Image projection system

Details Image projection system Image projection system

1987-08-10

1988-07-12

Haroian, Harry N.

Optics: image projectors

Slide transfer mechanism

Feeder magazine and receiver magazine

353DIG5, 353103, G03B 2302

Patent

active

047566167

ABSTRACT:
An image projection system having a built-in mechanism for changing unframed transparencies comprises a frame, a source of illumination, a projection lens, a stage mounted to the frame for positioning a transparency thereon for view, delivery means for gripping and slidingly moving an unframed transparency along the surface of said stage, a magazine holding a stack of unframed transparencies for insertion into the frame adjacent to said stage, feed means for feeding the uppermost transparency from a stack of transparencies in the inserted magazine, and suitable drive means. A second magazine and second feed means can be included in the system for bedirectional changing of unframed transparencies. An electrical logic circuit interfacing with a control module can be included in the system for control. The mechanism for changing unframed transparencies can be isolated and built in a detached unit for use with a conventional image projector which does not have such a built-in mechanism.

REFERENCES:
patent: Re27976 (1974-04-01), Sahley
patent: 3110217 (1963-11-01), Millner et al.
patent: 3352202 (1967-11-01), Woodrow
patent: 3594082 (1971-07-01), Lonchar

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