WO2002017334A9 - Cable - Google Patents

Cable

Info

Publication number
WO2002017334A9
WO2002017334A9 PCT/US2001/026407 US0126407W WO0217334A9 WO 2002017334 A9 WO2002017334 A9 WO 2002017334A9 US 0126407 W US0126407 W US 0126407W WO 0217334 A9 WO0217334 A9 WO 0217334A9
Authority
WO
WIPO (PCT)
Prior art keywords
cable
shielding layer
insulated cable
present
substantially covers
Prior art date
Application number
PCT/US2001/026407
Other languages
English (en)
Other versions
WO2002017334A1 (fr
Inventor
George M Baldock
Original Assignee
Neo Circuit Inc
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
Application filed by Neo Circuit Inc filed Critical Neo Circuit Inc
Priority to AU2001286695A priority Critical patent/AU2001286695A1/en
Publication of WO2002017334A1 publication Critical patent/WO2002017334A1/fr
Publication of WO2002017334A9 publication Critical patent/WO2002017334A9/fr

Links

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
    • H01B7/0861—Flat or ribbon cables comprising one or more screens

Definitions

  • the present invention relates generally to a cable used preferably for connections between electronic video and audio components. More particularly, the present invention relates to shielded coaxial, fiber optic and other cables.
  • Cables used in connecting video components to each other and to cable outlets have generally been of the coaxial variety.
  • Such cables generally comprise a main conductor, some shielding elements, a ground conductor and an external plastic insulating material all generally formed in an elongated cylindrical configuration. While adequate signal transmission has been achieved with such cables, modern uses for cables requires that a variation in the sizes and shapes, particularly of the cross-sectional shapes, of such cables be available.
  • cables having round cross-sections limits the placement of cables.
  • round cables can not be placed on floors as they are subject to rolling and are likely to cause an individual to trip if stepped upon. Placement of cables beneath rugs or carpeting causes unsightly lumps to appear in the floor covering and can lead to premature wear and tear on the floor covering. Further, such cables can not be attached to a wall or ceiling without the use of unsightly fasteners, such as cable nails or U-shaped fasteners.
  • the signal transmitted in the cable of the present invention generally travels about planarly in a zig-zag like pattern.
  • the cable of the present invention provides signal transmission at the level of the finest co-axial cables without generating errant interfering transmissions.
  • the present invention concerns an insulated cable shielded for transmission of RF, comprising a central conductor having an intermediate insulating layer that substantially covers the central conductor.
  • the cable further includes a first discrete shielding layer consisting of a homogeneous electrically conductive material that substantially covers the intermediate insulating layer and shields the central conductor from RFI.
  • a second discrete shielding layer consisting of a homogeneous electrically conductive material that substantially covers the first shielding layer and shields the central conductor from EMI are also included.
  • an outer insulating layer that substantially covers the second shielding layer and protects the insulated cable from damage by external forces, wherein the insulated cable has a noncircular cross-section.
  • the insulated cable of cable has a noncircular cross-section and a thickness of less than about 0.10 inches.
  • the insulated cable of the preferred embodiment has a generally rectangular cross- section. It has been determined that the insulated cable of the preferred embodiment, because of its noncircular cross section carries a signal by radiating the signal within the cable from a center conductor in a zig-zag like pattern.
  • the cable is provided with shielding elements that allow the non-circular cross- section with no diminution in signal strength or interference.
  • the cable can be manufactured in a variety of shapes without having signal strength or shielding problems. Such shapes as rectangular, flat, semi-circular or having the shape of certain moldings generally used in wall decorations are possible.
  • the present invention allows for such cables, which can have relatively thin cross-section, to be flexible such that they can be bent to follow the contours of a wall, ceiling, floor or other surface. Further, as the cable of the present invention has a generally flat surface along a length of the cable, the cable can be attached to any surface by the use of adhesives, including adhesive tape or glue.
  • the wiring system includes a connecting module, an insulated cable, and a plug assembly.
  • FIG. 1 is a perspective view of a cable of the present invention.
  • FIG. 1 A is an end view of another embodiment of the cable of the present invention.
  • FIG. 2 is a perspective view, partially cut away of another embodiment of the cable of the present invention.
  • FIG. 3 is a side elevational view, partially cut away, of the cable of FIG. 2.
  • FIG. 4 is a perspective view, partially cut away, of a coaxial cable of the prior art.
  • FIG. 5 is another perspective view of a coaxial cable of the prior art.
  • FIG. 6 is a perspective view, cut away, of a cable made in accordance with the teachings of the present invention.
  • FIG. 7 is another perspective view of a cable made in accordance with the teachings of the present invention.
  • the present invention is directed to a cable 512.
  • Cable 512 is illustrated as low profile cable.
  • the low profile cable 512 provides sufficient shielding so that it can be used with 75 ohm service similar to conventional coaxial cable.
  • the low profile cable 512 also provides sufficient shielding so that the low profile cable can be used with the transmission of digital signals.
  • the cables, and particularly the shielding elements of the cables, of the present invention can to be used in connection with fiber optic cables and other cables without departing from the novel scope of the present invention.
  • the low profile cable 512 has a thickness of approximately 0.05 inches. It is to be understood that low profile cable 512 can have any desirable thickness without departing from the novel scope of the present invention.
  • the low profile cable 512 While it is possible for the low profile cable 512 to have a width that is approximately the same as the height, the width is preferably between about 0.25 and 0.50 inches to enhance the ability of removably securing the low profile cable 512 to a wall surface (not shown) using an adhesive. It will be understood, by persons having skill in the art, that the present cable may be made with any number of ratios of width to height which can be described as thin profiled, without departing from the novel scope of the present invention.
  • Figure 3 shows a profile view of a coaxial cable showing the relative thin profile of the cable.
  • Figure 1 A shows a cross-sectional view of one embodiment of the cable of the present invention, showing a rectangular cross-section of a thin profile cable.
  • the low profile cable 512 includes a central conductor 524, which is preferably fabricated from copper and has a thickness of between 16 and 20 gauge, preferably 18 gauge. It is to be understood by those having skill in the art that the central conductor 512, which may be of a variety of gauges of wire, may or may not be tin coated without departing from the novel scope of the present invention. Tin coating provides a means to prevent oxidation of the conductor and thereby help maintain as strong a signal as possible.
  • An intermediate insulating layer 528 is formed over the central conductor 524.
  • the intermediate insulating layer 528 can be formed from two pieces 529 of flexible polyethylene (PE) which acts as a dielectric coating that are adhered to each other.
  • PE flexible polyethylene
  • intermediate insulating layer 528 can also be created by injection molding or it can be extruded without departing from the novel scope of the present invention. It will also be understood by persons having ordinary skill in the art that any dielectric material, having similar properties, may be used as an intermediate insulating layer without departing from the novel scope of the present invention.
  • the two polyethylene pieces 529 may be made in a range of between 0.01 and 0.02 inches but are preferably of a thickness of approximately 0.016 inches. It is to be understood that pieces 529 can have any desirable thickness without departing from the novel scope of the present invention.
  • the polyethylene pieces 529 have been tapered so that a thickness of the polyethylene pieces 529 is smaller proximate edge surface of the polyethylene pieces 529. It is to be understood that tapering to other shapes can also be made without departing from the novel scope of the present invention.
  • the intermediate insulating layer 528 can be formed from gas injected foam.
  • the intermediate insulating layer 528 has a thickness of about 0.016 inches where the central conductor 524 extends through the intermediate insulating layer 528. It is to be understood that layer 528 can have any desirable thickness without departing from the novel scope of the present invention.
  • a first shielding layer 540 is applied of the intermediate insulating layer 528 so that the first shielding layer 540 substantially covers the intermediate insulating layer 528.
  • the first shielding layer 540 is preferably fabricated from aluminum or Mylar and has a thickness of between 0.0005 inches and 0.002 inches but preferably being approximately 0.001 inches. It is to be understood that layer 540 can be manufactured from other materials and have any desirable thickness without departing from the novel scope of the present invention. It has been found that the use of aluminum or Mylar, in the form of thin sheets, as in the present embodiment, typically provides 100% coverage within the layer.
  • a second shielding layer 542 is preferably applied over the first shielding layer 540 so that the second shielding layer 542 substantially covers the first shielding layer 540 creating a second dielectric shield.
  • the second shielding layer 542 is preferably fabricated from polyethylene and has a thickness of between 0.001 inches and 0.015 inches, preferably having a thickness of approximately 0.008 inches. It will be understood that layer 542 can be made of any desirable thickness without departing from the novel scope of the present invention. It is particularly desirable to use the second shielding layer 542 when the low profile cable 512 is used for the transmission of digital signals.
  • a third shielding layer 544 is preferably applied over the second shielding layer 542 so that the third shielding layer 544 substantially covers the second shielding layer 542.
  • the third shielding layer 544 is preferably fabricated from a copper sheet and has a thickness of between 0.0005 inches and 0.002 inches, preferably having a thickness of approximately 0.001 inches.
  • layer 544 can be made of any desirable thickness without departing from the novel scope of the present invention. It is to be further understood, that layer 544 may be made of copper ribbon, foil or a braid, without departing from the novel scope of the present invention. It will be understood by persons having skill in the art that the use of a braid in the outer shielding element of the present invention may be the preferred method of manufacturing the cable of the present invention, due to the availability of copper braid. The third shielding layer 544 is particularly useful to provide EMI shielding.
  • An outer insulating layer 526 substantially covers the third shielding layer 544 and thereby protects the components of the insulated cable 512 from being damaged.
  • the outer insulating layer 526 is preferably formed from polyvinyl chloride, which is extruded over the third shielding layer 544.
  • Layer 526 can be formed of any number of plastic materials that provide shielding and can be injection molded or extruded without departing from the novel scope of the present invention.
  • the present cable may be made in a variety of cross-sectional shapes, each having the same components described above.
  • Figs. 4 and 5 it will be seen that normal coaxial transmission across a cable radiates from center conductor 524 and is continuously contained within the cable by a shielding layer 590.
  • the signal bounces around the conductor 524 in a corkscrew-like fashion until the signal reaches the receiver, or other equipment.
  • the signal also radiates from the center conductor 524, however, but does not travel in a corkscrew-like fashion to the receiver.
  • the signal within the cable of the present invention is wavy or zig-zag - like across the width of the cable (somewhat planarly, depending on the thickness of the cable).
  • the signal takes the path of least resistance, moving forwadly and side to side where the shielding layer is farthest from the center conductor 524.

Landscapes

  • Insulated Conductors (AREA)

Abstract

Cette invention se rapporte à un câble isolé (512) ayant une section transversale non circulaire avec un certain nombre d'éléments de blindage (540, 544). Ce câble est capable de servir de support à des transmissions généralement prises en charge par un câble coaxial et il possède une section transversale de profil mince. Grâce à la présence d'éléments de blindage particuliers disposés selon une nouvelle configuration, ce câble offre un blindage équivalent au câble coaxial le mieux profilé rond, tout en ayant une section transversale mince et non circulaire.
PCT/US2001/026407 2000-08-22 2001-08-22 Cable WO2002017334A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001286695A AU2001286695A1 (en) 2000-08-22 2001-08-22 Cable

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US22712000P 2000-08-22 2000-08-22
US60/227,120 2000-08-22

Publications (2)

Publication Number Publication Date
WO2002017334A1 WO2002017334A1 (fr) 2002-02-28
WO2002017334A9 true WO2002017334A9 (fr) 2003-04-03

Family

ID=22851820

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/026407 WO2002017334A1 (fr) 2000-08-22 2001-08-22 Cable

Country Status (2)

Country Link
AU (1) AU2001286695A1 (fr)
WO (1) WO2002017334A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20320838U1 (de) * 2003-01-20 2005-06-09 Leoni Kabel Holding Gmbh & Co. Kg Datenkabel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643007A (en) * 1969-04-02 1972-02-15 Superior Continental Corp Coaxial cable
US4835394A (en) * 1987-07-31 1989-05-30 General Electric Company Cable assembly for an electrical signal transmission system
US5084594A (en) * 1990-08-07 1992-01-28 Arrowsmith Shelburne, Inc. Multiwire cable
CA2180983C (fr) * 1996-07-19 2005-10-11 Douglas Ryan Brunt Cable-ruban en argent

Also Published As

Publication number Publication date
AU2001286695A1 (en) 2002-03-04
WO2002017334A1 (fr) 2002-02-28

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