Sony Corporation

Fujikura Limited

Hiroshi Yamanouchi

Toru Takahashi

Michio Takaoka

Nobuyuki Sadakata

Osamu Kohno

Shotaro Yoshida

Motoyuki Ono

Yoshimitsu Ikeno

Tsuneaki Motai

Masakazu Hasegawa

Ryuichi Okiai

Mikio Nakagawa

Hidetoshi Kamoto

Shin'ya Aoki

Seigo Uehara

Toru Takamiya

Masayuki Tan

Toshio Niwa

Keiichiro Kataoka

Syotaro Yoshida

Mitsugu Kuji

Shogo Takahashi

Yoshimasa Gouda

A method of producing a superconducting cable or a coil including an A-B-C-D system superconductor where the A includes an element of group IIIa of the Periodic Table, the B an element of group IIa of the Periodic Table, C copper, D oxygen. A plurality of filaments are selected from a copper alloy filament including: a copper alloy filament including the A element; copper alloy filament including the B element; a copper alloy filament including both the elements the A and the B; a first metallic filament having particles of a copper oxide, copper halide or copper sulfide dispersed therein; a second metallic filament coated with an oxide layer; a copper filament containing the A element and having particles of a copper oxide, copper halide or copper sulfide dispersed therein; a copper filament containing the B element and having particles of a copper oxide, copper halide or copper sulfide dispersed therein; a third metallic filament containing the A element and coated with an oxide layer; a fourth metallic filament containing the B element and coated with an oxide layer; the first to fourth metallic filaments being substantially free of any component which provides an adverse effect on the production of the superconductor. The selected filaments are arranged to form element filaments bundle so that the superconductor is produced in a subsequent heat treatment. The bundle is drawn and then heated under an oxidizing atmosphere for producing the superconductor.

Method of producing oxide superconducting cables and coils using copper

In a magnetic recording device wherein a magnetic head is maintained in elastic contact with a recording medium, an improved magnetic head supporting device integrates a hinge, a swingably supported arm and a magnetic head holding member into a unitary flat spring member. Further, an elongate oil retaining bearing sleeve is provided to guide the magnetic head cartridge in the horizontal or radial direction relative to the recording medium.

Magnetic head supporting device

A recording and/or reproducing device for a disk enclosed in a cassette is disclosed. The device is comprised of a chassis, bearing members included in the chassis, a spindle mounted by these bearing members for rotation with respect to the chassis, a magnet holder mounted to the spindle, a rotor magnet mounted to the magnet holder and rotatable with respect to be chassis, a substrate affixed to the chassis, a stator coil mounted in the confronting relation to the rotor magnet on the base board, a turntable mounted to the upper part of the spindle, and a cassette holder mounted on the chassis and which is movable, for mounting the disk cassette to the turntable, between an inoperative position to be assumed when the disk cassette is inserted into or detached from the recording and/or reproducing device and an operative position to be assumed when the disk cassette is mounted on the turntable.

Recording and/or reproducing device for the flexible magnetic disk

In a loading device for disc cassettes, an engaged portion or recess of the disc cassette is engaged with a coupling member of the loading device, when the disc cassette is manually inserted to a first position in a cassette holder. In response to further slight insertion of the cassette to a second position, the disc cassette is automatically drawn-in to a predetermined third position through the coupling member by a motor which is driven in response to a signal produced by a sensor, and thereafter, the cassette holder is lowered from a cassette inserting position to a cassette loading position, so that the disc cassette can be always safely moved to its loading position without being inclined.

Loading device for disc cassettes

A DC power cable includes a conductor and an insulation of a thermoplastic resin formed around the conductor. The insulation contains carbon black in an amount of about 0.2 to about 5% of the total weight of the thermoplastic resin and the carbon black, and the ratio of mineral oil absorption (cc/100 g) to specific surface (m.sup.2 /g) in the carbon black is not less than 0.7. The carbon black has the hydrogen content of not more than 0.6% by weight. The specific surface is measured by BET equation. The carbon black has a particle size of 10 to 100 nm.

DC electric power cable

Tape dropouts are reduced, in a digital magnetic tape recorder having a tape length metering roller that provides running length information, by using specially arranged tape guide rollers that cooperate with the metering roller to define a V-shaped tape path to lessen the stresses imposed upon the magnetic tape and to minimize the extent that the tape wraps around the metering roller. The metering roller is arranged at the vertex of the V-shaped tape path with a wrap angle of about ninety degrees and by specifically arranging the guide rollers and the capstan-pinch roller on the tape recorder top plate the tape path length is reduced, thereby accommodating additional apparatus on the top plate.

Tape machine

Growing community of inventors

Tokyo, Japan

Hiroshi Yamanouchi