Glass stage and an overhead type projector system

Details Glass stage and an overhead type projector system Glass stage and an overhead type projector system

1988-08-29

1990-03-06

Haroian, Harry N.

Optics: image projectors

Transparent plate

Plate part of film gate

353DIG5, 353 79, 353 27R, G03B 2308

Patent

active

049060910

ABSTRACT:
A glass stage for use as an upper stage in an overhead type projector system. The glass stage includes a rectangular frame body having substantially the same dimension as that of a lower stage of a projector, a lower transparent plate fixed to the rectangular frame body, and an upper transparent plate which pushes a strip film onto the lower transparent plate. The upper plate is rotatably supported by brackets provided on the frame body. Each of the brackets is provided with a longitudinal hole which engages with hinge pins for guiding movement of the upper transparent plate in a drawing direction thereof. The longitudinal hole is provided with a portion inclined downwardly at an end of a pushing side of the upper transparent plate. The rectangular frame body is provided at one side portion thereof with small holes through which the upper stage-fitting pins are to be snugly fitted.

REFERENCES:
patent: 3424524 (1969-01-01), Akiyama et al.
patent: 3836242 (1974-09-01), Kluver et al.
patent: 4198137 (1980-04-01), Stites
patent: 4704019 (1987-11-01), Yamamoto

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