Builder mechanism

Claim 1

IN A TWISTER FRAME HAVING TRAVERSING ELEMENTS MOUNTED FOR VERTICAL RECIPROCATORY MOVEMENT FOR WINDING STRAND ON A PACKAGE, BUILDER MECHANISM FOR PRODUCING TRAVERSING MOVEMENT OF SAID TRAVERSING ELEMENTS COMPRISING MEANS CONSTRUCTED AND ARRANGED TO PRODUCE A PREDETERMINED PATTERN OF CYCLICAL TRAVERSING MOVEMENT OF SAID TRAVERSING ELEMENT, AND A PICK MECHANISM COMPRISING A DIFFERENTIAL DEVICE CONNECTED BETWEEN SAID OSCILLATORY BUILDER MOTION PRODUCING MEANS AND SAID TRAVERSING ELEMENTS ADAPTED FOR TRANSMITTING SAID PATTERN OF MOVEMENT AND FOR ADVANCING SAID PATTERN TO WIND SAID PACKAGE, INCLUDING A ROTARY INPUT ELEMENT, A CONNECTION FROM SAID CYCLICAL TRAVERSING MOVEMENT PRODUCING MEANS FOR IMPARTING ROCKING MOVEMENT TO SAID ROTARY INPUT ELEMENT, A ROTARY OUTPUT ELEMENT SUPPORTED PARALLEL TO AND ADJACENT SAID ROTARY INPUT ELEMENT, A ROTARY CONTROL ELEMENT PROVIDING A DIFFERENTIAL CONNECTION BETWEEN SAID ROTARY INPUT AND OUTPUT ELEMENTS FOR OSCILLATING SAID OUTPUT ELEMENT WITH SAID INPUT ELEMENT AND FOR EACH OSCILLATION OF SAID INPUT ELEMENT IN ONE DIRECTION IMPARTING A STEPPED ADVANCING MOVEMENT TO SAID ROTARY OUTPUT ELEMENT WITH RELATION TO SAID INPUT ELEMENT, CONNECTIONS INCLUDING A CLUTCHING DEVICE BETWEEN SAID ROTARY OUTPUT ELEMENT AND SAID TRAVERSING ELEMENTS, AND MEANS FOR CONTROLLING SAID CLUTCH TO MAINTAIN A SOLID CONNECTION BETWEEN SAID ROTARY OUTPUT ELEMENT AND SAID TRAVERSING MEANS, AND ALTERNATIVELY TO PERMIT A RETURN MOVEMENT OF SAID TRAVERSING MEANS RELATIVE TO SAID ROTARY INPUT ELEMENT.