Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 8081398 | Thin-film magnetic head having function of adjusting closure height Provided is a thin-film magnetic head, in which the magnetic spacing can be controlled appropriately, regardless of the presence of the variation in height of the medium-opposed surface of the closure. The thin-film magnetic head includes: at least one head element ... | 12/20/2011 |
| 7420781 | Head actuator assembly for a tape drive A head actuator assembly includes a coarse positioner base assembly that is mounted on a guide shaft and an anti-rotation shaft and provides increased structural rigidity due to a four-point support and spring loading of the coarse positioner base against the anti-r... | 09/02/2008 |
| 7382581 | Tape head having a support plate with contoured surface A tape recording head is provided comprising a support plate having a contoured surface with an opening in the contoured surface which allows head chips to protrude far enough to allow proper head tape contact for recording. The support plate is fixed on a coarse ac... | 06/03/2008 |
| 7379259 | Head actuator design for a low profile tape drive A head actuator design for a low profile tape drive is configured with a damping system for a head suspension system having flexure springs to accommodate a half-high form factor. The damping system employs hall sensors, for example, mounted on the head carriage tha... | 05/27/2008 |
| 7359160 | Magnetic head device and linear tape drive including a multi-element magnetic head chip and twin bimodal actuators In general, the invention provides a magnetic head device and linear tape drive that increase the resonant frequency and the range of a servo system. In particular, the invention provides a magnetic head device comprising a magnetic head chip with multiple magnetic ... | 04/15/2008 |
| 7347370 | Self-aligning magnetic read head incorporating lift-up detection Magnetic reading head assemblies are described that enable the alignment of a magnetic reading head to a track of magnetic information on a data card. In addition, embodiments of the present invention can enable the detection of misalignments in circumstances where ... | 03/25/2008 |
| 7342738 | Positioning head assembly for data storage system with multiple degrees of freedom The Invention Provides a Positioning System for a Linear Data Storage Medium, Such as magnetic tape or other data storage medium in which data is stored on parallel data tracks that extend along a length of the medium. The invention makes use of multiple actuators t... | 03/11/2008 |
| 7342748 | System with matrix array of write heads and matrix array of magnetoresistive (MR) read heads The invention provides a system comprising a non-linear array of magnetoresistive (MR) heads arranged in a two-dimensional matrix for reading information stored on magnetic media. The non-linear array of MR heads may comprise a planar array formed by a plurality of ... | 03/11/2008 |
| 7339768 | Magnetic head device and linear tape drive including a twin bimodal type actuator and a dampening structure In general, the invention provides a magnetic head device and linear tape drive that widen the high frequency side of the servo range. In particular, the invention provides a magnetic head device comprising a magnetic head chip with multiple magnetic elements arrang... | 03/04/2008 |
| 7327103 | Driver and method for control of voice coil motor in disk drive A driver for a voice coil motor in a disk drive includes a sensor that provides a sense current by sensing a coil current in the voice coil motor, a comparator that provides an error current by determining a difference between a command current and the sense current... | 02/05/2008 |
| 7301724 | Transducing head Determining an error in position of at least two heads coupled to a piezoelectric material, and changing a potential applied to a piezoelectric material to reduce the error in position of the at least two heads. ... | 11/27/2007 |
| 7289300 | Piezoelectric motor for moving a carriage along a guide In one embodiment, an actuator comprises a stationary guide, a carriage movable along the guide, and a piezoelectric motor operatively coupled to the carriage and pushing on the guide such that the motor when energized moves with the carriage along the guide. ... | 10/30/2007 |
| 7284254 | Disk cartridge and disk recording medium device having shutter members The present invention relates to a disk cartridge in which a disk-like recording medium such as an optical disk, a magneto-optical disk and a magnetic disk is accommodated within a disk compartment of a cartridge housing, a disk recording medium device in which the ... | 10/16/2007 |
| 7265940 | Magnetic tape head having offset recording/ reproducing sections for simultaneous recording/ reproducing on adjacent tape tracks There is provided a tape recording system and head device. A tape recording system and head device include a plurality of recording sections for recording data signals on a recording medium wherein one recording section of the plurality of recording sections and ano... | 09/04/2007 |
| 7230788 | System and method for tape drive control A system and method for damping the motion of the head of a tape drive is disclosed. The method includes measuring the position of the head over time with a position sensor; damping the motion of the head based on the measured position of the head over time; and tun... | 06/12/2007 |
| 7227724 | Head actuator assembly for a tape drive A head actuator assembly includes a coarse positioner base assembly that is mounted on a guide shaft and an anti-rotation shaft and provides increased structural rigidity due to a four-point support and spring loading of the coarse positioner base against the anti-r... | 06/05/2007 |
| 7218480 | Magnetic detent for transducer positioning mechanism In a tape data storage arrangement, a magnetic detent is provided to maintain a tape read/write head in selected positions with respect to the tape, during data transfer. The tape is mounted on a carriage movable between first and second positions, with respect to a... | 05/15/2007 |
| 7203027 | System and method for measuring the position of a tape drive head A sensor for measuring the position of the head of a tape drive is disclosed. The sensor includes a light emitter movably connected to the head; a light sensor movably connected to the head and rigidly connected to the light emitter and located to receive a beam of ... | 04/10/2007 |
| 7187515 | Method and system for tracking magnetic media with embedded optical servo tracks A method and system for tracking storage media is provided that includes directing light through a first major side of a magnetic recording tape, wherein the tape includes optically detectable indicia embedded within the tape during formation of the indicia. At leas... | 03/06/2007 |
| 7171740 | Tape head module assembly method A tape head module assembly method is disclosed. A first and second module holder are placed in an initial alignment with module holder ends facing each other, the module ends each holding a tape head module. A tape wrap angle between the first and second module is ... | 02/06/2007 |
| 7154701 | Head support structure A head support structure of the present invention is the head support structure for recording/reproducing a servo signal on a magnetic tape, comprises a base portion and a support arm, which is one-side supported at the base portion and provides a head provided posi... | 12/26/2006 |
| 7139156 | Non-penetration of periodic structure to PM A magnetoresistive read head having a corrugated magnetoresistive layer wherein the corrugated section does not encroach on magnetic elements on either end of the magnetoresistive layer. The corrugations in the magnetoresistive layer stabilize the magnetization in t... | 11/21/2006 |
| 7133261 | Tape head having a support plate with contoured surface A tape recording head is provided comprising a support plate having a contoured surface with an opening in the contoured surface which allows head chips to protrude far enough to allow proper head tape contact for recording. The support plate is fixed on a coarse ac... | 11/07/2006 |
| 7099120 | Method for supporting a tape head assembly on an air cushion A method of supporting a transducer head in a read/write application provides an air bearing member that has a bearing surface area. The transducer is reciprocally supported on the air bearing member. Gas is flowed out of the bearing surface area so that the transdu... | 08/29/2006 |
| 7061712 | Mono pole piece for a two stage tape drive actuator An actuator device includes a pole piece and at least one magnet for generating a magnetic field. A coarse positioner having a coil surrounding the pole piece provides coarse actuation in a direction parallel to an axis of the pole piece. A fine positioner having a ... | 06/13/2006 |
| 7031089 | Tape head assembly A tape head assembly comprises a transducer head having plural arrays of transducing elements, the transducing elements comprising at least one of write elements and read elements. The tape head assembly further comprises a set of conditioning elements, the conditio... | 04/18/2006 |
| 6980390 | Magnetic media with embedded optical servo tracks A storage medium is provided that includes a magnetic recording tape having a first side and a second side, and a plurality of optically detectable indicia embedded in a servo layer disposed between the first side and the second side of the tape. The optical reflect... | 12/27/2005 |
| 6937409 | Tape system with adjustable wrap angles and method for adjusting tape wrap angle A method for adjusting a tape wrap angle is described comprising the steps of operating the tape system to generate or regenerate an electrical signal in the head from the tape, either increasing or reducing the tape wrap angle as appropriate until a signal from the... | 08/30/2005 |
| 6728076 | Cartridge having sensor hole to be opened/closed and apparatus and method for driving the same A cartridge having a sensor hole to be opened/closed and a method and an apparatus for driving the same. To improve a problem that a cartridge receiving a DVD-RAM disc which has been once withdrawn therefrom performs the recording process under the same conditions a... | 04/27/2004 |
| 6469860 | Damped tape head The recent trend towards incorporating a higher density of data tracks on magnetic tape has necessitated more accurate mechanisms for positioning tape heads. A system for seeking tracks on a magnetic tape via a fine position adjustment system includes a c... | 10/22/2002 |
| 6442004 | Magnetic head linear actuator assembly for a magnetic data storage drive A magnetic head element linear actuator assembly including a base, a platform, a core, a coil, a plurality of slats and a plurality of magnetic bars. The platform is positioned opposite the base and is configured to maintain a magnetic recording head. The... | 08/27/2002 |
| 6437946 | Coarse and fine positioning device employing a single driving mechanism An apparatus for positioning a transducer includes a fixed frame and a moving frame movably associated with the fixed frame such that the moving frame is movable between a plurality of discrete positions relative to the fixed frame. A carriage is movably ... | 08/20/2002 |
| 6411474 | Carriage and actuator assembly A servo positioned carriage and actuator assembly in which a part of the carriage is positioned within the central portion of the motor. The motor, typically a voice coil motor, includes a coil of electrically conductive windings and a magnet or magnets a... | 06/25/2002 |
| 6404598 | Flexible circuit routing configuration for a fine/coarse positioner for a tape drive Disclosed is a method of increasing the transfer rate of a magnetic tape drive by employing at least one head gap per rail. A flexible printed circuit provides communication between main control circuitry of the tape drive and the head positioning apparat... | 06/11/2002 |
| 6339522 | Magnetic data transfer system with dynamic head-to-tape alignment A magnetic data transfer system includes a tape drive with a magnetic tape cartridge insertable in a cartridge receptacle in the tape drive, and a magnetic data transfer head having at least two data transfer elements disposed in succession along a transp... | 01/15/2002 |
| 6335839 | Magnetic head device including a playback head and a recording head maintaining contact with a film A magnetic head device for reading and recording information from a magnetic recording section of a photographic film has a recording head and a playback head. The playback head and recording head are adjacently positioned by a head base plate. The head b... | 01/01/2002 |
| 6301083 | Video tape recorder In a video tape recorder of the invention, a position adjusting mechanism for adjusting the X distance comprises a support plate 6 having a control head mounted thereon, a pivot pin 16 pivotally supporting an end of the support plate 6 on a chassis 1, a c... | 10/09/2001 |
| 6266215 | Tape drive head assembly and apparatus for mounting a tape drive head to a carriage An apparatus and method for mounting a tape drive head to a carriage that supports the head on the actuator. The method includes the steps of providing an inside corner on either the head or the carriage, providing a mating outside corner on the other of ... | 07/24/2001 |
| 6229674 | Coarse and fine positioning device employing a single driving mechanism A read-write head positioning device and method of operation that provide coarse and fine positioning using only one actuator. The read-write head is mounted on a carriage. The carriage is resiliently mounted to a moving frame. The moving frame is slidabl... | 05/08/2001 |
| 6075678 | Pivoting lever cam guide tape head positioner A fine lateral head positioner for a tape drive includes a frame mounted to a base of a tape transport. A tape head slides laterally along a head guide. A guide beam actuated by a fine position actuator applies limited transverse adjustments to the tape h... | 06/13/2000 |
