Diaphragm adjusting arrangement in a photographic enlarging or c

Details Diaphragm adjusting arrangement in a photographic enlarging or c Diaphragm adjusting arrangement in a photographic enlarging or c

1989-06-29

1990-10-02

Hix, L. T.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 55, 350254, G03B 2752, G02B 716

Patent

active

049610872

ABSTRACT:
A diaphragm adjusting arrangement in an enlarging appartus having several lenses with an adjustable diaphragm includes a motor drive for the common adjustment of the diaphragms of all lenses and a device for detecting the adjusting path. By means of the comparison of the actual position of the diaphragms with a given desired position in a control circuit, a control signal is generated for the motor drive to move the diaphragms into the given position.

REFERENCES:
patent: 2871776 (1959-02-01), Calamai
patent: 4307940 (1981-12-01), Hagedorn-Olsen

Affiliated with

Also associated with

Rating

Diaphragm adjusting arrangement in a photographic enlarging or c does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Diaphragm adjusting arrangement in a photographic enlarging or c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diaphragm adjusting arrangement in a photographic enlarging or c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-294845