Package control mechanism for winding machines

Claim 1

IN A WINDING MACHINE FOR WINDING YARN UPON A ROTATING PACKAGE WHEREIN THE PACKAGE IS ROTATED BY FRICTIONAL CONTACT WITH A DRIVE ROLL AND IS SUPPORTED ON AN ARM MOUNTED ON A FRAME FOR MOVEMENT TO AND FROM AN OPERATIVE POSITION WITH SAID PACKAGE CONTACTING SAID ROLL, SAID ARM BEING BIASED TO MOVE AWAY FROM SAID OPERATIVE POSITION TO SEPARATE SAID PACKAGE FROM SAID ROLL, THE IMPROVEMENT COMPRISNG LATCH MEANS FOR SAID ARM, SAID LATCH MEANS COMPRISING A MOVABLE LATCH ELEMENT AND A SURFACE OF ABUTMENT FOR SAID LATCH ELEMENT, ONE OF SAID ELEMENT AND SURFACE BEING CARRIED ON SAID FRAME AND THE OTHER ON SAID ARM, SAID ELEMENT ENGAGING SAID SURFACE TO MAINTAIN THE ARM IN SAID OPERATIVE POSITION AGAINST SAID BIAS DURING NORMAL WINDING, MEANS FOR DETECTING THE PRESENCE OF YARN WOUND UPON SAID DRIVE ROLL INSTEAD OF SAID PACKAGE, MEANS FOR DETECTING AN INTERRUPTION IN THE FLOW OF YARN TO SAID PACKAGE, MEANS FOR DETECTING THE COMPLETION OF A PACKAGE, AND MEANS RESPONSIVE TO EACH OF SAID DETECTING MEANS FOR MOVING SAID LATCH ELEMENT OUT OF ENGAGEMENT WITH SAID SURFACE WHEREBY THE ARM IS FREE TO MOVE AWAY FORM SAID OPERATIVE POSITION UNDER THE INFLUENCE OF SAID BIAS AND THEREBY SEPARATE SAID PACKAGE FROM SAID DRIVING ROLL.