Roving stop motion for a spinning machine drafting system

Roving stop motion means for a spinning machine having roving drafting means including a pair of roving feed rollers defining a nip therebetween for transporting a traveling roving, said roving stop motion means comprising an actuating rod, drive means including a lever arm operably associated with said actuating rod, and a clamping member operably associated with said lever arm, said actuating rod being responsive to roving breakage for driving said clamping member by said lever arm to enter the nip between said feed rollers for separating said feed rollers and pressing the roving against one said roller, the improvement comprising carriage means mounted on said actuating rod for selective positioning and locking at differing locations along said actuating rod, said drive means being arranged on said carriage means asymmetrically with respect to the longitudinal extent of said actuating rod, and said carriage means being arranged on said actuating rod for selective repositioning and locking thereon in opposed dispositions turned 180 degrees to one another with respect to the longitudinal extent of said actuating rod.