Patent GB-777480-A (GB)
Title: Improvements in textile yarn spinning machines
Inventor: WARD KENNETH
IPC: D01H1/36
Filed: 1954-09-10
Abstract: 777,480. Building motions for spinning machines. FAIRBAIRN LAWSON COMBE BARBOUR, Ltd. Aug. 11, 1955 [Sept. 10, 1954], No. 26223/54. Class 120 (2). A textile yarn spinning machine including a building or traversing motion of the two-lever type for imparting an oscillating motion to part of a yarn winding portion of the machine, has means for varying the amplitude and mean position of the traversing motion, comprising a shaft rotated step by step during the oscillating motion of one of the levers this shaft acting upon mean position varying means and being connectible to amplitude varying means. In the arrangement shown the building motion mechanism consists of a first lever 1 pivoted at 2 and having a roller 3 in contact with a heart shaped cam 4 which is fixed to a shaft 5 driven at constant rate by worm wheel 6 and worm 7. A second lever 10, pivoted at 11 co-operates with the first lever through a roller 12 and a roller support 13 which carries a horizontal internal thread running on a screw 14 formed on a shaft 15. Rotation of the shaft 15 moves the roller 12 over the co-operating surface of lever 1 so as to vary the angle of motion imparted to the lever 10 by the lever 1. A chain drum 17 is carried by lever 10 and a chain 19 extends from this drum to a double pulley 20 which carries a further chain 21 which is connected to and imparts sliding vertical motion to the ring rail of a ring spinning frame. The drum 17 is provided with a worm wheel 43 driven by a worm 22 fixed to a hollow shaft 23 through which the shaft 15 passes and the shaft 23 has a ratchet wheel 36 fixed to it the ratchet wheel being operated by a ratchet pawl 25 carried by a rocking member 37 (not shown) and arranged such that the angular movement of the lever 10 causes the ratchet to rotate the wheel 36 and hence the drum 17. The shaft 15 carries a collar 27 provided with dogs 28, 29 at each end which are engageable either with further dogs 30 provided on the shaft 23 or with dogs 31 provided on a collar 32 fixed to the shaft 15. The collar 27 can also be slid to a central position in which all the dogs are in engagement and a handle 33 can be placed on the collar 27 for adjustment purposes. In operation, to build a normal bobbin winding the collar is located as shown and the shaft 15 rotated so as to bring the roller 12 to such a position on the lever 1 as to give the required amplitude of movement to the ring rail via the chain 21. The pawl 25 is removed from contact with the ratchet and wheel 36 and the shaft 15 is locked in the bearing 16. If a cop type winding is required the position of the roller 12 is set as above to give the required transverse the pawl 25 is dropped on to the ratchet wheel 36 and the dogs 28 and 30 are put into engagement whilst dogs 31 and 29 are disengaged. Oscillation of the lever 10 then drives the ratchet wheel 36, turns the hollow shaft 23 and the worm 22, and causes the worm wheel 17 to rotate slowly and wind-up the chain 19 this causing the mean position of the transverse to rise slowly. For a rove build the roller 12 is set as before and the collar 27 is moved into its central position such that all the dogs are in engagement. Operation of the machine then causes rotation of the ratchet wheel 36 and this revolves both the shafts 15 and 23 so that the traverse is diminished and its mean position raised simultaneously. The arrangement can of course be equally well applied to the traversing of the spindle rail of a machine. Specification 768,376 is referred to.