Abstract: A composite superconducting wire using ceramic superconductor material in which one or more elongated superconductor material are accomodated in one or more grooves formed on an elongated reinforcing member so that a long size superconductor wire can be provided. Various methods of producing such composite superconductor wire are also disclosed.

Abstract: A method for producing an aluminum-stabilized superconducting wire is dislcosed herein, which comprises alternately winding superconducting elementary wires and high purity wires around a core, such as an electrically insulated copper wire core, impregnating the entire wire arrangement with solder to bind the wires together and subsequently forming or drawing the wire arrangement to increase the adhesion between the wires. In another embodiment, the thus-impregnated wire arrangement is subjected to a heat treatment to recover the residual resistance ratio of the aluminum. The impregnated wire arrangement is characterized by having a high mechanical toughness and improved electrical contact for greater electrical stability.

Abstract: A method of manufacturing an Al-stabilized superconductor is disclosed. The method comprises combining into a composite a thin elongated Al member and a superconductive wire. The Al member is preferably comprised of high purity Al having a purity of not less than 99.9% and the superconductive wire is comprised of copper or a copper alloy matrix. The method produces a composite with strong adhesion between the Al member and the superconductive wire even under adverse conditions. Further, the method can be easily and quickly carried out.

Abstract: The invention relates an Al-stabilized superconducting wire for use in a superconducting magnet used in a charging magnetic field, such as a pulse magnet and the like, and particularly to an Al-stabilized superconducting wire having the properties of reduced size and light weight, high current density, high stability, low AC loss, etc., and a method for producing the same. The said Al-stabilized superconducting wire has a core chosen from a superconducting elementary wire, an electrically insulated Cu or a Cu alloy, or a nonmagnetic metal or alloys thereof, and wherein the superconducting elementary wires and high purity Al wires are alternately stranded around said core. The stranded cable is bonded by impregnating it with solder, or further by subjecting it to a reduction process and heat treatment thereby making it possible to obtain an aluminum stabilized superconducting wire having said high properties.

Abstract: The device of the present invention utilizes a processing principle for time-axis compression-expansion devices which presents variations of reproduction speed from reducing the intelligibility of sounds. Sound signals, without being subjected to any time-axis processing, are altered in frequency while some reduction in intelligibility would be expected to occur, the sound signals are subjected to time-axis transformation processing (compression-expansion processing) to yield reproduced signals of high intelligibility.The present invention is characterized by the capability of making this type of processing available through the use of simple, inexpensive system configurations such as an analog to digital conversion system based on delta/.DELTA. modulation. The speed-changer signal processing circuitry is bypassed automatically when record-playback speeds are the same to avoid processing noise.