Abstract: There is disclosed a magnetic head assembly for use in a disk drive that can store and retrieve data from a magnetic disk. The assembly has a carriage and an arm on which a lower magnetic head and an upper magnetic head are carried, respectively. A hinged leaf spring is located on the carriage remotely from the heads. The arm can swing about the spring which is welded to the spring mount portion of the carriage.

Abstract: A push switch comprises first and second push/lock mechanisms, and first and second switch units. The operating members of the first and second push/lock mechanisms are disposed opposite to the corresponding levers of the first and second switch units. A first driving pin whose one end is secured to the slider of the first switch unit is pressably engaged at the other end with cam member of the second push/lock mechanism, whereas a second driving pin whose one end is secured to the slider of the second switch unit is pressably engaged at the other end with the cam member of the first push/lock mechanism.

Abstract: A gimbals spring for supporting a floating type magnetic head has bent portions formed at both lateral edges of a load beam of the gimbals spring, the bent portions projecting in a direction in which the magnetic head projects from the load beam. A reinforcing plate is secured to the reverse side of the distal end portion of the load beam with respect to the magnetic head in order to make compensation for the strength of said distal end portion which is weakened due to the fact that the bent portions cannot extend as far as the distal end portion of the load beam because of the existence of the magnetic head. Thus, the bent portions do not take part in determination of the overall thickness of the magnetic head including the gimbals spring, which means that it is possible to reduce the thickness of the floating type magnetic head and minimize the size of the magnetic disk drive.

Abstract: An apparatus for detecting an angle of rotation is disclosed which comprises a rotary magnet having four poles, two magnetic sensors of a ferromagnetic material disposed over the periphery of the rotary magnet so as to face the magnetic poles of the rotary magnet and to have a phase difference of 3.pi./8 therebetween, a signal generating portion for applying the magnetic sensors of a ferromagnetic material with a first and a second sine-wave signals having a phase difference of .pi./2 in electrical angle therebetween, a synthesizing portion for synthesizing signals output from both of first magnetic sensor of a ferromagnetic material and second magnetic sensor of a ferromagnetic material thereby to output a synthesized signal with a phase difference corresponding to an angle of rotation .theta. from the first sine-wave signal, and a rotational angle detecting portion for detecting the angle of rotation based on the phase difference.

Abstract: A fixer-terminal structure rigidly fixed to the outside of the casing of a switch adapted for automotive power window. The front ends of the fixed terminals are bent through an angle of at least 90.degree. such that their corners are curved, so that any lead wire which comes into contact with the front ends of the terminals will not break.

Abstract: A door assembly for a device for driving a recording medium has a panel defining an opening through which the device can be loaded with a recording medium or unloaded. A door is rotatably supported on the inside of the panel. A pair of springs are associated with the door for urging it in a direction in which it is rotated to close the opening. A shutter is slidably supported on the inside of the panel for closing the opening when the device has been loaded with a recording medium. A pair of levers are rotatably supported on the panel and are adapted for simultaneous rotation. Each lever has a first end connected to the shutter and a second end which is engageable by the recording medium for rotation in a direction in which its first end is rotated to move the shutter in a first direction in which it closes the opening. Another spring is connected between the levers for urging the first ends thereof in a direction in which they move the shutter in a second direction in which it clears the opening.

Abstract: This invention provides an attachment structure of a car sound apparatus of the type in which an inner case is fitted in an opening of a dashboard panel and the car sound apparatus is inserted through an insertion hole of the inner case and attached there, which is characterized in that pin fitting portions are provided on the front ends of the side faces of the inner case each comprising an inclined edge and a fitting groove, and lock pin units are provided on the side faces of the car sound apparatus each allowing up and down movement of its lock pin, wherein at the time of attaching the car sound apparatus to the inner case the lock pin moves along the inclined edge and fits in the fitting groove of the pin fitting portion, whereas at the time of detachment the lock pin is moved upward by means of a removing member to release engagement with the fitting groove to thereby permit pulling out.

Abstract: A thermal printer includes a single thermal recording medium interposed between printing paper and a thermal head so that when predetermined energy is applied to the thermal head, colorant on the thermal recording medium is transferred to the paper to print out a desired letter or symbol, or alternatively the printed letter or symbol is removed and erased from the paper because the colorant once transferred to the paper is attached to the colorant on the thermal recording medium. A printing method using the thermal printer is characterized in originally setting printing energy and erasing energy the latter of which is equal to or larger than the former, applying the printing energy to the thermal recording medium to effect printing operation, and applying the erasing energy to the thermal recording medium to attach it to the printed letter or symbol on the paper to remove and erase it from the paper.

Abstract: A paper feeding controlling method for a printer in which a record paper is first fed in a feeding direction until a leading end portion of the record paper reaches a recording position. In this position, the record paper will be printed for a first print line and then line spaced to allow subsequent printing for a next print line. When the end of the record paper advances farther than a paper bail roller after printing for several lines involving line spacing operations in this manner, the record paper is now fed reversely by a predetermined distance until the leading end of the record paper comes to a position forwardly of the paper bail roller in the feeding direction. Then, the paper bail roller is moved away from the platen, and the record paper is advanced by the predetermined distance with or without an addition of one line space distance. Finally, the paper bail roller is moved toward the platen until the record paper is held between the platen and the paper bail roller, and printing will be resumed.

Abstract: A manually-operated optical rotary encoder is provided with light receiving and emitting elements, the optical encoder generating a plurality of pulse signals. The rotary encoder comprises a reflecting plate and a non-reflecting plate which are superposed. The rotary encoder comprises a first code plate and a second code plate, which are alternately and continuously formed with light reflecting portions and non-reflecting portions. The rotary encoder further comprises a roller engageable with concavo-convex portion provided in the outer peripheral edge of the first code plate, a shaft for the roller and a supporting member for rotatably supporting the roller so that the latter may come into contact with the concavo-convex portions. The roller, the shaft and the supporting member are formed of synthetic resin.

Abstract: A printer comprising a printing drive gear for generating a print operation output and having a print control cam for controlling a print operation; a paper feed control cam adapted to be rotated with the printing drive gear as a unit for controlling a paper feed operation; a paper feed driving intermittent gear for generating a paper feeding output; a ratchet wheel for controlling an output timing of the paper feed driving intermittent gear; a print control lever adapted to be moved in association with the print control cam and be releasably engaged therewith; a paper feed control lever adapted to be moved in association with the paper feed control cam; a pawl lever adapted to be moved integrally with the paper feed control lever and be releasably engaged with the ratchet wheel; and an electromagnetic clutch capable of generating a first rotative output for driving the print control lever and a second rotative output for driving the paper feed control lever and the pawl lever, wherein the paper feed control

Abstract: A floating type magnetic head includes a magnetic core which is secured to a slider. The magnetic core is secured to the slider by glass or a synthetic resin on the rail surface side. It is secured to the slider on the other side by heating and melting the glass rod placed on a groove which is provided on a wiring groove of the slider for receiving the glass rod, whereby the magnetic core is securely fixed to the slider, which leads to the stabilization of the properties of the head and the improvement of the reliability.

Abstract: An automatic changer for cassette tapes suited for the use in an automobile or the like constituted of a tape container capable of containing a plurality of cassette tapes and a table for supporting the tape container. The tape container is provided with a first engagement portion extended in the direction orthogonal to the direction in which the cassette tape is inserted into the tape container and the table is provided with a second engagement portion which engages the first engagement portion. The first engagement portion is positioned out of the center of the side plate of the tape container which is disposed in parallel with the direction in which the cassette tape is inserted and adapted to be movable relative to the second engagement portion.

Abstract: Disclosed herein is a pusher device for a plastic optical fiber comprising a pair of pusher members for holding and fixing end portions of plural plastic optical fibers covered with sheaths, and an annular fixing member engaged with an outer cover for covering at least a part of said sheaths not held by said pair of pusher members and generally covering said plural plastic optical fibers, said fixing member being rotatably received in a space defined by said pair of pusher members in such a manner as to be restrained from getting out of said space. Even when the optical fiber cable is pulled or bent near the end portion thereof, the end surfaces of the optical fibers are not slipped.

Abstract: The casisng of an electrical switch is made waterproof by a sliding seal interposed between a switch operating member located outside the casing and the peripheral edge of an opening into the casing. The operating member and seal engagingly slide on the peripheral edge of the casing and the operating member has a part which projects into the casing through a hole in the seal.

Abstract: Disclosed herein is a pusher device for a plastic optical fiber comprising a pair of pusher members for holding and fixing end portions of plural plastic optical fibers covered with sheaths, and a plurality of channel-like pushing portions provided on at least one of said pair of pusher members in such a manner as to correspond to said plural plastic optical fibers, said channel-like pushing portions having inner wall surfaces to be in press-contact with said sheaths. With this arrangement a contact area between the pusher members and the sheaths is increased to prevent slip of the optical fibers relative to the sheaths and maintain good light transmittance.

Abstract: In a push button indicating device including a first slide member having an operational portion formed with an indicating portion on a front surface thereof, a second slide member slidably supported to the first slide member and having a substantially sectional L-shaped rotational member rotatably mounted on the side of the indicating portion, the rotational member having a light transmitting plate and a light shielding plate, a frame for slidably supporting the first slide member, and a lock for restricting a sliding position of the first slide member, wherein at least two positions of the first slide member are selected between a depressed position where the light transmitting plate faces the indicating portion and an undepressed position where the light shielding plate faces the indicating portion; the improvement comprises a light guiding member provided in the second slide member for guiding light to the rotational member, and a light transmitting hole formed through at least both of the first slide memb

Abstract: A matrix driver is provided, comprising a plurality of light emitting diodes, energizing means for successively pulse-driving and scanning the light emitting diodes, and control means for instructing the energizing means about the sequence of scanning, characterized by protective means for preventing one specified diode among the light emitting diodes from being continuously pulse-energized.

Abstract: A lamp illumination adjusting apparatus for automobiles comprises a reference triangular wave generator, an adjusting voltage setting circuit, a comparator to compare the reference triangular signal with the adjusting voltage and to output comparison signal, a driver circuit including a MOS field effect transistor which is controlled directly by the comparison signal, and a lamp which is connected in series to the driver circuit and interposed between a power source terminal and the ground.

Abstract: An optical coordinate input device wherein there is no possibility of operation in error or of destruction of a light receiving element and a correct coordinate signal can be produced even if external light of a high intensity acts upon the light receiving element. The device comprises light amount adjusting means of the transmissive type located in front of light receiving elements, and controlling means for controlling the amount of light to be passed through the light amount adjusting means in response to an amount of light incident to the light receiving elements. Thus, if there is the possibility that an output value of the light receiving elements may reach a saturation condition due to external light of a high intensity, the light transmittivity of the light amount adjusting means is lowered to decrease the amount of external light to be received the light receiving elements.