GB2173357A - Crimp connector electrically connecting cable screen to terminal - Google Patents

Crimp connector electrically connecting cable screen to terminal Download PDF

Info

Publication number
GB2173357A
GB2173357A GB08605425A GB8605425A GB2173357A GB 2173357 A GB2173357 A GB 2173357A GB 08605425 A GB08605425 A GB 08605425A GB 8605425 A GB8605425 A GB 8605425A GB 2173357 A GB2173357 A GB 2173357A
Authority
GB
United Kingdom
Prior art keywords
sleeve
screen
outer sleeve
cable
arms
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Withdrawn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
GB08605425A
Other versions
GB8605425D0 (en
Inventor
Joerg Grosse-Dunker
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.)
Nixdorf Computer AG
Atos IT Solutions and Services Inc
Original Assignee
Nixdorf Computer AG
Nixdorf Computer 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 Nixdorf Computer AG, Nixdorf Computer Corp filed Critical Nixdorf Computer AG
Publication of GB8605425D0 publication Critical patent/GB8605425D0/en
Publication of GB2173357A publication Critical patent/GB2173357A/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Withdrawn legal-status Critical Current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
    • H01R4/58—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 characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
    • H01R4/646—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail for cables or flexible cylindrical bodies
    • 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
    • H01R11/12—End pieces terminating in an eye, hook, or fork
    • 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
    • H01R4/26—Connections in which at least one of the connecting parts has projections which bite into or engage the other connecting part in order to improve the contact
    • 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
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4854—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a wire spring
    • H01R4/4863—Coil spring

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Abstract

A crimp connector comprises an inner sleeve (16) placed between a bared part of screen (12) and the or each core of the cable, and an outer sleeve (17) placed on the screen (12) and crimped onto the inner sleeve (16) and the screen (12). The inner sleeve (16) has a diameter which widens the bared part of the screen (12) to approximately the diameter of external insulation (11), and the outer sleeve (17) is longer than the bared part of the screen (12). <IMAGE>

Description

SPECIFICATION A two-part connector for connecting the screen of a screened and externally insulated electric cable This invention relates to a two-part connector for connecting the screen of a screened and externally insulated electric cable, the connector comprising an inner sleeve adapted to be placed between a bared part of the screen and the or each core of the cable, and an outer sleeve adapted to be placed on the screen and to be clamped to the inner sleeve with the interposition of the screen.
A known connector of this kind enables an electrical connecting wire to be connected to the screen of the screened cable, the end of the connecting wire being pushed below the outer sleeve before the same is clamped to the inner sleeve so that the wire end engages on the bared part of the screen. When the outer sleeve is then clamped to the inner sleeve, a durable electrical connection is produced between the screen and the connecting wire, as is also a termination of the screened electric cable- which engages firmly around the screen. When the outer sleeve and inner sleeve are clamped, the inner sleeve provides protection for the cable cores inside it against damage during clamping.
A disadvantage of the known two-part connector is that a very wide range of sizes of both the inner sleeve and outer sleeve must be available for electric cables of different thicknesses to be provided with a screen connection. A reliable screen connection can be provided only when the dimensions of both sleeves are matched to the dimensions of the cable. When the same is placed, for example, in an applicance or machine, the connecting wire having the screen connection can be earthed. However, the cable end having the screen connection must be reliably secured, so that separate cable clips or similar elements are necessary which may also have to make provision for keeping mechanical tension away from the cable.
It is known from DE-A-1 960 246 to use a single element to reduce pull on the cable and to anchor and electrically connect an insulated electric cable. The element is a cable shoe which can be screwed to a front tag, e.g.
having an electrical connection, and which has two sleeve-like parts, one of which is adapted to be clamped to the insulating sheath of the cable and the other to the stripped end of the cable. This step reduces the pull on the cable outer sheath and also provides an electrical connection. However, a cable shoe of this kind is not suitable as a connector for connecting the screen of a screened and externally insulated cable.
It is the object of the invention to provide a connector which can provide a reliable screen connection of a screened and externally insulated cable and can also reliably keep tension away from the cable without separate elements being necessary for this purpose.
According to the invention, starting from a connector of the kind hereinbefore set out, the inner sleeve has a diameter which widens the bared part of the screen to' approximately the diameter of the external insulation, and the outer sleeve is longer than the bared part of the screen.
Consequently, the outer sleeve is pushed over the outer insulation as well as over the bared part of the screen and over the inner sleeve. When compressed for clamping to the inner sleeve, the outer sleeve is compressed over its whole length, with the result that not only is the bared part of the screen between the outer sleeve and the inner sleeve secured but also the outer sleeve is so firmly secured to the insulating sheath of the cable that when the cable end thus created is mounted, for example, on the wall of an electrical appliance, pull on the cable is reduced reliably, thus making it unnecessary to provide a special element to reduce the pull.
Since the inner sleeve has a diameter which widens the bared part of the screen to approximately the diameter of the external insulation, the resulting cable end to be provided with the outer sleeve is of uniform diameter over the bared part of the screen and the immediately following part of the external insulation. Consequently, pressing the outer sleeve over its whole length leads to a cable end of uniform shape. There are various possibilities for the electrical side of the screen terminal thus devised. As in the known arrangement, a connecting wire can be introduced between the outer sleeve and the bared part of the screen. However, other connection elements can be provided directly on the outer sleeve, something which depends largely upon the nature of their manufacture. A variety of forms of outer sleeve are also feasible.The outer sleeve can be, for example, partly cylindrical, in which event it becomes when pressed a complete cylinder enclosing the screen and outer insulation. The outer sleeve can be in two halves which can be clamped to the inner sleeve or outer insulation by screwed connections. However, in a very advantageous embodiment of the invention, the outer sleeve is formed by a number of flexible arms which define the internal width of the outer sleeve, are curved to the shape thereof and are disposed on a sleeve part which is continuous lengthwise of the sleeve.
This embodiment has the advantage that it provides very reliable clamping over the whole length of the outer sleeve, as every arm which extends around the cable end after clamping is operative as an individual component sleeve clamped individually to the inner sleeve or outer insulation. A continuous outer sleeve might be clamped reliably only at its ends, whereas its central zone would extend more loosely around the cable end in dependence upon the thickness of its material and the nature of the pressing tool.
If the arms are disposed on both longitudinal edges of the continuous- sleeve part, the clamping forces become even more uniform over the length of the outer sleeve since the number of individual clamping elements is twice that of the embodiment previously described. If in this case the arms of one longitudinal edge extend into gaps between the arms of the other longitudinal edge, a single size of outer sleeve suffices for the production of screen connections for a large number of cables of different thicknesses, for when the arms extend into gaps between the arms of the other longitudinal edge instead of being opposite one another, the resulting arrangement can be pressed to a very wide range of diameters, the discrete arms extending to various amounts around the cable disposed in the outer sleeve they form.Such an arrangement will be described in greater detail hereinafter with reference to a specific embodiment.
As in the case of known cable clips, the outer sleeve can be formed, in order to vide both electrical earthing and mechanical anchorage, such that the continuous sleeve part is planar and is extended at one end into a securing tag which projects beyond the outer sleeve. This feature provides a very simple form of anchorage with simultaneous connection of a cable end in an electrical appliance. The planar continuous part of the outer sleeve is then in contact with the assembly surface, and so the outer sleeve helps to ensure a reliable fit of the complete assembly in the appliance.
An embodiment of the invention will now be described in detail with reference to the accompanying drawings, wherein: Figure 1 is a partial longitudinal section through a connector embodying the invention, the connector being disposed on a cable end and mounted on an assembly surface, and Figure 2 is a perspective view of the outer sleeve ofthe connector of Figure 1.
Figure 1 shows the end oaf a screened electric cable 10 whose outer insulation 11 has been removed from the left-hand end part so that the braided screen 12 is exposed. The screen 12 extends around a number of cores 13 of the cable 10 to screen them electrically and an insulating sheath 14 extends around the cores 13.
The end of the cable 10 is secured to an assembly surface 15 such as the wall of the casing of an appliance or machine. Securing is provided by means of a two-part connector used to provide a terminal for the electrical screening of the cable. The connector comprises an inner sleeve 16 and an outer sleeve 17, the outer sleeve 17 extending into a securing tag 18 at its left-hand end in Figure 1.
The tag 18 is secured by a screwed connection to surface 15. Further anchorage of sleeve 17 on surface 15 is provided by a hooked anchorage element 20 whichlprojects downwardly from the outer sleeve 17, extends through an aperture 21 in surface 15 and engages behind the surface 15.
The outer diameter of the inner sleeve 16 is such that the introduction of the inner sleeve 16 between the braiding or screen 12 and the insulation 14 widens the sheath-like braiding 12 to approximately the outer diameter of the external insulation 11 of the cable 10, as indicated at 22. The outer sleeve 17-therefore extends uniformly around the entire- end part= of the cable 10. The inner sleeve 16 is shown in Figure 1 as in direct engagement with internal insulation 14. However, this is not strictly necessary. The thickness of the inner sleeve 16 can be such that a gap remains between the internal insulation 14 and the inner sleeve 16.
The outer sleeve 17 as embodied in Figure 1 is not in the shape of a continuous sleeve but is formed by discrete arms 23, 24 which extend in a peripheral direction from the continuous sleeve part 25 in engagement with the surface 15 and extend in ring-fashion around the cable- 10. The arms 23, 24 are therefore not completely visible in the partial longitudinal section of Figure 1. However, the Figure indicates that, when compressed and clamped to ensure a tight fit of the outer sleeve 17, the burred or pointed edges 23', 24' of the arms 23, 24 are pressed into the external insulation 11 to ensure a very tight fit which enhances the pull-reducing effect of the outer sleeve- 17.
The burred edges of the arms 23, 24 also press into the screen 12 and thus ensure a very reliable electrical contact between the outer sleeve 17 and the screen 12.
Figure 2 is a perspective view of the outer sleeve 17 and thus gives a better idea of its lateral arms 23, 24 which extend from the two longitudinal edges of the continuous sleeve part 25. The arms 23, 24 are so arranged that the arms 23 extend into gaps between the arms 24. Consequently, the shape of the outer sleeve 17 can be adapted to a wide range of cable cross-sections by compression of the arms 23, 24, the same engaging between one another to varying extents when the outer sleeve 17 is pressed on the end of the cable 10 (Figure 1).
Also visible in Figure 2 is the tag 18 which in the embodiment shown is a square widening of the left-hand end of the continuous sleeve part 25. The corners of the tag 18 are bent down, as shown by way of example at 18'. This feature ensures very reliable electrical contact between the outer sleeve 17 and the surface 15 (Figure 1).
As can also be gathered from Figure 2, the hooked anchorage element 20 is formed by pressing a piece of material out of the continuous sleeve part 25, to leave an aperture 26 therein.
Conveniently, the outer sleeve 17 is produced bv stamping, in which event the arms 23, 24 initially project straight out from the two longitudinal edges of the continuous sleeve part 25 and are then bent into the configuration shown in Figure 2. Conveniently, stamping is so performed that the burred edge of the stamped element forms the inside of the sleeve, thus leading to the association of the burred edges 23', 24' shown in Figure 1.

Claims (9)

1. A two-part connector for connecting the screen of a screened and externally insulated electric cable, the connector comprising an inner sleeve adapted to be placed between a bared part of the screen and the or each core of the cable, and an outer sleeve adapted to be placed on the screen and to be clamped to the inner sleeve with the interposition of the screen, characterised in that the inner sleeve has a diameter which widens the bared part of the screen to approximately the diameter of the external insulation, and the outer sleeve is longer than the bared part of the screen.
2. A connector according to claim 1, characterised in that the outer sleeve is formed by a number of flexible arms which define the interior of the outer sleeve, are curved to the shape thereof and are disposed on a sleeve part which is continuous lengthwise of the sleeve.
3. A connector according to claim 2, characterised in that the arms are disposed on two longitudinal edges of the continuous sleeve part.
4. A connector according to claim 3, characterised in that the arms of one longitudinal edge extend into gaps between the arms of the other longitudinal edge.
5. A connector according to any one of claims 2-4, characterised in that the continuous sleeve part is planar and is extended at one end into a securing tag which projects beyond the outer sleeve.
6. A connector according to claim 5, characterised in that the continuous sleeve part has a downwardly projecting hooked anchorage element.
7. A connector according to claim 6 or 7, characterised in that the securing tag is polygonal in shape and its corners are bent outwardly.
8. A connector according to any preceding claim, characterised in that the outer sleeve is a stamping whose burred edge provides the inside of the sleeve.
9. A two-part connector for connecting the screen of a screened and externally insulated electric cable, substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
GB08605425A 1985-04-04 1986-03-05 Crimp connector electrically connecting cable screen to terminal Withdrawn GB2173357A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19858510188 DE8510188U1 (en) 1985-04-04 1985-04-04 Two-part connector for shield connection in a shielded and externally insulated electrical line

Publications (2)

Publication Number Publication Date
GB8605425D0 GB8605425D0 (en) 1986-04-09
GB2173357A true GB2173357A (en) 1986-10-08

Family

ID=6779577

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08605425A Withdrawn GB2173357A (en) 1985-04-04 1986-03-05 Crimp connector electrically connecting cable screen to terminal

Country Status (3)

Country Link
DE (1) DE8510188U1 (en)
FR (1) FR2580120B3 (en)
GB (1) GB2173357A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2232540A (en) * 1989-05-17 1990-12-12 New Chapel Electronics Limited Electrical screen connectors

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3096405B1 (en) * 2015-05-22 2019-09-18 Tyco Electronics Raychem GmbH Connecting element for contacting a shielding of a power cable

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB353660A (en) * 1930-07-04 1931-07-30 Henry Alfred Dunn Improved connector or sleeve for electric cables
GB913693A (en) * 1960-01-25 1962-12-28 Cable Covers Ltd Method of jointing cables
GB924920A (en) * 1960-12-20 1963-05-01 Amp Inc Improvements in and relating to electrical connectors
GB1002079A (en) * 1963-03-29 1965-08-25 Amp Inc Improvements in coaxial electrical connectors and in coaxial electrical connections
GB1012357A (en) * 1963-03-21 1965-12-08 Amp Inc Improvements in or relating to coaxial electrical connectors
GB1215274A (en) * 1968-08-23 1970-12-09 Amp Inc Method of connecting a coaxial cable to a member
GB2041794A (en) * 1979-02-20 1980-09-17 Bicc Burndy Ltd Improvements in or relating to ferrules
GB2088152A (en) * 1980-11-15 1982-06-03 Minnesota Mining & Mfg Crimp connector
EP0099633A1 (en) * 1982-06-21 1984-02-01 AMP INCORPORATED (a New Jersey corporation) Coaxial connector plug

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB353660A (en) * 1930-07-04 1931-07-30 Henry Alfred Dunn Improved connector or sleeve for electric cables
GB913693A (en) * 1960-01-25 1962-12-28 Cable Covers Ltd Method of jointing cables
GB924920A (en) * 1960-12-20 1963-05-01 Amp Inc Improvements in and relating to electrical connectors
GB1012357A (en) * 1963-03-21 1965-12-08 Amp Inc Improvements in or relating to coaxial electrical connectors
GB1002079A (en) * 1963-03-29 1965-08-25 Amp Inc Improvements in coaxial electrical connectors and in coaxial electrical connections
GB1215274A (en) * 1968-08-23 1970-12-09 Amp Inc Method of connecting a coaxial cable to a member
GB2041794A (en) * 1979-02-20 1980-09-17 Bicc Burndy Ltd Improvements in or relating to ferrules
GB2088152A (en) * 1980-11-15 1982-06-03 Minnesota Mining & Mfg Crimp connector
EP0099633A1 (en) * 1982-06-21 1984-02-01 AMP INCORPORATED (a New Jersey corporation) Coaxial connector plug

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2232540A (en) * 1989-05-17 1990-12-12 New Chapel Electronics Limited Electrical screen connectors
GB2232540B (en) * 1989-05-17 1993-09-01 New Chapel Electronics Limited Electrical screen connectors

Also Published As

Publication number Publication date
DE8510188U1 (en) 1985-07-25
FR2580120B3 (en) 1987-06-19
FR2580120A3 (en) 1986-10-10
GB8605425D0 (en) 1986-04-09

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Legal Events

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)