Patents by Inventor James P. Chase

James P. Chase 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: 4345367
    Abstract: The transducer has a pole tip plate containing magnetic pole tips defining transducing gaps and a core housing providing electric shielding and containing magnetic cores engaging the poles. The tip plate has a first part of a wear-resistant, nonmagnetic, machinable material in the transducer-to-medium interface area, providing long wear, and an integrally joined contiguous second part of a conductive, nonmagnetic, machinable material, providing electric shielding.In accordance with the method, corresponding surfaces of a first block portion made of nonmagnetic, wear-resistant, machinable material and of a second block portion made of a nonmagnetic, conductive, machinable material are integrally joined together. Pole tips are secured into parallel grooves machined transversely to the joined surfaces to form a half-tip plate.
    Type: Grant
    Filed: March 26, 1981
    Date of Patent: August 24, 1982
    Assignee: Ampex Corporation
    Inventor: James P. Chase
  • Patent number: 4291354
    Abstract: The transducer has a pole tip plate containing magnetic pole tips defining transducing gaps and a core housing providing electric shielding and containing magnetic cores engaging the poles. The tip plate has a first part of a wear-resistant, nonmagnetic, machinable material in the transducer-to-medium interface area, providing long wear, and an integrally joined contiguous second part of a conductive, nonmagnetic, machinable material, providing electric shielding.In accordance with the method, corresponding surfaces of a first block portion made of nonmagnetic, wear-resistant, machinable material and of a second block portion made of a nonmagnetic, conductive, machinable material are integrally joined together. Pole tips are secured into parallel grooves machined transversely to the joined surfaces to form a half-tip plate.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: September 22, 1981
    Assignee: Ampex Corporation
    Inventor: James P. Chase