Memory controlled motion picture apparatus

US4378148A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Norbert Burgermann · Munich, DE
• Alois Rieder · Munich, DE
• Horst Rossbach · Eichenau, DE

Key dates

• Filing date: Aug 19, 1981
• Grant date: Mar 29, 1983
• Expiry date: Aug 19, 2001

Classification

• Technology area (CPC G): Physics
• CPC primary: G03B21/44
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A motion picture apparatus and preferably a motion picture projector. A rotary disc shutter is actuated by an electric drive and comprises a shutter sector. A claw mechanism controlled by the electric drive provides for transport of a film and the motion of the film is controlled by a solenoid having associated a solenoid plunger suitable for disengaging the claw transport mechanism after a frame transport phase. A position pulse generator provides a shutter position pulse depending on the position of the shutter sector. An output memory element connected to the electromagnet solenoid controls the energization of the electromagnet and in turn is connected to a switch and to the position pulse generator. Preferably additional memories are provided for performing functions such as controlling the advance and the reverse motion or providing for a timer or individual frame operation.