Daido Tokushuko Kabushiki Kaisha

Nissan Motor Company Limited

Daido Steel Co., Ltd.

Nagoya Institute of Technology

Sumitomo Electric Industries, Limited

Shinichiro Yahagi

Takanobu Saito

Hiroyuki Aoki

Akihiko Saito

Masayoshi Umeno

Shiro Sakai

Atsushi Yoshida

Kenji Miyazaki

Itaru Shibata

Munekatsu Shimada

Makoto Saito

Norio Yoshikawa

Mikiya Shinohara

Yasuaki Kasai

Hiyoshi Yamada

Masashi Mizuno

Takayoshi Shimizu

Shinichi Kitamura

Satoshi Takemoto

Masaru Nagata

Michiharu Ogawa

Teruo Watanabe

Kazuhisa Tsutsui

Yutaka Yoshida

Toshiya Kinami

Haruo Koyama

Shigeo Hanashima

Nobuyuki Matsui

Toshiaki Yashiro

Keisuke Awazu

Osamu Kato

Tamotsu Nishinakagawa

A magnetic mixture comprising at least two kinds of powders which are uniformly mixed with each other. Each powder exhibits a significant magnetic property when its constituent elements have a predetermined composition ratio. Magnetic properties of each powder are retained in the magnetic mixture which exhibits, as a whole, a soft magnetic property. The magnetic mixture is useful as a raw material for a powder magnetic core.

Magnetic mixture

In a core material for the noise filter, powders of a flat and soft magnetic material is dispersed and buried into an insulating material such as rubber or plastic.

Core material for noise filter

An INVAR.RTM. or iron nickel alloy or iron nickel cobalt alloy wire has an area ratio of carbide existing at the grain boundaries of the wire in the finished wire of at most 4%, or an average grain size in the transverse direction within a range of 1 to 5 .mu.m. Such a wire has a superior twisting property.

Iron alloy wire and manufacturing method

An electromagnetic stainless steel consists essentially of not more than 0.015 wt % of C, not more than 3.0 wt % of Si, not more than 0.5 wt % of Mn, not more than 0.030 wt % of P, not more than 0.030 wt % of S, 4-20 wt % of Cr, 0.2-7.0 wt % of Al, 0.02-0.50 wt % of Bi and the remainder being Fe and inevitable impurity and has excellent magnetic properties, electric resistance, cold forgeability and machinability.

Electromagnetic stainless steel

A contact member according to the invention effectively controls the production of sparks even at a high current, has a simple structure and is appropriate for use as a small contact brush as in a micromotor. A method of manufacturing a strip material for producing the contact member, the strip material being provided with a surface metal layer having a desired configuration which can be easily manufactured continuously, precisely and in large quantities with a high yield of contact members. Each of the contact members comprises a metal base plate and a sintered metal layer formed on a surface of the metal base plate. The contact member is cut from the strip material, which is manufactured by first printing a metal paste on desired positions on a metal base strip and then sintering the metal paste. The sintered metal layer is firmly joined to the metal base strip by diffusion bonding.

Contact member with composite sintered metal paste strip having 1-5 wt %

To obtain stable linear torque-output characteristics over a wide torque range in a magnetostrictive torque detecting apparatus having a shaft to be measured, an exciting coil for magnetically exciting the shaft, and a detecting coil for detecting magnetostrictive components generated in the shaft distorted by a torque, the shaft is particularly composed of a substrate shaft portion made of a high yield point material and a shape anisotropic layer portion made of a high magnetostrictive material metallographically welded on an outer surface of the substrate shaft. The welded shape anisotropic layer portion is formed with two symmetrical groups of concave/convex portions each arranged at regular angular intervals on the outer circumferential surface thereof at an inclination angle with respect to the axial direction of the shaft.

Magnetostrictive torque detecting apparatus

A torque sensor provides a specific property for a shaft member so as to improve sensitivity and so as to minimize hysteresis in measurement of the torque exerted thereon. The shaft member is provided specific composition achieving the desired level of sensitivity without increasing the hysteresis. In the alternative, the shaft member is processed in order to provide the desired property.

Torque sensor

A torque detecting device has a measuring shaft, an excitation device and a detector for detecting a magnetostriction passing through said measuring shaft. The device is able to measure the torque with accuracy even if a temperature gradient is produced in the axial direction of the measuring shaft by making the measuring shaft from a material having specified electromagnetic characteristics at least in a part in which said magnetostrictive force is detected.

Torque detecting device

A method for producing an anisotropic rare earth magnet is improved by applying compressing stress on a free surface of an compacted material at the time of extruding the compacted material in order to prevent forming cracks, and improved by using a double action punch provided with a core punch and a sleeve punch so as to mold a compacted material and extrude the compacted material into the anisotropic magnet material in a single heat process continuously.

Method and apparatus for producing anisotropic rare earth magnet

A semiconductor wafer having an epitaxial GaAs layer, including a monocrystalline Si substrate having a major surface which is inclined at an off angle between 0.5.degree. and 5.degree. with respect to (100); and at least one intermediate layer epitaxially grown on the major surface of the monocrystalline Si substrate, as a buffer layer for accommodating a lattice mismatch between the Si substrate and the epitaxial GaAs layer which is epitaxially grown on a major surface of the top layer of the at least one intermediate layer. The at least one intermediate layer may comprise one or mor GaP/GaAsP, GaAsP/GaAs superlattice layers. the wafer may be used to produce a seimconductor light emitting element which has a plurality of crystalline gaAs layers including a light emitting layer epitaxially grown on the GaAs layer on the intermediate layer. The wafer may also be used to produce a compound semiconductor device such as amplifying and switching elements, light emitting and receiving elements and photovolataic elements. Methods for producing the semiconductor wafer, light emitting element and compound semiconductor devices are also disclosed.

Method of making an epitaxial gallium arsenide semiconductor wafer using

A semiconductor wafer having an epitaxial GaAs layer, including a monocrystalline Si substrate having a major surface which is inclined at an off angle between 0.5.degree. and 5.degree. with respect to (100); and at least one intermediate layer epitaxially grown on the major surface of the monocrystalline Si substrate, as a buffer layer for accommodating a lattice mismatch between the Si substrate and the epitaxial GaAs layer which is epitaxially grown on a major surface of a top layer of the at least one intermediate layer. The at least one intermediate layer may comprise one or more GaP/GaAsP, GaAsP/GaAs superlattice layers. The wafer may be used to produce a semiconductor light emitting element which has a plurality of crystalline GaAs layers including a light emitting layer epitaxially grown on the GaAs layer on the intermediate layer. The wafer may also be used to produce a compound semiconductor device such as amplifying and switching elements, light emitting and receiving elements and photovolataic elements. Methods for producing the semiconductor wafer, light emitting element and compound semiconductor devices are also disclosed.

Epitaxial gallium arsenide semiconductor on silicon substrate with

A torque detecting device has a measuring shaft and a magnetic circuit incorporating the measuring shaft into a magnetic path which includes a device for detecting a magnet-ostrictive force passing through said measuring shaft. The device is able to increase the output sensitivity, decrease the rotative fluctuation of output and decrease the hysteresis by making the measuring shaft forming the magnetic path from an iron base alloy having a specific composition.

Growing community of inventors

Ohbu, Japan

Shinichiro Yahagi