Film camera

Details Film camera Film camera

1973-11-12

1976-02-03

Hayes, Monroe H.

Optics: motion pictures

Shutters

Rotary

352152, 352207, G03B 910

Patent

active

039361683

ABSTRACT:
A cine camera having a rotary or reciprocating shutter driven by a motor is provided with a supplementary diaphragm which cooperates with the shutter during acceleration of the motor to its rated speed to reduce the effect on the first film frame or frames of the change in exposure time occurring during the acceleration period of the motor.

REFERENCES:
patent: 1700513 (1929-01-01), Porter
patent: 1800088 (1931-04-01), Debrie
patent: 1949455 (1934-03-01), Dina
patent: 2941445 (1960-06-01), Kuhnert
patent: 3135157 (1964-06-01), Thevenaz
patent: 3248166 (1966-04-01), Reinsch

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