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Publication numberUS3601755 A
Publication typeGrant
Publication dateAug 24, 1971
Filing dateDec 10, 1965
Priority dateDec 10, 1965
Publication numberUS 3601755 A, US 3601755A, US-A-3601755, US3601755 A, US3601755A
InventorsJames F Shiells Jr
Original AssigneeDigital Sensors Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electrical jumper and method of making same
US 3601755 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

United States Patent [72] inventor James F. Shiells, Jr.

La Canada, Calif.

[21 Appl. No. 512,965

(22] Filed Dec. 10, 1965 [45] Patented Aug. 24, 1971 [73] Assignee Digital Sensors, inc.

I54] ELECTRICAL JUMPER AND METHOD 0 MAKING SAME 1 Clalm, 5 Drawing Figs.

[52] [1.5. CI 339/19, 339/17 R [51] Int. Cl H0lr 31/08 [50] Field ofSearch 339/19, 17, 22; 174/1 17.1, 1 17.1 1; 338/212, 254, 255, 314; 29/625, 630; 72/199 [56] References Cited UNITED STATES PATENTS 2,258,750 10/1941 Eichwald 339/275 B X 2,558,008 6/1951 Smith 339/18CX 2,596,528 5/1952 Carlson 339/223 2,745,931 5/1956 l-leibel 338/254 X 2,910,766 11/1959 Pritikin '7 2 9/625 2,994,058 7/ l 961 Dahlgren 339/100 3,221,286 11/1965 Fedde 339/17 F 2,351,632 6/1944 OBrien 339/22 X 3,196,657 7/1965 Fromson 72/199 FOREIGN PATENTS 198,739 6/1923 Great Britain 174/1 17.6

1,175,923 11/1958 France 174/1 17.6

Primary ExaminerErnest R. Purser Assistant Examiner-Rohert A. Hafcr Attorney-Lyon & Lyon ABSTRACT: in making an electrical jumper a round wire has an intermediate portion flattened by applying a rolling pressure leaving the ends of the wire in original round condition for use as terminals. Such intermediate portion is sandwiched between two sheets of insulating material which are then laminated to cover only such flattened intermediate portion. A plurality of such wires may be so sandwiched between sheets of insulating material with the planes of such flattened portions being coplanar. 1n the flattening operation the crosssectional area of the flattened portion is preferably made less than the cross-sectional area of either end of the wire for enhanced flexibility.

ELECTRICAL JUMPER AND METHOD OF MAKING SAME The present invention relates to connectors for use in electrical circuits, commonly referred to as electrical jumpers and also to the method of making the same.

It is oftentimes desirable to interconnect printed electrical circuit boards. In accordance with certain aspects of the present invention, this is accomplished by a plurality of insulated wires each having its original round ends but with a flattened intermediate connecting portion that interconnects such round ends. Such intermediate flat portion is produced by rolling or otherwise applying pressure to such intermediate portion to deform and flatten the same. Preferably this flattening is accomplished by placing the intermediate portion of the wire between rollers so that during such flattening, the crosssectional area is reduced with the overall length being increased. The individual wires thus flattened are sandwiched between two sheets of plastic in a laminated construction with the round wire ends exposed on either side for soldering into printed circuit boards or other electronic components.

It is therefore a general object of the present invention to provide a jumper and a method for making the same.

A specific object of the present invention is to provide a jumper which is economical and simple to manufacture, the same being particularly adaptable to production by machines.

Another specific object of the present invention is to provide a jumper of this character which has round ends interconnected by an intermediate flat flexible portion.

Another specific object of the present invention is to provide a method of this character for producing a jumper having desired flexibility and yet with a large enough diameter round end for soldering satisfactorily and conveniently. v

The features of the present invention which are believed to be novel are set forth with particularity in the appended claims. This invention itself, both as to its organization and manner of operation, together with further objects and advantages thereof, may be best understood by reference to the following description taken in connection with the accompanying drawings in which:

FIG. 1 is a top plan view of a multiconductor jumper embodying features of the present invention, the same being illustrated with approximately three times enlargement and with a portion of the same broken away to more clearly show the flattened intermediate portion of some of the conductors.

FIG. 2 is a section taken generally as indicated by the line 2-2 in FIG. 1.

FIG. 3 illustrates steps in the process of making the individual conductors ultimately assembled in the assembly shown in FIG. 1.

FIGS. 4 and 5 are sectional views taken respectively on the lines 44 and 5-5 in FIG. 2, the insulation in FIG. 4 being removed for clarity.

As illustrated in FIG. 1, a typical jumper assembly includes nine individual and identical electrical conductors -18, each formed from standard round copper wire, the same, however, being formed in accordance with important features of the present invention with a corresponding intermediate flat portion 10A-18A. The flat portion of each wire is coplanar and is sandwiched between sheets and 21 of insulating plastic material. Such plastic material may be either of the thermoplastic or thermosetting kind and is suitably processed to encase the flattened portions, with, in some cases, the plastic material being bonded to the plastic sheets in a laminated construction, and in each case with the plastic sheets 20 and 21 maintaining the individual conductors in spaced relation insulated one from the other.

Various means may be used to produce the flattened intermediate portions. FOr example, the same may be flattened in a press so that the cross-sectional area of the copper is uniform throughout both the round and flattened sections. In

commercial production the flat portion may haye about onehalf the cross-sectional area of the round portion with such flattening and reduction in cross section being accomplished by applying a rolling pressure to the original round wire as indicated in FIG. 3 such that there is an elongation as well as a flattening. By thus reducing the cross section, maximum flexibility of the jumper is obtained with a large enough diameter round part for soldering satisfactorily and conveniently.

Thus, as illustrated in FIG. 3, a typical originally round wire 5 has applied thereto a rolling pressure by a pressure roller 6 which is moved in the direction indicated by the arrow 7 from its position shown in the upper portion of FIG. 3 to its position in the lower portion of FIG. 3 to produce the intermediate flattened portion 5A, such intermediate flattened portion 5A having a cross-sectional area somewhat smaller than the original cross section of the wire 5 so that as a result of this rolling operation, there is an elongation and this is also indicated in FIG. 3 in that the ends 5B and SC in the final configuration are spaced a greater distance apart.

It will be understood that it is within the purview of the invention to have the ends and the intermediate portion of either the same or different cross-sectional area but preferably, as illustrated in connection with FIG. 3, the crosssectional area of the intermediate portion is less than the cross-sectional area of the original wire, i.e., the cross-sectional area of the unaltered ends.

It will be observed in FIGS. 1 and 2 that the insulation material extends far enough up the flattened wire section to prevent the relatively stiff round wire portion from sharply bending the flattened section at the edge of the insulation.

The round portion of the wire is intended to be inserted in slightly oversized holes in a printed circuit board, and the flat portion of the wire, because of its geometry, is incapable of being inserted in the circuit board hole.

While the particular embodiments of the present invention have been shown and described, it will be obvious to those skilled in the art that changes and modifications may be made without departing from the invention in its broader aspects and, therefore, the aim in the appended claims is to cover all such changes and modifications as fall within the true spirit and scope of this invention.

lclaim 1. A flexible jumper for making electrical connections between circuit elements of, for example, a printed circuit board, said jumper having spaced ends with an integral flat portion of substantially different cross section interconnecting and spacing said ends, and insulating material covering only said flat portion, said spaced ends being terminals and extending outwardly from said insulating material, said flat portion being sufficiently prolonged and of such thinness in said flat portion to provide flexibility between said spaced ends, said flat portion having a cross-sectional area substantially less than the cross-sectional area of one of said ends, said one end being of substantially round solid wire.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2258750 *Dec 12, 1940Oct 14, 1941Benjamin EichwaldTerminal block
US2351632 *Apr 27, 1942Jun 20, 1944Pierce John B FoundationPolarized outlet section for electric wiring systems
US2558008 *Jan 14, 1947Jun 26, 1951Int Standard Electric CorpTerminal bank
US2596528 *Oct 25, 1949May 13, 1952Aircraft Marine Prod IncElectrical connector having coaxial barrels of different diameters
US2745931 *Mar 25, 1953May 15, 1956Erie Resistor CorpResistors and method of making the same
US2910766 *Feb 24, 1953Nov 3, 1959Pritikin NathanMethod of producing an electrical component
US2994058 *May 29, 1958Jul 25, 1961Sanders Associates IncPrinted circuit article
US3196657 *Jul 16, 1959Jul 27, 1965Fromson Howard AMethod of making tubing
US3221286 *Jul 31, 1961Nov 30, 1965Sperry Rand CorpConnector for printed circuit strip transmission line
FR1175923A * Title not available
GB198739A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3997229 *Sep 15, 1975Dec 14, 1976Thomas & Betts CorporationFlexible connecting means
US4064622 *Apr 30, 1976Dec 27, 1977Teledyne Electro MechanismsMethod of making a flexible jumper strip
US4085502 *Apr 12, 1977Apr 25, 1978Advanced Circuit Technology, Inc.Jumper cable
US4187606 *May 8, 1978Feb 12, 1980Aries Electronics, Inc.Flexible electrical jumper and method of making same
US4357750 *Apr 12, 1977Nov 9, 1982Advanced Circuit Technology Inc.Jumper cable
US4556266 *Feb 9, 1984Dec 3, 1985Thomas & Betts CorporationJumper wire material
US4718863 *May 2, 1986Jan 12, 1988Thomas & Betts CorporationJumper cable having clips for solder connections
US5030137 *Jan 30, 1990Jul 9, 1991Amphenol Interconnect Products CorporationFlat cable jumper
US5041015 *Mar 30, 1990Aug 20, 1991Cal Flex, Inc.Electrical jumper assembly
US5049089 *Aug 17, 1990Sep 17, 1991Eastman Kodak CompanyLow cost arch connector
US5306874 *Jul 12, 1991Apr 26, 1994W.I.T. Inc.Electrical interconnect and method of its manufacture
US5387111 *Oct 4, 1993Feb 7, 1995Motorola, Inc.Electrical connector
US5509204 *Oct 25, 1993Apr 23, 1996Sadigh-Behzadi; Amir-AkbarMethod of forming a flat flexible jumper
US6469261 *Jul 25, 2001Oct 22, 2002Yazaki CorporationWiring unit
US6811409Feb 13, 2003Nov 2, 2004Robert Bosch GmbhConnecting device for flexible electrical connection of circuit boards
US6835081Nov 25, 2002Dec 28, 2004Pent Technologies, Inc.Snap fit modular electrical distribution block
US6991485Nov 19, 2004Jan 31, 2006Pent TechnologiesSnap fit modular electrical distribution block
US20040137766 *Feb 13, 2003Jul 15, 2004Juergen KurleConnecting device for flexible electrical connection of circuit boards
US20050095890 *Nov 19, 2004May 5, 2005Pent Technologies, Inc.Snap fit modular electrical distribution block
DE2727641A1 *Jun 20, 1977Dec 29, 1977Advanced Circuit TechVerbindungskabel sowie verfahren zu seiner herstellung
DE3113879A1 *Apr 6, 1981Dec 10, 1981Thomas & Betts CorpElektrische verbindungsvorrichtung
DE4013620C1 *Apr 27, 1990Jul 18, 1991Eberhard 8766 Grossheubach De KoepfFlexible flat cable connector - has U=shaped connecting pins which can be bent into hollow cylindrical shape
DE20300294U1 *Jan 9, 2003May 19, 2004Robert Bosch GmbhVerbindungsmittel zur flexiblen elektrischen Verbindung von Leiterplatten
DE102007057444A1Nov 29, 2007Jun 4, 2009Robert Bosch GmbhVerbindungsmittel zur flexiblen elektrischen Verbindung von Leiterplatten
WO1993024939A1 *May 27, 1993Dec 9, 1993Advanced Circuit TechLaminated conductive material, multiple conductor cables and methods of manufacturing such cables
Classifications
U.S. Classification439/492, 439/502
International ClassificationH05K1/00, H05K3/40
Cooperative ClassificationH05K3/4092, H05K1/0393
European ClassificationH05K3/40T
Legal Events
DateCodeEventDescription
Sep 20, 1982ASAssignment
Owner name: ALLIED CORPORATION; COLUMBIA RD. AND PARK AVE., MO
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ELTRA CORPORATION;REEL/FRAME:004026/0293
Effective date: 19820531
Owner name: ALLIED CORPORATION, NEW JERSEY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ELTRA CORPORATION;REEL/FRAME:004026/0293
Jan 26, 1982ASAssignment
Owner name: ELTRA CORPORATION, A CORP. OF NY
Free format text: CERTIFIED COPY OF MERGER FILED IN THE OFFICE OF SECRETARY OF STATE OF DELAWARE ON JUNE 6, 1980, SHOWING MERGER AND CHANGE OF NAME OF ASSIGNOR;ASSIGNOR:ATREL CORPORATION (INTO);REEL/FRAME:003992/0237
Effective date: 19811020
Owner name: ELTRA CORPORATION, OHIO
Free format text: CERTIFIED COPY OF MERGER FILED IN THE OFFICE OF SECRETARY OF STATE OF DELAWARE ON JUNE 6, 1980, SHOWING MERGER AND CHANGE OF NAME OF ASSIGNOR;ASSIGNOR:ATREL CORPORATION;REEL/FRAME:003992/0237