Carriers operable to move pictures into, and out of, the projection or viewing position and carrying one or two pictures only in a removable manner

Full Title

Devices for changing pictures in viewing apparatus or projectors > Carriers operable to move pictures into, and out of, the projection or viewing position and carrying one or two pictures only in a removable manner

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