Dual photographic slide projector

Details Dual photographic slide projector Dual photographic slide projector

1977-06-14

1978-11-28

Stephan, Steven L.

Optics: image projectors

Slide transfer mechanism

Slides reciprocated horizontally

353 94, G03B 2304

Patent

active

041273249

ABSTRACT:
A double slide projector having two slide projection assemblies, a common magazine for slides, and a common slide changer, uses a motion transmitting arrangement from a drive to the changer so that the changer is moved a full stroke for moving slides from the magazine to the more remote projection assembly and the changer motion is blocked at a partial stroke for movement of slides from the magazine to the nearer projection assembly. A drive provides sufficient movement to move the changer for a full stroke for each actuation, and a slip clutch is arranged in the motion transmitting device so that the changer can move alternately between a full-stroke and a blocked or partial-stroke position. A double-track cam is preferred for the drive, and an arrangement of levers connected through the slip clutch is preferred for transmitting motion from the cam to the gripper portion of the slide changer.

REFERENCES:
patent: 3242804 (1966-03-01), Brinkmann
patent: 3572920 (1971-03-01), Heinzmann
patent: 3847472 (1974-11-01), Sobotta

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