Method of driving a motor-driven shutter for a camera

Details Method of driving a motor-driven shutter for a camera Method of driving a motor-driven shutter for a camera

1989-06-22

1990-06-12

Gellner, Michael L.

G03B 708

Patent

active

049336959

ABSTRACT:
A method of driving a motor-driven shutter for a camera having a sector opening lever which is pivotal to open and close sectors, a sector opening cam movably supported and engageable with an engagement pin provided on the sector opening lever, an actuating member for pivoting the sector opening lever through engagement between the sector opening cam and the engagement pin, and a reversible motor for driving the actuating member. The motor is temporarily suspended when the actuating member is driven to a position where the sector opening cam comes into contact with the engagement pin, and the motor is restarted to cause the engagement pin to reach a predetermined position on the sector opening cam. Thus, it is possible to obtain a stable shutter opening operation and hence increase the degree of aperture accuracy.

REFERENCES:
patent: 4779114 (1988-10-01), Kobayashi
patent: 4868596 (1989-09-01), Ishida et al.

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