Patents Assigned to Control Data Corp.
  • Bubble memory bias field structure
    Patent number: 4692898
    Abstract: A bias magnet for a bubble memory device is comprised of a single material low permeability magnet contoured to enhance the magnetic field in the central area of the magnet and is adapted to be slightly larger than the bubble memory chip and in thermal contact therewith, the entire bubble memory chip and bias magnet structure to be surrounded by the rotating magnetic field drive coil structure.
    Type: Grant
    Filed: November 6, 1980
    Date of Patent: September 8, 1987
    Assignee: Control Data Corp.
    Inventors: Gale A. Jallen, Gene P. Bonnie