摘要:
A hermetically sealed chamber and the method of manufacturing same, which comprises the steps of: (a) preparing two aluminum or aluminum alloy material members which face each other; (b) forming at least one extending groove portions on a surface to be metal-bonded of one of the two aluminum or aluminum alloy material members, which groove portion extends in a manner to make an enclosure; (c) forming at least one corresponding extending protruding portions on a surface to be metal-bonded of the other of the two aluminum or aluminum alloy material members, which protruding portion extends in a manner to make a corresponding enclosure; and (d) receiving internally packaged parts therebetween, inserting the at least one extending protruding portions into the at least one corresponding extending groove portions so as to be fitted, and causing the at least one extending protruding portions and the at least one extending groove portions to be metal-bonded by press-forging.
摘要:
A thermal transfer printer including a thermal head for generating heat in accordance with a desired print pattern, a platen having a surface for supporting an ink-sheet and paper, the ink-sheet and paper being pressed by the thermal head on the platen surface so that ink from the ink-sheet is transferred to the paper, a paper supply for storing and supplying paper, an ink-sheet supply and drive for storing and supplying an ink-sheet, the ink-sheet supply and drive driving the ink-sheet to move in accordance with the movement of the paper, a paper drive arranged between the platen and the paper supply, the paper drive driving the paper by the required length according to the position of the paper relative to the position of the platen, and a paper tension device for applying suitable tension to the paper at least between the platen and the paper drive so that the length by which the paper drive drives the paper is identical with the length by which the paper moves on the platen. Since the length by which the paper moves on the platen corresponds only to the length by which the paper drive drives the paper, the length by which the paper moves on the platen can be correctly controlled through the paper drive.
摘要:
A winding knob and a winding wheel for winding a drive spring are received in alignment around and along the center shaft and are capable of being coupled together in both directions of winding and their axial movement. A reverse slippage restraining post or plunger is disposed between the winding wheel and a record disc axially movable along the center shaft. The record disc is resiliently urged toward a pickup.The reverse slippage restraining post or plunger engages a locking piece provided on the record disc when it is pushed forward by the winding wheel when the winding knob is pushed forward in its first winding, while it is pushed back when the record disc is moved away from the record disc by the depression of a starting post, and is released from the engagement with the locking piece to permit rotation of the record disc when the record disc reverts back to its undepressed position when the depression on the start post is released.In order to stop any idling rotation of the record disc immediately after the completion of one sound reproduction of the record disc, a rotatable pawl member and a fixed pawl member are disposed, respectively, on the record disc or a turn table and the casing.
摘要:
Disclosed is an apparatus for electromagnetically imparting stylus force for sound reproducing device comprising an inhibit circuit for shock noise of the reproducing stylus. A selected one of start switches is actuated to start a motor to drive a recorded disc. A rotary contact provided on the rotating recorded disc engage a plurality of fixed contacts arranged such that there is a predetermined positional relationship between the fixed contacts and a position toward which a pickup is lowered so that the pickup may engage the reproduction start point of a specified one of recorded grooves provided circumferentially on the recorded disc, whereby an electromagnetic actuator is actuated in accordance with the timing of engagement between the rotary contact and the specified fixe contact which corresponding to the selected start switch. When the actuator is actuated, an armature of the actuator imparts stylus force upon the pickup. The actuator is held in its actuated status by a self holding transistor circuit. A piece of magnet is provided on the tone arm. When the magnet comes near a magnetically sensitive reed switch provided at the neighbourhood of the end position of reproduction of the recorded disc, the reed switch is closed to turn off the electromagnetic actuator to thereby complete one cycle of reproduction. A pickup inhibit transistor and a capacitor is connected to the connection between the electromagnetic actuator and the actuator self holding transistor circuit so that the pickup is made inoperative during a short period of time when the electromagnetic actuator is made actuated thereby inhibiting the amplification of the shock noises of the reproduction stylus.
摘要:
A simplified record player constructed such that the driving force from a motor is transmitted through a drive shaft to a tubular shaft which is capable of being coupled to the drive shaft so as to be rotated therewith, but only in the direction of rotation. The tubular shaft is normally biased in an axial direction away from the drive shaft. The tubular shaft has facing downwardly a directed stepped portion formed at its outer periphery. A latch shaft having an upper end face, an annular flange formed at its outer periphery and an upwardly facing stepped portion is fitted about the periphery of the tubular shaft. A coil spring supported by a washer is disposed around the tubular shaft and urges the latch shaft at the flange such that the stepped portion of the latch shaft abuts against the stepped portion of the tubular shaft. A push button is mounted to the top of the tubular shaft and includes within its interior a plurality of roller-type record retaining pieces. The retaining pieces are resiliently and partially projected from the interior of the push button toward the outside so as to clamp a record disc. A latch piece is swingably attached to the record player housing and is normally biased toward the axis of the shaft assembly such that it engages the latch shaft flange when the push button is not pushed down and acts to prevent the tubular shaft and the latch shaft from separating.
摘要:
A toy record player having an upwardly biassed, vertically moveable shaft, the upper end of which defines a push button for starting the player and which, also, is a record holder for holding and rotating a record disc. The record disc has a plurality of recording grooves on its lower face and carries marks representing the starting position of respective recording grooves on its upper face. A stylus point, which indicates the position of a tone arm, is carried thereby. The stylus is upwardly directed to confront the lower face of the record disc. Depression of the push button closes a circuit for a driving motor as well as lowering a record disc into engagement with the stylus. As the tone arm is driven to the final position of sound reproduction, it presses a latch to disengage the latter from a circumferential groove, so that the shaft is allowed to be returned upwardly, by the bias, to reset the player to its starting condition.
摘要:
A phonograph for use with a record cartridge wherein a disc record is attached to a sheet-like record holder, comprises a cartridge holder mounted on a casing for immovably holding the record cartridge with its record facing downwardly. Within the casing, a motor-driven turntable is rotatably mounted under the cartridge holder, and a speaker cone is mounted further under the turntable in concentric, back-to-back relationship for simultaneous rotation therewith. A tone arm pivoted eccentrically on the turntable has a reproducing stylus extending upwardly therefrom for engagement with a record groove of the record cartridge. The vibrations set up in the reproducing stylus during rotation of the turntable relative to the record cartridge are transmitted to the speaker cone via a vibration transmitter rod mounted on the turntable.
摘要:
A phonograph of the type wherein a plastics-made tone arm having an upstanding stylus mounted thereon is pivoted eccentrically on a turntable or rotor, under which a speaker is mounted concentrically for simultaneous rotation therewith relative to a record immovably supported above the turntable. Also mounted on the turntable is a metal-made vibration transmitter rod which is substantially pivotally supported at one end and which rests, at a point intermediate both ends thereof, on the armature of the speaker partly exposed through an aperture in the turntable. The tone arm has its free end resting on the vibration transmitter rod for sliding movement, during playback, from the other end of the rod toward its point of contact with the speaker armature. In order to preclude unnecessary changes in the volume of sound generated by the speaker during playback, the distance between the stylus and the variable point of contact of the tone arm with the vibration transmitter rod is made to decrease, with the progress of playback, in as exact proportion as feasible to the distance between the mentioned variable point and the fixed point of contact of the rod with the speaker armature.
摘要:
A switch mechanism for a phonograph disposed in an openable and closable casing having a movable contact piece and a pivotally movable pick-up bracket. The contact piece, which is in electrical communication with a source of power, is moved by a pivotally movable pick-up bracket to break the electrical circuit. The switch mechanism, also, includes a switch actuator which pushes the contact piece from the same direction as the pick-up bracket. A pawl is mounted onto the casing and is movable therewithin. When the casing is closed, the pawl pushes the switch actuator away from the contact piece to permit the circuit to be closed.