Hitachi, Ltd.

Hitachi Cable, Inc.

Shin-etsu Chemical Co., Ltd.

Hideki Asano

Shuji Eguchi

Noriaki Taketani

Seikichi Tanno

Masahiko Ibamoto

Tomiya Abe

Toshikazu Narahara

Masanori Nemoto

Motoyo Wajima

Akio Nishikawa

Junji Mukai

Yoshiaki Okabe

Akira Endo

Kunio Miyashita

Hiroyoshi Kokaku

Masatsugu Ogata

Tohru Koyama

Hideki Nihei

Toru Koyama

Hiromu Terao

Yoshinori Hida

Shohei Kozakai

Hajime Yokota

Masato Shimura

Morimichi Umino

Takamasa Hori

Yuuetsu Takuma

Yukio Shimazaki

Kenichi Saida

Katsuhito Suzuki

Yoshimitsu Mihara

Yukihiko Takada

Tsuneo Narusawa

Tuneo Narusawa

A composition comprising (a) an organopolysiloxane having a unit of the formula: RSiO.sub.3/2 wherein R is a substituted or unsubstituted monovalent C.sub.1-10 hydrocarbon group in its molecule and having at least 0.05 alkenyl groups each directly attached to a silicon atom per silicon atom, (b) an organohydrogenpolysiloxane having at least 2 hydrogen atoms each directly attached to a silicon atom per molecule, and (c) a platinum catalyst, maintains good light transmission in cured form when exposed to humidity or stresses and is thus suitable for forming cores of optical fibers.

Optical fibers and core-forming compositions

A polymer having dihydropyridine rings or dihydrotriazine rings as main constitutional units, an ethynyl- or cyanato-terminated Schiff's compound which is a starting material for producing the polymer, and applications of the polymer.

Polymer having dihydropyridine rings or dihydrotriazine rings, process

A plastic optical fiber comprising a core and a clad, said core being formed by an amorphous and optically transparent polymer and said clad being formed by a polymer having a refractive index lower than that of the core by at least 0.3%, at least one of the core and the clad being formed by an amorphous and optically transparent polymer containing metal elements and halogen atoms, is low in light loss and excellent in heat resistance.

Plastic optical fibers from polymers derived from metallic salts of

An optical part for light transmission comprises a light conductor formed of a core of a transparent material and a clad of a material having a smaller refractive index than that of the core material, and a light emitting and/or receiving element, wherein the light emitting and/or receiving element is integrally combined with the core of the light conductor by a same material as the core material or by a material having a same refractive index as that of the core material and having a greater rigidity than that of the material forming the clad and/or jacket. The optical part can be used in a high temperature environment as well as a room temperature environment without involving any appreciable loss in light transmission.

Optical part including integral combination of optical fiber and light

The A phase stator and the A phase stator are opposed each other winding same phase coil thereat. The B phase stator and the B phase stator are opposed each other winding same phase coil thereat. The A phase stator and the A phase stator, and the B phase stator and the B phase stator sandwich the mover, respectively. The mover fixes the permanent magnets having small magnetized pitch on the both surfaces thereof. The permanent magnets on both surfaces of the mover comprises the first permanent magnets and the second permanent magnets. The first permanent magnets having one polarity and a predetermined interval each other along the longitudinal direction of the mover are fixed previously on the mover. The second permanent magnets are inserted to the intervals on the mover.

Permanent magnet type linear pulse motor

There are disclosed a nitrile-terminated Schiff compound represented by the formula X--Z--Y--C.tbd.N).sub.m (I) wherein n is 1 or 2, Z is --CH.dbd.N-- or --N.dbd.CH-- and Y is a divalent organic group such as phenylene and the like, and X is the same as Y when n=2 or H, lower alkyl group etc. when n=1; polymers obtained by polymerizing said Schiff compound alone or together with other monomers, and a process for preparing such a polymer therefrom.

Polymer from nitrile terminated compounds having Schiff bonds and

There is provided a resinous optical transmitting element in which a core, through which light is transmitted, is formed into a predetermined non-linear configuration, and a cladding lower in refractive index than the core is in close contact with the core. A method of manufacturing the optical transmitting element comprises the steps of polymerizing polymeric material forming the core, within a mold having a predetermined non-linear cavity, subsequently removing the mold, and forming the cladding about the core. The resinous optical transmitting element obtained by the method can be formed into a selected one of various configurations in compliance with the purpose. In addition, the resinous optical transmitting element is less in distortion, making it possible to reduce the transmission loss.

Method of molding a resinous optical transmitting element

This invention comprises unifying circuits with a base on which mechanical parts are mounted and relates to a mechanical part mounting chassis provided with a substrate and a circuit buried in the substrate and/or spread out on the substrate surface.

Mechanical part mounting chassis with integrated circuit

A molded part including a metal plate formed with a plurality of through holes, a plurality of resin portions connected to a resin filled in the through holes and protruding on opposite sides of the metal plate, the resin portions having a planar cross section larger than a cross section of the through holes, and a plurality of resin components each integrally formed with one of the resin portions. The resin components are secured in place on the metal plate separate from and independent of each other by virtue of residual thermal stress produced by the difference in the coefficient of thermal expansion between the resin portions and the metal plate in such a manner that a radially oriented residual thermal stress in each resin portion is symmetrical with respect to a center axis of one of the resin components.

Molded part and method of making the same

A plurality of optical guide paths are built in a guide path plate. A plurality of optical guide posts are erected on the guide path plate so that each may oppose to one end of the corresponding optical guide path. The other end of at least one of the optical guide paths is optically connected to a light projecting portion, and the other end of at least another of the optical guide paths is optically connected to a light receiving portion. A part to-be-sensed which is movable is located between the distal ends of the optical guide posts whose base ends are connected to the corresponding optical guide paths. The presence of the part to-be-sensed is detected in such a way that the part to-be-sensed interrupts or transmits light which passes between the distal ends of the optical guide posts.

Photosensor employing optical guide posts to detect an object in the path

A transparent resin material containing metallic atoms (except for alkali metals) which are ionic-bonded to a vitreous polymeric material constituting the substance of said resin material, in an amount of at least 8% by weight based on the total weight of the resin material, said resin material having a transparency of at least 80% in terms of a light transmittance, and a refractive index n.sub.D.sup.25 of at least 1.55.

Transparent resin material containing metallic atoms bonded to pendent

A chassis for video tape recorder molded integrally with a fiber-reinforced plastic composition is light in weight and can meet the requirements for attainment of high precision. It is possible to obtain a chassis with even higher precision and higher rigidity while preventing deformation with time as well as creep deformation, by properly selecting the components of the composition, the number and the position of the gates, and/or the reinforcing measures. In case of using glass fiber as the reinforcing fiber component of the composition, it is desirable to use the type in which 5% by weight or more of the whole glass fiber component is occupied by those glass fibers which have a length of over 1.0 mm and a diameter of 15 .mu.m or less.

Chassis for video tape recorder

Precision machinerycomponents such as a cylinder in a magnetic tape scanning apparatus, a cylinder base and/or a sub-chassis in a video tape recorder, etc. made of cured thermosetting resin composition comprising (A) a resin component comprising, particularly preferably, a terephthalic acid series unsaturated polyester resin, styrene and a saturated polyester resin, (B) an inorganic filler, and (C) short fibrous material such as carbon short fibers, have excellent dimensional accuracy and dimensional stability. When these precision machinery components are used, for example, in a video tape recorder, the same clear VTR picture as in the case of using those made of metal can be obtained.

Precision machinery component

The present invention provides polypropylene resin compositions of excellent gloss, impact resistance and rigidity comprising (A) 100 parts by weight of propylene homopolymer having an intrinsic viscosity in tetraline at 135.degree. C. of no less than 1.9, (B) 40-150 parts by weight of ethylene/propylene copolymer having an intrinsic viscosity in tetralin at 135.degree. C. of 1.4-1.7 and an ethylene content of 2-15 molar % and (C) 40-150 parts by weight of ethylene/propylene copolymer having an intrinsic viscosity in tetralin at 135.degree. C. of no less than 1.9 and an ethylene content of 2-20 molar % or comprising above components (A) through (C) and (D) 5-120 parts by weight of a powdery inorganic filler of an average particle diameter of no more than 0.8 .mu.m, and moldings, i.e. molded articles, prepared from these compositions.

Growing community of inventors

Mito, Japan

Hideki Asano