Hydraulic system for traversing winders

Claim 1

MEANS FOR EFFECTING RELATIVE MOTION BETWEEN A WINDING MACHINE SPOOL ELEMENT AND A MATERIAL GUIDING ELEMENT COMPRISING A HYDRAULIC FLUID PRESSURE SOURCE, A HYDRAULIC CYLINDER, A PISTON SLIDABLY MOUNTED IN SAID CYLINDER, SAID PISTON CONNECTED TO SAID SPOOL ELEMENT, A CHECK-VALVE, A MULTI-POSITION VALVE, A FIRST FLUID PRESSURE LINE CONNECTING ONE END OF SAID CYLINDER ON ONE SIDE OF SAID PISTON TO SAID PRESSURE SOURCE THROUGH SAID CHECKVALVE AND SAID MULTI-POSITION VALVE, A SECOND FLUID PRESSURE LINE CONNECTING THE OTHER END OF SAID CYLINDER ON THE OTHER SIDE OF SAID PISTON TO THE OTHER SIDE OF SAID FLUID PRESSURE SOURCE THROUGH SAID MULTI-POSITION VALVE, SAID MULTI-POSITION VALVE ADAPTED TO REVERSE THE CONNECTIONS OF THE ENDS OF SAID CYLINDER TO SAID FIRST AND SECOND FLUID PRESSURE LINES, AND MEANS FOR REVERSING SAID MULTI-POSITION VALVE IN RESPONSE TO THE MOVEMENT OF SAID PISTON PRIOR TO COMPLETION OF TRAVEL OF SAID PISTON IN EITHER DIRECTION SO THAT THE PRESSURE IN SAID FIRST FLUID LINE BUILDS UP AGAINST SAID CHECK-VALVE TO HALT THE MOVEMENT OF SAID PISTON AND REVERSE THE DIRECTION OF TRAVEL THEREOF.