Patents by Inventor Holger J. Baasch

Holger J. Baasch has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5530606
    Abstract: A load beam for a direct access storage device is disclosed as having an integral flexure formed of two generally uniform cross section intersecting beams with one of the beams extending between two projecting arms of the load beam. The flexure is spaced from an attached slider by a frustroconical projection formed on the flexure. The pitch and roll of the slider is limited by forming surfaces on the load beam structure that will engage the slider as the slider either pitches or rolls excessively. Overlying the flexure and the slider and adhesively engaged with the flexure is a damping layer of visco-elastic material which will absorb energy and suppress undesirable vibrations. The damping layer is provided with tabs or extensions that are adhered to the projecting arms of the load beam to enhance the vibration damping function of the layer.
    Type: Grant
    Filed: December 14, 1994
    Date of Patent: June 25, 1996
    Assignee: International Business Machines Corporation
    Inventors: Holger J. Baasch, William W. Brooks, Jr., Jerome T. Coffey, David L. Roach
  • Patent number: 5495375
    Abstract: The improved disk drive system has an improved actuator arm assembly where the arms are independently and individually insertable and removable from the actuator member. Furthermore, each arm is individually self-locked into the actuator member without the need for external retaining means such as screws, springs, and rings. Since the arms are individually insertable/removable, the arms can be made very thin thereby allowing easy attachment of the head suspension assembly to the arm without the need for swaging, bonding, welding or screw-in. Since the arms can be made very thin, that provides substantial reduction in disk to disk spacing and therefore, substantial reduction in the overall height of a disk drive system.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: February 27, 1996
    Assignee: International Business Machines Corporation
    Inventors: Holger J. Baasch, Lowell J. Berg, Alexander Gredinberg, Peter M. Herman, Jerry L. Neubauer, John R. Reidenbach, Oscar J. Ruiz, Victor W. C. Shum
  • Patent number: 4813033
    Abstract: A two axis electromagnetic actuator is designed for moving an optical element in an optical or magneto-optical recorder. The actuator has balanced, crossed, electro-magnetic coil structures supported by two sets of leaf springs and positioned in dual air gaps for motion in a direction which is the vector sum of the movement in two orthogonal directions. In the actuator the motive forces and the masses of the moving elements are centered on the axis of major motion. Also leaf springs, that allow the major motion, have their forces balanced about the axis of major motion.
    Type: Grant
    Filed: October 30, 1985
    Date of Patent: March 14, 1989
    Assignee: International Business Machines Corporation
    Inventors: Holger J. Baasch, Francis S. Luecke
  • Patent number: 4595261
    Abstract: A phase retardation element, for use in an optical data storage system, which provides a 90.degree. phase difference between two perpendicular polarized components of an incident wave with a single internal reflection from a surface coated with a thin film of dielectric or metal material.
    Type: Grant
    Filed: October 13, 1983
    Date of Patent: June 17, 1986
    Assignee: International Business Machines Corporation
    Inventors: Holger J. Baasch, Douglas S. Goodman, Francis S. Luecke, Ronald L. Soderstrom, Eberhard A. Spiller
  • Patent number: 4456938
    Abstract: During manufacture of a flexible disk drive, the drive's head is located in its penetration, radial, azimuth, tangential, roll and pitch attitudes by reading a test disk, as the head is held by a robotic head holder/manipulator. The head's signal produces closed-loop control of a serially-stacked array of rotary and linear motors which position the holder/manipulator. After the head is properly adjusted, it is fixed to the disk drive's head carriage.
    Type: Grant
    Filed: October 12, 1982
    Date of Patent: June 26, 1984
    Assignee: International Business Machines Corporation
    Inventors: Holger J. Baasch, Ross W. Bishop, Paul M. Charlson, James G. Hunzeker, Clarence R. Schwieters
  • Patent number: 4276574
    Abstract: A magnetic head assembly for reading and/or writing a track of magnetic information on a moving magnetic medium and for erasing edge portions of the track. The head assembly comprises a central data transfer magnetic core including a pair of core portions providing a data transfer gap on an active face of the head assembly with a read/write coil on one of the core portions. The head assembly comprises also an erase core which includes a pair of erase core portions extending along and in contact with one of the write core portions, another pair of erase core portions respectively in alignment with the first named erase core portions and providing therewith erase gaps on the active face of the head assembly that extend transversely of the direction of movement of the magnetic medium on the active face and a core portion on which an erase coil is disposed bridging and between the last two mentioned erase core portions.
    Type: Grant
    Filed: December 6, 1979
    Date of Patent: June 30, 1981
    Assignee: International Business Machines Corporation
    Inventors: Holger J. Baasch, Francis S. Luecke