The invention concerns a splice for yarns, whether textile or otherwise, which is obtained by coupling tracts of single yarns by winding after having untwisted beforehand at least said tracts of single yarns, whereby the splice comprises, in at least one tract of the joint (22), a number of twists in the coupled yarn which is advantageously greater than the number of twists comprised in the single...

This invention relates to a procedure for splicing yarns, whether textile or otherwise, with a join made by coupling two single untwisted yarns and thereafter retwisting them, wherein the single yarns are untwisted beyond a substantially nil twist value and are then coupled and retwisted so as to impart to the single yarns a desired twist at least the same as the twist comprised in the original ya...

This invention concerns an improved splicer (10) to splice textile yarns mechanically, the splice being obtained by coupling two single untwisted yarns (70-71) and reapplying the twists thereafter, part of such single yarns (70-71) being untwisted until twists of a sign opposite to the original twists have been imparted, such part then being doubled and remaining tails (270-271) being obtained, th...

An improved process for the preparation of an expanded, water insoluble silicate aggregate. Anhydrous alkali metal silicate is hydrated in the presence of a curing agent, then is subjected to rapid thermal expansion. The process eliminates the use of liquid silicates, and the reaction is conducted in an essentially dry state. The expanded product has extremely low bulk density.

A liquid colorant for ABS resins is described, comprising 100 parts by weight of a pigment or dye and 25 to 2,000 parts by weight of a liquid polyester, and having a viscosity of 1,500 poises or less at room temperature. This liquid polyester is prepared mainly from an aliphatic dicarboxylic acid and a dihydric alcohol, and usually has a viscosity of 10 to 1,500 poises at room temperture. The liqu...

Metallic droplets in liquid, solid or partially solidified form are deposited onto a substrate to produce cast or coated articles by utilizing the Coanda Effect to draw one stream of gas toward another stream of gas flowing over a surface and introducing molten metal between the two gas streams such that the molten flow is broken into droplets. In the embodiment primary fluid flows through slit 50...

PURPOSE:To prevent the reduction of the metallic oxide powder in the sintering of the powder by filling a material powder including a metallic oxide powder in a metal tube, removing the tube body of the metal tube while sintering the material powder after a wire extending process, and cooling gradually after the sintering process. CONSTITUTION:When a material powder including an oxide powder of a ...

PURPOSE:To make it possible to carry out the power transmission and the data transmission simultaneously by mixing specific elements and Cu in a specific ratio, heating and melting to alloy the mixture at a temperature of the melting point or more of an element whose melting point is the lowest in the component elements of the mixture, and then heat-treating to make into an oxide. CONSTITUTION:The...

PURPOSE:To produce the title ceramic having uniform characteristics stably in high yield by crushing and oxidizing a mixture of plural kinds of powdery metal oxides, then sintering after forming the mixture by compression. CONSTITUTION:After inserting a vessel 6 contg. a mixture 16 of plural kinds of powdery metal oxide and alumina balls 15 into a cylindrical furnace 1 to a shallow depth, the vess...

PURPOSE:To obtain the title superconductor having high purity, high critical current density, and high critical temp. by subjecting a ceramic superconductor to a specified treatment. CONSTITUTION:When a ceramic superconductor consisting of an element of the group IIa of the periodic table, an element of the group IIIa of the periodic table, Cu and O is transformed from tetragonal crystal system to...

PURPOSE:To improve the critical temperature and the superconductive property by forming a core material in a specific shape, and covering the core material with a superconductive coverage layer. CONSTITUTION:A core material is formed in a specific shape beforehand, and the specific shape of core material is covered with a superconductive coverage layer which consists of a superconductive material....

PURPOSE:To make it possible to bear an extreme temperature variation sufficiently and to obtain a perfect single crystal of superconductor by placing a single crystal intermediate layer which indicates an intermediate value of physical properties such as the thermal expansion coefficient and the lattice constant between a base material and a superconductor. CONSTITUTION:Over the surface of a base ...

PURPOSE:To prevent the unevenness of critical temperature by furnishing a single crystal of an oxide superconductor over the surface of a base material. CONSTITUTION:On the periphery of a linear body (base body) 1, an oxide type superconductor 2 is formed. As the material of the linear body 1, a polycrystal metal of such as Pt, Cu, Ag, and Au or its alloy, an amorphous material such as an amorphou...

PURPOSE:To make it possible to form a membrane in a high speed, and to obtain a reliable superconductive membrane of a high density and a good mechanical property, by forming the membrane in a DC spattering. CONSTITUTION:A DC spattering is applied with Ar including Ar and O2, Kr including O2N2, He gas including O2, of the like. Since the compositions of the membrane and the target are different ge...

PURPOSE:To enable a static hydraulic extrusion process in a stable condition along the whole length of a multicore structure superconductive wire by contracting the diameter of the front end member toward the front side of an extrusion billet while contracting the diameter of the rear end member also toward the front side of the extrusion billet. CONSTITUTION:After covering both ends of a tube 6 c...

PURPOSE:To make it possible to operate in a high temperature by inserting a material powder in a metallic tube to form a composite, and giving a section- reducing process to it. CONSTITUTION:Material powders of a hydroxide BaCO3 and oxides of Y2O3 and CuO, which get superconductibility by a heat-treatment, and which is mixed to make an oxide of the oxide composition ratio (BaY)2 CuO4, are stirred ...

PURPOSE:To make it possible to manufacture a superconductive wire material of a high critical temperature Tc and an even composition by vacuum evaporating an oxide including Ba, Y, and Cu at a metallic inner wall, and forming a membrane of a perovskite structure oxide over the inner wall. CONSTITUTION:By carrying out a vacuum evaporation by using a mixture or an alloy including Ba, Y, and Cu as th...

PURPOSE:To prepare effectively a superconductive material having oxygen vacancy in perovskite crystal structure in a short time by grinding down a powder mixture consisting of an inorg. salt of Ba, CuO, and an inorg. salt or a rare earth element admixed with an org. solvent, calcining the ground product under specified conditions, then carrying out final calcination and oxygen treatment. CONSTITUT...

PURPOSE:To produce a superconductive material having oxygen vacancy in perovskite type crystal structure effectively in a short time by grinding down a powder mixture consisting of an inorg. salt of Ba, CuO, and an inorg. salt of a rare earth element admixed with an org. solvent, then carrying out calcination and oxygen treatment under specified conditions. CONSTITUTION:Each specified amt. of an i...

PURPOSE:To provide inexpensively the title superconductive material having small porosity, high density, and high critical current density, exhibiting superconductivity at the b.p. of liquid N2 by using yttria concentrate in place of Y2O3 in the stage of producing a superconductive material consisting of a Y-Ba-Cu type oxide. CONSTITUTION:1mol. yttria concentrate is mixed with 4mol. BaCO3 and 6mol...