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Publication numberUS3322885 A
Publication typeGrant
Publication dateMay 30, 1967
Filing dateJan 27, 1965
Priority dateJan 27, 1965
Publication numberUS 3322885 A, US 3322885A, US-A-3322885, US3322885 A, US3322885A
InventorsMay James J, Winkowski Edward A
Original AssigneeGen Electric
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electrical connection
US 3322885 A
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Description  (OCR text may contain errors)

May 30, 1967 J. .1. MAY E'fA 8 ELECTRICAL-CONNECTION Filed Jan. 27, 1965 v H S v m w 2 I MAMHW u 0 .l S F W 4 Mo C C I T w o w N 3 C C C U m N 2 L I.

I ATTORNEY United States Patent 3,322,885 ELECTRICAL CONNECTION James J. May and Edward A. Winkowski, Burlington,

Vt., assignors to General Electric Company, a corporation of New York Filed Jan. 27, 1965, Ser. No. 428,579 Claims. (Cl. 174-78) This invention relates generally to an electrical connection between conductors and more particularly to an improved electrical connection between the shields of shielded wires and the method of making it.

When a plurality of electrical connections to a piece of apparatus must be made, it is common practice to bind the separate wires into a single cable and use special connectors having multiple connector pins. When the wires are the shielded type, it is also desirable to connect the shields to each other and to a grounding point. This connection is commonly made by using a ribbon of conductive material and soldering it to each of the shields. This method is time consuming, bulky, and occasionally results in inadequate connections.

It is, therefore, an object of this invention to provide an easily fabricated andreliable connection for the shields of shieldedwires. g

In a preferred form of the invention, the insulation covering the shields of the wires is stripped at the point Where the connection is to be made. A potting mold or boot is positioned about the wires at this point, and a curable plastic material containing conductive particles is placed in the boot on the shields of the wires. The plastic material is cured, and the connection is complete. The

conductive particles electrically connect the shields together.

The invention will be better understood from the following description referring to the drawing in which:

FIGURE 1 is a schematic, partially in cross-section, of one embodiment of the invention in which a plurality of wires have their shields connected; and

FIGURE 2 is a schematic, partially in cross-section, of another embodiment of the invention.

In FIGURE 1, two shielded wires and 12 are shown connected to connector 14. Each wire has an outer layer of insulation 16 covering a conductive shield 18. The shield is separated from the wire conductor 20 by a second layer of insulation 22. Connector 14 is provided with a plurality of pins or sockets, not shown, which are mated with those on a similar connector. Each pin or socket of connector 14 has an inner solder cup 24 to which the wire conductor 20 is soldered. To insulate these soldered joints, a layer of dielectric pot-ting compound 26 is poured into the potting mold and boot 28. A suitable room temperature curing potting compound is Shells Epon 828. This layer terminates below the exposed conductive shield 18 of wires 10 and 12.

In accordance with the invention, it is desired that an electrical connection be established between the conductive shields 18 of the respective wires. A layer of conductive plastic 30 is, therefore, poured into boot 28 and cured. Conductive plastic is used here to described a dielectric plastic which acquires conductive characteristics by mixing into it conductive particles. A suitable conductive plastic is Epoxy Conductive Cement sold by Hysol Corp. of Olean, N.Y., under the designation K8-4238.

This plastic is also a room temperature curing type.

Depending upon the needs of the situation, boot 28 can be conductive or insulating. If boot 28 is insulating, it would most likely be preferable to add a layer of dielectric compound above the layer of conductive plastic 30.

If it is desired that the connection between shields be carried through the connector, a length of uninsulated wire conductor 32 is soldered to an unused solder cup 34. Wire 32 is given a length suflicient to extend into the conductive plastic layer 30.

Obviously connections similar to those made to connector 14 may be made to the connector with which connector 14 will mate.

More generally, the invention may be considered as shown by FIGURE 2. A plurality of shielded wires 40, 42 and 44 have had the insulation covering their shields removed at a point where it is desired to electrically connect the shields. In addition, in this example, it is desired to connect the shields to a ground. Consequently, an ordinary insulated wire 46 is included in the bundle of wires. The exposed shields 48, 50 and 52 of wires 40, 42 and 44, respectively, as well as a portion 54 of wire 46 from which the insulation has been removed, are aligned in a potting boot 56. Boot 56 is then filled with conductive plastic which is cured. The shields of wires 40, 42 and 44 are thereby electrically connected to each other as well as to wire 46. Wire 46 can. be connected to a ground at a convenient location.

While particular embodiments of electrical connections according to the invention have been illustrated and described, it will be obvious that changes and modifications can be made without departing from the spirit of the invention and the scope of the appended claims.

What is claimed as new and desired to be secured by Letters Patent of the United States is:

1. An electrical connection for a plurality of shielded Wires comprising:

a mass of conductive plastic in contact with the shields of said wires; and

an uninsulated portion of a ground wire in contact with said mass of conductive plastic.

2. An electrical connection for a plurality of shielded wires comprising:

a potting mold surrounding said wires at a point where the insulation has been removed from the shields, said mold being filled with a mass of conductive plastic in contact with said' shields; and

an uninsulated portion of a ground wire in contact with i said mass of conductive plastic.

3. In combination with a connector for a plurality of wires an electrical connection for shielded wires comprising:

a first layer of plastic insulating material covering the uninsulated connections of the wire conductors to the solder cups of said connector,

said first layer extending over the insulation of the.

shielded wire conductor, and a second layer of a conductive plastic in contact with v the shields of said Wires. 4. The combination of claim 3 further comprising: a length of uninsulated wire soldered to a solder cup 3 of said connector and extending into said second layer.

5. In combination with a connector for a plurality of wires an electrical connection for shielded wires comprising: I

a potting mold surrounding said wires at the connector,

a first layer of plastic insulating material in said potting mold covering the uninsulated connections of the Wire conductors to the solder cups of said connector, and

a second layer of a conductive plastic in said potting mold in contact with the shields of said wires.

Green: Printed Circuit Packaging, published in IBM Technical Disclosure Bulletin, vol. 3, No. 12, May 1966, p. 5.

10 LEWIS H. MYERS, Primary Examiner.

D. L. CLAY, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US457761 *Jan 16, 1890Aug 11, 1891F Onedillon
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3375483 *Aug 3, 1966Mar 26, 1968Gray & HuleguardElectrical connector
US3432798 *Aug 10, 1967Mar 11, 1969Sealectro CorpRight angle connectors
US3435439 *Jun 10, 1966Mar 25, 1969Toko IncWoven type,magnetic memory device employing shielding terminal plates
US3535676 *Feb 12, 1968Oct 20, 1970Hughes Aircraft CoElectrical connector
US3539973 *Feb 12, 1968Nov 10, 1970Hughes Aircraft CoElectrical connector
US3685006 *Jun 24, 1970Aug 15, 1972Beckman Instruments IncCable connector
US3744128 *Feb 12, 1971Jul 10, 1973NasaProcess for making r. f. shielded cable connector assemblies and the products formed thereby
US3792191 *Dec 26, 1972Feb 12, 1974Ite Imperial CorpEnclosure for conductor of electrical transmission system
US3830954 *Jun 26, 1973Aug 20, 1974Singer CoApparatus for shielding against electromagnetic interference
US3947959 *Dec 3, 1973Apr 6, 1976Essex International, Inc.Method of making an electrical connector
US3955874 *Oct 29, 1974May 11, 1976General Electric CompanyShielded power cable separable connector module having a conductively coated insulating rod follower
US4090767 *Oct 6, 1976May 23, 1978William Leonard TregoningCable termination assembly with cast conductive shield and method of making same
US4195272 *Feb 6, 1978Mar 25, 1980Bunker Ramo CorporationFilter connector having contact strain relief means and an improved ground plate structure and method of fabricating same
US4276523 *Aug 17, 1979Jun 30, 1981Bunker Ramo CorporationHigh density filter connector
US4489997 *Mar 15, 1982Dec 25, 1984Stow & Davis Furniture CompanyElectrical connector
US4498546 *Feb 28, 1983Feb 12, 1985Sperry CorporationApparatus for limiting electromagnetic interference radiation
US4614398 *Dec 21, 1984Sep 30, 1986Simmonds PrecisionFor eliminating EMI leakage
US4656313 *Jan 23, 1986Apr 7, 1987General Signal CorporationEMI/EMP electrical cable penetration seal
US5014813 *Dec 27, 1988May 14, 1991Fussell Don LWater-proof geophone housing
US5051543 *Sep 22, 1989Sep 24, 1991E. I. Du Pont De Nemours And CompanySlotted grounding ferrule
US5281762 *Jun 19, 1992Jan 25, 1994The Whitaker CorporationMulti-conductor cable grounding connection and method therefor
US5824954 *Jun 16, 1997Oct 20, 1998Raychem CorporationSealed interconnection device
US7371117Sep 30, 2004May 13, 2008Amphenol CorporationHigh speed, high density electrical connector
US7771233Apr 17, 2008Aug 10, 2010Amphenol CorporationHigh speed, high density electrical connector
US7868251 *Apr 8, 2008Jan 11, 2011Delphi Technologies, Inc.Shielded electric cable assembly
US8371875Jul 2, 2010Feb 12, 2013Amphenol CorporationHigh speed, high density electrical connector
US8491313Feb 2, 2012Jul 23, 2013Amphenol CorporationMezzanine connector
US8636543Feb 2, 2012Jan 28, 2014Amphenol CorporationMezzanine connector
US8657627Feb 2, 2012Feb 25, 2014Amphenol CorporationMezzanine connector
US8771016Feb 24, 2011Jul 8, 2014Amphenol CorporationHigh bandwidth connector
US8801464Jun 18, 2013Aug 12, 2014Amphenol CorporationMezzanine connector
US20120211259 *Sep 1, 2011Aug 23, 2012Fujikura Ltd.Cable assembly
WO2003056665A1 *Dec 20, 2002Jul 10, 2003Jeff G FyfeCable connector
WO2006039277A1 *Sep 28, 2005Apr 13, 2006Teradyne IncHigh speed, high density electrical connector
Classifications
U.S. Classification174/78, 439/96, 439/607.1, 29/874, 333/12, 174/76, 333/243, 174/88.00C
International ClassificationH01R4/58, H01R13/658
Cooperative ClassificationH01R13/658, H01R4/58
European ClassificationH01R4/58, H01R13/658