Textile machine with device for forming a yarn reserve on a bobbin tube during the winding operation and a yarn tension sensor cooperating with the device

Claim 1

In a textile machine, a combination, including a device for forming a yarn reserve at one end of a bobbin tube and comprising support means supporting a bobbin tube rotatable about its axis and tiltable about a pivot axis substantially parallel to the bobbin tube axis between a winding position and a release position; drive means cooperating with said bobbin tube for rotating the same, when in said winding position, about its axis; a first shaft substantially parallel to said pivot axis and rotated at a substantially slower speed than said bobbin tube is rotated by the drive means; a disc freely turnable mounted on said first shaft movable in axial direction thereof and having an engaging face including an obtuse angle with the axis of said first shaft and a notch extending inwardly from the periphery thereof; means biasing said disc along the axis of said first shaft in a first direction to a disengaged position; coupling means comprising cooperating portions on said disc and said first shaft for coupling said disc for rotation with said first shaft upon moving of the disc against said biasing means in a second directIon opposite to said first direction to an engaged position; a second shaft extending transverse to said pivot axis and having a reserve arm fixed at one end to and projecting substantially normal from said second shaft, said second shaft and said arm thereon being turnable between a rest position and a turned position, said arm having at the free end thereof a hooked yarn guide adapted to engage a yarn during turning of said arm from said turned to said rest position for winding the yarn on one end of said bobbin tube and to form a yarn reserve thereon; transmission means between said bobbin tube support means and said second shaft for turning the latter and said arm thereon from said rest to said turn position during tilting of said support means from said winding to said release position; yieldable locking means for locking said arm in said turn position and for releasing said arm when said support means is moved back to said winding position; biasing means biasing said second shaft and said arm thereon to return from said turned to said rest position after said locking means has released said arm; and engaging means carried by said arm intermediate the ends of the latter and arranged to engage said engaging face of said disc during movement of said arm from said turned to said rest position to move said disc to said engaged position so that the disc is rotated to thereby move said arm in a direction toward its turned position until said engaging means passes through said notch in said disc, whereby successive portions of said yarn reserve are wound in opposite directions and cover each other.