Bizarre Patents
User-operated amusement apparatus for kicking the user's buttocks
An apparatus including a user-operated and controlled apparatus for self-infliction of repetitive blows to the user's buttocks by a plurality of elongated arms bearing flexible extensions that rotate under the user's control.
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| Number | Title | Issue Date |
| 7224548 | Determining contact write current in disk drive using position error signal variance In a disk drive, a contact write current that causes head-disk contact due to pole tip protrusion is detected using a variance of a position error signal (PES). A method of determining the contact write current includes generating PES's in response to the head readi... | 05/29/2007 |
| 7206170 | Thin film servo head apparatus with canted servo gaps A thin film servo head apparatus is described that provides verification of time-based servo marks on a magnetic tape. The thin film servo head apparatus includes a plurality of thin film servo heads formed in a substrate. The substrate is canted such that servo gap... | 04/17/2007 |
| 7127799 | Head gimbal assembly method The present invention provides a method for assembling a head gimbal assembly useful in a hard disk drive and for testing such an assembly. In a method in accord with the present invention a head/slider is mounted to a circuited gimbal in an automated assembly machi... | 10/31/2006 |
| 7027251 | Method and apparatus to control pole tip protrusion A method and apparatus to control the amount by which thermal expansion causes a write head to extend toward a disk is provided. In one aspect, a single write operation uses two or more different write currents. A first write current is initially used, and is large ... | 04/11/2006 |
| 7023645 | Read error recovery method and apparatus The present invention provides a method and apparatus for recovering data in a disk drive following a read error. At least a portion of the actuator arm tip is heated. Thermal expansion reduces the read-head-to-disk spacing, increasing the likelihood of success when... | 04/04/2006 |
| 6952867 | Method for manufacturing perpendicular magnetic recording head having inverted trapezoidal main magnetic pole layer The side edge of the main magnetic pole layer is prevented from protruding in the track width direction even when a skew angle is generated by forming the main magnetic pole layer of the opposing face opposing the recording medium as an inverted trapezoid, thereby e... | 10/11/2005 |
| 6952320 | Virtual tracks for repeatable runout compensation The present invention relates to repeatable runout (RRO) compensation of servo control systems that can be used in disc drives or spin-stands. The RRO relates to eccentricity between servo tracks, which were written onto a disc prior to the installation of the disc ... | 10/04/2005 |
| 6865057 | Gapless longitudinal magnetic recording head with flux cavity A longitudinal recording head for use with magnetic recording media includes a gapless yoke with a cavity that expels magnetic flux onto a small area of the magnetic recording medium. Longitudinal recording heads incorporating the gapless yoke and flux cavity are ca... | 03/08/2005 |
| 6747830 | Perpendicular magnetic recording/reading apparatus The maximum external magnetic field of a magnetic recording medium longitudinal component which is applied to a magnetic recording medium is smaller than an absolute value Hn of a magnetic field at the intersection of a straight line connecting two points... | 06/08/2004 |
| 6700720 | Ultrafast magnetization reversal A scheme for ultrafast magnetization reversal in an in-plane magnetized layer (3) is disclosed. For that, an external magnetic field Hex is applied such that the magnetization M precesses around the external magnetic field Hex and th... | 03/02/2004 |
| 6620530 | Synthetic anti-parallel spin valve, having improved robustness, and process to manufacture it A spin valve structure and a method for manufacturing it are described. The spin valve uses a modified pinned layer that consists of two cobalt iron layers separated by a layer of either ruthenium, iridium, or rhodium. A key feature of the invention is th... | 09/16/2003 |
| 6473258 | Magnetic disk read/write circuit having core coils of opposite phase A magnetic disk read/write circuit comprises a core having a pair of coils wound such that signals supplied to the coils becomes opposite in phase and a read circuit having a first input terminal connected to one of terminals of a read head through one of... | 10/29/2002 |
| 6262856 | Magnetic information reproducing apparatus having power supply field cancellation facility A magnetic information reproducing apparatus includes a head which reads magnetic information from a magnetic recording medium, and an electric wire for supplying electric power from a power supply to a load, the electric wire being so disposed as to gene... | 07/17/2001 |
| 6256864 | Process for producing an assembly having several magnetic heads and multiple head assembly obtained by this process Process for the production of an assembly having several magnetic heads and multiple head assembly obtained by said process. Production takes place of a first substrate (60) with first pole pieces (621, 622) and a second substrate (70) wi... | 07/10/2001 |
| 6134384 | Digital signal recording/reproducing apparatus and recording method An apparatus and method for recording on and reproducing from a magnetic tape a digital signal by rotating heads. A synchronizing signal, a control signal, and an error correction code are added to the digital signal, and the digital signal with those sig... | 10/17/2000 |
| 6115217 | Multi-element read/write tape head with low feedthrough Read-while-write feedthrough is reduced in a tape deck having a multi-element read/write tape head. The tape deck includes write circuits for converting a substream of a data stream into an electrical signal. The read/write head has a sequence of write el... | 09/05/2000 |
| 6008719 | Electrical control device with crosstalk correction, and application thereof to magnetic write/read heads This electrical control device with crosstalk correction includes several devices each electrically controllable by a limiter resistor. The current limiter resistors are resistive limiter elements in plane layers positioned on a first substrate face. At l... | 12/28/1999 |
| 5912779 | Method of reading and writing data on a magnetic medium A multiple-gap head for transferring data to or from a storage medium is disclosed. Data read by the gaps are directed over a plurality of serial data paths where the data are processed and synchronized. In some embodiments, all or part of a data synchron... | 06/15/1999 |
| 5896239 | Magnetic disk writing method and a magnetic disk apparatus A method and disk apparatus, for writing data disk apparatus, that reduces the adverse influence of noise caused by data head writing on a read signal of a servo head even though the data head and the servo head are collaterally paired with no disks there... | 04/20/1999 |
| 5883750 | Method and system for the magnetic recording of information elements and information medium by providing current correction for cross-talk magnetic flux A method and system of magnetic recording of information elements on several parallel tracks whereby the recording of information elements on a track is accomplished by inducing a magnetic field having a predetermined direction in a zone on the track and,... | 03/16/1999 |
| 5842269 | Processes for producing a double magnetic head having head gaps with opposite azimuths A process for producing a double magnetic head with two head gaps with opposite azimuths by forming a first magnetic head with a first head gap having a predetermined inclination angle on a first substrate and a second magnetic head having a second head g... | 12/01/1998 |
| 5834999 | Transducer for a stringed musical instrument A transducer for a stringed instrument comprises a first uppermost coil, and a second lowermost coil with the axes of the coils coincident. At least one permanent magnet pole piece associated with the coils and a shield of magnetically permeable material ... | 11/10/1998 |
| 5668520 | Transducer for a stringed musical instrument A transducer for a stringed instrument comprises a first uppermost coil and a second lowermost coil with the axes of the coils coincident. Permanent magnet pole pieces are arranged in the first coil and metallic non-magnetized pole pieces are arranged in ... | 09/16/1997 |
| 5644457 | Multiple gap read/write head for data storage devices A multiple-gap head for transferring data to or from a storage medium is disclosed. Data read by the gaps are directed over a plurality of serial data paths where the data are processed and synchronized. In some embodiments, all or part of a data synchron... | 07/01/1997 |
| 5485435 | Magnetic field generator in which an end face of a magnetic material member projects from man end face of magnetic field generating cores A magnetic field generator includes a base, a plurality of magnetic field generating cores formed on the base, magnetic field generating coils respectively wound around the plurality of magnetic field generating cores, a magnetic material member being dis... | 01/16/1996 |
| 5471354 | Servo head with close servo transducer placement for improved passive noise cancellation A servo head in a disk file data storage system includes two servo transducers which are connected so that noise induced by a nearby writing data head cancels. The first servo transducer, mounted on a slider, reads information stored on a servo disk. A se... | 11/28/1995 |
| 5461528 | Self bucking servo transducer A servo head in a disc file data storage system includes a servo transducer and a coil which are connected so that noise induced by a nearby writing data head cancels. The servo transducer, mounted on a slider, reads information stored on a servo disc. Th... | 10/24/1995 |
| 5245494 | Write-read magnetic recording head A write-read magnetic head for write-read digital recording machines includes a write magnetic head and a read magnetic head disposed in closely spaced apart relation. Each head includes a shield formed of a ferrous containing material having an opening t... | 09/14/1993 |
| 5239433 | Magnetic head device A magnetic head apparatus arranged such that, for preventing a crosstalk between a plurality of magnetic heads, a crosstalk preventing element is coupled through a switching element in parallel to an erasing coil of each of the magnetic heads and a contro... | 08/24/1993 |
| 5210669 | Methods of improved servo head passive noise cancellation by placement and orientation of multiple servo transducers A servo head in a disk file data storage system includes two servo transducers which are connected so that noise induced by a nearby writing data head will cancel. The two servo transducers are located an equal distance from the data transducer. The pole ... | 05/11/1993 |
| 5198948 | Shielded servo heads with improved passive noise cancellation A servo head in a disk file data storage system includes at least one shield which acts to block radiation emanating from a nearby data head and thus reduce noise induced in the servo head. The shield is located on either side of an essentially flat condu... | 03/30/1993 |
| 5195003 | Magnetic head device including crosstalk prevention circuit Crosstalk prevention means or short-circuit means is connected in parallel to an erasing coil for erasing part of data prior to recording the data by a read/write coil, whereby a cancelling magnetic flux for erasing a crosstalk magnetic flux is generated ... | 03/16/1993 |
| 5144741 | Method of manufacturing a magnetic head with two canted gaps A core block almost square in cross section has two winding grooves cut in its two polished sides forming one of its four corners. The grooved sides of the core block are vapor-deposited with a gap spacer to form magnetic gaps. Two side blocks, which have... | 09/08/1992 |
| 5134534 | Thin-film magnetic head with enhanced crosstalk reduction In a thin-film magnetic head including a magnetic circuit which is composed of upper and lower magnetic layers and a coil made of a conductive layer, a magnetic shield layer made of a conductive material is provided on the upper magnetic layer; and the in... | 07/28/1992 |
| 5122916 | Electromagnetic head having interference compensation circuitry In a magnetic sensing head with reduced crossfeed interference circuitry, the winding of each half of a magnetic core of the head is wound in the same direction as the other about the core. Each winding is coupled to an individual differential amplifier a... | 06/16/1992 |
| 5075956 | Method of making recording heads with side shields A recording head includes at least one magnetic pole and magnetic side shields adjacent to the pole, the side shields disposed to shield the pole from adjacent tracks on a magnetic medium. Embodiments are disclosed for both longitudinal and vertical recor... | 12/31/1991 |
| 5022141 | Method for manufacturing multiturn thin film coil A method of manufacturing a multiturn coil and a thin film magnetic head including a multiturn coil. This multiturn coil manufacturing method includes the following steps. First a laminate made up of conducting layers and insulating layers for coil is for... | 06/11/1991 |
| 4984117 | Device with read head for magnetically recorded information A device with a read head (16) for magnetically recorded information in electronic data processing plants, in particular in document processing systems, is subject to disturbances by the document operation systems, where modular device units cause magneti... | 01/08/1991 |
| 4965681 | Magnetic recording apparatus of rotary magnetic type having cross-talk cancelling function A magnetic recording apparatus of the rotary head type has a cross-talk cancelling function. A plurality of rotary magnetic heads are used to record signals on a magnetic recording medium and a correction signal is formed by using a record signal which is... | 10/23/1990 |
| 4962437 | Thin film servo head employing the inactive transducer coils to cancel write noise from nearby data heads A disc drive servo head having two thin film transducers, one of which is disabled from reading by lapping away its pole tips. The coils of the disabled transducer are oppositely wound from the usable transducer's and induce an equal and opposite signal f... | 10/09/1990 |
