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Source Technologies, Inc.

Source Technology Corporation

Source Kramer Corporation

Gideon A Kramer

Milo G Kramer

Albert S Ballard

Multiple projection optics slide projection apparatus using a circular

The slide projector includes side-by-side image-projection systems and a circular slide tray, with slides passing in operation directly between the slide tray and either of two slide gates, the slide gates moving between a first position in which slides are acquired and released, and a second position in which slides are projected onto a screen. A slide lifter, a slide tray lock, slide clamps on each slide gate, and the slide gates are operated in a particular sequence relative to the movement of the slide tray to insure proper handling of the slides in the projector. The slide tray fits on a central hub which in turn is independently driven. Sensors are provided to continuously detect the position of the lifter, the slide gates, and the slide tray. A front end assembly which incorporates lenses which move laterally and vertically, with the longitudinal axes of the lenses remaining parallel at all times, provides precise image alignment, including image overlap and separation.

Slide projector having two image-projection systems which operate with a

The slide projector includes a side-by-side image-projection systems and a circular slide tray, with slides passing in operation directly between the slide tray and either of two slide gates, the slide gates moving between a first position in which slides are acquired and released, and a second position in which slides are projected onto a screen. A slide lifter, a slide tray lock, slide clamps on each slide gate, and the slide gates are operated in a particular sequence relative to the movement of the slide tray to insure proper handling of the slides in the projector. The slide tray fits on a central hub which in turn is independently driven. Sensors are provided to continuously detect the position of the lifter, the slide gates, and the slide tray. A front end assembly which incorporates lenses which move laterally and vertically, with the longitudinal axes of the lenses remaining parallel at all times, provides precise image alignment, including image overlap and separation.

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 side 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 movement 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.

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Seattle, WA, United States of America

Gideon A Kramer