Valve system for controlling a pressure fluid to a thread cutter combined with a sewing machine

Claim 1

IN A SEWING MACHINE HAVING STITCH-FORMING MEANS AND CUTTING MEANS ADJACENT SAID STITCH-FORMING MEANS FOR SEVERING A THREAD STITCHED INTO WORKPIECE, THE COMBINATION THEREWITH OF OPERATING MECHANISM FOR SAID CUTTER MEANS COMPRISING A CONDUIT CONNECTED TO A SOURCE OF FLUID UNDER PRESSURE, NORMALLY CLOSED VALVE IN SAID CONDUIT, AN ACTUATING MEMBER FOR SAID VALVE BIASED TO KEEP THE LATTER CLOSED, CAM-FOLLOWER MEANS COUPLED WITH SAID ACUTATING MEMBER, AN OPERATING ELEMENT DISPLACEMENT BETWEEN A NORMAL AND AN OFF-NORMAL POSITION, CAM MEANS POSITIONED FOR CO-OPERATION WITH SAID CAM-FOLLOWER MEANS, AND A RESILIENT CONNECTION LINKING SAID ELEMENT WITH SAID CAM MEANS FOR YIELDABLY ENTRAINING THE LATTER INTO CONTACT WITH SAID CAM-FOLLOWER MEANS AND AFTER A TEMPORARY DWELL PROPELLING SAID CAM MEANS AT INCREASED SPEED PAST SAID CAM-FOLLOWER MEANS MOMENTARY TRIPPING OF SAID OF SAID ELEMENT.