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Dynamic magnetic information storage or retrieval

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Class / Patent application numberDescriptionNumber of patent applications / Date published
360069000 AUTOMATIC CONTROL OF A RECORDER MECHANISM 995
360110000 HEAD 979
360240000 HEAD MOUNTING 525
360088000 RECORD TRANSPORT WITH HEAD STATIONARY DURING TRANSDUCING 377
360055000 GENERAL RECORDING OR REPRODUCING 347
360031000 MONITORING OR TESTING THE PROGRESS OF RECORDING 316
360039000 GENERAL PROCESSING OF A DIGITAL SIGNAL 284
360230000 FLUID BEARING HEAD SUPPORT 263
360131000 RECORD MEDIUM 187
360015000 RECORD COPYING 53
360081000 RECORD TRANSPORT WITH HEAD MOVING DURING TRANSDUCING 28
360220000 FLUID BEARING RECORD SUPPORT 17
360032000 CONVERTING AN ANALOG SIGNAL TO DIGITAL FORM FOR RECORDING; REPRODUCING AND RECONVERTING 13
360029000 MODULATING OR DEMODULATING 12
360025000 CHECKING RECORD CHARACTERISTICS OR MODIFYING RECORDING SIGNAL FOR CHARACTERISTIC COMPENSATION 7
360001000 RECORDING ON OR REPRODUCING FROM AN ELEMENT OF DIVERSE UTILITY 5
20080198487Single step method for transferring digital motion pictures to movie theater systems - The disclosure is directed to techniques for transferring data files representing a digital motion picture to a motion picture system within a theater in a single step. More specifically, the techniques allow a user to press one button to initiate the transfer, or upload, of a plurality of data files stored on a data tape to a predetermined location within a data storage device within the theater. The single input from the user frees the user from completing the plurality of steps needed to manually select a desired data file from the data tape and find the location to transfer the data file. Instead, the data tape or user system may automatically identify the entire plurality of data files and the predetermined location at which to store the plurality of data files. The techniques facilitate the distribution of motion pictures from motion picture studios to theaters using magnetic tape media.08-21-2008
20090046385MAGNETIC RECORDING DISK AND DISK DRIVE WITH AMPLITUDE-TYPE SERVO FIELDS HAVING PATTERNED ALTERNATING-POLARITY SERVO ISLANDS FOR READ/WRITE HEAD POSITIONING - A magnetic recording disk drive has a disk with pre-patterned nondata servo sectors extending generally radially across the data tracks for use in positioning the read/write heads on the data tracks. The servo sectors include a synchronization pattern of generally radially directed magnetized marks, a first field of generally radially directed magnetized stripes, and a second field of generally radially directed magnetized stripes. Each stripe in each of the two fields comprises a plurality of radially spaced discrete islands, each island having a radial height of approximately Tp, where Tp is the spacing of the track centerlines in the radial direction. In the first field, the islands are centered at a track centerline, and in the second field the islands are centered at the midline between two adjacent track centerlines. The marks and islands are discrete magnetized regions separated by nonmagnetic spaces. The marks in the synchronization pattern and the stripes in the two fields have alternating polarity of magnetizations in the along-the-track direction.02-19-2009
20110170211DEVICE AND METHOD FOR CONTROLLING BIT DENSITY OF MAGNETIC CARD - A device and a method for controlling a bit density of a magnetic card (07-14-2011
20120002313CARD READER AND CONTROL METHOD OF CARD READER - The present invention is to provide a card reader that can prevent the illegal acquisition of magnetic information recorded on a magnetic stripe, based on an output signal from a pre-head. More specifically described, in a card reader having a card insertion slot for guiding a magnetic card having a magnetic stripe to a transport passage and a pre-head arranged in the vicinity of the card insertion slot for detecting the presence of the magnetic stripe, the pre-head is equipped with a head portion having at least one pair of magnetic cores arranged to be opposite from each other having a magnetic gap between them and coils wound around a pair of the magnetic cores; and a signal different from that of the magnetic information recorded on the magnetic stripe is output from the pre-head.01-05-2012
20120092786NON-CONTACT INFORMATION PROCESSING DEVICE AND NON-CONTACT CARD MEDIUM ISSUING MACHINE - A non-contact information processing device and a non-contact card medium issuing machine that can easily and quickly judge whether an electromagnetic radiation function of a non-contact communication antenna is working properly or not. Concretely to describe, provided is a card reader that includes non-contact information processing means for recording and/or reproducing information through electromagnetic induction without contacting a card medium; and a transfer path for transferring the card medium. The non-contact information processing means has a device-side non-contact communication antenna that is able to send and receive information to/from a medium-side non-contact communication antenna provided on the card medium. Provided is detection means for detecting if the device-side non-contact communication antenna is working normally. The detection means has a control section, being independent of a control circuit for controlling the device-side non-contact communication antenna, and detects an electromagnetic wave generated from the device-side non-contact communication antenna.04-19-2012
360137000 MISCELLANEOUS 4
20080259496MAGNETIC DISK PROTECTION MECHANISM, COMPUTER SYSTEM COMPRISING PROTECTION MECHANISM, PROTECTION METHOD FOR MAGNETIC DISK, AND PROGRAM FOR PROTECTION METHOD - A mechanical transport device includes a system for transport; and a hard disk drive attached to the system. The hard disk drive comprises a magnetic recording disk to record data, a head to read or write the data to or from the disk, and a drop sensor designed to sense a shock condition. The system for transport may be a vehicle such as a car. Additional systems are also presented10-23-2008
20090086373DISK DRIVE WITH TURBULENCE REDUCTION PLATE - A method for assembling a disk drive includes placing disks on a spindle, and pivoting a turbulence reduction plate to a position between the disks on the spindle. The turbulence reduction plate is placed on a pivot associated with the housing and then rotated into position. The turbulence reduction plate is attached to the housing and a cover is placed onto the housing to form a disk enclosure which also encloses the turbulence reduction plate.04-02-2009
20090002887Double electrode cantilever actuation for seek-scan-probe data access - A seek-scan-probe memory device, utilizing a media electrode to allow active cantilevers to contact the storage media, and a pull electrode to pull up cantilevers away from the storage media when in an inactive mode. Other embodiments are described and claimed.01-01-2009
20090059430FABRICATING MAGNETIC RECORDING MEDIA ON PATTERNED SEED LAYERS - Patterned media and associated methods of fabrication are provided in which vertical magnetic grains are grown on a patterned seed layer. The patterned seed layer includes a matrix of islands of a first seed material. Each island of first seed material is separated from other islands by a region of second seed material. The first seed material is selected to initiate growth of magnetic material, and the second seed material is selected to initiate growth of non-magnetic material. Subsequently, magnetic material is grown on the first seed material and non-magnetic material is grown on the second seed material. Deposition may be simultaneously. The magnetic and non-magnetic materials form well-defined vertical columns over the first and second seed materials respectively. Thus, each island behaves as an isolated magnetic unit, which switches independently from its neighbor units, which are magnetically separated by the non-magnetic material.03-05-2009
360027000 RECORDING OR REPRODUCING AN INFORMATION SIGNAL AND A CONTROL SIGNAL FOR CONTROLLING ELECTRONICS OF REPRODUCER 3
20090153991METHODS AND APPARATUS TO PROVIDE DYNAMICALLY-BIASED WRITE DRIVERS FOR HARD DISK DRIVE (HDD) APPLICATION - Methods and apparatus to provide dynamically biased write drivers for hard disk drive applications are described. According to one example, a hard disk drive write system includes a drive signal generator to receive data to be written to a hard disk drive platter and to generate drive signals including a boost signal. A drive circuit is configured to receive the drive signals and to generate currents for output to the transmission line based thereon, wherein the currents include a boost current. A variable bias circuit is configured to detect the boost signal generated by the drive signal generator and to vary a bias signal provided to the impedance matching circuit based on the detection of the boost signal. In such an example arrangement, the impedance matching circuit matches impedances between the drive circuit and the transmission line in response to the bias signal provided by the variable bias circuit.06-18-2009
20090141383SETTING METHOD OF MAGNETIC DISK APPARATUS AND MAGNETIC DISK SETTING APPARATUS - A gain setting apparatus that externally performs setting of a magnetic disk apparatus before shipment causes a servo data gain setting unit to set a servo data gain for a preamplifier. The gain setting apparatus then causes a core deviation correction processor to set the servo data gain as a provisional user data gain, so as to perform core deviation correction for correcting positional misalignment between a read core and a write core. Further, the gain setting apparatus causes a user data gain setting unit to set the user data gain for the preamplifier.06-04-2009
20120105992METHOD AND CIRCUITRY FOR PROGRAMMABLY CONTROLLING DEGAUSS WRITE CURRENT DECAY IN HARD DISK DRIVES - A control circuit to provide a control current to control an amplitude of a write current in a magnetic media drive. The control circuit has an output circuit for providing the control current with an amplitude dependent on a bias voltage. A bias current path provides the bias voltage to the output circuit, and a current diverting circuit is connected to divert current from the bias current path. A programmable ramp voltage generator operates in response to a degauss enable signal, and a voltage-to-current converter receives the programmable ramp voltage to control the current diverting circuit to divert current from the bias current path at a rate determined by the programmable ramp voltage. The bias voltage and the write current decay according to the programmable ramp voltage. The write current decay can be made linear and independent of a beginning write current amplitude.05-03-2012
360026000 ELECTRONICALLY CORRECTING PHASING ERRORS BETWEEN RELATED INFORMATION SIGNALS 3
20110032630MULTI-MODE LOOP ADAPTATION SCHEME FOR HIGH-DENSITY DATA RECORDING CHANNEL - A circuit for a high-density data recording channel includes a first data detector, a second data detector, one or more multiplexers and a sequence identifier. The first data detector generates a first data detector output, and the second data detector generates a second data detector output. The multiplexers change between a first mode and a second mode to alternately receive the first data detector output and the second data detector output. The sequence identifier receives a data sequence including at least one of a first data sequence, such as VFO data, and a second data sequence, such as random data. The second data sequence includes a greater number of signal levels than the first data sequence. The sequence identifier changes the multiplexers between the first mode and the second mode based on whether the data sequence is the first data sequence or the second data sequence. The data sequence includes a plurality of timing stages. The sequence detector can at least partially control a loop bandwidth of the circuit based on the timing stage of the data sequence.02-10-2011
20100103551DATA SECTOR PHASE CORRECTION METHOD AND DISK DRIVE APPARATUS USING THE SAME - A method to correct a phase of a data sector due to rotational slip of a disk includes measuring a difference in the phase of a servo sector between a plurality of disks and adjusting an amount of cylinder skew of a logical data sector between the plurality of disks based on the measured difference in the phase of a servo sector between the plurality of disks.04-29-2010
20080316629MAGNETIC DATA PROCESSING APPARATUS, METHOD AND MACHINE READABLE MEDIUM - In a magnetic data processing apparatus, an input part successively inputs magnetic data from a magnetic sensor. A first generation part stores samples of the magnetic data in accordance with a first sampling rule, and generates first offset update data based on the stored samples of the magnetic data when a distribution of the stored samples of the magnetic data indicates a first feature. A second generation part stores samples of the magnetic data in accordance with a second sampling rule, and generates second offset update data based on the stored samples of the magnetic data when a distribution of the stored samples of the magnetic data indicates a second feature. An update part updates an offset value of the magnetic data based on the first offset update data when the same is generated, and updates the offset value of the magnetic data based on the second offset update data when the same is generated.12-25-2008
360013000 RECORD EDITING 3
20090128940METHOD AND SYSTEM FOR COMPENSATING FOR TAPE DEFORMATION - A method for compensating for tape deformation in a tape drive includes determining location of deformation on a tape; processing the tape in a first manner before and after the deformation; and processing the tape proximate the deformation in a second manner different than the first manner. The step of processing the tape in the first manner comprises recording data on the tape.05-21-2009
20090002859Data storage tape recertification - The invention is directed to techniques for erasing data storage tape for reuse. In an embodiment, an erase head module for erasing data storage tape comprises a set of erase gaps and one or more servo read elements. The set of erase gaps is configured to coincide with data bands of the data storage tape to allow erasure of only the data bands of the data storage tape while not erasing servo bands of the data storage tape. The one or more servo read elements detect one of the servo bands of the data storage tape when the set of erase gaps are proximate the data bands of the data storage tape to allow the erase head module to accurately track the data bands with the set of erase gaps.01-01-2009
20120170147WRITING DATA TO A TAPE - A method and apparatus for writing data to a tape is disclosed. A plurality of data segments are written onto a tape simultaneously. Any data segments written to the tape that needs to be rewritten are identified. Each data segment that needs to be re-written is accumulated. The accumulated data segments are written to tape when a full set of data segments have been accumulated. The re-written data segments each have a first field in a header that designates itself and a second field in the header that designates a second re-written data segment.07-05-2012
360101000 HEAD TRANSPORT WITH RECORD STATIONARY DURING TRANSDUCING 2
20080198506PIEZOELECTRIC MICRO-ACTUATOR FOR MAGNETIC TAPE READ/WRITE HEAD - The claimed embodiments provide methods, apparatuses and systems directed to a servo-actuated positioner for a read/write head that uses a piezoelectric super fine actuator that moves the read/write head to maintain alignment with data tracks on a magnetic tape. The servo-actuated positioner, in one implementation, uses flexures to mechanically support the read/write head. Piezoelectric elements are attached to the flexures in strategic locations to effect movement of the read/write head when the elements are actuated. This configuration achieves a large actuator motion using small piezoelectric elements. Additionally, manufacturability is improved since the piezoelectric elements, which are typically brittle, are attached to the mechanically robust flexures.08-21-2008
20120039001DISK LIBRARY APPARATUS - A disk library apparatus includes a magazine for housing a plurality of storage disks, a plurality of pallets each having a disk placing surface for placing a storage disk and which are arranged in the magazine so that pallets having different engaging claw shapes are adjacent to each other, and a picker for taking out a pallet selected from the plurality of pallets from the magazine. The picker includes at least one arm for taking out the selected pallet from the magazine in the taking-out of the selected pallet. Each of the at least one arm is, in the taking-out of the selected pallet, engaged with an engaging claw of the selected pallet and in a position shifted from an engaging position with an engaging claw of each pallet adjacent to the selected pallet when seen in a pallet arranging direction.02-16-2012
360079000 RECORDER CONTROL OF AN EXTERNAL DEVICE 2
20120127606SELF-DESCRIBING A PREDEFINED POOL OF TAPE CARTRIDGES - Apparatus and associated method for loading a first tape cartridge into a tape drive, the first tape cartridge formatted to include a user data partition and also to include an index partition, different than and sized smaller than the user data partition, to store an index that self-describes user data designated to the user data partition and to also store non-index data, then reading the non-index data in the index partition of the first tape cartridge to self-describe a second tape cartridge different than the first tape cartridge.05-24-2012
20130128383ELECTRONIC DEVICE HAVING INDICATION CIRCUIT FOR DATA TRANSMISSION RATE OF HARD DISK DRIVES - An indication circuit includes a platform controller hub (PCH), a hard disk drive detector, an indication circuit, and a control circuit. The indication circuit includes a plurality of light-emitting diodes (LEDs). The PCH outputs indication signals to indicate data transmission rates of hard disk drives of an electronic device. The hard disk drive detector outputs present signals to confirm the presence of each of the hard disk drives upon connection of the hard disk drives to the hard disk drive backplane. The control circuit outputs voltage signals to turn on/off the LEDs, according to the indication signals and the present signals.05-23-2013
360018000 RECORDING OR REPRODUCING PLURAL INFORMATION SIGNALS ON THE SAME TRACK 1
20090153990DEVICE FOR EMBEDDING INFORMATION INTO DATA - An object of the present invention is to embed information while making effective use of a recording area at the time of recording data. To this end, a controller in a tape drive includes: a storage unit which stores information desired to be embedded; an acquisition unit which acquires the information stored in the storage unit; a writing unit which repeatedly writes a CQ set determined on the basis of the acquired information the number of times determined on the basis of this information; a reading unit which reads data in which information is embedded; and an identification unit which identifies information embedded in the read data, and which determines whether or not the read data can be used and the like, in comparison with this information and the information stored in the storage unit.06-18-2009
360005000 RECORDING FOR SELECTIVE RETENTION OF A SPECIAL OCCURRENCE 1
20090027795SECURE MODULE RECORDER SYSTEM AND METHOD - Embodiments of a secure module recorder system and method for securing recording and storing of information is provided. The system may include at least one secure module and a docking station having at least one receptacle for holding one of the secure modules. The secure module may include a tamper-resistant case, an input port for receiving an analog signal, a recording circuit for converting the analog signal into digitally formatted data, a memory device for storing the digitally formatted data, a playback circuit for reading the digitally formatted data from the memory device and converting the digitally formatted data into an analog playback signal, and an output port for transmitting the analog playback signal. The docking station may further include a first interface for receiving the analog signal from an external device and a second interface disposed within the receptacle for interfacing with the input port of the secure module.01-29-2009
360008000 RECORDING FOR CHANGING DURATION, FREQUENCY OR REDUNDANT CONTENT OF AN ANALOG SIGNAL 1
20120120517DATA PROCESSING SYSTEM HAVING DATA REPRODUCTION INDEPENDENT OF DATA PROCESSING - A processing unit performs a method including controlling a reading-out of data from a first storage medium at a predetermined read-out data rate to produce inputted data, and controlling a compression of the inputted data to produce first compressed data of a first compressed format. The method includes controlling a storage of the first compressed data in a second storage medium at a faster writing data rate than the predetermined read-out data rate, controlling a reading-out of second compressed data of a second compressed format from the second storage medium, and controlling a decompression of the second compressed data to produce decompressed data. The method also includes controlling simultaneously the storage of the first compressed data in the second storage medium, the reading-out of the second compressed data from the second storage medium, and audibly reproducing the decompressed data. The first compressed format is different from the second compressed format.05-17-2012
360024000 SPLITTING, PROCESSING AND RECOMBINING ONE INFORMATION SIGNAL FOR RECORDING OR REPRODUCING ON THE SAME TRACK 1
20120307389TRACK-DEPENDENT DATA RANDOMIZATION MITIGATING FALSE VFO DETECTION - A method for randomizing data to mitigate false VFO detection is described. In one embodiment, such a method includes simultaneously receiving multiple input data streams. Each input data stream is associated with a different track on a magnetic tape medium. The input data streams are simultaneously scrambled to produce multiple randomized data streams. The input data streams are scrambled such that different bit patterns are produced in the randomized data streams even where corresponding bit patterns in the input data streams are identical. The randomized data streams are simultaneously written to their associated data tracks on the magnetic tape medium.12-06-2012

Patent applications in class Dynamic magnetic information storage or retrieval

Patent applications in all subclasses Dynamic magnetic information storage or retrieval