Optics: image projectors – Slide transfer mechanism – Slides reciprocated horizontally
Patent
1975-02-11
1976-04-13
Bell, Jr., Houston S.
Optics: image projectors
Slide transfer mechanism
Slides reciprocated horizontally
353117, G03B 2304, G03B 2306
Patent
active
039500870
ABSTRACT:
A slide projector adapted to alternately receive at least two slide trays having different shapes and different indexing configurations is provided. The projector includes a slide tray receiving groove having tray guide means for slidably engaging corresponding support surfaces formed on the slide trays, and an indexing mechanism having suitable drive gears for engagement with either of the alternate trays, to incrementally advance either of said trays from one slide position to the next. The projector also includes in one embodiment slidable tray retainer means normally biased into the tray receiving groove to support the edge of one said trays to maintain the same in engagement with the indexing mechanism, and means to urge such retainer out of the tray receiving groove upon insertion therein of the other of said trays.
REFERENCES:
patent: 3359668 (1967-12-01), Badalich
patent: 3554639 (1968-01-01), Robinson
patent: 3572921 (1971-03-01), Mulch
patent: 3704943 (1972-12-01), Rube
Bell, Jr. Houston S.
Dresner Arthur
GAF Corporation
Kehm Walter C.
Stephan Steven L.
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