um einen abbindedraht an ein rohr anzubringen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1935085A (en) * 1932-11-22 1933-11-14 James E Euwer Ground clamp
GB926677A (en) * 1960-02-12 1963-05-22 Hepworth Iron Co Ltd Improvements in or relating to bonds for electric cables
US4051323A (en) * 1976-10-14 1977-09-27 Thomas & Betts Corporation Connector for coupling a ground conductor to the shield of a shielded conductor
GB2245772A (en) * 1990-07-06 1992-01-08 Niglon Limited Electrical connectors
US5131856A (en) * 1991-11-15 1992-07-21 Electric Motion Company, Incorporated Universal ground clamp

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2913699A (en) * 1955-01-10 1959-11-17 Thomas Associates Electrical bonding clamp
GB876348A (en) * 1959-02-03 1961-08-30 Ass Elect Ind Improvements in or relating to cable connectors
US4623204A (en) * 1984-05-17 1986-11-18 Auclair William T Universal ground clamp
US4875864A (en) * 1989-03-13 1989-10-24 Campbell Marvin J Ground clamp for coaxial cable junction block

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1935085A (en) * 1932-11-22 1933-11-14 James E Euwer Ground clamp
GB926677A (en) * 1960-02-12 1963-05-22 Hepworth Iron Co Ltd Improvements in or relating to bonds for electric cables
US4051323A (en) * 1976-10-14 1977-09-27 Thomas & Betts Corporation Connector for coupling a ground conductor to the shield of a shielded conductor
GB2245772A (en) * 1990-07-06 1992-01-08 Niglon Limited Electrical connectors
US5131856A (en) * 1991-11-15 1992-07-21 Electric Motion Company, Incorporated Universal ground clamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29711142U1 (de) * 1997-06-26 1997-08-21 G.A. Kettner Gmbh, 65606 Villmar Vorrichtung zur Isolierung eines Kabelanschlusses

Also Published As

Publication number Publication date
DE69503274T2 (de) 1999-05-27
EP0669677B1 (de) 1998-07-08
FR2716579B1 (fr) 1996-04-12
CA2143270C (fr) 2004-02-03
JPH07263108A (ja) 1995-10-13
ES2119340T3 (es) 1998-10-01
US5634827A (en) 1997-06-03
ATE168224T1 (de) 1998-07-15
DE69503274D1 (de) 1998-08-13
ZA951243B (en) 1995-10-19
FR2716579A1 (fr) 1995-08-25
CA2143270A1 (fr) 1995-08-25

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