Patents Assigned to Bergen Expo Systems, Inc.
  • 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.