Patent GB-684360-A (GB)
Title: Improvements relating to building motions for textile machines
Inventor: GOODWIN LESLIE CHARLES
IPC: D01H1/36
Filed: 1950-09-27
Abstract: 684,360. Building motions. HARBENS, Ltd. March 20, 1951 [Sept. 27, 1950], No. 23654/50. Class 120(ii) [Also in Group XXVI] A building motion for the ring rail of a textile ring spinning machine has the ring rail reciprocated by a reversing vane type hydraulic motor, the rotor of which is axially in line with and directly turns a shaft carrying pinions by means of which racks for traversing the ring rail are operated. Arrangements consisting of pawl and ratchet devices, are provided for varying the length of traverse of the ring rail to produce packages having one or both ends conical. As shown, Fig. 1, the ring rail a is raised and lowered by pinions c meshing with racks d. The pinion shaft e is oscillated by the reversing vane type hydraulic motor f; g is an oil tank from which oil is drawn by a pump h and delivered under pressure through safety valve i and filter j to a reversing valve k. The vane m, Fig. 4, of the hydraulic motor is secured to the shaft e and is oscillated by hydraulic pressure pressing upon and exhausting from its opposite sides through the abutment p having a central exhaust port q and two ports v and s which can be put into communication either with exhaust or with the hydraulic fluid supply under the control of a valve t, Fig. 6. The valve arrangement serves to effect reversals of the vane m of the hydraulic motor and so oscillatory movements of the pinion shaft e. The arcuate movement of the vane m is varied to give the necessary variation in traverse of the ring rail a by mechanism shown in Figs. 3, 4, 5 and 8. The shaft 3 of valve t has a crank arm 4 having a pin 5 carrying a roller and projecting through a gap 10 in a fixed bridge piece 11 into the gap 6 of a rocking arm 7 journalled on a part 8 on the end cover of the vane motor. Arm 7 has a lug 9 in which are secured two stop pins 12 and 13 which serve to turn the crank arm 4 in one or other direction, to rotate the valve shaft 3 to reverse the valve t. The arm 7 can take up one or other of two extreme positions under the toggle action of springs 14 and 15. A plate 16 having a raised peripheral surface 17 and a depressed peripheral surface 18 is secured on a boss 19 rigid with shaft e and has a pin 20 projecting from it which pin in one direction of rotation of shaft e will engage the stop 12 and move the rocking arm 7 from one extreme position to the other. A ratchet wheel 21 is frictionally carried on the boss 19 and is engaged by pawls 22 and 23 on two arms 24 and 25 having a spring 26 between them tending to draw the arm 25 towards the arm 24. Pivotedly mounted on the ratchet wheel 21 are three arms 28, 29 and 30 having rollers at their outer ends which ride under the pressure of springs 31 on the peripheral edge of the plate 16. Each of these arms has an abutment 32. which, when the respective roller is on the depressed part 18 of plate 16 and the shaft e is rotating in the opposite direction to that referred to above, can engage the stop pin 13 to operate the reversing mechanism in the opposite direction to that effected by the pin 20. In operation, assuming the mechanism in the position shown in Fig. 3 and that arm 24 is moving anti-clockwise carrying arm 25 with it, the ratchet wheel 21 also being rotated anti-clockwise by friction, the arm 25 eventually engages an adjustable stop 33 and will hold the ratchet wheel 21. The arm 24 will continue to move until the pin 20 engages stop 12 and operates the reversing mechanism. On reversal of shaft e the pawl 22 on arm 24 engages the ratchet wheel 21, the spring 26 holds the arm 25 until the arm 24 contacts it and then they rotate together in the reverse direction until the projection 32 on arm 30 engages the stop pin 13 to again operate the reversing mechanism. With this arrangement the position of the ratchet wheel 21 in relation to the plate 16 is gradually progressed in a clockwise direction and consequently the point at which one of the arms 28, 29 or 30 effects the reversal of the mechanism in the opposite direction is also varied, producing a gradual variation in the length of traverse of the ring rail. With the arrangement shown this length of traverse is gradual reduced as, say, the arm 30 progresses along the depression 18 and then increases back to its maximum as this arm leaves the said depression at end 34 and is replaced at the other end by the next arm 29, the traverse then gradually decreasing again. Such an arrangement produces a package having a flat bottom end and a coned upper end. In a modification a different arrangement of ratchet pawls is provided to give a gradually increasing traverse up to a maximum and then a gradually decreasing traverse back to the original traverse. A further modification provides an arrangement whereby the length of traverse is kept constant but moves up and down in relation to the package being wound thus producing a package of double-conical-end form.