Exposure adjusting device for a camera

Details Exposure adjusting device for a camera Exposure adjusting device for a camera

1998-03-31

2000-02-22

Perkey, W. B.

Photography

Camera detail

Diaphragm

G03B 904

Patent

active

060272619

ABSTRACT:
A high-performance exposure adjusting device for a camera has a magnet rotor united with an aperture member capable of steadily assuming three exposing positions according to the polarity of a direct current applied to a coil surrounding the rotor. When applying no current to the coil, the aperture member takes its magnetically neutral position to form a full aperture and is magnetically stabilized by a yoke surrounding the rotor. When the direct current of one polarity is applied to the coil, the aperture member rotates in one direction to form a first reduced aperture, and when the polarity of the current applied is reversed, a second reduced aperture is formed.

REFERENCES:
patent: 5262812 (1993-11-01), Fukasawa

Affiliated with

Also associated with

Rating

Exposure adjusting device for a 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 Exposure adjusting device for a camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exposure adjusting device for a camera will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-515485