EP0020188B1 - Connecteur électrique pour un câble coaxial et méthode pour assembler ce connecteur à un câble coaxial - Google Patents

Connecteur électrique pour un câble coaxial et méthode pour assembler ce connecteur à un câble coaxial Download PDF

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Publication number
EP0020188B1
EP0020188B1 EP19800400458 EP80400458A EP0020188B1 EP 0020188 B1 EP0020188 B1 EP 0020188B1 EP 19800400458 EP19800400458 EP 19800400458 EP 80400458 A EP80400458 A EP 80400458A EP 0020188 B1 EP0020188 B1 EP 0020188B1
Authority
EP
European Patent Office
Prior art keywords
clamp member
braid
conductor
insulating layer
nut
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
Application number
EP19800400458
Other languages
German (de)
English (en)
Other versions
EP0020188A3 (en
EP0020188A2 (fr
Inventor
Donald Hollenbeck Gould
James Joseph Karol
Allan Black Kirby
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.)
Bendix Corp
Original Assignee
Bendix Corp
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 Bendix Corp filed Critical Bendix Corp
Publication of EP0020188A2 publication Critical patent/EP0020188A2/fr
Publication of EP0020188A3 publication Critical patent/EP0020188A3/en
Application granted granted Critical
Publication of EP0020188B1 publication Critical patent/EP0020188B1/fr
Expired 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
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2103/00—Two poles

Definitions

  • This invention relates to an electrical connector for a coaxial cable terminating at a free end and including a central conductor, an insulating layer surrounding the central conductor, a braid conductor surrounding the insulating layer, and a protective sheath surrounding the braid conductor, this electrical conductor comprising a terminal body, a clamp member disposed within the terminal body and a nut assembling the clamp member to the terminal body, the clamp member including a tapered surface, and a bore for receiving the central conductor and the insulating layer and extending between a forward face and a rear face.
  • the prior art coaxial terminations lack a design which has few parts, is easy and quick to assemble at low cost, and yet resists outward axial movement of the clamp member, even before the nut and body are assembled.
  • the present invention overcomes the disadvantages and limitations of the prior art arrangements by providing an electrical connector for a coaxial cable terminating at a free end and including a central conductor, an insulating layer surrounding the central conductor, a braid conductor surrounding the insulating layer, and a protective sheath surrounding the braid conductor, said electrical connector comprising a terminal body, a clamp member disposed within the terminal body and a nut assembling the clamp member to the terminal body, the clamp member including an outer a tapered surface, a bore for receiving the central conductor and the insulating layer and extending between a forward face and a rear face, and a helical groove described by a series of undercuts disposed on the tapered surface such that an edge of each undercut provides a corner surface which engages the braid conductor after -the central conductor and the insulating layer have been received in the bore and the clamp member rotated to draw the tapered surface of said clamp member between the insulating layer and the braid conductor.
  • the electrical connector of the present invention is advantageous in that it provides an arrangement which is easy and quick to assemble, and resists outward movement of the clamp member prior to complete assembly of the connector and cable.
  • the co-axial cable 10 includes a central electrical conductor 12, an outer braid conductor 14, and a layer of di-electric material 16 between the central conductor 12 and the braid conductor 14.
  • An outer jacket 18 surrounds the conductors.
  • the outer jacket 18 and the dielectric material 16 are both made of electrically insulating materials to electrically isolate the conductors 12, 14 from each other and from the environment.
  • the coaxial connector 100 in its preferred embodiment, has three components which are supplied and handled as separate pieces: a forward body 200, an internal clamp member 300 and a rear nut 400.
  • the forward body 200 is of conventional design and includes a mating central contact 210 surrounded by an electrically insulating material 220.
  • An outer electrical contact 230 is disposed outside the insulating material 220, electrically isolated from the central contact 210.
  • the body 200 includes an internal thread 240 at the rear end thereof for coupling to the nut 400.
  • the clamp member 300 includes an electrically conductive body 310 and an insulator 320.
  • the insulator 320 fits within an undercut portion 312 extending rearwardly from the front end of the conductive body.
  • the insulator 320 electrically isolates the exposed portion of the central conductor 12 of the cable and the contact 210 from the body 310.
  • the insulator 320 is retained within the undercut in a known manner (e.g., adhesively or frictionally, through pressing in a member in an interference fit).
  • the nut 400 may be of the type described in U.S. Patent 3,373,243.
  • the nut 400 includes a rear portion 410 which is grasped during installation and an external screw thread 420 located forward of the rear portion 410.
  • the screw thread 420 engages the thread 240 of the body 200 to secure the connector assembly 100 together.
  • the nut 400 includes a central aperture 430 through which the cable 10 extends.
  • the nut 400 also includes steps 440 which provide increasingly larger diameters of the central aperture 430 in the forward region of the nut.
  • steps 440 which provide increasingly larger diameters of the central aperture 430 in the forward region of the nut.
  • Such steps when used in conjunction with a clamp as described in the present design having a frusto-conical surface of increasing diameter, enables the connector 100, when assembled, to retain the cable 10 therein by engaging the jacket 18 and thereby providing resistance to decoupling forces applied on the cable. The engagement occurs between the steps and the frusto-conical surface.
  • FIG. 2 is an enlarged view of the external surface of the clamp body 310 of the present invention.
  • the clamp body 310 has a forward portion 313 of a larger diameter and a rear frusto-conical portion 314.
  • the portion 314 increases in size from a smaller rear end 314a to a larger forward end 314b, where it meets the larger forward portion 313.
  • a helical groove 316 spirals around the frusto-conical portion 314, making several revolutions.
  • a spiral in a form similar to a raised (exposed) screw thread could be used to advantage in the present design, the form claimed is a quicker and less expensive approach which is shown in these drawings, that is, to form or cut a groove 316 into the outer surface, which requires the removal of less material.
  • the formation of the helical groove is advantageously formed on an automatic screw machine.
  • Other methods of fabrication such as stamping and rolling, casting, forging and spinning could also be used to advantage to create the clamp 300 of the present invention. Using such other methods of fabrication may make it easier and less expensive to have exposed threads.
  • the pitch and depth of the helical groove are somewhat a matter of design choice. It has been found that a continuous spiral of 40 pitch, 13/100 mm deep, right handed buttress type thread works to advantage. Lefthanded threads could be substituted and used to advantage in the present design although they would be unconventional and more difficult to install manually, as an operator is accustomed to install a Screw member with right handed threads.
  • the threads on the nut 400 should be of the same type (i.e., right-handed) as on the clamp so that the application of the nut does not tend to uncouple the clamp from the braid.
  • Figure 3 shows a cross sectional view of the clamp body 310 without the insulator.
  • the forward undercut portion 312 for receiving the insulator is shown, as are the enlarged forward portion 313, the helical groove 316 and the frusto-conical tapering portion 314.
  • Figure 4 shows a cross sectional view of the clamp member 300 (with body 310 and insulator 320) being inserted over the "square cut" cable 10.
  • the nut 400 has already been inserted over the cable 10 and is moved to the rear of the forward end of the cable, away from the area of the cable upon which the clamp 300 will be applied.
  • the body 310 of the clamp and the insulator 320 each have a central aperture (311 and 321, respectively).
  • the central aperture 311 of the clamp is large enough to receive the layer of insulation 16 of the cable 10, while the aperture 321 in the insulator is smaller, merely large enough to receive the central conductor 12 therein.
  • the cable 10 has been prepared in a manner which is referred to as a "square cut" in the industry.
  • the square cut preparation has the central conductor 12 extending forwardly of the rest of the cable (outer layers: insulation 16, braid conductor 14, and jacket 18), all of which extend a uniform but lesser, distance forward.
  • the outer rear surface of the clamp 300 has been pressed between the layer of insulation 16 and the braid conductor 14, urging the braid conductor 14 and the jacket radially outward slightly.
  • the helical groove 316 is in contact with the braid conductor 14, and because the braid conductor 14 is being urged radially inward by the surrounding jacket 18, the braid conductor 14 is urged partially into the groove 316.
  • the groove 316 coacts with the braid conductor 14 to draw the body 310 further in, in the nature of a screw being drawn into wood as it rotates.
  • the body 310 is retained by the groove 316 against undesirable axial movement out of the cable 10 because the braid conductor 14 is engaged in the groove 316.
  • Figure 5 shows the clamp 300 when the body 310 fully engages the cable 10.
  • the braid conductor 14 and the jacket 18 extend forwardly on the clamp to the enlarged portion 313 thereof, fully covering the tapering frusto-conical portion 314, with the helical groove 316 being embedded along its length within the braid conductor 14.
  • the insulation layer 16 is well forward within the clamp body in the central aperture thereof.
  • Figure 6 is a cross sectional view showing a portion of the clamp body 310 with the thread or helical groove 316 shown.
  • the helical groove 316 shown here is "U" shaped and has corners 316a, 316b at the meeting of the groove with the external surface.
  • the rear or trailing corner 316b will engage or "bite into” the braid conductor and prevent it from moving rearwardly, even if the cable is pulled rearwardly with respect to the connector.
  • a portion of the braid conductor will be forced into the groove, providing a more reliable and uniform electrical connection between the braid conductor and the connector.
  • grooves and threads could be used-either exposed external threads, discontinuous grooves, or varying shapes of grooves-the threads of the type shown in Figure 6 are the preferred embodiment as they can be formed quite easily on automatic screw machines.
  • the threads could be formed using other techniques.
  • Figures 7 and 8 show alternate embodiments of helical threads 316' and 316", where the threads are "V" shaped. These threads are also formable on automatic screw machines with a slightly different tool.
  • a leading corner 316a' is flatter than the leading corner 316a of Figure 6 to bite into the braid.
  • the "V” is substantially symmetrical with respect to the surface of the body, giving a front corner 316a" and a rear corner 316b" between which the braid is forced. The rear corner 316b" does most of the engagement of the braid in this instance.
  • Figure 9 shows an alternative embodiment of the connector 100 of the present invention.
  • this embodiment has a rear nut 500 of the type shown in U.S. Patent No. 3,634,815.
  • the nut 500 in this embodiment includes a resilient member 510 having a frusto-conical forward bore 512, with sealing members 520, 530 located forward and rearward of the resilient member 510. Since the structure of the nut is of only peripheral concern to the present invention, other nut structures could also be used to advantage.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)

Claims (4)

1. Un connecteur électrique pour un câble coaxial (10) qui se termine à une extrémité libre et qui comprend un conducteur central (12), une couche isolante (16) entourant le conducteur central (12), un conducteur tressé (14) entourant la couche isolante (16) et une gaîne protectrice (18) entourant le conducteur tressé (14), ledit connecteur électrique (100) comprenant un corps terminal (200), un organe de serrage (300) disposé à l'intérieur du corps terminal (200) et un écrou (400) qui assemble l'organe de serrage (300) au corps terminal (200), ledit organe de serrage comprenant une surface extérieure (314) à section décroissante et un alésage pour recevoir le conducteur central (12) et la couche isolante (16) et s'étendant entre une face avant et une face arrière, caractérisé en ce que l'organe de serrage (300) comporte une rainure hélicoidale (316) décrite par une série de creux disposés sur la surface (314) à section décroissante de telle sorte qu'un bord de chaque creux fournit un angle (316a, 316b) qui vient en appui contre le conducteur tressé (14) après que le conducteur central (12) et la couche isolante (16) ont été reçus dans l'alésage et que l'organe de serrage (300) a été tourné pour tirer la surface à section décroissante de l'organe de serrage (300) entre la couche isolante (16) et le conducteur tressé (14).
2. Un connecteur électrique tel que revendiqué dans la revendication 1, caractérisé en ce que la surface externe de l'organe de serrage (300) a une forme générale tronconique avec la plus grande extrémité située vers l'extrémité libre du câble (10).
3. Un connecteur électrique tel que revendiqué dans la revendication 1, dans lequel l'écrou (400) et le corps terminal (200) sont joints par des filetages (420, 240), caractérisé en ce que la rotation de l'écrou (400) pour le fixer au corps terminal (200) est dans une direction appropriée pour solliciter la série de creux de manière à assurer un plus grand accrochage de l'organe de serrage (300) et du conducteur tressé (14).
4. Un procédé d'assemblage du connecteur électrique selon la revendication 1 sur l'extrémité d'un câble coaxial, caractérisé par les étapes qui consistent: à découper la gaîne protectrice, le conducteur tressé et la couche isolante du câble perpendiculairement à l'axe de ce dernier à une longueur sensiblement uniforme plus courte que le conducteur central; à faire glisser l'écrou sur le câble; à insérer le conducteur central et la couche isolante dans l'alésage de l'organe de serrage et une partie de la surface à section décroissante de l'organe de serrage entre la couche isolante et le conducteur tressé; à faire tourner l'organe de serrage dans la direction de la rainure hélicoïdale pour tirer l'organe de serrage progressivement plus profondément à l'intérieur de la tresse jusqu'à ce que la totalité de sa surface à section décroissante soit située à l'intérieur de la tresse; et à assembler l'écrou et le corps terminal par dessus l'organe de serrage pour établir le contact électrique et retenir l'organe de serrage entre eux.
EP19800400458 1979-05-23 1980-04-04 Connecteur électrique pour un câble coaxial et méthode pour assembler ce connecteur à un câble coaxial Expired EP0020188B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US4166779A 1979-05-23 1979-05-23
US41667 1979-05-23

Publications (3)

Publication Number Publication Date
EP0020188A2 EP0020188A2 (fr) 1980-12-10
EP0020188A3 EP0020188A3 (en) 1981-01-14
EP0020188B1 true EP0020188B1 (fr) 1983-02-09

Family

ID=21917707

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800400458 Expired EP0020188B1 (fr) 1979-05-23 1980-04-04 Connecteur électrique pour un câble coaxial et méthode pour assembler ce connecteur à un câble coaxial

Country Status (4)

Country Link
EP (1) EP0020188B1 (fr)
JP (1) JPS55159579A (fr)
CA (1) CA1141834A (fr)
DE (1) DE3061857D1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1145430A (fr) * 1980-06-02 1983-04-26 James J. Karol Methode et dispositif de raccordement pour cable coaxial
EP0140185A3 (fr) * 1983-11-01 1985-07-10 Allied Corporation Dispositif de jonction pour cable coaxial avec connexion de masse et fiche coaxiale d'extrémité
JP2707302B2 (ja) * 1987-01-20 1998-01-28 アンプ インコーポレーテッド タップ形電気コネクタ組立体
US4744775A (en) * 1987-02-12 1988-05-17 Amp Incorporated Electrical tap connector assembly
US4825021A (en) * 1987-02-12 1989-04-25 Amp Incorporated Electrical tap connector assembly
JPH0247781U (fr) * 1988-09-27 1990-04-03
FR2667731B1 (fr) * 1990-10-05 1993-03-26 Itt Composants Instr Connecteur electrique blinde, etanche et isole electriquement.
FR2671434A1 (fr) * 1991-01-04 1992-07-10 Berault Michel Dispositif de connexion electrique pour relier un cable et un appareil.
GB9101685D0 (en) * 1991-01-25 1991-03-06 Ramm Stephen G Outdoor lighting system
US6497587B2 (en) 1996-11-29 2002-12-24 Microproject Di Campani L. & C. S.N.C. Connector coupled by pressure for telecommunications systems
AU737412B2 (en) * 1996-11-29 2001-08-16 Microproject Di Capani L. & C. S.N.C. Arrangement of a sleeve, a coaxial cable, and a female coaxial connector for coaxial connector for telecommunication systems
JP4649213B2 (ja) * 2004-03-08 2011-03-09 株式会社オートネットワーク技術研究所 シールドワイヤーハーネスの製造方法及びシールドケーブルの端末構造
RU210673U1 (ru) * 2021-12-07 2022-04-26 Акционерное общество "Научно-исследовательский институт Приборостроения имени В.В. Тихомирова" Узел заделки экранирующей оплетки кабеля
CN114678717B (zh) * 2022-03-10 2023-09-22 中国航天时代电子有限公司 一种真空大功率低pim射频连接器
CN115332893B (zh) * 2022-10-17 2023-02-28 天津市路灯管理处 一种导线接头机构

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3264602A (en) * 1964-03-13 1966-08-02 Automatic Metal Products Corp Electrical connectors for coaxial cables
US3373243A (en) * 1966-06-06 1968-03-12 Bendix Corp Electrical multiconductor cable connecting assembly
DE2159867A1 (de) * 1971-12-02 1973-06-07 Spinner Georg Koaxialstecker fuer koaxialkabel mit volldielektrikum
IT998613B (it) * 1973-09-14 1976-02-20 Sits Soc It Telecom Siemens Connettore per collegamenti provvi sori di tipo volante tra un cavo coassiale rigido e un cavo coassia le flessibile
US4070751A (en) * 1977-01-12 1978-01-31 Amp Incorporated Method of making a coaxial connector
US4135776A (en) * 1977-01-28 1979-01-23 E. F. Johnson Company Solderless coaxial cable connector

Also Published As

Publication number Publication date
CA1141834A (fr) 1983-02-22
DE3061857D1 (en) 1983-03-17
EP0020188A3 (en) 1981-01-14
EP0020188A2 (fr) 1980-12-10
JPS55159579A (en) 1980-12-11

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