Patent GB-563613-A (GB)
Title: Improvements relating to machines for winding yarn
IPC: H01R13/68
Filed: 1943-05-10
Abstract: 563,613. Winding yarn. MACKIE & SONS, Ltd., J., and MACKIE, J. P. May 10, 1943, Nos. 7403/43 and 4671/44. [Class 120 (ii)] In a yarn winding machine the yarn is traversed in one direction only by a roller having a single non-intersecting helical groove or from an intermediate point to opposite ends of the roller by two non-intersecting helical grooves and the return travel of the yarn from the leaving end of the groove back to its starting point or to the entering end of an oppositely directed groove respectively is controlled by a stationary guide eye and a shaped plate or bar extending lengthwise of the grooved roller and positioned in front thereof. As shown in Fig. 3, a cylindrical package 31 is wound by contact with the roller 29 having two non-intersecting grooves 34, 35 which traverse the yarn from the middle of the roller to the ends thereof, the traverse from each end towards the middle of the roller, where the yarn enters the end 36 of the groove 34 or the end 37 of the groove 35, being controlled by the stationary guide eye 24 and the plate 28 over the shaped edge of which the yarn passes. In the traverse from the starting end 37 of the groove 35 to the return end 39, the yarn is retarded by the outward curve of the plate and when. the return traverse commences under the pull from the eye 24, it is facilitated by the move of the plate until it reaches the dip 43 when the yarn falls into the starting end 36 of the groove 34 by which it is traversed, while retarded by the curve of the plate, to the end 38 where it leaves the groove and is pulled back again by the guide eye, the traverse in this direction being again facilitated by the plate. The splayed ends 36, 37 of the grooves overlap and the position of the guide eye 24 and of the dip 43 in the plate are such to ensure the entry of the yarn into such splayed ends of the grooves ; the ends 36, 37 may be in line and the guide eye, dip in the plate and ends 36, 37 all in approximately the same plane at right angles to the axes of the grooved roller ; the starting ends of the grooves need not be in the middle of the roller but may be nearer one end thereof than the other with the dip in the plate correspondingly positioned. When winding a tapered package, the pitch of the grooves in the roller increases towards the smaller end of the package being wound. When the roller has a single helical groove, Fig. 12, the guide eye 82 is displaced towards one end of the roller and the shaped plate 83 has a single bulge with a dip 84 further displaced towards that end of the roller and when a tapered package is to be wound the groove 81 in the roller increases in pitch towards the smaller end of the package ; the roller of varying pitch may be used to wind a cylindrical package by shaping the plate with a bulge towards the end of the roller having the greatest pitch. ' In another arrangement, Fig. 18, in which the roller has two grooves 94, 95 of unequal lengths with overlapping starting ends, the guide eye 92 is displaced towards the end of the roller having the shorter groove 95 and the plate has a shoulder 97 for returning the yarn to the starting end of the groove 94. In a further form in which the roller has a single helical groove with the guide eye positioned in line with the middle of the roller, the plate is shaped with a single curve controlling the return traverse of the yarn. Specifications 529,150 and 563,614 are referred to.