Abstract: A medical guidewire comprised of an NiTi-based alloy having a high elasticity over a wide range of strain, excellent straightness, and preferable shape and characteristics of a stress-strain curve in a tensile test. The wire is obtained by applying a predetermined tension to a cold drawn NiTi-based alloy wire and mechanical straightening it under conditions of a predetermined torsional shear strain and temperature and shows superior pushability, torque transmission, and reinsertability as a medical guidewire, so is preferable for a catheter guidewire, endoscope guidewire, etc.

Abstract: A device which is installed onto an ingrown nail of a human toe to correct the ingrown nail, includes a support member affixed to the ingrown nail, and a correcting member supported by the support member and effecting force on the ingrown nail toward the correcting direction for the ingrown portion of the nail. The correcting member may be formed of a superelastic material which is shape-memory-treated to memorize a first shape, and which is deformed to a second shape different from the first shape so as to be installed onto a surface of the ingrown nail of the human toe in the second shape.

Abstract: Composite parts of Ni-Ti alloys joined to a different metal have a melt forged structure obtained through the reactive fusion of both metals, initiated by the fusion of at least one metal bordering on the joint interface and the application of pressure; a hot forged structure of Ni-Ti alloy obtained through softening the alloy at high temperature and applying pressure on the Ni-Ti alloy side of the joint; and a hot forged structure of the different metal obtained by softening the metal at high temperature and applying pressure on the different metal side of the joint.

Abstract: Composite parts of Ni-Ti alloys joined to a different metal have a melt forged structure obtained through the reactive fusion of both metals, initiated by the fusion of at least one metal bordering on the joint interface and the application of pressure; a hot forged structure of Ni-Ti alloy obtained through softening the alloy at high temperature and applying pressure on the Ni-Ti alloy side of the joint; and a hot forged structure of the different metal obtained by softening the metal at high temperature and applying pressure on the different metal side of the joint.

Abstract: The present invention relates to a processing method of wire material and a processing device therefor at the times of intending to make the tip of wire materials such as guide wire for catheter thin and flexible by tapering.When the wire material passes through the electrolytic tub, the wire speed is made constant and the current value is controlled, or the current value is made constant and the wire speed is controlled to give the processings such as tapering. For the electrolytic polishing bath, it is desirable to use a mixed bath comprising trivalent alcohol, perchloric acid and monovalent alcohol.The inventive method exerts an effect that the tapering can be given efficiently and yet with high precision compared with the traditional method of mechanical polishing or the method of dipping one by one batchwise into the electrolytic polishing bath.

Abstract: A method of manufacturing a superconductor includes the steps of filling a ceramic superconductor or a material mixture thereof in a metal container, elongating the metal container, slitting the metal container by a predetermined width to partially expose a material inside the metal container, and sintering the material inside the metal container.

Abstract: A low-temperature burnt conductive paste prepared by dispersing, in an organic vehicle, a base material comprising 50 to 95% by weight of a powder of at least one conductive material selected from the group consisting of a copper alloy, a copper oxide and a copper alloy oxide and 5 to 50% by weight of a glass powder having a softening point of 300.degree. to 600.degree. C. and a coefficient of thermal expansion of 6 to 13.times.10.sup.-6 .degree.C..sup.-1, and a method of manufacturing a printed circuit board using this paste.

Abstract: This invention relates to the method and apparatus for improving the cast ingot, cast in a continuous casting equipment which is commonly called a "belt-and-wheel" system wherein a casting wheel and a metallic belt are employed, by applying a light reduction to the cast ingot to give elongation under compressive stress during the process wherein the curvature of the cast ingot changes as the cast ingot travels from the exit of a casting wheel.More particularly, this invention relates to cast ingot quality improvement method and apparatus in a continuous casting which aims at preventing cracks which were liable to occur on the groove bottom side of the ingot cast by the said continuous process; similarly it also aims at crushing blow holes which tended to concentrate on the groove bottom side the cast ingot.

Abstract: In a water jet type underwater ground excavator wherein an underwater pump portion is carried on an excavator body including stabilizer sleds, an excavation portion protrudes downwardly and rearwardly under the excavator body, and water is delivered from the underwater pump portion to the excavation portion and then ejected from jet nozzles of the excavation portion so as to excavate the ground under water, an improvement by a sinker arm erected at a free end of the excavation portion in a manner to ascend and descend with upward and downward motions of the free end, whereby the stability of the excavator is enhanced. By joining to the sinker arm a brake equipment which suppresses the ascent thereof, the stability of the excavator is enhanced.