Abstract: A cable for transmitting electromagnetic signals has a central conductor. A pair of insulator filaments, each having a circular cross section, are twisted around each other to form an insulator wrap. The insulator wrap is helically wound around the conductor. An insulator sheath, provided as an outer cover for the cable, surrounds the wrapped central conductor and is supported by the insulator wrap. Since the insulator sheath is offset from the conductor, an enclosed air space is formed between the sheath and the conductor in the spaces not occupied by the insulator wrap. The twist pitch of the filaments and the pitch of the wrap around the conductor can both be modified to adjust the amount of insulator material located in the air space and thereby the cable's effective dielectric constant, which effects the propagation speed of the electromagnetic signals carried by the cable.

Abstract: A cable for transmitting electromagnetic signals has a central conductor. A pair of insulator filaments, each having a circular cross section, are twisted around each other to form an insulator wrap. The insulator wrap is helically wound around the conductor. An insulator sheath, provided as an outer cover for the cable, surrounds the wrapped central conductor and is supported by the insulator wrap. Since the insulator sheath is offset from the conductor, an enclosed air space is formed between the sheath and the conductor in the spaces not occupied by the insulator wrap. The twist pitch of the filaments and the pitch of the wrap around the conductor can both be modified to adjust the amount of insulator material located in the air space and thereby the cable's effective dielectric constant, which effects the propagation speed of the electromagnetic signals carried by the cable.

Abstract: A thin coaxial cable is provided comprising an inner conductor; an outer conductor being an electroplated conductive metal layer; a thin electrically insulating layer made of a polymeric enamel resin or of glass of at most approximately 15 &mgr;m thickness separating said inner and said outer conductor; said insulating glass or polymeric enamel resin layer is coated with a layer of an adhesion promoting primer material or said insulating polymeric enamel resin layer is coated with a layer of ABS resin, and an electroless plated metal layer is deposited between said primer or ABS resin layer and said electroplated conductive metal layer.

Abstract: An apparatus connects a pair of open-ended electrical conduits together end-to-end. Each conduit has a channel portion with an open side and a cover portion for closing the open side of the channel portion. The apparatus includes a channel-shaped connector structure having an open side. The connector structure is receivable in an installed position engaging the open ends of the conduits, with the open side of the connector structure aligned with the open sides of the conduits. A fastener structure is mounted on the connector structure for movement with the connector structure relative to the conduits upon movement of the connector structure toward and into its installed position, and to restrain removal of the connector structure from its installed position.

Abstract: A coaxial cable has a return loss higher than 36 dB and a structural return loss higher than 38 dB within the frequency range from 500 to 1000 MHz. The coaxial cable has a polyolefin inner solid insulating layer having an adhesive strength of between 40 and 60 lb/in2 to a central conductor, an intermediate foamed polyolefin layer surrounding the polyolefin inner solid insulating layer, an outer polyolefin solid insulating layer surrounding the intermediate foamed polyolefin layer, a metallic screen layer that has of a shield made of a metallic foil and a braid surrounding the outer polyolefin solid insulation layer, and a protective jacket surrounding the metallic screen layer.

Abstract: A method of making a coaxial cable includes forming a conductive tube and setting a settable material therein to define an inner conductor. Forming may include advancing a conductive strip and bending it into a tube having a longitudinal seam. The settable material may be dispensed onto the conductive strip continuously with the forming. Alternately, the settable material may be dispensed onto the conductive strip prior to advancing. The dispensing may use a puller cord as the settable material or carrying some or all of the settable material. The method may further include forming a dielectric layer surrounding the inner conductor, and forming an outer conductor surrounding the dielectric layer.

Abstract: A bushing for high-voltage and medium-voltage gas-insulated metal-clad electrical switchgear includes a substantially cylindrical metal jacket surrounding a conductive busbar. It also includes a conductive material annular member disposed around the jacket and a cap surrounding the jacket at a distance and adapted to define with the jacket a closed space delimited at one end by the annular member, which is adapted to be sacrificed by being partly melted if an internal arc pierces the jacket and reaches it. This kind of bushing prevents molten metal and hot gases from spraying out following an internal arc.

Abstract: The amount of air dielectric in air core coaxial and twinaxial cables is increased by spacer structures installed between the center conductor and the outer shield which have provision for air voids or pockets running lengthwise. The extra air space provides lower effective dielectric constant for the cable. In one embodiment, a single-element extruded spacer is formed with air cavities or voids that run continuously throughout the length of the spacer. Several spacer “profiles” or cross-sections are disclosed that place less solid dielectric mass in proximity to the center conductor. The result is a greater volume of air dielectric, and hence a lowered cable dielectric constant. In a further embodiment the spacer is a circular cross-sectioned element consisting of a central dielectric strength member surrounded with foamed material. Strength strands such as Kevlar® may be added to the spacer.

Abstract: A apparatus for joining coaxial line sections for high-power RF signals includes a feature that permits the impedance and the electrical profile of the inner joining element to remain comparatively uniform as the sections of coaxial conductor change dimensions with temperature. The apparatus for joining coaxial line sections further includes a feature in the outer joining element that compensates for impedance lumps caused by the nonuniform profile of the inner element at the joints.

Abstract: An electrical connector for a cable, a sleeve for a cable, and a method for fabricating an electrical connection. The connector, sleeve, and the method can all used for high-voltage electrical devices, for example, x-ray generating devices. In particular, the invention may be used for high-voltage electrical devices fabricated with an encapsulant, for example, a silicone potting material. In one aspect of the invention, the connector provides a high-voltage electrical connection having an integral bond between the high-voltage cable and the encapsulant with little or no air gaps. The connector includes a high-voltage cable having a sheath made from a first material, for example, polyethylene, and a sleeve made from a second material, for example, a silicone-based material, that is compatible with the encapsulant. Other aspects of the invention include a method for fabricating the connector and the sleeve used in the connector.

Abstract: A method and apparatus for EMI shielding that is economical and adaptable on high voltage interconnection cables in corona charging systems. The shield can be implemented without loss of efficiency in the transmission of low-level currents from the power source to the charging device.

Abstract: The invention relates to a post insulator (4) whose surface (41, 51) is geometrically configured, in at least one area (4a) between an inner conductor (2) and encapsulation (3) for a gas-insulated switchgear assembly (1) such that surface discharge paths (6b) are provided between the inner conductor (2) and the encapsulation (3) and have a subsection in the opposite direction to the bridging direction (7). In consequence, surface discharges (6a) can be diverted in the opposite direction to an original propagation direction (7), and come to rest by self-blocking. Exemplary embodiments relate to: an indentation (4b) which is concave and is open toward the inner conductor (2) and/or toward the encapsulation (3) and is formed between a cup shaped barrier (5) and the base body (40) of the post insulator (4); diversion of surface discharges (6a) through up to 180° for efficient self blocking; and adhesive bonding (45) of the barrier (5) on a conventional post insulator (4).

Abstract: A cable management bracket for a telecommunications rack. The bracket includes an elongated member having a length sized to extend across a width of the rack. A plurality of fingers project outwardly from the elongated member. The fingers are spaced apart along the length of the elongated member. Gaps sized to receive telecommunications cables are positioned between the fingers. Bend radius limiters are preferably connected to the fingers to prevent cables passing through the gaps from being bent beyond predetermined bend radius requirements.

Abstract: A pressurized gas circuit-breaker pole includes a first enclosure or pole head having a first envelope with a first connecting flange including a circular orifice. The envelope contains a first mobile assembly terminating in a coupling member coaxial with the orifice. A second enclosure constituting an insulative column includes a second envelope having a second connecting flange with a circular orifice. The second envelope contains a second mobile assembly having a link for maneuvering the first mobile assembly and its end including complementary arrangements for coupling it with the coupling member. The connecting flange of each enclosure has an annular elastomer seal fixed to the corresponding connecting flange and through which the corresponding mobile assembly passes. The seal of each enclosure provides, during assembly of the flanges and coupling of the internal mobile assemblies, a sliding seal. The seal is broken on completion of assembly.

Abstract: A cable for conducting electronics signals in proximity to a source of electromagnetic interference, the cable has at least one longitudinally extending conductive wire having a diameter and an outer surface and a spacing member substantially coaxially disposed around the at least one wire and having a diameter and an outer surface, wherein the ratio of the diameters of the spacing member and the wire is about 4:1 and the spacing member contains no EMI shielding constituent.

Abstract: An ignition cable constructed according to a method for optimizing an ignition cable, the cable including at least a capacitor, where the ignition cable carries current from a power source to a spark plug located in a combustion chamber. The ignition cable includes a center element structured to communication electric current from the power source to the sparkplug and an insulator surrounding the center element. The conductor is removably coupled to a ground, and surrounds at least a portion of the insulator. The center element, insulator and conductor form a capacitor having an optimal capacitance value that is determined by finding a maximum capacitance value and subtracting a safety margin.

Abstract: A coaxial cable (coax) has successive layers of a hollow non-conductive inner core, a conductive inner layer, an insulating layer, a conductive outer layer, and a non-conductive outer layer.

Abstract: In a three-phase integrated gas insulated bus, three vertical outlets 3 are formed in the longitudinal direction of a cylindrical bus enclosure 1 and three horizontal outlets are formed in almost the same axial position as these vertical outlets 3 in the circumferential direction. The three-phase main bus conductors 7 are laid out to ensure that one side of a triangle having the apexes where three-phase main bus conductors 7 are located is approximately parallel to these horizontal outlets 4. The main bus conductors 7 are extended to the three vertical outlets 3 sequentially starting from the main bus of the phase closest to the vertical outlets 3, and branch buses 8 and 9 are led from the tip positions thereof to the vertical outlets 5 and horizontal outlets 6.

Abstract: Interconnections are made through a planar circuit by a monolithic short-circuited transmission path which extends from a circuit portion of the planar circuit to the opposite side. The opposite side is ground sufficiently to remove the short-circuiting plate, thereby separating the previously monolithic conductors, and exposing ends of the separated conductors of the transmission path. Connection is made between the exposed conductors of the transmission path and the registered contacts of a second planar circuit by means of electrically conductive, compliant fuzz buttons. The transmission path may be a coaxial path useful for RF.

Abstract: An ignition cable constructed according to a method for optimizing an ignition cable, the cable comprising at least a capacitor, where the ignition cable carries current from a power source to a spark plug located in a combustion chamber. The ignition cable comprises a center element structured to communicate electric current from the power source to the spark plug and an insulator surrounding the center element. The conductor removeably coupled to a ground, and surrounds at least a portion of the insulator. The center element, insulator and conductor comprise a capacitor having an optimal capacitance value that is determined by finding a maximum capacitance value and subtracting a safety margin.

Abstract: A coaxial cable structure incorporating a physical interruption in the outer jacket or sheath of the cable. This interrupts the continuity of the outer conductor and serves to block DC (direct current) and low frequency electrical signals. Also, it greatly reduces heat transmission along the cable. The interruption is achieved by placing a specially fabricated stub in series with the coaxial cable. The resulting coaxial cable assembly acts like a band-pass filter which, although blocking DC and lower frequency electrical signals, is able to transmit RF (radio frequency) signals at selected frequencies. The entire assembly, including the stub, can be made hermetic.

Abstract: A cable wire having a core conductor 11, an insulator 12 surrounding the core conductor, and an outer conductor 13 surrounding the insulator 12 is provided. The core conductor 11 is made of a metallic material including copper and silver so as to have a tensile strength of 120 kg/mm2 or more and an electric conductivity of 60 to 90% by IACS. The cable wire 1 is also employed in a coaxial cable 2 and a coaxial cable bundle.

Abstract: A method and a resulting communication cable is disclosed which provides multiple degrees of control of fluid wicking propensity within the interior of the cable by impregnating the cable with a sealing composition and curing the sealing composition therein. The cable includes a central strata, a penultimate strata and an ultimate strata concentrically disposed. The central strata includes a central signal transmission medium circumscribed by a dielectric having an etched exterior surface. The penultimate strata includes a braided conductor circumscribing the dielectric and an inner jacket surrounding the braided conductor and including an etched exterior surface. The penultimate strata further includes at least one non-continuous zone of sealing composition impregnated into the braided conductor and bonding with the etched exterior surface of the dielectric. The ultimate strata includes a braided sheath circumscribing the inner jacket and an outer jacket surrounding the braided sheath.

Abstract: In the laying of communications cables in the interior of pipes, in which hot substances are conveyed, it is important to provide communications cables of this type with long-term protection against the surrounding aggressive heat. The communications cable is not laid directly in contact with this aggressive hot environment in that at least one continuous cavity is arranged around the cable core of the said communications cable, which cavity is sealed by a sleeve. In order to be able to extract heat which inevitably diffuses over time from the hot environment into the said cavity, a medium is advantageously conveyed through the cavity. Only in this way is it possible to maintain a constant temperature around the cable core on a long-term basis and to accordingly obtain a long-life communications cable laid, for example, in district heating pipes.

Abstract: A coaxial high-frequency cable is described which having an inner conductor (1), a dielectric spacer (2) surrounding the inner conductor (1), and a tubular outer conductor (3) which is applied over the dielectric (2) and which is concentric with the inner conductor (1). To ensure operability in the event of a fire, the spacer is constructed from a combination of an insulating thermoplastic material and a mineral material.

Abstract: Removing the electrical field from the internal volume of high-voltage structures; e.g., bushings, connectors, capacitors, and cables. The electrical field is removed from inherently weak regions of the interconnect, such as between the center conductor and the solid dielectric, and places it in the primary insulation. This is accomplished by providing a conductive surface on the inside surface of the principal solid dielectric insulator surrounding the center conductor and connects the center conductor to this conductive surface. The advantage of removing the electric fields from the weaker dielectric region to a stronger area improves reliability, increases component life and operating levels, reduces noise and losses, and allows for a smaller compact design. This electric field control approach is currently possible on many existing products at a modest cost. Several techniques are available to provide the level of electric field control needed.

Abstract: A cable for conducting electronic signals in proximity to a source of electromagnetic interference, the cable comprising:

Abstract: Removing the electrical field from the internal volume of high-voltage structures; e.g., bushings, connectors, capacitors, and cables. The electrical field is removed from inherently weak regions of the interconnect, such as between the center conductor and the solid dielectric, and places it in the primary insulation. This is accomplished by providing a conductive surface on the inside surface of the principal solid dielectric insulator surrounding the center conductor and connects the center conductor to this conductive surface. The advantage of removing the electric fields from the weaker dielectric region to a stronger area improves reliability, increases component life and operating levels, reduces noise and losses, and allows for a smaller compact design. This electric field control approach is currently possible on many existing products at a modest cost. Several techniques are available to provide the level of electric field control needed.

Abstract: Interconnections are made through a planar circuit by a monolithic short-circuited transmission path which extends from a circuit portion of the planar circuit to the opposite side. The opposite side is ground sufficiently to remove the short-circuiting plate, thereby separating the previously monolithic conductors, and exposing ends of the separated conductors of the transmission path. Connection is made between the exposed conductors of the transmission path and the registered contacts of a second planar circuit by means of electrically conductive, compliant fuzz buttons. The transmission path may be a coaxial path useful for RF.

Abstract: A coaxial cable includes an inner conductor made of a number of conductive strands which are twined to form a wire rope which is drawn through a die to reduce its diameter until the outer surface of the cable is substantially smooth and the cross section of the cable is substantially circular, an outer conductor concentrically around the inner conductor, and a dielectric between the inner and outer conductors. The strands of the cable may be a single metal or alloy wires, or may be plated wires. The outer conductor may be a highly flexible metallized tape which is helically wrapped around the dielectric. As such, the coaxial cable has substantially greater flexibility. According to a second embodiment, a coaxial cable includes inner and outer conductors, and a dielectric therebetween. The dielectric includes an outer cross-sectional shape which is preferably different from an inner cross-sectional shape of the outer conductor.

Abstract: A cable is proposed, particularly a coaxial cable, with an internal conductor (1), an insulation (4) which encloses the internal conductor (1), an external conductor encompassing several elements (2) extending essentially in the longitudinal direction of the cable and resting on the insulation (4), and with a cladding layer (3) which rests on the elements (2) of the external conductor and on the insulation and encloses same, where the cross section of the surface (6) of the insulation (4) vertical to the longitudinal direction of the cable is a polygon, and the cladding layer (3) rests on the corners (7) of the polygon.

Abstract: A coaxial cable [10, 50] includes an inner conductor [11] that is separated from an outer conductor [13] by a layer of insulating material [12]. The outer conductor includes a thin sheet of metallic foil that envelops the insulating material and has a seam [14] that extends in the longitudinal direction of the cable. In a first embodiment, the insulated conductor is axially rotated (twisted) with respect to its own longitudinal axis. In a second embodiment, the outer conductor is wrapped around the layer of insulating material. In both embodiments, there is relative rotation between the insulated conductor and the outer conductor. This practice is referred to as relative insulated conductor rotation, and it significantly improves the structural return loss characteristics of a coaxial cable when the outer conductor includes an asymmetry, such as a seam, that extends in the longitudinal direction of the cable.

Abstract: The present invention relates to a metallic shielded cable having a wire braid shield coated with a non-gel and non-powder anti-corrosion coating and also to a coaxial cable having a central solid copper or copper clad conductor having a copper surface coated with an anti-corrosion benzotriazole composition. Also, the present invention relates to the method of producing a coaxial cable by coating a copper or copper clad conductor with an anti-corrosion benzotriazole composition prior to extruding a dielectric insulation on the conductor and to a method of preparing a coaxial cable wherein the coaxial cable has an aluminum wire braid and coating the wire braid with an anti-corrosion composition of a metal ionomers of ethylene and acrylic acid copolymers with the metal selected from the group consisting of Zn, Ca, Na and Mg, prior to extruding an insulation jacket around the aluminum wire braid.

Abstract: This patent application relates to a coaxial cable as well as to the manufacture of such a cable. Said cable comprises a central conductor and an outer conductor which are separated from each other by an electrically insulating layer, said outer conductor being provided, if necessary, with at least a protective coating. In accordance with the invention, the outer conductor of the cable comprises an electroconductive lacquer layer. In accordance with a preferred embodiment, a metal layer is applied to said lacquer layer. The cables in accordance with the invention can be manufactured much more rapidly than the known cables which comprise a stranded outer conductor or an outer conductor of metal foil. This advantage occurs in particular in the manufacture of very thin coaxial cables. In addition, the cables in accordance with the invention exhibit a satisfactory electromagnetic shielding.

Abstract: A gas-insulated tubular conductor arrangement is provided in which, in order to simplify the manufacture, transport and handling of the inner conductor, the support regions of the tubular inner conductor formed with the aid of columnar supports, are modified in that the inner conductor is formed, in the support region, by a short tubular intermediate piece manufactured by casting. The short tubular intermediate piece is connected at its ends with the adjoining inner conductor segments is fashioned in one piece with a respective blind-hole-type sleeve that surrounds one end of a columnar support.

Abstract: The pipeline section of the gas-insulated pipeline has an insulating gas-filled encapsulation including a polymer pipe. A current conductor is arranged inside the capsule pipe and extends parallel to the latter's axis and is supplied with a high voltage. This current conductor is retained by insulators that rest on the inside surface of the capsule pipe. At least one of a plurality of post insulators has a support ring resting on the mantle surface of the current conductor. At least three evenly distributed and hollow support elements are molded peripherally in a star shape on the support ring, each of which has transversely to a longitudinal axis a profile that is constructed in the shape of an arch or trapezoid. The support elements each have a shell-shaped foot. Each shell-shaped foot has a thickness (d) which is smaller than a distance (a) between the current conductor and the inside surface of the capsule pipe and smaller than a length (l) in an axial direction of the capsule pipe.

Abstract: A device for transmitting electrical energy or electrical signals comprises a core, an outer conductor and a threshold characteristic dielectric material between the core and the outer conductor. The dielectric material comprises, at least in part, a material that is insulative if the electric field is below a particular threshold and conductive when the electric field exceeds a particular threshold, so as to prevent the transmission of signals for which the electric field is above the threshold. The configuration of the core and/or of the outer conductor is such that the external electric field threshold from which the material becomes conductive is significantly less than the intrinsic breakdown threshold of the material.

Abstract: A connecting unit containing a four-segment inner conductor connection in an enclosure provided with two partitioning insulators and a installation opening, is used to provide easy mechanical access to an inner conductor of two partitioned sections of a gas-insulated, tubular conductor system, with one conductor segment of the inner conductor connection detachably connected in a shape of a claw to adjacent connector segments.

Abstract: An electrical line for installation in a well for transmitting power to a well pump includes a string of coiled tubing. An electrical cable having insulated electrical conductors embedded within an elastomeric jacket extends longitudinally through the interior passage of the tubing. Retainers are mounted to the electrical cable and spaced longitudinally apart from each other. An indentation is integrally formed in the tubing adjacent each of the retainers. Each indentation protrudes into the interior passage of the tubing and creates a ledge which is contacted by one of the retainers when the electrical line is installed in the well. The indentations and retainers transfer weight of the electrical cable to the tubing. Weld material is filled into the depression on the surface created by each indentation.

Abstract: Attachment points of an internal conductor in single-phase gas-insulated power transmission systems with tubular external and internal conductors are designed to have high dielectric strength and are of simple design, an end piece (6) of internal conductor is axially secured in a post insulator two head pieces (61, 71) radially and axially secured in a feed-through bore of the post insulator and axially connected to one another. The head pieces are configured as control electrodes. One head-shaped piece is also used as a plug contact with the adjacent internal conductor section.

Abstract: A cable system is provided which can accomodate electrical and optical cabling. The conductors of the system employ a layer which is impedance-matched to space, decreasing their cross-section to electromagnetic interference. The conductors of the system also employ a layer which symmetrizes electromagnetic interference signals, reducing the effect of interference and crosstalk on the signals carried by the conductors. The system also includes a node interface device for connection to a global electrical and fiber network. The node interface device connects to a user interface device through the cable.

Abstract: An enclosed high-voltage electric line having a high-voltage electric conductor (2) which is supported inside an enclosure (1) by one or more supporting elements (3, 4, 5), each with at least one insulator part (6, 7, 8). The conductor has at least one borehole (12, 13, 14) to accommodate one end of each supporting element (3, 4, 5). At least one supporting element has a metallic sleeve (9, 10, 11) that passes at least partially through the borehole, is supported in the area of the edge of the borehole, surrounds part of the insulator part and forms in its interior a stop (18) that limits displacement of the insulator part into the borehole.

Abstract: A subsea control cable includes an outer sheath and cables, conduits etc. arranged inside the sheath, and also at least one weight element. The weight element includes at least one strength member extending continuously along the entire length of the control cable, to which strength member there is attached a weight element or elements. The weight of the weight element in relation to the diameter of the control cable varies along the length of the control cable, e.g., from a predetermined minimum weight/diameter ratio, where the weight element consists only of the strength element, to a predetermined maximum weight/diameter ratio, where the cross-section of the control cable is filled to the maximum with the weight member.

Abstract: A gas insulated switchgear has a container which is filled with an insulating gas, a conductor disposed with the container, an insulator for supporting the conductor. An outer periphery of the insulator is made smooth so as to improve a dielectric strength of the device. The insulator is made of an organic substance base and an inorganic material filler added to the base. In order to improve the dielectric strength, the filler is atomised or the insulator is coated.

Abstract: A multiple conductor electric and/or electro-optic cable is disclosed which has a series of integral insulation components (vertebrae) of a very low dielectric resulting in an excellent electron flow. The preferred embodiment includes multiple conductor assemblies each having an elongated cylinder, and each having a plurality of strands of electrical conducting material helically wound and longitudinally disposed between the ends of the cable. The innermost and outermost of such assemblies may serve as the anode. Helically wound in an axially opposing direction and lying between the two anode assemblies is the cathode. There may be as many as four layers of insulating vertebrae (typically made of balsa) each radially separating the conductor layers. The vertebrae may be of equal length and longitudinally aligned or displaced in a variety of configurations depending upon the application. The conductors terminate at connectors coupled to the cable itself by a low dielectric link.

Abstract: A metal-sheathed high-voltage line with a high-voltage conductor and a metal sheath surrounding it coaxially has at least one securing element for a disk-shaped insulating support which has a first and second ring), each of which is concentric with the high-voltage conductor and each of which has a web projecting radially with respect to the longitudinal axis of the high-voltage line, where the insulating support is secured between the webs of the rings. The rings are jammed tightly by a wedge action on the high-voltage conductor.

Abstract: Uniformly spaced insulating buttons support two signal conductors within a tubular cable. The signal conductors are twisted from 180 to 360 degrees and are in physical contact with each other at their crossing point between each pair of buttons. Between each pair of buttons one of the conductors is covered with an insulating sleeve. The insulating sleeve alternates from one conductor to the other over the length of the cable. The conductors and buttons are enclosed within an insulating and supporting tubing. The supporting tubing is reduced in diameter or has corrugations to provide flexibility between each pair of insulating buttons. An overall shield composed of wires or foil is woven or helically wrapped to form a straight tube that surrounds the supporting tubing. The overall shield is electrically connected to system ground at the source end, allowing current flow only in the signal conductors.

Abstract: A ridged coaxial transmission line assembly including a plurality of parallel transmission paths is fabricated from an extrusion incorporating a plurality of slotted, longitudinal bores provided with centrally located conductors held in position by insulating stand-offs provides a structure performing the dual functions of electrically integral antenna mast and signal conductors for a linear array of antenna elements supported by the mast.

Abstract: The system serves to transmit electrical energy in conurbations. It has a gas-insulated cable (1) having at least one high-voltage electrical conductor (8) arranged in a pipe (101) filled with insulating gas. The gas-insulated cable (1) contains at least two underground cable sections (11, 12), which can be operationally interconnected at an installation point (5) accessible from the outside. Such a system is distinguished by high availability, is easy to maintain and can be produced in a method in which impairment of the infrastructure of the conurbation accommodating the system is largely prevented.

Abstract: An electrical line for a well pump has elastomeric supports clamped to the exterior of electrical cable for supporting the cable within coiled tubing. The cable supports have an elastomeric member that swells when contacted with a hydrocarbon liquid. Each expansion member is clamped to the cable exterior by retainers located at the ends. The expansion members are spaced apart longitudinally along the cable, and then the cable is inserted into the coiled tubing. Hydrocarbon liquid is pumped through the coiled tubing to cause the expansion members to swell into frictional engagement with the coiled tubing. The retainers direct the swelling laterally into tight contact with the coiled tubing.