Shutter for a single lens reflex camera

Details Shutter for a single lens reflex camera Shutter for a single lens reflex camera

1990-06-18

1991-07-02

Brown, Brian W.

354259, G03B 910

Patent

active

050289462

ABSTRACT:
A shutter for a single lens reflex camera, comprises a drive gear rotatable in opposite directions by a motor and having a non-tooth portion, a control gear directly or indirectly engageable with the drive gear, shutter blades driven by the control gear to open and close a shutter opening, and a spring for constantly biasing the control gear in a direction to close the shutter opening. Upon rotation of the drive gear, the control gear is rotated to face the non-tooth portion of the drive gear whereby the shutter blades are moved under the action of the spring to close the shutter opening. When the control gear is brought into meshing engagement with the drive gear, the shutter blades are rendered operative to open and close the shutter opening.

REFERENCES:
patent: 4193678 (1980-03-01), In Son
patent: 4893142 (1990-01-01), Ishida et al.

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