EP0284320B1 - Method for terminating a twisted pair screened cable - Google Patents
Method for terminating a twisted pair screened cable Download PDFInfo
- Publication number
- EP0284320B1 EP0284320B1 EP88302441A EP88302441A EP0284320B1 EP 0284320 B1 EP0284320 B1 EP 0284320B1 EP 88302441 A EP88302441 A EP 88302441A EP 88302441 A EP88302441 A EP 88302441A EP 0284320 B1 EP0284320 B1 EP 0284320B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- crimp
- crimping
- buckets
- bucket
- contact
- 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 - Lifetime
Links
Images
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
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
- H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
- H01R13/6591—Specific features or arrangements of connection of shield to conductive members
- H01R13/65912—Specific features or arrangements of connection of shield to conductive members for shielded multiconductor cable
- H01R13/65915—Twisted pair of conductors surrounded by shield
-
- 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
- the invention relates to co-axial connectors for forming cable terminations.
- the invention relates more particularly although not exclusively to connectors for single twisted pair screened cables for use in data highway systems for example.
- An example of a connector of this type is disclosed in EP-A-0 190 843.
- the present invention provides cable terminations in the form of a free connector assembly and/or a fixed connector assembly for connection together or for connection to anchored cooperating respective assemblies including dummy loads and matched impedances.
- connectors are made up of a number of prepared and distinct parts which are either electrical conducting or highly electrically resistive as appropriate which fit together and to which the conductors and a screen of a cable are secured at the terminations.
- the connectors are assembled onto the end of a cable by a laborious, usually manual, process of step by step assembly in which the conductors are connected in turn during that assembly to the required parts.
- a method for terminating a single twisted pair screened cable comprising the steps of providing a free or fixed connector assembly having a dielectric housing for an intermediate contact assembly which includes two longitudinally extending electrical contacts, an inner contact which at one end forms an inner crimp bucket and at the other end a pin or socket, and similarly a middle contact which extends parallel with said inner contact and which forms, at the same end as the inner contact, a middle crimp bucket and at the other end thereof a socket or pin, the dielectric housing being provided with crimping windows in line with said crimp buckets; bearing the end of each wire of a twisted wire pair and inserting each wire of the twisted pair into a respective crimp bucket; crimping each crimping bucket on the respective wire with a single crimping tool having jaws which are able to extend simultaneously through said crimping windows, said tool being positioned about said housing and operated to insert simultaneously said jaws into said windows to compress both said crimp buckets onto their respective wire
- the method is preferably carried out with a free or fixed connector assembly having an intermediate socket contact assembly or an intermediate pin assembly respectively, the assembly having crimping windows in a middle dielectric body of the assembly to permit a crimping tool to extend in use through the windows and to compress an inner contact crimp bucket and a middle contact crimp bucket onto respective conductor ends to secure the conductors thereto.
- the crimp buckets are provided with chamfered path entries to facilitate the entering of the exposed ends into the buckets.
- One or both buckets may have a transverse aperture positioned in line within the window enabling the end of the conductor to be viewed through the aperture before applying a crimp to the bucket.
- the buckets are generally side by side so that bared ends of the conductor can be prepared with equal lengths for connection to the assembly.
- the intermediate socket contact assembly consists of an inner contact 1 (which extends to and has formed therein an inner crimp bucket 1A), an inner dielectric sleeve 2, a middle contact 3 (which extends to and has formed therein a middle crimp bucket 3A), a middle dielectric sleeve 4, and a middle dielectric moulding 5.
- the moulding 5 has two windows 9 in line with the buckets 1A and 3A. It will also be noted that the moulding 5 is chamfered at 5A to provide conductor lead-ins for the buckets 1A and 3A.
- the intermediate pin assembly has an inner contact 1 (extending to an inner crimp bucket 1A), an inner dielectric sleeve 2, a middle contact 3 (extending to a middle crimp bucket 3A), a middle dielectric 4 and a middle dielectric moulding 5.
- the moulding 5 has two windows 9 (see Figure 4).
- a cable ferrule is fitted over the end of a cable to be terminated and then prepared conductor ends, which are equal in length, are presented to the intermediate assemblies.
- the bared conductor ends are fed past the chamfers at 5A and enter inside the appropriate buckets 1A and 3A and are held there.
- a crimping tool is then fitted around the moulding 5 and its jaws entered simultaneously through the two windows 9 to apply crimping pressure to deform the buckets and electrically secure the conductors to the inner and middle contacts respectively.
- outer contacts of generally conventional form are then crimped to the ferrule, trapping the cable screen in the normal way.
- the outer body is provided with screwed connecting parts of conventional form so that the free and fixed connector assemblies can be brought together and screwed up to provide together a screened cable connection.
- a shaped friction pad 6, pressing against a sealing gasket 7 when the assemblies are brought together offers a novel closure aid.
- a closing torque to the screw connection which torque is laid down in the International Standards
- the preferred crimping tool used with the described connector is an H308 crimping tool.
- This tool can be used with jaws suitably designed and adapted to enter the windows 9 as described.
- jaws can be designed where preferred to force a double or triple crimp into each bucket.
- the jaws of this same tool can be designed and used to crimp the screen in a second crimping action. Thus, only one crimping tool is required.
- the described connector is much easier to use to terminate a cable than presently used connectors because the conductors are the same length and bared by the same amount at their ends; this can be done according to a pattern or against a suitable template.
- the chamfers at 5A ensure an easy passage of the conductors into the crimp buckets and there is only one crimping operation.
- Prior connectors invariably consisted of many loose parts which had to be assembled individually for each cable termination or termination repair. During use in the field or while in an equipment, say in an army vehicle or aircraft, it is virtually impossible to keep in place and manipulate a number of small and delicate parts.
- an assembly such as the free or fixed connector assembly as described, a sound termination is relatively easy to achieve in a factory or in the field.
- the embodiments of the invention can be provided for cables having more than two conductors.
- the contact assemblies of Figures 3 and 4 are formed with three or more windows 9, a separate window 9 for each conductor.
- this enables a crimping operation to be carried out after the assemblies have been prepared so that only the few loose parts are needed in kits for actual cable terminations to be achieved. This means that satisfactory terminations can be carried out even in difficult environments at points of need and "in the field" where required.
Landscapes
- Communication Cables (AREA)
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Cable Accessories (AREA)
- Manufacturing Of Electrical Connectors (AREA)
- Multi-Conductor Connections (AREA)
- Wire Processing (AREA)
Abstract
Description
- The invention relates to co-axial connectors for forming cable terminations.
- The invention relates more particularly although not exclusively to connectors for single twisted pair screened cables for use in data highway systems for example. An example of a connector of this type is disclosed in EP-A-0 190 843.
- The present invention provides cable terminations in the form of a free connector assembly and/or a fixed connector assembly for connection together or for connection to anchored cooperating respective assemblies including dummy loads and matched impedances.
- The main physical dimensions of connectors are generally laid down by International Standards so that free and fixed connectors of different suppliers or manufacturers will cooperate with connectors of all other suppliers. Thus, all designs are restricted in practice to comply with such Standards. Further, in all cases careful separation of and electrical screening of the inner conductors is essential. At present connectors are made up of a number of prepared and distinct parts which are either electrical conducting or highly electrically resistive as appropriate which fit together and to which the conductors and a screen of a cable are secured at the terminations. At present the connectors are assembled onto the end of a cable by a laborious, usually manual, process of step by step assembly in which the conductors are connected in turn during that assembly to the required parts.
- It is an object of the invention to provide a method for terminating a single twisted pair screened cable.
- According to the invention there is provided a method for terminating a single twisted pair screened cable, comprising the steps of providing a free or fixed connector assembly having a dielectric housing for an intermediate contact assembly which includes two longitudinally extending electrical contacts, an inner contact which at one end forms an inner crimp bucket and at the other end a pin or socket, and similarly a middle contact which extends parallel with said inner contact and which forms, at the same end as the inner contact, a middle crimp bucket and at the other end thereof a socket or pin, the dielectric housing being provided with crimping windows in line with said crimp buckets; bearing the end of each wire of a twisted wire pair and inserting each wire of the twisted pair into a respective crimp bucket; crimping each crimping bucket on the respective wire with a single crimping tool having jaws which are able to extend simultaneously through said crimping windows, said tool being positioned about said housing and operated to insert simultaneously said jaws into said windows to compress both said crimp buckets onto their respective wire so as to form an electrical contact between the crimp buckets and the wires.
- According to the invention the method is preferably carried out with a free or fixed connector assembly having an intermediate socket contact assembly or an intermediate pin assembly respectively, the assembly having crimping windows in a middle dielectric body of the assembly to permit a crimping tool to extend in use through the windows and to compress an inner contact crimp bucket and a middle contact crimp bucket onto respective conductor ends to secure the conductors thereto.
- Preferably, the crimp buckets are provided with chamfered path entries to facilitate the entering of the exposed ends into the buckets.
- One or both buckets may have a transverse aperture positioned in line within the window enabling the end of the conductor to be viewed through the aperture before applying a crimp to the bucket.
- Preferably, the buckets are generally side by side so that bared ends of the conductor can be prepared with equal lengths for connection to the assembly.
- An embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which:
- Figure 1 is a cross sectional elevation of a free connector assembly;
- Figure 2 is a cross sectional elevation of a fixed connector assembly;
- Figure 3 is a part sectioned enlarged elevation of an intermediate socket assembly; and
- Figure 4 is a part sectioned enlarged elevation of an intermediate pin assembly.
- Referring to the drawings, the general overall dimensions of the assemblies are governed by International Standards and they join up together to provide cable terminations to connect two cables (not shown) together. The intermediate socket assembly and the intermediate pin assembly are preformed for connection to the twin conductors of each cable. In Figures 1 and 2 the parts forming the intermediate assemblies are clearly shown.
- The intermediate socket contact assembly consists of an inner contact 1 (which extends to and has formed therein an
inner crimp bucket 1A), an innerdielectric sleeve 2, a middle contact 3 (which extends to and has formed therein amiddle crimp bucket 3A), a middledielectric sleeve 4, and a middledielectric moulding 5. In Figure 3, it will be seen that themoulding 5 has twowindows 9 in line with thebuckets moulding 5 is chamfered at 5A to provide conductor lead-ins for thebuckets - Similarly, the intermediate pin assembly has an inner contact 1 (extending to an
inner crimp bucket 1A), an innerdielectric sleeve 2, a middle contact 3 (extending to amiddle crimp bucket 3A), a middle dielectric 4 and a middledielectric moulding 5. Themoulding 5 has two windows 9 (see Figure 4). - In use, a cable ferrule is fitted over the end of a cable to be terminated and then prepared conductor ends, which are equal in length, are presented to the intermediate assemblies. The bared conductor ends are fed past the chamfers at 5A and enter inside the
appropriate buckets moulding 5 and its jaws entered simultaneously through the twowindows 9 to apply crimping pressure to deform the buckets and electrically secure the conductors to the inner and middle contacts respectively. - After crimping, appropriate outer contacts of generally conventional form are then crimped to the ferrule, trapping the cable screen in the normal way. The outer body is provided with screwed connecting parts of conventional form so that the free and fixed connector assemblies can be brought together and screwed up to provide together a screened cable connection.
- However, it will be noted that a shaped friction pad 6, pressing against a sealing
gasket 7 when the assemblies are brought together, offers a novel closure aid. Using the friction pad characteristics an initial longitudinal pressing contact is positively discernible by an operator when the assemblies are screwed together and thereafter, by applying a closing torque to the screw connection (which torque is laid down in the International Standards), it is ensured a more certain and secure connection is made than was otherwise always possible. - In many applications apart from laid down International Standards, various tools are also well-known and Officially approved. In this context, the preferred crimping tool used with the described connector is an H308 crimping tool. This tool can be used with jaws suitably designed and adapted to enter the
windows 9 as described. Naturally, jaws can be designed where preferred to force a double or triple crimp into each bucket. The jaws of this same tool can be designed and used to crimp the screen in a second crimping action. Thus, only one crimping tool is required. - It is possible to provide an
aperture 8 at or near the root of one or both of the crimping buckets of each intermediate assembly. This enables the end of one or both conductors to be viewed through thewindow 9 and theaperture 8. Before the crimp is applied it can, in this way, be visually ascertained that the forward end of the conductor has at least entered well down into the bucket. - It will be appreciated that the described connector is much easier to use to terminate a cable than presently used connectors because the conductors are the same length and bared by the same amount at their ends; this can be done according to a pattern or against a suitable template. The chamfers at 5A ensure an easy passage of the conductors into the crimp buckets and there is only one crimping operation. Prior connectors invariably consisted of many loose parts which had to be assembled individually for each cable termination or termination repair. During use in the field or while in an equipment, say in an army vehicle or aircraft, it is virtually impossible to keep in place and manipulate a number of small and delicate parts. By providing the connectors with an assembly, such as the free or fixed connector assembly as described, a sound termination is relatively easy to achieve in a factory or in the field.
- It will be appreciated that the embodiments of the invention can be provided for cables having more than two conductors. In such cases, the contact assemblies of Figures 3 and 4 are formed with three or
more windows 9, aseparate window 9 for each conductor. Similarly as described, this enables a crimping operation to be carried out after the assemblies have been prepared so that only the few loose parts are needed in kits for actual cable terminations to be achieved. This means that satisfactory terminations can be carried out even in difficult environments at points of need and "in the field" where required.
Claims (1)
- A method of terminating a single twisted pair screened cable, comprising the steps of providing a free or fixed connector assembly having a dielectric housing (5) for an intermediate contact assembly which includes two longitudinally extending electrical contacts (1,3), an inner contact (1) which at one end forms an inner crimp bucket (1A) and at the other end a pin or socket, and similarly a middle contact (3) which extends parallel with said inner contact and which forms, at the same end as the inner contact (1), a middle crimp bucket (3A) and at the other end thereof a socket or pin, the dielectric housing (5) being provided with crimping windows (9) in line with said crimp buckets (1A,3A); bearing the end of each wire of a twisted wire pair and inserting each wire of the twisted pair into a respective crimp bucket (1A,3A); crimping each bucket (1A,3A) on the respective wire with a single crimping tool having jaws which are able to extend simultaneously through said crimping windows, said tool being positioned about said housing (5) and operated to insert simultaneously said jaws into said windows (9) to compress both said crimp buckets (1A,3A) onto their respective wire so as to form an electrical contact between the crimp buckets and the wires.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8707064 | 1987-03-25 | ||
GB08707064A GB2202694A (en) | 1987-03-25 | 1987-03-25 | Coaxial connector |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0284320A2 EP0284320A2 (en) | 1988-09-28 |
EP0284320A3 EP0284320A3 (en) | 1990-02-28 |
EP0284320B1 true EP0284320B1 (en) | 1994-06-29 |
Family
ID=10614579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88302441A Expired - Lifetime EP0284320B1 (en) | 1987-03-25 | 1988-03-21 | Method for terminating a twisted pair screened cable |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0284320B1 (en) |
AT (1) | ATE108045T1 (en) |
DE (1) | DE3850427T2 (en) |
ES (1) | ES2058258T3 (en) |
GB (1) | GB2202694A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5066249A (en) * | 1990-12-18 | 1991-11-19 | Amp Incorporated | Coaxial subminiature connector |
US5967852A (en) * | 1998-01-15 | 1999-10-19 | Adc Telecommunications, Inc. | Repairable connector and method |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4047788A (en) * | 1976-05-24 | 1977-09-13 | Amp Incorporated | Port hole coaxial connector |
GB2170364B (en) * | 1985-01-22 | 1989-12-13 | Hellerman Deutsch Ltd | Improvements relating to electrical connectors |
-
1987
- 1987-03-25 GB GB08707064A patent/GB2202694A/en not_active Withdrawn
-
1988
- 1988-03-21 DE DE3850427T patent/DE3850427T2/en not_active Expired - Fee Related
- 1988-03-21 AT AT88302441T patent/ATE108045T1/en not_active IP Right Cessation
- 1988-03-21 ES ES88302441T patent/ES2058258T3/en not_active Expired - Lifetime
- 1988-03-21 EP EP88302441A patent/EP0284320B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0284320A2 (en) | 1988-09-28 |
GB2202694A (en) | 1988-09-28 |
DE3850427D1 (en) | 1994-08-04 |
DE3850427T2 (en) | 1995-01-19 |
ES2058258T3 (en) | 1994-11-01 |
GB8707064D0 (en) | 1987-04-29 |
ATE108045T1 (en) | 1994-07-15 |
EP0284320A3 (en) | 1990-02-28 |
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