Patent GB-459527-A (GB)
Title: Improvements in traverse or building mechanism for winding yarns or threads on bobbins or other bodies with bunch or like portions
IPC: D01H1/36
Filed: 1935-07-10
Abstract: 459,527. Bunch-building motion for spinning and like machines. AMBLER, Ltd., F., Dumb Mills, Frizinghall, and AMBLER G. H., Chellow Grange, both in Bradford, Yorkshire. July 10, 1935, Nos. 19672/35 and 18096/36. [Class 120 (ii)] A building-motion for winding yarns or threads on to bobbins with bunch or like portions comprises, Figs. 1, 3, 7 and 9, a main cam s for winding the bobbin, an auxiliary cam v for winding the bunch, and a toothed wheel u mounted to revolve together on a shaft r and, respectively, to operate followers 3, 8, and a mutilated toothed cam 1 on a lever w, so that the follower 8 is initially operative to wind the bunch, then the follower 3 is brought into operation, the follower 8 remaining inoperative, spring- means, stressed by the toothed wheel and cam, returning the parts to their initial position when the bobbin is fully wound. The invention is described in connection with a Scaife motion for a ring spinning-machine, the shaft r being the usual cam shaft and the lever w operating the slide rail through the lever 19. Initially the cam v engages the follower 8 and oscillates the lever w to wind the bunch and at the same time, rotates the follower, thus effecting the engagement of the wheel u with the effective part of the mutilated toothed cam 1, which is thereupon rotated and the follower 3 carried into contact with the main cam s. The follower 8 is mounted loosely on a shaft x, and the follower 3 is carried on axles in the cam 1 and a plate z, which are both fixed on the shaft x. A torsion spring y is connected to the shaft and anchored to the lever so as to effect the return of the cam 1 and plate z, with the follower 3, to their initial position after operation. The follower 8 is provided with a tooth 10 and a locking-surface 11 adapted to co-operate with a pivoted plate 12 to release a catch 5 at the end of the winding of the bunch, whereby the toothed cam 1 may be moved into contact with the wheel u. The plate 12 bears against an adjustable stop 17 so that, according to the required length of yarn in the bunch, one or other of the concave surfaces 14<a> .. 14d are initially in contact with the locking-surface 11 and the tooth 10 against the rear edge of one of the intervening notches 13a, 13b, 13<c>. Rotation of the follower 8 causes the tooth to engage in successive rotations with the notches, whereby the plate is moved so that a finger 16 ultimately raises the catch 5 from the plate z, whereupon a spring 9, connected to the follower 8 and to the shaft x and wound up by the rotation of the follower, turns the shaft x so that the cam 1 is engaged by the wheel u. The shaft x is thereby rotated so that the cam 1 and plate z carry the follower 3 along slots w<3>, w<4> in the lever wand deposit it upon shelfs 4 where it is engaged by the cam s and normal building proceeds. The engagement of the cam and wheel u also causes the follower 8 to be removed from the cam v, so that it is returned by the spring 9 to its initial position. In the arrangement shown in Figs. 11 and 12, the main follower 29, which is of polygonal form, is carried in slots in a toothed cam 26 and a wheel 27 fast on a shaft 24, and the auxiliary follower 54 is adapted to be removed from the auxiliary cam by fingers 48, 49 on rotary discs 45, 46 when the bunch is fully wound. The initial position of the discs 45, 46 is determined by the engagement, under the influence of a torsion spring 62, of a stop 51 on the disc 45 with a stop 61 on a disc 58, which is adjustable by means of a detent 64 adapted to engage one or other of holes 59 in the disc. The holes 59 are numbered to indicate the length of the bunch corresponding to each adjustment. Initially the trunnions of the follower 54 rotate the discs 45, 46 until a long tooth on a wheel 52 fast on the disc 46 engages a mutilated wheel 35 on the shaft 24 and brings it into gear with the wheel 52. The shaft 24 is thereupon rotated and the toothed cam 26 brought into gear with the wheel u on the cam shaft, the discs 45, 46 meanwhile having lifted the follower 54 from its bearings so that it rolls down the slot 50, and the toothed cam 26 and wheel 27 having raised the main follower 29. Further rotation of the shaft 24 by the wheel stresses the return spring 25, and the cam 26 and wheel 27 carry the follower 29 so that it falls into position for engagement with the main cam s, assisted by a spring 33 on a wheel rotated by the wheel 27. In a further modification shown in Figs. 19, 20, a toothed cam 26* and wheel 27* on a shaft 24<1> provided with a spring 25<1> operate in a similar manner to that previously described to carry the main follower 29<1> into contact with the main cam. The auxiliary follower 79 is adapted to be locked by a gate 80 during the winding of the bunch and to be free to roll in tracks 67 formed bv blocks 66, 69 bolted to the cam lever w<1>. The shaft 24<1> is coupled by a chain 87, provided with a spring 90 to prevent snatch, with a sprocket wheel 88 connected to a measuring-mechanism adapted to turn it at a determined time. A finger 85 on the shaft 241 supports the gate 80 and confines the trunnions of the follower at the initial stage. Subsequent movement of the shaft 24<1>, determined by the measuring-mechanism brings the cam 26 into gear with the wheel u and the follower 29<1> into contact with the main cam. The easing of the pressure on the follower 79 consequent upon the engagement of cam 26* enables the gate 80 to be withdrawn by a spring 82 until it is raised by the finger 85 when the parts are reset by the recoil of the spring 251.