Improvements in and relating to the rollers of spinning, twisting and like machines for collecting broken ends and guiding the yarn

摘要

372,073. Waste-collecting and yarngrinding rollers in spinning and like frames. TOURON, A. NAU-, 4, Allee de la Gare, Le Vesinet, Seine-et-Oise, France. April 17, 1931, No. 11470. Convention date, April 19, 1930. [Class 120 (ii).] A roving collecting device for continuous spinning machines comprises a free roving collector juxtaposed to the thread passing from the drawing rollers to the spindle, and a driving roller for the roving collector, disposed on the opposite side of the thread, the collector having a collecting face, for the broken end of a thread, removed from the driving roller sufficiently to permit free passage of an unbroken thread between said face and the driving roller. A solid or hollow rotary roller 1 is adjustably mounted, preferably in ball bearings in cavities 7 at the ends of pivoted arms 6, to serve a desired number of spindles. These arms are hinged about a shaft 8 and counterbalanced by weights 10 carried at the end of extensions 9. The shaft 8 extends the whole length of the machine and is driven by gearing 11 .. 14 and a change pinion 15 from the delivery roller 3 and drives the rollers 1 by means of a belt 1'7. Stops are provided to keep the roller 1 out of contact with the delivery roller. Located along the roller 1 are roving collecting rollers preferably of wood which comprise cylindrical portions 23 connected by a shaft 21, and conical portions 24 or cylindrical portions of smaller diameter than the portion 23. The portions 24 are preferably covered with green baize so that when a thread which normally passes between the robler 1 and the portion 24 breaks they will easily pick up the broken end. The portions 23 may also be covered with baize or rubber to give a high coefficient of friction between them and the roller 1. The shaft 21 of the roving collector is supported on inclined runners 26 on a small saddle 25 and inclines 28 on the runners 26 lead into notches 27 into which the roving collectors may be pushed when piecing up broken threads. The saddle 25 may be mounted on a bar 30 which by means of end supports 31 and guides 32, 33 may be moved up inclined supports 34 secured to the arms 6 so that the roving collector may be brought to rest in notches 35 when an empty bobbin is being substituted for a full one. Stops 34a facilitate the fall of the guide 33 into the stops 35. During this raising operation the roving collector may fall into the notches 27 or into stop notches 37 according to the magnitude of the angles alpha and #. In either case it is easily returned to operative position. If desired the support 25 may be hingedly supported on the bar 30, friction washers being provided to hold the support 25 in a desired position and a stop to contact with a fixed part of the hinge to limit the upper position of the saddle. The drive of the roving collecting roller may be magnetic either the driving roller 1 or the collecting roller being magnetized. The roller 1 may also be heated either by hot air, hot water, steam or electricity and may be perforated. For replacement of the pressure rollers 2 the driving roller 1 is swung out of the way about the pivot 8 or if desired the pressure roller 2 may be in front of the driving roller 3 in which case the arms 6 need not be pivoted and the driving roller 1 may extend the whole length of the machine. The roller 1 need not be positively driven but may be driven merely by the passage of the thread.