Patents by Inventor Hermann Wehr

Hermann Wehr 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).

  • Method of selecting television display tubes in which the vacuum is too low
    Patent number: 5083957
    Abstract: So as to detect and remove tubes having too low a vacuum before gettering, a d.c. voltage which continuously increases from a low value to a maximum value is applied between the anode (g4) and a second electrode (g3) of a television display tube, the increase in this voltage being stopped as soon as a spark discharge current flows in the tube. The associated value of the d.c. voltage is evaluated as a criterion for the selection of the tubes.
    Type: Grant
    Filed: October 18, 1990
    Date of Patent: January 28, 1992
    Assignee: U.S. Philips Corporation
    Inventors: Andre Bolz, Hermann Wehr