Harry R Duer

US Patent:

54755034, Dec 12, 1995

Filed:

Feb 8, 1994

Appl. No.:

8/193334

Inventors:

Paul Huang - San Jose CA
Harry R. Duer - Boulder Creek CA

Assignee:

Logitech, Inc. - Fremont CA

International Classification:

H04N 1024

US Classification:

358473

Abstract:

A rigid cylindrical roller for use in portable optical scanners. The roller includes a thinned midsection and a plurality of grooves. A plurality of compressible, surface gripping rings are fitted onto the plurality of grooves. Each surface gripping ring is held relatively immobile with respect to one another as well as to the roller. In one embodiment, the roller, the grooves, and the compressible rings are dimensioned such that in use, the surface-gripping rings are compressed inside the grooves at the points of rolling contact, permitting both the roller and the rings to come into contact with the scanned surface.

US Patent:

58015310, Sep 1, 1998

Filed:

Jan 18, 1996

Appl. No.:

8/544090

Inventors:

Elliot Viches - Sunnyvale CA
Mostafa Mahmoudian - San Carlos CA
Jagdeep S. Buttar - Union City CA
Oleg A. Gergel - Mountain View CA
Patrick A. Weber - Sunnyvale CA
Victor Rudman - Palo Alto CA
Harry Ray Duer - Boulder Creek CA

Assignee:

Read-Rite Corporation - Milpitas CA

International Classification:

G01R 3312
G11B 554
G11B 2114

US Classification:

324212

Abstract:

An apparatus for testing magnetic heads that interact with magnetic disks includes a translational slide and a rotatable arm mounted to one end of the slide. The translational slide moves the rotatable arm in a longitudinal direction parallel to the surface of a magnetic disk. The arm rotates the magnetic head to different positions relative to data tracks on the disk. A second translational slide moves the magnetic head vertically above the disk to adjust the vertical position of the head. The three movements of the head, (1)horizontally across the disk, (2)rotationally by the arm, and (3)vertically relative to the disk surface are controlled by servomechanisms. A read/write amplifier circuit is connected to the head under test. The test apparatus is controlled by a computer that interfaces with circuitry connected to the servomechanisms.

US Patent:

60993626, Aug 8, 2000

Filed:

May 13, 1998

Appl. No.:

9/078003

Inventors:

Elliot Viches - Sunnyvale CA
Mostafa Mahmoudian - San Carlos CA
Jagdeep S. Buttar - Union City CA
Oleg A. Gergel - Mountain View CA
Patrick A. Weber - Sunnyvale CA
Victor Rudman - Palo Alto CA
Harry Ray Duer - Boulder Creek CA

Assignee:

Read-Rite Corporation - Milpitas CA

International Classification:

H01R 448

US Classification:

439817

Abstract:

An apparatus for testing magnetic heads that interact with magnetic disks includes a translational slide and a rotatable arm mounted to one end of the slide. The translational slide moves the rotatable arm in a longitudinal direction parallel to the surface of a magnetic disk. The arm rotates the magnetic head to different positions relative to data tracks on the disk. A second translational slide moves the magnetic head vertically above the disk to adjust the vertical position of the head. The three movements of the head, (1)horizontally across the disk, (2)rotationally by the arm, and (3)vertically relative to the disk surface are controlled by servomechanisms. A read/write amplifier circuit is connected to the head under test. The test apparatus is controlled by a computer that interfaces with circuitry connected to the servomechanisms.

US Patent:

47717858, Sep 20, 1988

Filed:

Jul 25, 1986

Appl. No.:

6/890602

Inventors:

Harry R. Duer - Boulder Creek CA

Assignee:

Resonex, Inc. - Sunnyvale CA

International Classification:

A47B 916

US Classification:

128653

Abstract:

Magnetic resonance imaging apparatus having a structure with an opening adapted to receive an object to be imaged. An object platform is provided which is sized so that it can be moved into the opening in the magnet structure. Structure is provided for supporting the platform and for moving the platform along x, y and z axes.