摘要:
Electrical conductors according to the invention include conductors made from a plurality of strands twisted around a central conductor, where the strands are fused to the central conductor but not to each other. According to a preferred embodiment, the central conductor is coated with a coating of a first material which may be melted to fuse the central conductor to the outer strands. In another preferred embodiment, the outer strands are also coated with a second conductive material which forms a eutectic mixture with the coating on the central conductor when heated to a temperature below the melting points of the first and second conductive materials. Alternate embodiments of the invention provide a eutectic mixture by choice of strand and central conductor material and/or coating. If desired, the conductor is deformed prior to melting the coating(s) such as by drawing or swaging to form a conductor with a substantially circular cross section or by rolling or drawing to form a conductor with a substantially rectangular cross section. In still another embodiment, the conductor is formed as a coil prior to melting the coating(s). The conductors of the invention exhibit enhanced electrical and physical characteristics and are particularly well suited for use in conducting VHF and UHF signals and for making coils.
摘要:
An electrically conductive cable includes a number of conductive strands which are twined to form a wire rope. The wire rope is drawn through a die to reduce its diameter until the outer surface of the conductor is smooth and the cross section of the conductor is substantially circular. According to a presently preferred embodiment, the electrically conductive cable is successively drawn through four dies of decreasing diameter so that the overall diameter of the wire rope is reduced by at least approximately 18 percent. The resulting electrically conductive cable has the tensile strength advantage and the low resistance advantage of a solid conductor with the flexibility advantage of a wire rope cable. In addition, the smooth outer surface of the electrically conductive cable according to the invention is easily insulated with an extruded material.
摘要:
A high conductivity wire and a method of manufacturing the same are described wherein the high conductivity wire includes three or more conducting wires. In the method, conducting wires cross each other and are coiled regularly and three dimensionally. The conducting wires are coated with an insulating material.
摘要:
Medical devices are provided which utilize a highly flexible cable of two and preferably three or more strands of wire, at least one of which is a nickel-titanium alloy strand. The strands are twined to form a wire rope which is drawn through successive dies to reduce its diameter until the outer surface of the cable is substantially smooth. A cable of all nickel-titanium alloy strands has been found to have an improved elasticity over a superelastic nickel-titanium wire of the same diameter. The cable is used in medical devices in which increased elasticity of a wire-like element is desired. Twisted and drawn cables incorporating a strand of a radiopaque metal or alloy with one or more nickel-titanium strands may be used in devices in which radiopacity of a flexible portion of the device is desired. Twisted and drawn cables incorporating a strand of a highly electrically conductive metal or alloy with one or more nickel-titanium strands may be used in devices in which electrical conductivity of a flexible portion of the device is desired.
摘要:
An electrical conductor having the ability to absorb and store water appearing on the surface and to remove the stored water by transporting it to an expulsion site. This is achieved in one embodiment by supplying a central conductor with a porous, absorbent and electrically conducting outer layer. Similar results obtain when the strands of a multi-strand conductor are provided with azimuthal threads or grooves of a certain fineness and an additional electrochemical or chemical treatment of the surface for improved wettability.
摘要:
The present invention relates to the art of electroenergetics, and more particularly to aerial electric transmission lines. Still more particularly, the invention relates to a method for suppressing galloping in aerial conductors and to a span wherein the method is realized. It is the basic object of the invention to provide a method for suppressing galloping in aerial conductors based on changing the mechanical characteristics thereof and consisting in that the conductor in a span confined by two adjacent towers or poles is divided into at least two portions. Thereafter, the mechanical characteristics of the conductor are altered by displacing the centers of gravity of its cross sections relative to the flexural centers thereof in one direction over one portion and in the opposite direction over the other portion of the span from the vertical plane going through the line of the flexural centers of the conductor cross sections. According to one of the embodiments of the invention, the span of an electric transmission line comprises a conductor provided with two eccentric weights each rigidly attached to each portion of the span and arranged on either side of the vertical plane passing through the line of the flexural centers of the conductor cross sections at an angle of 40* to 45* to said vertical plane in the gravity direction.
摘要:
Provided herein are composite materials and methods of making composite materials including carbon nanoscale fiber networks. The composite materials may include a stretched and doped carbon nanoscale fiber network and a capping layer. The methods of making the composite materials may include stretching a carbon nanoscale fiber network, contacting the nanoscale fiber network with a dopant, and disposing a capping layer on a surface of the carbon nanoscale fiber network.