Conductor only

A shielded electrical cable is described having improved interference immunity and radio frequency screening by virtue of the mode of application of the shield. The shield is insulated from the inner conductor or conductors and comprises a pair of coaxial wire braid layers separated by a continuous metal...     

A cable for high frequency use in an environment with high and varying thermal changes whereby the thermal expansion of the cable is controlled by having a highly electrically conductive metal bonded to a metal of low coefficient of thermal expansion relative to the high electrically conductive metal....     

Shielded electrical cable of the high voltage type having a central conductor with a semiconducting coating surrounded by polymeric insulation, has a shielding assembly that includes a semiconducting layer around the insulation and a multiplicity of aluminum wires which can be grounded, which are individually...     

A cable screen for multipair communication cables is formed in the general shape of an H with the cross member being expandable by the application of gas pressure. The expansion process also aids in reducing the size of air pockets in any viscous cable fill present; and also creates a permanent duct...     

A cable shielding tape comprising a metallic strip such as aluminum and a tightly adhering layer of an adhesive copolymer of an .alpha.-olefin such as ethylene and an .alpha.,.beta.-ethylenically unsaturated carboxylic acid such as acrylic acid is provided with zones of reduced adhesion between the metallic...     

An electrical main cable has a continuous flat strip of flexible insulating material, which strip carries a plurality (e.g., three strips) of longitudinally-extending strips of conductive material in an electrically balanced configuration. To connect a branch cable to the main cable, an inductive-coupling...     

This invention relates to a transmission system for transmitting electrical signals whereby the conductor path consists of several sections of a cable which contain a number of twin conductors and wherein inductances are inserted at fairly great distances in the form of bi-filar chokes at least for the...     

A shield wire includes an inner conductor, a first dielectric surrounding the inner conductor, a second dielectric of Japanese paper placed over the first dielectric, a middle conductor relatively high in resistance placed over the second dielectric, a braid of copper alloy woven over the middle conductor...     

The electrical screening characteristics of a submarine coaxial cable are significantly improved by increasing the overlap between the longitudinal edges of the tape return conductor to at least 10% of the return conductor circumferential length.

This internally shielded telephone cable provides more efficient shielding for meeting near-end crosstalk requirements in carrier systems having expanded channel capacity and increase in equivalent frequency from 772 kHz to 1.576 MHz or higher. The improved shielding uses tapes bent into configurations...     

A shielded cable is disclosed in which a plurality of elongated conductor wires are interwoven with a plurality of metallic fiber strands to define a woven cover for isolating the conductor wires from electromagnetic interference. The woven cover includes a plurality of fiber warp strands woven with...     

An electrical conductor insulated with a cured heat resistant, radiation resistant, substantially dimensionally stable electrical insulation comprising a chlorinated polyethylene elastomer composition which has been electron cured with a dosage of at least 1 megarad. The product of the invention may...     

Improved transmission line voltage breakdown strength is achieved by applying magnetic fields in transmission lines. In colinear transmission lines, particularly coaxial cables, one means of magnetic field introduction is accomplished by applying an axial magnetic field about the transmission line, which...     

A cable shielding tape comprising a metal strip having a first adhesive layer of polymeric resinous material tightly adhered to at least one side thereof and a bond control layer of polymeric resinous material strippably adhered to the first adhesive layer, and plastic jacketed electrical power and communications...     

A cable structure for telecommunication or power supply applications, comprising one or more conductors, each of which is surrounded by a micatape embraced by an insulating layer of heat resistant rubber. The conductors are embraced by a thermoplastic elastomer on the outside of which there is placed...     

A cooled multiphase ac cable comprising a means for protecting the cable against the effect of the axial magnetic flux, made of a superconducting material in the form of a plurality of closed conductors separately embracing the surfaces of the internal and external layers of stabilized superconducting...     

A novel flat cable which has a number of parallel spaced conductors with tape segments having a conductive and insulative side woven between them at various positions along the length of the conductors. The weaving generally being done so that the conductive side touches alternate conductors. The whole...     

There is provided an improved electrical signal transmission cable having at least one signal-carrying center conductor and respective flanking ground conductors. The center conductor is surrounded by a thin layer of polymeric foam insulation. The foam insulated center conductor and the ground conductors...     

A construction for an electrical cable which carries an underwater transducer and is repeatedly reeled onto and from a hoist in a helicopter into the ocean to substantial depths. The cable includes a coaxial construction of copper conducting wires including a center conductor wound in a helix angle around...     

A multipair telephone cable (50) has been specifically developed for voice frequency and T1 carrier frequency transmission between cities. The copper wire gauge, dielectric diameter, and insulation expansion are uniquely designed so that this single cable design can be used for either air core or waterproof...     

A shielded wire having a central core and an insulation layer coated thereover. A shield layer separates the insulation layer from a ground wire and is formed by a composite tape having a metal surface and an adhesive surface. The metal surface is longitudinally folded to cover a portion of the adhesive...     

A cable assembly having a shielded conductor; the shielded conductor is formed by bonding a thin layer of conductive material to the outer surface of an insulated wire. The bonding may be achieved by coating the outside surface of the insulated wire with a metallic particle and solvent solution, and...     

A cable assembly for use in undercarpet wiring systems has a flat multiconductor cable encased in electrical insulation and an electrically conductive shield overlying the cable insulation, extending lengthwise with the cable and having successive extents which are respectively unsecured and secured...     

Shielded flat cable having low cross talk, low propagation delay and high propagation velocity including flat multiconductor cable core with convoluted surfaces, flat spacer strips trapping air in the cable surface convolutions and conductive sheathing held away from the cable core by the spacers.

A flat cable shielding device comprises a metal foil sleeve formed of an upper and a lower length of conductive metal foil. To aid the insertion of flat cable into the shielding device, a low-friction inside surface is provided on the inside surface of the metal foil sleeve. The outside of metal foil...     

A three phase gas pipe cable is disclosed which has at least one gas pipe cable section in which three phase conductors are arranged in a triangular configuration within an enclosing pipe. Each phase conductor is supported by at least one supporting insulator such that the longitudinal axis of each phase...     

An improved shielded ribbon cable arranged to expedite termination of the shield for grounding the shield. There is an isolator strip placed during fabrication of the cable between the conductor array and the shield; the isolator strip prevents flow of plasticized insulating material between the cover...     

Tubing and electrical cable utilizing shields made from a flexible metal tape that has a coating of a copolymer of ethylene with a monomer having a reactive carboxyl group bonded to at least one of its sides and to which coating is bonded an adhesive that is adapted to bond the coating to flexible or...     

A dielectric system for coaxial electrical conductors is provided. The dielectric system separates an inner and outer conductor and is composed of a first layer of braided high tensile strength polymeric fluorocarbon filaments in an open weave surrounding the inner conductor. Surrounding the layer of...     

A dielectric system for coaxial electrical conductors is provided. The dielectric system separates an inner and an outer conductor and is composed of a first layer of cellular polyparabanic acid. This layer directly contacts and provides a continuous skin circumferentially surrounding the inner conductor...     

This invention refers to a medium voltage electric cable (up to about 45 kV) comprising one or more cores, each of said cores being constituted by a conductor covered with an inner semiconductive screen, an insulation layer of extruded polymeric material (preferably, cross-linked polyethylene or ethylenepropylene...     

A high frequency attenuation cable which includes: a conductor; a high frequency absorption medium surrounding the conductor for attenuating high frequency energy through the cable; dielectric surrounding the absorption medium; electrical shielding surrounding the dielectric confining the high frequency...     

An insulated cable core is provided with a shield made of individual wires which are embedded in a first plastically deformable jacket which carries a water vapor impermeable sleeve made of wrapped or folded metal or metallized foil or ribbon whose adjoining edges are sealed. This sleeve carries a second...     

A three layer printed circuit board comprises upper and lower layers which provide terminal locations for connection to pins of electrical connectors or electronic components which are to be connected in parallel by conductor tracks of the circuit board. In order to achieve an even distribution of conductor...     

It has been discovered that the transient voltage which develops on the outer sheath of a coaxial cable under pulse voltage excitation is a result of the inequality between the self inductance of the sheath and the mutual inductance between the sheath and the center conductor. The self inductance of...     

An apparatus for producing a tape wrapped conductor by advancing and rotating the conductor as it moves from a source reel to a take up reel. Successively positioned adjacent the moving conductor are a first tape having an aluminum foil thereon, a drain wire, and an outer insulating tape, so that the...     

Absorptive shields for transmission lines, especially those tending to radiate electromagnetic wave lengths within a frequency range of from about 10.sup.6 to about 10.sup.10 hertz, especially 10.sup.7 to 10.sup.10 hertz. The shields are flexible materials filled with ferromagnetic, or ferrimagnetic,...     

A shielded wire in which an insulation layer covered wire and a ground wire are both covered with a conductive material layer. The ground wire is covered, furthermore, with a conductive high molecular material layer. The latter and the conductive material layer are in mutual contact so that they are...     

Two embodiments of a triboelectric transducer cable for generating a signal in response to movement or deformation of the cable each include multiple insulated central conductors, a semi-conductive wrapping separately surrounding each of the insulated central conductors with an additional conductor arranged...     

An electrical cable having a shielding comprised of knit or knit-graded wire having metal coatings.

Flexible electrical shielding conduit and method for making same wherein the conduit comprises multiple layers including a flexible conduit tubing outer layer, an electrical shielding layer disposed within the tubing and in contact with the conduit layer, and a woven retaining layer inside the shielding...     

The subject invention is directed to a cable comprising at least one center conductor, a dielectric surrounding said conductor and a plurality of metallic sheaths with at least two of said metallic sheaths separated, having a high series impedance and high propagation function for the path between said...     

Several flat cable embodiments (10, 10', 10", 10'", 10"") are disclosed, as are methods and apparatus (30) for the selective manufacture and connectorization of same. In accordance with one preferred flat cable embodiment (10), adapted for telephone under carpet applications, two precisely offset arrays...     

A cable assembly having a shielded conductor. The shielded conductor is formed by bonding a thin layer of conductive material to the outer surface of an insulated wire. The bonding may be achieved by coating the outside surface of the insulated wire with a metallic particle and solvent solution, and...     

A shielded line comprising a central wire; a shielding conductor disposed around the central wire; and the central wire and shielding conductor being divided into first, second and third parts where (a) the central wires of the first and third parts are connected to the shielding conductor of the second...     

A shielded flat electrical cable is formed of a plurality of twisted pairs of conductors. Individual conductors of each conductor pair are twisted about each other for at least one portion of their mutual length. The conductors are laminated to a film to maintain predetermined spacing and the electrical...     

An improved flat cable in which parallel, spaced conductors are embedded in an expanded, porous polytetrafluoroethylene insulation and then placed between layers of polytetrafluoroethylene having a higher dielectric constant than the porous insulation. The dielectric constant between conductors can be...     

A device and method for wrapping a wrapping material to form S-shaped shields around a cable core of two side-by-side core units in which two tubes are provided for passage of the core units. A space between the tubes accepts the thickness of a central region of the wrapping material which has side portions...     

A dielectric system for coaxial electrical conductors is provided. The dielectric system separates an inner and outer conductor and is composed of a first layer of braided high tensile strength polymeric fluorocarbon filaments in an open weave surrounding the inner conductor. Surrounding the layer of...     

A transmission line having substantially reduced far-end forward wave crosstalk is characterized by a single layer of dielectric material having a thickness chosen to provide a forward wave coupling constant K.sub.F substantially equal to zero. The dielectric layer is located on a ground plane, and has...     

Three or more groups of individually insulated conductors are optionally separately wrapped with insulating material and then either singly or collectively encircled with metal tape material. The groups are secured together by a strengthening steel tape and surrounding protective jacket. By way of example,...     

A fully shielded flexible ribbon cable having transmission line electrical characteristics and flexible ribbon cable mechanical characteristics capable of easy mass termination. The cable has a plurality of circular uniformly spaced signal conductors lying in a single plane encased in insulation having...     

There is provided an improved flat electrical communications cable which includes a plurality of coplaner pairs of elongated, insulated conductors. The pairs of conductors are embedded in a jacket which supports the cable and maintains the spacing among the conductors and pairs. The spacing between conductors...     

In an electrical cable comprising a plurality of conductors extending in a spaced parallel relationship in a common plane surrounded by outer layers of insulating material joined by web portions, certain conductors are surrounded by inner layers of insulating material which are in turn surrounded by...     

According to the present invention, a shielded electrical cable comprises an outer layer of insulating material surrounding a signal conductor and an associated ground conductor and a common shielding layer in electrical contact with the ground conductor but separated from the signal conductor by an...     

A stripline cable is provided comprising a dielectric layer and a plurality of sets of narrow signal conductors and wider ground conductors which are disposed in confronting relation to each other with the dielectric layer sandwiched therebetween. The signal and ground conductors are alternately arranged...     

RF absorbing magnet wire is disclosed made up of an electrical conductor such as copper or aluminum coated with at least one layer of polymeric insulation containing electrically and/or magnetically conductive particles. The wire may be made up of a plurality of insulating layers with the particles in...     

A cable which provides suitable shielding over a relatively wide range of frequencies includes a core (22), and inner shield (32), an outer shield (34) which engages electrically the inner shield, and a jacket (60). Each shield is a laminate which includes a metallic layer comprising a suitable metallic...     

The cable includes a flat cable including a plurality of elongate conductors enclosed in an insulative casing and a drain wire supported thereon. A wire mesh ground shield overlies the casing in contact with the drain wire along its length. An upper layer of insulation overlies the ground shield and...     

A flexible free-stripping composite cable assembly having a plurality of groups of electrical conductors including power supply, telephone and CATV/DATA conductors. Each group of conductors is contained within a distinct portion of a common insulation jacket. The jacket portions are connected by integral...     

An electromagnetic shielding material for absorbing electromagnetic energy has been found. The shielding material is flexible and has a thin conductive core with a composite ferrite material deposited around the core. The composite ferrite material is a mixture of ferrite powder and a binder for binding...     

An electrode and a lead wire therefor used with a device for measuring the electrical signals emanating from a living body, such as a cardiograph or electroencephalograph employed for examination and diagnostic purposes. The electrode consists of two layers of finely divided electrically conductive material,...     

A transmission cable (30, 50, 70, 80) for an ignition system of a fuel burning engine has a body of electrical insulation (31, 51, 71, 81). The cable has embedded in its insulation either a distributed or lumped parameter capacitive element (32-35, 52-55, 72-75, 82-84) connected in parallel with either...     

A shielded ribbon cable is formed either by trimming a conventional ribbon cable to expose one or both edge conductors, and coating the cable by painting it with a conductive paint or covering it with an extruded conductive plastic layer, or by forming a ribbon cable of individually-coated wires, one...     

A ribbon coax cable comprises a plurality of parallel and coplanar center conductors each surrounded by a dielectric sheath, a conductive member surrounding each dielectric sheath, a plurality of coplanar drain conductors each of which extends parallel to a respective center conductor and in electrical...     

A transmission cable (30, 50) for an ignition system of a fuel burning engine has a body of electrical insulation (31, 51). The cable has embedded in its insulation either a distributed or lumped parameter capacitive element (32-34, 52-53) connected in parallel with either a distributed or lumped parameter...     

A sleeve for installation on an electrical conductor for shielding the conductor with respect to the environment in which the conductor resides against electromagnetic interference (EMI). The sleeve is formed of a tubular member made of heat recoverable material and having, in the non-recovered condition,...     

In order to improve the transmission characteristics and to prevent distortions, a signal cable with two juxtaposed insulated conductors with connecting elements is proposed, in which each conductor is surrounded by its own coaxial individual screen and the screens are insulated against the connecting...     

Insulated electrical conductor for telecommunications cable in which two layers of insulation are provided. The inner of the two layers is a solid non-cellular construction and the outer layer is cellular. The nominal mutual capacitance between the conductor and an identical conductor is at a desired...     

An electrical cable assembly for use in particular with undercarpet wiring systems has a flat multiconductor cable encased in electrical insulation, an insulative film extending lengthwise on the cable and an electrically conductive member overlying the film lengthwise, the conductive member having successive...     

A shielded electric wire having an electric conductor, a high expansion insulating layer provided on the electric conductor, a rigid skin layer on the insulating layer, and a closed shield layer on the skin layer. The closed shield layer is produced by winding a number of electric wires on the insulating...     

A recoverable fabric for example a weave having a conductive metal warp and a recoverable polymeric weft may be provided with solder to provide an article for screening electrical components.

A concentric three-conductor cable includes an inner conductor and outer conductors formed of braided strands, and insulating material separating the outer conductors from each other and from the inner conductor, each the other conductors being formed of a plurality of layers and the d-c resistance of...     

A shielded multiconductor flexible cable for protection against EMI and/or RFI is disclosed. The shielded cable is comprised of a plurality of conductors disposed between two layers of insulating substrates, said cable having a graphic shield disposed on the exterior surface of at least one of the insulating...     

A circuit board comprises a substrate made of a semi-insulating or insulating material, an insulating layer formed on the substrate and having a lower dielectric constant than the dielectric constant of the substrate, and a plurality of wiring conductors formed at predetermined intervals on the insulating...     

A high speed electrical transmission line is provided comprising a plurality of elongate conductor wires arranged in parallel relationship and encased in an outer insulating covering jacket having generally a rectangular cross-section and wherein each conductor is further encased within the outer jacket...     

An electrical transmission line is provided comprising at least one elongate signal conductor, one or more other conductors placed away from and substantially parallel to said signal conductor, all conductors encased in an outer insulating resin covering having a rectangular cross-section, the signal...     

A support board or substrate is disclosed for interconnecting various electronic components. One or more conductors are imbedded within the substrate for interconnecting the components. Each conductor is provided with shielding to permit the exchange of high frequency signals between the components without...     

A low profile, wide body modular plug and a multi-conductor shielded cable for termination therein and use with a low profile modular jack adapted to be mounted on a printed circuit board in a closely-spaced array. The low profile design of the plug features latching arms mounted on the outer side walls...     

An improved electrical cable construction is provided wherein the metallic screen is coated with a protective coating which comprises a layer of a polymer selected for its properties of high flexural modulus, high tensile strength and high melting point and an adhesive layer comprising a random, block...     

A multi-layer circuit board which includes at least two boards carrying conductors and a shielding foil interposed between the two boards. The circuit board is provided with a through hole including a metallic lining in electrical connection with the shielding foil. The lining includes an insulating...     

A high performance controlled impedance low loss low attenuation cable having the characteristics of a shielded twisted pair cable is disclosed. The cable contains a plurality of pairs of associated conductors located in a single plane to give a low profile flat cable suitable for use in undercarpet...     

A microstrip transmission line comprises a plurality of signal-carrying lines disposed along a dielectric ribbon and separated by a predetermined spacing. Ground-plane conductors are disposed on the opposite side of the ribbon in staggered relation to the signal-carrying lines such that the ground-plane...     

This invention provides a fabric for RFI/EMI shielding wherein the fabric is woven, braided or warp knitted from yarns which comprise conductive fibers and non-conductive fibers wherein the conductive fibers comprise from about 10% to about 80% by weight of the fabric.

A parallel data transmission system (20) comprises a cable (40) which is capable of balanced mode transmission but which is driven in an unbalanced mode. The cable includes a plurality of twisted pairs of individually insulated conductors (42--42) enclosed by a metallic shield (54). The twist lengths...     

A flat multiconductor electrical cable assembly is disclosed. The cable assembly includes a plurality of electrical conductors surrounded in an insulative casing. An insulative sheet overlies the insulative casing and separates a wire mesh ground shield therefrom. An outer cover encloses the entire cable...     

An electrical transmission line of the twisted pair of coaxial cable type is provided. One line has a center conductor, a porous plastic dielectric disposed around the outer periphery of the conductor, the dielectric having specific gravity of 0.5 or less, and having a plastic dielectric sheath disposed...     

An electrical transmission unit line is provided comprising a porous dielectric layer having positioned on one side thereof a pair of narrow, parallel elongated electrical conductors and on the other side thereof, opposite the pair of conductors and extending transversely across both wires of the pair...     

An improved flexible shielded electrical coaxial cable is provided having a shielding layer surrounding a core line, wherein the shielding layer comprises a plurality of metal wires helically overwrapped about the core line, adjacent wraps being in close contact, wherein the improvement comprises at...     

Disclosed is a flat tubular jacket of flexible sheet plastic having a separable interlocking seam bridging the overlapping opposite lateral edges of an elongated one piece main body for use in snugly enclosing one or more ribbon cable conductors. The interior of the main body is provided with heat-formed...     

A shielding tape for wrapping an electrical conductor is formed from an laminate of a conducting fold layer and an insulating dielectric layer. One longitudinal edge of the laminate is folded back with the foil layer inner most so as to define a pocket which contains a multi-strand ground wire. The shielding...     

In making coaxial interconnection boards according to this invention coaxial conductors are scribed onto a circuit board substrate. The coaxial conductors are preformed and affixed in a predetermined pattern on the substrate using an adhesive. A conductive layer forming a ground plane covers the surface...     

A flexing connector for suppressing electromagnetic radiation from an electrical cable connecting moving and stationary elements of a machine has a shield surrounding a signal cable which includes an inner coil of wire wound in a generally helicoidal form with a flat cross-section with the signal cable...     

A shielded electrical cable includes a central conductor wire, a dielectric core over the conductor wire, a metallic foil shielding tape over the dielectric core and an insulated outer jacket over the shielding tape. The shielding tape is wrapped on the dielectric core so that one edge portion of the...     

Disclosed is a unitary shielded boot for assembly about a separable connector interconnecting a pair of multiple conductor shielded cables. The boot has a flexible plastic main body lined with conductive shielding and provided with a separable plastic seam lengthwise of its exterior. A shielded guard...     

A large scale integrated circuit package is described wherein insulating layers of an organic material are provided between wiring layers to reduce the characteristic impedance of signal wiring. To avoid deformation of the organic insulating layers and subsequent damage to wiring layers, leads for connecting...     

A cable (20) which is particularly suited to the transmission of substantially error-free data at relatively high rates over relatively long distances includes at least two pairs of individually insulated conductors (42--43). Each pair of individually insulated conductors is enclosed individually in...     

An ignition cable which applies ignition current from a power source to a spark plug of a spark ignited internal combustion engine while attenuating radio frequency currents. An inner elongated electrically conductive metallic core made of a high permeability material has an electrically semiconductive...     

A heat-shrinkable electrically shielding tubular article is provided with an electrically conductive lining on its inner surface, which lining is formed of a continuous coating of a metal which deforms without cracking during recovery so that after recovery the coating will remain continuous and adhered...     

An electrically conductive removable jacket is provided for wire bundles or the like. The jacket comprises a flattened knitted metal wire tube with a strip of hook and loop fastener stitched along each longitudinal edge so that a tubular jacket is formed by overlapping the edges and securing the fasteners....