Abstract: A flat coaxial cable assembly comprising a plurality of parallel coaxial cables disposed in coplanar configuration, each cable being self-contained and with a center conductor, dielectric material around the conductor and a shield of conductive material around the dielectric material, a plurality of drain wires disposed between alternate pairs of adjacent coaxial cables, the drain wires having conductive contact with the shields of the pair of adjacent cables, and a sheath of insulating material encasing the cables and the drain wires with portions thereof on opposite sides of the cables bonded together by way of the spaces between the cables where the drain wires are omitted and at the sides of the outermost cables.

Abstract: A liquid leak detecting device is provided comprising at least two electrical conductors arranged in parallel and separated from each other by a material comprised of continuously porous polytetrafluoroethylene containing an electroconductive material within its pores.

Abstract: Improved lead wires for use with a stereo record playback system where at least a pair of left channel wires and at least a pair of right channel wires extend from a pick-up device through a tone arm to a stereo amplifier, the lead wires including a ground wire and the left and right channel wires, the ground wire being disposed between the left channel wires and the right channel wires to provide electrical isolation therebetween and the ground wire and left and right channel wires being bonded together as a single unit so that the electrical isolation is implemented within the tone arm without the addition of undue weight to the arm. The right channel wires may be twisted together as may the left channel wires. The ground wire and left and right ground wires may all be separated and unbonded from one another at least at the area of the pivot of the tone arm to facilitate rotation thereof.

Abstract: A cable for low-level signal transmission which exhibits reduced cross-talk interference. The cable consists of a four-conductor spiral quad of two opposed insulated signal wires and two non-insulated ground wires. Each of the wires may be stranded.

Abstract: A multi-conductor flat transmission cable which includes a plurality of parallel signal conductors each of which is insulated with a low loss, high velocity of propagation material. The insulations surrounding a send and return conductor pair are joined by a homogeneous integrally formed EMF window web formed of the same material as the insulations. The thickness and length of the window webs are selected to control the electromagnetic interference between the conductor pair, as well as the impedance and capacitance. Individual, uninsulated screen conductors may be positioned between adjacent signal conductor pairs to further minimize EMF interference. The insulated signal conductors, their EMF window webs, and the uninsulated screen conductors are encapsulated by an upper and lower outer layer of insulation formed of a material having a velocity of propagation different from the signal conductor's insulations.

Abstract: An electrical cable of the self-floating type for use in marine environments is provided with elements for taking up mechanical tractive forces. The electrical conductors of the cable are surrounded by an inner friction layer with a low friction coefficient. Around this layer a force equalizing layer of metallic material is provided and this layer is surrounded by a tube of plastic material showing a number of circumferentially situated grooves. An outer friction layer of the same material as the inner friction layer surrounds the hollow strands and the whole system together with the elements for taking up the tractive forces is embedded by a cable mantle of rubber-like plastic material.

Abstract: An electrical cable of the self-floating type for use in marine environments is provided with elements for taking up mechanical tractive forces. The electrical conductors of the cable are surrounded by an inner friction layer with a low friction coefficient. Around this layer a force equalizing layer of metallic material is provided and this layer is surrounded by hollow strands of soft plastic material. An outer friction layer of the same material as the inner friction layer surrounds the hollow strands and the whole system together with the elements for taking up the tractive forces is embedded in a cable mantle of rubber-like plastic material.

Abstract: A screen for electric power cables comprising a metal tape with a coating on one side of a thermoplastic with parallel metal wires extending longitudinally of the tape and along non-rectilinear paths partially embedded in the coating and preferably contacting the tape. The tape may also be coated with a plastic on the opposite side with a plastic which will provide good adherence to an insulating sheath. Also, a cable including such screen around the conductor thereof and the insulation on the conductor, and a method for making the screen which comprises heating a so-coated tape, applying the wires to the heated coating in non-rectilinear, parallel paths, pressing the wires into the coating and allowing the latter to cool.

Abstract: In a cable for conveying information signals of selected frequencies and simultaneously conveying a selected amount of electric power, a central conducting means is surrounded by a dielectric material. An outer conducting means is positioned around the dielectric, and cooperates with the central conducting means to provide a first path, through which the information signals are conveyed, and one of the conducting means provides a second path, through which the electric power is conveyed.

Abstract: This inside wiring cable has insulated conductors surrounded by one or more layers of heat-resistant tape covered by a protective metal sheath which is preferably made of longitudinally folded metal strip with the seam welded and the tube metal then reduced in diameter down into intimate contact with the core and annealed. The cable is fire-resistant so that it does not spread fire. The metal sheath prevents any "afterburn.

Abstract: 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 braided metal armour. The structure has an outer sheathing of chlorine sulphonated polyethylene or ethylene propylene rubber. Used as a three-conductor power cable the conductors are twisted together inside the layer of thermoplastic elastomer.

Abstract: A remote control cable comprises two conducting wires separated by a central element with reinforcing wires parallel to the conducting wires. At least one layer of lapping covers these elements and at least one external coating layer is applied. The central element separates and holds the conducting wires parallel and is in the form of a continuous element, comprising two longitudinal recesses arranged symmetrically relative to a solid central portion. Each recess encloses a conductor over more than half of the periphery of the conductor. This cable may be used for the transmission of control command for moving bodies traveling at high speed.

Abstract: An ullage measuring device and an accurate method of using an ullage tape to find the surface of a liquid in a tank without visual sighting. The ullage device includes a composite tape formed of a tape from which readings of ullage may be obtained and electrical conductors to activate circuitry for rendering a crystal operative to transmit sonic energy to another crystal adapted to receive sonic energy and to activate one of the conductors to provide an audible indication at a point remote from the surface of the liquid when the effective end of the composite tape has reached the surface of the liquid.

Abstract: 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 together with the self-induced power current magnetic field creates a net helical magnetic field whose pitch is dependent upon the relative magnitudes of the azimuthal component of the self-induced magnetic field and the axial component of the applied magnetic field. The applied magnetic field may be achieved by a permanent field or by directing either an alternating current or direct current through a helical winding defining a solenoid coaxial with the transmission cable. Alternatively, the applied field may be achieved by surrounding the grounded sheath with oriented ferrite or other magnetic material in a suitable support medium such as a pliable plastic bond form to produce a multipole magnetic field.

Abstract: The apparatus includes a high frequency, high voltage generator, a therapeutic instrument for applying an electric current to a patient, a compound electrical power and control cable connected between the generator and the instrument, and a switch for selectively connecting at least one signal current conductor in the cable to a therapeutic current conductor in the cable to complete a circuit through an activating device for controlling the action of the generator. The cable includes a multiple strand bare therapeutic current conductor wire and preferably two single strand wires with film coatings of low voltage insulation, all of the wires being enclosed in a protective sheath of high voltage insulation. A high voltage is impressed on all of the wires but the voltage differential is very small so that the bare conductor is adequately insulated from the others by the film coatings, with a resulting savings in weight and cost of wire and insulation and improved flexibility.

Abstract: A flexible, high load bearing, electrically conductive buoyant tether cable includes a center stress core having a plurality of jacketed stress bearing members which are in turn enclosed within a plastic-like core jacket. Seven conductor elements are cabled around the core, including three pairs of conductor elements and a jacketed coaxial cable. Each of the conductor element pairs includes a core, five twisted pairs of individually insulated, electrically conductive wires cabled around the conductor element core and a conductor tape binder surrounding the cabled pairs of wires. The conductor elements are cabled around the center stress core and are themselves enclosed by an outer tape binder and jacket. A plurality of intersticial stress members occupies a portion of the corresponding interstices between the cabled conductor elements and the outer tape binder.

Abstract: A self-supporting cable, more particularly a vertical riser, borehole, dredger and mine shaft cable is disclosed. The self-supporting cable comprises a cable core, a jacket surrounding the cable core and having one or two diametrically opposed sections of increased thickness, and at least one supporting member totally embedded in each jacket section of increased thickness and disposed parallel to the longitudinal axis of the cable. The supporting member preferably consists of wire ropes made of plural elementary strands wound around a central strand, each strand comprising plural individual wires twisted together.

Abstract: An electrically insulated conductor adapted to be used at high temperatures in power plants, refineries and chemical process plants for connecting instruments has at least one pair of electrical conductors insulated with an irradiation cured ethylene-tetrafluoroethylene copolymer, ethylene-chlorotrifluoroethylene copolymer or polyvinyl chloride polymer and a drain wire enclosed in a metallic shield and an irradiation cured halosulfonated polyethylene, polychloroprene or chlorinated polyethylene jacket.

Abstract: A cable for dielectric optical waveguides has the dielectric optical waveguides arranged in segmented compartments. Tensile members are provided in the core of the cable and/or externally of the segmented compartments. This particular cable construction prevents the dielectric optical waveguides being subjected to excessive tensile stress.

Abstract: A cable for detecting, in a stable and waterproof way, any leak of petroleum, petroleum product, or other fluid from an underground pipeline by means of a change in the electrostatic capacity between inner and outer conductors of the cable due to permeation by the leaking fluid. The cable offers constant, uninterrupted monitoring of such a pipeline with no limit to the watching range, and can accurately locate even a minor leak. The invention also involves a method of installing a detection system using such a detector cable, and a detection method which depends on electric pulses as means for detecting such a leak.

Abstract: A logging system employs an armored multiconductor coaxial cable, including an inner conductor, a shield and conductive outer armor and in which the shield, encompassing the inner conductor, comprises a plurality of conductors which includes groups of conductors, each group being separated from another group by an insulator. A distribution circuit has capacitors connected between each shield conductor to improve transmission of a high frequency signal by the inner conductor and the shield conductors while low frequency signals and direct current voltages may be transmitted by the shield conductors and the conductive armor of the cable.A logging tool, including pulse neutron source, gamma ray detector and collar detector, is passed through a borehole traversing an earth formation. Data pulses corresponding in number and amplitude to detected gamma radiation are provided by the gamma ray detector to the inner conductor and to the plurality of conductors of the cable.

Abstract: 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 coated with semiconducting material, and which are arranged in a long helical wrapping around the coated insulation in relatively close spacing to each other. This structure, especially useful underground, provides very effective shielding and fault-current return paths, with a relatively inexpensive aluminum structure that is nevertheless protected from corrosion. There are also advantages of better mechanical protection and less likelihood of cable damage by differential temperature expansion effects.

Abstract: A tethered underwater work system comprises a primary lift module attached o a support vehicle by means of a primary tether. A submarine work vehicle is removably attached to said primary lift module and connected thereto by means of a secondary tether. Additionally, the lift module contains electrical distribution systems to permit an extensive control and instrumentation linkage with the submarine work vehicle and remotely controlled manipulators mounted thereon.

Abstract: An electromechanical cable is adapted for deployment along a generally straight path and when thus deployed to be substantially free of torsional reactions resulting from changes in tensile stress in the longitudinal direction of the cable. The cable includes a plurality of strain members arranged in an annular configuration. When the cable lies straight and untwisted the strain members are also straight, parallel to the longitudinal axis of the cable and parallel to each other. The strain members are loosely confined within the cable structure so that when the cable is subsequently twisted they are free to move into helical positions relative to the axis of the cable.The cable is first wound into a coil and concurrently pretwisted about its own axis by approximately 360.degree. for each loop of the coil. After being transported to the deployment site, the cable is pulled off the coil without relative rotation between the delivered end of the cable and the coil, so that the pretwist of the cable is relieved.

Abstract: A power cable comprising three insulated power conductors helically stranded together, at least two grounding conductors located in the outer interstices between the power conductors and an extensible ground check conductor also located in the interstices between the power conductors or at the center. The ground check conductor includes a plurality of metallic wire strands helically wound together in a short lay in the same direction of lay, and extensible non-metallic materials separating the metallic wire strands for substantially eliminating direct friction between the groups of metallic wire strands during flexing and twisting of the cable.

Abstract: An electrical cable of conventional or retractable helical coil form which is relatively small in diameter and sufficiently flexible to be used to advantage on a tractor-trailer to connect the power supply on the tractor with the electrical system carried by the trailer has a polymeric sheath, an insulated 10 gauge stranded conductor substantially coaxial with the sheath, four to six insulated stranded 12 gauge conductors substantially evenly spaced about the periphery of the 10 gauge conductor, a plurality of uninsulated stranded conductors of 14 gauge disposed between the smaller insulated conductors, filler material filling the spaces between the conductors and preferably a plastic film helically wound about the conductors. The 12 and 14 gauge conductors are helically wound about the 10 gauge conductor. The assembly of conductors, filler and plastic film combine to form a cable having a substantially circular cross-section and substantially fill the sheath.

Abstract: A welding cable is described in which a welding current conductor, switch wires and a gas conductor tube are all contained in longitudinal passages in a single cable jacket. The passages containing the gas conductor tube and the switch wires are accessible through longitudinal openings in the jacket coextensive with the passages to facilitate insertion and removal of the switch wires and the gas conductor tube.

Abstract: Nonmetallic-sheathed cable is insulated and jacketed with expanded polyvinyl chloride comprising 8-24%, by volume, of gas.