Device for protecting the photographic optical system of camera

Details Device for protecting the photographic optical system of camera Device for protecting the photographic optical system of camera

1987-05-26

1988-03-01

Perkey, W. B.

3541951, 354202, G03B 300, G03B 1702, G03B 1704

Patent

active

047289775

ABSTRACT:
This patent application discloses a device for protecting the photographic optical system of a camera having a first detector for detecting that the back cover of the camera is open or closed and a second detector for detecting whether or not the film is winding on the takeup spool, wherein when that the back cover is open or that the film is not winding on the spool is detected by the first and second detectors, either the rear of the photographic optical system is shut off, or the photographic optical system is moved forward, so that the rear vertex of the photographic optical system is prevented from being touched with a finger or the edge of the film leader.

REFERENCES:
patent: 577891 (1897-03-01), Turner
patent: 3611896 (1971-10-01), Aoki
patent: 3938170 (1976-02-01), Winkler et al.
patent: 4303328 (1981-12-01), Persson et al.
patent: 4365884 (1982-12-01), Knapp
patent: 4597657 (1986-07-01), Wakaboyashi

Affiliated with

Also associated with

Rating

Device for protecting the photographic optical system of 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 Device for protecting the photographic optical system of camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for protecting the photographic optical system of camera will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1001439