Abstract: A self-aligning shield splitter assembly (10) for splitting and shielding a wiring bundle (16) from an electromagnetic field and a method of assembling the same are provided. The shield splitter assembly (10) includes a first (12) and a second (14) hollow shield splitter. Each of the splitters (12, 14) defining an internal volume (36) for receiving a portion (54, 56) of the wiring bundle (16). Each of the splitters (12, 14) further includes open ends (32, 34) and a plurality of ridges (42, 44, 46) disposed along an exterior portion of the splitter (12, 14). The plurality of ridges (42, 44, 46) are perpendicular to a longitudinal axis of the splitter (12, 14). A plurality of braided shields (20, 22, 24) is provided individually surrounding the first splitter (12), the second splitter (14), and the wiring bundle (16). The plurality of braided shields (20, 22, 24) minimizes penetration of electromagnetic fields into the wiring bundle (16).

Abstract: A method of making a flexible coaxial cable is provided. The method comprises advancing a cable core comprising a conductor and an expanded foam dielectric surrounding the conductor along a predetermined path of travel, directing an elongate strip of copper onto the advancing cable core and bending the copper strip into a generally cylindrical form so as to loosely encircle the core. Opposing longitudinal edges of the thus formed copper strip are then moved into abutting relation and a longitudinal weld is formed joining the abutting edges to thereby form an electrically and mechanically continuous tubular copper sheath loosely surrounding the cable core. The cable core and the surrounding sheath are simultaneously advanced while the tubular sheath is deformed into an oval configuration loosely surrounding the core. The longitudinal weld of the advancing sheath is then directed against a scarfing blade and weld flash from the sheath is scarfed from the sheath.

Abstract: A radiation-hardened cable which has a central conductor and a first trap-electron reducer surrounding the central conductor. The first trapped electron reducer is an aluminum layer on a dielectric film whereby the aluminum layer is in electrical contact with the central conductor. A dielectric insulator surrounds the first trapped-electron reducer and a second trapped-electron reducer surrounds the dielectric insulator. The second trapped-electron reducer is an aluminum layer on a dielectric film which is in electrical contact with the dielectric insulator. A metal shield surrounds the second trapped-electron reducer and is in electrical contact with the aluminum layer of the second trapped-electron reducer.

Abstract: A corrugated tube has alternating ridge and trough shapes, viewed in longitudinal cross-section. The tube also has a slit along its longitudinal direction, thereby forming first and second portions flanking the slit. The first and second zones comprise a first and a second end portion of the ridge shapes, respectively. The first end portion forms a convex portion, while the second end portion forms a sequential convex and concave portion. Each portion extends from the slit side around the opposing circumferential directions, thereby forming female and male locking portions, respectively. When the male locking portions are inserted under the female locking portions, the convex portion of the first zone and the sequential convex and concave portion of the second zone are stacked and the slit is firmly locked.

Abstract: A corrugated tube with a longitudinal slit is loaded with electrical wires and the slit is locked. This process is effected using one device and in a single step. The corrugated tube is provided on its outer surface with circular peaks and troughs alternating along the axial direction. The portions facing one another across the slit are provided with convex and concave shapes along the circumference of the tube forming female and male locking portions. The male locking portion is inserted under the female locking portion, so as to lock the slit. An automatic locking device has a tubular guiding unit having a slanted tube part, and a tubular locking unit. The wires pass through the slanted tube part and the tubular locking unit. The tubular guiding unit is inserted into the slit, and the corrugated tube inside the tubular locking unit.

Abstract: A high speed data transmission cable comprises a pair of primary cables positioned adjacent to each other along their lengths with each primary cable including a pair of generally parallel conductors coupled together and surrounded by insulation. A shield layer surrounds each primary cable along its length to isolate the primary cables from each other. The primary cables and corresponding shield layers are twisted together around a center axis and form a double helical structure, thereby providing improved transmission characteristics in the high speed data transmission cable.

Abstract: A heat-shrinkable electromagnetic interference (EMI) shielding jacket sheathable over a generally elongate object of a given outer diameter extent. The jacket is formed of a tubular outer member of an indefinite length and an expanded inner diameter which is greater than the outer diameter of the object, an electrically-conductive inner member received coaxially within the outer member and extending coextensive therewith, and a generally continuous, thermoplastic interlayer interposed between the outer and inner members and extending coextensive therewith. The interlayer bonds the inner member to the outer member along substantially the entire length thereof for consolidating the jacket into an integral structure. The outer member, in turn, is heat-shrinkable to a recovered, i.e., contracted inner diameter smaller than the expanded inner diameter for substantially conforming the jacket to the outer diametric extent of the object.

Abstract: A metal probe sheath includes an end piece at one end of a tubular body thereof, a neck on the middle of the end piece to which the bare conductor of a lead wire is connected, a plurality of annular grooves around the neck to which the bare conductor of the lead wire is fastened, and two stop portions at two opposite ends of the neck to stop the lead wire in place.

Abstract: An IEEE 1394 cable includes two individually shielded twisted data pairs of wires, carrying differential signals TPA and TPB, and two power conductors, carrying power signals VP and VG. The two twisted data pairs of wires are each individually shielded by a braided shield. The cable also includes an overall braided shield and a no smoke, no halogen, flame retardant jacket. Preferably, the cable has a length of 4.5 meters and includes 26 gauge wire for the two twisted data pairs. Longer, alternate embodiments of the cable incorporate heavier gauge wire for the two twisted data pairs. Preferably, the gauge wire used for the two power conductors is constant for the different lengths of cable. An active disconnect is used to provide an active repeater between IEEE 1394 cables. The active disconnect provides ports, into which cables are connected, and a physical connection including electronics necessary to form an active node on the IEEE 1394 serial bus.

Abstract: Conductors are placed in insulator which acts as a spacer/centralizer for the conductors, which are in turn mounted within tubing. The void spaces between the insulator and the tubing inside wall can be filled with a sealing material. Alternatively, the voids around the substantially centralized conductors can be used as flow channels for the transmission of fluid pressure to a remote location, such as downhole. The conductors are protected because they are kept away from the tubing wall and can be further protected by the addition of the sealing material.

Abstract: A cable for recording conditions in a well bore, the cable including a tube having a generally smooth outer surface and an inner surface defining an elongated, uninterrupted opening extending throughout the length of the tube, at least one fiber optic, disposed within the opening of the tube, the fiber optic extending the length of the tube, an electrical conductor disposed within the opening of the tube, the electrical conductor extending the length of the tube, and insulating material disposed within the tube, the insulating material encapsulating the fiber optic and electrical conductor so as to form a core, wherein the core is of substantially smaller diameter than the opening to permit thermal expansion of the fiber optic, the conductor and the insulating material. The size of the tube and the core may be selected such that there is an annulus between the inside surface of the tube and the outside surface of the core, the annulus providing a flowpath extending the length of the tube.

Abstract: A vehicle detector for installation on the surface of a multi-lane road, comprising at least a coaxial detector cable provided with a central conductor, a metallic cladding and a filler material between the cladding and the conductor. The coaxial detector cable comprises at least one region which is referred to as the active region and in which the filler material is mechanoelectric, and also comprises at least one adjoining region which is referred to as a neutral region and in which the filler material is neither mechanoelectric nor potentially mechanoelectric.

Abstract: A metal sheath for surrounding a cable core consists of at least one shell part which is formed from a spring-hard steel strip. The shell part is formed by a method of bending a spring-hard steel strip into a shell having a transverse cross-section of at least a semi-circle so that after release, the shell springs back to the desired diameter for receiving the cable core.

Abstract: Continuous, elongated nickel plated graphite fibers are bound with an epoxy and are formed into a structural shape (11). An area (13) of the epoxy is removed by bead blasting to expose a layer of the plated graphite fibers (14), which are aligned in the desired direction of radio frequency current propagation. The bead blasted area (13) is then silver plated to obtain good contact to the plated graphite fibers (14) and resultant high conductivity from the structural shape (11).

Abstract: An electrical cable with, multiple conductors, a dense braid encircling the conductors, a sealant sheath encircling the dense braid, an open braid encircling the sealant sheath, and a sealant layer covering the open braid and entering interstices in the open braid to bond to the sealant sheath.

Abstract: In order to insure a constantly superior shielding effect for a high-frequency cable over a broad frequency range, the shield consists of a metal foil (3) which is shaped to form a tube and extends axially parallel as well as a number of electrically conductive wires (4) which are connected electrically with the foil (4) and in essence also extend axially parallel. A high-frequency cable constructed in this fashion is protected from interference over a broad frequency range and has a high tolerance against electromagnetic interference. A HF line of this type is particularly suitable as an antenna line, in particular in motor vehicles.

Abstract: A high energy coaxial cable is disclosed which is flexible to the extent of allowing a bend radius as short as 11 1/2 inches. The cable will conduct up to 500 kiloamperes and is reinforced to resist the high magnetic forces within the cable caused by the high current conducted. The cable is therefore useful in coupling high current between parts which experience relative movement such as a stationary power supply and a recoiling gun breech.

Abstract: A high-voltage lead intended for use in ignition systems of engines, typically large engines, the lead having an inner insulated conductor surrounded either by an inner conductive sleeve and an outer insulating sleeve, or by a single insulating sleeve with a conductive layer on its inner surface. The conductive sleeve or conductive layer, which is preferably non-metallic, provides shielding but permits the use of conventional pickup devices to detect electrical pulses in the lead and thereby monitor engine performance with the use of a timing light, oscilloscope or similar device. The presence of two insulating layers provides a desired measure of safety in the presence of an explosive gas and air mixture. The conductive layer provides both shielding and static electricity discharge. The structure of the invention is less expensive than ignition leads with conventional braided stainless steel shielding, and requires less effort and cost to maintain in safe condition.

Abstract: A composite conductor having improved high frequency signal transmission characteristics is provided which includes a conductive base and a conductive coating.

Abstract: A quad or dual differential pair cable for bi-directional high speed differential signal transmission has a first differential pair of conductors and a second differential pair of conductors. The conductors extend in substantially parallel relation to one another and are electrically insulated from each other by an insulating dielectric. The dielectric and the conductors are surrounded by a conductive metal shield. The dielectric insulates the conductors both from each other and from the shield and is sufficiently crush resistant to maintain the conductors in substantially parallel relation to one another over the length of the cable, The shield may be covered with an optional jacket. Each wire of a differential pair of wires are oriented 180 degrees apart from one another. The distance between any one of the conductors and the shield is equal to or greater than the distance between that conductor and a center axis of the cable.

Abstract: The present invention is an improved cable for use in accurate signal transmission where limited space may be available for cable termination to a backplane or other interface. The cable of the present invention employs highly effective insulation materials of whatever diameter may be required along the majority of its length, but reduces the diameter of such materials at connective ends of the cable. As a result, very accurate, high speed signal transmission is provided while allowing high density cable attachment at input/output ports. Further, the present invention provides an improved method for rapidly and accurately constructing a cable with changed diameter along its length.

Abstract: Continuous, elongated nickel plated graphite fibers are bound with an epoxy and are formed into a structural shape (11). An area (13) of the epoxy is removed by bead blasting to expose a layer of the plated graphite fibers (14), which are aligned in the desired direction of radio frequency current propagation. The bead blasted area (13) is then silver plated to obtain good contact to the plated graphite fibers (14) and resultant high conductivity from the structural shape (11).

Abstract: An electrical heating conductor having a resistance wire core and a high temperature-resisting, electrical insulation layer on top of the core, further having a multi-wire layer as a protective conductor, is improved by a layer of a wrapped foil made of a mechanically high strength material such as a polyimid or a polyether ketone or a derivative of either, and wrapped underneath or above the protective layer in order to protect the insulation layer against impacts and squeezing; the foil may be covered with a fluoropolymer coating for chemical protection; the multi wire layer includes a threaded-through high strength thread to hold the foil against the insulation underneath.

Abstract: A wide-band high frequency compatible electrical coaxial cable is provided with an outer conductor, a dielectric, and an inner conductor that is arranged about a plastic core and includes an inner layer of film that is surrounded by and in electrical contact with a plurality of twisted round conductors.

Abstract: A cable is provided that is suitable for Kelvin connection and a measuring system for using the cable. The cable comprises a central conductor for current supply to an object to be measured, a voltage detection conductor insulated and located close to the central conductor, a tubular guarding conductor surrounding the above two conductors covered by insulating material and a tubular conductor for a reference potential surrounding the above-mentioned conductors (as covered by an insulating material).

Abstract: A twin axial or parallel pair cable for high data rate differential signal transmission with extremely low skew. The cable has first and second plated electrical conductors which extend in substantially parallel relation to one another. Preferably the conductors are surrounded by first and second foamed fluoropolymer insulating dielectrics, respectively. The dielectrics and the conductors are surrounded by a braided metal shield of plated electrical conductors. The dielectrics insulate the conductors from each other and from the shield, and are sufficiently crush resistant to maintain the conductors in substantially parallel relation to one another over the length of the cable. The shield may be covered with an optional jacket.

Abstract: An electrical cable comprises one or more insulated elongate electrical conductors (1,2), a metal electrical shield 5 surrounding the conductors and a pull-thread 7 that extends along the cable under the shield so that the shield can be cut longitudinally by pulling the thread.The cable can be stripped of shield and jacket simply by pulling the thread and then tearing the end of the shield and jacket off. If desired a second conventional pull thread may be located between the shield and jacket in order to allow the jacket to be removed and the shield exposed.

Abstract: An improved low noise electrical signal transmission cable is disclosed. The cable employs an insulative layer of expanded polytetrafluoroethylene (PTFE) which is bonded in fixed relative position with a surrounding shield layer through use of an adhesive, such as fluorinated ethylenepropylene (FEP) or perfluoroalkoxy polymer (PFA). The bonding process reduces the separation of layers which can sometimes occur with expanded PTFE insulative cables and avoids the generation of unwanted triboelectric signals that can result from such separation.

Abstract: A marine tow cable has both coaxial electronic and fiber optic data transsion capabilities wherein the coaxial core conductors are positioned at the neutral axis or center line of the cable with the coaxial shield conductor circumscribing a dielectric material therebetween. Embedded within the dielectric material matrix, separating the core conductors and the shield conductor, are fiber optic transmitters helically circumscribing the core conductors. Surrounding the electro-optical assembly is a watertight jacket and a protective armor cover to carry the tensile forces imparted to the cable during towing operations.

Abstract: The coaxial cable of the present invention is an insulating layer, an outer conducting layer and a protective film layer formed in that order around a center conductor, the outer conducting layer being formed from a primary transverse winding and a secondary transverse winding, each of a plurality of thin metal wires, the winding directions of the transverse windings being opposite each other. The winding angle of the primary and secondary transverse windings with respect to the center conductor is 30.degree..+-.5.degree. and the winding pitches of the primary and secondary transverse windings are from 0.8 to 2.0 times the bending radius of the coaxial cable.

Abstract: A shielded coaxial electrical cable for transmission of electrical signals in which very fine wires or light-weight foils are used as shielding materials. The shielding materials are held in place by an adhesive to prevent dislodgement or misalignment of the shielding materials by forces exerted upon them during subsequent manufacturing steps.

Abstract: A power cable for use in high moisture and chemically corrosive environments has a longitudinally-folded sheath for encapsulating one or more electrical conductors. A plurality of overlapping folds at the longitudinal edges of the sheathing material creates a labyrinth-type sealing joint for maintaining moisture and gas integrity of the cable. A sealant is provided within the circumferential and radial spaces defined by the overlapping folds of the joint.

Abstract: An electrical cable and a method for manufacturing the electrical cable are provided in which a plurality of insulated conductors have a protective jacket extruded thereabout, the protective jacket having an exterior ribbed surface which includes a plurality of longitudinally extending ribs between which extend a plurality of thermal expansion voids. The protective jacket is formed from a thermally set elastomeric material which is partially cured, and then a protective exterior armor is helically wrapped around the exteriorly ribbed surface of the elastomeric, protective jacket. Then, the electric cable is heated to an elevated temperature for a period of time which is sufficient for fully curing the elastomeric protective jacket formed therein.

Abstract: An electrical cable for use in submersible well pumps in oil and gas well environments is provided having an electrical conductor core which is surrounded by an insulating layer of cross-linked polyethylene. A barrier layer surrounds the cross-linked polyethylene insulating layer. The barrier layer is impermeable to oil and other liquid hydrocarbons, but is permeable to low molecular gases. The barrier layer is preferably formed from a fluoropolymer and is surrounded by a polymeric protective layer. An adhesive layer attaches the barrier layer to the insulating layer.

Abstract: A transmission cable for transmitting differential logic signals is disclosed having an improved shielding. The cable includes a pair of insulated signal conductors in side by side relation with a layer of electrically conductive material wrapped around the two signal conductors. A non-insulated drain wire is disposed axially along the outside of the wrap of shielding material adjacent one of the signal conductors. The layer of conductive material is continued around the outside of the drain wire thereby forming an additional wrap of the shielding about at least a part of the cable assembly. The drain wire is in electrical engagement with the shielding material.

Abstract: An electrical cable for a submersible well pump is provided which is resistant to attack by hydrogen sulfide and which is less susceptible to damage from expanding gases during decompression. The electrical cable has a central copper conductor core. The conductor core is surrounded by a layer of electrical insulation material of either thermosetting or thermoplastic material. Surrounding the insulation material is a polymeric, low permeable layer having a hydrogen sulfide permeability rate which is substantially lower than the insulation material. A metal tape layer, such as lead tape, surrounds the low permeable layer. One or more conductor cores together with the insulation, low permeable layer and metal tape layer can be embedded in an elastomeric jacket and provided with an outer metal armor to provide a single electrical cable.

Abstract: The present invention relates to a cable used to supply electric power to a pump for pumping crude oil from an oil well. It is consisted of an insulating layer, a resin sheath and a metallic sheath sequentially layered onto the surface of a conductor. A protective layer comprised by a wrapping of thermal resistant tape is formed at the surface of at least one of the insulating layer and the resin sheath. Due to the provision of this protective layer, it is possible to prevent the breakdown of the insulating layer and the formation of holes in the cable caused by pressure changes occurring when the cable is removed from an oil well within the high pressure environment.

Abstract: Audio signal cable for interconnecting a power source and a load, e.g. a power amplifier and a loudspeaker, wherein the geometry of the conductors and the dielectric which separates them has been adapted to raise the capacitance and lower the inductance of the cable, therewith lowering its characteristic impedance to the same order as that of the load, typically 2-10 ohms. In a preferred embodiment this is done by providing a positive and a negative conductor each composed of a solid band of e.g. copper, substantially as wide as the cable which are sandwiched together with a thin interlayer of a dielectric material, e.g. polyester film.

Abstract: A light-weight, but strong and cut-through resistant electrical insulation tape, which is a laminate of porous polytetrafluoroethylene and polyetheretherketone. Also described are insulated wires and coaxial cables using the electrical insulation tape.

Abstract: In known cables, the cable core is surrounded by a metallic inner layer of a sheath, and the inner layer is enclosed by a corrugated metallic outer layer of the sheath. In these cables, a high resistance against corrosion and high temperatures at a good shielding of the electric conductors is not ensured.The new cable (1) including the inner sheath layer (19) which is made of at least one flexible copper band (11) and defined by an electromagnetic shielding with a shielding attenuation from 80 to 115 dB, with the shield attenuation in this range being dependent from the wall thickness of the inner layer and rising monotonously with increasing wall thickness, and the outer sheath layer (27) which is made of a steel band and increases the high temperature resistance of the cable 1, has the advantages of a good temperature resistance even at high ambient temperatures, like e.g. in case of fire, and a high resistance with regard to corrosion.

Abstract: A coaxial cable (10) is for use in a power distribution network (N). The cable connects a surge protective device (SPD) in parallel with feeder lines (W1, W2) of the network. The SPD senses voltage surges on the feeder lines and clamps the voltages to a level at which loads (LD) connected downstream of the SPD are protected from excessive voltage levels. An inner conductor (12) and an outer conductor (14) have a dielectric material (16) separating them. The inner conductor is a round conductor, and the outer conductor forms a hollow cylinder in which the inner conductor and insulation material fit. A ratio of the inner diameter (D) of the outer conductor to the diameter (d) of the inner conductor is approximately 1.05. Thus, the diameter of the inner conductor is relatively large compared with the inner diameter of the outer conductor. A relatively large diameter of the inner conductor serves to minimize the dc resistance of the cable. Also, the dielectric material has a permittivity in the range of 2.0-4.0.

Abstract: A cable for a submersible pump has three insulated power conductors assembled in a flat configuration. The power conductors are wrapped with an inner armor such as a metal strip. An auxiliary line is placed alongside the inner armor and wrapped in an outer armor. The outer armor is also a metal strip.

Abstract: An annular conductor consists of a central core (dielectric), circumscribed by a tubular helically wound braid of sets of pairs of strands (insulated or uninsulated), with an electrically insulating protective covering around the braid, and an outermost aluminum foil wrapping circumscribing the protective covering.

Abstract: Insulatedly coated wires (10) each coated with a metal foil of good electric conductivity and a metal foil of high magnetic permeability to form an electrostatic shielding layer (20) and a magnetic shielding layer (30), are bundled and are connected at their opposite ends to connectors. Each wire is adapted to be shielded with the metal foils in place of the conventional braided tube, thereby providing an easy-to-manufacture wire harness having good shielding effects adjacent the connectors.

Abstract: A high impedance cable includes a first layer of insulation surrounding a series of conductors to form a conventional ribbon cable and a second layer of insulation which conforms to the first layer of insulation and is retained in contact with the first layer of insulation in a manner which substantially excludes air from between the two layers of insulation but permits the second layer of insulation to be stripped from the ribbon cable for convention mass termination of the ribbon cable.

Abstract: A waterproofed, insulated conductor or cable and a method of fabricating the same using a new slushing compound is described. The waterproofed insulated conductor or cable includes a core with at least one conductor element, a polymeric insulation jacket, at least one textile covering over the polymeric jacket, and at least one waterproof coating on top of said at least one textile covering, the waterproof coating comprising a blend of from 15 to 40, preferably 20, weight percent of pine tar oil, the remainder being essentially natural (Trinidad) asphalt. The invention is especially suitable for fabricating armored cables in which armor wires, deposited on a textile yarn bedding, are embedded in a coating of the blend and further are covered by at least one textile yarn roving and a waterproof coating on top of each of said at least one waterproof coating.

Abstract: Ribbon cables have lower capacitance, higher impedance, and faster propagation velocities with microporous fibril thermoplastic dielectric insulation, because they have great amounts of air adjacent to the conductors and the improved electrical performance is due in part to the improved crush resistance. Crystallizable thermoplastic polymers having good fibril structure and crush resistance include polyolefins such as polypropylene and polymethylpentene. A layer of metal adhered to the dielectric insulation provides improved transmission line properties.

Abstract: Commercially available coaxial cables have been used successfully in single shot electromagnetic launcher and other pulsed power applications. The use of a coaxial cable interface between power source and pulsed power load reduces external magnetic fields and also aids in standardizing the interface, enhancing inter-changeability between a variety of power supplies and loads. As pulsed power systems continue to become more energetic and as the importance of repetitive operation increases, the use of commercially available cables becomes impractical because of the large number required for appropriate energy transfer. The cable according to the invention overcomes many problems encountered in the use of conventional cables. It incorporates a large area, flexible conductor in both the current feed and current return path, and matches these conductor cross-sections to provide uniform current paths.

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: An .?.angularly adjustable.!. angularly adjustable electrical conduit fitting includes an articulate metal conduit bendable at least 90 degrees about an arc having an inside radius of curvature not exceeding 12 inches, the conduit .?.in its preferred from.!. being between 193/4 and 203/4 inches long in a contracted state and being extendable by between 21% and 23% of its contracted length and having at one end a conduit coupling and at its opposite end a conduit or wall opening connector.