Patent GB-370133-A (GB)
Title: Improvements in mule spinning and twisting machines
IPC: D01H3/00
Filed: 1931-02-24
Abstract: 370,133. Mules. BURKARD, P., 48, Rue des Vosges, Roubaix, TAINE, R., 51, Rue du Boulevard, Marcq, Bareeul, both in Nord, and CONSTRUCTION DE MACHINES CIDEVANT F. J. GRœN, Lure, Haute-Sa÷ne, both in France. Feb. 24, 1931, No. 5728. Convention date, March 1, 1930. [Class 120 (ii).] In a mule the tin-roller shaft, the drawing rollers and the back shaft are driven by a continuously-rotating driving-shaft 20, Fig. 4, the tin-roller shaft A being driven by a grooved pulley 1, Fig. 1, loosely mounted thereon and comprising a friction clutch for driving the shaft A direct and a differential clutch mechanism for the reverse drive, the rollers and back shaft being driven by an adjustable and progressively operating friction clutch. The sleeve 3 of the friction clutch is secured to the grooved pulley 1 by screws 2, and when the members 3, 4 are engaged drives the shaft A through lugs 9 on the sleeve 4 engaging a spider 7 fixed on the boss of a pinion 8 keyed to the shaft A. The pulley also forms a gear-case provided with two symmetrically-disposed spindles 10 having broad pinions 11 freely rotatable thereon and simultaneously meshing with the fixed pinion 8 and a pinion 12 free on the shaft A and fixed to a brake pulley 13. On the outward run the clutch 3, 4 is engaged and the shaft A driven directly. During backing-off the clutch 3, 4 is disengaged and the brake pulley 13 locked the pinions 11 rotating on the pinion 12 and driving the pinion 8 in the reverse direction according to the ratio N-n/n, N and n being the numbers of teeth in the wheels 12 and 8 respectively. During winding-on the clutch 3, 4 is disengaged and the brake pulley 13 released, the gear-box rotating idly on the shaft A. The continuously-rotating driving-shaft 20, Fig. 4, drives a pinion 21 fixed on the cross-shaft 22 which, through bevel-wheels 45, 46 and a clutch 47, drives the drawing rollers 23, the back shaft being driven through a gear wheel 48. A friction clutch is provided on the shaft 22, comprising sleeves 25, 26, and controlled by a lever 27, Fig. 6, pivoted to a shaft 28 and joined by an arm 30 to a lever 31 pivoted at 32 and carrying a roller 33 bearing on a cam 34, a spring 29 tending to keep the parts 25, 26 engaged. The cam 34 is arranged to maintain the members 25, 26 separated during the inward run and to permit the spring 29 to engage the clutch for the outward run. The lever 27 acts indirectly on the engaging collar 37 through the spring 36 and is extended beyond its pivot 28 by an arm 27<1> carrying a catch-pin 38 engaging with the thread of a tapering screw 39. Rotation of the screw 39 allows the pin 38 to move to the right, Fig. 6, and thus permits the lever 27 to rotate and transmit to the spring 36 an increasing proportion of the action of the spring 29 until the pin 38 is clear of the screw 39 and the whole force is transmitted to spring 36 and sleeve 25. At this moment an adjustable stop on the lever 27 bears directly on the collar 37. On disengagement of the clutch the pin 38 reverts to its original position under gravity. Specifications 13450/13, [Class 78 (v), Winding and paying-out apparatus &c.], and 162,629, [Class 120 (ii), Spinning, twisting &c.], are referred to.