Matches 1 - 38 out of 38
Match Document Document Title
7480924 Magnetic recording and reproducing device and magnetic recording medium  
A magnetic recording and reproducing device includes: a magnetic recording medium in which a magnetic recording layer is formed in a concavo-convex pattern so that tracks are formed by convex...
7411793 Optical disk device  
An optical disk device of the present invention has a main PC board carrying a semiconductor element and attached at the rear of a drawer to efficiently dissipate a heat generated from the...
7310206 Magnetic thin film head with heat-assisted write section and hard disk drive incorporating same  
A thin film magnetic read/write head for use in magnetic data storage systems to enable writing of data to a magnetic data storage medium with the assistance of laser heating. The read/write head...
7307923 Electro magnetic field generating element, information recording and reproducing head and information recording and reproducing device  
To realize an electromagnetic field generating element, an information recording and reproducing head and an information recording and reproducing device for high frequency magnetic recording and...
7242644 Optical disk drive, and a method of assembling it  
An optical disk drive includes an optical pick-up unit having a fixed part with at least a light source, and a movable part mounted on a guide. The movable part includes a mirror, a focusing lens,...
7191456 Optical pickup head feeding device  
An optical pickup head feeding device ( 1 ) for driving an optical pickup head ( 4 ) of an optical recording/reproducing apparatus ( 100 ) has a motor ( 11 ), a motor housing ( 12 ) accommodating...
7184371 Optical pickup driver having piezoelectric elements of different voltages at start and steady state  
The present invention is directed to a drive device comprising an electromechanical transducer ( 25 ) attached to one end of a drive shaft ( 24 ) and adapted to be expanded and contracted in the...
7155732 Heat assisted magnetic recording head and method  
A magnetic recording head comprises a write pole having a pole tip adjacent to an air bearing surface, a return pole, a near field transducer positioned adjacent to the air bearing surface for...
7106668 Disk drive apparatus  
A disk drive apparatus for a disk having helically-formed or concentric circle-like formed tracks includes a spindle motor for controlling a rotation of the disk; a pick-up device for recording or...
7080390 Power transmitting device for stepping motor and disk drive provided with the same  
A power transmitting device for a stepping motor comprises: a stepping motor commonly serving as a power source for a pickup moving mechanism of a light load and a power source for a disk...
7069568 Record head for thermally assisted magnetic recording  
A record head for the thermally assisted magnetic recording on a storage medium. The head has an inductive section, which includes a magnetic circuit having a record flux guide ending in a record...
7047540 Gear rack arrangement having resiliently braced gear racks and anti-detachment means  
The invention relates to a gear rack arrangement, which, for the compensation of backlash, comprises two gear racks (A, B) which are mutually displaceable on latch elements and are resiliently...
7003787 Urging structure for an output shaft of a drive motor  
An urging structure for an output shaft of a drive motor of the invention is configured by a pressing plate 31 which abuts against an end face 24 a of an output shaft 24 , and an urging spring...
6901598 Tilt focus method and mechanism for an optical drive  
The present invention relates to a method and apparatus for dynamically positioning the objective lens in an optical disk drive to maintain focus despite loss of perpendicularity between the light...
6854125 Magnetic head  
A magnetic head is configured so that an aspect ratio w 0 /h 0 of a cross section of a coil ( 11 ) is set to be 1 to 4, or preferably, approximately 1.5. This configuration suppresses the heat...
6801493 Optical pickup device  
An optical pickup device including a slider on which an objective lens is mounted and which is elastically movably supported by a support member, an air bearing member provided in the slider so...
6795970 Disk loading apparatus with floatable clamp means  
In a disk loading apparatus according to the present invention, a clamp section is configured so as to be floatable in a direction perpendicular to the direction of disk insertion and so as to be...
6738334 Optical memory apparatus having a base with a unitary and integral optical component mounting portion and a precision mounting surface for mounting an optical component  
A miniaturized optical disc memory is receivable in a slot, of about 17 mm height, normally accommodating a floppy disc drive. A base includes a base plate with integral, peripheral sidewalls and...
6707782 Information recording/reading apparatus having adjustable stopper  
An information recording and/or reading apparatus has a base plate, a spindle motor for rotating a disk by the output shaft perpendicular to the base plate, a rotary alignment control device for...
6665253 Optical disk control mechanism  
An optical disk control mechanism comprising an electric motor, a transmission component, a limiting switch and a sliding plate. The transmission component rotates when driven by the electric...
6590736 Tape or disc record player equipped with standby power-saving means  
Disclosed is an improvement in a record player for turning the information stored on a cassette tape or a compact disc back into the original forms including a recording medium loading mechanism...
6381207 Optical pickup movable to control beam shift and field angle in an optical disk drive  
An optical pickup of an optical disk drive. The optical pickup includes a laser beam source for generating a laser beam; a pickup base having an objective lens for projecting the laser beam...
6353590 Media stabilization for laser servowriting  
The present invention provides methods and apparatus for stabilizing data storage media during laser servowriting of optical servo tracks on the media. The apparatus includes a spindle for rotating...
5828642 Device and method for reducing power consumption in a disk drive  
A device and method for reducing power consumption in a data storage disk drive to sense whether a disk is loaded in the disk drive. The device and method further operate to couple a drive power...
5828512 Information processing apparatus having a floating-type head  
An information reproducing apparatus which has a rotative driver for rotating a disc-shaped recording medium, a floating-type head for reproducing information recorded in the recording medium while...
5677904 Disc player  
A disc player includes: a plurality of pickup devices for reading information from a disc; and a plurality of guide devices having a longitudinal axis for transferring the pickup device, the...
5548575 Transverse control device for optical head having a pulse-driven coarse positioning actuator and a precision actuator  
The present invention aims at providing an optical head feed device capable of driving stably a coarse positioning actuator even in presence of fluctuation in static frictional force and/or load...
5548568 Optical-information-recording apparatus having fine and rough driving control  
An information recording-reproducing apparatus for optically effecting the recording and/or reproduction of information on a disk-like recording medium having a plurality of tracks thereon includes...
5453972 Optical disk apparatus  
A portable-type disk apparatus for a 3.5-inch or less optical disk implemented in a thin, light-weight and miniaturized structure having a vibration-withstanding capability. An optical head...
5357498 Disc drive apparatus that positions an objective lens within a disc cartridge at the time when the disc is rotated  
A recording and/or reproducing apparatus is disclosed in which informational signals are recorded and/or reproduced by irradiating an optical disc 202 with a light beam from an optical pick-up...
5313445 Reproducing apparatus with suspension supporting a floating-type head with a bevelled slider  
An information reproducing apparatus which has a rotating driver for rotating a disc-shaped recording medium, a floating-type head for reproducing information recorded in the recording medium while...
5175724 Capacitance disc information retrieval system  
A system for retrieving information on a random basis from a disc having the information thereon in a spiral path around the disc. The system includes a turntable rotatable about a central spindle...
4870635 Precision measurement and positioning system for disk storage system  
The invention uses a small sized, low cost, high accuracy, semiconductor laser interferometer to position the transducer in a disc storage system. Light is reflected back over the path to be...
4262912 Phonograph tone arm control device  
A device for selectively and automatically moving a phonograph tone arm vertically or horizontally includes a horizontally disposed endless belt which supports the tone arm and transports it in a...
4004081 Optical videodisc pickup arm with moving coil drive means  
The arm carrying the optical head that projects and focuses a light beam onto a record trace on a video disc record is provided with a tracking movement by mounting the arm on an...
3977684 Playback apparatus, in particular a video player  
A playback apparatus, in particular a video player, for playing back round disks, which are provided with information tracks which are optically readable with the aid of a read beam obtained from a...
3947888 Hydrodynamic bearing head providing constant spacing  
A player for video disc includes a vacuum reading head to "read" recorded information from a thin, flexible video disc. A rotating turntable provides a fluid cushion bearing to support the disc and...
3724860 OPTICAL DISC DRIVE FOR ORGAN  
An electronic organ of a type that utilizes an optical disc record to generate sounds, which is constructed to allow rapid and easy installation and removal of disc records, including an organ...
Matches 1 - 38 out of 38