US2109334A - Communication cable comprising one or more screened core groups - Google Patents

Communication cable comprising one or more screened core groups Download PDF

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Publication number
US2109334A
US2109334A US31780A US3178035A US2109334A US 2109334 A US2109334 A US 2109334A US 31780 A US31780 A US 31780A US 3178035 A US3178035 A US 3178035A US 2109334 A US2109334 A US 2109334A
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United States
Prior art keywords
tapes
screen
group
core
cable
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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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US31780A
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English (en)
Inventor
Kaden Heinrich
Thomas Paul
Wassmansdorff Hans
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Siemens and Halske AG
Siemens AG
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Siemens AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/08—Screens specially adapted for reducing cross-talk
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens

Definitions

  • Our invention relates to improvements in communication cables comprising one or more screened core groups.
  • the arrangement of conductive screens in communication cables is an eflective means of reducing the crosstalk interferences between the dlfierent lines and the interferences arising from external sources of disturbance.
  • the screening sleeves must be as highly conductive as possible and, if possible, form a closed tube, that ,is, a tube having a continuous unbroken wall. Since, however, a closed tube is, on the one hand, comparatively expensive to produce and, on the other hand, is not very flexible, the screens in communication cables are usually made in the form of tape'windings, the tapes consisting for example of tinfoil, metallized paper or of magnetizable material.
  • Such screens in general, are sufllclent for low-frequency transmission.
  • a sufliciently great screening efiect it has been proposed to arrange a number of screens consisting of tape windings, one on the other.
  • Such multiple screens are, however, comparatively expensive and materially increase the diameter of the cable.
  • the present invention provides'a novel construction of the screens and is based on the fact hitherto unknown that the paths oi ;the eddy currents produced by the communication currents,
  • the core group there are arranged around the core group to be screened, for example, a pair or quad, a number of good conducting tapes or wires, generically termed in some of the annexed claims as strand elements, which are laid and twisted in the same direction as that in which the cores of the core group a stranded.
  • t "e stranding lay or length of the pitch of the screening strand elements is made to agree with the length of twist or pitch of the core group.
  • the screen is, as far as possible, made as a closed stranded layer.
  • a simple form 01 construction consists of a number of thin tapes stranded so as mutually to overlap one another at the side edges. Furthermore, two layers of tapes may be stranded one over the other in such manner that the tapes of the outer layer If, however, in accordance with the cover the gaps between or the abutting edges of the tapes of the inner layer.
  • the screens made in accordance with the invention are suitable for use with particular advantage for high frequency cables, for example, for multiple carrier frequency cables, and for television cables which contain only a single core group, in order to avoid the eddy currents otherwise arising in the lead jacket when high frequency currents are used.
  • the screen tapes or wires are stranded with the same length of lay or twist pitch and the same direction of twist as the cores of the core group to be screened, the danger exists of these ing material or a supplementary supporting memher, for example, an open wire winding is arranged underneath the screen.
  • tapes and the like has again the disadvantage that the tapes have too great an electric resistance, so that they do not sufiice for screening strong fields, especially magnetic fields and, furthermore, cannot provide any mechanical protection to the cores.
  • Figures 1 to 11 of the accompanying drawing show one -form of cable respectively in cross section and Figures 5 and 6 show respectively cross sections of two further forms of cable;
  • FIGS 7 to 11 show respectively in diagrammatic form and-in cross-section different constructions of screening sleeves built up in accordance with the invention.
  • Figures 1 and 2 show a high frequency cable which comprisesa twisted double line the two conductors of which are indicated at I0 and l I.
  • the conductors are formed as thin hollow conductors which are each supported upon an internal core l2 of insulating material.
  • each conductor is surrounded with a helically wound cord l3 and a sleeve M of insulating material is then applied in the form of a tape winding.
  • the two cores so built up are twisted together in common with filler elements l5 of insulating material.
  • a sleeve I6 of insulating material Over the double line is first arranged a sleeve I6 of insulating material and over this is arranged a screen I! formed in accordance with the invention.
  • the screen I! consists of a closed layer formed ofthin copper tapes laid with a long length of twist and with overlapping of their edges.
  • a sleeve of insulating material I8 is applied in the form of a tape winding and then a lead jacket H9.
  • the high-frequency cable shown in Figures 3 and 4 differs from the embodiment shown in Figures 1 and 2 essentially only in that no such additional fillers as the fillers [5 in Figures 1 and 2 are provided for supporting the conductive screen but instead a metal wire wound round the conductor pair in open helical turns is arranged under the conductive screen.
  • indicate the two tubular conductors which are each supported on a core 22 consisting of insulating material.
  • a cord 23 of insulating material is wound in open helical windings around each conductor and is surrounded with a closed sleeve 24 of insulating material in the form of a tape winding.
  • the two cores twisted together are then surrounded by a wire '25 wound in spaced helical turns and then provided with a screen 26 built up of tapes of good conducting material in the same way as the screen I! in Figures 1 and 2.
  • a. sleeve 21 of insulating material is arranged in the form of a. tape winding, and then a lead jacket 28.
  • FIG. 5 shows a communication cable comprising four' conductor pairs 30, 3
  • Each conductor pair consists of the two tubular conductors 34 and 35 which are each surrounded by a cord 36 of insulating material and then by a sleeve 31 also of insulating material.
  • the two cores so formed are twisted together in combination with filler elements 38 of insulating material and are surrounded with a conductive screen 39 and a sleeve 40 of insulating material.
  • the conductive screen is built up of a number of good conducting tapes twisted with a long lay or pitch and overlapping one another at their edges. Over the four twisted pairs a sleeve ll of insulating material is applied and then a lead jacket.
  • the communication cable shown in Figure 6 differs from that shown in Figure 5 essentially only in that the cable is built up of spiral quads instead of pairs and the individual conductors are solid instead of tubular.
  • the cable comprises four spiral quads 50, 5
  • the individual conductors in each quad are surrounded with a helically wound cord 54 and then surrounded with a sleeve 55 of insulating material.
  • a screen 56 is provided plied around the screen.
  • a lead jacket 58 is provided for the cable.
  • FIG. 7 consists of two layers of stranded tapes of which the tapes 60 of the outer layer cover the joints between the tapes 6
  • the screen shown in Figure 8 consists of an alternating arrangement of single metal tapes 62 and /64-.
  • the screen shown in Figure 9 is built up en-.
  • Figures 10 and 11 show two forms of screening sleeves in which between the adjacent wide screening tapes thicker, narrower lengths of material are inserted to prevent the tapes from becoming displaced one over the other.
  • comparatively thin but wide tapes 10 are laid on the cable core to form a screen, the core being of any desired form. Between adjacent tapes I0 and alternating therewith thicker, narrower lengths of material are inserted, these lengths consisting of round wires of greater thickness than the tapes.
  • the different thicknesses as of the wires and tapes lay or pitch than that of the tapes Hi and the wires ll. Practical experience has shown that great security against displacement of the thin tapes 10 over one another is afforded by this arrangement and the amount of material used for the screen, in comparison to the amount contained in profiled wires, is very small.
  • the tapes Ill may be relatively wider than those shown in the drawing.
  • a long distance communication cable for low and high frequencies, having at least one group of cores twisted together about a common axis, a screen surrounding said group, said screen consisting of a plurality of good conducting strand elementslaid side by side helically around said group and following individually the direction of the cores in said group.
  • a long distance communication cable for low and high frequencies, having at least one group of cores twisted together about a common axis, a screen surrounding said group, said screen consisting of -a plurality of good conducting strand elements laid side by side helically around said group, and having the same twist direction and the same pitch as the core twist.
  • a screen surrounding said group, said screen consisting of a plurality of good conducting tapes, laid edge to edge helically around said group and having the same twist direction and the same pitch as the core twist, said tapes being laid in two superposed layers, the tapes in one layer bridging the joints between the tapes in the other layer.
  • a screen surrounding said group said screen consisting of a plurality of good conducting tapes, laid edge to edge helically around said group and having the. same twist direction and the same pitch as the core twist, at least every other tape of said screen consisting of double tape layers, the adjacent edge of an'adjacent tape engaging between the two layers of the double tape.
  • a screen surrounding said group, said screen consisting of a plurality of good conducting tapes, laid edge to edge helically around said group and having the same twist direction and the same pitch as the core twist, each tape consisting of two superposed layers, one edge of each tape having both of its layers interposed between the two layers of the adjacent tape edge.
  • a long distance communication cable for low and high frequencies, having at least one group of cores twisted together about a common axis, a screen surrounding said group, said screen consisting of a plurality of good conducting strand elements laid side by side helically around said group, and having the same twist direction and the same pitch as the core twist, said strand;
  • a long distance communication cable for low and high frequencies, having at least one group of cores twisted together about a common axis, a screen surrounding said group, said screen consisting of a plurality of good conducting strand elements laid side by side helically around said group, and having the same twist direction and the same pitch as the core twist; and a supporting helical open wire winding of much smaller pitch than thatof the core twist, wound around saidv twisted cores for supporting the screen strand portions circumferentially suspended between the cores.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Communication Cables (AREA)
US31780A 1934-07-17 1935-07-17 Communication cable comprising one or more screened core groups Expired - Lifetime US2109334A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE449582X 1934-07-17

Publications (1)

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US2109334A true US2109334A (en) 1938-02-22

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US (1) US2109334A (sv)
GB (1) GB449582A (sv)
NL (1) NL48345C (sv)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3023267A (en) * 1959-03-05 1962-02-27 Gen Cable Corp Combination power and communication cable
US3433890A (en) * 1966-02-10 1969-03-18 Communications Patents Ltd Signal transmission cable
US4599483A (en) * 1983-10-14 1986-07-08 Audioplan Renate Kuhn Signal cable
US4866842A (en) * 1988-09-30 1989-09-19 Amp Incorporated Method of making a shielded cable harness
US5286923A (en) * 1990-11-14 1994-02-15 Filotex Electric cable having high propagation velocity
US5800493A (en) * 1995-04-26 1998-09-01 Gynecare, Inc. Intrauterine ablation system
US20070102187A1 (en) * 2005-09-22 2007-05-10 Hew-Kable/Cdt Gmbh & Co. Kg Flexible electrical cable
WO2009143145A1 (en) * 2008-05-19 2009-11-26 Panduit Corp. Communication cable with improved crosstalk attenuation
US20100224389A1 (en) * 2009-03-03 2010-09-09 Panduit Corp. Method and Apparatus For Manufacturing Mosaic Tape For Use In Communication Cable
WO2012110072A1 (de) * 2011-02-14 2012-08-23 Rosenberger Hochfrequenztechnik Gmbh & Co. Kg Kabel mit verseilten leiterpaaren
US20150293314A1 (en) * 2014-04-09 2015-10-15 Molex Incorporated Cable Structure With Improved Clamping Configuration
US9960557B2 (en) * 2015-09-14 2018-05-01 Hitachi Metals, Ltd. Composite cable and composite harness
US10224683B2 (en) * 2015-09-14 2019-03-05 Hitachi Metals, Ltd. Composite cable and composite harness
US11152136B2 (en) * 2018-03-26 2021-10-19 Sumitomo Wiring Systems, Ltd. Composite cable

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3622683A (en) * 1968-11-22 1971-11-23 Superior Continental Corp Telephone cable with improved crosstalk properties

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3023267A (en) * 1959-03-05 1962-02-27 Gen Cable Corp Combination power and communication cable
US3433890A (en) * 1966-02-10 1969-03-18 Communications Patents Ltd Signal transmission cable
US4599483A (en) * 1983-10-14 1986-07-08 Audioplan Renate Kuhn Signal cable
US4866842A (en) * 1988-09-30 1989-09-19 Amp Incorporated Method of making a shielded cable harness
US5286923A (en) * 1990-11-14 1994-02-15 Filotex Electric cable having high propagation velocity
US5800493A (en) * 1995-04-26 1998-09-01 Gynecare, Inc. Intrauterine ablation system
US20070102187A1 (en) * 2005-09-22 2007-05-10 Hew-Kable/Cdt Gmbh & Co. Kg Flexible electrical cable
US20080087453A1 (en) * 2005-09-22 2008-04-17 Hew-Kabel/Cdt Gmbh & Co. Kg Flexible electrical cable
US7566832B2 (en) 2005-09-22 2009-07-28 Hew-Kabel/Cdt Gmbh & Co. Kg Flexible electrical cable
WO2009143145A1 (en) * 2008-05-19 2009-11-26 Panduit Corp. Communication cable with improved crosstalk attenuation
US8927866B2 (en) 2008-05-19 2015-01-06 Panduit Corp. Communication cable with improved crosstalk attenuation
JP2011521432A (ja) * 2008-05-19 2011-07-21 パンドウィット・コーポレーション 改善したクロストーク減衰の通信ケーブル
AU2009249175A8 (en) * 2008-05-19 2014-08-07 General Cable Technologies Corp. Communication cable with improved crosstalk attenuation
CN102067244B (zh) * 2008-05-19 2012-11-21 泛达公司 改善串扰衰减的通信电缆
AU2009249175B2 (en) * 2008-05-19 2014-07-10 General Cable Technologies Corp. Communication cable with improved crosstalk attenuation
US8558115B2 (en) 2009-03-03 2013-10-15 Panduit Corp. Communication cable including a mosaic tape
US10650941B2 (en) 2009-03-03 2020-05-12 Panduit Corp. Communication cable including a mosaic tape
US20100224389A1 (en) * 2009-03-03 2010-09-09 Panduit Corp. Method and Apparatus For Manufacturing Mosaic Tape For Use In Communication Cable
US11756707B2 (en) 2009-03-03 2023-09-12 Panduit Corp. Communication cable including a mosaic tape
US9269479B2 (en) 2009-03-03 2016-02-23 Panduit Corp. Methods of manufacturing a communication cable
US11476016B2 (en) 2009-03-03 2022-10-18 Panduit Corp. Communication cable including a mosaic tape
WO2012110072A1 (de) * 2011-02-14 2012-08-23 Rosenberger Hochfrequenztechnik Gmbh & Co. Kg Kabel mit verseilten leiterpaaren
US20150293314A1 (en) * 2014-04-09 2015-10-15 Molex Incorporated Cable Structure With Improved Clamping Configuration
US20180226762A1 (en) * 2015-09-14 2018-08-09 Hitachi Metals, Ltd. Composite cable and composite harness
US10128626B2 (en) * 2015-09-14 2018-11-13 Hitachi Metals, Ltd. Composite cable and composite harness
US10224683B2 (en) * 2015-09-14 2019-03-05 Hitachi Metals, Ltd. Composite cable and composite harness
US10547150B2 (en) * 2015-09-14 2020-01-28 Hitachi Metals, Ltd. Composite cable and composite harness
US9960557B2 (en) * 2015-09-14 2018-05-01 Hitachi Metals, Ltd. Composite cable and composite harness
US11152136B2 (en) * 2018-03-26 2021-10-19 Sumitomo Wiring Systems, Ltd. Composite cable

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Publication number Publication date
GB449582A (en) 1936-06-30
NL48345C (sv)

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