Automatic slide projector

Claim 1

IN A PHOTOGRAPHIC SLIDE PROJECTOR, THE COMBINATION COMPRISING: DRIVE MEANS INCLUDING A ROTATABLE POWER SHAFT; CLUTCH MEANS MOVABLE IN A PATH INTO AND OUT OF ENGAGEMENT WITH SAID SHAFT; MECHANICAL MEANS FOR MOVING SAID CLUTCH MEANS IN SAID PATH, INCLUDING A REPOSITIONABLE ARM; TRIPPABLE LATCH MEANS LOCKABLY ENGAGEABLE BY ONE END OF SAID ARM; MEANS PERIODICALLY OPERATING SAID MECHANICAL MEANS TO CAUSE MOVEMENT OF SAID CLUTCH MEANS OUT OF ENGAGEMENT WITH SAID POWER SHAFT AND TO CAUSE LOCKABLE ENGAGEMENT OF SAID ARM AND SAID LATCH MEANS, INCLUDING POWER TRANSMITTING MEANS OPERATIVE FROM SAID CLUTCH MEANS; A ROTATABLE OPERATING SHAFT SPACED APART FROM SAID POWER SHAFT; MEANS OPERATIVE BETWEEN SAID POWER TRANSMITTING MEANS AND SAID OPERATING SHAFT TO TRANSMIT OSCILLATIVELY ROTATIONAL MOTION TO SAID OPERATING SHAFT; MEANS DEFINING A PATHWAY FOR A SLIDE-CARRYING TRAY; INDEXING MEANS FOR STEPWISE ADVANCING A SAID TRAY ALONG SAID PATHWAY; ACTUATING MEANS INTERCONNECTED BETWEEN SAID OPERATING SHAFT AND SAID INDEXING MEANS; MEANS DEFINING A VIEWING FRAME ABOVE SAID PATHWAY; AND PUSHER ARM MEANS INCLUDING A PUSHER ARM FOR ENDWISE ENGAGING A PHOTOGRAPHIC SLIDE CARRIED BY SAID TRAY AND MEANS CONNECTING SAID PUSHER ARM TO SAID OPERATING SHAFT WHEREBY THE OSCILLATIVELY ROTATIONAL MOVEMENT OF SAID OPERATING SHAFT ACTUATES SAID PUSHER ARM FOR TRANSPORTING A SAID SLIDE TO AND FROM SAID VIEWING FRAME.