186results about "Quad constructions" patented technology

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.

A shielded electrical ribbon cable (2) includes conductor sets (4) each including one or more insulated conductors (6), and a first and second shielding film (8) on opposite sides of the cable. In transverse cross section, cover portions (7) of the shielding films (8) substantially surround each conductor set (4), and pinched portions (9) of the films (8) form pinched portions of the cable on each side of each conductor set (4). Dense packing is achieved while maintaining high frequency electrical isolation between conductor sets (4). When the cable (2) is laid flat, a quantity s / Dmin is in a range from 1.7 to 2, where S is a center-to-center spacing between nearest insulated conductors (6) of two adjacent conductor sets (4), and Dmin is the lesser of the outer dimensions of such nearest insulated conductors (6). Alternatively, a first and second conductor set each having only one pair of insulated conductors can satisfy a condition that Σ / σ1 is in a range from 2.5 to 3. Other shielded cables, systems, and methods, which may or may not utilize the dense packing, are also disclosed.

It is intended to provide a high-speed differential signal cable having a small diameter and high strength. A 4-conductor cable includes four insulation-coated insulated wires (center conductors) bundled together, and a wire mesh and an insulating sheath which cover a periphery thereof, and this cable is characterized in that a conductor size of center conductor wires is thinned so as to satisfy a specified value of attenuation with a cable length of 2.5 m, and also twisted pair wires are replaced by a quad-structure wire, so that the outer diameter is not larger than 3 mm.

There is disclosed an endoscopic instrument comprising a shaft having a distal end at which at least one optical sensor is arranged and a proximal end configured for a connection to a supply unit, further comprising a data transmission element which is provided between the at least one optical sensor and the proximal end and which is configured to differentially transmit at least two signals. The data transmission element is embodied as a star quad cable.

A telecommunications cable having a cable jacket defining an elongate cable core, a conductor assembly comprising four twisted pairs of conductors disposed along the core and parallel elongate distensions formed on an inner surface of the cable jacket. The distensions are spaced about an inner surface of the cable jacket and prevent the conductor assembly from coming into contact with the inner surface. The distensions can be the result of a series of filler elements placed between the cable jacket and the cable core and which wind helicoidally along and about the cable core. A separator spline has first and second elongate dividing strips having a substantially H shaped cross section and arranged side by side. The spline twists helicoidally along its length. The separator spline and the insulation surrounding the twisted pairs of conductors can be manufactured form a material having the same dielectric constant.

Various high speed shielded cables (7001) are used in combination with a connector assembly (7000). The connector assembly (7000) includes a plurality of electrical terminations (7004a) in electrical contact with the conductor sets (7005) of the cable (7001)at a first end (7007) of the cable (7001), the electrical terminations (7004a) configured to make electrical contact with corresponding mating electrical terminations of a mating connector and at least one housing (7002) configured to retain the plurality of electrical terminations (7004a) in a planar, spaced apart configuration.

A four-core cable of small diameter and high strength for high-speed differential signal, in which four insulated wires (center conductors) are bundled, the circumference thereof is covered by a metal net and an insulating housing. The size of the center conductor wire is reduced, a twisted pair wire is changed to a quad structural wire, and its outer diameter is set to be 3 mm or under so as to satisfy the specified value of attenuation with the cable length of 2.5 m.

The invention discloses an ultrahigh frequency digital communication cable. The cable comprises a cable core, a main shielding layer, an external protection layer and branch shielding layers on twisted pair wire groups; the overlapping sides of the branch shielding layers are clamped between two adjacent insulated single wires to form branch shielding overlapping wires; the branch shielding overlapping wires corresponding to two adjacent twisted pair wire groups are arranged in a staggered mode; the outwards stretching lengths of the overlapping outwards stretching sides of the branch shielding layers from the branch shielding overlapping wires are L1; and the outwards stretching lengths is 10 % -15 % of the widths of covering foil belts of the branch shielding layers. The preparation method of the invention comprises following steps: (1), drawing a copper conductor; (2), extruding an insulation layer; (3), twisting the twisted pair wire groups; (4), covering the branch shielding layers; (5), twisting into the cable; (6), weaving the main shielding layer; and (7), extruding the external protection layer to form the cable finished product. According to the cable and the method of the invention, the shielding effect is good; intrusion and leakage of electromagnetic waves are effectively prevented; the cable is firm in structure and stable in transmission performance and is especially applicable for transmitting ultrahigh frequency band digital signals.

An arrangement of at least two adjacently extending cables, of which a first cable and a second cable which each have at least one stranding group that has two or more conductors stranded to each other and which each have a common cable sheath surrounding the stranding group, a spacer being provided outside on at least one of the cable sheaths for increasing a minimum distance (A) between the stranding groups of the two cables.

An apparatus for communicating between a cab and a chassis of a truck comprises a multi-conductor cable having a plurality of circuits. The multi-conductor cable is of a length to extend substantially the length of the chassis, to carry various communication functions between the cab and a distal end of the chassis.

A communications cable comprises an elongate cable jacket having an internal cavity and a plurality of twisted pairs of insulated conductors disposed in the internal cavity of the cable jacket, each of the conductors being insulated with a polymeric layer. Each of the insulated conductors within each of the twisted pairs of conductors defines a twinning helix having a first rotative direction, and each of the twisted pairs defines a bunching helix having a second rotative direction, the second rotative direction being opposite that of the first rotative direction. In this configuration, the communications cable can provide acceptable crosstalk and attenuation performance, even with foamed insulators that have demonstrated unacceptable performance when twinned and bunched in the same rotative direction. <IMAGE>

An apparatus for reducing echoes which are generated due to signals induced to a handset connector in a telephone, includes a round-type handset connector cord arranged into a round configuration having a certain arrangement of the speech transmitting and receiving lines, and a connecting unit provided in the body of the telephone and having a differential amplifier for applying signals received to a transmitting unit by differentially amplifying the signals. Alternatively, the apparatus for reducing echoes includes a flat-type handset connector cord having the lines arranged in a certain order, and a connecting unit for connecting the speech transmitting and receiving lines in certain manner. Alternatively, the apparatus for reducing echoes and noises includes a flat-type handset connector cord having the lines arranged in a certain order, and a connecting unit connecting to the speech-transmitting lines and the speech-receiving lines in a certain manner.

A cable for transmitting electrical signals including an outer casing made of an electrically insulating material and at least N lines n with N≥2 and N€N which are arranged within the outer casing, wherein each line m has a total of M wires made of an electrically conductive material with M≥1 and M€N, wherein the wire m with m€[1, M], m€N, the line n with n E [1, N], n€N is surrounded by a dielectric having a predetermined value for the relative permittivity er(m,n)>1, wherein for each line n the value for the relative permittivity of the dielectrics (24. 26. 28. 30) of the wires (16, 18, 20, 22) of this line n is identical, except for deviations resulting from the manufacturing process, so that er(p·n)=er(p+q,n), where q€[1, M−p], q€Np € [1, M−1], p€N.

The invention discloses a special-purposed signal transmission cable for a data center. The cable comprises a cable core, an inner protective layer, a composite shielding layer and an outer protectivelayer, the cable core is formed by intertwisting four pairs of shielding wires, each shielding wire comprises conductor wires, an insulating layer and a sub shielding layer, the sub shielding layer is internally provided with a sheath, the sheath is internally provided with two conductor wires, the insulating layer is formed by a crosslinked polyethylene insulation unit, a small sheath and the outer protective layer are both made of low-smoke halogen free polyolefin, and the small sheath is additionally arranged between the insulating layer and the sub shielding layer. The cable pair is low in the working capacitance, the signal transmission requirement for the special-purposed signal transmission cable is reached, the sub shielding layer is formed by braiding copper wires, the insulatinglayer is made of a polyester band, each of first and second shielding layers is formed by braiding a plastic-aluminum band and a copper wire, the composite shielding layer is formed by braiding the plastic-aluminum band and copper wire to realize composite shielding, static interference of the external in the circuit is reduced greatly, and the shielding performance of the cable is improved.

The invention discloses a fire-resistant data cable, which comprises a cable inner core, an oil-resistant layer, a refractory fiber layer and a water-resistant layer, wherein the cable inner core, the oil-resistant layer, the refractory fiber layer and the water-resistant layer are sequentially arranged from the inside to the outside; the cable inner core comprises a foam skeleton and conductor core groups; the foam skeleton comprises four raised lines which are symmetrically arranged; the tail end of each raised line is provided with a groove which is sunk inwards; each conductor core group is arranged in the corresponding groove; each conductor core group comprises a pair of wires which is arranged in parallel; an isolation layer coats the outer sides of each pair of wires; factice is filled between the cable inner core and the oil-resistant layer; and the factice comprises dimethicone, copolymerized silicone oil and fumed silica with the ratio in parts of 54 to 38 to 8. Through the arrangement of cable inner core, oil-resistant layer, refractory fiber layer and water-resistant layer, the fire resistance and the vibration reducing performance of the fire-resistant data are improved; and the problem that the fire resistance and the mechanical property are relatively poor since an existing fire-resistant data cable is dependent on the performance of a resin material itself is solved.

The invention provides a novel data cable which is suitable for connecting a USB plug and a USB interface end. The novel data cable comprises a plurality of inner core wires, a ground wire, a double-sided aluminum foil layer and an outer layer, wherein the double-sided aluminum foil layer coats the inner core wires and the ground wire; the outer layer comprises a conductive adhesive layer and an outer wall layer; the conductive adhesive layer coats the outer surface of the double-sided aluminum foil layer; and the outer wall layer coats the outer surface of the conductive adhesive layer. A metal braid layer in a conventional cable does not need to serve as a shielding layer and is replaced with the conductive adhesive layer to realize a shielding effect.

The invention discloses a ratproof data cable. The ratproof data cable comprises a cable inner core, a fireproof layer and an insulating layer which are arranged from inside to outside in sequence, wherein the cable inner core comprises a foaming framework and a conductor core group; the foaming framework comprises four limiting convex strips; the conductor core group is mounted in a mounting cavity; the conductor core group comprises a pair of wires which are arranged side by side; the exterior of the pair of wires is coated with an insulating layer; the outline of the cross section of the insulating layer adopts a regular hexagon shape; the edge of the insulating layer is sprayed with a ratproof coating film; the formula of the ratproof coating film comprises capsicin; adhesion layers are arranged on all the six outer side faces of the insulating layer. By virtue of the cable inner core, the fireproof layer, the regular hexagonal insulating layer, and the ratproof coating film which is arranged on the edge of the insulating layer, the ratproof data cable has a good ratproof effect, low dosage of rodenticide, and low pollution to the environment; and meanwhile, the shortcomings of relatively high weight and high cost of the existing data cable which is armoured with metal on the surface for preventing rodents from biting the cable are solved.

The invention discloses a weather-resistant flexible data cable for communication. A first sheath layer of the flexible data cable wraps the outer surfaces of two copper conductors, and a second sheath layer wraps the outer surfaces of steel wires. The first sheath layer consists of a polyvinyl chloride layer located on the inner side and a thermoplastic polyurethane layer located on the outer side. The thermoplastic polyurethane layer consists of thermoplastic polyurethane elastomer 80-100 parts, low-density polyethylene 10-20 parts, ethylene acrylic ester 8-15 parts, ethylene-butylene copolymer 5-10 parts, silicon dioxide 4-8 parts, butyronitrile compound 8-20 parts, chlorinated polyethylene 5-10 parts, zinc stannate 5-15 parts, magnesium hydroxide 5-12 parts, compound molybdenum smoke suppression agent 2-8 parts, montmorillonite 1-5 parts, calcium-zinc compound stabilizer 1-3 parts, bi (3,5-tert-butyl-4-hydroxycyclohexyl phenyl ketone) thioether 1-3 parts and zinc stearate 2-4 parts. The weather resistance and flame retardant property of the weather-resistant flexible data cable for communication are improved, meanwhile a laying phenomenon is also avoided, the contact surface consistency and bonding fastness of the polyvinyl chloride layer and the thermoplastic polyurethane layer are improved, the performance reliability of a product is improved, and the service life of the product is prolonged.

The invention provides a high-flame-retardancy railway signal cable. The high-flame-retardancy railway signal cable comprises a cable core and a protection layer which wraps the cable core, wherein the cable core comprises at least one wire group; the wire group comprises four insulating single wires which are arranged in a twisted mode in four different colors; each insulating single wire is composed of a conductor, an inner insulating layer, an outer insulating layer, a high-flame-retardant wrapping tape layer and a comprehensive sheath; the periphery of the four insulating single wires belonging to the same wire group is wrapped by a binding yarn, an inner-side non-hygroscopic insulating layer, a first shielding layer and an outer-side non-hygroscopic insulating layer in sequence from inside to outside; and the protection layer comprises a cable core wrapping tape layer, a first buffer layer, a second shielding layer, a second buffer layer, a steel strip armor layer and an outer sheath which are sequentially arranged from inside to outside. The high-flame-retardancy railway signal cable has reliable service life, and excellent thermal stability, moisture resistance, flame retardancy and high temperature resistance and is capable of bearing large radiation dose.

The invention discloses a four-core coaxial cable for aerospace. The four-core coaxial cable comprises a cable core and a shielding layer; a strengthening core is arranged at the center of the cable core, the cable core is stranded through four coaxial wire cores and the strengthening core; each wire core is composed of a conductor wire and an insulating layer covered at the outside of the conductor wire; graphite conductive fabric is embedded at the periphery of the cable core, a the shielding layer is embedded at the outside of the graphite conductive fabric, and a jacket is extruded at theoutside of the shielding layer. The invention further provides a corresponding preparation method; the preparation method comprises the following steps: the graphite conductive cloth preparation: spraying super glue on a matrix cotton tape, grinding the raw material graphite into a piece, and rolling on a substrate, continuously rolling and tearing off the matrix cotton tape on the substrate, andfinally spreading the powered graphite, and rolling and molding; wire-wrapping process: wrapping the cable core by adopting the graphite conductive cloth, embedding the shielding layer and the jacketto obtain the finished product. Through the method for preparing graphene by simulating a mechanical method, the graphite is layered and adhered on the periphery of the cable core, the conductivity ofthe graphite conductive cloth is improved, the thickness of the graphite conductive cloth is reduced, and an electromagnetic shielding effect of the cable product is improved.

The invention discloses a high-reliability data cable having buffering performance. The data cable includes an insulating layer, a fireproofing separating layer, a thin aluminium powder layer, a metal protective layer, and a silicone rubber inner sheath that wrap from the outside to the inside, the outer wall of the insulating layer is outwardly connected with a wirerope protection layer through a connection part, a wire rope parallel to the insulating layer is inserted into the wirerope protection layer, a filler layer is arranged inside the silicone rubber inner sheath, the silicone rubber inner sheath is provided with four silicone rubber projections having the arc-shaped cross sections, each silicone rubber projection is internally provided with a buffering cavity, a clamp groove is arranged between adjacent silicone rubber projections, and a twisted pair simultaneously abutting against the filler layer is arranged in each clamp groove. The twisted pair is firmly fixed by the four silicone rubber projections along the inner surface of the silicone rubber inner sheath, so that the stability of the overall structure is improved; and the buffering cavities arranged in the silicone rubber projections enhance the buffering performance of the structure and reduce the impact of the external giant force on the twisted pair.

The invention discloses an anti-extrusion signal cable comprising a cable core, an internal protection layer, a shielding layer, an intermediate protection layer, a reinforcing layer, a protection layer and an external protection layer. The cable core comprises an insulator and multiple wire cores. The internal part of the insulator is provided with multiple first through holes and multiple second through holes along an axial direction. Each first through hole is surrounded by 3-6 second through holes. The multiple wire cores are respectively arranged in the multiple first through holes. Each wire core comprises a conductor, a polyester tape which wraps the conductor and a copper wire braiding layer which wraps the polyester tape. The internal part of the internal protection layer is provided with multiple third through holes along the axial direction. The internal part of the intermediate protection layer is provided with multiple fourth through holes along the axial direction. The signal cable has the properties of being waterproof and moisture-proof, flame-retardant and fireproof, anti-interference and anti-extrusion.

The invention discloses a novel computer cold-resistant cable, and the cable comprises a cable core, wherein the cable core is formed by the intertwisting of four pair-twisted insulating wire cores. Each pair-twisted insulating wire core consists of a pair of stranded conductors located at the center, a stranded wrapping belt and a split-phase copper wire braided shielding layer, wherein the stranded wrapping belt and the split-phase copper wire braided shielding layer sequentially wrap the stranded conductors. A gap of the cable core is provided with a heating belt in an extruded manner, and the cable core is wrapped by a rock wool thermal insulation layer. The exterior of the rock wool thermal insulation layer is wrapped by a rubber and plastic inner sheath in an extruded manner. The exterior of the rubber and plastic inner sheath is provided with a steel wire layer in a braided manner, and the exterior of the steel wire layer is wrapped by a carbon screw thread outer sheath in an extruded manner. The cable is good in conductivity, and is strong in tensile capability. The outer sheath is not liable to crack, and the service life is long.

The invention, which belongs to the technical field of a cable tool, especially relates to a hybrid photoelectric cable. The disclosed hybrid photoelectric cable is characterized in that the cable comprises a plurality of pairs of twisted-pair units, tightly packaged fibers, and a porous plastic filling rack. The twisted-pair units and the tightly packaged fibers are arranged in the porous plastic filling rack to form a main cable core; and the outside of the main cable core is extruded with a PVC or LSZH plastic sheath. According to the invention, the cable has the following beneficial effects: hybrid structures of different products are designed differently, so that the transmission efficiency is improved and the size of the overall hybrid cable is reduced; and the transmission bandwidth is increased and can reach 250 MHz and above.

The invention discloses a data cable with a multi-point fixing structure, which comprises: four sets of twisted pairs, a polyester tape layer, a braided copper wire mesh shielding layer, and a high-density polyethylene outer sheath; a single set of twisted pairs The outer periphery of the wire is covered with an aluminum foil layer, and the outer periphery of the aluminum foil layer is also covered with a polypropylene tape layer; the outer periphery of the high-density polyethylene outer sheath is fitted with a plurality of sleeves; each outer periphery of the sleeve is fitted with a A collar connected by pipe thread; a plurality of magnetic blocks are fixed on the outer peripheral surface of each collar, and the magnetic blocks fixed on the same collar are uniformly distributed along the circumferential direction of the collar. The invention is provided with a data cable with a multi-point fixing structure, which has a reasonable structure, good performance and is convenient for magnetic fixation.

The invention belongs to the technical field of communication cables, and relates to a high-strength digital communication cable. Two leads formed by wrapping solid copper conductors with polyethylene insulation layers are stranded to form a core wire group, 1-8 pairs of core wire groups are stranded and then lapped with wrapping tape layers to form a cable core with a circular cross section, gaps among the stranded core wire groups and the wrapping tape layers are filled with fillers, and a longitudinal wrapping layer, a braided shielding layer, an inner protective layer, an armor layer and an outer protective layer sequentially wrap the outside of the cable core from inside to outside to form the high-strength digital communication cable. Aramid fibers serve as the fillers, the 'S'-shaped steel screw interlocking armor layer is used, the composite outer protective layer comprises a polyurethane elastomer sheath, talcum powder and an irradiation crosslinking polyvinyl chloride sheath, so that the cable has high tensile strength, compressive capacity and good softening property, and high strength of the digital communication cable is realized. The high-strength digital communication cable is applicable to network cabling of protective environments which are easily trod and squeezed and free from pipelines, slots and the like.

The present invention relates to a communication cable capable of satisfying the communication cable standard of Cat. 6A or higher by minimizing interference between adjacent cables by a method of changing a structure of an external jacket without applying a metal shielding layer to cover each pair of wires or a whole cable core.