Lawn treating machines

Claim 1

AN ATTACHMENT FOR USE WITH A MOWER COMPRISING A WHEELED HOUSING HAVING AN OPEN LOWER END, A PRIME MOVER THEREON AND PROVIDED WITH AN ELONGATED CUTTING BLADE SUPPORT ON AND ROTATABLE ON A GENERALLY VERTICAL AXIS IN SAID HOUSING, SAID ATTACHMENT COMPRISING A PAIR OF SHAFTS, NUT AND BOLT MEANS FOR SUPPORTING SAID SHAFTS BENEATH SAID CUTTING BLADE PARALLEL TO SAID BLADE AND ON OPPOSITE SIDES OF THE BLADE AXIS, ENLARGED HEADS ON SAID BOLTS, THE ENDS OF SAID SHAFTS EXTENDING THROUGH APERTURES IN SAID BOLT HEADS AND BEING KEYED TRANSVERSELY THROUGH SAID BOLT HEADS AND SAID SHAFT ENDS, A PLURALITY OF TORSION SPRINGS HAVING COILED INTERMEDIATE PORTIONS LOOSELY SUPPORTED ON SAID SHAFT MEMBERS, SAID SPRINGS HAVING ONE END DEPENDING DOWNWARDLY TO ENGAGE THE GROUND AT AN OBTUSE ANGLE RELATIVE TO SAID GROUND WHEN SAID BLADE IS ROTATING TO PROVIDE A MULCHING ACTION, AND ANOTHER FREE END EXTENDING REARWARDLY OF SAID SHAFT MEMBERS TO BEAR AGAINST THE UNDERSURFACE OF SAID CUTTING BLADE.