US 4,906,091 AGranted

Glass stage and an overhead type projector system

AssigneeSlidex Corporation

InventorJiro Ozeki

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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.

Claims15

Dependent claims

A glass stage adapted to be used as an upper stage in an overhead type projector, said projector comprising a substantially box-like projector body containing a light source unit, a frame-like lower stage supported on the projector body and adapted to reciprocally move longitudinally relative to the projector body, an upper stage-fitting member supported at one of side portions of the lower stage and adapted to reciprocally move laterally relative to the projector body, a pair of two upper stage-fitting pins upwardly projecting from the upper stage-fitting member, a supporting arm extending above the condenser lens from a corner of the projector body, and a reflecting mirror and a projecting lens system attached to the supporting arm, and

said glass stage comprising a rectangular frame body having substantially the same dimension as that of the lower stage, a lower transparent plate fixed to the rectangular frame body, and an upper transparent plate adapted to push a strip film onto the lower transparent plate and rotatably supported by brackets provided on the rectangular frame body through hinge pins, said hinge pins projecting sidewisely from the upper plate, each of the brackets being provided with a longitudinal hole which engages with the hinge pin for guiding movement of the upper transparent plate in a drawing direction thereof, the longitudinal hole being provided with a portion inclined downwardly at an end of a push-in side of the upper transparent plate, and the rectangular frame body being provided at one of side portions thereof with small holes through which the upper stage-fitting pins are to snugly be fitted.

A glass stage adapted to be used as an upper stage in an overhead type projector, said projector comprising a substantially box-like projector body containing a light source unit, a frame-like lower stage supported on the projector body and adapted to reciprocally move longitudinally relative to the projector body, an upper stage-fitting member supported at one of side portions of the lower stage and adapted to reciprocally move laterally relative to the projector body, and a pair of two upper stage-fitting pins upwardly projecting from the upper stage-fitting member,

said glass stage comprising a rectangular frame body having a lateral dimension greater than that of the projector body, a lower transparent plate fixed to the rectangular frame body, and an upper transparent plate freely openably hinged to the rectangular frame body and adapted to push a long strip film onto the lower transparent plate, the rectangular frame body being provided with a pair of elongated holes laterally extending at a front side portion thereof, the elongated holes being adapted to fit to the upper stage-fitting pins, and each of the elongated holes having a length not smaller than that of a projecting width of the rectangular frame body from the projector body.

Dependencies are inferred from the claim text.