Patents by Inventor Eugene Demick

Eugene Demick 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).

  • Photographic film projection dissolve system for arc lamp projectors
    Patent number: 4231643
    Abstract: A photographic film projection system includes a plurality of projectors, one of which is an arc lamp projector, and a dissolver instrument whose controlled output power to the arc lamp projector is a phase controlled average a.c. power. The arc lamp projector has a light valve comprising a motor means linearly responsive to average power, for example, a moving iron galvanometer, and a movable means, such as a louvre, positioned between the arc lamp and the film gate.
    Type: Grant
    Filed: March 30, 1979
    Date of Patent: November 4, 1980
    Assignee: Bergen Expo Systems, Inc.
    Inventors: Eugene Demick, Adrian J. Van Haasteren, Jr.
  • Photographic film projection dissolve system for arc lamp projectors
    Patent number: 4158491
    Abstract: A photographic film projection system includes a plurality of projectors, one of which is an arc lamp projector, and a dissolver instrument whose controlled output power to the arc lamp projector is a phase controlled average a.c. power. The arc lamp projector has a light valve comprising a motor means linearly responsive to average power, for example, a moving iron galvanometer, and a movable means, such as a louvre, positioned between the arc lamp and the film gate.
    Type: Grant
    Filed: December 14, 1977
    Date of Patent: June 19, 1979
    Assignee: Bergen Expo Systems, Inc.
    Inventors: Eugene Demick, Adrian J. Van Haasteren, Jr.