Patent
1985-12-12
1987-04-21
Mathews, A. A.
354155, G03B 912, G03B 1302
Patent
active
046592024
ABSTRACT:
A reflex camera has a mirror mounted at a fixed angle for receiving image rays from a lens and reflecting the rays onto a focusing screen, the mirror and focusing screen being mounted on a slide plate moveable out of the path between the lens and the shutter of the camera. The slide plate is supported by linear bearings for movement along guide rods in a linear path. A motor may be actuated to rotate a cam which drives a pulley wheel during a portion of the cycle of the cam, and which releases the pulley wheel during the remainder of the cycle. The pulley wheel is operatively connected to the slide plate and when the pulley wheel is driven by the cam the slide plate is pulled against the opposition of springs into the focusing position of the camera. When the pulley wheel is released by the cam the springs rapidly propel the slide plate to the picture taking position. The cam and the pulley wheel are mounted for rotation about axes offset from one another and the cam engages a follower on the pulley wheel during part of the cycle and releases the follower during the remainder of the cycle. The cam also controls a switch which energizes and deenergizes the motor.
REFERENCES:
patent: 3008397 (1961-11-01), Winkler
patent: 3785270 (1974-01-01), Schiff et al.
patent: 3911454 (1975-10-01), Ohmori
Fox Anthony G.
Sadre-Marandi Ehsan
Beattie Systems, Inc.
Mathews A. A.
Ruderman Alan
LandOfFree
Mirror mounting and drive system for SLR cameras does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mirror mounting and drive system for SLR cameras, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mirror mounting and drive system for SLR cameras will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-748062