Patents by Inventor Kenneth L. Fritsch

Kenneth L. Fritsch 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: 4934975
    Abstract: A method of making a CRT mask support structure with a faceplate mounted metal alloy rail filled with solder glass, including the step of coating the interior of the rail with a surfactant prior to filling to promote wetting of the rail by the solder paste.
    Type: Grant
    Filed: July 18, 1989
    Date of Patent: June 19, 1990
    Assignee: Zenith Electronics Corporation
    Inventors: Kenneth L. Fritsch, Raymond G. Capek
  • Patent number: 4463075
    Abstract: An improved process for providing positive electrical connection between the shadow mask, the conductive coating and the aluminum film by way of the mask-supporting studs is disclosed. The process is for use in the manufacture of a cathode ray tube having a face panel including a rearwardly extending skirt with a seal land for attachment to a funnel having a mating seal land. The face panel and skirt receive an internal coat of electrically conductive dag. The face panel has an inner surface for receiving a pattern of discrete phosphor deposits overlaid with an electrically conductive aluminum film. The tube includes a shadow mask for color selection receiving a high voltage, and held dependent adjacent to the face panel by a plurality of metal studs extending inwardly from the skirt.
    Type: Grant
    Filed: July 12, 1982
    Date of Patent: July 31, 1984
    Assignee: Zenith Electronics Corporation
    Inventors: Kenneth L. Fritsch, William A. Jordan, Hugo A. Lopez
  • Patent number: 4035524
    Abstract: This disclosure depicts a process for forming on an inner viewing surface of a color cathode ray tube having a flangeless faceplate a coating of an aqueous slurry composed of a photosensitized organic binder and a suspension of phosphor particles. The process comprises applying an aqueous pre-wet to the inner surface of the faceplate and, while the surface is still wet, applying a phosphor slurry to the pre-wetted inner surface of the faceplate; and suffusing the slurry across the surface to form a coating thereof. As a result of the pre-wetting of the faceplate surface, the occurrence of radially oriented non-coated areas on the surface is eliminated and the phosphor sedimentation rate is enhanced.
    Type: Grant
    Filed: April 1, 1976
    Date of Patent: July 12, 1977
    Assignee: Zenith Radio Corporation
    Inventor: Kenneth L. Fritsch