1976-03-08
1977-03-15
Gonzales, John
354202, G03B 100
Patent
active
040127540
ABSTRACT:
A photographic camera having a lens opening and a finder opening in the housing or casing of the camera, is provided with a cover plate or blind plate to close these openings when pictures are not being taken, to protect the picture taking lens and the finder lens from possible damage and to prevent entrance of dust or foreign matter into the housing. A manually operable slider controls the movement of the cover plate between its closed and open positions and also moves the film transport means or feeding mechanism, to advance the film through the space of one picture area or "frame." As the amount of film wound on the take-up spool increases so that the diameter of such film increases, a less amount of rotation of the take-up spool is needed in order to advance the film through the space of one picture, and therefore a less amount of movement of the operating slider is needed, and this lesser movement might not be sufficient to shift the cover plate all the way from its closed position to its open position, if the cover plate were directly coupled to the slider. Therefore, the cover plate is coupled to the slider by a lost motion connection, and after the slider has caused some initial movement of the cover plate, an auxiliary drive moves the cover plate the remainder of the distance to its fully open position even though movement of the slider may have stopped.
REFERENCES:
patent: 3153375 (1964-10-01), Zapp
patent: 3611896 (1971-10-01), Aoki
patent: 3836985 (1974-09-01), Lange
Gonzales John
Rollei-Werke Franke & Heidecke
LandOfFree
Photographic 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 Photographic camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photographic camera will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-429052