Thread winding apparatus

Claim 1

A thread winding apparatus comprising means for rotating a bobbin to receive thread to be wound thereon, a thread guide for guiding thread to be wound on the bobbin, a shaft on which the threAd guide is mounted, means for lengthwise reciprocating the shaft parallel to the axis of the bobbin to cause the thread guide to traverse thereby to distribute turns of thread on the bobbin, a pair of stops on the shaft between which the thread guide is reciprocable lengthwise of the shaft relative to the shaft, and means for imparting to the thread guide a linear shift lengthwise of the shaft relative to the shaft at the end of each traverse of the thread guide and in the same direction that the thread guide has just traversed and at a linear velocity lengthwise of the shaft higher than the traversing velocity of the thread guide, said imparting means comprising a sleeve secured to one side of said thread guide and encompassing said shaft and slidable relative to the shaft and engageable with one of said stops, spring means urging said thread guide toward the other of said stops, said one of said stops comprising an electromagnet, means to actuate and deactuate said electromagnet thereby alternately to attract and release said thread guide to effect said linear shifts, and means to reverse the direction of reciprocation of said shaft simultaneously with the actuation and deactuation of said electromagnet.