Cassette case for simultaneous tomography containing a stack of film assemblies

Claim 1

DEVICE FOR THE SIMULTANEOUS TOMOGRAPHY OF A BODY SUPPORTED ON A TABLE OF A RADIOGRAPHIC UNIT, THE DEVICE BEING ADAPTED TO BE SUPPORTED BY A CASE WHICH IS MOVABLE LONGITUDINALLY OF THE TABLE ON THE SIDE OF THE TABLE OPPOSED TO SAID BODY BY AN X-RAY SOURCE MOVABLE LONGITUDINALLY OF THE TABLE SO THAT THE CASE MOVES IN UNISON WITH BUT IN THE OPPOSITE DIRECTION TO THE X-RAY SOURCE, THE DEVICE HAVING A LONGITUDINAL AXIS ADAPTED TO EXTEND LONGITUDINALLY OF THE TABLE AND CONTAINING IN COMBINATION: A SUPPORT, A STACK OF ADJOINING RELATIVELY MOVABLE THIN ASSEMBLIES, EACH ASSEMBLY COMPRISING A RADIATION-SENSITIVE FILM AND TWO INTENSIFYING SCREENS, ONE OF SAID INTENSIFYING SCREENS DISPOSED ON EACH SIDE OF THE FILM, GUIDE MEANS ASSOCIATED WITH THE ASSEMBLIES FOR GUIDING THE ASSEMBLIES SO THAT THEY ARE MOVABLE RELATIVE TO EACH OTHER IN A PLURALITY OF PARALLEL PLANES IN A DIRECTION PARALLEL WITH SAID LONGITUDINAL AXIS, AND AN ACTUATING MECHANISM COMPRISING AN ARM MOUNTED TO PIVOT RELATIVE TO THE SUPPORT ABOUT AN AXIS SUBSTANTIALLY PERPENDICULAR TO SAID PLANES FROM ONE SIDE TO THE OTHER OF A FIRST PLANE PERPENDICULAR TO SAID LONGITUDINAL AXIS AND ENGAGING PORTIONS OF THE ASSEMBLIES AT POINTS ON THE ARM WHICH ARE AT RESPECTIVELY INCREASING DISTANCES FROM THE PIVOTAL MOUNTING OF THE ARM FROM ONE ASSEMBLY TO THE NEXT ADJACENT ASSEMBLY, WHEREBY PIVOTAL MOVEMENT OF THE ARMS FROM ONE SIDE OF THE OTHER OF SAID FIRST PLANE SHIFTS THE ASSEMBLIES IN SAID PLANES AND IN SAID DIRECTION TO DIFFERENT EXTENTS, THE ACTUATING MECHANISM FURTHER COMPRISING A FIRST MEMBER WHICH CO-OPERATES WITH SAID ARM, IS MOVABLE RELATIVE TO THE DEVICE FROM ONE SIDE TO THE OTHER OF A SECOND PLANE PERPENDICULAR TO SAID LONGITUDINAL AXIS AND ADAPTED TO CO-OPERATE WITH AND BE MOVABLY BY A SECOND MEMBER RIGID WITH THE TABLE WHEN THE CASE AND THE DEVICE SUPPORTED THEREBY MOVE LONGITUDINALLY OF THE TABLE AND MEANS INTERCONNECTING THE ARM AND THE FIRST MEMBER SO THAT MOVEMENT OF THE FIRST MEMBER FROM ONE SIDE OF THE OTHER OF SAID SECOND PLANE CAUSES MOVEMENT OF THE ARM FROM ONE SIDE TO THE OTHER OF SAID FIRST PLANE, WHEREBY THE FILMS OF THE ASSEMBLIES HAVE FORMED THEREON IN OPERATION OF THE RADIOGRAPHIC UNIT IMAGES OF DIFFERENT PLANES OF SAID BODY, WHICH PLANES DEPEND ON SAID DISTANCES.