Patents by Inventor Thomas W. Penird

Thomas W. Penird 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).

  • Getter assembly with stiffened getter wand and CRT
    Patent number: 5841228
    Abstract: A cathode ray tube (CRT) has a getter attachment wand with a trough-shape along a substantial portion of its length, imparting an increased stiffness to the wand to maintain the wand in close proximity to the inside surface of the CRT envelope, thereby avoiding clipping of the electron beam on its way to the screen. An optimal curvature of the wand strikes a balance between the desired stiffness and the ease with which the wand can be resistance welded to the top cup of the electron gun assembly.
    Type: Grant
    Filed: June 19, 1996
    Date of Patent: November 24, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Chin Y. Cha, Shridhar V. Iyer, Thomas W. Penird
  • Monochrome cathode ray tube electron gun with high voltage electrode lens
    Patent number: 4904898
    Abstract: A monochrome cathode ray tube incorporates an electron gun featuring a focusing electrode having an upper cup-shaped portion comprising a top cylindrical sidewall portion and a lower inwardly tapering sidewall portion connecting to a flat bottom portion, the cup-shaped portion supported by an elongated cylindrical base portion having a diameter of from about 44 to 48 percent of the diameter of the upper cylindrical portion of the cup. The electron gun is particularly suitable for use in monochrome cathode ray tubes for projection color television.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: February 27, 1990
    Assignee: North American Philips Corporation
    Inventors: Thomas W. Penird, Charles H. Rehkopf, Donald L. Say, Bruce W. Zellar