EP0463824A1 - Kabelabgriffverbinder - Google Patents

Kabelabgriffverbinder Download PDF

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Publication number
EP0463824A1
EP0463824A1 EP91305649A EP91305649A EP0463824A1 EP 0463824 A1 EP0463824 A1 EP 0463824A1 EP 91305649 A EP91305649 A EP 91305649A EP 91305649 A EP91305649 A EP 91305649A EP 0463824 A1 EP0463824 A1 EP 0463824A1
Authority
EP
European Patent Office
Prior art keywords
contact
cable
outer casing
hollow outer
housing
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Withdrawn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
EP91305649A
Other languages
English (en)
French (fr)
Inventor
Davd King Mcgavin
Richard Sheppard
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.)
Amphenol Corp
Original Assignee
Amphenol 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 Amphenol Corp filed Critical Amphenol Corp
Publication of EP0463824A1 publication Critical patent/EP0463824A1/de
Withdrawn legal-status Critical Current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
    • H01R9/053—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables using contact members penetrating insulation
    • 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
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2404—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation
    • H01R4/2406—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation having needles or pins

Definitions

  • the present invention relates to electrical connectors and in particular to connectors having a contact probe which penetrates the outer layers of a cable to make electrical contact with a central conductor.
  • the present invention has particular application when used with coaxial cables, to provide an electrical tap connection to the central conductor thereof, although it is not limited to such use.
  • a particular problem associated with tapping connectors is that of preventing the probe contact from becoming dirty as it is driven through the outer layers of a cable prior to making contact with the central conductor. Dirt collected on the probe contact surface can result in a poor electrical connection. between the probe and conductor.
  • the problem is particularly acute in data communication networks using coaxial cable.
  • the earthed outer shield of the cable must not be allowed to contact either the central conductor or the probe of the tapping connector.
  • Many coaxial cables have an outer shield of braided copper wire and, as the probe is forced through the shield, strands of the copper wire may be carried along with the probe and into contact with the central conductor.
  • a spring-biased probe contact is rotated as it is driven through the outer layers of a coaxial cable to "wipe" the probe contact surface in order to prevent the build up of debris thereupon.
  • the outer surface of the probe contact is provided with a self-tapping screw thread such that the probe threads its way through the outer layers of the cable rather than being pushed through.
  • the probe contact of the second embodiment is again spring-biased and, as it is rotated to screw it into the cable, the probe and thread surfaces are "wiped” to prevent the build up of debris.
  • those of EP-A-0109229 are in the form of a dielectric body with a metal tip.
  • the probes In order to prevent these probes picking up debris or dragging the outer layers of the cable with them as they are inserted, the probes should be manufactured with surfaces as smooth as possible. This however requires great precision and care in manufacture.
  • an electrical connector comprising a connector housing, adapted to receive and constrain a cable portion, and a contact assembly, the contact assembly comprising a hollow outer casing of non-conductive material movable relative to the connector housing to penetrate at least the outer covering of a cable portion constrained by the housing, and a contact of conductive material mounted within the hollow outer casing and movable lengthwise within it, the hollow outer casing having a penetrable end portion at least substantially closing the end thereof, and the contact being movable within the hollow outer casing to break through the said end portion, when the hollow outer casing has penetrated at least the outer covering of a cable constrained by the housing, to make electrical contact with the central conductor of the cable portion.
  • the penetrable end portion of the hollow outer casing may smoothly taper to a point to provide improved penetration of the outer layer or layers of the cable portion being tapped, and the contact mounted within the hollow outer casing may be movable to break through the hollow outer casing at that tapered point.
  • the pentrable end portion is preferably configured such that, when the contact breaks through it, the broken parts of the penetrable end portion move away from the contact.
  • the connector may include means, such as conductive knife blades mounted within the connector housing, to penetrate the outer casing of the coaxial cable and make electrical contact with the outer conductor of the cable.
  • the connector housing may include resilient means positioned to urge a received cable against the contact assembly.
  • the electrical connector of the present invention overcomes the problems of debris collection described above with reference to the prior art devices by the use of the non-conductive hollow outer casing around the tap connector contact. Debris collected during penetration of the outer layers of a cable will accumulate on the outer surface of the penetrable end portion of the hollow outer casing. When the contact breaks through the hollow outer casing, preferably at a point adjacent the cable central conductor, the broken parts of the penetrable end portion and the collected debris will be pushed away from the contact thereby minimising the amount of dirt and debris which the contact may collect on its way to the cable central conductor.
  • Rotation of the hollow outer casing as it penetrates the outer layer or layers of the cable may assist in reducing the amount of debris collected in a similar manner to the rotated contact described in EP-A-0109229 referred to above.
  • a coaxial cable 10 consists of a central conductor 12 in the form of a copper core around which is a layer of polytetrafluoroethane (PTFE) insulation material 14. Radially outward of the layer of insulation material 14 are layers of polar film 16, copper braiding 18, and an outer layer of insulation material 20 respectively.
  • PTFE polytetrafluoroethane
  • the coaxial cable tap connector 22 of the present invention is shown in figures 1 and 4.
  • the connector 22 has a two part housing comprising a body portion 24 and a concave cover 26.
  • the body 24 has an upper surface 28 which the edges of the cover 26 abut.
  • Resilient tongues 30 extending from the upper surface 28 engage a lip 32 on the inner surface of the cover 26 to hold the cover 26 against the upper surface 28.
  • the end of the resilient tongues 30 and the lip 32 are chamfered (as shown in figure 1) such that the cover 26 has a snap-fit engagement with the body 24.
  • a ridge 34 adjacent the edge of the upper surface 28 locates the edges of the cover 26 relative to the body 24.
  • the cover 26 and upper surface 28 define an aperture therebetween in which a coaxial cable 10 is received.
  • the spacing of the knife blades 36 is less than the outer diameter of the coaxial cable layer of copper braiding 18 such that, when a cable 10 is pressed into the gap between the knife blades 36, they cut through the outer insulation 20 of the cable and make electrical connection with the layer of copper braiding 18.
  • FIG 2 The relative positions of a knife blade 36 and constrained cable 10 are shown in figure 2. As can also be seen from figure 2 the knife blade 36 has an elongated portion 38 extending therefrom to which electrical connection may be made.
  • the inner surface of the cover 26 has three ridges 40,42 extending therefrom towards the cable 10.
  • the ridges 40, 42 are substantially parallel to each other and to the axis of the cable.
  • the two outer ridges 42 extend further from the cover 26 than does the central ridge 40 such that, in addition to pressing the cable 10 against the upper surface 28, the three ridges 40, 42 act to centre the cable with respect to the connector.
  • a contact assembly 44 is mounted below the upper surface 28 and is movable through an aperture 46 therein.
  • the contact assembly 44 comprises a hollow outer casing 48, a contact mounting 50 and a conductive contact 52.
  • a part of the outer surface 54 of the hollow outer casing is threaded and engages a corresponding threaded bore on the internal surface 56 of a cylindrical extension 58 below the upper surface 28 and about the aperture 46 therein.
  • the hollow outer casing 48 tapers to a conical point 60.
  • the contact assembly 44 With the contact assembly 44 in a retracted position (not shown) the conical point 60 of the hollow outer body lies below the level of the upper surface.
  • the contact mounting 50 which holds the conductive contact 52.
  • the outer surface 68 of the contact mounting 50 is threaded and engages a corresponding thread 70 on the inner surface of the hollow outer body 48. Movement of the contact mounting 50 and contact 52 relative to the hollow outer body 48 is achieved by rotation of the contact mounting 50.
  • a profiled aperture 72 is provided in the lower end of the contact mounting 50 allowing the insertion of a suitably shaped tool to engage the contact mounting 50 and rotate it.
  • the conductive contact 52 is shrouded by the contact mounting 50 over its upper portion with the exception of a tapered point 74 at its upper end.
  • the tapered point 74 of the contact 52 is positioned in a correspondingly shaped aperture within the conical point 60.
  • the contact mounting 50 When the conical point 60 has penetrated the cable to the required depth, the contact mounting 50 is rotated within the hollow outer body 48. This rotation causes the tapered point 74 of the contact 52 to break through the conical point 60 of the hollow outer body 48. Further rotation of the contact mounting 50 brings the tapered point 74 into contact with the copper core 12 of the cable as shown in figure 3.
  • the broken pieces 60a, 60b of the conical point 60 are pushed away from the contact 50 such that any debris which has accumulated on the conical point 60 during its passage through the outer layers of the cable, and any strands of the copper braiding 18 of the cable shield, do not come into contact with either the tapered point 74 of the contact or the copper core of the cable.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Multi-Conductor Connections (AREA)
EP91305649A 1990-06-22 1991-06-21 Kabelabgriffverbinder Withdrawn EP0463824A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9013948 1990-06-22
GB9013948A GB2245434A (en) 1990-06-22 1990-06-22 Cable tapping connector.

Publications (1)

Publication Number Publication Date
EP0463824A1 true EP0463824A1 (de) 1992-01-02

Family

ID=10678042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91305649A Withdrawn EP0463824A1 (de) 1990-06-22 1991-06-21 Kabelabgriffverbinder

Country Status (3)

Country Link
EP (1) EP0463824A1 (de)
JP (1) JPH04357677A (de)
GB (1) GB2245434A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1178571A2 (de) * 2000-07-31 2002-02-06 FINCANTIERI CANTIERI NAVALI ITALIANI S.p.A. Verbesserungen in Einrichtungen und Verfahren für die Verteilung von Elektrizität und Signalen, insbesondere zur Verwendung in Schiffen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104917015B (zh) * 2015-03-09 2018-02-02 济南新盛电子科技有限公司 一种规格化的智能家用仪表通信线路

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0038144A2 (de) * 1980-04-10 1981-10-21 AMP INCORPORATED (a New Jersey corporation) Prüfspitze für ein Koaxialkabel
EP0109229A1 (de) * 1982-11-03 1984-05-23 AMP INCORPORATED (a New Jersey corporation) Abzweigverbinder für Koaxialkabel
DE3709841A1 (de) * 1987-01-27 1988-10-06 Rema Lipprandt Gmbh Co Kg Kabelabzweig-klemme und vollisoliert ausgebildeter abzweig eines kabels von einem unter spannung kontaktierten hauptkabel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3836941A (en) * 1973-07-05 1974-09-17 Thomas & Betts Corp Electrical connector with resilient pressure pad
US4215908A (en) * 1978-12-15 1980-08-05 Cathodic Protection Services, Inc. Arcless clamp connector
EP0270276A1 (de) * 1986-11-14 1988-06-08 Advanced Scientific Corporation Vorrichtung zum Testen einer Schaltung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0038144A2 (de) * 1980-04-10 1981-10-21 AMP INCORPORATED (a New Jersey corporation) Prüfspitze für ein Koaxialkabel
EP0109229A1 (de) * 1982-11-03 1984-05-23 AMP INCORPORATED (a New Jersey corporation) Abzweigverbinder für Koaxialkabel
DE3709841A1 (de) * 1987-01-27 1988-10-06 Rema Lipprandt Gmbh Co Kg Kabelabzweig-klemme und vollisoliert ausgebildeter abzweig eines kabels von einem unter spannung kontaktierten hauptkabel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1178571A2 (de) * 2000-07-31 2002-02-06 FINCANTIERI CANTIERI NAVALI ITALIANI S.p.A. Verbesserungen in Einrichtungen und Verfahren für die Verteilung von Elektrizität und Signalen, insbesondere zur Verwendung in Schiffen
EP1178571A3 (de) * 2000-07-31 2002-04-03 FINCANTIERI CANTIERI NAVALI ITALIANI S.p.A. Verbesserungen in Einrichtungen und Verfahren für die Verteilung von Elektrizität und Signalen, insbesondere zur Verwendung in Schiffen

Also Published As

Publication number Publication date
JPH04357677A (ja) 1992-12-10
GB2245434A (en) 1992-01-02
GB9013948D0 (en) 1990-08-15

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