IPC classes for russian patent Symmetrical four-pair cable (RU 2358343):
Another patents in same IPC classes:
Sealed and balanced high-frequency cable / 2284594
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High-frequency balanced shielded cable / 2273904
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Vapor-tight cable for high-speed communications and its manufacturing process / 2262146
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Vapor-tight cable for high-speed communications and its manufacturing process / 2262146
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Sealed and balanced high-frequency cable / 2284594
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Symmetrical four-pair cable / 2358343
Invention relates to the field of electrical engineering and is to be utilised for design of symmetrical communication cables within a shared network or structured cable systems. Concept of the invention is as follows: the symmetrical four-pair cable consists of cores with membranous-and-porous film insulation twisted into pairs and into a general lay contained in an outer sheath of a polymer material; insulation of each core within the porous layer and the membranous layer contacting each core is perforated along the whole length within each layer at an independent pitch.
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Symmetrical fire-resistant cable / 2370839
Invention is related to cable technology, to symmetrical fire-resistant cables for transfer of high-frequency signals in communication systems, industrial automation and systems of fire protection alarms in nuclear power plants, in particular inside containment. Cable comprises at least one symmetrical pair of current-conducting strands insulated by fire-resistant organosilicic rubber and polyimide film, covering each of insulated strands, and separating them with single layer. At the same time film fixes insulated strands between each other, providing permanent symmetry of pair along cable length.
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Symmetric four-pair cable / 2424593
Symmetric four-pair cable includes cords in polymer insulation, which are twisted in pairs with various pitches, with outer polymer sheath; one of the pairs is central in polymer dividing band; three other pairs are twisted around it, each of which is separated with polymer element the dimensions of which are restricted with diameter of the pair, and separating polymer band is put on central pair so that edges are overlapped throughout the length.
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Symmetric unshielded category 5e 25-pair cable of bundled structure with improved characteristics / 2457562
Symmetric unshielded 25-pair cable of category 5e with improved characteristics contains strands in polymer insulation twisted into pairs to form a common core with one pair in the centre of the structure while the other 24 pairs separated into four bundles, six pairs in each; introduced into each bundle is a triradial polymer separation element between each two arms whereof two pairs are positioned twisted together at pitches different from those of each of the two other pairs between other two arms; each bundle is enwrapped into a polymer perforated tape with edge overlapping along the whole cable length; all the four bundles are twisted together round the one central pair.
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Symmetric unshielded 25-pair cable of category 5e with improved characteristics / 2457563
Symmetric unshielded 25-pair cable of category 5e with improved characteristics contains strands in polymer insulation twisted into pairs to form a common core in lays as follows: three twisted pairs in the first lay, nine twisted pairs in the second lay and thirteen twisted pairs in the third pay in common polymer sheathing; each pair in the cable is twisted at a pitch different from that of the other pairs; in the first lay the pitch consists of three pairs with a triradial polymer separation element introduced separating the pairs of first lay from each other; between the first and the second lays a separation polymer tape is introduced with edge overlapping along the whole of the cable length; equally, between the second and the third lays a separation polymer tape is introduced with edge overlapping along the whole of the cable length; in the second lay a polymer separation element is introduced occupying an area of one pair in cross-section and along the whole length; introduced in the second lay are four similar separation elements, three of them separating each three pairs in the lay from each other while the fourth separating four pairs in the lay from each other along the whole of the cable length.
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Balanced unshielded 25-paired cable of category 5e of bunch structure with improved characteristics / 2462777
Balanced unshielded 25-paired cable of category 5e with improved characteristics includes polymer-insulated cords which are twisted in pairs, and external polymer sheath; polymer corrugated and perforated tube is arranged in the centre, and twenty five pairs are divided into five bunches, five pairs in each bunch; at that, to each bunch there introduced is five-beam polymer corrugated separating element between beams of which there arranged is one pair, and each bunch is laced into perforated band with covering of edges throughout the cable length, and all of five beams are twisted between each other around central polymer corrugated and perforated tube.
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Symmetrical four-pair cable of category 6a with improved characteristics / 2470397
Invention relates to the field of electrical engineering and may be used for design of symmetric and optical communication cables within a shared network or structured cable systems. In a symmetrical four-pair cable, comprising strands in polymer insulation, a breaking cord and an outer polymer shell, each symmetric pair is separated from the neighbouring symmetric pair with an introduced hollow polymer tube, as a result of which a layer is created from four polymer tubes and four symmetric pairs, separated from each other with hollow polymer tubes at the same time, and this layer is twisted with a large pitch around the central hollow polymer tube, the outer diameter of which is equal to two diameters of the symmetrical pair, besides, each symmetrical pair is placed into a polymer perforated tape with coverage of edges along the entire length of the cable, and the hollow central tube and hollow tubes between symmetric pairs have identical external diameter.
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FIELD: electricity.
SUBSTANCE: invention relates to the field of electrical engineering and is to be utilised for design of symmetrical communication cables within a shared network or structured cable systems. Concept of the invention is as follows: the symmetrical four-pair cable consists of cores with membranous-and-porous film insulation twisted into pairs and into a general lay contained in an outer sheath of a polymer material; insulation of each core within the porous layer and the membranous layer contacting each core is perforated along the whole length within each layer at an independent pitch.
EFFECT: reduction of dielectric loss and capacitive component of intra-pair interference.
1 dwg
The invention relates to the field of electrical engineering and can be used in the construction of symmetric cable connection to the public network and structured cabling systems.
Known design chetyrekhmernogo cable containing copper conductors in a dielectric insulation, twisted into pairs with varying step, the total outer dielectric shell (the book "Structured cabling systems", authors: Abelev, Skitracks, Ironcally, Dmcintelect, M. 2002, 4th edition, p.109, fig.3.4 and 3.5). The disadvantage of this design is the high value of the relative dielectric constant insulation of the cable. Depending on the category, there are various types of insulation of cables: cable cores 1 category is used as insulation polyethylene having a relative dielectric constant of 2.3; cable category 3 is used dielectric material for isolation also lived with a relative dielectric constant of 2.3; cable category 5e is used as insulation cellular polyethylene shell - film-porous polyethylene with a relative dielectric constant of 2.0; for cables category 6 is used Teflon insulation lived with a relative dielectric constant of 2.0.
Known design h is terehanova cable, consisting of two groups of four, twisted of two pairs each, with film-porous insulation lived and external polymeric sheath (p.106, fig.3.2 b the above-mentioned book). The disadvantage of this design is the high value of the relative permittivity insulation.
Closest to the technical essence is the design chetyrekhmernogo cable described in the prospectus of the company Teldor, Wires and Cables, Russia Ltd. 2006, 223 S., p.35 (website: www.teldor.com.). The cable consists of four unshielded twisted (twisted) pairs twisted together, the sheathed PVC for internal fixed wiring; diameter of 0.51 mm, insulation polyolefin (film-porous-film insulation), the outer diameter of insulated conductor 0.9mm; external cable diameter of 5.0 mm
Given the maximum speed of signal propagation, equal to 0.7 of the speed of light, relative dielectric constant insulation equal to 2.0, which is also the main disadvantage of this cable.
The tasks which seeks this solution is the creation of such a structure symmetrical chetyrekhmernogo cable, which allows you to reduce the relative dielectric constant insulation of the cable, to reduce the capacity of the steam and, therefore, the dielectric loss and capacitance of sostavlyayuscyeye between pairs.
To solve the problem in chetyrekhmernom cable containing wires in film-porous-film insulation, twisted into pairs, and in General Powel, with an external polymeric sheath, the insulation of each conductor in the porous layer and the film layer in contact with a floor made of perforated along the entire length of each layer with independent increments.
The drawing shows the construction is symmetric chetyrekhmernogo cable. It contains: core 1, a perforated film in contact with the housing 2, the perforated porous insulation layer core 3, the outer foil insulation cores twisted pair 5, the outer polymer sheath of the cable 6.
In this design, due to the perforations in the porous layer and plastic film insulation layer in contact with the housing, is significantly reduced relative dielectric constant insulation through holes, in which the relative dielectric constant equal to 1.0 (the relative permittivity of air is 1). Depending on the frequency of perforation can be changed relative dielectric constant within a wide range, reducing the thickness of the insulation and reducing the dielectric loss. Since the dielectric constant unperforated insulation in the proposed material is equal to 2, taking into account the porosity intermediate the Loya film-porous insulation film while filling the through holes of the porous layer and the film layer, contact with the conductors in the amount of 30% of the total isolation of the veins, to get the relative dielectric constant of the entire insulation of the conductors equal to 1.7, and when filling out the perforated holes in the range of 50% to get the relative dielectric constant of the entire installation veins, equal to 1.5. This reduces the attenuation factor by reducing losses in the insulation impedance and the capacitive component of influence between pairs, and by reducing the thickness of the insulation and, consequently, the distance between conductors in a pair is reduced and the inductance of the circuit.
Symmetric chetyrehpolnye cable containing wires in film-porous-film insulation, twisted into pairs, and in General Powel, with an external polymeric sheath, characterized in that the insulation on each conductor in the porous layer of each conductor in the film layer in contact with each residential performed perforated along the entire length of each layer with independent increments.
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