Abstract: 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 may be provided to assist the passage of the magnetic media through the applied magnetic field. The conveyor may be a continuous motion conveyor belt including cleats for holding the magnetic media or a reciprocal media conveyor including magnetic storage media bin. The magnetic field generator may include permanent magnets of varying intrinsic coercivities and/or remanences.

Abstract: 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 may be provided to assist the passage of the magnetic media through the applied magnetic field. The conveyor may be a continuous motion conveyor belt including cleats for holding the magnetic media or a reciprocal media conveyor including magnetic storage media bin. The magnetic field generator may include permanent magnets of varying intrinsic coercivities and/or remanences.

Abstract: A system for degaussing magnetic media includes a media transport carousel mounted to move in a first direction into the system and through a magnetic field generator and to move in a second direction through the magnetic field generator and out of the system. An automatically reversible transmission transmits via a plurality of gears rotational force from an input shaft in a first rotational direction to drive the drive element and the media transport carousel in a first direction. The automatically reversible transmission is configured to transmit via a second plurality of gears the rotational force from the input shaft in the first direction to drive the drive element to move the media transport carousel in a second direction opposite of the first direction. A media rotation assembly automatically rotates the media transport carousel after it passes a distance through the magnetic field generator.

Abstract: 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 may be provided to assist the passage of the magnetic media through the applied magnetic field. The conveyor may be a continuous motion conveyor belt including cleats for holding the magnetic media or a reciprocal media conveyor including magnetic storage media bin. The magnetic field generator may include permanent magnets of varying intrinsic coercivities and/or remanences.

Abstract: 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 may be provided to assist the passage of the magnetic media through the applied magnetic field. The conveyor may be a continuous motion conveyor belt including cleats for holding the magnetic media or a reciprocal media conveyor including magnetic storage media bin. The magnetic field generator may include permanent magnets of varying intrinsic coercivities and/or remanences.

Abstract: 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 after passage of the carousel through a degaussing gap.

Abstract: 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 adjustment of the electrical and/or magnetic properties of the coil.

Abstract: 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 adjustment of the electrical and/or magnetic properties of the coil.

Abstract: A means for winding orthogonal coil systems that almost completely encompass and closely conform to magnetic media having a circular cylindrical form and orientation, including such media further encased in square or rectangular cassettes, cartridges or disk drives, while providing necessary access to that volume without the use of drawers and separable connectors or flexible lead wires for connection of the coils to energy stored in capacitors. The invention further employs hard wired circuitry for controlling the phase of currents in the coils and maintaining the desired rotation of the magnetic field. While this invention can be realized to degauss media inserted and extracted through the same side of the winding system, it is equally configurable to conveyance of media in one end of an orthogonal coil system and out of the opposing end.

Abstract: A bulk degaussing system automatically adjusts the operating voltage of the system to achieve a predetermined level of magnetic filed strength. A microprocessor is used to monitor the transient response of the system to maintain operation at a predetermined level of stored energy or to detect impending failure.