Centrifugal speed regulator for a surface working device

Claim 1

IN A SURFACE WORKING MACHINE, THE COMBINATION COMPRISING: A FRAME ADAPTED TO BE SUPPORTED AT SUBSTANTIALLY FIXED DISTANCE FROM A SURFACE TO BE WORKED; A VARIABLE SPEED MOTOR MOUNTED ON THE FRAME; A DRIVE MEMBER ROTATABLY MOUNTED ON THE FRAME ON AN AXIS PERPENDICULAR TO THE SURFACE AND DRIVEN IN A FORWARD DIRECTION BY THE MOTOR; A SURFACE WORKING MEMBER ROTATABLY MOUNTED COAXIALLY OF THE DRIVE MEMBER FOR LIMITED AXIAL MOVEMENT RELATIVE THERETO THROUGH A CONTINUOUS SERIES OF WORKING POSITIONS BETWEEN A RELIEVED POSITION NOT MORE THAN LIGHTLY ENGAGING THE SURFACE AND A FULLY ENGAGED POSITION FORCIBLY ENGAGING THE SURFACE; MEANS COUPLING THE SURFACE WORKING MEMBER ROTATIVELY TO THE DRIVE MEMBER, SAID COUPLING MEANS PERMITTING LIMITED RELATIVE ROTATION OF SAID TWO MEMBERS; MEANS INCLUDING COOPERATING ELEMENTS ON THE DRIVE MEMBER AND ON THE SURFACE WORKING MEMBER AND ACTING TO MOVE THE SURFACE WORKING MEMBER AXIALLY TOWARD SAID FULLY ENGAGED POSITION IN RESPONSE TO FORWARD ROTATION OF THE SURFACE WORKING MEMBER RELATIVE TO THE DRIVE MEMBER, AND CENTRIFUGALLY RESPONSIVE MECHANISM INTERCONNECTING SAID MEMBERS AND ACTING TO PRODUCE A TORQUE BETWEEN SAID MEMBERS IN A DIRECTION TO PRODUCE FORWARD ROTATION OF THE SURFACE WORKING MEMBER RELATIVE TO THE DRIVE MEMBER, SAID TORQUE INCREASING WITH INCREASING ROTATIONAL SPEED OF SAID MEMBERS, WHEREBY THE SURFACE WORKING MEMBER IS PRESSED ON THE SURFACE TO BE WORKED WITH A FORCE THAT INCREASES WITH INCREASING ROTATIONAL SPEED OF THE MEMBERS.