Mitsubishi Denki Kabushiki Kaisha

Kazuharu Kato

Tadaki Murakami

Shinji Yamagata

Hiroshi Adachi

Fumiaki Baba

Takao Mitsuhashi

Kazunori Fukuya

Kenichi Nishina

Shunichi Katsube

Itsuo Nishiyama

Shoji Yamaguchi

Osamu Hiroi

Mitugu Takahasi

Hiroyuki Hama

Hiroyuki Nishimura

Hirofumi Fujioka

Hiromi Ito

Kazuo Okahashi

Hitoshi Yamazaki

Mitsugu Takahashi

Hirotaka Muto

Kenji Mimura

Yukio Ozaki

Satoru Yamasaki

Takao Takeda

Takashi Shirazawa

Toshinori Kimura

Haruhisa Fujii

Tosikazu Uemoto

Kiyoshi Takata

A switch having a molded article of which the entirety or a part is composed of an organic and inorganic complex composition is provided, wherein the base inside of the base of a box is composed of for example an organic and inorganic complex composition with the resin content at 15 to 70 wt % and the content of one or more inorganic compounds capable of dehydration at 150&deg; C. or more at 80 to 30 wt %.

Organic and inorganic complex compound and switch using same

There is provided an epoxy resin composition, which has superior resistant property to SF gas, mechanical strength and cracking resistance in a well balanced manner and which can provide an insulating molded article having a low dielectric constant. The epoxy resin composition for an SF -gas insulating device of the present invention is obtained by adding a silicate compound powder to an epoxy resin.

Epoxy resin composition for SF6 gas insulating device and SF6 gas insulating device

A switch containing a switch case, contacts adapted to be opened and closed, an arc extinguishing chamber disposed in the vicinity of the contacts, and an arc extinguishing material capable of reducing the amount of metal particles and free carbons to be scattered from components disposed within the switch by an arc generated when the contacts are opened or closed or capable of insulating the metal particles and the free carbons to convert into an insulator, thereby inhibiting a decrease in arc resistance expected to occur upon the generation and extinction of the arc and a decrease in insulation resistance expected to occur within and around the arc extinguishing chamber and at inner wall surfaces of the switch case upon and after the extinction of the arc. The switch is applicable to a switch expected to generate an arc upon interruption of electric current flowing therethrough such as a circuit breaker, current-limiting device or electromagnetic contactor and is capable of immediately extinguishing the arc and inhibiting the decrease in insulation resistance within and around the arc extinguishing chamber and at inner wall surfaces of the switch case.

Switch and arc extinguishing material for use therein

A circuit board includes an insulating substrate having opposed first and second surfaces and a thickness; and first and second conductive layers disposed on the first and second surfaces of the insulating substrate, respectively, wherein the first conductive layer has an end surface projecting outwardly from the first conductive layer in a direction generally parallel to the first surface of the insulating substrate, and a contact surface in contact with the insulating substrate and joining the end surface at a junction, wherein the end surface is spaced from the first surface of the insulating substrate except at the junction.

Circuit board with conductor layer for increased breakdown voltage

A switch comprising a switch case, contacts adapted to be opened and closed, an arc extinguishing chamber disposed in the vicinity of the contacts, and an arc extinguishing material capable of reducing the amount of metal particles and free carbons to be scattered from components disposed within the switch by an arc generated when the contacts are opened or closed or capable of insulating the metal particles and the free carbons to convert into an insulator, thereby inhibiting a decrease in arc resistance expected to occur upon the generation and extinction of the arc and a decrease in insulation resistance expected to occur within and around the arc extinguishing chamber and at inner wall surfaces of the switch case upon and after the extinction of the arc. The switch according to the present invention is applicable to a switch expected to generate an arc upon interruption of electric current flowing therethrough such as a circuit breaker, current-limiting device or electromagnetic contactor and is capable of immediately extinguishing the arc and inhibiting the decrease in insulation resistance within and around the arc extinguishing chamber and at inner wall surfaces of the switch case.

Mica-containing ceramic composite having excellent characteristics such as capability of machining work, a small thermal expansion coefficient, high heat-shock resistant temperature difference as well as high heat deformation temperature, is prepared by: a) preparing powder mixture by blending 20 to 50% by weight of mica powder, 15 to 40% by weight of zinc oxide powder, 10 to 20% by weight of silica powder, 8 to 20% by weight of boric acid powder, and 4 to 20% by weight of cordierite powder; b) heating the powder mixture at a temperature of from 940.degree. C. to 1,050.degree. C. to prepare baked product; c) pulverizing the baked product into very fine powder to thereby obtain a shaping material; d) adding an organic binder to the shaping material to prepare a shaping composition; and e) shaping the shaping composition into a shaped body and heating a shaped body at a temperature ranging from 940.degree. C. to 1,050.degree. C. with simultaneous application of pressure to the shaped body to render the same into a baked body.

Process for preparing mica-containing ceramic composite

A method for producing an air-tight, heat-resistant plate for a particular use in manufacturing bulbous fluorescent lamp, which comprises: preparing a shaping material by mixing an inorganic filler composed of alumina powder and silica powder in a specified compositional ratio, and glass powder having a thermal expansion coefficient of 8.5 to 11.5.times.10.sup.-6 /.degree.C., both inorganic filler and glass material being blended at a predetermined ratio then, forming the shaping material into a shaped product of any desired configuration by a known shaping method; thereafter heating this shaped body to a temperature, at which the glass powder used becomes molten and fused, thereby rendering it to be a burned body.

Method for producing air-tight, heat-resistant plate

Growing community of inventors

Amagasaki, Japan

Kazuharu Kato