Projector with controls for the slide changer

In a slide changing apparatus for magazine slide projectors having slide pushrods driven by control means, one of said pushrods serving to insert the slides into an image aperture and the other to move back those slides that have been projected into the magazine, a transport path and a projecting stage located in a common plane and the insertion pushrod serving to insert slides along said path, a slide return path located alternatively on either side of said common plane, driving means transporter means actuated said driving means to transport a slide that has been projected from said projecting stage to said return path, and also to transport said magazine in the same direction, said other pushrod acting to move a slide that has been transported to said return path along said return path back to said magazine, said transporter means being operable alternatively to move a slide to either side of said common plane to give either a forward or reverse operation, said control means being operative so that the pushrods and the driving means operate to move a slide from the magazine to the projection stage, then to the return path, and then back to the magazine, the improvement comprising:

• stop means (8,11) actuated by said control means, said control means comprising motor driven cams (B", R", S", T") with surfaces thereon for initiating closing of said stop means simultaneously with removal of a first slide from said projection stage and the movement of a second slide to said projection stage and initiating opening of said stop means after the complete closure of said stop means which coincides with the terminated insertion of said second slide, and interlocking means (14-18) provided in said projection stage (20) maintaining said stop means closed in change processes lacking slide insertion and means for overriding when said second slide is introduced or when said first slide is reinserted, said means for overriding acting through said slides themselves.