CA1268243A - Modular jack for plug-in communication terminals and method of moulding same - Google Patents
Modular jack for plug-in communication terminals and method of moulding sameInfo
- Publication number
- CA1268243A CA1268243A CA000516674A CA516674A CA1268243A CA 1268243 A CA1268243 A CA 1268243A CA 000516674 A CA000516674 A CA 000516674A CA 516674 A CA516674 A CA 516674A CA 1268243 A CA1268243 A CA 1268243A
- Authority
- CA
- Canada
- Prior art keywords
- terminal
- shell
- plug
- cavity
- modular jack
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0293—Terminal boxes for telephone sets
-
- 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
- H01R13/73—Means for mounting coupling parts to apparatus or structures, e.g. to a wall
- H01R13/74—Means for mounting coupling parts in openings of a panel
-
- 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
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
- H01R4/2416—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type
- H01R4/242—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members being plates having a single slot
- H01R4/2425—Flat plates, e.g. multi-layered flat plates
- H01R4/2429—Flat plates, e.g. multi-layered flat plates mounted in an insulating base
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/16—Connectors or connections adapted for particular applications for telephony
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Connector Housings Or Holding Contact Members (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
MODULAR JACK FOR PLUG-IN COMMUNICATION
TERMINALS AND METHOD OF MOULDING SAME
Abstract of the Disclosure A modular jack includes a one piece shell carrying terminals within a cavity of the shell, and a plug receptacle for electrical connection to the terminals. A transmission line, such as a telephone line, is connected to the terminals, and the modular jack is mounted to a support structure, such as a wall, so that the cavity faces the wall. A plug connected to a plug-in terminal, such as a plug-in telephone, is inserted in the receptacle to connect the telephone to the telephone line. The one piece shell of the modular jack replaces the two piece base and cover assembly of previously known plug-in telephone jacks. The shell may be moulded with insulation displacement terminal strips partially embedded therein.
TERMINALS AND METHOD OF MOULDING SAME
Abstract of the Disclosure A modular jack includes a one piece shell carrying terminals within a cavity of the shell, and a plug receptacle for electrical connection to the terminals. A transmission line, such as a telephone line, is connected to the terminals, and the modular jack is mounted to a support structure, such as a wall, so that the cavity faces the wall. A plug connected to a plug-in terminal, such as a plug-in telephone, is inserted in the receptacle to connect the telephone to the telephone line. The one piece shell of the modular jack replaces the two piece base and cover assembly of previously known plug-in telephone jacks. The shell may be moulded with insulation displacement terminal strips partially embedded therein.
Description
L2~i~32~
~lODULAR JACK FOR PLUG-IN COMMUNICATION
TERMINALS AND METHOD OF MOULDING SAME
This invention rela-tes to modular jacks for electrically connecting plug-in communications terminals to communications transmission lines and a method oF moulding such jacks.
Typical known modular jacks for connecting plug-in communications terminals, such as telephones, to communications transmission lines, such as telephone lines, comprise a base of a housing for mounting to a wall or similar support structure, screw terminals carried by the base for terminating the transmission line, a plug receptacle carried by the base and electrically connected to the screw terminals for receiving a plug of the plug-in terminal, and a cover of the housing which fits over the base to enclose the terminals. Other known jacks for connecting plug-in telephones to telephone lines have screw terminals carried by the base and a plug receptacle carried by the cover, conductive spring contacts being provided to electrically connect the terminals to the plug receptacle when the cover is fitted to the base (see for example, U.S. Patent No.
4,050,768 issued to B.W. Gumb on the 27th September 1977).
According to the present invention there is provided a modular jack for electrically connecting a plug-in communications terminal to a communications transmission line, the jack comprising: a housing consisting of a one piece shell defining a cavity, the shell having an opening therethrough into the cavity and an inlet for permitting entry of the transmission line into the cavity; terminal means carried by the shell inside the cavity for terminating the transmission line, the terminal means being accessible through the .
32~;~
. ~
opening; and plug receiving means carried by the shell and accessible from outside the shell for receiving plug means of the plug-in terminal, and for electrical connection to the terminal means, the jack being mountable to a support structure to close the opening.
Thus, modular jacks constructed according to the present invention rely on a housing consistiny of a one piece shell to support and protect a connection between a plug-in terminal and a transmission line, whereas previously known modular jacks rely on a housing consisting of a separable base and cover to perform these functions. In view of this, modular jacks according to the present invention have fewer housing parts, and therefore may be more economical to manufacture and easier to install and remove than previously known jacks.
Modular jacks according to the invention may be mounted to a support structure by any convenient means. For example, a boss carried by the shell may be provided, the boss having a bore therethrough for passage of a screw to secure the shell to a support structure. Alternatively, a fastening device such as a spring clip may be mounted on the support structure for location across the shell to secure the shell to the support structure.
According to another aspect of the invention there is provided a method of moulding a shell for a modular jack, comprising:
mounting a plurality of insulation displacement terminal strips in recesses provided in a moulding surface of at least one mould body, with the strips having portions projecting from the moulding surface;
relatively moving the at least one mould body and at least one other mould body into positions in which moulding surfaces of the mould bodies define a mould cavity in the shape of the shell, and with the strip portions projecting into the mould cavi-ty; injecting flowable plastics material into the mould cavity to fill and surround the terminal portion, the plastics material after solidifying forming the shell with the terminal portions embedded in the shell.
An embodiment of the invention will now be described in the following with reference to the accompanying drawings, in which:
Figure 1 is an exploded perspective view of a typical prior art modular jack;
Figure 2 is a plan view of a modular jack constructed according to an embodiment of the invention;
Figure 3 is a cross-sectional view of the jack of Figure 2 taken along section line III-III in Figure 2;
Figure 4 is an end elevation view of the jack of Figure
~lODULAR JACK FOR PLUG-IN COMMUNICATION
TERMINALS AND METHOD OF MOULDING SAME
This invention rela-tes to modular jacks for electrically connecting plug-in communications terminals to communications transmission lines and a method oF moulding such jacks.
Typical known modular jacks for connecting plug-in communications terminals, such as telephones, to communications transmission lines, such as telephone lines, comprise a base of a housing for mounting to a wall or similar support structure, screw terminals carried by the base for terminating the transmission line, a plug receptacle carried by the base and electrically connected to the screw terminals for receiving a plug of the plug-in terminal, and a cover of the housing which fits over the base to enclose the terminals. Other known jacks for connecting plug-in telephones to telephone lines have screw terminals carried by the base and a plug receptacle carried by the cover, conductive spring contacts being provided to electrically connect the terminals to the plug receptacle when the cover is fitted to the base (see for example, U.S. Patent No.
4,050,768 issued to B.W. Gumb on the 27th September 1977).
According to the present invention there is provided a modular jack for electrically connecting a plug-in communications terminal to a communications transmission line, the jack comprising: a housing consisting of a one piece shell defining a cavity, the shell having an opening therethrough into the cavity and an inlet for permitting entry of the transmission line into the cavity; terminal means carried by the shell inside the cavity for terminating the transmission line, the terminal means being accessible through the .
32~;~
. ~
opening; and plug receiving means carried by the shell and accessible from outside the shell for receiving plug means of the plug-in terminal, and for electrical connection to the terminal means, the jack being mountable to a support structure to close the opening.
Thus, modular jacks constructed according to the present invention rely on a housing consistiny of a one piece shell to support and protect a connection between a plug-in terminal and a transmission line, whereas previously known modular jacks rely on a housing consisting of a separable base and cover to perform these functions. In view of this, modular jacks according to the present invention have fewer housing parts, and therefore may be more economical to manufacture and easier to install and remove than previously known jacks.
Modular jacks according to the invention may be mounted to a support structure by any convenient means. For example, a boss carried by the shell may be provided, the boss having a bore therethrough for passage of a screw to secure the shell to a support structure. Alternatively, a fastening device such as a spring clip may be mounted on the support structure for location across the shell to secure the shell to the support structure.
According to another aspect of the invention there is provided a method of moulding a shell for a modular jack, comprising:
mounting a plurality of insulation displacement terminal strips in recesses provided in a moulding surface of at least one mould body, with the strips having portions projecting from the moulding surface;
relatively moving the at least one mould body and at least one other mould body into positions in which moulding surfaces of the mould bodies define a mould cavity in the shape of the shell, and with the strip portions projecting into the mould cavi-ty; injecting flowable plastics material into the mould cavity to fill and surround the terminal portion, the plastics material after solidifying forming the shell with the terminal portions embedded in the shell.
An embodiment of the invention will now be described in the following with reference to the accompanying drawings, in which:
Figure 1 is an exploded perspective view of a typical prior art modular jack;
Figure 2 is a plan view of a modular jack constructed according to an embodiment of the invention;
Figure 3 is a cross-sectional view of the jack of Figure 2 taken along section line III-III in Figure 2;
Figure 4 is an end elevation view of the jack of Figure
2 taken in the direction of arrow IV in Figure 2;
Figure 5 is a view similar to Figure 2 showing the jack mounted to a wall;
Figure 6 is a cross-sectional view of mould bodies for moulding the modular jack of Figure 2, at a section corresponding to a sec-tion of the jack taken along line VI-VI in Figure 2; and Figure 7 is a cross-sectional view of mould bodies for moulding the modular jack of Figure 2, at a section corresponding to a section of the jack taken along line III-III in Figure 2.
A typical known modular jack 10 for connecting a plug-in terminal, such as a telephone, to a transmission line, such as a telephone line, is shown in Figure 1. The device 10 comprises a housing formed of two parts. One of these parts is a base 12 with ' ~2~ 3 screw terminals 14 and a plug receptacle 16 carried by the base 12.
The other housing part is a cover 18 which fits over the base 12 to enclose the terminals 14. Insulated wires 20 electrically connect the terminals 14 to corresponding electrical contacts 22 of the plug receptacle 16. The base 12 includes bosses 24 having bores 26 therethrough. ~hen the cover 18 is fitted to the base 12, an opening 28 through the cover 18 aligns with a recess 30 in the base 12, and an aperture 32 through the cover permits insertion of the plug into the plug receptacle.
In use, the base 12 is mounted to a support structure, such as a wall, by means of screws through the bores 26. A telephone line is passed through the recess 30 and individual conductors of the telephone line are terminated on respective screw terminals 14, so as to be electrically connected to corresponding contacts 22 of the plug receptacle 16 via insulated wires 20. The cover 18 is fitted to the base 12, the telephone line passing through the opening 28 in the cover 18. A plug connected to a plug-in telephone may now be inserted through the aperture 32 into the plug receptacle 16 to connect the plug-in telephone to the telephone line.
A modular jack constructed according to an e~bodiment of the invention is shown in Figures 2, 3 and 4. The jack 100 comprises a housing consisting of a one piece shell 102. The shell 102 has a planar base wall 104 and a continuous edge flange formed by side walls 106 projecting normal to the base wall 104. The base wall 104 and side walls 106 define a cavity 108 which has an opening 109 remote from the base wall 104, the opening 109 being defined between the side walls 106. An inlet to permit entry of a telephone line is ~ ~2~ 4~
provided by a slot 110 in one of the walls 106.
Terminal means in the form of terminal strips 112, each comprising three electrically connected insulation displacement terminals 113 are carried by the shell 102 on the base wall 104 inside the cavity 108. Plug receiving means in the form of a Teledapt~
receptacle 114 is carried by shell 102 inside cavity 108, the shell 102 having an aperture 115 for insertion of a plug into the receptacle 114. (Teledapt~ is a Registered Trade Mark of Northern Telecom Limited.) The Teledapt~ receptacle 114 has walls 116, 117, 118, 119 defining a channel 120. One of the walls 116 includes formations in the form of steps 122. A bridge member 124 extends across one end of the channel 120, and has formations defining grooves 126. The Teledapt~ receptacle 114 further comprises resilient electrical contacts 128 extending from a wall 118 of the channel 120 to the bridge member 124, each resilient electrical contact 128 having a free end 129 slidably received in a respective one of the grooves 126.
Each of the resilient electrical contacts 128 is electrically connected ~o a corresponding insulated wire 130 at a crimp connection housed in the wall 118 from which the resilient electrical contacts 128 extend. The insulated wires 130 may be used to electrically connect each of the contacts 128 to a corresponding one of the terminal strips 112.
Mounting means for the connection device is provided in the form of a boss 132 carried by the shell 102. The boss 132 has a bore 134 therethrough and a frustoconical surface 136 adjacent the bore 134 for engaging the head of d screw.
~ ~,~2~3 In use, a telephone line 200 (see Figure 5) is passed through the inlet 110, and individual conductors 202 of the telephone line 200 are terminated on selected terminals 113 of the terminal strips 112. The telephone line 200 may be knotted as shown in Figure 5 to provide strain relief. The device 100 is placed against a support structure, such as a wall 300, such that the cavity 108 faces toward the wall 300, the wall 300 closing the opening 109. A screw 400 is passed through the bore 134 in boss 132 and driven into the wall 300, a head 402 of the screw engaging the surface 136 of the boss 132 to mount the device 100 to the wall 300.
A Teledapt~ plug 500 connected to a plug-in telephone may then be inserted into the Teledapt~ receptacle 114 to connect the plug-in telephone to the telephone line 200. The channel 120 of the Teledapt~ receptacle 114 has a predetermined profile for reception of the Teledapt~ plug 500, and the steps 122 engage complementary step formations 502 on a resilient portion 504 of the Teledapt~ plug 500 to retain the plug 500 in the channel 120. Electrical contacts 506 of the Teledapt~ plug 500 engage corresponding resilient contacts 128 of the Teledapt~ receptacle 114. As the plug 500 is urged into the receptacle 114, the resilient contacts 128 resiliently deform, their free ends 129 sliding in the grooves 126.
The shell may be mounted to a support structure by convenient means other than the boss 132 included in the embodiment described above. For example, a fastening device such as a spring clip may be mounted on the support structure for location across the shell to secure the shell to the support structure.
The boss 132 and the walls 116, 117, 119 and bridge member 124 of the receptacle 114 are integrally moulded as part of the shell 102. Wall 118 of the receptacle is separately moulded, provided with insulated conductors 130 and resilient electrical contacts 128 and fixed to the other parts of the receptacle 114. Terminal strips 112 have portions which are embedded in formations 138 of the shell to hold the strips firmly in place. The formations 138 are projections formed integrally with the shell 102 and project into the cavity 108 from the base wall 104. Alternatively, the terminal strips are pressed into preformed grooves in the formations 138.
The shell 102 and its integrally moulded parts are conveniently made by a process now to be described with reference to Figures 6 and 7. Figures 6 and 7 show cross-sections through mould bodies for forming the shell 102. A first mould body 600 has a moulding surface 602 with recesses 604 for receiving insulation displacement terminal strips 112. The insulation displacement terminal strips 112 are inserted into the recesses 604 with strip portions 606 protruding. Additional mould bodies, such as second mould body 608 having a moulding surface 610, are closed onto the first mould body 600, the moulding surfaces 602, 610 defining a mould cavity 612 between the mould bodies, the cavity being of the shape of the shell 102. The strip portions 606 project into the cavity 612 as shown. A third mould body 614 having a moulding surface 616 is required to define the aperture 115 of the receptacle 114. Recesses 618 on the third mould body 614 define the steps 122 on the wall 116 25 of the receptacle 114, and fingers 620 on the first mould body 600 define the grooves 126 of the bridge member 124. Flowable plastics material is injected into the mould cavity 612 to fill it and surround ` the strip portions 606. The terminal strips 112 fit snugly in the recesses 604 to prevent flow of plastics material into the recesses around the insulation displacement terminals 113. The plastics material is solidified to form the shell 102, the strip portions 606 embedded in the shell 102.
Figure 5 is a view similar to Figure 2 showing the jack mounted to a wall;
Figure 6 is a cross-sectional view of mould bodies for moulding the modular jack of Figure 2, at a section corresponding to a sec-tion of the jack taken along line VI-VI in Figure 2; and Figure 7 is a cross-sectional view of mould bodies for moulding the modular jack of Figure 2, at a section corresponding to a section of the jack taken along line III-III in Figure 2.
A typical known modular jack 10 for connecting a plug-in terminal, such as a telephone, to a transmission line, such as a telephone line, is shown in Figure 1. The device 10 comprises a housing formed of two parts. One of these parts is a base 12 with ' ~2~ 3 screw terminals 14 and a plug receptacle 16 carried by the base 12.
The other housing part is a cover 18 which fits over the base 12 to enclose the terminals 14. Insulated wires 20 electrically connect the terminals 14 to corresponding electrical contacts 22 of the plug receptacle 16. The base 12 includes bosses 24 having bores 26 therethrough. ~hen the cover 18 is fitted to the base 12, an opening 28 through the cover 18 aligns with a recess 30 in the base 12, and an aperture 32 through the cover permits insertion of the plug into the plug receptacle.
In use, the base 12 is mounted to a support structure, such as a wall, by means of screws through the bores 26. A telephone line is passed through the recess 30 and individual conductors of the telephone line are terminated on respective screw terminals 14, so as to be electrically connected to corresponding contacts 22 of the plug receptacle 16 via insulated wires 20. The cover 18 is fitted to the base 12, the telephone line passing through the opening 28 in the cover 18. A plug connected to a plug-in telephone may now be inserted through the aperture 32 into the plug receptacle 16 to connect the plug-in telephone to the telephone line.
A modular jack constructed according to an e~bodiment of the invention is shown in Figures 2, 3 and 4. The jack 100 comprises a housing consisting of a one piece shell 102. The shell 102 has a planar base wall 104 and a continuous edge flange formed by side walls 106 projecting normal to the base wall 104. The base wall 104 and side walls 106 define a cavity 108 which has an opening 109 remote from the base wall 104, the opening 109 being defined between the side walls 106. An inlet to permit entry of a telephone line is ~ ~2~ 4~
provided by a slot 110 in one of the walls 106.
Terminal means in the form of terminal strips 112, each comprising three electrically connected insulation displacement terminals 113 are carried by the shell 102 on the base wall 104 inside the cavity 108. Plug receiving means in the form of a Teledapt~
receptacle 114 is carried by shell 102 inside cavity 108, the shell 102 having an aperture 115 for insertion of a plug into the receptacle 114. (Teledapt~ is a Registered Trade Mark of Northern Telecom Limited.) The Teledapt~ receptacle 114 has walls 116, 117, 118, 119 defining a channel 120. One of the walls 116 includes formations in the form of steps 122. A bridge member 124 extends across one end of the channel 120, and has formations defining grooves 126. The Teledapt~ receptacle 114 further comprises resilient electrical contacts 128 extending from a wall 118 of the channel 120 to the bridge member 124, each resilient electrical contact 128 having a free end 129 slidably received in a respective one of the grooves 126.
Each of the resilient electrical contacts 128 is electrically connected ~o a corresponding insulated wire 130 at a crimp connection housed in the wall 118 from which the resilient electrical contacts 128 extend. The insulated wires 130 may be used to electrically connect each of the contacts 128 to a corresponding one of the terminal strips 112.
Mounting means for the connection device is provided in the form of a boss 132 carried by the shell 102. The boss 132 has a bore 134 therethrough and a frustoconical surface 136 adjacent the bore 134 for engaging the head of d screw.
~ ~,~2~3 In use, a telephone line 200 (see Figure 5) is passed through the inlet 110, and individual conductors 202 of the telephone line 200 are terminated on selected terminals 113 of the terminal strips 112. The telephone line 200 may be knotted as shown in Figure 5 to provide strain relief. The device 100 is placed against a support structure, such as a wall 300, such that the cavity 108 faces toward the wall 300, the wall 300 closing the opening 109. A screw 400 is passed through the bore 134 in boss 132 and driven into the wall 300, a head 402 of the screw engaging the surface 136 of the boss 132 to mount the device 100 to the wall 300.
A Teledapt~ plug 500 connected to a plug-in telephone may then be inserted into the Teledapt~ receptacle 114 to connect the plug-in telephone to the telephone line 200. The channel 120 of the Teledapt~ receptacle 114 has a predetermined profile for reception of the Teledapt~ plug 500, and the steps 122 engage complementary step formations 502 on a resilient portion 504 of the Teledapt~ plug 500 to retain the plug 500 in the channel 120. Electrical contacts 506 of the Teledapt~ plug 500 engage corresponding resilient contacts 128 of the Teledapt~ receptacle 114. As the plug 500 is urged into the receptacle 114, the resilient contacts 128 resiliently deform, their free ends 129 sliding in the grooves 126.
The shell may be mounted to a support structure by convenient means other than the boss 132 included in the embodiment described above. For example, a fastening device such as a spring clip may be mounted on the support structure for location across the shell to secure the shell to the support structure.
The boss 132 and the walls 116, 117, 119 and bridge member 124 of the receptacle 114 are integrally moulded as part of the shell 102. Wall 118 of the receptacle is separately moulded, provided with insulated conductors 130 and resilient electrical contacts 128 and fixed to the other parts of the receptacle 114. Terminal strips 112 have portions which are embedded in formations 138 of the shell to hold the strips firmly in place. The formations 138 are projections formed integrally with the shell 102 and project into the cavity 108 from the base wall 104. Alternatively, the terminal strips are pressed into preformed grooves in the formations 138.
The shell 102 and its integrally moulded parts are conveniently made by a process now to be described with reference to Figures 6 and 7. Figures 6 and 7 show cross-sections through mould bodies for forming the shell 102. A first mould body 600 has a moulding surface 602 with recesses 604 for receiving insulation displacement terminal strips 112. The insulation displacement terminal strips 112 are inserted into the recesses 604 with strip portions 606 protruding. Additional mould bodies, such as second mould body 608 having a moulding surface 610, are closed onto the first mould body 600, the moulding surfaces 602, 610 defining a mould cavity 612 between the mould bodies, the cavity being of the shape of the shell 102. The strip portions 606 project into the cavity 612 as shown. A third mould body 614 having a moulding surface 616 is required to define the aperture 115 of the receptacle 114. Recesses 618 on the third mould body 614 define the steps 122 on the wall 116 25 of the receptacle 114, and fingers 620 on the first mould body 600 define the grooves 126 of the bridge member 124. Flowable plastics material is injected into the mould cavity 612 to fill it and surround ` the strip portions 606. The terminal strips 112 fit snugly in the recesses 604 to prevent flow of plastics material into the recesses around the insulation displacement terminals 113. The plastics material is solidified to form the shell 102, the strip portions 606 embedded in the shell 102.
Claims (8)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A modular jack for electrically connecting a plug-in communications terminal to a communications transmission line, the jack comprising:
a housing consisting of a one piece rigid shell defining a cavity, the shell having a base wall and a continuous edge flange formed by side walls projecting from the base wall, the base wall and side walls defining a cavity which has an opening remote from the base wall, and the edge flange having an inlet therethrough for permitting entry of a transmission line into the cavity when the opening is covered and an aperture therethrough for permitting entry of plug means into the cavity when the opening is covered;
terminal means carried by the shell inside the cavity for terminating the transmission line, the terminal means being accessible through the opening; and plug receiving means carried by the shell inside the cavity for receiving plug means of the plug-in terminal and for electrical connection to the terminal means, the plug receiving means being accessible from outside the shell via the aperture when the opening is covered and the jack being mountable to a support structure to cover the opening.
a housing consisting of a one piece rigid shell defining a cavity, the shell having a base wall and a continuous edge flange formed by side walls projecting from the base wall, the base wall and side walls defining a cavity which has an opening remote from the base wall, and the edge flange having an inlet therethrough for permitting entry of a transmission line into the cavity when the opening is covered and an aperture therethrough for permitting entry of plug means into the cavity when the opening is covered;
terminal means carried by the shell inside the cavity for terminating the transmission line, the terminal means being accessible through the opening; and plug receiving means carried by the shell inside the cavity for receiving plug means of the plug-in terminal and for electrical connection to the terminal means, the plug receiving means being accessible from outside the shell via the aperture when the opening is covered and the jack being mountable to a support structure to cover the opening.
2. A modular jack as defined in claim 1, wherein the terminal means comprise a plurality of terminal strips, each terminal strip comprising a plurality of electrically connected insulation displacement terminals.
3. A modular jack as defined in claim 1, wherein the plug receiving means is electrically connected to the terminal means by insulated electrical conductors, each conductor having a first end electrically connected to a contact means of the plug receiving means and a second end electrically connected to a corresponding terminal of the terminal means.
4. A modular jack as defined in claim 1, including mounting means for mounting the jack to a support structure, the mounting means comprising a boss carried by the shell, the boss having a bore for passage of a screw through the boss and into the support structure and a surface for engaging the head of the screw.
5. A modular jack as defined in claim 1, wherein:
the plug receiving means comprises walls defining a channel for reception of the plug means;
the mounting means comprises a boss carried by the shell, the boss having a bore for passage of a screw through the boss and into the support structure and a surface for engaging the head of the screw; and the shell, the boss, and the channel walls are integrally formed as a one piece plastics moulding.
the plug receiving means comprises walls defining a channel for reception of the plug means;
the mounting means comprises a boss carried by the shell, the boss having a bore for passage of a screw through the boss and into the support structure and a surface for engaging the head of the screw; and the shell, the boss, and the channel walls are integrally formed as a one piece plastics moulding.
6. A modular jack as defined in claim 5, wherein the terminal means comprise a plurality of terminal strips partly embedded in the one piece plastics moulding and extending therefrom into the cavity, each terminal strip comprising a plurality of electrically connected insulation displacement terminals.
7. A modular jack as defined in claim 5, wherein:
the terminal means comprise a plurality of terminal strips, each terminal strip comprising a plurality of electrically connected insulation displacement terminals; and the moulding includes formations defining grooves for receiving and retaining the terminal strips.
the terminal means comprise a plurality of terminal strips, each terminal strip comprising a plurality of electrically connected insulation displacement terminals; and the moulding includes formations defining grooves for receiving and retaining the terminal strips.
8. A method of moulding a shell for a modular jack, comprising:
mounting a plurality of insulation displacement terminals in recesses provided in a moulding surface of at least one mould body, with the terminals having portions projecting from the moulding surface;
relatively moving said at least one mould body and at least one other mould body into positions in which moulding surfaces of the mould bodies define a mould cavity in the shape of the shell, and with said terminal portions projecting into the mould cavity; and injecting flowable plastics material into the mould cavity to fill and surround the terminal portions, the plastics material after solidifying forming the shell with said terminal portions embedded in the shell.
mounting a plurality of insulation displacement terminals in recesses provided in a moulding surface of at least one mould body, with the terminals having portions projecting from the moulding surface;
relatively moving said at least one mould body and at least one other mould body into positions in which moulding surfaces of the mould bodies define a mould cavity in the shape of the shell, and with said terminal portions projecting into the mould cavity; and injecting flowable plastics material into the mould cavity to fill and surround the terminal portions, the plastics material after solidifying forming the shell with said terminal portions embedded in the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA516674A CA1268243C (en) | 1986-08-22 | 1986-08-22 | Modular jack for plug-in communication terminals and method of moulding same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA516674A CA1268243C (en) | 1986-08-22 | 1986-08-22 | Modular jack for plug-in communication terminals and method of moulding same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA1268243A true CA1268243A (en) | 1990-04-24 |
| CA1268243C CA1268243C (en) | 1990-04-24 |
Family
ID=4133789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA516674A Expired - Lifetime CA1268243C (en) | 1986-08-22 | 1986-08-22 | Modular jack for plug-in communication terminals and method of moulding same |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1268243C (en) |
-
1986
- 1986-08-22 CA CA516674A patent/CA1268243C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA1268243C (en) | 1990-04-24 |
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