Lock system for blasting-machine blades

Claim 1

IN COMBINATION WITH A BLASTING MACHINE INCLUDING A ROTOR HAVING SPACED PARALLEL SIDE PLATES PERPENDICULAR TO THE AXIS OF ROTATION OF SAID ROTOR, SAID PLATES HAVING OPPOSITE SUBSTANTIALLY RADIAL GROOVES IN THE ADJACENT SURFACES OF SAID PLATES, RESPECTIVELY, SAID ROTOR ALSO HAVING BLADES WITH THE EDGES THEREOF RECEIVED IN SAID GROOVES, A LOCKING SYSTEM FOR DISENGAGEABLY RETAINING THE SAID BLADES IN THE SAID GROOVES, COMPRISING: MEANS ON SAID SIDE PLATES FORMING OPPOSITE RECESSES IN SAID ADJACENT SURFACES; AN ABUTMENT MOUNTED ON SAID BLADE ON THE BACK SURFACE THEREOF; AND A LOCKING MEMBER HAVING THE ENDS THEREOF NORMALLY ROTATABLY RECEIVED IN THE SAID RECESSES, AND HAVING A CENTRAL PORTION NORMALLY DISPOSED RADIALLY OUTWARD FROM SAID ABUTMENT, SAID CENTRAL PORTION BEING ECCENTRIC WITH RESPECT TO THE ENDS OF SAID LOCKING MEMBER WHEREBY SAID LOCKING MEMBER IS ROTATABLY BETWEEN A POSITION WHEREIN SAID ABUTMENT IS FREE TO PASS UNDERNEATH SAID CENTRAL PORTION, AND A LOCKING POSITION WHEREIN SAID ABUTMENT IS ENGAGEABLE WITH SAID CENTRAL PORTION WHICH INCLUDES A RADIALLY WITH ING ELONGATED ARM INTEGRAL WITH THE LOCKING MEMBER BETWEEN THE SIDE PLATES AUTOMATICALLY TO URGE THE LOCKING MEMBER TO LOCKING POSITION BY CENTRIFUGAL FORCE EFFECTED IN RESPONSE TO ROTATION MOVEMENT OF THE ROTOR AND WHICH OPERATES THE LOCKING MEMBER OF ROTATIONAL MOVEMENT TOWARD AND AWAY FROM LOCKING POSITION.