Patents by Inventor Anthony David Bowry

Anthony David Bowry 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 controlling slide projectors
    Patent number: 3958875
    Abstract: The invention uses frequency control of lamps and magazines in projectors and is especially adapted for programmed control by recording the frequency signals produced by previous rehearsal of the programme under manual control. The circuit uses an integrated voltage from the frequency signal to control threshold devices operating triggered switches controlling supply to the lamps, and to actuate a magazine control; a saw tooth signal being used as the basic timing signal in operating the lamps.
    Type: Grant
    Filed: May 31, 1974
    Date of Patent: May 25, 1976
    Assignee: Animatic Company Limited
    Inventors: Anthony David Bowry, Christopher Francis