EP0669677B1 - Dispositif de connexion électrique pour écrans de câbles conducteurs, et procédé pour sa mise en oeuvre - Google Patents

Dispositif de connexion électrique pour écrans de câbles conducteurs, et procédé pour sa mise en oeuvre Download PDF

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Publication number
EP0669677B1
EP0669677B1 EP95420043A EP95420043A EP0669677B1 EP 0669677 B1 EP0669677 B1 EP 0669677B1 EP 95420043 A EP95420043 A EP 95420043A EP 95420043 A EP95420043 A EP 95420043A EP 0669677 B1 EP0669677 B1 EP 0669677B1
Authority
EP
European Patent Office
Prior art keywords
cable
flexible
connector
electrical connection
conducting element
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.)
Expired - Lifetime
Application number
EP95420043A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0669677A1 (fr
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/fr
Application granted granted Critical
Publication of EP0669677B1 publication Critical patent/EP0669677B1/fr
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 conductive cables, in particular telecommunication cables.
  • This invention applies more particularly to cables provided with a very low protection screen thickness, consisting of a metallic layer, in particular of aluminum, covered with a insulating protective layer, such as polyethylene.
  • a screen with its device connection protects the cable it surrounds against radio interference and electromagnetic, and ensure grounding or grounding, for example by connecting a cable, belonging to an installation, to a structure receiving this installation, or ensure continuity between two screens.
  • connection devices for earthing comprising a body connector rigid capable of being supported in a zone of the periphery of a cylindrical object, and an element flexible filiform conductor provided for entangling said cylindrical object, means being provided on these devices for securing one end of the flexible conductive element to the body of the connector, and to immobilize, with controlled mechanical tensioning, the part of this flexible conductive element embracing said cylindrical object.
  • these connection devices are only intended for earthing metallic objects rigid, in particular of tubes, the flexible conducting element in the form of a small cable or tape being applied and clamped on the exterior surface of the rigid object such as tube.
  • the invention aims to avoid these drawbacks by providing a device allowing to make an electrical connection with the screen at any point along the cable length, 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 invention essentially relates to a connection device electric for screens of conductive cables of the type concerned, the device being of the type comprising a rigid body connector capable of being supported in a region of the periphery of the cable, and a flexible filiform conductive element intended to entrap the cable, means being provided for securing one end of the flexible filiform conductive element to the connector body, and for a immobilization with controlled mechanical tensioning of the part of this element flexible conductor embracing the cable, the device being characterized in that the element flexible filiform conductor is produced in the form of a conductive braid or a flexible cable, forming a loop intended to be positioned in a groove transverse hollowed out in the outer insulating sheath of the cable over at least a fraction of its circumference, and reaching the screen, in that one end of the filiform conducting element flexible is secured to the connector body by means of a threaded tensioning member mechanically controlled, axially traversed by this end and in that, the body of the
  • the flexible conductive element thus forms a loop which takes place in a groove cut into the thickness of the outer insulating sheath of the cable and covering preferably an arc less than a full circumference, while the rigid body of the connector is supported on the part of the outer insulating sheath which has remained intact.
  • the threaded tensioning member mechanically controlled is an internally threaded sleeve, rotatably mounted but immobilized axially on the connector body, while the end of the element flexible conductor is provided with an externally threaded driver cooperating with the internal thread of the sleeve.
  • the mechanical tensioning screw and the locking screw are fuse head screws, allowing easy control of their tightening torque, therefore control of the tension of the flexible conducting element embracing the cable, and of 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 braid conductive, one end of which is integral with the body of this connector and intended to ensure 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 element flexible, uncut, thread-like conductor is used to directly bond electrical, such as grounding 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, for crimping or to be fixed by any other means, such as screwing, for example on a ground plane.
  • connection device object of the invention can still include sealing and insulating means surrounding the connector and the cable.
  • the invention also relates to a method of making a connection electric for screens of conductive cables of the type concerned, with implementation of the connection device defined above.
  • the bleeding is carried out on a fraction of the circumference complete of the cable, for example in an arc of approximately 300 °, so as to leave remain a part of integral outer sheath on which is applied the body of the connector.
  • the bleeding is dug 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 bleeding is thus easily formed, at the desired point on the cable, by a mechanical abrasion effect or by an effect thermal (local fusion of the cable insulating sheath), or by the combination of these two effects.
  • the operator, printing the rope back and forth preferably thanks to 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 chased on the screen without limit, because the risk of damage to the screen is here practically zero, whatever the nature of this screen.
  • the groove formed in the insulating sheath can immediately receive the conductive element flexible connector, then brought to the cable.
  • the establishment of the connector does not require engaging the conductive element around the cable by one end of it.
  • the connector can be installed on a cable without accessibility at the ends, the flexible filiform conductive element being wound, on a lathe, around the cable, before being brought back and blocked on the connector body.
  • the device comprises a connector, generally designated by the reference 1, in which there is mainly a rigid body 2 made of electrically material conductive, such as a copper alloy, and a flexible filiform conductive element 3, is having like a conductive braid or a flexible cable, for example of steel stainless.
  • 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, designed to take support in a zone of the periphery of a cable 6 with protective screen 7.
  • a threaded hole 8 and a channel 9 which one and the other 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 takes pressing on an internal retaining shoulder formed in the axial bore 11 of the screw 10.
  • the flexible cable 3 is provided to form, in the position of use of the connector 1, a loop embracing the cable 6, the strand of cable 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 to 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 of its controlled mechanical tensioning around the cable 6 by tightening the screw 10, ensures 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.
  • Braid 4 which can be made of copper like a bare braid, or coated with a like a small cable, here provides the desired electrical connection between connector 1 and a external element not shown, such as ground network.
  • the first end of the braid 4 is crimped at 17 onto the rigid body 2 of the connector 1.
  • the other end, initially free, braid 4 is provided with a terminal 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 situated beyond the body 2 of the connector 1, can here be cut as close as possible to the body 2 and eliminated, as illustrated in FIG. 3.
  • FIGS. 4 and 5 represent a second embodiment of the invention, in which the rigid body 2 of the connector 1 comprises, in addition to a solid part with hole threaded 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 screw blocking 14 with fuse head 15, of 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 a right angle 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 for 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 outer sheath insulating 16 of the cable 6 and reaching the protective screen 7 of this cable 6.
  • Figures 6 and 7 show a third embodiment, which is different from the previous ones by the constitution of the mechanical tensioning means controlled part of the flexible cable 3 embracing the cable 6.
  • the body 2 of the connector 1 here has a smooth hole 8A receiving a socket 10A smooth on the outside and internally threaded, mounted revolving but immobilized axially on the body 2, the sleeve 10A comprising for this purpose an annular groove 26 cooperating with a complementary part belonging to the body 2.
  • This socket 10A is provided with a 12A fuse operating head allowing mechanical tensioning controlled.
  • the end of the cable 3 is provided with a driver 13a, produced in the form an externally threaded ring, and secured to this end.
  • Coach 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 coach 13A Before tightening, as shown in Figure 6, the coach 13A is located towards the end of the socket 10A remote from the operating head 12A. Manual operation of this operating head 12A, rotating the socket 10A, causes it to be screwed onto the coach 13A and, consequently, an advance of the coach 13A in the direction of said operating head 12A, until desired tightening - see Figure 7 showing the configuration obtained at the end of controlled mechanical tensioning of the cable 3 after breaking 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 entry 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 can be carried out using of a material constituted by a cord 22, or other flexible filiform member of the same kind, both ends of which are advantageously provided with respective grips 23 and 24.
  • the rope 22 is brought so as to encircle the cable 6, the two free strands formed by the end regions of this intersecting cord 22.
  • a back and forth movement is printed on cord 22, along arrow F, by the operator entering this cord by its ends, in particular by the two handles 23 and 24.
  • the cord 22 hollow gradually, by mechanical and / or thermal effect, 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 the groove 21 - see figure 9.
  • the operator removes the cord 22 and proceeds with the setting in place of connector 1, applying body 2 of connector to zone 25 and engaging the cable 3 in the groove 21, to form a loop before returning to the body 2 where the locking of the cable 3 is effected by means of the screw 14 with a fuse head 15 forming torque limiter. Then, there is manual mechanical tensioning controlled loop on the screen 7 by tightening the screw 10, whose fuse head 12 plays also the role of torque limiter.
  • the electrical connection is made with an external element either at using the free end 19 of the cable 3, or using the braid 4.
  • connection device can be placed at the end of the cable, at a point through a cable with no accessibility at the ends, around an accessible cable only on a short length, or on an accessible cable only on a reduced angle.
  • the connection device in question is also adaptable to cables for transporting electrical energy, for video network cables, for coaxial cables, as well as insulated sheaths or guides, the constitution and geometry of these cables or analogs can be various.
  • the same connection device is adaptable, without modification, to cables of various diameters, forming with the cable a loop of varying length wrapping the cable.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Cable Accessories (AREA)
  • Multi-Conductor Connections (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
EP95420043A 1994-02-24 1995-02-22 Dispositif de connexion électrique pour écrans de câbles conducteurs, et procédé pour sa mise en oeuvre Expired - Lifetime EP0669677B1 (fr)

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 EP0669677A1 (fr) 1995-08-30
EP0669677B1 true EP0669677B1 (fr) 1998-07-08

Family

ID=9460565

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95420043A Expired - Lifetime EP0669677B1 (fr) 1994-02-24 1995-02-22 Dispositif de connexion électrique pour écrans de câbles conducteurs, et procédé pour sa mise en oeuvre

Country Status (9)

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

Families Citing this family (6)

* 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
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
WO2013052200A1 (en) 2011-10-07 2013-04-11 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 (en) * 2018-06-22 2021-10-27 Crompton Technology Group Limited Assembly comprising a bonding wire and a pipe and method of attaching a bonding wire to a pipe

Family Cites Families (9)

* 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
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
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
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
GB2245772B (en) * 1990-07-06 1994-11-23 Niglon Limited Electrical connectors
US5131856A (en) * 1991-11-15 1992-07-21 Electric Motion Company, Incorporated Universal ground clamp

Also Published As

Publication number Publication date
EP0669677A1 (fr) 1995-08-30
DE69503274D1 (de) 1998-08-13
DE69503274T2 (de) 1999-05-27
US5634827A (en) 1997-06-03
ZA951243B (en) 1995-10-19
ATE168224T1 (de) 1998-07-15
CA2143270A1 (fr) 1995-08-25
FR2716579A1 (fr) 1995-08-25
JPH07263108A (ja) 1995-10-13
FR2716579B1 (fr) 1996-04-12
ES2119340T3 (es) 1998-10-01
CA2143270C (fr) 2004-02-03

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