Exposure control system

Details Exposure control system Exposure control system

1975-08-13

1977-11-08

Adams, Russell E.

354 23D, 354 44, 354 60A, G03B 714

Patent

active

040578100

ABSTRACT:
An exposure control device incorporates an electromagnetic driving device comprising a stator with a plurality of pairs of diametrically opposed poles each mounted with a field coil, a rotor made of a permanent magnet for rotation in either direction through a predetermined angle when one or more than one pairs of poles are magnetized depending upon the brightness of a subject, and means for converting the rotation of the rotor into the force for driving a plurality of shutter blades, which also function as the diaphragm, to open to define a predetermined aperture for a predetermined time depending upon the brightness of the subject.

REFERENCES:
patent: 3812503 (1974-05-01), Engelsmann et al.
patent: 3813680 (1974-05-01), Wagensonner et al.
patent: 3882522 (1975-05-01), Erlichman
patent: 3900855 (1975-08-01), Stempeck
patent: 3903528 (1975-09-01), Kee
TTL Cookbook, by Don Lancaster, Howard Sams & Co., 1974, p. 196.

Affiliated with

Also associated with

Rating

Exposure control system 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 control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exposure control system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-231452