Control system for bobbin-building mechanism

Claim 1

A CONTROL SYSTEM FOR A BOBBIN-BUILDING MECHANISM PROVIDED WITH A RECIPROCABLE MEMBER HAVING AT LEAST ONE SHIFTABLE DEAD-CENTER POSITION, COMPRISING: A FLEXIBLE LINK ATTACHED AT ONE END TO SAID RECIPROCABLE MEMBER; A FIRST LEVER PIVOTABLE ABOUT A FIRST FULCRUM; A SECOND LEVER PIVOTABLE ABOUT A SECOND FULCRUM, THE OTHER END OF SAID FLEXIBLE LINK BEING ATTACHED TO SAID FIRST LEVER AT A POINT WHOSE DISTANCE FROM SAID FIRST FULCRUM IS SUBSTANTIALLY EQUAL TO THE DISTANCE BETWEEN SAID FULCRA, THE LATTER DEFINING DIAGONALLY OPPOSITE CORNERS OF A QUADRANGLE HAVING A PAIR OF NONADJACENT SIDES CONSTITUTED BY SAID LEVERS; FIRST DRIVE MEANS FOR PERIODICALLY OSCILLATING ONE OF SAID LEVERS ABOUT ITS FULCRUM AT A RELATIVELY FAST RATE; SECOND DRIVE MEANS FOR OSCILLATING THE OTHER OF SAID LEVERS ABOUT ITS FULCRUM AT A RELATIVELY SLOW RATE, SAID SECOND DRIVE MEANS INCLUDING A REVERSIBLE POWER SOURCE AND A PAIR OF LIMIT SWITCHES ACTUATABLE BY SAID OTHER OF SAID LEVERS IN RESPECTIVE EXTREME POSITIONS THEREOF FOR REVERSING THE DIRECTION OF OPERATION OF SAID POWER SOURCE; GUIDE MEANS ENGAGED BY SAID LINK FOR LEADING IT AROUND AN ANGULAR PATH INCLUDING AT LEAST TWO CORNERS OF SAID QUADRANGLE OTHER THAN THOSE DEFINED BY SAID FULCRA, SAID GUIDE MEANS COMPRISING A DEFLECTING ELEMENT CARRIED ON SAID ONE OF SAID LEVERS AT A LOCATION REMOTE FROM ITS FULCRUM; AND THIRD DRIVE MEANS FOR PERIODICALLY DISPLACING ONE OF SAID LIMIT SWITCHES AT A RATE STILL SLOWER THAN THE RATE OF OSCILLATION OF SAID OTHER OF SAID LEVERS.