Quick change expendable brush for dulling machines

Claim 1

IN A DULLING MACHINE OF THE TYPE ADAPTED TO PERMIT QUICK REMOVAL AND REPLACEMENT OF AN EXPENDABLE DULLING BRUSH MOUNTED BETWEEN A PAIR OF ARBORS JOURNALED IN BEARINGS FOR ROTARY MOTION, THE COMBINATION WHICH COMPRISES, A NON-AXIALLY MOVEABLE FIRST ARBOR, AN AXIALLY MOVEABLE SECOND ARBOR ALIGNED WITH SAID FIRST ARBOR IN SPACED APART RELATION THERETO, A DULLING BRUSH HAVING A TUBULAR CORE, AND MEANS DIRECTLY DRIVING ONLY SAID FIRST ARBOR TO IMPART ROTARY MOTION THERETO, THE INNER ENDS OF SAID ARBORS HAVING RADIALLY ENLARGED HEADS ADAPTED TO ENTER AND RELEASABLY ENGAGE THE OPPOSITE OPEN ENDS OF SAID BRUSH CORE, EACH OF SAID HEADS HAVING ELONGATED MALE COUPLING CLUTCH MEANS, AND SAID BRUSH CORE HAVING ELONGATED SLOT FEMALE COUPLING CLUTCH MEANS, SAID ELONGATED MALE AND FEMALE COUPLING CLUTCH MEANS BEING ADAPTED TO FIRMLY INTERLOCK, WITH SAID BRUSH CORE IN DIRECT ENGAGEMENT WITH SAID ARBORS, WHEREBY SAID BRUSH CORE IS ADAPTED TO IMPART ROTARY MOTION TO SAID SECOND ARBOR WITHOUT PERMITTING ROTATIVE SHIFTING MOVEMENT OF THE BRUSH RELATIVE TO SAID ARBOR HEADS DURING BRUSH OPERATION.