Abstract: The bearing device comprises a bearing 4, a washer 5 and a coupling piece 6 that couples the bearing 4 to the washer 5 and/or separates itself from the washer 5 and the bearing 4 by a pressure force applied thereto, wherein the bearing, the washer and the coupling piece are integrally formed with each other, and the base flap 7 is formed with a projection 7b. Due to this construction, an operator can easily hold the bearing 4 and the washer 5 as one component, and as the coupling piece 6 can be readily removed by the projection 7b, a working efficiency for installing this device can be drastically improved, and the automated mounting operation thereof can also be easily implemented.

Abstract: The present invention provides a method of controlling a wavelength-selective light emitting device comprising an array of plural semiconductor laser diodes differing in diffraction grating pitch; at least a multiplexer; and at least a modulator, wherein an absorption edge wavelength of the modulator is controlled following to an oscillation wavelength of selected one of the plural laser diodes.

Abstract: A disk device of the present invention includes a switch 136 for detecting a disk inner peripheral position of a compact disk, a projecting piece 132 formed on a slide bar 131 to detect the displacement of a movable body 115, on which an optical pickup is provided, outside the outer periphery of the compact disk and the minidisk in cooperation with the switch 136, and a linkage mechanism such as a rotation member 141 which switches a clutch 120 in response to the displacement of the movable body 115 outside the outer periphery of the disk, which is detected from the abutment of the movable body 115 with the projecting piece 132.

Abstract: A tape player is provided to simplify a mechanical part, eliminate parts, and provide efficient assembly of the mechanical part and a more compact apparatus. The tape player includes pins respectively moving in four different grooves provided in one disk-like cam, and a lever in conjunction with the movement of the pins to use movement of the lever so as to perform a cassette tape carry in/out operation, a head base moving operation, a playback running direction switching operation, and a selective operation to transfer driving force to a reel rest during fast forward.

Abstract: A tape player is provided to simplify a mechanical part, eliminate parts, and provide efficient assembly of the mechanical part and a more compact apparatus. The tape player includes pins respectively moving in four different grooves provided in one disk-like cam, and a lever in conjunction with the movement of the pins to use movement of the lever so as to perform a cassette tape carry in/out operation, a head base moving operation, a playback running direction switching operation, and a selective operation to transfer driving force to a reel rest during fast forward. A half blanking is provided for a periphery of a hole portion in the main base to prevent a gear portion of a reel rest from contacting the main base.

Abstract: A disc device having a floating base supported by a chassis through a plurality of elastic members, a holder which is supported on the floating base so as to be able to move vertically with respect to the floating base, and into which a disc cartridge is inserted, a slider, slidably disposed so as to move in directions of inserting and discharging a disc cartridge into and out of the disc device, for holding and carrying a disc cartridge inserted thereinto, and a driving arm, one end part of which is rotatably supported on an axis, and another end part of which can be engaged with the slider for inserting and discharging the disc cartridge. Furthermore, the device having a pair of slide plates slidably fixed on the chassis, for securing the floating base to the chassis and for releasing the floating base from the chassis, a pair of links for sliding the pair of slide plates, and a rotary member for rotating the driving arm so as to drive the slider and for driving the pair of links.

Abstract: A disc device including a floating base supported by a chassis through a plurality of elastic members, a holder which is supported on the floating base so as to be able to move vertically with respect to the floating base, and into which a disc cartridge is inserted, a slider, slidably disposed so as to move in directions of inserting and discharging a disc cartridge into and out of the disc device, for holding and carrying a disc cartridge inserted thereinto, and a switch lever, pivotably supported on the holder, for detecting that a disc cartridge is inserted correctly. A shutter opener slidably is disposed on the holder so as to be able to slide in directions of inserting and discharging the disc cartridge into and out of the holder, the shutter opener having a pair of grooves engaging pins fixed to said holder, the shutter opener having a projecting portion for opening a shutter of the disc cartridge carried by the slider.

Abstract: A tape player is provided to simplify a mechanical part, eliminate parts, and provide efficient assembly of the mechanical part and a more compact apparatus. The tape player includes pins respectively moving in four different grooves provided in one disk-like cam, and a lever in conjunction with the movement of the pins to use movement of the lever so as to perform a cassette tape carry in/out operation, a head base moving operation, a playback running direction switching operation, and a selective operation to transfer driving force to a reel rest during fast forward.

Abstract: A disc device including a floating base supported by a chassis through a plurality of elastic members, a holder which is supported on the floating base so as to be able to move vertically with respect to the floating base, and into which a disc cartridge is inserted, a slider, slidably disposed so as to move in directions of inserting and discharging a disc cartridge into and out of the disc device, for holding and carrying a disc cartridge inserted thereinto, and a switch lever, pivotably supported on the holder, for detecting that a disc cartridge is inserted correctly. The slider comprises a wrong-insertion preventing lug projecting inwardly from the slider, which can be engaged in a groove formed on one edge of a disc cartridge when the disc cartridge is inserted into the holder, and the switch level has a free end portion which is positioned outside a free end part of the wrong-insertion preventing lug.

Abstract: A p-InP buffer layer is formed on a p-type InP substrate. A selective growth layer consisted of a p-InP clad layer, a SCH-strained MQW layer, and an n-InP clad layer sequentially in stripe form is formed on the buffer layer. On the surface of the buffer layer at both sides of the selective growth portion, a p-InP buried layer, an n-InP blocking layer, a p-InP blocking layer and SCH-MQW carrier recombination layer are selectively grown in the sequential order in a manner that those layer are not grown on the upper surface of the selective growth portion. With burying upper portions of these layers, an n-InP clad burying layer, and an n-InGaAsP contact layer are formed. Then, a surface electrode is formed with covering the entire surface. Also, a back surface electrode is formed on the backside surface of the p-type InP substrate.

Abstract: A disc device including a floating base supported by a chassis through a plurality of elastic members, a holder which is supported on the floating base so as to be able to move vertically with respect to the floating base, and into which a disc cartridge is inserted, a slider, slidably disposed so as to move in directions of inserting and discharging a disc cartridge into and out of the disc device, for holding and carrying a disc cartridge inserted thereinto, and a switch lever, pivotably supported on the holder, for detecting that a disc cartridge is inserted correctly. A holder is rotatably engaged with the holder arm and accepts a disc cartridge inserted thereto, wherein when replaying the disc cartridge held in the holder, the disc cartridge is loaded onto the floating base by rotating the holder with respect to the holder arm and rotating the holder arm with respect to the floating base.

Abstract: A disc device comprises a floating base supported by a chassis through a plurality of elastic members, a holder which is supported on the floating base so as to be able to move vertically with respect to the floating base, and into which a disc cartridge is inserted, a slider, slidably disposed so as to move in directions of inserting and discharging a disc cartridge into and out of the disc device, for holding and carrying a disc cartridge inserted thereinto, a turn table disposed on the floating base and rotationally driven by a motor, onto which a disc accommodated within the disc cartridge is loaded, an optical pickup disposed in the floating base, for reading information from the disc which is rotated by the turn table, and a protrusion projecting from the slider to the floating base, the protrusion being brought into contact with the floating base, when the slider undergoes displacement toward the floating base, so as to prevent the slider from coming into contact with either the turn table or the optic

Abstract: Disclosed is an optical semiconductor device includes a multiquantum well structure comprising a well layer and a barrier layer, wherein: the well layer is made of InGaAsP, InGaAs or InGaP; the barrier layer is made of InGaAlAsP, InGaAlAs or InGaAlP; and optionally the well layer has the same In/Ga ratio as the barrier layer and the well layer is compressively strained. Also disclosed is a vapor-phase growth method of a multiquantum well structure comprises a well layer and a barrier layer or further comprises an intermediate layer between the well layer and the barrier layer, comprising the steps of: continuously supplying at a constant flow rate one or several V group gases and one or several first III group gases during the growth of the multiquantum well; forming the well and barrier layer by interrupting the supply of a second III group gas different from the first III group gas; and forming the intermediate layer by varying a flow rate of the second III group gas.

Abstract: A rotational driving apparatus for disks includes a motor mounting base, a motor attached to the motor mounting base, a turn table made of a non-magnetic material and attached to a rotational shaft of the motor, for supporting a disk thereon, a turn table magnet disposed on the turn table, for absorbing the disk placed on the turn table, and a magnetic plate member disposed on the motor mounting base and under the turn table, thereby generating a transverse force exerted on the rotational motor shaft due to a magnetic force of the turn table magnet which acts on the magnetic plate member so as to tilt the rotational motor shaft.

Abstract: Disclosed are a carbonate group-modified epoxy resin in which carbonate groups are introduced into an epoxy resin having secondary hydroxyl groups at terminals or lactone-modified epoxy resin having primary hydroxyl groups at terminals by the ring-opening reaction of a cyclic alkylene carbonate, a process for the preparation thereof, and a thermosetting resin composition containing the carbonate group-modified epoxy resin.

Abstract: In a magnetic tape recording and playback device, a resilient body is engaged with a head base. At the time of recording and playing back a tape, the head base is pressed and fixed when the resilient body is directly pushed by a lever, and at the time of withdrawing the head, the head base is directly driven by the lever, so that an engaging member of a main base is engaged with a pressing member, and the head base is pressed and fixed. In this way, a force given to the resilient body is reduced at the time of head base movement. It is possible to reduce the required head base drive force at the time of head base movement.

Abstract: A matrix relay is formed with a plurality of latching relays arranged in a matrix and mounted on a base of an electrically insulative material. Each of the latching relays comprises an excitation coil, permanent magnet, a pair of first and second fixed contacts, and an armature carrying a pair of first and second movable springs each providing movable contacts. The armature is magnetically coupled to the excitation coil so as to be movable in response to energization of the coil by current of selective polarity between close and open positions of the fixed and movable contacts. A plurality of the armatures of the latching relays arranged in a row of the matrix are assembled into a single armature block to be mounted on the base as a single unit. The armature block comprises a single pair of first and second supporting members made of an electrically conductive material.

Abstract: An electromagnetic relay has a base provided with an insulation enclosure and with a contact block outwardly of the enclosure. An electromagnet block is received within the enclosure and includes a coil, yokes, and an armature extending through the coil along the length of the enclosure. The armature is magnetically coupled to the coil and is movable relative to the yokes upon energization of the coil. A card is provided to connect the armature and a movable contact of the contact block for closing and opening the contact. A cover fitted on the base includes an insulation partition which extends between the enclosure and the contact block to accomplish a double-wall insulation between the electromagnet and the contact block. The card has a trunk for connection with the armature and a crosspiece for connection with the movable contact.

Abstract: A hydroxy-terminated linear carbonate is produced by reacting a cyclic alkylene carbonate such as neopentyl glycol carbonate with a substance having at least one alcoholic hydroxyl group in the presence of a catalyst. Mono- or polyhydric alphatic alcohols, polycaprolactone polyols, hydroxyl group-containing acrylic monomers and polymers, and polyester polyols are modified by the reaction with the cyclic alkylene carbonate to have an enhanced reactivity and resistance to hydrolysis.

Abstract: The present invention provides a process for producing a variety of unsaturated carbamic acid derivatives from corresponding unsaturated carbamates by substitution reaction. The present invention provides a process for producing unsaturated carbamic acid derivatives, comprising reacting an unsaturated carbamate represented by ##STR1## wherein R represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, R.sup.1 represents a residue of an alcohol from which an OH group is removed,with an alcohol, a primary or secondary amine or an oxime at a temperature of 80.degree. to 150.degree. C. to substitute the --OR.sup.1 group in the formula (A).