US3836943A - Electrical connector for coaxial cable - Google Patents
Electrical connector for coaxial cable Download PDFInfo
- Publication number
- US3836943A US3836943A US00364725A US36472573A US3836943A US 3836943 A US3836943 A US 3836943A US 00364725 A US00364725 A US 00364725A US 36472573 A US36472573 A US 36472573A US 3836943 A US3836943 A US 3836943A
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- US
- United States
- Prior art keywords
- connector
- coaxial cable
- contact means
- cable
- longitudinal bore
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
- H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
- H01R9/0506—Connection between three or more cable ends
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
- H01R4/36—Conductive members located under tip of screw
- H01R4/363—Conductive members located under tip of screw with intermediate part between tip and conductive member
- H01R4/366—Conductive members located under tip of screw with intermediate part between tip and conductive member intermediate part attached to the tip of the screw
Definitions
- ABSTRACT An electrical connector for a coaxial cable.
- the connector body contains a longitudinal bore which receives one end of the coaxial cable. Teeth which face inwardly towards the bore are slidably movable in the connector body at right angles to the longitudinal bore and are driven into the cable to make contact with the outer conductor of the cable by the rotation of a screw which is operatively connected to the teeth.
- the present invention is an electrical connector and, more particularly, an improved electrical connector for a coaxial cable.
- many types of connectors exist for connecting such coaxial cables to an instrument chassis, another line or a similar cable they have a number of disadvantages.
- Some connectors now in use employ a large number of parts and are of relatively complex construction and are hence, expensive to manufacture.
- the strength of grip afforded by some of the connectors now in use has also been found to be insufficient to prevent separation by relatively small axial forces.
- An object of this invention is to provide a simple electrical connector having an improved mechanical and electrical connection to coaxial cables which provides a strong grip on the cable and a positive electrical connection thereto, yet which requires only minimal cable preparation.
- a connector body having a longitudinal bore therein to accommodate the end ofa coaxial cable, a set of slidably movable. contact means facing inwardly towards the bore and which are adapted to pass through the outer dielectric of the cable and to make contact with the outer conductor of the cable, and drive means which move the contact means inwardly into the longitudinal bore and into contact with the outer conductor of the coaxial cable.
- FIG. I is a perspective view of a device containing three connectors each made according to the invention.
- FIG. 2 is a bottom plan view of the device shown in FIG. 1 taken along line 2-2 in FIG. 1 in the direction of the arrows;
- FIG. 3 is a top view, partially broken away, of the device shown in FIG. 1 taken along line 3-3 in FIG. 1 in the direction of the arrows;
- FIG. 4 is a sectional view of the device shown in FIG. 1 taken along line 44 in FIG. 1 in the direction of the arrows;
- FIG. 5 is a sectional view, partially broken away. of the device shown in FIG. 1 taken along line 55 in FIG. I in the direction of the arrows;
- FIG. 6 is an enlarged sectional view of the inwardly facing teeth and screw means utilized in the connector.
- FIG. 1 is a perspective view of a device utilizing three connectors, each made according to the present invention. It will be readily apparent to a person in the art that other devices utilizing a differing number of incoming or outgoing coaxial cables may use the connector described and claimed herein.
- Each connector comprises a connector body, indicated by reference numeral 11, having a longitudinal bore 12 formed therein to accomodate one end of a coaxial cable 13, which is shown in phantom.
- the coaxial cable as best shown in FIG. 6, includes an inner conductor 14, an inner dielectric l5 surrounding the inner conductor, an outer conductor 16 surrounding the inner dielectric l5, and an outer dielectric 17 surrounding the outer conductor 16.
- the inner conductor 14 of the cable is connected to appropriate conventional electronic circuitry 18 inside the device shown in perspective in FIG. I by means of appropriate contacts 14. Insulation 20 prevents a shorting or grounding of the inner conductor 14.
- the connector of the present invention includes simple means to achieve a good ground connection for the coaxial cable 13 as will now be described.
- the connector of the present invention includes contact means 21 which face inwardly towards the bore 12 and which in the preferred embodiment are two separate spaced-apart sets of teeth 21a and 21b, as best shown in FIGS. 5 and 6.
- the contact means 21 give a good ground connection with the outer conductor 16 of the coaxial cable 13.
- the contact means 21 are slidably mounted in a bore 22 which can be generally at right angles to the longitudinal bore 12 holding the coaxial cable.
- Drive means 23 which in the preferred embodiment is a screw, are provided to allow for the movement of the contact means towards the bore 12.
- the contact means 21 are supported by a common flange 30 which is bent at right angles to the contact means and are slidably mounted in a slot 26 which goes completely around shank 24a of screw 23 to allow for the rotation of the contact means 21 in bore 22. If desired the two sets of contact means 21a and 21b can be integral with one another and flange 30. The points of the contact means 21 are preferably arranged in a plane which is substantially parallel to the longitudinal bore 12.
- the connector of the present invention is quite simply utilized.
- the first step is the insertion of the suitably prepared coaxial cable 13 into the longitudinal bore 12 and the connection of its inner conductor 14 with the appropriate electronic circuitry 18. when this has been accomplished the screw head 24 is rotated, thereby driving the screw shank 24a downwardly.
- the contact means 21, situated adjacent to the lowermost end of the shank 24a slidably move in the slot 26 in shank 2441 as the screw is turned but retain the orientation shown in cross-sectional views in FIGS. 5 and 6 due to the narrow width of bore 22 which prevents their turning. They are driven downward by the action of the screw ing operation until the points of the contact means 21 are driven through the outer dielectric 17 and into secure engagement with the outer conductor 16 of the cable 13.
- the screw 23 can be dimensioned. if desired, so that the engagement of the contact means and outer conductor occurs just before the undersurface of screw head 24 makes contact with ledge 25.
- the contact means 21 make contact with the conductor 16 a good ground connection is established because of the secure placement of the two sets of contact means on opposite sides of conductor 16.
- the contact means need not comprise a series of discrete teeth. A single blade could serve as the contact. All such modifications are intended to be included within the scope of the invention and the foregoing is merely intended to be illustrative of a preferred embodiment.
- the appended claims define the scope of protection sought.
- An electrical connector for a coaxial cable which contains an inner conductor. a dielectric surrounding said inner conductor, an outer conductor surrounding LII said dielectric, and an outer dielectric surrounding said outer conductor, said connector comprising:
- a connector body having a longitudinal bore formed therein for receiving one end of said coaxial cable
- the contact means which face inwardly towards the bore.
- the contact means being slidably movable in the connector body and adapted to be moved inwardly into the longitudinal bore to pass through the outer dielectric of the cable to make contact with the outer conductor of the cable;
- a connector as claimed in claim 1 comprising two parallel. spaced-apart sets of inwardly facing teeth.
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- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
An electrical connector for a coaxial cable. The connector body contains a longitudinal bore which receives one end of the coaxial cable. Teeth which face inwardly towards the bore are slidably movable in the connector body at right angles to the longitudinal bore and are driven into the cable to make contact with the outer conductor of the cable by the rotation of a screw which is operatively connected to the teeth.
Description
United States Patent [191 Horak [451 Sept. 17, 1974 ELECTRICAL CONNECTOR FOR COAXlAL CABLE [75] Inventor: Martin S. Horak, Morganville, NJ.
[73] Assignee: Gamco Industries, Inc., Roselle, NJ.
[22] Filed: May 29, 1973 [21] Appl. No.: 364,725
[52] US. Cl 339/97 P, 339/177 R [51] Int. Cl H0lr 9/08 [58] Field of Search 339/95, 97-99,
[56] References Cited UNITED STATES PATENTS 2,706,282 4/1955 Dudra 339/97 P Nepovim 339/177 R Prodel 339/98 Primary Examiner-Joseph H. McGlynn Attorney, Agent, or FirmBrumbaugh, Graves, Donohue & Raymond [5 7] ABSTRACT An electrical connector for a coaxial cable. The connector body contains a longitudinal bore which receives one end of the coaxial cable. Teeth which face inwardly towards the bore are slidably movable in the connector body at right angles to the longitudinal bore and are driven into the cable to make contact with the outer conductor of the cable by the rotation of a screw which is operatively connected to the teeth.
6 Claims, 6 Drawing Figures ELECTRICAL CONNECTOR FOR COAXIAL CABLE BACKGROUND OF THE INVENTION The present invention is an electrical connector and, more particularly, an improved electrical connector for a coaxial cable.
A need exists for a simple and efficient coupling device for coaxial cables which have an inner centrallylocated conductor surrounded by a thickness of dielectric material, which in turn is surrounded by an outer conductor that can be of the braided or foil type, and an outer covering of dielectric material. Although many types of connectors exist for connecting such coaxial cables to an instrument chassis, another line or a similar cable, they have a number of disadvantages. Some connectors now in use employ a large number of parts and are of relatively complex construction and are hence, expensive to manufacture. The strength of grip afforded by some of the connectors now in use has also been found to be insufficient to prevent separation by relatively small axial forces. Sometimes when the cable is under tension, the connection with the outer conductor of the cable tends to tear the outer conductor, thereby producing a weak mechanical grip and a poor electrical contact. Another significant disadvantage with some connectors now in use is the need for preliminary preparation of the coaxial cable before the cable may be inserted within the connector body. Such preparation commonly means exposing the center conductor of the coaxial cable for a short distance. Many connectors now in use also require that the outer jacket or insulation be removed to a certain degree to expose the outer conductor before a good electrical contact can be achieved.
SUMMARY OF THE INVENTION An object of this invention is to provide a simple electrical connector having an improved mechanical and electrical connection to coaxial cables which provides a strong grip on the cable and a positive electrical connection thereto, yet which requires only minimal cable preparation.
The foregoing and other objects are attained in accordance with the invention by the provision ofa connector body having a longitudinal bore therein to accommodate the end ofa coaxial cable, a set of slidably movable. contact means facing inwardly towards the bore and which are adapted to pass through the outer dielectric of the cable and to make contact with the outer conductor of the cable, and drive means which move the contact means inwardly into the longitudinal bore and into contact with the outer conductor of the coaxial cable.
BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be further understood upon a consideration of the following detailed description ofthe presently preferred embodiment when taken in conjunction with the accompanying drawings, wherein:
FIG. I is a perspective view of a device containing three connectors each made according to the invention;
FIG. 2 is a bottom plan view of the device shown in FIG. 1 taken along line 2-2 in FIG. 1 in the direction of the arrows;
FIG. 3 is a top view, partially broken away, of the device shown in FIG. 1 taken along line 3-3 in FIG. 1 in the direction of the arrows;
FIG. 4 is a sectional view of the device shown in FIG. 1 taken along line 44 in FIG. 1 in the direction of the arrows;
FIG. 5 is a sectional view, partially broken away. of the device shown in FIG. 1 taken along line 55 in FIG. I in the direction of the arrows; and
FIG. 6 is an enlarged sectional view of the inwardly facing teeth and screw means utilized in the connector.
DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 is a perspective view ofa device utilizing three connectors, each made according to the present invention. It will be readily apparent to a person in the art that other devices utilizing a differing number of incoming or outgoing coaxial cables may use the connector described and claimed herein.
Each connector comprises a connector body, indicated by reference numeral 11, having a longitudinal bore 12 formed therein to accomodate one end of a coaxial cable 13, which is shown in phantom. The coaxial cable, as best shown in FIG. 6, includes an inner conductor 14, an inner dielectric l5 surrounding the inner conductor, an outer conductor 16 surrounding the inner dielectric l5, and an outer dielectric 17 surrounding the outer conductor 16. The inner conductor 14 of the cable is connected to appropriate conventional electronic circuitry 18 inside the device shown in perspective in FIG. I by means of appropriate contacts 14. Insulation 20 prevents a shorting or grounding of the inner conductor 14. The connector of the present invention includes simple means to achieve a good ground connection for the coaxial cable 13 as will now be described.
The connector of the present invention includes contact means 21 which face inwardly towards the bore 12 and which in the preferred embodiment are two separate spaced-apart sets of teeth 21a and 21b, as best shown in FIGS. 5 and 6. The contact means 21 give a good ground connection with the outer conductor 16 of the coaxial cable 13. The contact means 21 are slidably mounted in a bore 22 which can be generally at right angles to the longitudinal bore 12 holding the coaxial cable. Drive means 23, which in the preferred embodiment is a screw, are provided to allow for the movement of the contact means towards the bore 12. The contact means 21 are supported by a common flange 30 which is bent at right angles to the contact means and are slidably mounted in a slot 26 which goes completely around shank 24a of screw 23 to allow for the rotation of the contact means 21 in bore 22. If desired the two sets of contact means 21a and 21b can be integral with one another and flange 30. The points of the contact means 21 are preferably arranged in a plane which is substantially parallel to the longitudinal bore 12.
The connector of the present invention is quite simply utilized. The first step is the insertion of the suitably prepared coaxial cable 13 into the longitudinal bore 12 and the connection of its inner conductor 14 with the appropriate electronic circuitry 18. when this has been accomplished the screw head 24 is rotated, thereby driving the screw shank 24a downwardly. The contact means 21, situated adjacent to the lowermost end of the shank 24a, slidably move in the slot 26 in shank 2441 as the screw is turned but retain the orientation shown in cross-sectional views in FIGS. 5 and 6 due to the narrow width of bore 22 which prevents their turning. They are driven downward by the action of the screw ing operation until the points of the contact means 21 are driven through the outer dielectric 17 and into secure engagement with the outer conductor 16 of the cable 13. The screw 23 can be dimensioned. if desired, so that the engagement of the contact means and outer conductor occurs just before the undersurface of screw head 24 makes contact with ledge 25. When the contact means 21 make contact with the conductor 16 a good ground connection is established because of the secure placement of the two sets of contact means on opposite sides of conductor 16.
Upon reading the foregoing, a person in the art will become aware of modifications which can be made to the above-described preferred embodiment without departing from the spirit and scope of the invention. For example, the contact means need not comprise a series of discrete teeth. A single blade could serve as the contact. All such modifications are intended to be included within the scope of the invention and the foregoing is merely intended to be illustrative of a preferred embodiment. The appended claims define the scope of protection sought.
I claim:
1. An electrical connector for a coaxial cable which contains an inner conductor. a dielectric surrounding said inner conductor, an outer conductor surrounding LII said dielectric, and an outer dielectric surrounding said outer conductor, said connector comprising:
a connector body having a longitudinal bore formed therein for receiving one end of said coaxial cable;
contact means which face inwardly towards the bore. the contact means being slidably movable in the connector body and adapted to be moved inwardly into the longitudinal bore to pass through the outer dielectric of the cable to make contact with the outer conductor of the cable; and
drive means upon a portion of which the contact means are rotatably mounted, whereby the contact means will be moved in a direction towards the longitudinal bore and into contact with the outer conductor of the coaxial cable.
2. A connector as claimed in claim 1 wherein the contact means comprise teeth.
3. A connector as claimed in claim 1 wherein the drive means comprise a rotatable screw.
4. A connector as claimed in claim 1 wherein the contact means are slidably mounted in the connector body in a bore which is generally at right angles to the longitudinal bore for receiving the coaxial cable.
5. A connector as claimed in claim 1 wherein the contact means have points at their end which are formed in a row which is substantially parallel to the longitudinal bore.
6. A connector as claimed in claim 1 comprising two parallel. spaced-apart sets of inwardly facing teeth.
Claims (6)
1. An electrical connector for a coaxial cable which contains an inner conductor, a dielectric surrounding said inner conductor, an outer conductor surrounding said dielectric, and an outer dielectric surrounding said outer conductor, said connector comprising: a connector body having a longitudinal bore formed therein for receiving one end of said coaxial cable; contact means which face inwardly towards the bore, the contact means being slidably movable in the connector body and adapted to be moved inwardly into the longitudinal bore to pass through the outer dielectric of the cable to make contact with the outer conductor of the cable; and drive means upon a portion of which the contact means are rotatably mounted, whereby the contact means will be moved in a direction towards the longitudinal bore and into contact with the outer conductor of the coaxial cable.
2. A connector as claimed in claim 1 wherein the contact means comprise teeth.
3. A connector as claimed in claim 1 wherein the drive means comprise a rotatable screw.
4. A connector as claimed in claim 1 wherein the contact means are slidably mounted in the connector body in a bore which is generally at right angles to the longitudinal bore for receiving the coaxial cable.
5. A connector as claimed in claim 1 wherein the contact means have points at their end which are formed in a row which is substantially parallel to the longitudinal bore.
6. A connector as claimed in claim 1 comprising two parallel, spaced-apart sets of inwardly facing teeth.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00364725A US3836943A (en) | 1973-05-29 | 1973-05-29 | Electrical connector for coaxial cable |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00364725A US3836943A (en) | 1973-05-29 | 1973-05-29 | Electrical connector for coaxial cable |
Publications (1)
Publication Number | Publication Date |
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US3836943A true US3836943A (en) | 1974-09-17 |
Family
ID=23435794
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US00364725A Expired - Lifetime US3836943A (en) | 1973-05-29 | 1973-05-29 | Electrical connector for coaxial cable |
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US (1) | US3836943A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3989333A (en) * | 1975-12-18 | 1976-11-02 | Arvin Industries, Inc. | Cable television tap connector box |
US4040701A (en) * | 1976-07-30 | 1977-08-09 | Bell Telephone Laboratories, Incorporated | Quick connector for service wires |
DE3418582A1 (en) * | 1983-05-18 | 1984-12-13 | Ark-Les Corp., Watertown, Mass. | CONNECTING OR BRANCHING DEVICE FOR SHIELDED MESSAGE LINES |
US4552428A (en) * | 1982-06-02 | 1985-11-12 | Liu Ling H | Electrical plug |
US4597623A (en) * | 1982-06-29 | 1986-07-01 | At&T Bell Laboratories | Connector assembly |
US4972505A (en) * | 1988-12-06 | 1990-11-20 | Isberg Reuben A | Tunnel distributed cable antenna system with signal top coupling approximately same radiated energy |
US5928007A (en) * | 1996-05-17 | 1999-07-27 | Teracom Components Ab | Device for grounding feed cables between transmitters or receivers and antennas |
US20080153328A1 (en) * | 2006-12-21 | 2008-06-26 | Kesse Ho | Grounding blocks and methods for using them |
US20080261447A1 (en) * | 2007-04-23 | 2008-10-23 | D Addario James | Plug connector |
AU2007201069B2 (en) * | 2006-03-15 | 2010-02-25 | Cable Accessories (Australia) Pty. Ltd. | Cable connection device |
US20110306236A1 (en) * | 2010-06-09 | 2011-12-15 | D Addario James | "F" type electronic connector |
US20120071041A1 (en) * | 2009-03-16 | 2012-03-22 | Soprano Industry | Housing, electrical coupling including said housing, and vehicle including such a coupling |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2706282A (en) * | 1954-03-22 | 1955-04-12 | Dudra Daniel | Tap for coaxial cable transmission lines |
US3668612A (en) * | 1970-08-07 | 1972-06-06 | Lindsay Specialty Prod Ltd | Cable connector |
US3688247A (en) * | 1969-09-04 | 1972-08-29 | Sicame Sa | Cable connectors |
-
1973
- 1973-05-29 US US00364725A patent/US3836943A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2706282A (en) * | 1954-03-22 | 1955-04-12 | Dudra Daniel | Tap for coaxial cable transmission lines |
US3688247A (en) * | 1969-09-04 | 1972-08-29 | Sicame Sa | Cable connectors |
US3668612A (en) * | 1970-08-07 | 1972-06-06 | Lindsay Specialty Prod Ltd | Cable connector |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3989333A (en) * | 1975-12-18 | 1976-11-02 | Arvin Industries, Inc. | Cable television tap connector box |
US4040701A (en) * | 1976-07-30 | 1977-08-09 | Bell Telephone Laboratories, Incorporated | Quick connector for service wires |
US4552428A (en) * | 1982-06-02 | 1985-11-12 | Liu Ling H | Electrical plug |
US4597623A (en) * | 1982-06-29 | 1986-07-01 | At&T Bell Laboratories | Connector assembly |
DE3418582A1 (en) * | 1983-05-18 | 1984-12-13 | Ark-Les Corp., Watertown, Mass. | CONNECTING OR BRANCHING DEVICE FOR SHIELDED MESSAGE LINES |
US4533197A (en) * | 1983-05-18 | 1985-08-06 | Prince Thomas F | Junction block for shielded communications network line |
US4972505A (en) * | 1988-12-06 | 1990-11-20 | Isberg Reuben A | Tunnel distributed cable antenna system with signal top coupling approximately same radiated energy |
US5928007A (en) * | 1996-05-17 | 1999-07-27 | Teracom Components Ab | Device for grounding feed cables between transmitters or receivers and antennas |
AU2009202376B2 (en) * | 2006-03-15 | 2011-12-01 | Cable Accessories (Australia) Pty. Ltd. | Cable connection device |
AU2007201069B2 (en) * | 2006-03-15 | 2010-02-25 | Cable Accessories (Australia) Pty. Ltd. | Cable connection device |
US7540758B2 (en) * | 2006-12-21 | 2009-06-02 | Kesse Ho | Grounding blocks and methods for using them |
US20080153328A1 (en) * | 2006-12-21 | 2008-06-26 | Kesse Ho | Grounding blocks and methods for using them |
US20080261447A1 (en) * | 2007-04-23 | 2008-10-23 | D Addario James | Plug connector |
WO2008133673A2 (en) * | 2007-04-23 | 2008-11-06 | D'addario & Company, Inc. | Plug connector |
US7476119B2 (en) * | 2007-04-23 | 2009-01-13 | D'addario & Company, Inc. | Plug connector |
WO2008133673A3 (en) * | 2007-04-23 | 2009-02-05 | Addario & Company Inc D | Plug connector |
TWI420764B (en) * | 2007-04-23 | 2013-12-21 | Addario & Company Inc D | Plug connector |
US20120071041A1 (en) * | 2009-03-16 | 2012-03-22 | Soprano Industry | Housing, electrical coupling including said housing, and vehicle including such a coupling |
US8398412B2 (en) * | 2009-03-16 | 2013-03-19 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Housing, electrical coupling including said housing, and vehicle including such a coupling |
US20110306236A1 (en) * | 2010-06-09 | 2011-12-15 | D Addario James | "F" type electronic connector |
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