Patents by Inventor David B. Jepsen

David B. Jepsen 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).

  • Magnetic disk memory power supply
    Patent number: 4524399
    Abstract: In a magnetic disk memory, a magnetic disk is driven by a DC motor having a permanent magnet rotor and a pair of stator windings sharing a common ground connection point. The windings are alternately energized from an electrical power source by a switching circuit which produces positive voltage pulses of predetermined duration across the windings. The negative emf induced in the windings between energizing pulses provides a source of regulated, negative DC voltage which may be used to power various components requiring such a supply.
    Type: Grant
    Filed: June 2, 1982
    Date of Patent: June 18, 1985
    Assignee: Tandon Corporation
    Inventor: David B. Jepsen