Automatic disk stacking device

Claim 1

AN AUTOMATIC MAGNETIC DISK STACKING DEVICE FOR RANDOM ACCESS MEMORY DISKS WHICH HAVE A CENTRAL APERTURE DEFINING A SUBSTANTIAL INNER DIAMETER AND WHICH ARE GENERALLY CIRCULAR IN OUTLINE, SAID DEVICE COMPRISING, IN COMBINATION, A WHEELED BASE MEMBER, A REVERSIBLE DRIVE MOTOR MOUNTED ON THE BASE MEMBER, A PLURALITY OF VERTICALLY EXTENDING SPACED LEAD SCREWS MOUNTED IN AND PROJECTING UPWARDLY FROM THE BASE MEMBER, THE SCREWS BEING SYMMETRICALLY DISPOSED AT LIKE RADII ABOUT A COMMON AXIS SO THAT ALL THE LEAD SCREWS ARE CAPABLE OF SIMULTANEOUSLY ENGAGING THE INNER DIAMETER OF A MAGNETIC DISK IN A SLIDING LOW FRICTION FIT, THE LEAD DISTANCE BETWEEN ADJACENT TURNS OF THE THREADS OF THE LEAD SCREWS CORRESPONDING TO A DESIRED INCREMENT OF SPACING BETWEEN DISKS AND BEING GREATER THAN THE THICKNESS OF THE DISKS AND THE LEAD SCREW THREADS BEING THIN IN WIDTH RELATIVE TO THE WIDTH OF THE GROOVES INTERMEDIATE ADJACENT TURNS OF EACH THREAD, HUB MEANS ROTATABLY COUPLED TO THE UPPER ENDS OF SAID LEAD SCREWS AND SMALLER IN CROSS-SECTIONAL AREA THAN THE INNER DIAMETER OF SAID DISKS, AND MEANS MOUNTED IN THE BASE MEMBER AND INTERCONNECTING EACH OF THE LEAD SCREWS TO THE DRIVE MOTOR FOR DRIVING THE LEAD SCREWS IN SYNCHRONISM.