Controller for photographic enlarger or the like

Details Controller for photographic enlarger or the like Controller for photographic enlarger or the like

1979-04-27

1980-11-04

Hix, L. T.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 88, G03B 2773

Patent

active

042316545

ABSTRACT:
A controller for providing accurate analysis of color and density of the light from any color enlarger or the like. The controller is an on-easel analyzer having built-in automatic timer controls for controlling exposures from point 1 seconds to 99.9 seconds. Density and color filtration data provided by video or other off-easel analyzers are manually entered into digital switches on a control panel of the controller or such data can be automatically programmed in the controller through the use of punched paper tape or the like. The controller includes null indicator means to indicate a balance when the enlarger f/stop and color balance are adjusted. The controller may be programmed in units as small as 1 cc in color filtration ranges from 0 to 99 cc and density ranged from 0 to 199 cc. Controller also has a photo-sensitive probe, slope controls, a digital emulsion memory system and the controller can operate with substantially any color enlarger.

REFERENCES:
patent: Re28771 (1976-04-01), Aimi et al.
patent: 3724954 (1973-04-01), Dreyfoor, Jr.
patent: 3873199 (1975-03-01), Weinert
patent: 3873200 (1975-03-01), Crete et al.

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