WO1992021166A1 - Connection adaptor - Google Patents

Connection adaptor Download PDF

Info

Publication number
WO1992021166A1
WO1992021166A1 PCT/GB1992/000847 GB9200847W WO9221166A1 WO 1992021166 A1 WO1992021166 A1 WO 1992021166A1 GB 9200847 W GB9200847 W GB 9200847W WO 9221166 A1 WO9221166 A1 WO 9221166A1
Authority
WO
WIPO (PCT)
Prior art keywords
connection
ferrule
cable
seat
collet
Prior art date
Application number
PCT/GB1992/000847
Other languages
French (fr)
Inventor
Kenneth Robert Scott
Original Assignee
Kenneth Robert Scott
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 Kenneth Robert Scott filed Critical Kenneth Robert Scott
Publication of WO1992021166A1 publication Critical patent/WO1992021166A1/en

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
    • 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
    • H01R9/0521—Connection to outer conductor by action of a nut

Definitions

  • the present invention relates to a connection adaptor for connection of a coaxial cable having a screening braid to complementary contacts, particularly though not exclusively to such contacts of a multi-pin socket as is commonly employed as a card edge connector on a printed circuit board.
  • the tapered collet of the cable restraint is slid over a free end of a coaxial cable, the free end of the coaxial cable having been stripped for a short length so that proceeding inwardly from the free end the following elements are exposed, firstly the central conductor and then the inner insulator, but usually not the braided conductor.
  • the ferrule is then inserted between the inner insulation and the braided conductor.
  • the end of the cable and the collet are offered up to the body and the collet is fixed to the body to secure the cable.
  • the cable may be stripped to expose the braid, in which case the latter is gripped directly between the collet and the ferrule.
  • the collet is normally sized to act on an external sheath of the cable, but may be sized to act on the braid of the cable.
  • the tapered collet is of plastics material, whilst the ferrule is metallic.
  • the second terminal has a lug which extends across the seat and the ferrule abuts the lug when urged towards the seat by the collet. It is preferable for the ferrule and the second terminal to be permanently connected.
  • the ferrule may be captivated with the body. However, it is preferable for the ferrule to be withdrawable from the body, together with its terminal when permanently connected to it, for fitting within the braid of the cable.
  • the collet fixture means and the complementary fixture means are complementary screw threads.
  • the first terminal is equipped with a grab wire mechanism for contacting and gripping the inner conductor of the cable.
  • the body has a stud externally carrying the body's screw thread, the said bores extend into the stud.
  • Figure 1 shows a sectional view of the connection adaptor of the invention in use with a coaxial cable attached
  • Figure 2 shows a side elevation of the stripped free end of a coaxial cable for fitting to the adaptor of Figure 1.
  • connection adaptor A has a connector body 1 of moulded plastics material.
  • a pair of metal connection terminals 2,3 extend through bores 4,5 in the body.
  • the connection terminals terminate at one end in pin contacts 6,7 which protrude into two of voids 9,10,11 of a 3x3 multi-pin plug 8 extending from the body.
  • the inner end of the first connection terminal 2 terminates within the body with a "grab wire" 12.
  • the other end of the second connection terminal 3 terminates at a recessed seat 13 in an end 14 of a hollow stud connector 15.
  • the stud connector 15 projects from the connector body and has a thread 16 moulded in its external surface.
  • the stud has a central bore 18, which is a continuation of the bore 4 housing the first connection terminal 2.
  • a tapered, metal ferrule 20 which seats in the recess 13 and there contacts the second connection terminal 3 either by abutment or permanent connection.
  • the ferrule and the connection terminal 3 are of a single sheet metal pressing.
  • a moulded plastics, tapered collet 21 with an internal thread 22 is fitted to the stud connector.
  • the coaxial cable 30 shown in Figure 2 has its central conductor 31 exposed and its inner insulator 32 exposed. However, its braided conductor 33 remains covered by its outer sheath 34.
  • the coaxial cable 30 is first stripped as in Figure 2.
  • the collet 21 is then placed over the cable; and the tapered ferrule 20, which has an internal bore 23, is inserted between the inner insulator 32 and the braided conductor 33.
  • the cable is inserted into the bore 18 of the stud connector 15 so that the central conductor 31 contacts the first connection terminal 2 at its "grab wire" 12, and the ferrule abuts a lug 24 of the second connection terminal 3 and captivates this between itself and the seat 13.
  • the collet is then tightened on the stud thereby urging the braided conductor 33 into contact with the tapered external surface 25 of the ferrule and hence making electrical contact with the second interconnection terminal.
  • the collet grips the outer insulator to provide strong mechanical anchoring of the cable.
  • the adaptor is now ready for insertion in a card edge socket.
  • the second terminal and the ferrule may be permanently fixed in the body and the ferrule worked under the braided conductor as the cable is offered up to the body.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)

Abstract

A connection adaptor for a coaxial cable having a screening braid (33) has: a body (1) formed with a screw thread (16), a ferrule seat (13) arranged transverse to the axis of the screw thread and connection terminal bores (4, 5), one of the bores opening at the seat on the axis of the screw thread; two connection terminals (2, 3) housed in the bores (4, 5), the connection terminals having contacts (6, 7); a ferrule (20) adapted to be supported by the seat and to contact a lug (24) of the second terminal (5), the ferrule having an internal bore (23) fits over an inner insulator (32) of the cable and an external taper (25) fits within its braid (33); and a collet (21) internally tapered complementarily to the ferrule (13) and having a thread complementary to the body's screw thread (16). In use the collet (21) is screwed to the body to urge the braid against the ferrule for mechanical securing of the cable and for electrical contact via the ferrule of the braid with the terminal (3). The inner conductor (31) of the cable extends with the inner insulator past the seat (13) to contact the connection terminal (2).

Description

Connection Adaptor
Background of the Invention
The present invention relates to a connection adaptor for connection of a coaxial cable having a screening braid to complementary contacts, particularly though not exclusively to such contacts of a multi-pin socket as is commonly employed as a card edge connector on a printed circuit board.
Conventionally coaxial cables have been been adapted for connection to printed circuit boards by various means. These have usually required soldered joints between the adaptor and the conductor elements of the coaxial cable. The adaptor itself has almost invariably contained many small parts and these have required dextrous manipulation for successful assembly. Consequently in a modern telecommunication exchange where many such connections exist, much time is spent making up and fitting such adaptors.
The Invention
It is the object of the present invention to provide an improved connection adaptor which is faster and simpler to fit.
A connection adaptor according to the invention for connection of a coaxial cable having a screening braid to complementary contacts comprises: a body formed with collet fixture means, a ferrule seat and connection terminal bores, one of the bores opening at the seat with the seat being arranged transversely of the one bore, at least two connection terminals housed in the bores, the connection terminals having contacts for connection with the complementary contacts, a ferrule adapted to be supported by the seat and to contact a second one of the connection terminals in another of the bores, the ferrule having an internal bore to enable it to fit over an inner insulator of the cable and an external taper to enable it to fit within the cable's braid with the inner insulator extending into the bore opening at the seat, and a collet internally tapered complementarily to the ferrule and having complementary fixture means, in use the collet being fixed to the body with the braid urged against the ferrule for mechanical securing of the cable and for electrical contact via the ferrule of the braid with the second terminal, with an inner conductor of the cable extending with the inner insulator past the seat to contact a first of the connection terminals in the bore opening at the seat.
In use the tapered collet of the cable restraint is slid over a free end of a coaxial cable, the free end of the coaxial cable having been stripped for a short length so that proceeding inwardly from the free end the following elements are exposed, firstly the central conductor and then the inner insulator, but usually not the braided conductor. The ferrule is then inserted between the inner insulation and the braided conductor. The end of the cable and the collet are offered up to the body and the collet is fixed to the body to secure the cable. The cable may be stripped to expose the braid, in which case the latter is gripped directly between the collet and the ferrule.
Accordingly, the collet is normally sized to act on an external sheath of the cable, but may be sized to act on the braid of the cable. Conveniently the tapered collet is of plastics material, whilst the ferrule is metallic. In one arrangement, the second terminal has a lug which extends across the seat and the ferrule abuts the lug when urged towards the seat by the collet. It is preferable for the ferrule and the second terminal to be permanently connected.
The ferrule may be captivated with the body. However, it is preferable for the ferrule to be withdrawable from the body, together with its terminal when permanently connected to it, for fitting within the braid of the cable.
Preferably, the collet fixture means and the complementary fixture means are complementary screw threads.
Conveniently, the first terminal is equipped with a grab wire mechanism for contacting and gripping the inner conductor of the cable.
In the preferred embodiment, the body has a stud externally carrying the body's screw thread, the said bores extend into the stud.
To help understanding of the invention, a specific embodiment thereof will now be described by way of example and with reference to the accompanying drawings.
The Drawings
Figure 1 shows a sectional view of the connection adaptor of the invention in use with a coaxial cable attached, and
Figure 2 shows a side elevation of the stripped free end of a coaxial cable for fitting to the adaptor of Figure 1. The Preferred Embodiment
Turning to Figure 1, the connection adaptor A has a connector body 1 of moulded plastics material. A pair of metal connection terminals 2,3 extend through bores 4,5 in the body. The connection terminals terminate at one end in pin contacts 6,7 which protrude into two of voids 9,10,11 of a 3x3 multi-pin plug 8 extending from the body. The inner end of the first connection terminal 2 terminates within the body with a "grab wire" 12. The other end of the second connection terminal 3 terminates at a recessed seat 13 in an end 14 of a hollow stud connector 15. The stud connector 15 projects from the connector body and has a thread 16 moulded in its external surface. The stud has a central bore 18, which is a continuation of the bore 4 housing the first connection terminal 2. A tapered, metal ferrule 20 which seats in the recess 13 and there contacts the second connection terminal 3 either by abutment or permanent connection. Alternatively, the ferrule and the connection terminal 3 are of a single sheet metal pressing. A moulded plastics, tapered collet 21 with an internal thread 22 is fitted to the stud connector.
The coaxial cable 30 shown in Figure 2 has its central conductor 31 exposed and its inner insulator 32 exposed. However, its braided conductor 33 remains covered by its outer sheath 34.
In use of the connection adaptor, the coaxial cable 30 is first stripped as in Figure 2. The collet 21 is then placed over the cable; and the tapered ferrule 20, which has an internal bore 23, is inserted between the inner insulator 32 and the braided conductor 33. The cable is inserted into the bore 18 of the stud connector 15 so that the central conductor 31 contacts the first connection terminal 2 at its "grab wire" 12, and the ferrule abuts a lug 24 of the second connection terminal 3 and captivates this between itself and the seat 13. The collet is then tightened on the stud thereby urging the braided conductor 33 into contact with the tapered external surface 25 of the ferrule and hence making electrical contact with the second interconnection terminal. The collet grips the outer insulator to provide strong mechanical anchoring of the cable. The adaptor is now ready for insertion in a card edge socket.
The invention is not intended to be restricted to the details of the above described embodiment. For instance, the second terminal and the ferrule may be permanently fixed in the body and the ferrule worked under the braided conductor as the cable is offered up to the body.

Claims

CLAIMS:
1. A connection adaptor for connection of a coaxial cable having a screening braid to complementary contacts, the connection adaptor comprising: a body formed with collet fixture means, a ferrule seat and connection terminal bores, one of the bores opening at the seat with the seat being arranged transversely of the one bore, at least two connection terminals housed in the bores, the connection terminals having contacts for connection with the complementary contacts, a ferrule adapted to be supported by the seat and to contact a second one of the connection terminals in another of the bores, the ferrule having an internal bore to enable it to fit over an inner insulator of the cable and an external taper to enable it to fit within the cable's braid with the inner insulator extending into the bore opening at the seat, and a collet internally tapered complementarily to the ferrule and having complementary fixture means, in use the collet being fixed to the body with the braid urged against the ferrule for mechanical securing of the cable and for electrical contact via the ferrule of the braid with the second terminal, with an inner conductor of the cable extending with the inner insulator past the seat to contact a first of the connection terminals in the bore opening at the seat.
2. A connection adaptor as claimed in claim 1, wherein the collet is sized to act on an external sheath of the cable.
3. A connection adaptor as claimed in claim 1, wherein the collet is sized to act on the braid of the cable.
4. A connection adaptor as claimed in claim 1, claim 2 or claim 3, wherein the tapered collet is of plastics material and the ferrule is metallic.
5. A connection adaptor as claimed in any preceding claim. wherein the second connection terminal has a lug which extends across the seat and the ferrule abuts the lug when urged towards the seat by the collet.
6. A connection adaptor as claimed in any preceding claim, wherein the ferrule and the second connection terminal are permanently connected.
7. A connection adaptor as claimed in any preceding claim, wherein the ferrule can be withdrawn from the body, together with the second connection terminal when permanently connected to it, for fitting within the braid of the cable.
8. A connection adaptor as claimed in claim 6, wherein the ferrule and the second connection terminal are permanently captivated with the body.
9. A connection adaptor as claimed in any preceding claim, wherein the first connection terminal is equipped with a grab wire mechanism for contacting and gripping the inner conductor of the cable.
10. A connection adaptor as claimed in any preceding claim, wherein the collet fixture means and the complementary fixture means are complementary screw threads.
11. A connection adaptor as claimed in claim 10, wherein the body has a stud externally carrying the body's screw thread, the said bores extend into the stud.
12. A connection adaptor for connection of a coaxial cable substantially as hereinbefore described with reference to the accompanying drawings.
PCT/GB1992/000847 1991-05-14 1992-05-11 Connection adaptor WO1992021166A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB919110370A GB9110370D0 (en) 1991-05-14 1991-05-14 Connection adaptor
GB9110370.5 1991-05-14

Publications (1)

Publication Number Publication Date
WO1992021166A1 true WO1992021166A1 (en) 1992-11-26

Family

ID=10694945

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1992/000847 WO1992021166A1 (en) 1991-05-14 1992-05-11 Connection adaptor

Country Status (2)

Country Link
GB (1) GB9110370D0 (en)
WO (1) WO1992021166A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5766036A (en) * 1996-10-11 1998-06-16 Molex Incorporated Impedance matched cable assembly having latching subassembly
US5830010A (en) * 1996-10-11 1998-11-03 Molex Incorporated Impedance matched cable assembly

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1284648A (en) * 1961-01-05 1962-02-16 Geoffroy Delore Connection terminals between electric cables of the concentric conductor type and an electric circuit with non-concentric conductors
EP0077246A1 (en) * 1981-10-02 1983-04-20 The Bendix Corporation Electrical connector for a coaxial cable
DE9000964U1 (en) * 1990-01-29 1990-04-05 Coninvers Elektronische Bauelemente Gmbh, 7033 Herrenberg, De

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1284648A (en) * 1961-01-05 1962-02-16 Geoffroy Delore Connection terminals between electric cables of the concentric conductor type and an electric circuit with non-concentric conductors
EP0077246A1 (en) * 1981-10-02 1983-04-20 The Bendix Corporation Electrical connector for a coaxial cable
DE9000964U1 (en) * 1990-01-29 1990-04-05 Coninvers Elektronische Bauelemente Gmbh, 7033 Herrenberg, De

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5766036A (en) * 1996-10-11 1998-06-16 Molex Incorporated Impedance matched cable assembly having latching subassembly
US5830010A (en) * 1996-10-11 1998-11-03 Molex Incorporated Impedance matched cable assembly

Also Published As

Publication number Publication date
GB9110370D0 (en) 1991-07-03

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