by mechanical connections, e.g. by cam, by linkage

Introduced: September 1968

Last revised: January 2006

Full Title

Photographic printing apparatus > Projection printing apparatus, e.g. enlarger, copying camera > Means for automatic focusing therefor > by mechanical connections, e.g. by cam, by linkage

Classification Context

Section:: PHYSICS
Class:: PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
Subclass:: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR

2 direct subcodes

Child Classifications

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G03B 27/38 embodying screws with non-uniform pitch
G03B 27/4 adapted for use with lenses of different focal length