EP0477006A1 - Hochohmiges elektrisches Kabel und Verfahren zur Herstellung - Google Patents

Hochohmiges elektrisches Kabel und Verfahren zur Herstellung Download PDF

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Publication number
EP0477006A1
EP0477006A1 EP91308533A EP91308533A EP0477006A1 EP 0477006 A1 EP0477006 A1 EP 0477006A1 EP 91308533 A EP91308533 A EP 91308533A EP 91308533 A EP91308533 A EP 91308533A EP 0477006 A1 EP0477006 A1 EP 0477006A1
Authority
EP
European Patent Office
Prior art keywords
conductors
conductor
surface portion
cable assembly
electrical
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.)
Granted
Application number
EP91308533A
Other languages
English (en)
French (fr)
Other versions
EP0477006B1 (de
Inventor
Richard F. Strauss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Installation Products Inc
Original Assignee
Thomas and Betts Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US07/585,860 external-priority patent/US5091610A/en
Priority claimed from US07/585,858 external-priority patent/US5049215A/en
Application filed by Thomas and Betts Corp filed Critical Thomas and Betts Corp
Publication of EP0477006A1 publication Critical patent/EP0477006A1/de
Application granted granted Critical
Publication of EP0477006B1 publication Critical patent/EP0477006B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables
    • H01B7/0823—Parallel wires, incorporated in a flat insulating profile
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/0006—Apparatus or processes specially adapted for manufacturing conductors or cables for reducing the size of conductors or cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/0009—Details relating to the conductive cores

Definitions

  • This invention relates generally to high impeded electrical cable and also relates to a method of forming a high impedance cable having conductors being spaced at a given pitch.
  • Cable of this type typically includes a plurality of electrical conductors arranged in side-by-side spaced orientation. These conductors are surrounded by an insulative casing which electrically isolates each of the conductors.
  • each conductor measured by the cross-sectional area, dictates the amount of signal current that each conductor can carry.
  • the amount of signal current carried is directly proportional to the size of the conductor.
  • the impedance value of the cable is related, in part, to the spacing between adjacent conductors.
  • the greater the space between adjacent conductors i.e. the more insulating mass therebetween the greater the impedance value of the cable.
  • the present invention provides a method of forming an electrical cable assembly including providing a plurality of elongate electrical conductors having a substantially circular cross-sectional shape. One of the conductors is flattened along its length. The conductors are arranged so that the flattened portion of the one conductor is facing an adjacent conductor. An insulative casing is formed around the connectors to place the connectors in electrical isolation.
  • the present invention also provides an electrical cable assembly including a plurality of elongate electrical conductors and an insulative casing surrounding each of the conductors.
  • the conductors are arranged in side-by-side transversely spaced orientation.
  • the casing includes a major planar surface.
  • One of the conductors includes a flat surface portion which faces an adjacent one of the plural conductors.
  • the one conductor further includes a curved surface portion which faces the major planar surface to provide mass termination capabilities.
  • Figure 1 shows an extend of a conventional round conductor of the type used in accordance with the present invention.
  • Figure 2 shows schematically, the cross-sectional shape of the conductor of Figure 1.
  • Figure 3 shows, partially in section and partially schematically, a portion of a conventional flat multiconductor cable including round conductors of the type shown in Figure 1.
  • FIG. 4 shows schematically, an electrical conductor formed in accordance with the present invention.
  • Figure 5 shows, partially in section and partially schematically, a portion of an electrical cable of the present invention employing the conductor shown in Figure 4.
  • Conductor 10 is a solid round copper wire of conventional construction used to transmit electrical signals therealong.
  • Conductor 10 has a major longitudianl axis c and a circular cross-sectional shape as shown in Figure 2.
  • Typical wire sizes used in accordance with the present invention include American Wire Gage (AWG) sizes 26 through 30. Round conductors of these sizes have diameters d of between .010 inches and .016 inches. The cross-sectional areas of these conductors range between approximately 100 and 250 circular mils. Electrical resistance of a copper wire is inversely proportional to its cross-sectional area. Therefore, larger wires will have less resistance and can accordingly carry a greater amount of electrical signal therealong.
  • AMG American Wire Gage
  • Cable assembly 12 includes an electrically insulative casing 14 formed of extruded plastic such as polyvinyl chloride (PVC).
  • Casing 14 is generally flat having an upper planar surface 16 and a lower planar surface 18 substantially parallel thereto. While planar surfaces 16 and 18 are shown as flat, cable having undulating planar surfaces may also be employed. Cables of this type are commonly referred to as ribbon cables.
  • Conductors 10 are supported within casing 14 in electrical isolation. Conductors 10 are spaced from one another within casing 14 at a given pitch. Conductor pitch is defined by the distance between center line c of adjacent conductors 10. The pitch between conductors of flat ribbon cable is critical as ribbon cable is designed to be mass terminated to electrical connectors (not shown) having insulation displacing contacts fixedly supported in an insulative housing. the pitch of the cable must match the pitch of the connector. In Figure 3, the conductors are spaced at a pitch of P1. Since conductors 10 are of the round variety, the actual space between facing surfaces of adjacent conductors will be less than P1.
  • the distance between tangent points T1 and T2 of side-by-side conductors 10′ and 10 ⁇ is S1, which is substantially less than P1.
  • the impedance value of an electrical cable is determined, in part, by the special separation between facing surfaces of adjacent conductors. As a mass of insulating material increases between adjacent conductors, the impedance value of the cable will correspondingly increase. Thus, as conductor size is increased and/or the pitch between conductors is decreased, the impedance value of the cable will drop.
  • the present invention provides a technique for placing conductors at a closer pitch without either decreasing conductor size or decreasing the impedance value of the cable.
  • Conductor 20 is formed from a conventional solid round conductor such as conductor 10 shown in Figure 1.
  • the round conductor 20 is passed through flattening rollers (not shown) to form flat surfaces 21 along the length thereof.
  • the rollers are of the type conventionally used in the metallic forming art to press flat surfaces on metallic objects. Rollers capable of such function are commercially available.
  • Flat surfaces 21 may be placed on conductor 20 either simultaneously or by separate forming steps. As shown in Figure 4, flat surfaces 21 are diametrically opposed and substantially parallel to one another.
  • An important feature of the present invention is that rather than cutting a flat surface on each diametrical side of conductor 20, the conductor is actually flattened in a manner such that opposed upper and lower rounded conductor surfaces 23 and 25 are outwardly deformed from their original condition. Thus, the cross-sectional area of conductor 20 does not change during formation. This permits the conductor to carry the same amount of signal current as was possible prior to the forming steps employed in the present invention.
  • upper and lower surfaces 23, 25 also substantially maintain their rounded configuration. This facilitates the ability to mass terminate cable assembly 22 (Fig. 5) with conventional electrical connectors having insulation displacing contacts (not shown).
  • Cable assembly 22 includes insulative casing 24 similar to casing 14 shown in Figure 3.
  • Casing 24 includes upper and lower major planar surfaces 26 and 28 respectively which support therebetween conductors 20.
  • Cable assembly 22 includes conductors 20 of the type shown in Figure 4.
  • Conductors 20 are arranged within casing 24 so that flattened surfaces 21 are substantially perpendicular to major planar surfaces 26 and 28 and center lines c line in a common plane.
  • Rounded surfaces 23 and 25 face major surfaces 26 and 28 respectively.
  • Cable assembly 22 is typically formed by extruding insulative casing 24 over conductors 20.
  • the conductors 20 of cable assembly 22 are spaced at a pitch P1 which is less than P2 the pitch of cable assembly 12 (Fig. 3). Since each of conductors 20 includes flattened surfaces 21, the distance S2 between facing flattened surfaces 21 of adjacent conductors 20′ and 20 ⁇ is not correspondingly reduced. Comparing cable assembly 12 shown in Figure 3, with cable assembly 22 of the present invention shown in Figure 5, this feature is illustrated. While the conductor pitch of the cable assembly 22 of the present invention has been reduced from P1 to P2, the actual spacing between facing surfaces of adjacent conductors remains substantially the same. That is, S1 ⁇ S2.
  • the impedance value of cable assembly 22 would be substantially similar to impedance value of cable assembly 12. Also, as mentioned above, since conductors 20 maintain the same cross-sectional area as conductors 10, the signal carrying capability of cable assembly 22 is not reduced.
  • the present invention employs multiple conductors, each identically formed to have diametrically opposed flattened surfaces 21.
  • conductors 20 may be formed to have only one flattened surface.
  • only selected ones of conductors 20 may be formed to have one or more flattened surfaces. This would permit the cable assembly 22 to have selected different impedance values as between various pairs of conductors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)
EP19910308533 1990-09-19 1991-09-18 Hochohmiges elektrisches Kabel und Verfahren zur Herstellung Expired - Lifetime EP0477006B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US07/585,860 US5091610A (en) 1990-09-19 1990-09-19 High impedance electrical cable
US585860 1990-09-19
US585858 1990-09-19
US07/585,858 US5049215A (en) 1990-09-19 1990-09-19 Method of forming a high impedance electrical cable

Publications (2)

Publication Number Publication Date
EP0477006A1 true EP0477006A1 (de) 1992-03-25
EP0477006B1 EP0477006B1 (de) 1996-03-06

Family

ID=27079542

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910308533 Expired - Lifetime EP0477006B1 (de) 1990-09-19 1991-09-18 Hochohmiges elektrisches Kabel und Verfahren zur Herstellung

Country Status (4)

Country Link
EP (1) EP0477006B1 (de)
CA (1) CA2051505C (de)
DE (1) DE69117631T2 (de)
ES (1) ES2086494T3 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012030365A1 (en) * 2010-08-31 2012-03-08 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods
US8466365B2 (en) 2010-08-31 2013-06-18 3M Innovative Properties Company Shielded electrical cable
US8492655B2 (en) 2010-08-31 2013-07-23 3M Innovative Properties Company Shielded electrical ribbon cable with dielectric spacing
US8575491B2 (en) 2010-08-31 2013-11-05 3M Innovative Properties Company Electrical cable with shielding film with gradual reduced transition area
US8658899B2 (en) 2009-06-19 2014-02-25 3M Innovative Properties Company Shielded electrical cable
US8859901B2 (en) 2010-09-23 2014-10-14 3M Innovative Properties Company Shielded electrical cable
US9119292B2 (en) 2010-08-31 2015-08-25 3M Innovative Properties Company Shielded electrical cable in twinaxial configuration
US9685259B2 (en) 2009-06-19 2017-06-20 3M Innovative Properties Company Shielded electrical cable
US10147522B2 (en) 2010-08-31 2018-12-04 3M Innovative Properties Company Electrical characteristics of shielded electrical cables

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB336784A (en) * 1928-10-20 1930-10-23 Siemens Ag Trunk cable with compensating condensers
FR1404549A (fr) * 1964-05-20 1965-07-02 Trefimetaux Trese métallique, sa fabrication et produits équipés de cette tresse
US3558803A (en) * 1969-08-26 1971-01-26 Revere Copper & Brass Inc Magnet strip conductor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB336784A (en) * 1928-10-20 1930-10-23 Siemens Ag Trunk cable with compensating condensers
FR1404549A (fr) * 1964-05-20 1965-07-02 Trefimetaux Trese métallique, sa fabrication et produits équipés de cette tresse
US3558803A (en) * 1969-08-26 1971-01-26 Revere Copper & Brass Inc Magnet strip conductor

Cited By (67)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9324477B2 (en) 2009-06-19 2016-04-26 3M Innovative Properties Company Shielded electrical cable
US10448547B2 (en) 2009-06-19 2019-10-15 3M Innovative Properties Company Shielded electrical cable
US10306819B2 (en) 2009-06-19 2019-05-28 3M Innovative Properties Company Shielded electrical cable
US10080319B2 (en) 2009-06-19 2018-09-18 3M Innovative Properties Company Shielded electrical cable
US8658899B2 (en) 2009-06-19 2014-02-25 3M Innovative Properties Company Shielded electrical cable
US9883620B2 (en) 2009-06-19 2018-01-30 3M Innovative Properties Company Shielded electrical cable
US9763369B2 (en) 2009-06-19 2017-09-12 3M Innovative Properties Company Shielded electrical cable
US9715951B2 (en) 2009-06-19 2017-07-25 3M Innovative Properties Company Shielded electrical cable
US9686893B2 (en) 2009-06-19 2017-06-20 3M Innovative Properties Company Shielded electrical cable
US9685259B2 (en) 2009-06-19 2017-06-20 3M Innovative Properties Company Shielded electrical cable
US8946558B2 (en) 2009-06-19 2015-02-03 3M Innovative Properties Company Shielded electrical cable
US9035186B2 (en) 2009-06-19 2015-05-19 3M Innovative Properties Company Shielded electrical cable
US9704619B1 (en) 2010-08-31 2017-07-11 3M Innovative Properties Company Electrical characteristics of shielded electrical cables
US10056170B2 (en) 2010-08-31 2018-08-21 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods
US9196397B2 (en) 2010-08-31 2015-11-24 3M Innovative Properties Company Shielded electrical cable
US9208927B2 (en) 2010-08-31 2015-12-08 3M Innovative Properties Company Shielded electrical cable
US9119292B2 (en) 2010-08-31 2015-08-25 3M Innovative Properties Company Shielded electrical cable in twinaxial configuration
EP3046115A1 (de) * 2010-08-31 2016-07-20 3M Innovative Properties Company Hochdichtes abgeschirmtes elektrokabel und andere abgeschirmte kabel, systeme und verfahren
US9443644B2 (en) 2010-08-31 2016-09-13 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods
US9449738B2 (en) 2010-08-31 2016-09-20 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods
US9502154B1 (en) 2010-08-31 2016-11-22 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods
US9595371B2 (en) 2010-08-31 2017-03-14 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods
US9601236B2 (en) 2010-08-31 2017-03-21 3M Innovative Properties Company Shielded electrical cable
US9607735B2 (en) 2010-08-31 2017-03-28 3M Innovative Properties Company Shielded electrical ribbon cable with dielectric spacing
US9607734B2 (en) 2010-08-31 2017-03-28 3M Innovative Properties Company Shielded electrical ribbon cable with dielectric spacing
US9627106B2 (en) 2010-08-31 2017-04-18 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods
US9646740B2 (en) 2010-08-31 2017-05-09 3M Innovative Properties Company Electrical characteristics of shielded electrical cables
US9653195B2 (en) 2010-08-31 2017-05-16 3M Innovative Properties Company Shielded electrical cable
US9666332B1 (en) 2010-08-31 2017-05-30 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods
US8933333B2 (en) 2010-08-31 2015-01-13 3M Innovative Properties Company Shielded electrical cable
US11923112B2 (en) 2010-08-31 2024-03-05 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods
WO2012030365A1 (en) * 2010-08-31 2012-03-08 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods
US9715952B2 (en) 2010-08-31 2017-07-25 3M Innovative Properties Company Electrical characteristics of shielded electrical cables
US8841554B2 (en) 2010-08-31 2014-09-23 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods
US8841555B2 (en) 2010-08-31 2014-09-23 3M Innovative Properties Company Connector arrangements for shielded electrical cables
US9786411B2 (en) 2010-08-31 2017-10-10 3M Innovative Properties Company Electrical characteristics of shielded electrical cables
US9865378B2 (en) 2010-08-31 2018-01-09 3M Innovative Properties Company Shielded electrical cable
EP2685468A3 (de) * 2010-08-31 2014-06-25 3M Innovative Properties Company Hochdichtes abgeschirmtes Elektrokabel und andere abgeschirmte Kabel, Systeme und Verfahren
US9892823B2 (en) 2010-08-31 2018-02-13 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods
US11699536B2 (en) 2010-08-31 2023-07-11 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods
US8575491B2 (en) 2010-08-31 2013-11-05 3M Innovative Properties Company Electrical cable with shielding film with gradual reduced transition area
US10090082B2 (en) 2010-08-31 2018-10-02 3M Innovative Properties Company Shielded electrical cable
US10109396B2 (en) 2010-08-31 2018-10-23 3M Innovative Properties Company Electrical characteristics of shielded electrical cables
US10109397B2 (en) 2010-08-31 2018-10-23 3M Innovative Properties Company Electrical characteristics of shielded electrical cables
US10134506B2 (en) 2010-08-31 2018-11-20 3M Innovative Properties Company Electrical characteristics of shielded electrical cables
US10147522B2 (en) 2010-08-31 2018-12-04 3M Innovative Properties Company Electrical characteristics of shielded electrical cables
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US10340059B2 (en) 2010-08-31 2019-07-02 3M Innovative Properties Company Shielded electrical cable
US10347393B2 (en) 2010-08-31 2019-07-09 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods
US10347398B2 (en) 2010-08-31 2019-07-09 3M Innovative Properties Company Electrical characteristics of shielded electrical cables
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US8466365B2 (en) 2010-08-31 2013-06-18 3M Innovative Properties Company Shielded electrical cable
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US10573427B2 (en) 2010-08-31 2020-02-25 3M Innovative Properties Company Shielded electrical ribbon cable with dielectric spacing
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US11664137B2 (en) 2010-08-31 2023-05-30 3M Innovative Properties Company High density shielded electrical cable and other shielded cables, systems, and methods
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US9129724B2 (en) 2010-09-23 2015-09-08 3M Innovative Properties Company Shielded electrical cable
US8859901B2 (en) 2010-09-23 2014-10-14 3M Innovative Properties Company Shielded electrical cable

Also Published As

Publication number Publication date
CA2051505C (en) 1995-07-04
EP0477006B1 (de) 1996-03-06
ES2086494T3 (es) 1996-07-01
CA2051505A1 (en) 1992-03-20
DE69117631D1 (de) 1996-04-11
DE69117631T2 (de) 1996-07-18

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