Patents by Inventor Adrianus C. Tops

Adrianus C. Tops 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: 4158867
    Abstract: A video disc player is provided with a stabilizing disc which during playing is disposed at a small distance above the video disc, air being admissible through an inlet restriction between the stabilizing disc and the video disc so that locally a sub-atmospheric pressure is produced as a result of the centrifugal pumping action of the video disc. In order to prevent the video disc from being drawn along when the stabilizing disc is moved upwards, an air by-pass passage is provided which via air-valve means can be opened when playing of the video disc is terminated, so as to admit an increased air stream between the stabilizing disc and the rotating video disc in order to at least substantially eliminate the prevailing sub-atmospheric pressure.
    Type: Grant
    Filed: May 15, 1978
    Date of Patent: June 19, 1979
    Assignee: U.S. Philips Corporation
    Inventors: Adrianus C. Tops, Johannes A. Iemenschot