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| Number | Title | Issue Date |
| 8064183 | Capacitor based bi-directional degaussing device with chamber Disclosed is an apparatus for destroying electronic memory media by use of a bi-directional degaussing device. The degaussing device utilizes an SCR gate controller to cause bi-directional polarity from a charged capacitor into a sealed chamber containing the magnet... | 11/22/2011 |
| 8009403 | Disk preconditioning apparatus and related method An apparatus and method for preconditioning a magnetic recording disk is provided in which two substantially identical, but opposing, pancake coils are disposed generally parallel to one another with a gap therebetween into which a disk to be preconditioned is inser... | 08/30/2011 |
| 7813100 | Demagnetization circuit of a mobile phone A demagnetization circuit for reducing interference in a mobile phone includes a wave filter, a demagnetization circuit and an audio playing circuit. The wave filter is configured to filter a received audio signal from the mobile phone. The wave filter includes an i... | 10/12/2010 |
| 7724490 | Magnetic disk degaussing device and degaussing method Embodiments in accordance with the present invention provide a degaussing device and a degaussing method capable of efficiently degaussing a magnetic disk, especially, a magnetic disk of the perpendicular magnetic recording system, without resorting to a magnetic fi... | 05/25/2010 |
| 7715166 | Method and reciprocating apparatus for permanent magnet erasure of magnetic storage media A permanent magnet degausser includes at least one magnetic field generator comprising magnetic elements arranged near a media conveyance path and a conveyor for transporting magnetic media through a magnetic media conveyance path. A passive belt or protector plate ... | 05/11/2010 |
| 7710706 | Apparatus and method for demagnetizing shadow mask An apparatus for demagnetizing a shadow mask includes a shadow mask stocker, a cassette in the shadow mask stocker, wherein at least one shadow mask is disposed in the cassette, and a demagnetizing device that generates a magnetic field by an alternating current (AC... | 05/04/2010 |
| 7646579 | Data erasure apparatus and data erasure method Embodiments of the invention prevent a spindle motor from stopping rotation while data on a magnetic disk is being erased by using a permanent magnet. In one embodiment, data in the whole area of the magnetic disk is erased as a consequence of the magnetic disk rota... | 01/12/2010 |
| 7593210 | Permanent magnet bulk degausser One or more pairs of magnet assemblages (14 and 16) are provided with magnetized segments (21-30) arranged in a Halbach-like array. The magnet assemblages (14 and 16) define a gap (18) through which magnetic data stor... | 09/22/2009 |
| 7457095 | Demagnetizing method A method is presented for demagnetizing ferromagnetic components in an alternating field of an externally excited electrical series resonant circuit. A supply voltage having an excitation frequency (f) is applied in parallel to a demagnetization coil having a no-loa... | 11/25/2008 |
| 7415971 | Control circuit for an actuator In a control circuit for at least one actuator, in particular for a capacitive actuator of an injection system of an internal combustion engine, a control current can be applied to the actuator. The control circuit has an inductor, e.g., having a core and hav... | 08/26/2008 |
| 7372653 | Degauss waveform generator for perpendicular recording write head Embodiments of the invention provide a hard disk drive that is capable of performing degaussing promptly and properly and a recording method for use with such a hard disk drive. A hard disk drive according to one embodiment of the present invention comprises a curre... | 05/13/2008 |
| 7353417 | Microcontroller with synchronised analog to digital converter A microcontroller is provided, which includes a control unit (UC), at least one digital to analog converter (DAC) as a peripheral of the said control unit, and a buffer register located between the said control unit and the said converter, receiving data and a first... | 04/01/2008 |
| 7325969 | Container mixer A container mixer comprising a loadbearing device, a mixer arm (5) and a docking unit (6) for holding a container (7). The mixer arm (5) is mounted on the rotatable part of a first rotary device (10) having a horizontal first axis ... | 02/05/2008 |
| 7325968 | Structure for holding either a cylindrical or square shaped container during a mixing operation Apparatus and method for mixing a fluid dispersion disposed in a container having either a cylindrical or a square shape. The apparatus includes a holding structure having a retaining structure connected to a base. The retaining structure prevents lateral movement o... | 02/05/2008 |
| 7324321 | Degaussing apparatus A degaussing apparatus having permanent magnets employing common center poles arranged to obtain a flux level gauss of twice the normal level by arranging permanent magnets to create an enhanced center pole effect having an increased flux path as compared to the use... | 01/29/2008 |
| 7291058 | Method and apparatus for improving media flow The flow of media in shot peening, blast cleaning, and similar equipment is improved by applying a time varying magnetic field to the media to thereby degauss the media, allowing the media to flow through equipment without clogging and clumping due to magnetic attra... | 11/06/2007 |
| 7265925 | Recorded data deleting device for hard disk A recorded data eraser 1 defines therein a cavity 2 for insertion of a hard disk drive 20 in the cavity 2 and includes a coil 4 being arranged around the cavity 2 so as to encircle the hard disk drive 20 when the hard... | 09/04/2007 |
| 7228379 | Systems and methods for removing data stored on long-term memory devices An application specific device for erasing data from a long-term storage device includes a power supply, a control circuit, and an interface to the storage device. The control circuit controls the long-term storage device to irretrievably remove data from the storag... | 06/05/2007 |
| 7196894 | Method and a device for demagnetising objects The method according to the invention for demagnetization is effected in two separate steps. Firstly magnetically hard locations, such as weld seams, pressure locations etc., of an object to be demagnetized is pre-treated locally with high fields by way of choke coi... | 03/27/2007 |
| 7171342 | Method for determining magnetization and the field radiated by a ferromagnetic plate The invention concerns the field of devices and appliances for measuring the intensity and the direction of the magnetic field emitted by a plate or a structure, such as for example a ship's hull and it particularly concerns a method for determining the magnetisatio... | 01/30/2007 |
| 7164569 | Mechanism for automated permanent magnet degaussing A bulk degaussing system for the erasure of magnetic storage media by means of permanent magnets. The bulk degaussing system includes a rotatably mounted carousel and an angular displacement means that angularly displaces the carousel through a predetermined angle a... | 01/16/2007 |
| 7119691 | Electronic article surveillance marker deactivator using phase control deactivation A method and apparatus to deactivate an EAS security tag are described. ... | 10/10/2006 |
| 7120003 | Circuit arrangement with power factor correction, as well as a corresponding appliance The circuit arrangement has a mains connection, a mains switch with two switching contacts, a demagnetization coil and a switch-mode power supply, which contains a driver circuit for producing a control voltage for the switching transistor of the switch-mode power s... | 10/10/2006 |
| 7106536 | Write head demagnetizer A demagnetizer for an inductive load having a driver circuit including at least one transistor and a ramp-down voltage source switchably connected to the driver circuit, so that when the ramp-down voltage source is connected to the transistor, it drives the voltage ... | 09/12/2006 |
| 7088537 | Removing residual magnetization in a data transducer Method and apparatus for removing residual magnetization in a data transducer, such as a recording head used to write data to a recording medium in a data storage device. A residual magnetization sense circuit senses a residual magnetization of a pole of the data tr... | 08/08/2006 |
| 7079345 | Demagnetization of magnetic media for data storage device using gradually reduced magnetic field Demagnetizing magnetic media for recording data in a data storage device includes placing the magnetic media in a magnetic field at a first strength, and gradually reducing the magnetic field to a second strength to essentially eliminate net magnetization in the mag... | 07/18/2006 |
| 7073513 | Superconducting magnetic control system for manipulation of particulate matter and magnetic probes in medical and industrial applications A system and method of controlling movement of magnetic material with at least first and second high temperature superconductors at spaced locations. A plurality of solenoids are associated with the superconductors to induce a persistent currents in preselected high... | 07/11/2006 |
| 7064948 | Electrical properties and uniformity of bulk degaussing coils A degaussing system for magnetic media is provided, the system comprising an erasing head connected to an LC circuit and the erasing head including an elongated form around which a coil is wound. The coil has two segments which are spaced apart a distance to provide... | 06/20/2006 |
| 7061741 | Method for magnetic field reduction using the decoupling effects of multiple coil systems A method for reducing the magnetic field level in the vicinity of two or more connected reactors wherein each reactor is a magnetic dipole and wound so that currents flow in opposite directions and resulting in magnetic fluxes opposing each other. ... | 06/13/2006 |
| 7050255 | System and apparatus for assembly level disk erase A disk erase apparatus for erasing information on one or more disks in a disk drive uses a high strength magnetic field to erase the disks while the disks are in the HDD assembly. The design of the head disk enclosure provides a reduced thickness in a localized regi... | 05/23/2006 |
| 7016362 | System for and method of implementing wireless neighborhood area networks A communications system that receives information (e.g., TCP/IP-compatible audio, video, and data applications) from a high-speed wide-area network (e.g., an existing cable, DSL, or satellite network) and communicates at least a portion of the information to a wirel... | 03/21/2006 |
| 6965505 | Ship degaussing system and algorithm At a ship's magnetic silencing facility, calibration measurements are taken of onboard magnetic fields, and the off-board magnetic signature is minimized through an iterative degaussing process. Current data associated with the signature minimization is retained by ... | 11/15/2005 |
| 6946962 | Electronic article surveillance marker deactivator using inductive discharge A method and apparatus to deactivate an EAS security tag are described. ... | 09/20/2005 |
| 6760210 | Multi-functional system for demagnetizing ferromagnetic objects The present invention relates to demagnetizing objects in a fusion cake, objects used in vehicle construction, turbines, diesel engines and other equipment. A system of the present invention comprises four rectilinear working conductors in the shape of busbars which... | 07/06/2004 |
| 6747823 | Method of demagnetizing and transferring magnetization in a magnetic recording medium, and device thereof A method of controlling magnetic recording in a magnetic recording medium and a control device for the same provides a symmetrical transferred signal waveform of equal magnitude with good reproducibility and performs magnetic transfer with high reliability. In perfo... | 06/08/2004 |
| 6731491 | Bulk degausser with fixed arrays of magnet poles A bulk degaussing apparatus and method for erasing magnetic media of various sizes. A plurality of fixed magnetic poles are predisposed around a gap for projecting magnetic flux across the gap such that the spacing of the poles is provided at roughly equal intervals... | 05/04/2004 |
| 6729277 | Electromagnetic valve controller An electromagnetic valve controller estimates a dead time based on predetermined parameters. A dead time for the current cycle is determined based on the estimated dead time. The controller measures a dead time in the previous cycle. The controller determines a devi... | 05/04/2004 |
| 6650526 | Demagnetizing circuit For achieving a desired course in the demagnetizing circuit (I1) and power dissipation that is as low as possible during continuous operation of a color television set, a demagnetizing circuit for controlling the demagnetizing current (I1) includes two tr... | 11/18/2003 |
| 6594099 | Apparatus for erasing data stored on a magnetic disk A data eraser applies a strong magnetic field to a magnetic disk while suppressing the strength of a magnetic field applied to a spindle motor. The data eraser includes an upper magnet fixer, a lower magnet fixer, and a linkage. The upper magnet fixer fix... | 07/15/2003 |
| 6570727 | Method and apparatus for erasing information from a disk within a magnetic disk drive using an externally generated magnetic field The object of the present invention is to provide a method and apparatus configured to allow an externally generated magnetic field to simultaneously erase a portion of the information on a disk, or a plurality of disks, within a magnetic storage device. ... | 05/27/2003 |
