Patents by Inventor Helmut R. Roeder

Helmut R. Roeder 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).

  • Apparatus for preventing or alternatively restricting the discharge of anions and X-rays from the front side of cathode ray tubes
    Patent number: 4364095
    Abstract: On the rear wall of a cathode ray tube a metal disc system is arranged adjacent to the longitudinal axis of the tube, which metal disc system acts as an eddy current brake. The metal disc is substantially vertical to the rear wall, its diameter in a special embodiment is 60 mm and is arranged within a circle of about 500 mm diameter around the longitudinal axis of the tube parallel to the axis of the tube bulb. The metal disc preferably is of conductive metal, for instance aluminium or copper.
    Type: Grant
    Filed: December 9, 1980
    Date of Patent: December 14, 1982
    Inventor: Helmut R. Roeder