Patents Assigned to Vireco, A.G.
  • Mirror mechanism for a film projector
    Patent number: 4148568
    Abstract: A mirror mechanism for a continuous-motion cinematograph film projector. A drive shaft is mechanically coupled to the film transport and is coupled through a slipping clutch to drive a cam. A cam follower riding on the cam profile oscillates a compensating mirror. Frame synchronization of the mirror scan is effected by detection of optical synchronizing marks on the film. Release pulses are generated in response to the synchronizing marks to energize a solenoid to release a blocking member which otherwise blocks movement of the cam.
    Type: Grant
    Filed: November 18, 1977
    Date of Patent: April 10, 1979
    Assignee: Vireco, A.G.
    Inventor: Gordon McNally