Abstract: A record player capable of playing phonographic records that may be played in a scratch style by a user. The record player includes a tonearm that is rotatably supported at or near an end of the tonearm by a structure having both horizontally and vertically fastening points to the tonearm. The fastening points are configured to receive a user activated tension adjustment element. A user may advance or retreat the tension adjustment element to selectably control the positioning, or relative tension in the tonearm such that any record skipping due to undesirable tonearm pressure is controlled, or to achieve a specific sound.

Abstract: The invention relates to tonearm tracking mechanisms in phonograph players and mechanical devices constructed for the purpose of reproducing or playing back recorded audio material previously impressed, in the form or grooves, onto a surface of a disk, which are commonly called phonograph players or turntables. Such disk is commonly called, among other similar words, a phonograph record or a vinyl disk. The present invention is a tangential tracking tonearm mechanism, wherein the tonearm bearing subassembly has two rotary bearings in the lateral plane and a coupling linkage built into a compact subassembly. The collective contribution of these elements, when properly configured and appropriately adjusted, make, during playback of audio material on a disk, reduced playback distortion over radial tracking mechanisms and closely mimics the conditions under which nearly all masters are made.

Abstract: According to the present invention, when processing shafts in a centerless grinding machine, engagement between the shafts is prevented without rearranging the shafts, and thus outer circumferential faces of the shafts can be precisely processed. A shaft 12 is used in a hydrodynamic bearing device, and includes a cylindrical column formed with an outer circumferential face 12a forms a hydrodynamic radial bearing portion, a tapped hole 12j that is formed at a first end of the cylindrical column, and a first projecting portion 12b formed at a second end of the cylindrical column. When the first end and the second end of the shafts 12 are arranged side by side in an axis direction, the first projecting portion 12b of the shaft 12 can not interfere with the tapped hole 12j of the other shaft 12.

Abstract: A data recording/reproduction apparatus is provided, which apparatus includes a spindle motor which is held by a base body and rotates an optical disk, an optical pickup which projects a laser beam into a spot on the optical disk for data recording/reproduction, first and second support mechanisms provided on the base body, and a seek mechanism which is held by the first and second support mechanisms so as to be freely tilted with respect to the base body and actuates the optical pickup in radial directions of the optical disk. The first support mechanism is vertically movable in directions of a thickness of the optical disk so that a tilt of the optical pickup with respect to the optical disk is adjusted.

Abstract: A data recording/reproduction apparatus is provided, which apparatus includes a spindle motor which is held by a base body and rotates an optical disk, an optical pickup which projects a laser beam into a spot on the optical disk for data recording/reproduction, first and second support mechanisms provided on the base body, and a seek mechanism which is held by the first and second support mechanisms so as to be freely tilted with respect to the base body and actuates the optical pickup in radial directions of the optical disk. The first support mechanism is vertically movable in directions of a thickness of the optical disk so that a tilt of the optical pickup with respect to the optical disk is adjusted.

Abstract: A carrying mechanism to optical pickup of a traverse of optical disc apparatus, comprises: four bar holders, connected to a traverse; two sliding bars, which each with its both ends is connectedly inserted into a receiving chamber of two opposite bar holders respectively; and an optical pickup head which both lateral ends are connectedly sleeved on one said sliding bar respectively and which is moveable back and froth on said sliding bar; wherein said bar holder is integrally formed and provided with a elastic support capably against said sliding bar. Therefore, the bar holder of the invention, with less working parts for the cost capably reduced, with the assembly more easily made and with the precision demanded to working parts not too high, may promote the level of the product used.

Abstract: The hard disk apparatus has first and second skew adjust members 21 and 22 for adjusting inclinations or an inclination of a main guide shaft 16 and/or a sub-guide shaft 17. The first and second skew adjust members comprise: bearing parts 41 or a bearing part 41 provided such that the centers or center of shaft holes 43 or a shaft hole 43 in which ends or an end of a main guide shaft 16 and/or a sub-guide shaft 17 is inserted and supported is deviated from the centers or center of end surfaces or an end surface of the main guide shaft 16 and/or a sub-guide shaft 17, the end surfaces or end surface being substantially perpendicular to the axial directions or axial direction of the main guide shaft 16 and/or the sub-guide shaft 17; and first, second, and third contact surfaces A, B, and C that are brought into contact with a support base 8, the first, second, and third contact surfaces forming a substantially rectangular outer circumference.

Abstract: A galvano mirror unit includes a galvano mirror, a rotor to which the galvano mirror is mounted, a stator that rotatably supports the rotor about a rotation axis, a pair of center pins provided to the stator, and a pair of receive members provided to the rotor. The receive members respectively receive the center pins. The rotor is pivoted by the engagement of the center pin and the receive member.

Abstract: The hard disk apparatus has first and second skew adjust members 21 and 22 for adjusting inclinations or an inclination of a main guide shaft 16 and/or a sub guide shaft 17. The first and second skew adjust members comprise: bearing parts 41 or a bearing part 41 provided such that the centers or center of shaft holes 43 or a shaft hole 43 in which ends or an end of a main guide shaft 16 and/or a sub guide shaft 17 is inserted and supported is deviated from the centers or center of end surfaces or an end surface of the main guide shaft 16 and/or a sub guide shaft 17, the end surfaces or end surface being substantially perpendicular to the axial directions or axial direction of the main guide shaft 16 and/or the sub guide shaft 17; and first, second, and third contact surfaces A, B, and C which are brought into contact with a support base 8, the first, second, and third contact surfaces forming a substantially rectangular outer circumference.

Abstract: An optical pick-up feeding device for easily adjusting an optical axis of an optical pick-up device to be perpendicular with respect to a surface of an optical disc. The optical pick-up feeding device includes a feeding section to feed the optical pick-up device, a guiding section to guide the optical pick-up device while it is fed by the feeding section, and an adjusting section to adjust the guiding section so that the optical axis of the optical pick-up device is perpendicular with respect to the surface of the optical disc. The feeding section has a lead screw to feed the optical pick-up device and a stepping motor to rotate the lead screw. The guiding section has a pair of guide shafts, and is adjusted by adjusting holders engaged with each end of one of the guide shafts and one end of the other guide shaft.

Abstract: The present invention relates to a gear assembly which comprises an eccentric member having a first cylindrical portion with a first center axis in accordance with a center axis of said eccentric member for receiving said shaft on a front side thereof fronting said motor, and a second cylindrical portion with a second center axis on a back side thereof, said second center axis being eccentrically disposed with said first center axis; a pinion gear equipped with a radial ball bearing in its center, having a first hole, a second hole opposing said first hole, a first number of teeth and a first diameter, said first and second holes being parallel with a center line thereof and said said radial ball bearing being inserted into said second cylindrical portion; With the structure of the gear assembly for a pickup unit feeding apparatus, it is permitted to miniaturize the size of a pickup unit feeding apparatus as well as to exactly control the pickup unit.

Abstract: A flexural bearing for an actuator assembly of a magnetic-disk drive includes a first and a second resilient member (10 and 12) and a third resilient member (14). The resilient members are attached to a base plate (40) of the disk drive and pivotally support an actuator body (16). The third resilient member includes an tensioning spring (18). The first and second resilient members are coupled to the base plate at two distinct locations and share a common anchor point on the actuator body.

Abstract: An technical device, particularly an electromechanical deck for moving information carriers, has one plastics part formed on a deck plate, which part has been moulded onto the deck plate by outsert-moulding and has at least one bridge element which traverses a hole in the deck plate, and retaining elements, which are situated at the deck plate surfaces and are interconnected by a bridge element, the plastics of said part being subject to shrinkage after injection-moulding, the mobility of the plastics part relative to the deck plate as a rotatable or slidable part being obtained automatically through its shrinkage by the following construction:1. the bridge element is provided with retaining elements at only one of the deck plate surfaces;2. the diameter of the hole in the deck plate widens towards the surface which is free of retaining elements;3. the bridge element has a flange which fills the portion of widened diameter when the plastics is injected during injection-moulding.

Abstract: A pickup feeding apparatus is comprised of a first rack provided on a pickup supporting member supported so as to become movable along a guide shaft, a second rack provided slidably relative to the first rack, a drive force transmitting gear for transmitting a driving force of a driving source to the first and second racks, a spring member for spring-biasing one of the first and second racks to the other along the guide shaft of the first and second racks in such a direction that gear teeth of a gear of the drive force transmitting means which are meshed with the first and second racks are gripped. A disc player is also disclosed, in which a disc drive motor and a pickup feeding motor are provided on the same chassis and the disc drive motor is located on the chassis at the position above the pickup moving locus fed by the pickup feeding device.

Abstract: Disclosed is a method and apparatus for attaching a bearing cartridge to an actuator arm assembly in a disk drive. The bearing cartridge includes the actuator shaft, an outer sleeve and a set of bearings. The actuator arm assembly has a bore therein which receives the bearing cartridge. The bearing cartridge is anchored to the actuator arm assembly at a single location.

Abstract: An optical information recording-reproducing apparatus includes an optical head unit, a holding device, a moving device and a guide shaft. The optical head unit effects recording and/or reproduction of information on an optical information recording medium. The holding device holds the optical information recording medium. The holding device includes a guide portion and a magnetic field producing device provided near the lower portion thereof. The moving device moves the holding device relative to the optical head unit. The guide shaft, formed of a magnetic material, guides the holding device for movement in a predetermined direction.

Abstract: An optical head driving apparatus is constructed to move an optical head along the radius of an information storage medium which is rotating, to face the optical head to a predetermined position of the information storage medium where the optical head carries out a predetermined information process with respect to the information storage medium. The optical head driving apparatus comprises at least one circular bearing and at least one elliptic bearing. The bearings are disposed on opposite sides of a center of gravity of the optical head, respectively. A first guide shaft extends to pass through the circular bearing while a second guide shaft extends to pass through the elliptic bearing. The bearings and the first and second guide shafts constitute a guide means to movably support the optical head. The optical head driving apparatus further comprises an optical head moving means for controlling the movement of the optical head.

Abstract: A high density spiral track forming apparatus according to the present invention a linear motion mechanism for moving an optical recording system in a radial direction of a disk-shaped substrate, and a length measurement machine for detecting the distance travelled by the optical recording system in the radial direction of the substrate disk. The apparatus further includes a velocity computing device for detecting the travel velocity of the optical recording system according to the detected result of the length measurement instrument, and a velocity control device which detects the difference between the travel velocity of the optical recording system which is detected by the velocity computing device and a predetermined velocity, and controls the linear motion mechanism so as to eliminate that difference.

Abstract: A low-friction slide apparatus for use with the translation stage of an optical disc recording/playback system is disclosed. The apparatus includes a rail which is fixed in position. The rail includes porous strips affixed to two orthogonal sides along its longitudinal dimension. A plurality of passages between the rail and the porous strips permits air to be forced outwardly through the pores of the strip material. The slide member, which is movably mounted on the rail, has bearing surfaces adjacent the porous strips attached to the rail. Permanent magnets mounted along these bearing surfaces maintain an attractive force between the slide and the rail, countering the force direction of the air flow, thus providing a low-friction bearing film of compressed air. A linear motor included in the rail and slide member induces motion of the slide along the rail.

Abstract: A pivotal-arm device (15) for a disc scanning unit (13) for recording and/or reading information comprises a deck plate (3A), a pivotal arm (25) carrying the scanning unit, and pivotal-arm bearing means. The pivotal arm bearing means comprise two bearings disposed on opposite sides of the pivotal arm, at least one of the bearings comprising two bearing members (31, 33), a spherical bearing element, which cooperates with these bearing members, and a viscous medium. At least one of the bearing members has a concave bearing surface (33A), between which bearing surface and the bearing element a gap (35) is formed, which gap widens towards the edge of said bearing surface and which contains said viscous medium. A resilient element (39), which is secured to the deck plate, urges the bearings towards one another.

Abstract: An air bearing straight line tracking phonograph tonearm combines the features of a readily removable decoupled counterweight arm which bears horizontally and vertically adjustable counterweights; a readily removable tonearm tube with tapered wall thickness having an integral headshell, cartridge and stylus; various simple means for vertical and leveling adjustments; and a vertical tracking angle or stylus rake angle control that automatically retains perfect tracking tangency.

Abstract: A tone arm assembly of the type employed in phonograph assemblies and the like, wherein the tone arm assembly is supported on a unipivot bearing assembly having a pivot point coinciding with an imaginary horizontal line extending through a center of gravity of the tone arm assembly, with the horizontal line extending perpendicular to a longitudinal axis extending through the tone arm assembly from a pick-up cartridge positioned at one end to a counterweight positioned at an opposite end thereof.

Abstract: A tone arm for a phonograph pickup having a bifilar flexible ligament suspension for vertical and lateral displacement. The suspension takes the place of the more usual pivots, and employs a pair of thin flexible ligaments or fibers in a skewed convergent torsional bifilar configuration. The lower ends of the two ligaments are attached to a basal element, which may be shaped as a disc, connected to and lying below the arm itself. The flexibility of the ligaments confers freedom to the arm for angular displacement in the vertical and horizontal planes, but the skew prevents linear displacement along the direction of its length. The basal element is preferably immersed in a container of viscous liquid to damp movement of the arm.

Abstract: The tone arm (13) of a record player is carried by a carriage (14) which is movable along a motor-driven rotating spindle (6) extending tangentially with respect to the axis of the turntable (10). For supporting it on the spindle the carriage has two bearings (15 and 16) which are spaced from each other in the axial direction of the spindle and each of which has a bearing surface which engages the spindle at only the upper part of the circumference of the spindle. This arrangement permits slight pivotal movements of the carriage relative the spindle about axes transverse to the spindle to compensate for the forces which occur during accelerations of the tone arm, as when the stylus enters the lead-out groove. The tone arm is connected to a part (20) of the carriage which is made of a vibration-damping material.

Abstract: A phonograph tone arm cartridge rotating system that keeps the cartridge perpendicular to the record groove radius by pivoting it with a belt and pulley linkage that does not change length or tension during movement of the tone arm.

Abstract: A pickup arm device for disc phonograph player comprising a pickup arm and a pivot holder integrally combined with the pickup arm and having an opening substantially at the center thereof to receive a pivot bearing and a pair of holes formed at opposite sides of the pivot holder. A pair of pivots are inserted into the pair of the holes so that they are brought into contact with the pivot bearing from the opposite sides. At least one of the paired pivots is fixedly secured to the pivot holder by means of a hardenable adhesive.

Abstract: A tone arm comprising a lever with a pickup cartridge on its end and a tracking-force setup assembly, a movable base connected to the lever, and a fixed base, the two bases facing each other. Installed between said bases are a vertical pivot attached to one of the bases and cooperating with a spherical thrust bearing in the other base, and a ball making contact with one of the bases and cooperating with a guiding element in the other base. The guiding element may represent an arched slot, two equidistant arched lugs or a spherical hole.

Abstract: A swing-arm device (5) for an optical disk player comprises a swing arm (16), which near one end (17) carries an optical scanning unit (6) and which is electromagnetically pivoted by means of coils (27, 28) and a permanent magnetic stator (29, 30, 49-52, 54) arranged on the swing arm. The center of mass (Z) of the pivotal assembly, inter alia comprising the swing arm and the optical scanning unit, is disposed on the pivotal axis and the two coils are disposed diametrically on both sides of the pivotal axis and exert equal pivotal forces which act in one plane which is perpendicular to the pivotal axis and which extends through the center of mass. The center of mass is disposed midway between two ball-bearings (20, 21).

Abstract: In a video disc player, a support roller is mounted to one end of a pickup carriage by means of an eccentric stud. The height of the roller in respect of the carriage is adjusted by changing the angular position of the eccentric stud. A support bracket is disposed at the other end of the carriage, where a pair of adjustable members are provided for adjustment of the relative spatial position of the carriage and the support bracket.

Abstract: A pickup arm device comprising a rotary bearing having a mounting bed rotatable about both the vertical and horizontal axes, and an arm assembly consisting of an arm, a cartridge mounting head shell at one end thereof, a rider weight at the other end thereof and a mount or saddle which is formed between the ends thereof and adapted to be slidably mounted on the mounting bed of the rotary bearing, whereby the arm assembly including a cartridge may be easily replaced.

Abstract: In a bearing system for a tone arm for use with a phonograph record player or the like where the bearing system includes a bracket for supporting the tone arm, a rotatable, tubular shaft connected to the bracket for permitting horizontal rotation of the tone arm, and a support for bearing the shaft including ball bearings or the like, the improvement of a suspension wire connected to the bracket at the upper end thereof and extending through the rotatable, tubular shaft; and a device for applying tension to the suspension wire to lessen undesirable movement of the shaft. The tension applying device preferably applies the tension to the suspension wire magnetically and may include a first magnetic structure connected to the lower end of the suspension wire and a second, fixedly positioned magnetic structure spaced from the first magnet structure where at least one of the first and second magnetic structures is a magnet.

Abstract: A phonograph pickup arm for use in disc records arranged to compensate for error in the tracking path. By use of adjacent curved surfaces in mounting and support members the point of rotational access of the pickup arm shifts as the stylus associated with the pickup arm moves left to right or vice versa to compensate for the usually present tracking error.

Abstract: This invention concerns a tone arm of the type in which a separate element is supporting the extending parts of the arm. This separate element is comprising the suspension point around which the arm is moving, and it differs from the type of those elements already known thereby, that said suspension point is placed excentrically with respect to the center of gravity of the said separate element, which is made of solid material in such a way, that the said element is giving almost no contribute to the total inertial moment of the tone arm as to the suspension point, even if it is comprising electrical joints and attachment of arm tube or -rod above the suspension point.