Viewer attachment for motion picture projectors

Claim 1

A VIEWER ATTACHMENT FOR MOTION PICTURE FILM PROJECTORS COMPRISING A VIEWER HOUSING, A RELATIVELY WIDE SCREEN ON WHICH FILM IMAGES ARE TO BE VIEWED SUPPORTED BY SAID HOUSING, A LENS SYSTEM ON SAID HOUSING FOR TRANSMITTING AN IMAGE FROM THE MOTION PICTURE FILM TO BE VIEWED, SAID LENS SYSTEM BEING ADAPTED TO BE INSERTED INTO THE LENS MOUNTING OF A MOTION PICTURE PROJECTOR AFTER THE PROJECTOR LENS HAS BEEN REMOVED AND, THUSLY, BE POSITIONED ADJACENT THE FILM PLANE OF THE MOTION PICTURE FILM TO BE VIEWED, SAID LENS SYSTEM BEING A WIDE ANGLE, SHORT FOCAL LENS SYSTEM, A MIRROR IN SAID HOUSING FOR REFLECTING THE IMAGE TRANSMITTED BY THE LENS SYSTEM AND PROJECTING IT ON SAID SCREEN, THE OPTICAL PATH OF SAID LENS SYSTEM BEING SUBSTANTIALLY PARALLEL TO THE PLANE OF SAID SCREEN, SAID MIRROR BEING DISPOSED AT APPROXIMATELY 45* TO THE OPTICAL PATH OF THE LENS SYSTEM TO THEREBY REFLECT THE TRANSMITTED IMAGE FROM THE LENS SYSTEM ON TO SAID SCREEN, AND SAID HOUSING INCLUDING AN ADJUSTABLE LATERALLY EXTENDING STANDARD MEANS FOR ENGAGING SURFACES OF THE PROJECTOR ON WHICH SAID ATTACHMENT IS TO BE PLACED FOR DISPOSING AND MAINTAINING SAID SCREEN IN A SUBSTANTIALLY VERTICAL POSITION.