Abstract: The process of the invention to make miniaturized multipolar cables includes the steps of combining together a plurality of individually insulated conductors, inserting a filling in a pasty state and containing mineral fillers into the gaps existing between the conductors, partly hardening the filling and disposing the other cable components, in particular the sheath, around the conductors-filling assembly, and letting the filling become completely hard within the produced cable.

Abstract: An insulated wire is provided with excellent heat stability and strippability. The wire is coated by a resin composition obtained by mixing 10 parts by weight or less of calcium-zinc stabilizer, 2 to 10 parts by weight of hydrotalcite and 0.1 to 1 part by weight of stearic acid to 100 parts by weight of vinyl chloride resin. This wire is most effective when the size thereof is 0.3 to 2 mm.sup.2 and the thickness of its insulation coating is 0.2 to 0.5 mm.

Abstract: A telecommunications cable is disclosed in which a plurality of inwardly extending projections from the cable jacket, form a first and second plurality of substantially parallel longitudinal channels within the cable jacket. The first and second plurality of longitudinal channels are spaced apart from one another with respect to a reference line that transverses the cable, wherein the plurality of inwardly extending projections provide the spaced apart distance between the first plurality and the second plurality of longitudinally extending channels and between corresponding transmission media disposed within the first and second plurality of longitudinally extending channels. With this arrangement, cross talk between the transmission media within the cable is reduced and alien crosstalk between adjacently disposed or stacked cables is also reduced.

Abstract: A method of constructing twisted pair cables having an average impedance of no less than 97.5.OMEGA. and no more than 102.5.OMEGA. is disclosed. The longest lay length pair is used as a base reference and the construction of each additional twisted pair is altered to better match the averaged impedance. Specifically, the insulated conductor thickness T.sub.i of each twisted pair is adjusted, dependent upon the configuration of the base pair.

Abstract: A communications cable having superior electrical characteristics and meeting the burn requirements for plenum applications has a core formed of one or more twisted wire pairs having primary insulation formed of a suitable material, such as high density polyethylene. The core is surrounded by a single outer jacket formed from a material having excellent heat/flame resistance characteristics and acceptable electrical characteristics that are substantially stable at relatively high temperatures, such as a foamed thermoplastic halogenated polymer, for example polyvinylidene fluoride material. The electrical conductors utilized by the cable are oversized (relative to conventional 24 gauge conductors) to enhance the electrical performance of the cable. An air gap formed between the conductor core and the outer jacket further enhances the electrical performance of the cable.

Abstract: A cable system including device connectors connected to electropneumatic valves and electrical sensors at predetermined positions along a path on a common manifold and a wiring harness having a length sufficient to transverse the path. The wiring harness includes a plurality of insulated wires in a common sheath and selectively connected to harness connectors which are mounted at predetermined positions to the harness and mate with a corresponding device connector. The path is a closed loop and the wiring harness forms a corresponding closed loop. The majority of the wires in the wiring harness form the corresponding close loop.

Abstract: A stator winding insulation for improving the dielectric and thermal properties of a main insulation of a conductor bar of an electric machine. The stator winding insulation includes a mica band having at least one layer-like carrier composed of longitudinal threads and transverse threads and a mica-containing layer fixed to at least one face of the carrier with the aid of a binder. In the layer-like carrier, the volume ratio of the longitudinal threads to the transverse threads is greater than or equal to 2.5:1 and a weight ratio of the mica in the mica-containing layer to the layer-like carrier in the mica band is greater than or equal to 6:1.

Abstract: A ground plane cable has a layer of first conductors. A layer of second conductors is arranged in parallel to the first conductors. A grounding plate is arranged between the first and second conductors. Each layer of first and second layer of conductors has at least a conductor electrically contacting with the grounding plate.

Abstract: A multiconductor electrical cable, for use in a subterranean wellbore, having which a plurality of electrical conductors, a jacket of insulation material, and a non-metallic armor. The non-metallic armor comprises one or more layers of extruded materials or an external wrapping of materials, selected from the group consisting of extruded thermoplastic materials, extruded thermoset materials, and fiber reinforced composite materials. The non-metallic armor eliminates corrosion problems associated with prior metallic armors, and provides significant weight savings over prior metallic armors.

Abstract: A SCSI external cable for interconnecting external peripheral devices to a host computer system or other peripheral devices is provided. The SCSI cable is configured to be ultra-thin and flexible and is designed to handle high bandwidths and support longer cabling distances, relative to conventional SCSI cabling.

Abstract: A uni-wire vehicle wiring harness system and method for extending electrical power from a front portion of a vehicle to lighting and accessories proximate the rear of the vehicle, the vehicle includes a uni-wire cable pair which includes a curb side cable with conductors solely supplying power to curb side marker, tail and signal lights and a road side cable solely supplying power to road side marker, tail and signal lights. The curb side and road side cables are attached to each other via a web extending between their respective insulation jackets.

Abstract: A method of and an apparatus for making twisted electrical cable, such as 600 volt secondary distribution (UD) cable, and the twisted cable product are disclosed. The apparatus comprises a first plurality of stationary payoff reels each wound with a length of stranded bare wire conductor. The stranded conductors are simultaneously payed off the reels to a pay out accumulator for accumulating a portion of the stranded conductors during replacement of spent pay out reels. An extruder apparatus arranged downstream of the accumulator applies a plastic insulation material to a respective stranded conductor as it passes through the extruder. A cooling trough through which water is flowed cools the plastic insulation. A take-up accumulator arranged downstream of the cooling trough accumulates a portion of each insulated conductor during changeover of the take-up arranged downstream of the take-up accumulator.

Abstract: A wire for use in robot including a conductor of metallic fiber-reinforced copper matrix composite whose plastic strain to rupture is substantially less than 0.2%. A plurality of conductors form a twisted wire (2). An insulation member (4) is coated on the twisted wire (2) to form a coated wire (6). The conductivity of the conductor is greater than 70% IACS and the tensile strength of the conductor is greater than 100 Kg/mm.sup.2. The metallic fiber-reinforced copper matrix composite is in-situ metallic fiber-reinforced copper matrix composite drawn with a total reduction in sectional area of 99.99% or more.

Abstract: A composition comprising:(a) polyolefin;(b) as a scorch inhibitor, 4,4'-thiobis(2-methyl-6-t-butyl phenol); 2,2'-thiobis(6-t-butyl-4-methylphenol); or mixtures thereof;(c) hydroquinone; a substituted hydroquinone; or mixtures thereof in an amount sufficient to control color formation; and(d) an organic peroxide.

Abstract: An electrical cable is disclosed in which at least two pairs of insulated conductors are bound by a substantially circular jacket. The conductors in one of the pairs are twisted or rotated about one another in a spiral pattern at a frequency corresponding to a first twist lay or length. The conductors in a second pair are also twisted about one another at a frequency corresponding to a second twist lay. Finally, the two pairs of conductors are stranded about one another at a frequency corresponding to a strand lay. The substantially circular jacket resists the tendency to jam cable processing machines (e.g., a connectorization machine) when being dispensed from a pay-off reel, which is a common problem in prior art patch cord designs. As a result, the cable reduces manufacturing costs. In addition, the cable provides improved electrical performance, as measured by several performance standards, over prior art cable designs.

Abstract: 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.

Abstract: An improved twisted-pair interconnect includes a first conductor and second conductor. Over the first half of the interconnect the first conductor is uninsulated and the second conductor is insulated. Over the second half of the interconnect the first conductor is insulated and the second conductor is uninsulated. An insulation barrier is provided at the midpoint of the interconnect to prevent shorting. In a further improvement, the twisted-pair cable is constructed from an insulated and an uninsulated conductor which are twisted together, severed at a midpoint, and reconnected with the conductors swapped, causing each conductor to be half-insulated and both conductors to have the same length. To reduce electromagnetic coupling and preventing external contact with the uninsulated conductors, the twisted-pair can be enclosed by flexible straight or grooved gas-filled tubing.

Abstract: A communications cable is provided having at least one elongate electrical conductor surrounded by a layer of insulating material, said layer including a chemically blown fluorinated polymer having a melting point of greater than about 480.degree. F. The elongate electrical conductors may be provided as at least one pair of twisted wires, each wire thereof surrounded by a layer of insulating material including the chemically blown fluorinated polymer. The fluorinated polymer is preferably a high melting fluorinated polymer and is chemically blown by a blowing agent such as the barium salt of 5-phenyltetrazole. The communications cable includes insulated wires which possess a layer of foamed fluorinated polymer insulating material having uniform thickness and electrical properties along the length of the wire. The fluorinated polymer can be applied on the conductor in a relatively thin layer which minimizes the amount of fluorinated polymer material used to insulate the individual conductors.

Abstract: Polyamide coating compositions that demonstrate strength and toughness, flame and corrosion resistance and resistance to hydrolysis and thermal degradation at coating thicknesses of less than or equal to 0.25 mm or 0.15 mm are provided. Such coating compositions are extremely useful for coating wires or cables that are housed in automotive electrical harnesses.

Abstract: The invention relates to a flat cable for transmitting high bit rate signals including at least one pair of individually insulated conductors, a layer having at least one groove and a conductive grounding member located on the surface of each groove. This cable includes two conductors each individually twisted with a short lay and thus maintained juxtaposed in the same groove of the layer. Application to cables for local area networks of computers working at frequencies that can attain 100 MHz.

Abstract: A communications cable having superior electrical characteristics and meeting the burn requirements for plenum applications has a core formed of one or more twisted wire pairs having primary insulation formed of a suitable material, such as high density polyethylene. The core is surrounded by a single outer jacket formed from a material having excellent heat/flame resistance characteristics and acceptable electrical characteristics that are substantially stable at relatively high temperatures, such as a foamed thermoplastic halogenated polymer, for example polyvinylidene fluoride material. The electrical conductors utilized by the cable are oversized (relative to conventional 24 gauge conductors) to enhance the electrical performance of the cable. An air gap formed between the conductor core and the outer jacket further enhances the electrical performance of the cable.

Abstract: A primary conductor having a solid wire or wire strands that are enclosed by an insulating coating which has ribs that extend radially outwardly. The insulating coating provides electrical insulation between neighboring conductors. The ribs define air spaces which are between the ribs and space the insulated primary conductors from each other, thereby reducing the overall dielectric constant of the cable assembly. This in turn reduces the line-to-line capacitance between adjacent conductors, thereby minimizing Near End Cross Talk.

Abstract: An article of manufacture comprising (i) a plurality of electrical conductors, each surrounded by one or more layers of a mixture comprising one or more polyolefins and the reaction product of (a) a functionalized hindered amine amic acid hydrazide and (b) a functionalized hindered phenol or a functionalized hindered amine hydrazide and (ii) hydrocarbon cable filler grease within the interstices between said surrounded conductors.

Abstract: A signal cable for transmitting a plurality of signals is applied to a video endoscope having a solid state image pick-up device. Signal lines for transmitting substantially the same signals of the plurality of signals are combined and stranded into a stranded line. The stranding pitch of the stranding line is different from that of a stranding line for transmitting other signals.

Abstract: A shielded patch cable has a series of wires and a first foil of an electrical conductive material, the first foil surrounding the series of wires over their length. The patch cable also has a capacitor for preventing the formation of a grounding loop upon connection of the cable. The capacitor is formed by the first foil surrounded by an intermediate layer of an electrical insulating material, which insulating material is surrounded by a second foil of an electrical conductive material.

Abstract: A communication cable includes at least one twisted pair of electrical conductors each having a surrounding layer of electrical insulation formed from fluroethylenepropylene (FEP) and at least one additional twisted pair of electrical conductors each having a surrounding layer of electrical insulation formed from an olefin based compound. The cable includes a cable jacket encasing the at least one twisted pair and the at least one additional twisted pair of electrical conductors. The cable meets or exceeds the requirements of the Underwriter's Laboratory UL Standard 910 Test Method For Fire and Smoke Characteristics of Cables Used In Air-Handling Spaces.

Abstract: A communication cable includes a first plurality of twisted pairs of electrical conductors, wherein each electrical conductor is surrounded by a layer of plenum rated insulation. The cable also includes a second plurality of twisted pairs of electrical conductors, wherein one conductor of each pair is surrounded by a layer of plenum rated insulation and the other electrical conductor is surrounded by a layer of non-plenum rated insulation. In an alternate embodiment, a communication cable includes a plurality of twisted pairs of electrical conductors, each pair having a first insulating material about one of the electrical conductors and a second insulating material about the second electrical conductor.

Abstract: A cable and method of monitoring the aging of critical cable components in-situ. The cable includes a specimen element which is located in proximity to the individual conductors of the cable. The cable and specimen element are exposed to similar aging stressors, and the aging of the specimen element is analyzed to estimate the aging of the installed cable in a completely non-destructive manner.

Abstract: A high speed telecommunication cable includes at least two soft supports, such as a flame retardant polypropylene material, each having a plurality of embedded twisted pair conductors disposed therein and a plurality of wrapped twisted pair conductors disposed about the periphery thereof.

Abstract: An electrical power cable includes a central ground conductor surrounded by an insulating material layer. An inner grounded shield is formed on the surface of the ground conductor or between the ground conductor and line and neutral conductors. A plurality of insulated line conductors and a plurality of insulated neutral conductors are circumferentially disposed in an annular arrangement about an insulation layer on the inner shield. The plurality of line and neutral conductors are each disposed circumferentially side-by-side in separate groups of line and neutral conductors. The total cross-sectional area of each group of line conductors and neutral conductors is substantially equal to the total cross-sectional area of a single large conductor of equivalent ampere rating. An outer shield is disposed about the line and neutral conductors and covered by an outer insulating layer.

Abstract: A plenum cable is provided which passes the category 5 requirements, including the UL 910 burn/smoke test, the cable containing at least four twisted pairs of insulated conductors, the insulation of one of the pairs of insulated conductors being foamed polyolefin which is free of flame retardant additive and the insulation of the other three twisted pairs of insulated conductors being fluoropolymer, the cable having a skew between twisted pairs of no greater than 30 nanoseconds.

Abstract: A communication cable includes at least a first and a second twisted pairs of conductors. The first twisted pair of conductors is covered by a first insulation material, and the second twisted pair of conductors is covered by a second insulation material that is different than the first insulation material. The second twisted pair of conductors has a signal phase delay that is substantially equal to the signal phase delay of the first twisted pair of conductors such that the skew of the cable is substantially zero. In certain embodiments, the first insulation material is a fluoropolymer. In such embodiments, the second insulation material may be a nonfluoropolymer. In addition, the twist lay of the first twisted pair of conductors may be different than the twist lay of the second twisted pair of conductors. Moreover, the thickness of the first insulation material may be different than the thickness of the second insulation material.

Abstract: A flexible and limp cable (1) is constructed with: an outer jacket (2) containing at least one row of adjacent insulated conductors (3) circumferentially encircling an elongated axis lengthwise of the cable (1), and conductive drain wires (4) in selected interstitial spaces along the adjacent insulated conductors (3), the insulated conductors (3) and the drain wires (4) extending helically along the axis, and a conductive membrane (7) circumferentially enclosing the insulated conductors (3) and the drain wires (4), and the membrane (7) engaging the drain wires (4).

Abstract: A composite cable with built-in signal an power cables is mainly used as a control cable for a machine tool and the like. The composite cable contributes to reduced cost, downsizing, higher reliability and higher safety, which are obtained because only a single cable needs to be laid, instead of the conventional cable, which requires multiple cables to be laid. In the composite cable with the built-in signal and power cables, a flat signal cable formed by a plurality of insulating cores arranged in parallel in the lengthwise direction, and having alternately repeated combined portions and separate portions is spirally wound into a roll around one or more power cables provided in the center of the composite cable. The power cables each have a large conductor size. A first shield is optionally provided around the flat signal cable. A second shield is optionally provided around the power cables. A sheath is provided around the flat signal cable or the first shield.

Abstract: A high-speed data communications cable has geometrically concentric layers of twisted pairs of wires. A first, innermost layer includes a first twisted pair of wires having a unique lay length and a first and second dielectric filler. A second geometrically concentric layer is formed about the innermost layer and includes 9 twisted pairs of wires having 5 lay lengths. A third geometrically concentric layer is formed about the second layer and includes 25 twisted pairs of wires having 5 lay lengths. The first, second and third layers are enclosed in a thermoplastic jacket resulting in a flexible data cable with a minimal diameter. Additional layers of more twisted pairs of wires may also be used. A plurality of communication cables may also be commonly sheathed.

Abstract: There is disclosed a communications cable having a cable jacket and a first pair of twisted wires disposed within the jacket, each wire thereof having a conductor surrounded by a first insulating material. A second twisted pair of wires is disposed within the jacket and has a twist lay length different from that of the first twisted pair. Each wire of the second twisted pair has a conductor surrounded by an insulating material. The insulating material of the first twisted pair differs in a physical property from the insulating material of the second twisted pair, the physical property of the insulating material of the second pair being correlated with the physical property of the insulating material of the first twisted pair and with differences in twist lay length of the first and second twisted pairs so that the phase delay of the twisted pairs is matched. There is also provided a communications cable having more than two twisted pairs.

Abstract: A cable construction comprises the following components: (i) a plurality of insulated electrical conductors having interstices therebetween, said insulation comprising (a) one or more polyolefins selected from the group consisting of polyethylene, polypropylene, and mixtures thereof, and, blended therewith, (b) a mixture containing one or more alkylhydroxy-phenylalkanoyl hydrazines and one or two functionalized hindered amines; (ii) hydrocarbon cable filler grease within the interstices; and (iii) a sheath surrounding components (i) and (ii) wherein said hindered amines have the following structural formulae: ##STR1## wherein n is about 2 to about 12; R is CxHyOz wherein x is about 2 to about 6, y is about 4 to about 16, and z is zero to about 3; ##STR2## wherein m is about 2 to about 30; n is about 2 to about 30; and x is about 1 to about 30; or ##STR3## wherein n is about 2 to about 20.

Abstract: Insulated electrical cables which are suitable for use in gasoline fuel tanks comprise a stranded conductor which is blocked by a polysulfide and is covered by polyamide insulation.

Abstract: An electrical cable for use in high-frequency, high power applications, such as with an inductive charging system used to charge batteries of an electric vehicle. The cable has multiple twisted-pairs of separately insulated stranded wire arranged in a pseudo-Litz wire architecture that surround a coaxial cable. The coaxial cable carries bidirectional RF communication signals between a power source of the charging system and the vehicle. The cable has an outer EMI shield that includes a metalized mylar layer surrounded by a high coverage tinned-copper braid layer. The multiple twisted-pairs of wires and coaxial cable are embedded in a polytetrafluoroethylene filler material that surrounds them inside the outer EMI shield. An outer silicone cover is disposed around the outside of the cable. The cable efficiently transfers power at high-frequency AC power, between 100 KHz to 400 KHz at high-voltage levels, on the order of from 230 V to 430 V. The cable carries bidirectional RF communication signals using a 91.

Abstract: A method of producing an electric cable and an electric cable. In the electric cable, a short-circuiting layer is provided between an insulated conductor/insulated conductors (4a) and a protective covering (7) surrounding the conductor/s, the short-circuiting layer being formed by short-circuiting wires (3) extending substantially parallel with the conductor/s, and a contact member (6) positioned substantially transversely to the short-circuiting wires and connecting the wires electrically. To speed up the production process, the contact member (6) is formed of a bundle of wires.

Abstract: A plenum cable having a plurality of twisted pair conductors with at least one pair having a non-fluorinated polyolefin insulation and all of the twisted pair conductors which are adjacent to each other having a lay length of about 0.4 to 4" with the preferred lay length being 0.4 to 1.25 inches. The lay length of the non-fluorinated polyolefin twisted pair conductor is preferably 1.0 to 1.25 inches and the lay lengths of the fluorinated polyolefin twisted pair conductors is preferably 0.5 to 85". The twisted pair conductor insulation is preferably radially joined along the entire length thereof. Preferably, the twisted pair conductors all have an impedance of 90 to 110 ohms and the impedance does not vary by more or less than .+-.0.05 of an average impedance. Also, the twisted pair conductors preferably have a center-to-center distance that does not vary by more or less than .+-.0.03 of an average center-to-center distance.

Abstract: A cable construction comprising the following components: (i) a plurality of insulated electrical conductors having interstices therebetween, said insulation comprising (a) one or more polyolefins selected from the group consisting of polyethylene, polypropylene, and mixtures thereof, and, blended therewith, (b) a mixture containing one or more alkylhydroxy-phenylalkanoyl hydrazines and one or two functionalized hindered amines; (ii) hydrocarbon cable filler grease within the interstices; and (iii) a sheath surrounding components (i) and (ii) wherein said hindered amines have the following structural formulae in which n is about 2 to about 10: ##STR1##

Abstract: A cable assembly includes a plurality of insulated wires that are arranged in groups of one or more wires with adjacent pairs of the groups being interconnected at any given longitudinal location over the length of the cable. Therefore, the cable defines spaced attachment zones and unattached zones for the groups of wires along the length of the cable with each of the attachment zones including the interconnection of only a single pair of the groups of wires, successive attachment zones being spaced by a respective unattached zone and successive attachment zones interconnecting alternating pairs of the groups of wires. All of the wires are preferably encased in a flexible jacket having a substantially circular cross-section. With this arrangement, the wires extend for the length of the cable without skew and yet the overall cable is extremely flexible.

Abstract: A patch high-speed cable for LAN applications having a jacket surrounding at least two twisted-pair insulated cables. Each of the twisted-pair cables have at least one tin sealed stranded tinned metal conductor. The tin sealed stranded tinned metal conductor has 7 or 19 tinned metal strands and a size of 24 or 26 AWG. Each of the tinned metal strands has a tin coating of 20 to 90 micro-inches. The insulation on the metal conductor has a thickness of about 0.007 to about 0.011 inches and a dielectric constant of about 2.2-2.5 and a dissipation factor of 0.0001 to 0.001. The twisted pair cable has an attenuation dB/100 ft. increase of less than 1.0 and preferably less than 0.5 when subjected, as an unterminated twisted pair cable over a 35 day period, to 100 MHz per 100 ft. and ambient air having a humidity of 40 to 80%.

Abstract: A helical resiliently extensible and retractable multiconductor coil cord including a plurality of conductor components enclosed within an outer jacket. One of the conductor components includes a metallic conductor centrally disposed within and surrounded by a first dielectric material which in turn is centrally disposed within and surrounded by a metallic shield covered by an inner jacket. The other conductor components each include a metallic conductor covered by a second dielectric material. In one embodiment the metallic shield includes a plurality of sets of wires helically wrapped around the dielectric material in mutually opposing directions, at least one of the sets of wires being wrapped around the dielectric material at an angle of less than about 20 degrees with respect to the axis of the conductor.

Abstract: A biomedical lead conductor cable formed of a core wire strand and a plurality of perimeter wire strands wrapped in a helical pattern around the core wire strand, wherein the core wire strand is formed of M wires and the perimeter wire strands are formed of N wires. The core wire strand is formed of a first core wire and M-1 first peripheral wires helically wrapped about the first core wire in a non-overlapping manner, the first core wire having a mechanical strength exceeding the mechanical strength of each first peripheral wire and an electrical conductivity lower than the electrical conductivity of each first peripheral wire.

Abstract: A multi-core cable (15) for communicating electric power and electrical signals to and from a hand held power nutrunner (10). Three longitudinal sections (16-18) are arranged in parallel with each other, and each has a geometric center (20-22) such that in any cross section of the cable (15) the geometric centers (20-22) are disposed on a straight line (24). A flex zone (A) is arranged adjacent the nutrunner (10) and has a preformed longitudinally twisted shape for obtaining a universal flexibility of the cable (15) and, thereby, a comfortable handling of the nutrunner (10).

Abstract: A plenum cable having a plurality of twisted pair conductors enclosed by a jacket. A plurality of the twisted pair conductors has one insulating material thereon and at least one twisted pair conductor has a different insulation material thereon. In the preferred structure at least one twisted-pair conductor has flame retardant polyethylene or flame retardant polypropylene insulation and at least one other twisted pair conductor being insulated with fluorinated ethylene propylene, tetrafluoroethylene, or ethylenechloro-trifluoroethylene. The preferred twisted pair conductors have a center-to-center distance along any point of a 1000 ft. twisted pair conductor that is .+-.0.3 of an average center-to-center distance and/or have an impedance of 90 to 110 ohms and a variation of .+-.0.

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: We provide a twisted pair cable which is exceptionally suitable for high frequency signal transmission. One embodiment provides a twisted pair cable having a center-to-center conductor spacing at any point along a 1000 ft. cable that varies .+-.0.03 times the average of the center-to-center conductor. Another embodiment provides a twisted pair cable having an impedance of 90 to 110 ohms with a tolerance of .+-.5% of an average impedance. The preferred twisted pair cable has their dielectrics joined along the entire length thereof. Preferably, the two adjoined insulated conductors have an adhesion strength of between 0.1 to 5 lbs. force and preferably 0.25 to 2.5 lbs. force.