1975-04-21
1977-03-22
O'Connor, Edna M.
354272, G03B 1912, G03B 902
Patent
active
040140342
ABSTRACT:
A single lens reflex camera in which the drive force for returning a diaphragm to its open aperture position upon termination of an exposure operation is isolated from the force causing the return of a reflecting mirror from its picture taking position to its viewing position. The camera has a diaphragm which is normally biased in a direction for being stopped-down to a pre-adjusted diaphragm aperture. A spring mechanism when coupled to the diaphragm biases it in its open position against its normal tendency. A diaphragm drive mechanism enables the diaphragm, however, to be stopped down from its open position to its pre-adjusted diaphragm aperture upon actuation of an exposure operation. Upon completion of the exposure operation, the diaphragm drive member is disengaged from the diaphragm thereby enabling the diaphragm to return to its open aperture position under the influence of the spring mechanism. The reflecting mirror is movable from its viewing position to its picture taking position in association with the operation of the diaphragm drive mechanism and subsequently returns to its picture taking position upon termination of the exposure operation.
REFERENCES:
patent: 3468232 (1969-09-01), Knapp
patent: 3731609 (1973-05-01), Kobayashi et al.
patent: 3854811 (1974-12-01), Araki
patent: 3887932 (1975-06-01), Uno et al.
patent: 3891992 (1975-06-01), Ueda et al.
Minolta Camera Kabushiki Kaisha
O'Connor Edna M.
LandOfFree
Single lens reflex camera does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Single lens reflex camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single lens reflex camera will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1959611