Robert V Schultz

US Patent:

6714398, Mar 30, 2004

Filed:

Jun 7, 2002

Appl. No.:

10/165724

Inventors:

Robert A. Schultz - Lincoln NE

Assignee:

Data Security, Inc. - Lincoln NE

International Classification:

H02H 100

US Classification:

361134, 361121, 361151, 361155, 361187, 360118, 360121, 360125

Abstract:

A bulk degaussing apparatus and method for erasing magnetic media of various sizes. A media passage track is provided such that media passing therethrough is uniformly exposed to the magnetic fields provided through the gap. The bulk degaussing apparatus has fixed magnetic pole pairs predisposed for generating uniform magnetic field elements across a gap projecting magnetic flux across the gap for erasing various sizes of magnetic media, with the magnetic media receiving track positioned relative to the poles such that adjacent like poles are arranged on each side of the gap to counteract fringing effects. The bulk degaussing method for erasing various sizes of magnetic media provides a plurality of fixed magnetic pole pairs for generating uniform magnetic field elements on one or more sides of a degaussing region projecting magnetic flux into the region, and arranges the plurality of fixed poles so that adjacent poles counteract fringing effects. The described embodiments provide for generation of single uniform fields, and to non-interacting systems of such fields, through the application of arrays of magnetic poles having simple geometry. Specifically, the arrays address problems of magnetic field uniformity arising from prior art application of extruded magnet shapes.

US Patent:

6731491, May 4, 2004

Filed:

Jun 15, 2001

Appl. No.:

09/882015

Inventors:

Robert A. Schultz - Lincoln NE

Assignee:

Data Security, Inc. - Lincoln NE

International Classification:

H01H 4700

US Classification:

361149, 361143

Abstract:

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 or sets of intervals across the gap to form sets of magnetic fields at the staggered intervals. A media passage is provided such that across the width of the passage at every point, media passing therethrough is linearly exposed to the magnetic fields provided through the gap. An adapter constrains location of the media passing through the gap by way of the media passage such that the plurality of magnetic poles effectively degausses regions formed between the poles. Placement of the magnetic poles is provided with partial overlap of facing poles on opposite sides of the pathway of the media passage. Two or more multi-pole degaussing regions provided with differing orientation avoid regional weaknesses or singularities in the magnetic field.

US Patent:

7064948, Jun 20, 2006

Filed:

Mar 21, 2003

Appl. No.:

10/394539

Inventors:

Robert A. Schultz - Lincoln NE, US
LeRoy D. Thiel - Lincoln NE, US

Assignee:

Data Security, Inc. - Lincoln NE

International Classification:

H01H 47/00

US Classification:

361149, 361143

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.

US Patent:

7164569, Jan 16, 2007

Filed:

Jun 30, 2004

Appl. No.:

10/881634

Inventors:

LeRoy D. Thiel - Lincoln NE, US
Robert A. Schultz - Lincoln NE, US

Assignee:

Data Security, Inc. - Lincoln NE

International Classification:

H01F 13/00
H01H 47/00

US Classification:

361149, 361143, 361150, 361151, 361267

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.

US Patent:

7593210, Sep 22, 2009

Filed:

Feb 1, 2008

Appl. No.:

12/024820

Inventors:

Robert A. Schultz - Lincoln NE, US

Assignee:

Data Security, Inc. - Lincoln NE

International Classification:

H01F 13/00
H01H 47/00

US Classification:

361149, 361143, 361147, 361150

Abstract:

One or more pairs of magnet assemblages ( and ) are provided with magnetized segments (-) arranged in a Halbach-like array. The magnet assemblages ( and ) define a gap () through which magnetic data storage media () pass in a direction () across the segments (-). The magnetized sides () of the magnet assemblages ( and ) face each other thereby creating strong magnetic fields which degauss the magnetic data storage media () passing through the gap ().

US Patent:

7701656, Apr 20, 2010

Filed:

Jul 14, 2006

Appl. No.:

11/457675

Inventors:

Robert A. Schultz - Lincoln NE, US
Leroy D. Thiel - Lincoln NE, US

Assignee:

Data Security, Inc. - Lincoln NE

International Classification:

G11B 5/03

US Classification:

360 66, 360 60, 361149, 361152

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.

US Patent:

7715166, May 11, 2010

Filed:

Jul 14, 2006

Appl. No.:

11/457687

Inventors:

Robert A. Schultz - Lincoln NE, US
Leroy D. Thiel - Lincoln NE, US

Assignee:

Data Security, Inc. - Lincoln NE

International Classification:

H01H 47/00

US Classification:

361149

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.

US Patent:

8345402, Jan 1, 2013

Filed:

Feb 18, 2010

Appl. No.:

12/707951

Inventors:

Robert A. Schultz - Lincoln NE, US

Assignee:

Data Security, Inc. - Lincoln NE

International Classification:

H01H 47/00
H01F 13/00

US Classification:

361143, 361149, 361150, 361151

Abstract:

Generation of an intense magnetic field to erase high coercivity magnetic media uses delivery of energy to a degaussing cavity. To conserve energy storage and delivery requirements and to obtain a desired magnetic strength generally uniformly within the cavity, strategic placement of supplemental turns at ends of the magnetic field generating coil wound around the cavity can promote uniformity. Construction of at least cavity ends from an adequate quantity of magnetically soft ferrous material can also promote uniformity. A combination of both approaches is possible.