Patents by Inventor Willem Van der Hoeck

Willem Van der Hoeck 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).

  • Electron tube with electrode centering arrangement
    Patent number: 5150002
    Abstract: In an electron tube having a glass envelope portion (1) is an electrode system (3) which is slid in the envelope portion (1) and is centered with respect to the wall (7) of the envelope portion (1) by means of a number of pretensioned springs (6). The springs (6) each extend from a supporting point B, which is fixed with respect to the electrode system (3), over their effective spring length toward the wall (7) of the envelope portion (1) and press against the wall (7) at a contact point A. A stick-slip movement of the springs over the surface of the wall (7) during the sliding movement of the electrode system (3) is avoided because the springs (6) each extend over their effective spring length along a straight line between supporting point B and contact point A. Flowing of the springs and the resulting occurrence of glass damage to the wall (7) is minimized by this spring configuration.
    Type: Grant
    Filed: January 30, 1989
    Date of Patent: September 22, 1992
    Assignee: U.S. Philips Corporation
    Inventors: Willem Van der Hoeck, Piet C. J. Van Rens, Johannes A. Rebergen