Device for positioning a rotatable member

Claim 1

IN A SLIDE PROJECTOR HAVING A ROTATABLE MAGAZINE WITH A PLURALITY OF RADIALLY DISPOSED SLOTS FOR RECEIVING SLIDES, A MECHANISM FOR PREVENTING THE FREE ROTATION OF THE MAGAZINE, A DEVICE FOR RELEASING THE FORESAID MECHANISM TO ENABLE FREE ROTATION OF THE MAGAZINE AND MEANS FOR ROTATING SAID MAGAZINE THROUGH AN ANGLE SUBTENDED BY TWO ADJACENT SLOTS TO SUCCESSIVELY POSITION EACH SLOT FOR PROJECTING THE SLIDE CARRIED THEREIN, THE COMBINATION THEREWITH OF A REPEATING DEVICE, COMPRISING MEANS FOR ROTATING THE MAGAZINE THROUGH AN ANGLE SUBTENDED BY TWO PREDETERMINED, SPACED-APART, NON-ADJACENT SLOTS, SAID ROTATING MEANS MOVABLY MOUNTED ADJACENT THE MAGAZINE, MEANS FOR MOVING SAID ROTATING MEANS INTO OPERATIVE ENGAGEMENT WITH THE MAGAZINE, MEANS FOR ACTUATING THE RELEASING DEVICE, MEANS FOR DELAYING THE OPERATION OF THE ROTATING DEVICE UNTIL AFTER THE RELEASING DEVICE IS ACTUATED, AW FIRST INDICATOR ELEMENT REMOVABLY ATTACHED TO THE MAGAZINE AT A FIRST POSITION, A SECOND INDICATING ELEMENT REMOVABLY ATTACHED TO THE MAGAZINE AT A SECOND POSITION, AND MEANS RESPONSIVE TO SAID ELEMENTS FOR CONTROLLING SAID ROTATING MEANS, SAID MOVING MEANS AND SAID ACTUATING MEANS.