Drive and stopping method and device for a cinematographic camer

Details Drive and stopping method and device for a cinematographic camer Drive and stopping method and device for a cinematographic camer

1973-09-07

1976-07-06

Hayes, Monroe H.

Optics: motion pictures

Camera and/or projector drive mechanisms

With starting and/or stopping means

G03B 100

Patent

active

039678890

ABSTRACT:
A cinematographic apparatus having an electric motor coupled to a drive shutter, first means coupled to the shutter for sensing a predetermined position thereof, second means coupled to the motor for locking said motor and the shutter in a predetermined position, and a control circuit for providing driving power to the motor, and third means for removing forward driving power, and control means including a trigger switch for unlocking said second means before actuating the control circuit to provide forward driving power to the motor; said control circuit is adapted to continue to supply forward driving power to the motor after release of the trigger switch, said third means removing forward driving power in response to release of said trigger switch and detection by said first means of said predetermined motor position, and said control means adapted to control said second means to lock said drive motor in a predetermined position after removal of the driving power by said third means.

REFERENCES:
patent: 3512881 (1970-05-01), Kubota
patent: 3565521 (1971-02-01), Butler
patent: 3690752 (1972-09-01), Derossi
patent: 3692394 (1972-09-01), Bauer
patent: 3809466 (1974-05-01), Kobayashi
patent: 3810692 (1974-05-01), Drasch
patent: 3819258 (1974-06-01), Butler

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