Abstract: A magnetoresistive element includes a first antiferromagnetic film, a first magnetic film having a magnetization direction fixed by magnetic coupling with the first antiferromagnetic film, a second antiferromagnetic film, a second magnetic film having a magnetization direction fixed by magnetic coupling with the second antiferromagnetic film, a third magnetic film having a magnetization direction able to rotate in response to an applied magnetic field, a first nonmagnetic film disposed between the first magnetic film and the third magnetic film, and a second nonmagnetic film disposed between the second magnetic film and the third magnetic film. The third magnetic film is disposed between the first nonmagnetic film and the second nonmagnetic film, the first magnetic film is disposed between the first antiferromagnetic film and the first nonmagnetic film, and the second magnetic film is disposed between the second antiferromagnetic film and the second nonmagnetic film.

Abstract: A thin film magnetic head and a disk storage system having a magnetic disk and the thin film magnetic head provided on a floating type slider. The thin film magnetic head has an upper magnetic core and a lower magnetic core, wherein the upper magnetic core and the lower magnetic core are made of an electroplated thin film having sufficient average crystal grain size. The upper magnetic core is made of a Ni—Fe alloy having Ni of 38 to 60 wt % and Fe of 40 to 62 wt %, and the crystal grain size is smaller than 500 Å.

Abstract: A magnetic storage/read system includes a recording medium having tracks, and a magnetic head, including a magnetoresistive element, which reads a magnetic field from the recording medium. The magnetic storage/read system satisfies a relationship of d≦(12.5×103)/Tr where d is a height, expressed in &mgr;m, of the magnetoresistive element in a direction perpendicular to a plane of the recording medium, and Tr is a track density, expressed in tracks per inch, of the tracks of the recording medium.

Abstract: A stratospheric airship capable of substantially and smoothly varying the volume of a buoyant gas is provided so as to allow the airship to stably ascend into the stratosphere and keep a station therein. A stratospheric airship includes a gas envelope defined by a ship hull, the gas envelope being divided by a diaphragm into a buoyant gas compartment containing a buoyant gas and an air compartment containing air, the stratospheric airship being allowed to ascend by varying the volume ratio between the buoyant gas and the air, wherein the periphery of the diaphragm is coupled to the ship hull generally at the midpoint along the vertical dimension thereof, and a central portion of the diaphragm is coupled to a suspension chord whose upper and lower ends are coupled respectively to the upper and lower surfaces of the ship hull. The sloshing phenomenon of the diaphragm is suppressed, whereby the change in the shape thereof is balanced, and thus there is no asymmetric distribution of the buoyant gas.

Abstract: A magnetic head includes a magnetoresistive element. The magnetoresistive element includes a first magnetic film having a fixed magnetization direction, a second magnetic film having a fixed magnetization direction, a third magnetic film having a rotatable magnetization direction, a first nonmagnetic film, and a second nonmagnetic film. The first magnetic film, the first nonmagnetic film, the third magnetic film, the second nonmagnetic film, and the second magnetic film are stacked in this order.

Abstract: A magnetic film having a high saturation magnetic flux density larger than 1.5 T and a resistivity larger than 40 .mu..OMEGA..cndot.cm is fabricated through an electroplating method using (40-60)Ni-Fe and by adding Co, Mo, Cr, B, In, Pd or the like to the (40-60)Ni-Fe. Thereby, it is possible to obtain a recording head capable of performing sufficient recording in a high frequency range and to obtain a disk storage system with a high recording density which has a transfer rate higher than 15 MB/s, a recording frequency higher than 45 MHz and a rotating speed of a magnetic disk higher than 4000 rpm.

Abstract: A microwave oven including a defrosting step in which a target which must be heated is irradiated with microwaves which are irregular in terms of time at least when the phase of water in the target is shifted from a solid body to liquid. The microwave oven includes a magnetron for generating microwaves for dielectrically heating a target which must be heated; and a waveguide through which microwaves generated by the magnetron are propagated into a heating chamber, wherein a defrosting process is performed in such a manner that microwaves which are irregular in terms of time and which are in a chaos state are propagated through the waveguide at least when the phase of water in the target is shifted from a solid body to liquid.

Abstract: In order to prevent degradation of the recording performance during radio frequency recording, and to provide a thin film magnetic head and a recording reproducing sectional pattern magnetic head which has a magnetic pole width less than 2 .mu.m and an ultra high density magnetic storage apparatus of 10 Gb/ in.sup.2 grade, a recording head is provided in which a lower part magnetic film serves as a shielding film of a reproducing selection, a non magnetic gap film is formed during formation of the upper part magnetic film and the lower part magnetic film, one part of the lower part magnetic film or the upper part magnetic film has a higher resistivity of more than 80 .mu..OMEGA.cm than other parts, the upper part magnetic film is formed by flame galvanizing, and a gap section of the lower part magnetic film or the upper part magnetic film has a convex shape.

Abstract: In a thermal printer, a continuous paper cutting device has an upper and a lower separator located downstream of a platen in the intended direction of paper transport and positioned to face each other with the intermediary of a continuous paper. The upper and lower separators are each provided with an arcuate end in place of a sharp edge for cutting the paper. The paper is formed with notches at opposite ends of each perforation. When a peforation immediately following the printed part of the paper reaches a predetermined position downstream of the arcuate ends of the separators in the direction of paper transport, the paper is brought to a stop. Therefore, the device allows the operator to separate the printed part from the paper along the perforation without resorting to cutters having sharp edges.

Abstract: A magnetic storage/read system includes a recording medium for magnetically storing a signal and a magnetoresistive element which is driven relative to the recording medium. The magnetoresistive element may include a substrate, a first antiferromagnetic film, a first ferromagnetic film, a first nonmagnetic film, a soft magnetic film, a second nonmagnetic film, a second ferromagnetic film, and a second antiferromagnetic film, wherein the films are sequentially layered directly on the substrate with no intervening layer between any of the films. At least one of the first antiferromagnetic film and the second antiferromagnetic film may be made of nickel oxide.

Abstract: A polygon mirror mounting structure mounting a polygon mirror to an outer periphery of a rotor includes a mirror seating surface formed on the outer peripheral portion of the rotor for seating the polygon mirror thereon, and a retaining member having a ring-shaped configuration and a plurality of radially extending pawls on the outer periphery thereof for retaining the polygon mirror on the mirror seating surface. The pawls have an arcuate or tapered cross-sectional configuration and directly press the polygon mirror downwardly and radially outwardly, to thereby enable securing the polygon mirror to the rotor without providing through-holes for receiving screws in the polygon mirror.

Abstract: A magnetic disc unit has a thin film magnetic head in which a lower magnetic core and an upper magnetic core form a magnetic circuit. The upper magnetic core is constructed by magnetic films having at least two layers. A saturation magnetic flux density of the inside magnetic film, of the magnetic films having at least two layers, facing a magnetic gap of the magnetic circuit is larger than that of the outside magnetic films of the upper magnetic core and the lower magnetic core.

Abstract: A transformer including a bobbin having a primary winding frame and a secondary winding frame, a primary coil wound around the primary winding frame, a secondary coil wound around the secondary winding frame, a pair of connection pins electrically connected to a power source. A projection which can be broken or bent is provided on the bobbin. The wire of the primary coil is hitched over the projection and then wound to form the primary coil, and the projection is therafter broken or bent to loosen the primary coil. A discharge means is also provided to cause a discharge between the pair of connection pins when a high voltage is applied therebetween.

Abstract: A transformer bobbin is provided comprising a frame of approximately a rectangular shape, a first wall arranged on one end of the frame, a second wall arranged on the other end of the frame, and a center wall arranged between the first wall and the second wall. The frame, the first wall, and the center wall constitute in combination a primary winding section. The frame, the center wall, and the second wall constitute in combination a secondary winding section. In particular, the primary winding section has a container case detachably mounted thereto for selective assignment for use. Also, the container is arranged for accommodating a current disconnecting means for deenergizing a transformer circuit when the coil temperature increases up to a limit level.

Abstract: A transformer including a bobbin having a primary winding frame and a secondary winding frame, a primary coil wound around the primary winding frame, a secondary coil wound around the secondary winding frame, a pair of connection pins electrically connected to a power source A projection which can be broken or bent is provided on the bobbin. The wire of the primary coil is hitched over the projection and then wound to form the primary coil, and the projection is therafter broken or bent to loosen the primary coil. A discharge means is also provided to cause a discharge between the pair of connection pins when a high voltage is applied therebetween.

Abstract: A heating apparatus such as a microwave oven in which thermal energy of high-temperature vapor generated by heating an object is detected by a pyroelectric element and a resulting detection signal is used to control (stop) a heat source such as a microwave source, etc. Among AC voltages generated by the pyroelectric element due to heat exchange of the pyroelectric element, a voltage of a polarity generated at the time of heat discharge (temperature decrease) of the pyroelectric element is selected through a circuit means. A voltage generated by heat exchange between air moving slowly in a heating chamber and the pyroelectric element caused by the rotation of a turntable or the like is eliminated by another circuit means. A control section controls the operation of the heat source by deciding an output signal of the pyroelectric element by comparing it with a detection level determined in accordance with a noise level for a predetermined length of time after the start of the heating operation.

Abstract: A method of fabricating a thin film magnetic head including a bottom magnetic core formed on a substrate, a top magnetic core laminated through an insulation layer, with one end of the top and bottom magnetic cores being joined and another end forming a magnetic gap, and a conductor coil layer which winds around the joined section for a plurality of number of turns. At least one of the top and bottom magnetic cores has its magnetization easy axis oriented substantially orthogonal to the magnetic path direction of the magnetic head by the magnetic annealing process, so that the magnetic head has an increased output and an enhanced write ability.

Abstract: A thin film magnetic head has magnetic films, at least one of which is composed of a material containing major components of nickel and iron and one or more element from nitrogen, oxygen and carbon and has two of face-centered cubic system and body-centered tetragonal system, whereby thin film magnetic heads having a high permeability and low coercive force can be provided.

Abstract: A thin film magnetic head provided with a first and a second thin film made of a magnetic material, disposed so as to form a closed magnetic circuit; and an intermediate film made of a non-magnetic material, disposed between the first and the second thin films so as to form a magnetic gap at a part of the magnetic circuit; wherein at least one of the first and the second thin films is made of a quaternary amorphous magnetic alloy, whose principal component is cobalt and which contains hafnium, tantalum and palladium.

Abstract: A thin film magnetic head is disclosed which includes a substrate, a first magnetic core disposed on the substrate, a second magnetic core forming a magnetic path in conjunction with the first magnetic core, a conductor coil wound in the magnetic path and a gap formed between ends of the first magnetic core and the second magnetic core. At least one of the first magnetic core and the second magnetic core includes a thin film of a cobalt alloy. The cobalt alloy includes 20-70 atomic percent of cobalt, 20-60 atomic percent of nickel, 12-30 atomic percent of iron and 5-32 atomic percent of palladium.