Apparatus for controlling the ring rail movement of a ring twisting machine

Claim 1

AN ELECTRO-HYDRAULIC CONTROL FOR THE MOVEMENT OF A RING-RAIL OF A TEXTILE RING TWISTING MACHINE COMPRISING A WORKING CYLINDER, A WORKING PISTON WHICH CAN RECIPROCATE IN SAID WORKING CYLINDER, A PISTON ROD CONNECTED TO SAID PISTON FOR TRANSMITTING MOTION TO SAID RING RAIL, DUCTS LEADING INTO SAID WORKING CYLINDER ON OPPOSITE SIDES OF SAID PISTON, A REVERSING VALVE CONNECTED WITH SAID DUCTS, A LIQUID SUPPLY TANK, A PUMP CONNECTED WITH SAID SUPPLY TANK AND SAID REVERSING VALVE FOR SUPPLYING LIQUID TO SAID REVERSING VALVE AND THENCE TO SAID WORKING CYLINDER, A REFLUX DUCT CONNECTED WITH SAID SUPPLY TANK AND SAID REVERSING VALVE, A SUPPLY RATE GOVERNOR IN SAID REFLUX DUCT, A SECOND VALVE CONNECTED IN PARALLEL WITH SAID GOVERNOR AND ADAPTED WHEN OPENED TO BRIDGE SAID GOVERNOR, AND MEANS FOR OPENING SAID SECOND VALVE AT THE BEGINNING AND AT THE END OF A WINDING OPERATION OF SAID MACHINE FOR INCREASING THE SPEED OF MOVEMENT OF SAID RING-RAIL AT THE BEGINNING AND AT THE END OF THE WINDING OPERATION.