Slide projector with dissolve

Claim 1

PROJECTING EQUIPMENT COMPRISING A PAIR OF PROJECTORS ARRANGED IN CLOSE ADJACENT RELATION FOR PROJECTION ON A COMMON SCREEN, EACH PROJECTOR HAVING AN ELECTRIC LIGHT SOURCE, A MAGAZINE POSITIONED CLOSELY ADJACENT SAID PROJECTORS WITH THE SLIDES CARRIED BY THE MAGAZINE IN POSITION FOR INSERTION IN THE PROJECTORS, SLIDE FEED MEANS FOR SEQUENTIALLY MOVING EACH ALTERNATE SLIDE FROM THE MAGAZINE TO ONE PROJECTOR AND EACH OTHER SLIDE TO THE OTHER PROJECTOR, SAID MEANS TO FEED ALTERNATE SLIDES TO ONE PROJECTOR AND THE OTHER SLIDES TO THE OTHER PROJECTOR BEING OPERABLE IN SEQUENCE, A SINGLE OPERATING HANDLE MOUNTED FOR TWO DISTINCT MOVEMENTS, MEANS OPERABLY CONNECTED TO SAID SINGLE OPERATING HANDLE AND OPERABLE BY MOVEMENTS OF SAID SINGLE OPERATING HANDLE ACCORDING TO ONE OF SAID DISTINCT MOVEMENTS FOR MOVING SAID SLIDE FEED MEANS TO FEED SLIDES TO SAID PROJECTORS, CONTROL MEANS FOR ALTERNATELY MAKING THE LIGHT OF THE ONE PROJECTOR BRIGHT WHILE DIMMING THE LIGHT OF THE OTHER PROJECTOR AND ALTERNATIVELY MAKING THE LIGHT OF THE OTHER PROJECTOR BRIGHT WHILE DIMMING THE LIGHT OF SAID ONE PROJECTOR, SAID CONTROL MEANS BEING OPERABLY CONNECTED TO SAID SINGLE OPERATING HANDLE FOR OPERATION ACCORDING TO THE OTHER OF SAID DISTINCT MOVEMENTS OF SAID SINGLE OPERATING HANDLE DIFFERENT FROM THE MOVEMENT TO OPERATE SAID MEANS TO FEED SLIDES FOR CONTROLLING THE BRIGHTNESS OF SAID LIGHTS AND BEING OPERABLE SO THAT WHEN THE SLIDES IN SAID PROJECTORS ARE STATIONARY SAID LIGHTS ARE DIMMED AND BRIGHTENED, AND SAID SLIDES ARE CHANGED IN THE PROJECTOR WHICH HAS THE DARKENED LIGHT WHEREBY MOVING IMAGES ON SAID SCREEN MAY BE COMPLETELY AVOIDED AND COMPLETE DARKNESS OF THE SCREEN IS AVOIDED, THE COMFORT LEVEL OF THE AUDIENCE BEING KEPT SUBSTANTIALLY UNIFORM WITHOUT WIDE VARIATIONS IN LIGHT INTENSITY.