EP0731991A1 - Sealed terminal for a coated open wire - Google Patents

Sealed terminal for a coated open wire

Info

Publication number
EP0731991A1
EP0731991A1 EP95901458A EP95901458A EP0731991A1 EP 0731991 A1 EP0731991 A1 EP 0731991A1 EP 95901458 A EP95901458 A EP 95901458A EP 95901458 A EP95901458 A EP 95901458A EP 0731991 A1 EP0731991 A1 EP 0731991A1
Authority
EP
European Patent Office
Prior art keywords
wire
terminal
body member
sleeve
fastening
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Withdrawn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
EP95901458A
Other languages
German (de)
French (fr)
Inventor
Harri Turunen
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.)
Sekko Oy AB
Original Assignee
Sekko Oy AB
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 Sekko Oy AB filed Critical Sekko Oy AB
Publication of EP0731991A1 publication Critical patent/EP0731991A1/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • H01R4/50—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/26—End pieces terminating in a screw clamp, 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut
    • H01R4/44—Clamping areas on both sides of screw

Definitions

  • the present invention relates to a sealed terminal for a coated open wire, comprising a body member, a clamp element included in the body member for fastening the terminal to an insulator, a coupling for connecting a branch wire, and a sleeve-like fastening socket provided with fastening ele ⁇ ments for taking up the mechanical stresses of a wire.
  • the end of a wire is stripped of the wire insulation over a certain distance and the sealing is effected by means of separate protectors, ⁇ such as e.g. shrinking plastics, used for surrounding the junction point between a terminal and a wire.
  • separate protectors ⁇ such as e.g. shrinking plastics
  • the branch wire is connected by means of a separate coupling or cable grips which must be clamped around the wire with a tool.
  • the prior known terminals With the prior known terminals, the electrical contact is poor because of a plurality of coupling transition points.
  • the prior known terminals include at least 3-4 transfer resistances produced by transitions.
  • the prior known terminals are relatively long, making the installation thereof inconvenient.
  • An object of the invention is to provide an improved sealed terminal capable of utilizing a per se known automatically locking fastening sleeve for taking up the stresses of a wire while reducing the number of transfer resistances to at least two and reducing the terminal length for an improved installability.
  • fig. 1 shows a sealed terminal of the invention in a side view and partially cut away
  • fig. 2 is a plan view of the same terminal.
  • the terminal includes a body member 1 which is made of profiled aluminium and provided with a fastening element 3 for attaching the terminal to an insulator.
  • the body 1 is provided with a longitudinal extension which is a sleeve-like fastening socket 2, comprising a conical sleeve provided thereinside are wedge elements 7 clamping against the surface of a wire.
  • a spring 8 is used for bias ⁇ ing the wedge elements 7 towards the tapering direction of the cone 2 whereby, upon the insertion of a wire, the wedge elements 7 are able to yield as the spring 8 is compressing.
  • the wedge elements 7 clamp with a major force against the wire surface providing a locking which takes up the mechanical tensile stress.
  • Such sleeve-like fastening sockets are prior known. In the inven ⁇ tion, however, it is used for providing a novel type of assembly with the body member 1.
  • the body 1 is provided with a wire-end receiving space 9 included in the axial extension of said sleeve-like fastening socket 2.
  • the body member 1 includes threaded holes, provided with moment screws 10 whose ends extend inside the space 9 and provide an electrical contact as the screws 10 are tightened against the wire end within the space 9.
  • the body 1 is fitted a coupling element 4 (in the present case, two elements side by side) by using screws 14.
  • the coupling elements 4 and the body 1 are provided with a first pair of jaws, said jaws including meshed surfaces provided with teeth 5 capable of piercing the wire insulation.
  • a second pair of jaws includes meshed or contact surfaces 6, between which can be fitted a flash barrier horn or a working earth conductor.
  • the teeth 5 may have a length sufficient for piercing the branch wire coating and, thus, the branch wire coating need not be stripped off.
  • the fastening cone 2 is connected to the body as follows.
  • the base portion of said fastening cone or sleeve 2 is surrounded by a locking ring 11 which is fastened with screws 13 to brackets 15 included in the bottom of the body 1.
  • the base of said fastening cone or sleeve 2 is provided with an annular bulge or boss 12, fitted between the bottom of the body 1 and the locking ring 11.
  • this annular boss 12 engages behind the locking ring 11 and transmits the tensile stress of a wire from the sleeve or cone 2 to the locking ring 11 from which the stress or loading transmits by way of the screws 13 to the body member 1.
  • the electrical contact need not be carried over the transition point between the sleeve or cone 2 and the body member 1 but the electrical contact is produced directly on the aluminium body 1 as the end of a wire is located within the space 9.
  • the wedge elements 7 can be provided with teeth capable of piercing the wire coating. This solution is particularly useful in the case when the body 1 and the fastening cone 2 are made in a single piece. Thus, the end of a wire need not be stripped off but a sufficient electrical contact is obtained by means of teeth capable of piercing the coating.

Landscapes

  • Cable Accessories (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

The invention relates to a sealed terminal for a coated open wire, comprising a body member (1) and a conical fastening sleeve (2) connected therewith as well as a clamp element (3) for fastening the terminal to an insulator. The body (1) is provided with a wire-end receiving space (9) included in the axial extension of said sleeve-like fastening socket (2). The body (1) is provided with screws for providing an electrical contact between the wire end inserted in said space (9) and the body (1). A coupling element (4) can be used for clamping a branch wire into contact with the body member (1). The tensile load of a wire is taken up by means of wedge elements (7) included in the conical sleeve (2).

Description

Sealed terminal for a coated open wire
The present invention relates to a sealed terminal for a coated open wire, comprising a body member, a clamp element included in the body member for fastening the terminal to an insulator, a coupling for connecting a branch wire, and a sleeve-like fastening socket provided with fastening ele¬ ments for taking up the mechanical stresses of a wire.
When using such terminals, the end of a wire is stripped of the wire insulation over a certain distance and the sealing is effected by means of separate protectors, ■ such as e.g. shrinking plastics, used for surrounding the junction point between a terminal and a wire.
The branch wire is connected by means of a separate coupling or cable grips which must be clamped around the wire with a tool.
With the prior known terminals, the electrical contact is poor because of a plurality of coupling transition points. The prior known terminals include at least 3-4 transfer resistances produced by transitions. In addition, the prior known terminals are relatively long, making the installation thereof inconvenient.
An object of the invention is to provide an improved sealed terminal capable of utilizing a per se known automatically locking fastening sleeve for taking up the stresses of a wire while reducing the number of transfer resistances to at least two and reducing the terminal length for an improved installability.
This object is achieved on the basis of the characterizing features set forth in the appended claim 1. The non-independent claims disclose preferred ways of prac¬ ticing the invention relating to the most preferred exempla¬ ry embodiment of the invention.
The invention will now be described in more detail with reference made to the accompanying drawings, in which
fig. 1 shows a sealed terminal of the invention in a side view and partially cut away;
fig. 2 is a plan view of the same terminal.
The terminal includes a body member 1 which is made of profiled aluminium and provided with a fastening element 3 for attaching the terminal to an insulator.
The body 1 is provided with a longitudinal extension which is a sleeve-like fastening socket 2, comprising a conical sleeve provided thereinside are wedge elements 7 clamping against the surface of a wire. A spring 8 is used for bias¬ ing the wedge elements 7 towards the tapering direction of the cone 2 whereby, upon the insertion of a wire, the wedge elements 7 are able to yield as the spring 8 is compressing. As the wire is being pulled outwards, the wedge elements 7 clamp with a major force against the wire surface providing a locking which takes up the mechanical tensile stress. Such sleeve-like fastening sockets are prior known. In the inven¬ tion, however, it is used for providing a novel type of assembly with the body member 1. Therefore, the body 1 is provided with a wire-end receiving space 9 included in the axial extension of said sleeve-like fastening socket 2. The body member 1 includes threaded holes, provided with moment screws 10 whose ends extend inside the space 9 and provide an electrical contact as the screws 10 are tightened against the wire end within the space 9. In view of connecting a branch wire, the body 1 is fitted a coupling element 4 (in the present case, two elements side by side) by using screws 14. The coupling elements 4 and the body 1 are provided with a first pair of jaws, said jaws including meshed surfaces provided with teeth 5 capable of piercing the wire insulation. A second pair of jaws includes meshed or contact surfaces 6, between which can be fitted a flash barrier horn or a working earth conductor. The teeth 5 may have a length sufficient for piercing the branch wire coating and, thus, the branch wire coating need not be stripped off.
The fastening cone 2 is connected to the body as follows. The base portion of said fastening cone or sleeve 2 is surrounded by a locking ring 11 which is fastened with screws 13 to brackets 15 included in the bottom of the body 1. The base of said fastening cone or sleeve 2 is provided with an annular bulge or boss 12, fitted between the bottom of the body 1 and the locking ring 11. Thus, this annular boss 12 engages behind the locking ring 11 and transmits the tensile stress of a wire from the sleeve or cone 2 to the locking ring 11 from which the stress or loading transmits by way of the screws 13 to the body member 1. However, the electrical contact need not be carried over the transition point between the sleeve or cone 2 and the body member 1 but the electrical contact is produced directly on the aluminium body 1 as the end of a wire is located within the space 9.
The wedge elements 7 can be provided with teeth capable of piercing the wire coating. This solution is particularly useful in the case when the body 1 and the fastening cone 2 are made in a single piece. Thus, the end of a wire need not be stripped off but a sufficient electrical contact is obtained by means of teeth capable of piercing the coating.

Claims

Claims
1. A sealed terminal for a coated open wire, comprising a body member (1), a clamp element (3) included in the body member for fastening the terminal to an insulator, a cou¬ pling (4, 5, 14) for connecting a branch wire, and a sleeve¬ like fastening socket (2) provided with fastening elements (7) for taking up the mechanical stresses of a wire, c h a r a c t e r i z e d in that the body (1 ) is provided with a wire-end receiving space (9) included in the axial extension of the sleeve-like fastening socket (2) as well as elements (10) extending into said receiving space (9) for providing an electrical contact between the wire end and the body (1) and that said branch-wire coupling (4, 5, 14) partly consists of the body member (1) and partly of a separate coupling element (4) in such a manner that the branch wire is connectable between the coupling element (4) and the body member (1 ) .
2. A terminal as set forth in claim 1, c h a r a c t e r ¬ i z e d in that the coupling element (4) and the body member (1 ) are provided with a first pair of jaws, said jaws including meshed surfaces provided with teeth (5) capable of piercing the wire insulation, and a second pair of jaws including meshed or contact surfaces (6), between which can be fitted a flash barrier horn or a working earth conductor.
3. A terminal as set forth in claim 1, c h a r a c t e r ¬ i z e d in that the base portion of said fastening socket sleeve (2) is surrounded by a locking ring (11) fastened with screws (13) to a bottom (15) included in the body (1), and that between the bottom (15) of the body and said lock¬ ing ring (11) is an annular boss (12) included in the fas¬ tening socket sleeve (2), said boss transmitting the tensile stress of a wire from the sleeve (2) to the locking ring (11) from which the stress of loading transmits by way of said screws (13) to the body member (1).
4. A terminal as set forth in claim 1, c h a r a c t e r ¬ i z e d in that said elements (10) providing an electrical contact are moment screws fitted in threaded holes included in the body member (1 ) .
5. A terminal as set forth in claim 1 or 3, c h a r a c ¬ t e r i z e d in that the sleeve-like fastening socket (2) comprises a per se known conical sleeve, provided thereinside with spring-loaded wedge elements (7) which clamp against the wire surface.
6. A terminal as set forth in any of claims 1-5, c h a r ¬ a c t e r i z e d in that the body member (1 ) is made of profiled aluminium.
7. A terminal as set forth in claim 5, c h a r a c t e r ¬ i z e d in that the wedge elements (7) are provided with teeth capable of piercing the wire coating.
8. A terminal as set forth in claim 7, c h a r a c t e r ¬ i z e d in that the body member (1) and the fastening cone (2) are made in a single piece.
EP95901458A 1993-11-30 1994-11-29 Sealed terminal for a coated open wire Withdrawn EP0731991A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI935338A FI93596C (en) 1993-11-30 1993-11-30 Sealed clamp holder to a coated air line
FI935338 1993-11-30
PCT/FI1994/000531 WO1995015593A1 (en) 1993-11-30 1994-11-29 Sealed terminal for a coated open wire

Publications (1)

Publication Number Publication Date
EP0731991A1 true EP0731991A1 (en) 1996-09-18

Family

ID=8539047

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95901458A Withdrawn EP0731991A1 (en) 1993-11-30 1994-11-29 Sealed terminal for a coated open wire

Country Status (9)

Country Link
EP (1) EP0731991A1 (en)
AU (1) AU1068895A (en)
CZ (1) CZ282466B6 (en)
FI (1) FI93596C (en)
HU (1) HU216031B (en)
NO (1) NO962193D0 (en)
PL (1) PL175370B1 (en)
SK (1) SK65796A3 (en)
WO (1) WO1995015593A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2744289B1 (en) * 1996-01-29 1998-04-30 App Mat Elect Const BYPASS CONNECTOR FOR UNDERGROUND CABLE

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1712108A (en) * 1926-10-01 1929-05-07 Robert A Goeller Connecter
GB1197426A (en) * 1969-05-13 1970-07-01 Fargo Mfg Co Inc Electric Cable Connector
US3621413A (en) * 1970-01-19 1971-11-16 Bunker Ramo Strain relief for electrical connectors
FR2191814A5 (en) * 1972-06-27 1974-02-01 Verlant Et Beau Ain

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9515593A1 *

Also Published As

Publication number Publication date
CZ282466B6 (en) 1997-07-16
HU216031B (en) 1999-04-28
FI93596B (en) 1995-01-13
FI93596C (en) 1995-04-25
PL175370B1 (en) 1998-12-31
FI935338A0 (en) 1993-11-30
NO962193L (en) 1996-05-29
WO1995015593A1 (en) 1995-06-08
HUT76212A (en) 1997-07-28
AU1068895A (en) 1995-06-19
SK65796A3 (en) 1997-02-05
PL314682A1 (en) 1996-09-16
CZ153996A3 (en) 1996-11-13
NO962193D0 (en) 1996-05-29

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Legal Events

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

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Effective date: 19960607

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Effective date: 19990308

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18W Application withdrawn

Withdrawal date: 19990525