Patents Represented by Attorney Ralph E. Clark, Jr.
  • Patent number: 4132459
    Abstract: This disclosure depicts a novel method for use in the manufacture of a color television picture tube having a narrow neck wherein the neck has a front end joined with a flared portion of the tube and a rear end having an axially extending tubulator. The tube also has an electron gun having at least one cathode adjacent the rear end of the neck, said cathode having an electron emissive coating, a forward element adjacent the front end of the neck, and a plurality of electrodes interspaced between the cathode and the forward element. The electrodes and forward element each have at least one aperture wherein the apertures are coaxial. The apertures define a beam passageway for passing through the gun a stream of electrons emitted by the cathode during operation of the tube. The beam passageway unavoidably forms a gas conduit during evacuation of the tube.
    Type: Grant
    Filed: March 28, 1977
    Date of Patent: January 2, 1979
    Assignee: Zenith Radio Corporation
    Inventor: Martin L. Lerner