SLIDE CHANGER MECHANISM FOR SLIDE PROJECTORS

摘要

Slides in a slide projector are movable from their tray to projection position and vice versa by a reciprocable carriage which is driven by an electric motor through the intermediary of a friction clutch when it transports slides back into the tray and through the intermediary of the friction clutch and a second clutch, which latter can transmit a weaker force than the friction clutch, when the slides are moved from the tray to projection position so that a slide which jams during movement toward projection position can be returned to the tray because the carriage is driven with a greater force when it moves slides back into the tray.