Driving mechanism for abrading tool

Claim 1

IN AN ABRADING TOOL HAVING A HOUSING, AN OSCILLATING PLATEN, AND MEANS TO RESILIENTLY MOUNT THE PLATEN TO THE HOUSING, A DRIVING MECHANISM FOR THE PLATEN, COMPRISING, IN COMBINATION: (A) A DRIVE SPINDLE JOURNALLED IN THE HOUSING; (B) A CYLINDRICAL DRIVE PIN HAVING ITS AXIS ECCENTRIC TO THE AXIS OF SAID SPINDLE; (C) A COUNTERBALANCE BETWEEN SAID PIN AND SAID SPINDLE; (D) MEANS TO SECURE SAID PIN TO SAID SPINDLE; SAID MEANS INCLUDING MEANS TO RETAIN SAID COUNTERBALANCE BETWEEN SAID PIN AND SAID SPINDLE AND TO POSITION SAID COUNTERBALANCE CIRCUMFERENTIALLY WITH RESPECT TO THE AXIS OF SAID DRIVE PIN; (E) A BEARING RETAINER ON TOP OF THE PLATEN AND MEANS TO SECURE SAID RETAINER AGAINST ROTATION; (F) SAID RETAINER HAVING A SPHERICAL SEAT FORMED THEREIN; AND (G) A SPHERICAL SLEEVE BEARING IN SAID SEAT TO JOURNAL SAID DRIVE PIN; (H) WHEREBY SAID SPHERICAL BEARING, SAID BEARING RETAINER, AND THE PLATEN ARE FRE TO MOVE VERTICALLY WITH RESPECT TO THE CYLINDRICAL DRIVE PIN, BEING RETAINED OINLY BY THE MEANS TO RESILIENTLY MOUNT THE PLATEN TO THE HOUSING.