Strand handling apparatus
摘要:
STRAND HANDLING APPARATUS INCLUDING A SYSTEM FOR CONTROLLING A CYCLING TENDER WHICH SCANS AND SERVICES BOBBIN WINDING STATIONS ON A SPINNING OR TWISTING MACHINE, OR THE LIKE. THE CONTROL SYSTEM PROVIDES A SIGNAL INDICATING WHEN A STATION BEING SCANNED IS OPERATIONAL AND A SERVICE SIGNAL WHEN THE STATION REQUIRES SERVICING UPON RECEIPT OF BOTH OF THESE SIGNALS THE CONTROL SYSTEM INITIATES A WORK CYCLE OF THE TENDER TO SERVICE THE STATION. THE SERVICE SIGNAL IS PROVIDED EITHER WHEN THE BOBBIN AT THE SCANNED STATION IS READY TO BE DOFFED OR WHEN THERE IS AN INTERRUPTION IN THE ADVANCING STRAND TO THE BOBBIN. IF THERE ARE MORE THAN A PREDETERMINED NUMBER OF SUCH INTERRUPTION SIGNALS DURING A CYCLE, THIS SIGNAL IS RENDERED INEFFECTIVE BY THE CONTROL SYSTEM TO CAUSE SERVICING OF THE STATION. IF A ROLL-WRAP OCCURS ON A DRAFTING ROLL, AN INDICATOR WHICH COOPERATES IN PROVIDING THE OPERATIONAL SIGNAL IS MOVED TO A NON-OPERATIONAL POSITION SO THAT THIS SIGNAL IS NOT PROVIDED AND THEREAFTER THE TENDER BY-PASSES ONLY THE PARTICULAR STATION UNTIL THE STATION IS AGAIN PLACED IN OPERATIONAL CONDITION, AS BY AN ATTENDANT. WHEN THE INDICATOR IS MOVED TO ITS NON-OPERATIONAL POSITION IT CAUSES THE STRAND TO BE BROKEN PRIOR TO ENTERING DRAFTING ROLLS OF THE STATION.
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