Kokusai Denshin Denwa Kabushiki Kaisha

Mishima Kosan Co., Ltd.

Toshihiko Kobayashi

Tetsusaburo Kamibayashi

Yoshinori Mimura

Nobutake Imamura

Satoshi Ichioka

Shinjiro Takeuchi

Tetsusaburo Kanbayashi

Yukinori Matsushima

A coordinate reader comprising: a magnetostrictive plate, a plurality of excitation means each including at least three coils mounted on the magnetostrictive plate in two directions of coordinate axes along its marginal edges for generating magnetostrictive oscillation waves in the magnetostrictive plate, a detection coil employed to be placed at a desired position on the propagation paths of the magnetostrictive oscillation waves, and measuring means for obtaining a numerical value of the coordinates of the position of the detection coil from a time difference between the excitation of the magnetostrictive plate by the excitation means and the detected output from the detection coil. Adjusting means is provided for adjusting the measuring means so that when the detection coil is disposed on the magnetostrictive plate at each position equally spaced from each of the coordinate axes, substantially equal numerical values are obtained from the excitation means.

Coordinate reader using adjustable magnetostrictive oscillations

A co-ordinate plate for a co-ordinate reader, which utilizes delays of oscillation waves in a magnetostrictive material. The co-ordinate plate is composed of two sheets of magnetostrictive material, which have a common co-ordinate plane and an acoustically insulating sheet therebetween, and in which propagation characteristics of the magnetostrictive oscillation waves are approximate to each other in a direction of a first line formed, on the co-ordinate plane, by the loci of many points having the same one of the two components of their co-ordinates and in a direction of a second line formed, on the co-ordinate plane, by the loci of many points having the other same component of the two components of their coordinates. Two exciting coils are provided for producing magnetostrictive oscillation in the thin plate of magnetostructive material in the directions of the first and second lines. Flux keepers are further provided for shielding magnetix fluxes emanating from the exciting coils.

Magnetostrictive co-ordinate plate for co-ordinate reader

A magnetic transfer record film employed for magneto-optically reading magnetic record patterns. The magnetic transfer record film is formed, as the principal component, of an alloy of a heavy rare earth metal and a transition metal and has an easy axis of magnetization in a direction perpendicular to the film surface and further has an alloy composition included in a range of .+-.10% at the periphery of a center alloy composition where the saturation magnetic moment becomes minimum with respect to a change of the composition within a temperature range used. The magnetic transfer record film is deposited on a transparent substrate and positioned closely to a magnetic record medium on which a magnetic record pattern to be observed is stored, so that the magnetic record pattern is transferred to the magnetic transfer record film. An optical system is provided to magneto-optically read out the transferred magnetic record pattern from the magnetic transfer record film.

Magnetic transfer record film and apparatus for magneto-optically

A code generator which has a plurality of selectable areas on an information plane of an information plate formed with a magnetostrictive material. At least one exciting winding is wound on the information plate at one end thereof for causing at least one magnetostrictive oscillation wave in the magnetostrictive material. A plurality of detecting windings are arranged on the information plate in parallel with the exciting winding to divide the information plane into a plurality of small areas. An information designating detector is pressed against a desired one of the plurality of the small areas. Coded information indicative of a desired one of the small areas is obtained in correspondence to the number of output pulses induced from the plurality of detecting windings until a detected pulse is obtained from the information designating detector by the magnetostrictive oscillation wave resulting from pulse excitation by the exciting winding and propagated in the magnetostrictive material.

Code generator

A magnetic head for reading out the state of magnetization recorded on a magnetic recording medium, in which the magnetic head comprises a substrate of insulating material, an amorphous magnetic thin film, a pair of current terminals, and a pair of voltage terminals. The amorphous magnetic thin film is deposited on the substrate so as to have a width smaller than respective unit areas of magnetic records on a magnetic recording medium to be separately read out therefrom and to have an easy axis of magnetization in a direction perpendicular to the film surface. The current terminals are formed on the substrate for flowing a current in the amorphous magnetic thin film in the lengthwise direction thereof. The voltage terminals are formed on the substrate for deriving from the amorphous magnetic thin film a voltage induced in the transverse direction thereof.

Thin film magnetic head

A magneto-optical memory medium having an easy axis of magnetization perpendicular to the medium surface. The memory medium is formed by an amorphous Dy-Fe system alloy film containing 18 to 28 atom % Dy.

Magneto-optical memory medium

A co-ordinate plate for a co-ordinate reader, which utilizes delays of oscillation waves in a magnetostrictive material. The co-ordinate plate is composed of a thin plate of magnetrostrictive material having a co-ordinate plane and similar propagation characteristics of magnetostrictive oscillation waves in directions of at least two co-ordinate axes of the co-ordinate plane, two exciting coils for producing magnetostrictive oscillation in the thin plate of magnetostrictive material in one and the other of co-ordinate directions of the co-ordinate plane, and flux keepers for shielding magnetic fluxes emanating from the exciting coils.

Co-ordinate plate for co-ordinate reader

A magnetic transfer record film employed for magneto-optically reading magnetic record patterns. The magnetic transfer record film is formed, as the principal component, of an alloy of a heavy rare earth metal and a transition metal and has an easy axis of magnetization in a direction perpendicular to the film surface and further has an alloy composition included in a range of .+-. 10% at the periphery of a center alloy composition where the saturation magnetic moment becomes minimum with respect to a change of the composition within a temperature range used. The magnetic transfer record film is deposited on a transparent substrate and positioned closely to a magnetic record medium on which a magnetic record pattern to be observed is stored, so that the magnetic record pattern is transferred to the magnetic transfer record film. An optical system is provided to magneto-optically read out the transferred magnetic record pattern from the magnetic transfer record film.

Magnetic transfer record film

Continuous soldering of small elements along a line is achieved by a radiant beam spot lamp which moves intermittently along the line, and radiant energy is supplied only while the lamp is stopped to form partially overlapped heating zones.

Method of continuously soldering small elements arranged generally in a

A word arrangement matrix memory of high bit density having a flux keeper is known in which a number of word lines provided on a flux keeper plate are mounted on the surface of a substrate on which a number of digit lines of magnetic strips each comprising a conductive strip coated with at least one ferromagnetic thin film is provided. In accordance with this invention, the digit lines comprises a plurality of straight sections disposed in parallel at regular spaces, corresponding digit lines of the respective sections being interconnected to one another in series or in parallel. The flux keeper plate has, on the surface facing the said surface of the substrate, a number of parallel column grooves facing the sections of the digit lines and a number of parallel row grooves intersecting at right angles with the column grooves. The word lines comprise a plurality of X lines and a plurality of Y lines, the X lines and the Y lines being arranged so that only a group of memory cells on one of the digit line sections facing a position of the column grooves is selected by current coincidence selection of one of the X lines and one of the Y lines.

Growing community of inventors

Mitaka, Japan

Toshihiko Kobayashi