Patents by Inventor Frank D. Marschka

Frank D. Marschka 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: 4414485
    Abstract: The present invention is an improvement in an electron gun for use in a cathode-ray tube. Such a gun includes a cathode assembly and at least two spaced successive electrodes having aligned electron beam apertures therein. The improvement comprises one of the two electrodes having a plurality of alignment apertures disposed around the periphery thereof. A plurality of insulative support assemblies are referenced to the plurality of alignment apertures and interconnected to the one electrode. Each of the support assemblies also includes at least one support plate having a locating portion which is attached to the other electrode. A method is disclosed for aligning the electron beam apertures of the two successive electrodes.
    Type: Grant
    Filed: June 23, 1981
    Date of Patent: November 8, 1983
    Assignee: RCA Corporation
    Inventor: Frank D. Marschka
  • Patent number: 4350925
    Abstract: An electron gun includes an electron beam source and at least two spaced apart successive electrodes. The successive electrodes are individually attached to, spaced from, and disposed concentric with and substantially within a ceramic cylinder. A resistive coating is uniformly disposed on at least an interior wall surface of the ceramic cylinder.
    Type: Grant
    Filed: July 9, 1980
    Date of Patent: September 21, 1982
    Assignee: RCA Corporation
    Inventor: Frank D. Marschka
  • Patent number: 4344015
    Abstract: A cathode ray tube comprises an envelope having a funnel portion with an electrical terminal extending through a wall surface thereof. A faceplate is sealed to the funnel portion and a screen contact assembly provides electrical contact between the electrical terminal and an aluminum coating on an inside surface of the faceplate. The screen contact assembly includes a conductive strip attached at one end to the electrical terminal. At the other end of the strip and attached thereto is a relatively flexible first contact member which is in pressured electrical contact with the aluminum layer on the faceplate. Disposed between the flexible first contact member and the aluminum layer on the faceplate is an oxidized, silver plated NICHROME foil member of high electrical conductivity. Transverse support and lateral stability is provided by a relatively flexible second contact member attached to and forming a part of the screen contact assembly.
    Type: Grant
    Filed: August 18, 1980
    Date of Patent: August 10, 1982
    Assignee: RCA Corporation
    Inventor: Frank D. Marschka