Slide projector and indexing mechanism for alternate slide trays

Details Slide projector and indexing mechanism for alternate slide trays Slide projector and indexing mechanism for alternate slide trays

1974-09-19

1976-04-27

Aegerter, Richard E.

Optics: image projectors

Slide transfer mechanism

Slides reciprocated horizontally

353117, G03B 2304, G03B 2306

Patent

active

039531198

ABSTRACT:
A slide projector adapted to alternately receive at least two slide trays having different shapes and different indexing configurations is provided. The projector comprises a slide tray receiving groove having tray guide means for slidably engaging corresponding support surfaces formed on the slide trays, and a reversible slide tray indexing mechanism having an indexing lever mounted for slidable and pivotable movement and including a pair of pawls for sequential engagement with the respective indexing racks of the alternate trays, to incrementally advance either of said trays from one slide position to the next. A reciprocal slide carrier for transporting the slides from the trays to the viewing position is provided with a camway in operative engagement with the indexing lever to impart the required movement thereto during each slide changing cycle. The projector also includes slidable tray retainer means formed as a part of the tray guide means to support the edge of one of said trays to maintain the same in engagement with the indexing mechanism.

REFERENCES:
patent: 2711602 (1955-06-01), Wikland
patent: 3704943 (1972-12-01), Rube
patent: 3827796 (1974-08-01), Erchoff

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