Flexible magazine slide projector with movable lens

Details Flexible magazine slide projector with movable lens Flexible magazine slide projector with movable lens

1977-08-22

1978-06-13

Stephan, Steven L.

Optics: image projectors

Film gate

And lens support

353101, 353102, 353109, G03B 148, G03B 2120, G03B 2308

Patent

active

040945995

ABSTRACT:
A slide projector for use with magazines of the flexible type in which slides are supported for movement around a closed-loop path and are swingable one by one into and out of a slide-projection station about an axis defined by a rotary drive shaft. The magazine has individual clip-type slide-holding elements that slide along an endless path and have frames in which slides are held. A condensing lens is mounted and guided for movement from a normal operating position close to the slide-projection station and in the path of the slides, to a retracted position out of the path, with a combined reciprocating and swinging motion, and is moved back and forth by a rotary crank mechanism that is driven by the slide-feeding mechanism, to shift the lens rapidly out of and back into the operating position during each slide change, with a dwell in the retracted position for the change.

REFERENCES:
patent: 3729254 (1973-04-01), Frey
patent: 3990790 (1976-11-01), Styles

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