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US3622683A - Telephone cable with improved crosstalk properties - Google Patents

Telephone cable with improved crosstalk properties Download PDF

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Publication number
US3622683A
US3622683A US778073A US3622683DA US3622683A US 3622683 A US3622683 A US 3622683A US 778073 A US778073 A US 778073A US 3622683D A US3622683D A US 3622683DA US 3622683 A US3622683 A US 3622683A
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United States
Prior art keywords
shield
cable
plastic
electrical conductors
metal foil
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Expired - Lifetime
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US778073A
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English (en)
Inventor
Walter L Roberts
Frederic N Wilkenloh
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SUPERIOR TELETEC TRANSMISSION PRODUSTS Inc A Corp OF
Superior Essex Inc
Superior Continental Corp
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Superior Continental Corp
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Assigned to SUPERIOR CABLE CORPORATION, (CHANGED TO), SIECOR CORPORTION reassignment SUPERIOR CABLE CORPORATION, (CHANGED TO) MERGER (SEE DOCUMENT FOR DETAILS). Assignors: SIECOR OPTICALS INC. (MERGED INTO)
Assigned to WESTINGHOUSE CREDIT CORPORATION, A CORP. OF PA. reassignment WESTINGHOUSE CREDIT CORPORATION, A CORP. OF PA. ASSIGNMENT OF ASSIGNORS INTEREST. SUBJECT TO AGREEMENT RECITED. Assignors: SUPERIOR CABLE CORPORATION, A CORP. OF CA.
Assigned to SUPERIOR CABLE CORPORATION reassignment SUPERIOR CABLE CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SIECOR CORPORATION, A CORP OF DE.
Assigned to SUPERIOR CABLE CORPORATION, A CORP. OF GA. reassignment SUPERIOR CABLE CORPORATION, A CORP. OF GA. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SIECOR CORPORATION
Anticipated expiration legal-status Critical
Assigned to SUPERIOR TELETEC TRANSMISSION PRODUSTS INC., A CORPORATION OF GA reassignment SUPERIOR TELETEC TRANSMISSION PRODUSTS INC., A CORPORATION OF GA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WESTINGHOUSE CREDIT CORPORATION, A CORPORATION OF DE
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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
    • H01B11/085—Screens specially adapted for reducing cross-talk composed of longitudinal tape conductors
    • 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
    • H01B11/04—Cables with twisted pairs or quads with pairs or quads mutually positioned to reduce cross-talk

Definitions

  • Mol'fitt ABSTRACT Disclosed herein is an economical telephone cable structure and method of making same. such cable structure possessing improved crosstalk properties.
  • a plurality of insulated electrical conductors (pairs). of an otherwise conventional telephone cable design are divided into at least two portions by plastic-coated metal foil strip or tape. Measurements between pairs, divided by this plastic-coated metal foil. of unwanted energy transferred from one conductor to another by means of mutual inductive. capacity, or conductive coupling (crosstalk). shows greatly improved properties over undivided cable pairs or divided cable pairs of prior art.
  • FIG. l3 PLASTIC COVERING POLYETHYLENE GREASE
  • the shield has the efiect of reducing so called near end" crosstalk since the weak attenuated currents coming in at a repeater point are in a compartment of the cable electri cally shielded from a large amplified current entering the conductors in the other compartment of the cable.
  • the instant invention also envisions and incorporates the concept of two distinct bundles of conductors inside a cable structure, one such bundle being electrically shielded from the other bundles and neither one of the aforesaid bundles necessarily being concentric around the other.
  • a cable with a shield is formed by arranging a group of conductors into a cylindrical bundle, spirally wrapping or twisting tapes of aluminum foil, either per se or coated with a plastic such as polyethylene terapthalate (Mylar), upon the cylindrical bundle of insulated wires, and then mounting another group of insulated wires, preferably equal in number, outside of the shielding tape in the form of a concentric cylindrical bundle, upon which another sheath of plastic, or other material, is applied in the usual manner.
  • a plastic such as polyethylene terapthalate (Mylar)
  • Nyquist US. Pat. No. 1,979,402, (179/78), teaches that the shielding material should be thin tape of soft iron, alternating with layers of copper.
  • Nyquist goes on to teach that while various materials may be used, iron (in particular soft iron) is preferred for one group of the alternating layers. This, according to Nyquist, is so because the product of the permeability by the conductivity of the iron is large, thereby making its attenuating effect large.
  • Nyquist teaches that the ratio of permeability of the iron to its conductivity is quite different from that of the copper or other conductive material, which may be used for the other alternating layers.
  • the prior art teaching concerned with the transmission of carrier energy along telecommunication cable, addresses its shield design solution to the use of alternating layers of different metals, e.g., copper and soft iron. At least one of these two metals is magnetic (soft iron).
  • the instant invention addressed its solution to the same problem by using alternating layers of a metal and a nonmetal, neither one of which is magnetic.
  • the instant invention uses as its shield, an aluminum foil either per se or coated with a plastic, such as polyethylene terapthalate.
  • the prior art teaches that the materials to be used must have electromagnetic properties such that the product of permeability and conductivity should be as large as possible and that the ratio of permeability to conductivity should be as much different as possible from one material to the other. This is not the case in the instant invention where there is used as a shield. an aluminum foil either per se or coated with a plastic.
  • a foil is defined the same as found on page 18 of the METALS HANDBOOK, Eighth Edition, published by the American Society for Metals, to wit: A foil is a' metal in sheet form possessing a thickness of less than 0.006'inches.
  • FIG. I of which is a cutaway pictorial view of one embodiment of the instant invention, showing two groups of conductors separated by a longitudinally disposed circumscribing foil shield;
  • FIG. 2 is a pictorial cutaway view of another embodiment of the instant invention, similar to that shown in FIG. 1, wherein the shield between the two groups of electrical conductors is not longitudinally but helically disposed;
  • FIG. 3 is an additional pictorial cutaway view of one of the embodiments of the instant invention, showing two groups of electrical conductors separated by a shield made from a plurality of tapes helically disposed, the lateral edges of which overlap adjacently lying tapes;
  • FIG. 4 is a portion of that cable shown in FIG. 2 in a cutaway view, emphasizing the helical seam formed by the overlapping terminal edges of a helically wound tape shield;
  • FIG. 5 is a cross-sectional view of a metal foil coated on both sides with a plastic, used to shield one group of electrical conductors from another;
  • FIG. 6 is a cross-sectional view of an uncoated metal foil shield
  • FIG. 7 is a cross-sectional view of an embodiment of a foil tape shield showing a metal foil coated only on one side by a plastic;
  • FIG. 8 is a cross-sectional view of a piece of metal foil shield having a plastic coating that completely surrounds said foil;
  • FIG. 9 is a cross-sectional view of that cable structure as shown in FIG. I, employing as a shield a metal foil coated on both sides with a plastic;
  • FIG. 10 is a cross-sectional view of that cable structure as shown in FIG. 3, employing a shield composed of a plurality of tapes made from a metal foil coated on both sides with a plastic, the lateral edges of which overlap adjacently disposed tapes;
  • FIG. 11 is a cross-sectional view of the cable structure as shown in FIG. I wherein the metal foil shield is completely surrounded by a plastic coating;
  • FIG. 12 is a cross-sectional view of that cable structure as shown in FIG. 3, wherein a shield composite is shown, made up of a plurality of metal foil tapes each of which is completely surrounded on both sides by a plastic;
  • FIG. 13 is a cross-sectional view of a cable structure showing four groups of insulated conductors, only two of which are longitudinally circumscribed by a shield made of metal foil coated on both sides with a plastic and the remaining groups being longitudinally circumscribed by a plastic tape;
  • FIG. 14 is a cross-sectional view of a cable structure the same as that shown in FIG. 13 except that the plastic coating on the metal foil shield or screen completely surrounds the foil screen;
  • FIG. 15 is-a cross-sectional view of a cable structure the same as that shown in FIG. 14 except that the shield is composed of a plurality of foil tapes, coated on both sides by a plastic, the lateral edges of which overlap adjacently disposed tapes;
  • FIG. 16 is a cross-sectional view of a cable structure the same as that shown in FIG. 15 except that the plastic coating of the metal foil completely surrounds the foil;
  • FIG. 17 is a cross-sectional view of a cable structure showing a screen or shield dividing groups of insulated electrical conductors that does not longitudinally circumscribe any group of conductors;
  • FIG. 18 through 21 inclusive are cross-sectional views of various metal shields used in that cable structure of FIG. 17;
  • FIG. 18 being a metal foil coated on both major surfaces with a plastic;
  • FIG. 19 being a metal foil coated only on one side with a plastic;
  • FIG. 20 being an uncoated metal foil;
  • FIG. 21 being a metal foil completely surrounded by a plastic coating;
  • FIG. 22 shows in schematic form, a wire twisting apparatus used to apply the plastic-coated metal foil shield in between first and second groups of electrical conductors;
  • FIG. 23 is an enlarged diagrammatic view of a rotating die member used to apply the plastic-coated metal foil shield between first and second groups of electrical conductors;
  • FIG. 24 is an exemplary plot of crosstalk values derived from the improved cable structure of the instant invention.
  • One embodiment of the cable to be considered herein is made up of the usual cylindrical plastic or lead sheath with the conductors arranged in the usual fashion, except that they are separated into two equal or substantially equal but separate concentric groups by means of an essentially cylindrical concentric shield.
  • the instant invention uses the plastic coating of the metal (aluminum) foil as a dielectric to keep unwanted currents [emitting from pinholes in the insulation of individual electrical conductors], from reaching the metallic shield (aluminum foil). It is quite obvious that when a metal foil, coated only on one side, is employed, that the bundle of electrical conductors in nearest proximity therewith is not protected by a dielectric from the electrical conductors, other than that dielectric used as the insulation on the electrical conductors themselves. Thus, there is in this instance a preference for the aluminum foil shield, coated on both sides with the polyethylene terapthalate (Mylar) dielectric.
  • Mylar polyethylene terapthalate
  • a metal foil which is completely surrounded on all sides by a plastic coating, e.g., an aluminum foil, completely surrounded by polyethylene terapthalate (Mylar), polyethylene, polypropolyene, polystyrene or PVC.
  • a plastic coating e.g., an aluminum foil, completely surrounded by polyethylene terapthalate (Mylar), polyethylene, polypropolyene, polystyrene or PVC.
  • An aluminum foil which is coated only on its two major surfaces with a plastic, still has exposed naked aluminum surfaces at the edges thereof. When considering a cable of many miles in length, this amount of exposed conductive metal becomes significant. Therefore, the instant invention takes this into account in one of two ways: the first way is to employ a metal foil which is completely surrounded by plastic.
  • such a foil would be envisioned as being aluminum with the plastic covering being polyethylene terapthalate (Mylar).
  • Mylar polyethylene terapthalate
  • Another way to mitigate undesirable electrical properties created by having an exposed surface (edge) of metal to the electrical conductors is to fill that portion of the space created by the plastic-coated metal foil shield not otherwise occupied by the electrical conductors therein with a polyethylene greaselike material. This greaselike material acts as both a dielectric protection, as well as an inhibitor of any subsequent incoming moisture. This particular feature will be more fully discussed later.
  • FIG. 1 the overall general configuration of the cable structure is exhibited by element (1).
  • Shown at (14) is a first group of insulated conductors, the outer peripheral surface thereof being longitudinally circumscribed by a plastic-coated foil shield shown at (15), this foil shield being either uncoated, coated on one or both of its major surfaces as well as completely surrounded by a plastic.
  • Indicated by element (16), is a second group of insulated electrical conductors disposed in an annular fashion on the outermost surface of the plastic-coated metal foil shield l5).
  • Mylar polyethylene terapthalate
  • This metal armor, having a thickness greater than a foil, (18) is a tapelike strip that has been longitudinally folded or wrapped around the plastic tape (17).
  • This particular piece of armor is in a sense an electrical, as well as a mechanical, shield and it can have a plastic, such as polyethylene, firmly adhered to either one or more surfaces thereof.
  • a molded plastic sheath (19) is the customary extruded polyethylene that can be and usually is filled with carbon black.
  • FIG. 2 Shown in FIG. 2 is essentially the same cable structure as that set forth in FIG. I.
  • the overall structure (2) differs from that cable structure (1) only in the respect that the plasticcoated metal foil shield (15) has lateral edges that overlap in a helically rather than a longitudinal fashion.
  • the metal shield (15) of FIG. 1, is longitudinally disposed, the lateral edges of the shield overlapping one another. See 1511])
  • a further cable structure is shown at (3) in FIG. 3, wherein the difference between structure (3) and (2) being that the shield of element (2) is formed from a plurality of tapes 15b), (15c), and (15d) I rather than a single tape.
  • the lateral edges of the helically disposed tapes overlap adjacently lying tapes.
  • a representative cross-sectional view of this particular cable structure is shown in FIG. 9.
  • Element (4) of FIG. 4 is a portion of the helically wound tape, as shown in FIG. 2.
  • the tape (15) of FIG. 2 was a single tape, and it was helically disposed around the first group of insulated electrical conductors (14). The lateral edges of this tape (15) overlap, forming the seam (14s).
  • Elements (5), (6), (7), and (8) of FIGS. 5, 6, 7, and 8, respectively, show a cross-sectional view of the particular metal foil tapes, both plastic coated and otherwise, used by the instant invention.
  • Element (5) shows a metal foil (6), coated on both sides with a plastic
  • element (6) shows an uncoated metal foil shield.
  • Element (7), of FIG. 7, shows a metal foil (6), coated only on one side, with a plastic coating [5 (a) 1.
  • Either one of the embodiments (5), (6), (7), and (8), shown in respective figures, are viable as a shield from both a structural and electrical standpoint.
  • Foil (6) has a thickness between 1 and 5 mils and is generally twice the thickness of plastic coating [5 (a)].
  • All of elements (5), (6), (7), and (8) of FIGS. 5, 6, 7, 8, as well as 18, 19,20 and 21, can be corrugated to increase its mechanical strength.
  • an electrical shield is meant.
  • the word shield has an accepted double meaning, i.e. electrical as well as mechanical (armor) protection, the metal foil shield of the instant invention connote primarily an electrical shield.
  • Element (9) of FIG. 9, shows a cross-sectional view of that cable structure as depicted in FIG. I.
  • Like numbers of FIG. I also represent like elements in FIG. 9.
  • the plastic-coated metal foil shield (15) is coated on its two major surfaces with a plastic; however, it can be seen by element (20), that thin strips of uninsulated metal are exposed to the first and second group of electrical conductors (l4) and (16) respectively.
  • pinholes in the electrical insulation of the insulated electrical conductors (14) or ticular plastic-coated metal foil shield is used to separate a (16), or the shield (15),.would allow unwanted electrical first group of insulated electrical conductors (14) from a energy to reach exposed portions (edges) ofthe aluminum foil second group of insulated electrical conductors (16).
  • the shield, through the edges (20) or pinholes in its plastic coatbalance of the cable structure is essentially the same as that ing. From an electrical standpoint, it is desirable to avoid this. 5 shown ,by element (9) of FIG. 9.
  • that innermost is also electrically desirable to keep moisture away from the cavity defined by the overlapping plurality of plastic-coated electrical conductors.
  • the instant invention envisions an metal foil shields (15), (15), and (15"), not otherwise occuembodiment in which a polyethylene greaselike material ori by insulated electrical conductors(14), can be essentially flooding compo n is i p s in th ca ity Created r filled with the same polyethylene grease described in associadefine y h f il hi l n h r i pi y n tion with the description of element (9) of FIG. 9. Also that lated electrical conductors (14).
  • the polyethylene greaselike material can be used i ment used to test well-known polyethylenes as define here to serve two functions: the first to provide a dielectric inby ASTM Dl238.65T. Essentially the same method as em- [erposed between the exposed metal edge and the insu- Ployed by this ASTM designation was Used to test this 25 lated electrical conductors (16) or (14); and the second to inpolyethylene grea elik materia x ep for slight modificasure the exclusion of water, either in the liquid or vapor state, tions.
  • the polyethylene grease used in the The first function is that of interposing a dielectric between structure ofcable (9) or (10) can not also be used here.
  • the second function is to exclude water, in any form, i.e., conductors (l4), defined by plastic-coated metal foil shield vapor or liquid, from ingressing into that area where the elec- (15), or that cavity defined between the plastic-coated metal trical conductors are situated.
  • the polyethylene foil shield (15) and plastic tape (17), not otherwise occupied greaselike material is a hydrophobic material, as shown by its by electrical conductor (16), or both, can be essentially filled extraordinary low (less than 0.01 percent) water absorption at with polyethylene greaselike material as previously discussed. 24 hours at I00 percent relative humidity.
  • water tight cable can be prothat of element (11), of FIG. 11, the polyethylene greaselike vided. That is to say, the cable using the polyethylene grease material serves basically as a water-repellant substance.
  • the plastic-coated foil shield (15) is not a 10.
  • the shield (15) is made up ofa pluraliplastic-coated metal foil shields is used, the plastic-coating of ty of tapes, the lateral edges of which overlap adjacently which completely surrounds the metal foil. Generally speakdisposed like tapes.
  • cable structure configuration can be designed for any size cable core circumference using just one given width of shield tape.
  • a plastic-coated metal foil tape comes in only one width and that width is less than the outer peripheral dimension of a core made up of insulated electrical conductors (14)
  • a plurality of tapes can be used to circumscribe the core, the lateral edges of the individual tapes overlapping adjacently disposed tapes.
  • a polyethylene greaselike material can be disposed in the innermost cavity created by overlapping plastic-coated metal foil shield (15), (15), (15"), not otherwise occupied by electrical conductors (14).
  • polyethylene grease can be disposed in that space created by the plastic-coated metal foil shields (I),
  • the polyethylene greaselike material has the primary function to exclude water from that space where the electrical conductors are disposed. However, it has a secondary function to provide a dielectric between the source of electrical energy, i.e., the electrical conductors (l4) and (I6), and any pinholes or other electrical access to the metal foil ofthe shields (15), and (15").
  • FIG. 13 Shown in FIG. 13, by element (22) is a further embodiment of the instant invention which shows the insulated electrical conductors divided into quad configuration. It is to be understood that like numbers represent like cable components as was shown in previously discussed figures.
  • This exemplary quad is made up of four groups of insulated electrical conductors (I4) and (16).
  • the two groups of insulated conductors shown at (14) are longitudinally circumscribed by shield or screen (15), which in this particular embodiment is made up of a single tape, the lateral edges of which overlap one another.
  • These particular tapes not only have a width that is equal to or greater than the outer peripheral dimension of the cores made up by the insulated electrical conductors (14), but also are made up of a metal foil coated on both sides with a plastic, such as that shown in element (5) of FIG.
  • insulated electrical conductors 16 are longitudinally circumscribed by a plastic tape (17a) which in this particular embodiment can be made up of the conventional polyethylene terapthalate (Mylar). Transmission of an electrical signal in a given direction is carried on the insulated conductors (14). Conversely, transmission of electrical signals in opposite or returning direction, is carried over insulated electrical conductors I6).
  • plastic tape (17a) which in this particular embodiment can be made up of the conventional polyethylene terapthalate (Mylar). Transmission of an electrical signal in a given direction is carried on the insulated conductors (14). Conversely, transmission of electrical signals in opposite or returning direction, is carried over insulated electrical conductors I6).
  • Polyethylene greaselike material can be used in this particular embodiment.
  • FIG. 14 Shown in FIG. 14, by element (23) is another embodiment of the instant invention, which shows insulated electrical conductors divided into a quad configuration.
  • This exemplary quad is made up of four groups of insulated electrical conductors (14) and (16), The two groups ofinsulated electrical conductors shown at (I4) are longitudinally circumscribed by a shield or screen (15), which in this particular embodiment is made up ofa single tape as was the case in FIG. I3.
  • This tape has a width that is at least equal to but preferably greater than the outer peripheral dimension of the cores made up by the insulated electrical conductors (I4), and are made up of a metal foil completely coated on all sides with a plastic, such as that shown by element (8) of FIG. 8.
  • insulated electrical conductors 16 are two additional groups of insulated electrical conductors (16). These particular insulated elcctri cal conductors are longitudinally circumscribed by a plastic tape (17a), which in this particular embodiment can be made up of the conventional polyethylene terapthalate (Mylar). Transmission of an electrical signal in a given direction is carried on the insulated electrical conductors (14). Conversely, transmission of electrical signals in an opposite or returning direction, is carried over insulated electrical conductors I6 Polyethylene greaselike material, the same as previously discussed, can be used in this particular embodiment.
  • any one or any combination of all the following cavities can be filled with the polyethylene greaselike material: that cavity defined by the plastic-coated metal foil shield (15), not otherwise occupied by insulated electrical conductors (I4); that cavity defined by plastic tape (17a), not otherwise occupied by insulated electrical conductors (16); or that cavity defined by a plastic tape (17), not otherwise occupied by insulated electrical conductors (16), plastic tape (17a), insulated elec trical conductors (l4), and plastic-coated metal foil shield (15).
  • FIG. 15 Shown in FIG. 15, by element (20) is another embodiment of the instant invention, which shows insulated electrical eonductors divided into a quad configuration.
  • This exemplary quad is made up of four groups of insulated electrical conductors (l4) and (16).
  • the two groups of insulated electrical conductors shown at (14) are longitudinally circumscribed by a shield or screen (I5), which in this particular embodiment is made up of a plurality of tapes.
  • These particular tapes have a width that is less than the outer peripheral dimension of the cores made up by the insulated electrical conductors (l4), and are a metal foil and coated on both sides with a plastic, such as that shown in element (5), FIG. 5.
  • insulated electrical conductors are two additional groups of insulated electrical conductors (I6). These particular insulated electrical conductors are longitudinally circumscribed by a plastic tape 1711), which in this particular embodiment can be made up of the conventional polyethylene terapthalate (Mylar). Transmission of an electrical signal in a given direction is carried on the insulated electrical conductors (14). Conversely, transmission of electrical signals in an opposite or returning direction, is carried over insulated electrical conductors (16).
  • Polyethylene greaselike material can be used in this particular embodiment.
  • any one or any combination of all of the following cavities can be filled with the polyethylene greaselike material: that cavity defined by the plastic-coated metal foil shield (I5), not otherwise occupied by insulated electrical conductors (14); that cavity defined by plastic tape not otherwise occupied by insulated electrical conductors (16); or that cavity defined by plastic tape (17), not otherwise occupied by insulated electrical conductors (16), plastic tape (17a), insulated electrical conductors (I4), and plastic-coated metal foil shield (15).
  • FIG. 16 Shown in FIG. 16, by element (21) is another embodiment of the instant invention, which shows insulated electrical conductors divided into a quad configuration. Like numbers represent like cable components as was shown in previously discussed figures.
  • This exemplary quad is made up of four groups of insulated electrical conductors (l4) and (16).
  • the two groups of insulated electrical conductors shown at (I4) are longitudinally circumscribed by a shield or screen (15), which in this particular embodiment is made up of a plurality of tapes. These particular tapes have a width that is less than

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Communication Cables (AREA)
  • Insulated Conductors (AREA)
US778073A 1968-11-22 1968-11-22 Telephone cable with improved crosstalk properties Expired - Lifetime US3622683A (en)

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US77807368A 1968-11-22 1968-11-22

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US3622683A true US3622683A (en) 1971-11-23

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BR (1) BR6912448D0 (xx)
DE (2) DE6945245U (xx)
FR (1) FR2023912A1 (xx)
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US7317163B2 (en) 2004-12-16 2008-01-08 General Cable Technology Corp. Reduced alien crosstalk electrical cable with filler element
US7612289B2 (en) 2004-12-16 2009-11-03 General Cable Technology Corporation Reduced alien crosstalk electrical cable with filler element
US7317164B2 (en) 2004-12-16 2008-01-08 General Cable Technology Corp. Reduced alien crosstalk electrical cable with filler element
US7157644B2 (en) 2004-12-16 2007-01-02 General Cable Technology Corporation Reduced alien crosstalk electrical cable with filler element
US7208683B2 (en) 2005-01-28 2007-04-24 Belden Technologies, Inc. Data cable for mechanically dynamic environments
US20100263907A1 (en) * 2006-03-06 2010-10-21 Belden Technologies, Inc. Web for separating conductors in a communication cable
US8030571B2 (en) 2006-03-06 2011-10-04 Belden Inc. Web for separating conductors in a communication cable
US7999184B2 (en) 2008-03-19 2011-08-16 Commscope, Inc. Of North Carolina Separator tape for twisted pair in LAN cable
US10573430B2 (en) 2008-03-19 2020-02-25 Commscope, Inc. Of North Carolina Separator tape for twisted pair in LAN cable
US11424052B2 (en) 2008-03-19 2022-08-23 Commscope, Inc. Of North Carolina Separator tape for twisted pair in LAN cable
US9418775B2 (en) 2008-03-19 2016-08-16 Commscope, Inc. Of North Carolina Separator tape for twisted pair in LAN cable
US9978480B2 (en) 2008-03-19 2018-05-22 Commscope, Inc. Of North Carolina Separator tape for twisted pair in LAN cable
US20090236120A1 (en) * 2008-03-19 2009-09-24 David Allyn Wiebelhaus Separator tape for twisted pair in lan cable
CN104798145A (zh) * 2012-11-13 2015-07-22 Ls电线有限公司 屏蔽电缆
CN106847394A (zh) * 2012-11-13 2017-06-13 Ls电线有限公司 屏蔽电缆
US9390838B2 (en) 2013-03-15 2016-07-12 Commscope, Inc. Of North Carolina Shielded cable with UTP pair environment
US9330815B2 (en) * 2013-08-14 2016-05-03 Apple Inc. Cable structures with insulating tape and systems and methods for making the same
US20150047873A1 (en) * 2013-08-14 2015-02-19 Apple Inc. Cable structures with insulating tape and systems and methods for making the same
US9991030B2 (en) * 2013-10-23 2018-06-05 Belden Inc. High performance data communications cable
US20180286539A1 (en) * 2013-10-23 2018-10-04 Belden Inc. High performance data communications cable
US10236099B2 (en) * 2013-10-23 2019-03-19 Belden Inc. High performance data communications cable
US10832833B2 (en) 2013-10-23 2020-11-10 Belden Inc High performance data communications cable
US20170036620A1 (en) * 2014-05-21 2017-02-09 Yazaki Corporation Wire harness
CN104733124A (zh) * 2015-02-27 2015-06-24 安徽卓越电缆有限公司 一种煤矿用防鼠蚁屏蔽电缆
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Also Published As

Publication number Publication date
BR6912448D0 (pt) 1973-01-04
IL32985A (en) 1973-06-29
DE1958603A1 (de) 1970-06-11
FR2023912A1 (xx) 1970-08-21
GB1289554A (xx) 1972-09-20
IL32985A0 (en) 1969-11-30
DE6945245U (de) 1970-02-26
GB1289553A (xx) 1972-09-20

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