Patents by Inventor Melvin C. Crane

Melvin C. Crane 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).

  • Write and erase assembly for magneto-optic drive apparatus
    Patent number: 5490124
    Abstract: A write-erase magnet assembly for a data storage device including: a permanent magnet having a longitudinal axis and having a first longitudinally extending face portion with a first polarity and a second longitudinally extending face portion with a second polarity opposite the first polarity for alternately producing write and erase magnetic bias fields on an adjacently positioned data storage medium; a magnet support assembly for rotatably supporting the permanent magnet; a magnetic detent fixedly positioned relative to the longitudinal axis of the permanent magnet for magnetically producing a biasing torque on the magnet tending to orient the closer of the first and second face portions of the permanent magnet in adjacent relationship with the detent. A coil for applying flipping torque and braking torque for an eddy current rotation dampening assembly are also disclosed.
    Type: Grant
    Filed: August 2, 1994
    Date of Patent: February 6, 1996
    Assignee: Hewlett-Packard Company
    Inventors: Thomas C. Oliver, David P. Jones, Leslie G. Christie, Mark E. Wanger, Thomas E. Berg, Melvin C. Crane
  • Write and erase assembly for magneto-optic drive apparatus
    Patent number: 5345431
    Abstract: A write-erase magnet assembly for a data storage device including: a permanent magnet having a longitudinal axis and having a first longitudinally extending face portion with a first polarity and a second longitudinally extending face portion with a second polarity opposite the first polarity for alternately producing write and erase magnetic bias fields on an adjacently positioned data storage medium; a magnet support assembly for rotatably supporting the permanent magnet; a magnetic detent fixedly positioned relative to the longitudinal axis of the permanent magnet for magnetically producing a biasing torque on the magnet tending to orient the closer of the first and second face portions of the permanent magnet in adjacent relationship with the detent. A coil for applying flipping torque and braking torque for an eddy current rotation dampening assembly are also disclosed.
    Type: Grant
    Filed: September 14, 1992
    Date of Patent: September 6, 1994
    Assignee: Hewlett-Packard Company
    Inventors: Thomas C. Oliver, David P. Jones, Leslie G. Christie, Mark E. Wanger, Thomas E. Berg, Melvin C. Crane