Patent
1976-12-21
1978-03-14
Gonzales, John
354274, G03B 902
Patent
active
040794016
ABSTRACT:
An iris diaphragm of a reflex camera, spring-biased into a wide-open position, is settable to a preselectable stop position via a linkage including a cam follower on a swing ring oscillatable about an off-axial fulcrum. The cam follower coacts with a cam disk which is manually rotated against the force of a restoring spring during a windup operation and, upon subsequent release, displaces the cam follower and the swing ring which entrains the setting ring of the diaphragm through a yieldable coupling to the selected stop position and restores it to the wide-open position in the course of a revolution. During windup, a beveled flank on the high dwell of the cam disk oscillates the swing ring and entrains the setting ring for another brief but ineffectual reduction in the diaphragm aperture.
REFERENCES:
patent: 3715965 (1973-02-01), Alfredsson
Baab Albert
Himmelsbach Paul
Gonzales John
Jos. Schneider & Co. Optische Werke Kreuznach
Ross Karl F.
LandOfFree
Diaphragm preselector for camera objective does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Diaphragm preselector for camera objective, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diaphragm preselector for camera objective will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2233282