Patent ID: 6904745

Claim:
Thread-guiding device for collecting spun yarns on bobbins, particularly for open-end spinning frames, comprising a thread-guiding rod ( 22 ) which carries thread-guides ( 21 ), fixed and spaced apart with a span corresponding to a span of spinning stations ( 1 ), positioned on a series of guides ( 40 ) and driven in alternate movement to translate its thread-guides ( 21 ) in front of a bobbin being formed by the alternate motion of a driving means ( 41 ), wherein said driving means is a slider ( 41 , 80 ) of a linear electric motor, comprising a bar body ( 45 , 80 ) integral with it, positioned in an axial direction, said bar body ( 45 , 80 ) is obtained by connecting a plurality of permanent magnets ( 52 ) facing one another with their side faces, alternating the positive and negative (N) and (S) polarities on their upper and lower faces, which is moved in alternate translating motion by energizing a variable magnetic field produced in a stator ( 60 , 85 ) comprising a bar body ( 65 ) energized with windings ( 72 ) with electromagnetic spirals to provide it surface facing said slider ( 41 ) with a sequence of (N) and (S) polarities, or alternately positive or negative polarities which mover axially forward and backward so as to attract or repel the facing (N) and (S) polarities of the slider ( 41 ) to move the slider ( 41 ) according to the direction of the electric energizing current which is supplied in sequence to said windings ( 72 ) and which is controlled by a control unit (G) of said spinning frame.