Stop motion mechanism

Claim 1

IN A CARDING MACHINE, A STOP MOTION MECHANISM COMPRISING A FEED ROLL HAVING AN INSULATED SHAFT, A FEED ROLL PLATE POSITIONED BENEATH SAID FEED ROLL, A CONTACT STUD POSITIONED ABOVE SAID FEED ROLL, SAID SHAFT, PLATE AND CONTACT STUD BEING CONNECTED TOGETHER IN ELECTRICAL CIRCUIT, SAID FEED ROLL AND SAID CONTACT STUD BEING ARRANGED TO CLOSE SAID ELECTRICAL CIRCUIT WHEN SAID FEED ROLL IS MOVED INTO CONTACT WITH SAID STUD, SAID FEED ROLL AND SAID PLATE BEING ARRANGED TO CLOSE SAID ELECTRICAL CIRCUIT WHEN A CURRENTCONDUCTING OBJECT IS IN CONTACT THEREBETWEEN, A DOFFER ROLL, MOVABLE SENSING MEANS POSITIONED ADJACENT SAID DOFFER ROLL AND ARRANGED FOR THE DETECTION OF AN OBSTRUCTION WITH RESPECT TO SAID ROLL, SAID SENSING MEANS BEING CONNECTED IN SAID ELECTRICAL CIRCUIT AND ARRANGED TO CLOSE SAID CIRCUIT WHEN SAID OBSTRUCTION IS DETECTED, A DRIVE ASSEMBLY FOR SAID MACHINE, A GEAR TRAIN ARRANGED TO CONNECT SAID FEED ROLL AND SAID DOFFER ROLL TO EACH OTHER AND TO SAID DRIVE ASSEMBLY, SAID GEAR TRAIN INCLUDING A DOFFER GEAR DISPOSED ADJACENT SAID DOFFER ROLL, SAID DRIVE ASSEMBLY INCLUDING A PRODUCTION CHANGE GEAR AND SHAFT THEREFOR, SAID SHAFT HAVING A DROP LEVER DISPOSED THEREON ADJACENT SAID PRODUCTION CHANGE GEAR, SAID SHAFT AND LEVER BEING ADAPTED TO VERTICAL MOVEMENT FOR ENGAGEMENT AND DISENGAGEMENT OF SAID PRODUCTION CHANGE GEAR AND SAID DOFFER GEAR, AN AIR CYLINDER DISPOSED ADJACENT SAID DROP LEVER, AND MEANS CONNECTED TO SAID CYLINDER AND TO SAID ELECTRICAL CIRCUIT FOR ACTUATING SAID CYLINDER TO DROP SAID LEVER WHEN SAID CIRCUIT IS CLOSED.