Patent GB-413560-A (GB)
Title: Improvements in or relating to yarn or like winding machines
IPC: B65H54/38
Filed: 1933-12-01
Abstract: 413,560. Yarn or like winding machines. UNIVERSAL WINDING CO., 95, South Street, Boston, U.S.A. Dec. 1, 1933, No. 33833. Convention date, Feb. 14. [Class 120 (ii).] In a yarn-winding machine having means to prevent ribbon winding an intermittently operated braking device is provided so as to retard periodically the speed of either the yarn traversing device or the rotatable package support so as to disrupt the synchronism between the rotation of the package and the traverse of the yarn. In a drum winding machine the ribbon breaking means are arranged periodically to retard the rotation of the package so as to cause slippage to occur between the package and the driving drum while the package is maintained in contact therewith along its whole length. The mechanism shown comprises a cop-holder 5 and drive roll 6, Fig. 1, having helical traverse grooves 7, 8, Fig. 3, as described in Specification 339,679, [Class 120 (ii)], the cop tube C being secured on the holder 5 by means of a flexible rubber ring 12 seated in a V-groove 13, Fig. 9, as described in Specification 414,782, and the braking device to prevent ribbon winding comprising a brake shoe 52 secured on the cranked forward end 51 of the operating rod 50. The cop holder 5 is journalled on a dead spindle 15 carried between a fork 17 at the end of a swinging arm 16 which is constructed of a tubular member 21 and a swivelled section 37, formed with the fork 17, rotatable therein. The member 21 is formed with a depending elbow-shaped arm 22 having aligned hubs 23, 24 pivoted on a stud shaft 25 about which the member 21 may rock against the frictional resistance of a collar 29 engaging a spring washer 31. An arm 35 is arranged to project downwardly from the hub 24 and is pivotally connected to the stop-rod 36, while a rocker arm 40 projecting downwardly from the rod section 37 carries a follower block 44 slidable in an inclined cam groove 45 formed in a quadrant 46 and serves to tilt the cone holder 5 away from the drive roll 6 as the package grows as described in Specification 275,543, [Class 120 (ii)]. A collar 56 and a hub 59 are secured on the brake rod 50 respectively abutting against the end of the rod section 37 and against the rearward end of the bearing member 21 the hub 59 being loose on the rod 50 and formed with an elbow shaped rocker arm or lever 60 for rocking the brake rod 50. The arm 60 is formed with a forked bearing 61 supporting a pin 62 on which is mounted a roller 63 while a spring 65 is secured to an ear 64 on the arm 60 and to an ear 90 on the lower arm of a bell-crank lever 71. A collar 66 abutting against the outer face of the hub 59 is secured on the rod 50 and is formed with a finger 68 overhanging the hub 59, Fig. 5, set screws 69 being mounted in the finger 68 and bearing against a flat on the hub 59 to alter the angular setting of the hub and therefore the relationship of the cam roller 63 and the brake shoe 52. A cam 70, provided with an upper arcuate face 75, is formed on the end of a hub or post 76 having a bearing stud 77 mounted in a hub 78 at the upper end of a bell-crank lever 71 which is bifurcated at 72 and provided with two spaced hubs 73, 74 pivotally mounted on the stud shaft 25. To vary the angular adjustment of the cam 70 screws 80 are provided in a boss 81 on the hub 78 to engage the flat bottom of a slot 79 cut through the centre of the stud 77. The lever 71 is slowly oscillated from any suitable moving part, e.g. by means of an eccentric 85 on a shaft 86 forming part of the stop-motion; the cam 70 being oscillated with a slow to-and-fro motion as indicated by the full and dash lines Figs. 6 and 7. When the arm 16 is in its lowermost position the upper arm of the bell crank lever 71 is in its rearward position and the roll 63 engages the face 75 of the cam 70 at the forward end, Fig. 6, the roller 63 being elevated to rock the arm 60 upwardly and release the brake shoe 52, Fig. 9. As winding proceeds the upper arm of the bell crank lever 71 is moved forward the roller 63 is lowered by the spring 65 and the rod 50 rocked to apply the brake shoe to the surface 14. This alternate application and removal of the braking force continues throughout the winding operation. As the package grows the arm 16 is swung upwardly about the stud shaft 25 and the roller 63 is displaced rearwardly along the cam 70, but as the cam face 75 is eccentrically disposed relatively to the axis of the lever 71 to the rise and fall of the roller 63 continues. The tilting of the cop holder 5 as the package grows tends to cause the surface 14 to recede from the shoe 52. This is also compensated for by the eccentric shape of the cam 70. The arrangement also provides for a progressively longer dwell of the brake shoe 52 on the surface 14 as the winding proceeds and the package possesses a greater momentum.