EP0251396B1 - Branch connector for coaxial cable - Google Patents
Branch connector for coaxial cable Download PDFInfo
- Publication number
- EP0251396B1 EP0251396B1 EP87201182A EP87201182A EP0251396B1 EP 0251396 B1 EP0251396 B1 EP 0251396B1 EP 87201182 A EP87201182 A EP 87201182A EP 87201182 A EP87201182 A EP 87201182A EP 0251396 B1 EP0251396 B1 EP 0251396B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- feed
- housing
- channel
- coaxial cable
- branch connector
- 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
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Classifications
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- 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
- H01R24/54—Intermediate parts, e.g. adapters, splitters or elbows
- H01R24/542—Adapters
-
- 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 a branch connector for coaxial cable having at least one inner conductor surrounded by an inner insulation sheath, said inner sheath being surrounded by at least one outer conductor and an outer insulation sheath respectively, said branch connector comprising an elongated housing of electrically conductive material, at least one end of which being provided with a feed-through channel for receiving the coaxial cable and at least one electrically conductive tooth adapted for contacting the outer conductor of the coaxial cable, an electrically conductive penetration pin axially arranged in the housing, said penetration pin being electrically insulated from the housing, at least one end of said penetration pin having a point radially penetrating in said feed-through channel and adapted for contacting the inner conductor of the coaxial cable and having an insulation sheath for preventing electrical contact with the outer conductor of the contacted coaxial cable, and at least one clamping element for retaining the contacted coaxial cable in said feed-through channel.
- a connector cover After the cable is seated in the feed-through channel, a connector cover has to be slideably fitted over the feed-through channel, to prevent the cable from being pressed out of the feed-through channel.
- this connector cover it is required that the cable is completely received in the feed-through channel, as seen in longitudinal direction of the housing of the connector.
- the connector cover provides no relief against tensile forces in longitudinal direction of the cable. These tensile forces will be fully transferred to the penetration pin and the at least one tooth, which is not favourable to the reliability and durability of the electrical connections.
- the object of the invention is to provide a branch connector of the type referred to in the preamble, with which coaxial cables can be durably and reliably branched in one rapid and simple operation.
- the branch connector according to the invention is characterized in that said housing is circular cylindrical in shape, the penetration pin is locked inside the housing on a transverse supporting disc of insulation material, while the at least one clamping element consist of a sleeve having at one end thereof a feed-through channel corresponding to the feed-through channel of the cylindrical housing and adapted to be fitted over the jacket of the cylindrical housing such that said feed-through channels are opposite each other to form one feed-through channel for receiving the coaxial cable and a cap for coupling with said sleeve for contacting and firmly retaining the coaxial cable in the one feed-through channel.
- the coaxial cable has to be received and contacted in the feed-through channel by finger pressure.
- Such uncontrolled push-in can lead to deformation of the cable, and the possibility that the penetration pin penetrates not exactly radially in the cable, as result of which the inner conductor can be insufficiently contacted so that no reliable connection will be established, or the penetration pin may even arrive in the inner insulation sheat adjacent the inner conductor, without contacting the latter.
- said cap is a screw cap having screw thread and said sleeve is a screwed sleeve having screw thread at the end thereof provided with its feed-through channel such that said screw cap and screwed sleeve form a screw coupling.
- the penetration pin makes by means of its conducting point contact with the inner conductor of the coaxial cable to be contacted.
- the at least one tooth projects a distance less than the point of the penetration pin into the feed-through channel of the housing, said feed-through channel is defined by two approximately U-shaped notches disposed diametrically opposite each other in the jacket of the cylindrical housing, on at least one narrow edge of said notches said at least one tooth is provided.
- an approximately U-shaped supporting surface is provided inside the sleeve, said U-shaped supporting surface having openings for feeding through the penetration pin and the at least one tooth respectively, said supporting surface together with the U-shaped notches in the sleeves forming the feed-through channel thereof.
- a tubular pressure element is provided concentrically inside the cap, said pressure element being adapted to fit into the sleeve or the housing, and one closed end face of said pressure element coincides with the open end of the cap.
- the housing and the sleeve are provided with means for retaining and positioning the sleeve with respect to the housing, in such a way that in the fitted state the one feed-through channel is open for receiving the coaxial cable.
- Said retaining and position means may take the form of an engaging boss and opening, preferably a trapezoidal boss for slideably locking said sleeve and housing.
- at least one projecting trapezoidal boss is provided internally along the periphery of the sleeve between the end thereof not provided with its feed-through channel and the convex side of the supporting surface, said at least one trapezoidal boss being adapted to engage with at least one corresponding opening of the housing at the end thereof provided with its feed-through channel.
- the penetration pin is attached to a carrier strip in which the insulation material of the transverse supporting disc grips for the purpose of preventing axial and radial shifting of the penetration pin within the supporting disc, and the end of said penetration pin for penetrating into the coaxial cable being enclosed over a part by the insulation material of the supporting disc in order to prevent electrical contact with the outer conductor of the coaxial cable to be contacted.
- the supporting disc with the penetration pin is detachably locked inside the housing by an engaging boss and opening, it is with one type of housing and clamping means possible to form a branch connector with either a coaxial coupling socket or a coaxial plug output, simply by replacing the supporting disc with the penetration pin.
- both ends of the housing are provided with a feed-through channel, each of which having at least one tooth, both ends of the penetration pin having a point penetrating in a feed-through channel, wherein at each end of said housing a sleeve having a feed-through channel is fitted, such that two feed-through channels are formed for receiving a coaxial cable, and in that for coupling with each sleeve a cap being provided.
- Fig. 1 shows a cylindrical housing 1 of spring-loaded electrically conducting material with a longitudinal seam 2. This longitudinal seam is closed under the influence of the spring force of the housing itself.
- U-shaped notches 3 Formed at one end of the housing by U-shaped notches 3 is a feed-through channel 4 running through in the radial direction.
- a tooth 5 Formed at the base of each U-shaped notch is a tooth 5 which projects into the feed-through channel and has a pointed end 6 and sharp edges 7.
- the housing is provided along its periphery with circular rows of openings 8 and 9, said rows being displaced relative to each other in the longitudinal direction. From the two ends of the housing, provision is made in the longitudinal direction thereof for several slits 10 and 11, which preferably coincide with the longitudinal seam 2 as shown in Fig. 1. The slits are widened over a length at the ends of the housing.
- the penetration pin 12 of electrically conducting material to be fitted in the housing 1 is provided, at the end penetrating into the coaxial cable to be contacted, with a sharply tapered conducting point 13, in such a way that this point together with the through-running insulation material 14 - conically tapered round the pin - of the transverse supporting disc 15 forms an externally smooth surface.
- the other end of the penetration pin is designed as a socket 16 with at least one slit 18 in the longitudinal direction thereof.
- the penetration pin with the supporting disc fitted around it is subsequently fitted therein, overcoming the spring force of the housing, in such a way that the radially outward projecting bosses 17 of the supporting disc engage with the openings 9 of the housing, as shown in Fig. 2.
- the openings 9 and the projecting bosses 17 are provided in such a way that, after fitting of the penetration pin in the housing, the conducting point 13 as a whole projects further outwards into the feed-through channel 4 than the teeth 5.
- the spring force of the material of the housing has to have such strength that, on the one hand, the supporting disc can be fitted easily by hand and, on the other, the supporting disc is locked by means of the bosses 17 engaging in the openings 9, against axial and tangential displacement through forces acting thereon during normal use of the branch connector.
- the bosses 17 and the openings 9 are designed as circular in shape, it will be clear that other shapes (rectangular, square etc.) can also be used.
- the socket 16 together with the end of the housing not provided with a feed-through channel forms a coaxial coupling socket.
- the end of the penetration pin can also be designed as a contact pin, as a result of which a coaxial plug is formed (not shown).
- a coaxial cable contacted by the penetration pin and the teeth of the housing can in this way be connected simply to a coaxial junction box of a piece of equipment to be connected.
- Fig. 3 shows in perspective the fitted branch connector of Fig. 2 and a preferred embodiment of the clamping element according to the invention, in which a part thereof is "cut away” for the purpose of showing clearly the internal layout of the clamping element.
- Shown on the left of the mounted housing are the two separate parts of the clamping element for confining in the feed-through channel the coaxial cable to be contacted, namely the screwed sleeve 19 and the screw cap 20.
- the internal diameter of the screwed sleeve is slightly larger than the external diameter of the housing.
- the screw cap 20 contains internal screw thread 21 which mate with the external screw thread 22 of the screwed sleeve 19.
- the screwed sleeve has a corresponding feed-through channel 25, which is formed by U-shaped notches 23 and an approximately U-shaped supporting surface 24, for accommodation and through-feed of the coaxial cable to be contacted.
- a corresponding feed-through channel 25 which is formed by U-shaped notches 23 and an approximately U-shaped supporting surface 24, for accommodation and through-feed of the coaxial cable to be contacted.
- the supporting surface 24, along the periphery, are openings 26 and in the centre thereof an opening 27 through which - after the screwed sleeve is fitted over the housing - the teeth 5 and the penetration pin 12 project into the corresponding feed-through channel 25.
- trapezoidal bosses 28 can mate with rectangular openings 8 provided in the jacket of the housing along the periphery thereof, in such a way that when the screwed sleeve is fitted from the end of the housing provided with the feed-through channel the bosses 28 engage with the openings 8, as shown in Fig. 4.
- the fitted screwed sleeve is prevented from being displaced in the logitudinal direction of the housing under the effect of the forces acting thereon during normal use.
- the projecting bosses 17 on the supporting disc 15 and the accompanying openings 9 in the housing 1 are chosen in a different shape compared with the projecting bosses 28 of the screwed sleeve 19 and the accompanying openings 8, in order to prevent the penetration pin from being fitted wrongly into the housing through the projecting bosses 17 engaging in the openings 8.
- the teeth 5 of the housing must be sufficiently rigid to be able to penetrate without deformation through the insulating outer sheath 34 and the outer conductor 35 -generally made up of a braided wire screen and/ or a thin copper foil- of the coaxial cable.
- Making the tip 13 of the penetration pin pointed means that both coaxial cables with a solid inner conductor 37 and also an inner conductor 37 consisting of stranded wires can be contacted. 0f course, the penetration pin must also have sufficient rigidity to enable it to pass through the cable without deformation.
- the penetration pin 51 is insulated in the same way as in Fig. 1 at the end which is to penetrate into the cable, and at the other end is provided with a socket 55.
- the screwed sleeve 56 is cylindrical in shape, with an internal diameter which is slightly larger than the external diameter of the housing 48.
- the screwed sleeve has at the end provided with the screw thread 59 a corresponding feed-through channel 57, formed by U-shaped notches, but without internal supporting surface 24 as in the embodiment according to Fig. 3.
- the screw cap 60 is the same shape as the screw cap 20 according to the embodiment of Fig. 3, the diameter of the pressure element inside the screw cap 60 being such that the pressure element fits in the interior of the housing 48.
- a cable inserted in the feed-through channel is contacted in the same way as described in connection with the preferred embodiment of the invention.
- FIG. 8 A further embodiment of a branch connector according to the invention for contacting two separate coaxial cables is shown in perspective in Fig. 8.
- the other end of the housing is here also provided with a similar second feed-through channel 61 with tooth 62 and openings 67, as in the case of the branch connector with a single feed-through channel 4, tooth 5 and openings 8 in Fig. 1.
- the penetration pin 64 supported by the transverse supporting disc 63 is now formed in such a way that it has two pointed conducting points 65, 66, which each project into a feed-through channel at the two ends of the housing.
- the supporting disc 63 is locked in the housing in the same way as in the branch connector according to Fig. 1.
- the screwed sleeves 19 are locked to the houseing in the same way as shown in Fig. 4.
- Fig. 10 shows how a branching can be achieved according to the invention with the branch connector built up in a simple and universal manner.
- the coaxial cable 68 designed for example as a ring circuit, is branched by means of a branch connector according to Fig. 8, while the cable 69 for connection is provided at the other end with a branch connector according to Fig. 3 or Fig. 7. This end can then be connected to a coaxial junction box of an apparatus to be connected.
Abstract
Description
- The invention relates to a branch connector for coaxial cable having at least one inner conductor surrounded by an inner insulation sheath, said inner sheath being surrounded by at least one outer conductor and an outer insulation sheath respectively, said branch connector comprising an elongated housing of electrically conductive material, at least one end of which being provided with a feed-through channel for receiving the coaxial cable and at least one electrically conductive tooth adapted for contacting the outer conductor of the coaxial cable, an electrically conductive penetration pin axially arranged in the housing, said penetration pin being electrically insulated from the housing, at least one end of said penetration pin having a point radially penetrating in said feed-through channel and adapted for contacting the inner conductor of the coaxial cable and having an insulation sheath for preventing electrical contact with the outer conductor of the contacted coaxial cable, and at least one clamping element for retaining the contacted coaxial cable in said feed-through channel.
- A branch connector of this type is known from British patent application GB-A-2,082,850.
- Due to the great increase in the use of microcomputers, home computers, word processing equipment and their accompanying visual display terminals, printer units, memory equipment etc., it is often necessary, for the transfer of information between the various users in practice, to have a local connection network by means of which this equipment can be interconnected . In office environments in particular, it is often necessary, for the connection of equipment, to have the possibility of branching off this connection network at any desired points.
- A large number of units can be interconnected by means of coaxial cable and for that purpose have suitable coaxial junction boxes. These local interconnection networks are therefore largely built up of coaxial cable.
- In the current networks the equipment is still generally connected by means of terminal boxes. This means a T-shaped interconnection element, which is provided with coaxial junction boxes, and to each end of which a coaxial cable is connected by means of a coaxial plug. This manner of connection is fairly expensive for building up a local connection network, and it is not possible with it to make branches in a cable in use without interruption the stream of information flowing through it.
- With the branch connector disclosed by the above-mentioned British patent application, branching of a cable in use can be achieved, but this requires two successive operations. First, the coaxial cable to be branched must be confined in the feed-through channel using finger pressure, in which for contacting said cable an adequate amount of force is required. Particularly for a stiff cable, i.e. a cable with insulation sheats of a mechanically hard to penetrate material or a cable with relative thick conductors, a considerable amount of force may be required.
- After the cable is seated in the feed-through channel, a connector cover has to be slideably fitted over the feed-through channel, to prevent the cable from being pressed out of the feed-through channel. In order to fit this connector cover, it is required that the cable is completely received in the feed-through channel, as seen in longitudinal direction of the housing of the connector. When part of the periphery of the cable protrudes the feed-through channel, it is not possible or just very difficult to fit this connector cover, in which there is also a possibility that the outer insulation sheat of the cable may be damaged by the connector cover sliding over the cable. Further, the connector cover provides no relief against tensile forces in longitudinal direction of the cable. These tensile forces will be fully transferred to the penetration pin and the at least one tooth, which is not favourable to the reliability and durability of the electrical connections.
- In view of the above-described disadvantages, the object of the invention is to provide a branch connector of the type referred to in the preamble, with which coaxial cables can be durably and reliably branched in one rapid and simple operation. The branch connector according to the invention is characterized in that said housing is circular cylindrical in shape, the penetration pin is locked inside the housing on a transverse supporting disc of insulation material, while the at least one clamping element consist of a sleeve having at one end thereof a feed-through channel corresponding to the feed-through channel of the cylindrical housing and adapted to be fitted over the jacket of the cylindrical housing such that said feed-through channels are opposite each other to form one feed-through channel for receiving the coaxial cable and a cap for coupling with said sleeve for contacting and firmly retaining the coaxial cable in the one feed-through channel.
- As before mentioned, in the British patent application the coaxial cable has to be received and contacted in the feed-through channel by finger pressure. Such uncontrolled push-in can lead to deformation of the cable, and the possibility that the penetration pin penetrates not exactly radially in the cable, as result of which the inner conductor can be insufficiently contacted so that no reliable connection will be established, or the penetration pin may even arrive in the inner insulation sheat adjacent the inner conductor, without contacting the latter.
- By coupling together the sleeve and the cap according to the invention, a controlled force is exerted radially on the coaxial cable. Under the influence of this force, the penetration pin and the at least one tooth successfully penetrate into the cable for contacting the inner and the outer conductor, respectively. In contacted state, the cable is firmly confined between the cap and the sleeve, as a result of which the electrical connections are relieved of tensile forces in longitudinal direction of the cable.
- In a preferred embodiment of the invention said cap is a screw cap having screw thread and said sleeve is a screwed sleeve having screw thread at the end thereof provided with its feed-through channel such that said screw cap and screwed sleeve form a screw coupling.
- In contacted state only the penetration pin makes by means of its conducting point contact with the inner conductor of the coaxial cable to be contacted. Accordingly, in a further embodiment of the invention wherein the feed-through channel of the housing is accessible from said one end thereof, the at least one tooth projects a distance less than the point of the penetration pin into the feed-through channel of the housing, said feed-through channel is defined by two approximately U-shaped notches disposed diametrically opposite each other in the jacket of the cylindrical housing, on at least one narrow edge of said notches said at least one tooth is provided.
- In order to obtain an evenly distributed force on the cable for avoidance as far as possible of deformation of the cable during contacting, in the preferred embodiment of the invention an approximately U-shaped supporting surface is provided inside the sleeve, said U-shaped supporting surface having openings for feeding through the penetration pin and the at least one tooth respectively, said supporting surface together with the U-shaped notches in the sleeves forming the feed-through channel thereof.
- With the same object of providing an evenly distributed force on the cable when contacting, in another embodiment of the invention a tubular pressure element is provided concentrically inside the cap, said pressure element being adapted to fit into the sleeve or the housing, and one closed end face of said pressure element coincides with the open end of the cap.
- In order to avoid displacement of the contacted coaxial cable in longitudinal direction of the housing, in a yet further embodiment of the invention the housing and the sleeve are provided with means for retaining and positioning the sleeve with respect to the housing, in such a way that in the fitted state the one feed-through channel is open for receiving the coaxial cable.
- Said retaining and position means may take the form of an engaging boss and opening, preferably a trapezoidal boss for slideably locking said sleeve and housing. In the embodiment of the connector having a sleeve provided with the U-shaped supporting surface, at least one projecting trapezoidal boss is provided internally along the periphery of the sleeve between the end thereof not provided with its feed-through channel and the convex side of the supporting surface, said at least one trapezoidal boss being adapted to engage with at least one corresponding opening of the housing at the end thereof provided with its feed-through channel.
- In order to avoid faulty contacts as much as possible, one must also prevent the penetration pin from moving in axial and/or radial direction inside the housing. In the preferred embodiment of the invention, the penetration pin is attached to a carrier strip in which the insulation material of the transverse supporting disc grips for the purpose of preventing axial and radial shifting of the penetration pin within the supporting disc, and the end of said penetration pin for penetrating into the coaxial cable being enclosed over a part by the insulation material of the supporting disc in order to prevent electrical contact with the outer conductor of the coaxial cable to be contacted.
- By designing the other end of the penetration pin as a contact socket or contact pin, one forms with the end of the circular cylindrical housing, not provided with the one feed-through channel, either a coaxial coupling socket or a coaxial plug for connecting in a simple manner the cable or equipment to be connected. It will be clear that the branch connector designed in this way according to the invention can also advantageously be used as the end connector for a coaxial cable.
- Because, according to a further embodiment of the invention the supporting disc with the penetration pin is detachably locked inside the housing by an engaging boss and opening, it is with one type of housing and clamping means possible to form a branch connector with either a coaxial coupling socket or a coaxial plug output, simply by replacing the supporting disc with the penetration pin.
- If a branch with a plug connection is not desired or necessary, for example if an additional coaxial cable has to be used between the branch point and the equipment for connection, in another embodiment of the branch connector according to the invention both ends of the housing are provided with a feed-through channel, each of which having at least one tooth, both ends of the penetration pin having a point penetrating in a feed-through channel, wherein at each end of said housing a sleeve having a feed-through channel is fitted, such that two feed-through channels are formed for receiving a coaxial cable, and in that for coupling with each sleeve a cap being provided.
- The invention will now be explained in greater detail with reference to the examples of embodiments shown in the drawings.
- Fig. 1 shows a drawing in perspective with disassembled parts of a preferred embodiment of the housing and the penetration pin of the branch connector according to the invention;
- Fig. 2 shows in perspective the housing of the branch connector according to Fig. 1, with the penetration pin fitted therein, partially shown by dotted lines;
- Fig. 3 shows a drawing in perspective with disassembled and "cutaway" parts of a preferred embodiment of a clamping element of the branch connector according to the invention, together with the fitted branch connector from Fig. 2;
- Fig. 4 shows a drawing in perspective with "cutaway" parts of the preferred embodiment of the branch connector according to Fig. 3, in which part of the clamping element is fitted over the housing;
- Fig. 5 shows on an enlarged scale with "cutaway" parts a preferred embodiment of the branch connector according to the invention, with a contacted coaxial cable confined therein;
- Fig. 6 shows in various stages and views the structure of the penetration pin and the supporting disc according to the preferred embodiment of the present invention;
- Fig. 7 shows a further embodiment of a branch connector according to the present invention;
- Fig. 8 shows a drawing in perspective with disassembled and "cutaway" parts of a further preferred embodiment of the branch connector according to the invention for contacting of two coaxial cables;
- Fig. 9 shows a drawing in perspective with "cutaway" parts of the preferred embodiment of the branch connector according to Fig. 8, in the partially fitted state; and
- Fig. 10 shows a branching of a coaxial cable by means of branch connectors according to Fig. 4 and Fig. 9.
- The preferred embodiment of the branch connector according to the invention illustrated in Fig. 1 shows a
cylindrical housing 1 of spring-loaded electrically conducting material with alongitudinal seam 2. This longitudinal seam is closed under the influence of the spring force of the housing itself. Formed at one end of the housing by U-shapednotches 3 is a feed-through channel 4 running through in the radial direction. Formed at the base of each U-shaped notch is atooth 5 which projects into the feed-through channel and has apointed end 6 andsharp edges 7. The housing is provided along its periphery with circular rows ofopenings several slits longitudinal seam 2 as shown in Fig. 1. The slits are widened over a length at the ends of the housing. - The
penetration pin 12 of electrically conducting material to be fitted in thehousing 1 is provided, at the end penetrating into the coaxial cable to be contacted, with a sharply tapered conductingpoint 13, in such a way that this point together with the through-running insulation material 14 - conically tapered round the pin - of the transverse supportingdisc 15 forms an externally smooth surface. In the embodiment shown in Fig. 1 the other end of the penetration pin is designed as asocket 16 with at least oneslit 18 in the longitudinal direction thereof. - The penetration pin with the supporting disc fitted around it is subsequently fitted therein, overcoming the spring force of the housing, in such a way that the radially outward projecting
bosses 17 of the supporting disc engage with theopenings 9 of the housing, as shown in Fig. 2. Theopenings 9 and the projectingbosses 17 are provided in such a way that, after fitting of the penetration pin in the housing, the conductingpoint 13 as a whole projects further outwards into the feed-through channel 4 than theteeth 5. - It will be clear that the spring force of the material of the housing has to have such strength that, on the one hand, the supporting disc can be fitted easily by hand and, on the other, the supporting disc is locked by means of the
bosses 17 engaging in theopenings 9, against axial and tangential displacement through forces acting thereon during normal use of the branch connector. Although thebosses 17 and theopenings 9 are designed as circular in shape, it will be clear that other shapes (rectangular, square etc.) can also be used. - As can be seen clearly from Fig. 2, the
socket 16 together with the end of the housing not provided with a feed-through channel forms a coaxial coupling socket. It will be clear that, instead of being designed as a socket, the end of the penetration pin can also be designed as a contact pin, as a result of which a coaxial plug is formed (not shown). A coaxial cable contacted by the penetration pin and the teeth of the housing can in this way be connected simply to a coaxial junction box of a piece of equipment to be connected. By means of theslits - Fig. 3 shows in perspective the fitted branch connector of Fig. 2 and a preferred embodiment of the clamping element according to the invention, in which a part thereof is "cut away" for the purpose of showing clearly the internal layout of the clamping element. Shown on the left of the mounted housing are the two separate parts of the clamping element for confining in the feed-through channel the coaxial cable to be contacted, namely the screwed
sleeve 19 and thescrew cap 20. The internal diameter of the screwed sleeve is slightly larger than the external diameter of the housing. Thescrew cap 20 containsinternal screw thread 21 which mate with theexternal screw thread 22 of the screwedsleeve 19. At the end provided with screw thread, the screwed sleeve has a corresponding feed-throughchannel 25, which is formed byU-shaped notches 23 and an approximately U-shaped supportingsurface 24, for accommodation and through-feed of the coaxial cable to be contacted. In the supportingsurface 24, along the periphery, areopenings 26 and in the centre thereof anopening 27 through which - after the screwed sleeve is fitted over the housing - theteeth 5 and thepenetration pin 12 project into the corresponding feed-throughchannel 25. - Formed on the inside at the end of the screwed sleeve which is not provided with screw thread are radially projecting
trapezoidal bosses 28, of which oneslanting side 29 rests against the open end of the screwed sleeve, and of which the otherstraight side 30 is adjacent to the convex side of the supportingsurface 24. Only one of suchtrapezoidal bosses 28 can be seen in the drawing in Fig. 3. - These
trapezoidal bosses 28 can mate withrectangular openings 8 provided in the jacket of the housing along the periphery thereof, in such a way that when the screwed sleeve is fitted from the end of the housing provided with the feed-through channel thebosses 28 engage with theopenings 8, as shown in Fig. 4. Through thestraight side 30 of the respectivetrapezoidal bosses 28 and the convex side of the supportingsurface 24, the fitted screwed sleeve is prevented from being displaced in the logitudinal direction of the housing under the effect of the forces acting thereon during normal use. The relative placing and dimensions of thetrapezoidal bosses 28 and theopenings 8 in the housing are chosen in such a way that the screwed sleeve can be locked to the housing only in that position in whcih the feed-throughchannels 4 and 25 of the housing and the screwed sleeve respectively lie opposite each other. The convex side of the supportingsurface 24 and theU-shaped notches 3 of the housing have such dimensions that the convex part of the supporting surface fits into these notches. Together with thetrapoezoidal bosses 28, this in an effective manner prevents the screwed sleeve from turning in the tangential direction as a result of the screw cap being screwed on the screwed sleeve. - The projecting
bosses 17 on the supportingdisc 15 and the accompanyingopenings 9 in thehousing 1 are chosen in a different shape compared with the projectingbosses 28 of the screwedsleeve 19 and the accompanyingopenings 8, in order to prevent the penetration pin from being fitted wrongly into the housing through the projectingbosses 17 engaging in theopenings 8. - The
openings 70 along the periphery of the supportingsurface 24 are produced for manufacturing reasons during the formation of thetrapezoidal bosses 28. Thegrooves 71 in the wall of the screwedsleeve 19 serve purely to save material. - The screw cap contains a
pressure element 31 which fits concentrically in tubular form in the interior of the screwed sleeve, and whoseclosed end face 32 coincides with the face bounded by theedge 33 of the open end of the screw cap. - When in the assembly shown in Fig. 4 a coaxial cable is inserted into the corresponding feed-through
channel 25, through tightening of the screw cap on the screwed sleeve, the cable can be moved in the longitudinal direction of the housing under the effect of the pressure exerted through thepressure face 32 and theedge 33. First of all here, the conductingpoint 13 of the penetration pin penetrates into the insulatingouter sheath 34 of the coaxial cable, shown in Fig. 5. Further tightening of the screw cap results in thepoint 13 successively penetrating through theouter conductor 35 and the insulatinginner sheath 36 to theinner conductor 37 of the coaxial cable. After some time theteeth 5 also penetrate into the outer sheath, the outer conductor and the inner sheath. - If it is now ensured that the distance between the
pointed end 6 of thetooth 5 and the base of thepoint 13 is greater than the thickness of theouter conductor 35 of the coaxial cable to be contacted, thepoint 13 and thetooth 5 cannot make contact simultaneously with the outer conductor, so that short-circuiting of the tooth and the penetration pin is prevented. In the final situation shown in Fig. 5 the cable sits, under the influence of the clamping action of the screwed sleeve and the screw cap, firmly retained in the feed-throughchannel 25. - It will be clear that the cable is both contacted and clamped in the feed-through channel in one operation, namely tightening of the screw cap on the screwed sleeve. Through the
pressure element 31 and the shape of the feed-throughchannel 25 corresponding to the round cable and the curved supportingface 24 in the screwedsleeve 19, the cable is prevented from being deformed during the contacting, in such a way that theconducting point 13 of the penetration pin does not penetrate radially into the cable and consequently will not make contact with theinner conductor 37 of the cable. - The screwed sleeve and the screw cap are provided with
external ridges - The
teeth 5 of the housing must be sufficiently rigid to be able to penetrate without deformation through the insulatingouter sheath 34 and the outer conductor 35 -generally made up of a braided wire screen and/ or a thin copper foil- of the coaxial cable. Making thetip 13 of the penetration pin pointed means that both coaxial cables with a solidinner conductor 37 and also aninner conductor 37 consisting of stranded wires can be contacted. 0f course, the penetration pin must also have sufficient rigidity to enable it to pass through the cable without deformation. - Fig. 6 illustrates how the
penetration pin 12, thesocket 16 and the supportingdisc 15 are connected together in the preferred embodiment of the present invention. In thecarrier strip 40 of electrically conducting material anopening 41 is provided in such a way thatlips 42 which are bent from the position shown by the dotted line perpendicular to the plane of the drawing in Fig. 6a are thereby formed. The electrically conductingpenetration pin 12 is clamped between these bent-overlips 42 at a distance from thecarrier strip 40. Thesocket 16, thedevelopment 43 of which is shown by dotted lines in Fig. 6a, is fixed with the lips 44 - bent inwards perpendicular to the plane of the drawing - on the end opposite thepointed end 13 of the penetration pin around the latter. Fig. 6b shows the top view of the system thus formed, seen from thepoint 13 of the penetration pin. - Subsequently, by means of, for example an injection-moulding process, the supporting
disc 15 is formed round the penetration pin and part of thesocket 16, as shown in Fig. 6c. Material of the supporting disc penetrates in the process into theopening 41 of the carrier strip and theholes 45 of the socket, which provides in an eficient manner a barrier against axial shifting of the socket and the penetration pin in the supporting disc. The whole is then separated from the adjacent carrier strips on either side at the level of the side faces 46 which were produced during formation of the supporting disc such that they lie inwards relative to the periphery thereof. The surfaces of fracture of the carrier strip are indicated by 47 (see also Fig. 1). The fact that the surfaces offracture 47 lie inwards relative to the periphery of the supporting disc means that they are prevented in the mounted state from making electrical contact with the housing. - Fig. 7 shows another partially "cutaway" embodiment of the branch connector according to the invention. At one end of the
cylindrical housing 48, as in the embodiment according to Fig. 1, provision is made for U-shaped notches which form a feed-throughchannel 49 with projectingteeth 72 therein. The supportingdisc 50 with thepenetration pin 51 projecting into the feed-throughchannel 49 is held clamped here between rows - displaced relative to each other in the longitudinal direction of the housing - of spring-loadedlips 52 projecting inwards radially along the periphery thereof andelevations 53. These lips and elevations are formed as bent-through parts of the cylindrical jacket of the housing. At the end of thehousing 48 which is provided with the feed-through channel provision is made for short radially outward projectinglips 54. Thepenetration pin 51 is insulated in the same way as in Fig. 1 at the end which is to penetrate into the cable, and at the other end is provided with asocket 55. The screwedsleeve 56 is cylindrical in shape, with an internal diameter which is slightly larger than the external diameter of thehousing 48. The screwed sleeve has at the end provided with the screw thread 59 a corresponding feed-throughchannel 57, formed by U-shaped notches, but without internal supportingsurface 24 as in the embodiment according to Fig. 3. Provided on this same end internally in the longitudinal direction of the screwed sleeve around the periphery thereof areshort grooves 58, of such dimensions that thelips 54 of thehousing 48 fit into thesegrooves 58. These lips and grooves work together in such a way that when the screwed sleeve is slid over the housing, from the end of the housing not provided with the feed-through channel, the screwed sleeve is held and positioned in such a way that the feed-throughchannels housing 48 and screwedsleeve 56 respectively lie opposite each other and form a feed-through channel which is open for receiving the coaxial cable. Thescrew cap 60 is the same shape as thescrew cap 20 according to the embodiment of Fig. 3, the diameter of the pressure element inside thescrew cap 60 being such that the pressure element fits in the interior of thehousing 48. A cable inserted in the feed-through channel is contacted in the same way as described in connection with the preferred embodiment of the invention. When thescrew cap 60 is screwed onto the screwedsleeve 56, the latter is locked by means of thelips 54 and thegrooves 58 against turning in the tangential direction. - A further embodiment of a branch connector according to the invention for contacting two separate coaxial cables is shown in perspective in Fig. 8. The other end of the housing is here also provided with a similar second feed-through
channel 61 withtooth 62 andopenings 67, as in the case of the branch connector with a single feed-through channel 4,tooth 5 andopenings 8 in Fig. 1. Thepenetration pin 64 supported by the transverse supportingdisc 63 is now formed in such a way that it has two pointed conductingpoints disc 63 is locked in the housing in the same way as in the branch connector according to Fig. 1. The screwedsleeves 19 are locked to the houseing in the same way as shown in Fig. 4. - A coaxial cable can now be inserted in both feed-through
channels 4, 61, and is contacted in the same way as that described for the branch connector for a single cable. The fitted assembly of two of the same screwedsleeves 19 with the screw thread ends facing away from each other is shown in Fig. 9. - Fig. 10 shows how a branching can be achieved according to the invention with the branch connector built up in a simple and universal manner. The
coaxial cable 68, designed for example as a ring circuit, is branched by means of a branch connector according to Fig. 8, while thecable 69 for connection is provided at the other end with a branch connector according to Fig. 3 or Fig. 7. This end can then be connected to a coaxial junction box of an apparatus to be connected. - It goes without saying that the invention is not restricted to the embodiments discussed above and shown in the figures, but that modifications and additions can be provided, for example in the numbers of teeth, the locking of the penetration pin in the housing, or the way in which the separate parts of the clamping element are connected together, for example instead of screw thread, by means of a "snap connection" etc., without going beyond the scope of the invention as defined in the appended claims.
Claims (13)
- A branch connector for coaxial cable (68;69) having at least one inner conductor (37) surrounded by an inner insulation sheath (36), said inner sheath (36) being surrounded by at least one outer conductor (35) and an outer insulation sheath (34) respectively, said branch connector comprising an elongated housing (1;48) of electrically conductive material, at least one end of which being provided with a feed-through channel (4;49;61) for receiving the coaxial cable (68;69) and at least one electrically conductive tooth (5;62;72) adapted for contacting the outer conductor (35) of the coaxial cable (68;69), an electrically conductive penetration pin (12;51;64) axially arranged in the housing (1;48), said penetration pin (12;51;64) being electrically insulated from the housing (1;48), at least one end of said penetration pin (12;51;64) having a point (13;65;66) radially penetrating in said feed-through channel (4;49;61) and adapted for contacting the inner conductor (37) of the coaxial cable (68;69) and having an insulation sheath (14) for preventing electrical contact with the outer conductor (35) of the contacted coaxial cable (68;69), and at least one clamping element (19,20;56,60) for retaining the contacted coaxial cable (68;69) in said feed-through channel (4;49;61), characterized in that said housing (1;48) is circular cylindrical in shape, the penetration pin (12;51;64) is locked inside the housing (1;48) on a transverse supporting disc (15;50;63) of insulation material, while the at least one clamping element consist of a sleeve (19;56), having at one end thereof a feed-through channel (25;57) corresponding to the feed-through channel (4;49;61) of the cylindrical housing (1;48) and adapted to be fitted over the jacket of the cylindrical housing (1;48) such that said feed-through channels (4;49;61:25;57) are opposite each other to form one feed-through channel for receiving the coaxial cable (68;69), and a cap (20;60) for coupling with said sleeve (19;56) for contacting and firmly retaining the coaxial cable (68;69) in the one feed-through channel.
- A branch connector according to claim 1, characterized in that said cap (20;60) is a screw cap having screw thread (21) and said sleeve (19;56) is a screwed sleeve having screw thread (22;59) at the end thereof provided with its feed-through channel (25;57), such that said screw cap and screwed sleeve form a screw coupling.
- A branch connector according to claim 1 or 2, characterized in that the feed-through channel (4;49;61) of the housing (1;48) is accessible from said one end thereof, the at least one tooth (5;62;72) projects a distance less than the point (13;65;66) of the penetration pin (12;51;64) into the feed-through channel (4;49;61) of the housing (1;48), said feed-through channel (4;49;61) is defined by two approximately U-shaped notches (3) disposed diametrically opposite each other in the jacket of the cylindrical housing (1;48), on at least one narrow edge of said notches (3) said at least one tooth (5;62;72) is provided.
- A branch connector according to claim 3, characterized in that an approximately U-shaped supporting surface (24) is provided inside the sleeve (19), said U-shaped supporting surface (24) having openings (27;26) for feeding through the penetration pin (12;64) and the at least one tooth (5;62) respectively, said supporting surface (24) together with the U-shaped notches (23) in the sleeves (19) forming the feed-through channel (25) thereof.
- A branch connector according to claim 1, 2, 3 or 4, characterized in that the housing (1;48) and the sleeve (19;56) are provided with means (8,67,28;54,58) for retaining and positioning the sleeve (19;56) with respect to the housing (1;48), in such a way that in the fitted state the one feed-through channel is open for receiving the coaxial cable (68;69).
- A branch connector according to claim 5 dependent on claim 4, characterized in that at least one projecting trapezoidal boss (28) is provided internally along the periphery of the sleeve (19) between the end thereof not provided with its feed-through channel (25) and the convex side of the supporting surface (24), said at least one trapezoidal boss (28) being adapted to engage with at least one corresponding opening (8;67) of the housing (1) at the end thereof provided with its feed-through channel (4;61).
- A branch connector according to one or more of the preceding claims, characterized in that a tubular pressure element (31) is provided concentrically inside the cap (20;60), said pressure element (31) being adapted to fit into the sleeve (19) or the housing (48), and one closed end face (32) of said pressure element (31) coincides with the open end of the cap (20;60).
- A branch connector according to one or more of the preceding claims, characterized in that the penetration pin (12;51;64) is attached to a carrier strip (40) in which the insulation material of the transverse supporting disc (15;50;63) grips for the purpose of preventing axial and radial shifting of the penetration pin (12;51;64) within the supporting disc (15;50;63), and the end of said penetration pin (12;51;64) for penetrating into the coaxial cable (68;69) being enclosed over a part (14) by the insulation material of the supporting disc (15;50;63), in order to prevent electrical contact with the outer conductor (35) of the coaxial cable (68;69) to be contacted.
- A branch connector according to one or more of the preceding claims, characterized in that the housing (1;48) is provided with locking means (9;52,53) in order to prevent displacement of the penetration pin (12;51;64) in axial and tangential direction with respect to the housing (1;48), said locking means (9;52,53) are formed such that the supporting disc (15;50;63) with the penetration pin (12;51;64) is detachably locked inside the housing (1;48).
- A branch connector according to claim 9, characterized in that the locking means includes at least one boss (17) which projects radially outwards on the periphery of the supporting disc (15;63) and is adapted to engage in at least one corresponding opening (9) provided in the jacket of the cylindrical housing (1).
- A branch connector according to one or more of the preceding claims, characterized in that the other end of the conductive penetration pin (12;51;64) is designed as a socket (16;55), said socket (16;55) together with the other end of the circular cylindrical housing (1;48) not provided with its feed-through channel (4;49;61) forms a coaxial coupling socket.
- A branch connector according to one or more of the claims 1 to 10, characterized in that the other end of the conductive penetration pin (12;51;64) is designed as a contact pin, and together with the other end of the circular cylindrical housing (1;48) not provided with its feed-through channel (4;49;61) forms a coaxial plug.
- A branch connector according to one or more of the claims 1 to 10, characterized in that both ends of the housing (1) are provided with a feed-through channel (4;61), each of which having at least one tooth (5;62), both ends of the penetration pin (64) having a point (65;66) penetrating in a feed-through channel (4;61), wherein at each end of said housing (1) a sleeve (19) having a feed-through channel (25) is fitted, such that two feed-through channels are formed for receiving a coaxial cable (68;69), and in that for coupling with each sleeve (19) a cap (20;60) being provided.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT87201182T ATE80757T1 (en) | 1986-06-20 | 1987-06-19 | BREAK CONNECTION FOR COAXIAL CABLE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8601616A NL8601616A (en) | 1986-06-20 | 1986-06-20 | BRANCH CONNECTOR FOR COAXIAL CABLE. |
NL8601616 | 1986-06-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0251396A1 EP0251396A1 (en) | 1988-01-07 |
EP0251396B1 true EP0251396B1 (en) | 1992-09-16 |
Family
ID=19848201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87201182A Expired - Lifetime EP0251396B1 (en) | 1986-06-20 | 1987-06-19 | Branch connector for coaxial cable |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0251396B1 (en) |
JP (1) | JP2513698B2 (en) |
KR (1) | KR950012473B1 (en) |
AT (1) | ATE80757T1 (en) |
AU (1) | AU602900B2 (en) |
BR (1) | BR8703061A (en) |
CA (1) | CA1288489C (en) |
DE (1) | DE3781727T2 (en) |
HK (1) | HK6593A (en) |
NL (1) | NL8601616A (en) |
SG (1) | SG113992G (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7650055B2 (en) | 2007-05-31 | 2010-01-19 | Corning Cable Systems Llc | Terminal with internal environmental seal |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2647970B1 (en) * | 1989-05-31 | 1991-08-16 | Cegelec | CONNECTION TAKE FOR CABLE, ESPECIALLY FOR PAIR ARMORED CABLE |
GB9212625D0 (en) * | 1992-06-15 | 1992-07-29 | Raychem Sa Nv | Cable sealing device |
GB9927925D0 (en) * | 1999-11-25 | 2000-01-26 | Radiall Limited | Coaxial connector link |
CN103221863B (en) | 2010-10-28 | 2016-06-01 | 康宁光缆系统有限责任公司 | Shock resistance fiber optic enclosure and correlation technique |
US9069151B2 (en) | 2011-10-26 | 2015-06-30 | Corning Cable Systems Llc | Composite cable breakout assembly |
US8873926B2 (en) | 2012-04-26 | 2014-10-28 | Corning Cable Systems Llc | Fiber optic enclosures employing clamping assemblies for strain relief of cables, and related assemblies and methods |
DE102017214767B4 (en) * | 2017-08-23 | 2019-12-05 | Te Connectivity Germany Gmbh | Shielding sleeve for shielded electrical cables with a receptacle for a spreading forceps |
CN116111412B (en) * | 2022-12-30 | 2023-09-29 | 宁远县硕宁电子有限公司 | Power socket branching structure |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB888213A (en) * | 1959-02-18 | 1962-01-31 | Ass Elect Ind | Improvements relating to electrical connecting devices |
US4365859A (en) * | 1980-08-22 | 1982-12-28 | Bunker Ramo Corporation | Coaxial tap connector |
DE3340943A1 (en) * | 1983-11-11 | 1985-05-23 | Siemens AG, 1000 Berlin und 8000 München | Device for the joint-free contacting of the inner and outer conductors of a coaxial cable |
-
1986
- 1986-06-20 NL NL8601616A patent/NL8601616A/en not_active Application Discontinuation
-
1987
- 1987-06-16 CA CA000539769A patent/CA1288489C/en not_active Expired - Lifetime
- 1987-06-17 AU AU74417/87A patent/AU602900B2/en not_active Ceased
- 1987-06-18 JP JP62150349A patent/JP2513698B2/en not_active Expired - Lifetime
- 1987-06-18 BR BR8703061A patent/BR8703061A/en unknown
- 1987-06-19 AT AT87201182T patent/ATE80757T1/en not_active IP Right Cessation
- 1987-06-19 DE DE8787201182T patent/DE3781727T2/en not_active Expired - Fee Related
- 1987-06-19 EP EP87201182A patent/EP0251396B1/en not_active Expired - Lifetime
- 1987-06-19 KR KR1019870006205A patent/KR950012473B1/en not_active IP Right Cessation
-
1992
- 1992-11-02 SG SG1139/92A patent/SG113992G/en unknown
-
1993
- 1993-01-28 HK HK65/93A patent/HK6593A/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7650055B2 (en) | 2007-05-31 | 2010-01-19 | Corning Cable Systems Llc | Terminal with internal environmental seal |
Also Published As
Publication number | Publication date |
---|---|
JPS6366867A (en) | 1988-03-25 |
CA1288489C (en) | 1991-09-03 |
EP0251396A1 (en) | 1988-01-07 |
BR8703061A (en) | 1988-03-08 |
AU7441787A (en) | 1987-12-24 |
DE3781727T2 (en) | 1993-04-01 |
AU602900B2 (en) | 1990-11-01 |
NL8601616A (en) | 1988-01-18 |
JP2513698B2 (en) | 1996-07-03 |
KR950012473B1 (en) | 1995-10-18 |
DE3781727D1 (en) | 1992-10-22 |
KR880001072A (en) | 1988-03-31 |
ATE80757T1 (en) | 1992-10-15 |
HK6593A (en) | 1993-02-05 |
SG113992G (en) | 1992-12-24 |
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