Patents by Inventor Gerhard A. Wolfert

Gerhard A. Wolfert 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).

  • Electromagnetic print hammer coil assembly
    Patent number: 4397234
    Abstract: A heat exchange system for an electromagnetically operated print hammer of a print hammer bank provides internal and external heat transfer for the operating windings. A non-magnetic metal bobbin of the heat exchange system provides conductive transfer of heat from the interior of the operating winding to the magnetic core. Flat parallel plates of magnetic material are attached to the sides of the operating winding for external heat transfer and magnetic flux shielding. The plates may have multiple laminations having different saturation and permeability characteristics.
    Type: Grant
    Filed: December 30, 1981
    Date of Patent: August 9, 1983
    Assignee: International Business Machines Corporation
    Inventors: Ho C. Lee, David H. Rickenbach, Gerhard A. Wolfert, Jack L. Zable