Abstract: A gas filled electric conductor arrangement has an inclined surface (3A) at the bottom side of an electric conductor (3) that is formed by gradually reducing the cross section (D1, D2) of the electric conductor from one insulator spacer (2A) at one side toward another insulator spacer (2B) at the other side. Because of an angle (.theta.) of the inclined surface (3A), the spacing distance between the electric conductor (3) and the bottom surface (1A) of a grounded tank (1) increases depending upon the distance away from one insulator spacer (2A). Thereby, conductive foreign particles (50) are designed to be moved away from the surface of the insulator spacer (2A) and become trapped by a conductive foreign particle (1) disposed at the center bottom surface (1A) of the grounded tank.

Abstract: A variable impedance coaxial transmission line having a center conductor of constant cross-section, an outer conductor surrounding and coaxial with the center conductor and spaced radially therefrom, and a variable dielectric constant material between the center conductor and the outer conductor. The variable dielectric constant material has a plurality of alternating elements of high dielectric material and low dielectric material arranged along the center conductor from a first end to a second end of the center conductor. The invention also includes a reduced size, high-power broadband power/divider incorporating the variable impedance coaxial transmission line.

Abstract: Drain wires of a shielded cable are exposed, untwisted, and expanded into the approximate shape of a sphere. Pressurized gas is applied to the expanded drain wires. Simultaneously, the cores are bent to bow upstream of the gas flow, whereas the drain wires, being relatively flexible, bend downstream thereof. Even if low pressure gas is used, the cores and the drain wires can be sufficiently separated. This permits the insertion of a tool or the like between the drain wires and the cores and, therefore, facilitates automation of the process.

Abstract: A metallic sheath for an electric cable with a ratio of inner diameter Di to outer diameter Do of at least 0.9, comprises a lengthwise welded, annularly or helically shaped corrugated tube whose wall thickness is in a range between 0.005 and 0.009 of the outer diameter, and where the distance p between two neighboring corrugation crests is in a range between 0.08 and 0.12 of the outer diameter. In addition, a method of making the above described electric cable is described.

Abstract: A supporting insulator has an insulator body in the form of a disk and is made of a cured casting resin, and has at least one cast-in fitting to which high voltage is applied and which is cast in the insulator body and passes therethrough. The cast-in fitting has a cylindrically constructed outer surface which the insulator body encloses. A lip which tapers outwards and is closely connected to the outer surface of the cast-in fitting, is integrally formed on the insulator body. The lip mechanically decouples an edge zone of the insulator body from the actual insulator body.

Abstract: A buried armored power transmission line includes a metal jacket housing at least one conductive busbar. The line is equipped with a cooling device operating by transferring heat from the jacket to the surface of the soil, including a metallic structure fixed to the jacket and extending towards the surface of the soil. This structure has a plurality of vertical first plates connected to the jacket having a vertical dimension such that their top edge is at a permissible calculated depth.

Abstract: A cable used for transmitting the signals of a communications bus, such as a SCSI bus, having arbitration control signals subject to a wired-or glitch--such as the SCSI BSY signal. Low characteristic impedence conductors ensure that voltage reflections resulting from the deassertion of the BSY signal do not exceed a minimum threshold signal assertion voltage, allowing an increase in the maximum length of the SCSI bus cable.

Abstract: The present invention provides an insulating spacer for a high-voltage conductor constructed with a plastic made of an epoxy resin composition so that the volumetric specific resistance of the shield electrode increases toward the median point between a container and the conductor and a method for manufacturing shield electrode used therein. The insulating spacer according to the present invention can lessen the concentration of electric fields in the boundary areas between the shield electrode and the insulating member with the result that reliability is improved and service life is lengthened.

Abstract: A reinforced coaxial cable for underground service is disclosed. The cable generally includes an elongate center conductor, a surrounding dielectric material such as a foamed polymer dielectric, an outer conductor, a first jacket, an intermediate protective layer, and a second jacket. A ripcord can be positioned longitudinally between the first jacket and the intermediate protective layer to facilitate removal of both the intermediate protective layer and the second jacket. A tracer, or other visible indicia, extends longitudinally along the outer surface of the second jacket to facilitate locating the underlying ripcord. The intermediate layer and the second jacket provide increased impact resistance, cut-through resistance, and compressive strength, as well as increased resistance to abrasion and other frictionally induced damage. In addition, the intermediate layer and second jacket can be readily removed to allow increased flexibility or connectorization of the cable.

Abstract: A gas insulated device includes a grounded tank filled with an insulating gas and having a conical insulator spacer securely mounted therein to define an interior space. A through-type electric connector extends through and is supported by the insulated spacer and an electric conductor is electrically connected to the through-type electric conductor by a conductor connector. The conductor connector closest to the insulator spacer is positioned such that electric flux lines exiting from the conductor connector intersect with the surface of the insulator spacer in a region in which an electric field has a strength equal to or less than 70% of the strength of the strongest electric field on the surface of the insulator spacer generated by a lightning impulse applied to the gas insulated device.

Abstract: A joint with a boss for fitting to an assembly compartment for assembling together two adjacent lengths of a long-distance gas-insulated three-phase cable, the joint including a boss containing the seats of an externally-controllable valve whose drive combinations make it possible to establish communication independently either between the inside volumes of adjacent lengths, or the outside of the cable with the inside volumes of both adjacent lengths, or the outside of the cable with the inside volumes of one only of the lengths.

Abstract: A transmission cable system that incorporates cooling channels that encircles electrical conductors with coolant. The transmission cable system also provides for breach or leak detection. More specifically, the transmission cable system maybe used with an inductive charging system that transfers electric power from a power source to batteries of an electric vehicle. The cable system includes a cooling system for storing, cooling, and pumping coolant, and a pressure sensitive switch for determining the pressure in the cooling system and for providing an output signal indicative of a drop in sensed pressure. A controller is coupled to the pressure sensitive switch that is responsive to the output signal from the switch for shutting down the inductive charging system in the event of a drop in sensed pressure. The transmission cable is electrically coupled between the power source and the electric vehicle for coupling electrical power to the batteries.

Abstract: A gas-insulated single-phase cable for long-distance transport of electricity under high tension, the cable including a cylindrical steel case filled with nitrogen under a pressure of at least 10 hectopascals, an aluminum- or copper-based metal conductor held axially inside the steel case by closed insulating cones, and an aluminum case disposed at a short distance from the steel case and constituting a magnetic screen protecting the steel case from the magnetic field generated by the current carried by the conductor. The steel case is separated from the aluminum case by rings of plastics material or of filled polymer, such as polytetrafluoroethylene. Each rings is placed in a groove in a metal collar, with two adjacent portions of the aluminum case being welded to the collar.

Abstract: A gas-insulated high-tension three-phase electricity line which includes a cylindrical steel case and three conductors disposed parallel to the axis of the case, and a magnetic screen constituted by a cylindrical aluminum case placed inside the steel case and very close thereto. The conductors are held by a plurality of sets of three insulating arms secured to one another, the conductors being free to slide through openings formed in the arms, the aluminum case being separated from the steel case by strips of plastics material or of filled polymer having a low coefficient of friction.

Abstract: A modular, stackable insulating structure for a very high-voltage coaxial cable comprises at least three interspaced insulating tubes accommodating an inner conductor and an outer conductor of the coaxial cable. A plurality of ribs extending essentially radially along the longitudinal axis of the structure provide the spacing between adjacent tubes. The ribs are disposed in an optimized manner such that relatively effective zig-zag insulating paths are created between the inner and the outer conductors. The structure comprises cooling means.The insulating structure may be used for the transmission of electromagnetic pulses (power peaks) at voltages in the order of megavolts with rise times in the order of picoseconds.

Abstract: An electrical power transmission line is particularly adapted for the transmission of electrical power from relatively small and remotely located hydroelectric sites and over rugged terrain. The line has a plurality of conducting elements, preferably assembled from copper tubing or pipe with loosely fitting slip joints to allow for thermal expansion, with concentric outer insulating elements of polyvinyl chloride pipe or tubing, which insulating elements are hermetically sealed together. The conducting element is spaced apart from the inner walls of the insulating element by plural spacers installed therebetween, to provide an air gap between conductor and insulator.

Abstract: A cable used for transmitting the signals of a communications bus, such as a SCSI bus, having arbitration control signals subject to a wired-or glitch--such as the SCSI BSY signal. High propagation speed conductors increase the propagation speed of the BSY signal, resulting in a proportionate increase in the maximum length of the SCSI bus cable while maintaining adherence with the SCSI bus timing specifications.

Abstract: A three-phase electrical power line comprising a sealed tubular envelope of steel filled with insulating gas under pressure, e.g. nitrogen or carbon dioxide CO.sub.2, and having three conductive bars placed therein together with a thin tubular envelope of aluminum which is located between the steel envelope and the bars, wherein the conductive bars are held by collars made of non-magnetic material, having an outside diameter equal to the inside diameter of the aluminum tubular envelope, and possessing three radial arms which are screwed to tabs of insulating supports that enclose the conductive bars.

Abstract: The rigid coaxial transmission line disclosed herein is made up of multiple sections having outer conductors which are joined together at flanges and make up a desired length. Rather than being of equal length, the sections vary in length progressively to prevent the reflections caused by the flanges from accumulating at any frequency within the band at which the transmission line is to operate.

Abstract: The end flange (16) of the first encasing part (10) of the gas-insulated high-tension installation is an outer flange and includes through bores (34). A first securing ring (18) is provided on the end-face side of the end flange (16). The securing ring holds a first insulator (28). The first securing ring (18) includes through bores (36) which are in alignment with the through bores (34) and which have a stepped configuration. The step forms, in each instance, a counterabutment (42), which cooperates with the abutment (44) of the respective threaded bolt (38). To secure the first securing ring (18) on the first encasing part (10), the abutment (44) rests on the counterabutment (42) and, on the other side, the threaded bolt (38) is supported by the nut (48) on the end flange (16).

Abstract: A low attenuation coaxial cable for carrying microwave energy at GigaHertz frequencies includes a center conductor, dielectric surrounding the center conductor and an outer conductor encircling the dielectric. This outer conductor is formed by a plurality of longitudinally extending conductive wire strands positioned adjacent one to another with a slight helical lay along the cable. Internal ruggedization includes a bedding layer of indentable dielectric material encircling the outer conductor with a single-layer ruggedizing winding of strong wire sufficiently tightly wound around the bedding layer for partially indenting this strong wire into the bedding layer. A protective outer jacket of tough plastic material surrounds the ruggedization layer. The helical lay of strong wire in the ruggedization layer is opposite to the slight helical lay of wire strands of the outer conductor.

Abstract: The duct comprises an inner tube in which the wires are disposed, and this inner duct is placed inside an outer tube so as to provide a continuous inner space between the tubes, which completely surrounds the inner tube. A water inlet is in communication with the inner space and water is allowed to penetrate into the inner space upon the opening of a valve. The valve is operated by a fire detector. Upon activation of the valve in case of fire, water circulates through the inner space and is rejected into a drain. This system constitutes a fire and heat barrier for the wires of a building, for example.

Abstract: A coaxial cable conductor (20) comprises a center conductor (22) having a preselected longitudinal shape and a longitudinally split outer conductor (24). The split outer conductor (24) includes a first partial outer conductor (60) comprising a portion of the circumference of the outer conductor along its longitudinal length and a second partial outer conductor (62) comprising the remaining portion of the circumference of the outer conductor along its longitudinal length and mating with the first partial outer conductor (60) along two joints (64). The two partial outer conductors (60, 62) may be mechanically joined and sealed along the longitudinal joints against leakage of radio frequency energy, as by the application of a conductive coating along the joints. The center conductor (22) is supported within the outer conductor (24) by a plurality of electrically insulating dielectric supports (68), leaving an insulating air gap between the center conductor (22) and the outer conductor (24).

Abstract: One embodiment comprises:two bare parallel conductors made of bronze;two insulating rods that are substantially helically wound with non-touching turns around the conductors respectively so that the rods interfit and maintain a predetermined distance between the two conductors; andan insulating protective sheath.The helical pitch of the rods is much greater than the cross-section of the rods so the volume between the two conductors is mostly full of air, thereby obtaining reduced permittivity and thus increased propagation velocity. The invention is applicable to data transmission cables for computer machines.

Abstract: A high-voltage system has an insulation-gas filled metallic encapsulation which surrounds active parts to which voltage is applied. A first protective coating (3) is provided on the internal surface of the encapsulation, as it is on the external surface of the active parts. As a result, a high-voltage system is provided in which a reduction of the dielectric strength of the insulating gas paths cannot occur as a result of freely mobile particles (5). This is achieved by covering the first protective coating (3) at least partially with a second protective coating (4).

Abstract: In a coaxial electrical high-frequency cable, a spacer is provided between the internal conductor and the external conductor in order to maintain the operation of the cable even in the case of elevated ambient temperatures. The spacer can be a helical profile or of individual shaped pieces made of glass or ceramic materials.

Abstract: An improved method for making a flexible coaxial cable having an inner conductor (36) to which a dielectric material is secured to form a dielectric core (30) for the coaxial cable (38), and a flexible outer conductor (50) such as one formed from a strip helically wound conductor (58), employs a solid dielectric starting material (32), such as a spline dielectric or a cylindrical dieletric or an expanded dielectric, which is ccntrollably cut, such as by saw blades (34), using a desired cutting angle (.theta.) and blade width (.alpha.), in order to cut away a predetermined amount of the solid dielectric starting material (32) to provide a shaped dielectric core (30), such as a spiral or helix (30a, 30b), from the solid dielectric starting material (32).

Abstract: A method for making a flexible coaxial cable (38) in which a threaded dielectric core (30) is threadably inserted into a flexible hollow outer conductor sheath (50) to lock the core (30) to the outer conductor (50). The outer diameter (d3) of the core (30) is larger than the inside diameter (d2) of the outer sheath (50) such that the peak-to-peak diameter (d3) of the core (30) is 2/1000 of an inch-5/1000 of an inch larger than the inside diameter (d2) of the conductive sheath (50). The outer conductive sheath (50) comprises a corrugated portion (52) having a plurality of peaks (54) and valleys (56) at a predetermined pitch (P.sub.1) which may be the same or different than the pitch (P.sub.2) of the threaded core (30) with the valleys (56) becoming sufficiently embedded in the core (30) during threading to lock the core (30) and sheath (50) together to provide electrical stability for the cable (38) without causing mechanical deformation of the sheath (50).

Abstract: A low-torque microwave cable in which interior metal layers are coated with graphite particles and a process for coating the interior layers with graphite while flexing the cable to reduce stiffness by two-thirds.

Abstract: A single-pole gas-insulated line duct has a enclosing tube and an inner conductor held centered in place in the enclosing tube by support insulators. Electrode bodies embedded in arms of the support insulators engage either in a slot between flanges of sections of the enclosing tube or lie against the inside wall of the sections with a spring-action contact member. Locking members connect the support insulators and sections of the inner conductor. Coupling members can be introduced into abutting sections of the inner conductor and demonstrate mutli-surface sliding contact elements.

Abstract: A coaxial cable has a plurality of insulated beads threaded onto an inner conductor and individually having an exterior shape such that a gap exits between each adjacent pair of beads with the gap increasing in width radially. A conductive flexible braid ensleeves the beads with that braid having interstices ventive of air but preclusive of the passage of plasma. An insulative covering ensleeves the braid and also is ventive of air but preclusive of passage of the plasma. A connector includes a termination having a barrel-shaped body fitting over the outer cable conductor. An outer connector element projects outward from the outer end of the body with that element having longitudinal slots that define a circumferentially-spaced series of flexible fingers. Those slots are ventive of air but have a size sufficiently small to preclude passage of a plasma. An inner electrical connector element projects outwardly from the inner cable conductor beyond the body.

Abstract: A mine emergency communication cable and a method for use. The cable is comprised of a plurality of brightly colored, lightweight, strong synthetic fibers having a plurality of noninsulated tin plated copper wires and stainless steel wires at least one insulated copper wire interwoven with the synthetic fibers. At least two transceivers are inductively coupled to the cable creating a radio communication link. The noninsulated wires allow pieces of the cable to be connected by tying a knot in the cable. The insulated wire increases the communication distance by supporting the bifilar radio communication mode. The cable can also function as a physical guide which miners can follow to a safe location during a mine emergency.

Abstract: An insulating spacer comprises a plurality of unit spacers each of which has a hollow portion. The unit spacers are disposed between two members, such as electrodes, so that side walls of peripheral portions of the unit spacers are not aligned on a plane between the two members. There is no possibility that the space between the two members may be filled, for the most part, with insulating solid material; and a narrow gap may be present at the remaining minor part of the space. Therefore, there is no possibility of a local concentration of electric field between the two members.

Abstract: An improved bracket is disclosed formed by a tube element (10). Opposing slots (26, 28) are formed into the tube element a predetermined distance from a first end (22) of the tube element. The opposing arcuate sections (30, 32) defined by those slots are deformed by cooperating dies (34, 36) to form the bracket. The tube element (10) can be a tubular antenna (206) secured along an antenna rod (202).

Abstract: For each phase, a metal-clad line comprises a phase conductor surrounded by an aluminum sheath, with each aluminum sheath being surrounded by a sheath which is gas-tight relative to the outside. The inside of said gas-tight sheath(s) is/are filled with a gas having good dielectric properties. The aluminum sheath is made up of two half-shells with each half-shell being formed by a folded strip whose section is in the form of a semicircle terminated at each end by a shoulder and a flat, with the two half-shells being juxtaposed and assembled to each other via their flats. The invention also provides a method of manufacturing the metal-clad line which is particularly applicable to underground metal-clad lines.

Abstract: This invention concerns a new filler and floatability material as well as its manufacturing process.For instance, this new material can be used as a filler and floatability material (A) which separates tubes or cables (1,2) in a tubular unit that includes an external sheath (B) surrounding a harness of tubes or cables (1,2).In view of its make-up this material also participates in the thermal insulation of said tubes.The invention concerns also such tubular units which incorporate the new material.

Abstract: The present invention consists of a cable especially suited to the transmission of audio-frequency signals, cable in which one or more of the conductors is tubular. The conductors are constructed and spaced so that the assembly approaches theoretical and empirical ideals of electrical signal transmission. Further, the cable's terminations are designed to enhance transmission by bringing the conductors into direct contact with the connectors on the devices with which the cable is used.

Abstract: A cable and method for making such cable is disclosed. The cable is especially suited for high frequency applications in which electrical attenuation and dissipation factor are of critical importance. The cable comprises a tubular outer conductor, and at least one inner conductor for transmission of electrical signals. Between the inner and outer conductor is a foamed dielectric material. This dielectric is formed from the extrusion of an olefin polymer or a fluoropolymer with a blowing agent gas. Sulfurhexafluoride (SF.sub.6), rather than environmentally unsafe chlorofluorocarbons, is used as a blowing agent to foam the dielectric.

Abstract: A reinforced coaxial electric cable having low dielectric constant and a layer of convoluted dielectric insulation placed between either center conductor and conductive shield, optional porous dielectric and shield, or shield and jacket. FEP convoluted dielectric and expanded polytetrafluoroethylene insulation.

Abstract: An insulating spacer for use in a gas-insulated electric apparatus for supporting a high-tension electric conductor inserted through a metallic pipe enclosing an insulating gas, in which the insulating spacer is provided with a plurality of fins on its creeping surface, and in which fin intervals between the metallic pipe and one of the fins adjacent to the metallic pipe, between adjacent ones of the fins, and between the high-tension electric conductor and one of the fins adjacent to the high-tension electric conductor are formed in a manner so that the fin interval formed at a position where a creeping component electric field is high is made narrower than the fin interval formed at a position where a creeping component electric field is lower than that in the first-mentioned position.

Abstract: An improved radio frequency coaxial transmission line vacuum feed-through provided based on the use of a half-wavelength annular dielectric pressure barrier disk, or multiple disks comprising an effective half wavelength structure to eliminate reflections from the barrier surfaces. Gas-tight seals are formed about the outer and inner diameter surfaces of the barrier disk using a sealing technique which generates radial forces sufficient to form seals by forcing the conductor walls against the surfaces of the barrier disks in a manner which does not deform the radii of the inner and outer conductors, thereby preventing enhancement of the electric field at the barrier faces which limits voltage and power handling capabilities of a feedthrough.

Abstract: A gas insulated electrical apparatus comprises a hermetic sheath having a plurality of electrically conductive sheath sections each including flanged ends and a fastening device for fastening the flanged ends of the sheath sections together. A high voltage conductor is electrically insulatably supported within the sheath sections by an electrically insulating spacer which has a substantially uniform circumferential flange portion and is hermetically and securely held at the outer periphery thereof between the flanged ends of the sheath sections. An electrically insulating gas is disposed within the hermetic sheath. An electrically insulating member is interposed between at least one of the flanged ends of the sheath sections and the circumferential flange portion of the insulating spacer such that one portion of the electrically insulating member is exposed inwardly with respect to the hermetic sheath.

Abstract: A two conductor audio cable having no delay from end to end as a function of the frequency of audio signals conducted therethrough. There are a pair of conductor assemblies each comprising an elongated cylindrical core member of a flexible insulating material extending between the ends of the cable. A plurality of strands of an electrical conducting material are longitudinally disposed between the ends of the cable along the outer surface of the core member to define a cylindrical conductor which is, in essence, all "skin". The strands are electrically insulated from one another. A cylindrical support tube of a flexible insulating material is disposed over the core member and extends between the ends of the cable and is supported concentrically about and spaced from the core member by a helically wrapped support tube.

Abstract: An improved flexible coaxial cable (24) and method of making same employs an inner conductor (22) having a helically wound dielectric beading (20) wound thereabout in a predetermined pitch dependent on the desired velocity of propogation for the cable (24). A heat shrinkable dielectric tubing (26) surrounds the helically wound beading (20) and locks it to the inner conductor (22) to provide a dielectric core (28) having a constant pitch for the helically wound beading (20) during flexing of the cable (24). A convoluted outer conductor (30, 32, 34, 36) is locked to the tubing (26) of the dielectric core (28) by crimping it to the dielectric core (28) between the helically wound convolutions of the outer conductor (30, 32, 34, 36).

Abstract: A floatable flexible line is provided with at least four air chambers which extend in the form of a one-piece extruded flexible chambered casing around the conductors. The density of the material for the chambered casing is preferably below 1 kg/dm.sup.3.

Abstract: A gas insulated transmission line has an inner conductor supported by insulators including a fixed insulator and a movable insulator with each having recesses in their outer portion having recessed metallic inserts therein of like configuration. The fixed insulator has disposed within the insert a base of an interconnection strap that extends along the sheath and is welded thereto. An insulating standoff button is further provided on the exterior of the base of the interconnection strap and presses against the outer sheath. An insert of the movable insulator contains a roller assembly. Preferably the roller assembly includes a substantially cylindrical roller of a semi-rigid insulating material that has edges bearing against the outer sheath and conforming to the configuration of the outer sheath by reason of deformation under load.

Abstract: A high speed electrical transmission line is provided comprising a signal conductor having an open cell, continuously porous, polymeric insulating material surrounding the conductor, the insulating material having a plurality of openings fused therein, the walls of the openings being solid, fused polymer which provide compressive strength for the otherwise highly compressible porous insulating material. The preferred polymer is expanded, porous polytetrafluoroethylene. The openings may be formed by a laser or by other means.

Abstract: A gas insulated electrical apparatus comprising a hermetic sheath filled with an electrically insulating gas having a plurality of electrically conductive sheath sections including hermetically fastened flanged ends. A high voltage conductor is electrically insulatably supported within the sheath by an electrically insulating spacer which is hermetically and securely held at its outer periphery between the flanged ends of the sheath sections. An electrically conductive trap ring is inserted between at least one of the flanged ends of the sheath sections and the outer periphery of the spacer. The trap ring defines, between the trap ring and the spacer, a low electric field particle trap in which a low electric field is formed and in which electrically conductive particles can be trapped and retained.

Abstract: An insulator for supporting the inner conductor of a gas insulated transmission line is configured so that its outer extremity is a simple blunt portion that fits loosely within a bearing block of insulating material of lower dielectric constant than the insulator itself so as to provide structural simplicity and improved performance through lessened breakdown susceptibility. A cylindrical particle trap ring formed of flexible metal sheet material is attached to the bearing block at locations spaced from the insulator.

Abstract: A high voltage flexible cable for pressurized gas insulated transmission line service has a continuous gas-tight cylindrical metallic conductive sheath corrugated circumferentially throughout its length. An elongated coextensive conductor member having an outer surface corrugated circumferentially throughout its length is disposed within the metallic sheath and separated from the sheath by a plurality of tubular elements of electrically insulating material disposed lengthwise of the cable in a transversely packed circumferential array around the conductor member between the sheath and the conductor member.