G - Physics – 03 – B
Patent
G - Physics
03
B
88/69
G03B 21/02 (2006.01) G03B 23/06 (2006.01) G03B 23/18 (2006.01)
Patent
CA 1116900
MULTIPLE OPTICS SLIDE PROJECTOR Abstract of Disclosure The projector includes two projection optics systems and two slide gates which move slides acquired from a slide receptacle into and out of a viewing position in all of the projection optics systems. The slide gates are movable between a first position, which is common to both slide gates and in which slides are moved between the slide receptacle and the slide gate means, and the second position in one of the projection optics systems. The slides move by gravity from the slide receptacle into the slide gates and by means of a slide lifter from the slide gates back into the slide receptacle. A combination of a scalloped gear matching the depending lugs on the slide receptacle and a stepping motor to control the movement of the gear provides efficient and economical control over the move- ment of the slide receptacle. The slide gates, the slide lifter, and the slide receptacle gearing are independent of each other in operation, so that they may be activated in any sequence.
326175
Frayne & Company Robert
Kramer Gideon A.
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