EP0051276A1 - Ligature préformée pour serrer un câble dans la gorge latérale circulaire d'un isolateur rigide - Google Patents

Ligature préformée pour serrer un câble dans la gorge latérale circulaire d'un isolateur rigide Download PDF

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Publication number
EP0051276A1
EP0051276A1 EP81109204A EP81109204A EP0051276A1 EP 0051276 A1 EP0051276 A1 EP 0051276A1 EP 81109204 A EP81109204 A EP 81109204A EP 81109204 A EP81109204 A EP 81109204A EP 0051276 A1 EP0051276 A1 EP 0051276A1
Authority
EP
European Patent Office
Prior art keywords
ligature
cable
ligature according
groove
locking
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Withdrawn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
EP81109204A
Other languages
German (de)
English (en)
French (fr)
Inventor
Lucien Gamet
Michel Willem
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.)
Ceraver SA
Original Assignee
Ceraver 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 Ceraver SA filed Critical Ceraver SA
Publication of EP0051276A1 publication Critical patent/EP0051276A1/fr
Withdrawn legal-status Critical Current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
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/20—Pin insulators
    • H01B17/22—Fastening of conductors to insulator

Definitions

  • the invention relates to a preformed ligature for clamping a cable in the circular lateral groove of a rigid insulator.
  • ligatures of the "two-wire cross-tie" type are surrounded in the groove of the isolator and then on the cable so as to block the latter in the groove of the isolator.
  • the present invention makes it possible to avoid these drawbacks and relates to a preformed ligature for clamping a cable in the circular lateral groove of a rigid insulator, said ligature being curved in the middle, forming two symmetrical branches having first, respectively, following two arcs of a circle whose radius of curvature is substantially that of the bottom of said groove, the ends of said branches constituting respectively two clips for said cable, characterized in that said middle of the ligature has an elastic fold constituting a locking zone unlocking enclosed in a captive sleeve forming locking-unlocking means.
  • said ligature is folded hairpin at the locking-unlocking area.
  • the ligature is folded so as to substantially form a W at the locking-unlocking zone.
  • the fold is preferably such that the central top of the W is rounded and in contact with the bottom of the throat of the insulator.
  • the captive sleeve enclosing the locking-unlocking zone is capable of translational movement in the plane of the groove and in a direction substantially perpendicular to the cable.
  • This sleeve preferably has two flat faces connected internally by rivets or the like, said rivets being inside the folds of the locking-unlocking zone.
  • two bosses internal to the captive sleeve are provided, cooperating with two complementary bosses presented by the branches of the ligature in the vicinity of the groove.
  • the ligature according to the invention comprises a ring around which said branches are folded before forming said attachments.
  • the ligature can be made up of several metallic wires joined together, the two ends of the ligature being spiraled.
  • the ligature can also be formed of an elastic metal ribbon, the ends of which form a cradle for the cable and can cooperate with a wedge or with a preformed or non-formed wire to immobilize this cable.
  • This ligature is symmetrical with respect to a median section plane orthogonal to the insulator 1 and to the cable 5. It is formed of a few metallic wires secured to each other. It has in its central part a fold 6 having a certain elasticity enclosed in a sleeve 7 which will be described in detail below. It then comprises two branches defining two arcs of a circle 8 and 9 whose radius of curvature is substantially that of the bottom of the groove 4, and which are extended by two spiral fasteners 10 and 11.
  • the two branches are folded around a metal ring 12, in the intermediate zone between the arc of a circle and the spiral attachment corresponding.
  • This flat ring in the form of a buttonhole, substantially follows the curvature of the groove 4. It can be metallic or insulating. It can have a certain elasticity.
  • the middle zone of the ligature defines a so-called locking-unlocking zone and cooperates with the sleeve 7 to allow the blocking of the ligature (FIG. 2A) or its release (FIG. 2B).
  • the sleeve 7 is in the form of a flattened cylinder, its two opposite faces being connected by a rivet 15 or the like, located inside the fold 6 and thus making it captive.
  • the sleeve 7 In the locked position (FIG. 2A) the sleeve 7 is locked against the head 3 of the insulator 1 and compresses the fold 6 so as to define a constriction 16 followed by a boss 17 preventing it from any translational movement moving it away from the insulator head.
  • a translation is carried out, marked by the arrow 20, using a tool; it may be a pinch which is engaged in an opening 14 provided in the sleeve; 1 throttle 16 disappears, the two arcs 8 and 9 move apart and can be released from the bottom of the groove 4.
  • the ligature-cable assembly can then be removed from the head of the insulator, preferably by using a tool essentially consisting of two hooks joined by a transverse bar mounted at the end of a pole.
  • FIGS. 3A, 3B, 3C illustrate a particularly advantageous alternative embodiment of the locking-unlocking zone of a ligature according to the invention. Elements similar to those of FIGS. 2A and 2B have been indicated by the same references.
  • the fold of the ligature has substantially the shape of a W whose branches 30, 31, 32, 33 and the vertex 34 have been referenced.
  • the branches 30 and 33 are connected respectively to the circular arcs 8 and 9 by two bosses 22 and 21.
  • the locking sleeve 27 illustrated in section in FIG. 3C comprises two complementary internal bosses 24, 25 determining a frank locking position.
  • Two rivets 28 and 29 are engaged respectively between the branches 30, 31 on the one hand and 32, 33 on the other hand.
  • the hole provided in the sleeve 27 has been identified 26 to ensure the back and forth translation movement of this sleeve.
  • the sleeve 27 of FIG. 3C has a lower face notched between the two rivets 28 and 29; this facilitates its manufacture but does not in any way modify its function.
  • the variant which has just been described has a very significant advantage, in particular when the wind urges the cable to leave the groove of the insulator. It is found that such an effort has the first effect of applying the vertex 34 of the W more narrowly against the bottom of the throat, and the second effect of spreading the branches apart from one another 30 and 31 and on the other hand the branches 32 and 33. All these effects contribute to the fact that the sleeve 27 is held firmly in place.
  • an operator can, preferably using a tool, release the ligature and the associated cable from the head of the insulator, once the sleeve 27 has been pulled (FIG. 3B ).
  • FIGS 4 and 5 show another alternative embodiment of a ligature according to the invention.
  • This ligature may include in its central part a locking-unlocking zone 40 with associated sleeve similar to one of those which have been described above. It differs from the previous variants by the fact that it essentially consists of an elastic metallic ribbon forming two arcs of a circle, matching the curvature of the groove 4 of the insulator; one of these arcs is referenced 41. The ends 43 and 44 are folded around a ring 45 in the buttonhole also conforming to the curvature of the groove 4.
  • the two ends 43 and 44 form cradles for the cable 5.
  • the cable is also held by a shim 46 and stirrups 47 and 48.
  • the shim and the stirrups are replaced by one or more wires metallic, preformed or not, cooperating with the ends 43 and 44 to immobilize the cable 5.
  • the cable is better retained in the groove of the insulator when it is stressed upwards than with the conventional preformed fastener which, due to its rigidity, forms an ellipse around the bottom of the groove and not a circle.
  • the tightening of the ligature in the groove of the isolator is independent of the operator; just check with the binoculars, for example, that the sleeve has been fully pushed back.
  • a ligature according to the invention is economical when it is carried out in large series.
  • the invention is not limited to the embodiments which have just been described.
  • the ligature according to the invention can no longer be made of metal, but of material having equivalent mechanical characteristics, in particular, elasticity, resistance to bending and to shearing; by way of example, fibers embedded in a resin can be used.

Landscapes

  • Insulators (AREA)
  • Surgical Instruments (AREA)
EP81109204A 1980-11-04 1981-10-29 Ligature préformée pour serrer un câble dans la gorge latérale circulaire d'un isolateur rigide Withdrawn EP0051276A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8023512A FR2493585A1 (fr) 1980-11-04 1980-11-04 Ligature preformee pour la retenue d'un conducteur dans la gorge d'un isolateur rigide
FR8023512 1980-11-04

Publications (1)

Publication Number Publication Date
EP0051276A1 true EP0051276A1 (fr) 1982-05-12

Family

ID=9247652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109204A Withdrawn EP0051276A1 (fr) 1980-11-04 1981-10-29 Ligature préformée pour serrer un câble dans la gorge latérale circulaire d'un isolateur rigide

Country Status (3)

Country Link
EP (1) EP0051276A1 (enrdf_load_stackoverflow)
BR (1) BR8107117A (enrdf_load_stackoverflow)
FR (1) FR2493585A1 (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071952A1 (fr) * 1981-08-05 1983-02-16 CERAVER Société anonyme dite: Ligature pour la retenue d'un conducteur électrique dans la gorge latérale d'un isolateur rigide
EP0090881A1 (fr) * 1982-04-06 1983-10-12 CERAVER Société anonyme dite: Ligature pour la retenue d'un câble électrique dans la gorge supérieure d'un isolateur rigide
US7674982B2 (en) 2008-01-29 2010-03-09 Bmc Innovation Inc. Electric cable and insulator self-locking system, and method of installation thereof
USD894125S1 (en) * 2019-05-20 2020-08-25 Electrical Materials Company Insulator pin for overhead electrical lines
US11004579B2 (en) 2019-05-20 2021-05-11 Electrical Materials Company Breakaway pin for overhead electrical lines

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE232403C (enrdf_load_stackoverflow) *
FR701473A (fr) * 1930-08-30 1931-03-17 Agrafes de fixation des conducteurs électriques de tous diamètres sur des isolateurs d'un type quelconque
FR41450E (fr) * 1932-03-01 1933-01-10 Agrafes de fixation des conducteurs électriques de tous diamètres sur des isolateurs d'un type quelconque
DE654208C (de) * 1935-11-14 1937-12-14 Gerhard Opitz Buegelbund zur Befestigung von Freileitungen an Isolatoren mittels Bindedrahts
FR899889A (fr) * 1942-08-13 1945-06-13 Fides Gmbh Dispositif de fixation de conducteurs électriques aux isolateurs-supports forme cloce
DE1912219A1 (de) * 1968-03-25 1969-10-02 Preformed Line Products Co Vorrichtung zur Befestigung linearer Elemente,wie insbesondere Kabel oder elektrische Leitungen u.dgl.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE232403C (enrdf_load_stackoverflow) *
FR701473A (fr) * 1930-08-30 1931-03-17 Agrafes de fixation des conducteurs électriques de tous diamètres sur des isolateurs d'un type quelconque
FR41450E (fr) * 1932-03-01 1933-01-10 Agrafes de fixation des conducteurs électriques de tous diamètres sur des isolateurs d'un type quelconque
DE654208C (de) * 1935-11-14 1937-12-14 Gerhard Opitz Buegelbund zur Befestigung von Freileitungen an Isolatoren mittels Bindedrahts
FR899889A (fr) * 1942-08-13 1945-06-13 Fides Gmbh Dispositif de fixation de conducteurs électriques aux isolateurs-supports forme cloce
DE1912219A1 (de) * 1968-03-25 1969-10-02 Preformed Line Products Co Vorrichtung zur Befestigung linearer Elemente,wie insbesondere Kabel oder elektrische Leitungen u.dgl.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071952A1 (fr) * 1981-08-05 1983-02-16 CERAVER Société anonyme dite: Ligature pour la retenue d'un conducteur électrique dans la gorge latérale d'un isolateur rigide
EP0090881A1 (fr) * 1982-04-06 1983-10-12 CERAVER Société anonyme dite: Ligature pour la retenue d'un câble électrique dans la gorge supérieure d'un isolateur rigide
US7674982B2 (en) 2008-01-29 2010-03-09 Bmc Innovation Inc. Electric cable and insulator self-locking system, and method of installation thereof
USD894125S1 (en) * 2019-05-20 2020-08-25 Electrical Materials Company Insulator pin for overhead electrical lines
US11004579B2 (en) 2019-05-20 2021-05-11 Electrical Materials Company Breakaway pin for overhead electrical lines

Also Published As

Publication number Publication date
BR8107117A (pt) 1982-07-20
FR2493585A1 (fr) 1982-05-07
FR2493585B1 (enrdf_load_stackoverflow) 1983-09-09

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19830413

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GAMET, LUCIEN

Inventor name: WILLEM, MICHEL