Patent GB-600565-A (GB)
Title: Improvements in or relating to yarn or like winding machines
IPC: B65H54/22
Filed: 1944-11-08
Abstract: 600,565. Winding yarn &c. ABBEY, A. (Universal Winding Co.). Nov. 8, 1944, No. 21996. [Class 120(ii)] A yarn &c. winding machine of the type having packagesupporting means, driving means, preferably a driving drum, for rotating the package to wind on yarn from supply, end-finding means for finding an end of yarn prior to its being united to the yarn on the package and detector means for detecting breakage or exhaustion of the yarn, includes a composite structure comprising the end-finding means and a knotting means, the structure being controlled by the detector means to retrieve the yarn end and unite it automatically to the end of the yarn on the package, the composite structure being stationary in relation to the package-supporting means. Yarn y from a main supply bobbin s is led through a notch 240 in a guide plate 241, thence between tensioning discs 238, 239 and through a detection and reserve yarn supplying device 244, 288 to the opening of a slub-catcher 250. From the slub-catcher it is led under a guide wire 258 and beneath a bar 102 of a weighted yarn-breakage or exhaustion-detecting device 103. From this latter detector, the yarn is led by way of the traversing grooves 11, 12 of a package driving drum 10 to the cop tube C to which it is attached by any means, the tube C being carried by an arm 14 which may be swung upwardly away from the drum 10. A reserve yarn y<SP>1</SP>, to be used when the yarn y becomes exhausted, from a supply s<SP>1</SP>, is led over the limbs of a guide wire 263 and its end attached to a transfer arm 290 where it is held by a gripper 291, the end of the yarn y<SP>1</SP> being severed by a knife 295. The arm 290 is held in an inoperative position by a finger 283 on a shaft 280 engaging a detent on the arm 290, the amount of rotation of this shaft 280 being determined by fingers 288 which either grip the broken end lying on the top of the plate 244, or pass through gaps therein when the yarn y fails so to bring the reserve y<SP>1</SP> into position for connection to the package yarn. To begin a wind, a handle 206 is depressed to remove a detent pin 194 from an adjustable package measuring device 185 and allow the arm 14 to swing downwardly, under gravity, and the cop tube C to contact the drum 10. At the same time, an arm 134 on a member 122 is moved within the path of a stud 168 revolving with a shaft 65 to move a clutch-operating member 78 to remove a brake shoe 90 from the clutch member 22 and to engage the clutch 40 to cause the drum to be rotated from the drive shaft 16 at a relatively high speed. The turning of the member 122 about its carrying rod 110 moves an arm 115 to rock a member 107 so to swing the detector 103 downwardly and cause a bail-wire 272 connected thereto to engage the yarn y and draw it downwardly to take up slack therein (Fig. 3). The release of the handle 206 allows the arm 134 of the member 122 to engage a lug 138 on the clutch shifter 78 and the member 107 rocks to allow the detector 103 to engage the strand y and the bail wire 272 to resume its inoperative position. When a slub wedges between the plates 247, 248 of the slub catcher 250, the yarn y is broken. The detector 103 then swings upwardly under the weight 112 and the member 107 is rocked to position the wedge-shaped head 120 of an arm 116 on the member 107 against a collar 68 and sleeve 74 rotating with the drive shaft 65. Abutments 70, 75 on the members 68, 74 then co-operate with the arm 116 to move the clutch shifter 78 to disengage the clutch members 22, 40 and so disconnect the drive from the shaft 16 to the drum 10. At the same time, the member 107 is moved and, through the arm 115, moves the member 122, the brake shoe 90 being applied to the clutch member 22 to bring the drum 10 to rest. Continued movement of the sleeve 74 brings a rotating member 85 thereon into driving contact with the clutch member 22, to rotate the drum 10 in the reverse direction so that the package P is rotated in an unwinding sense, the brake shoe 90 having been released by a co-operating stud and cam-like slot. As the shaft 65 continues its rotation a lug 153 on the collar 68 thereon contacts the arm 116 to tilt the frame 107 backwardly to be held in that position by a latch 158 engaging a finger 111 thereon. The abutment 75 also contacts the arm of a bellcrank lever 435 which is rocked and through a link 438 swings a valve member to open suction to a hose 355 leading to the end-finding tube 325 and nozzle 326, the valve being maintained open by a detent 445. The end-finding tube 325, which also removes lint and dust from the slubcatcher &c., is attached to a carriage 328 connectable, when the yarn ends are to be retrieved, to a shaft 329 reciprocated longitudinally and oscillated about its axis by cam grooves 342. 346 cut in the periphery and end face of a rotating drum 335. With the movement of the clutch-shifter 78 a cam cage 389 thereon moves a detent 383 to permit a spring-urged latching-pin 370 on the carriage 328 to enter a recess in the shaft 329 to connect the carriage 328 thereto and so partake of its motions. The end finder 325, in its movement to the left (Fig. 2) first locates a pinion 357 thereon opposite a rack bar 367. The shaft 329 is then oscillated to bring the rack and pinion into mesh and further movement of the carriage 328 then rotates the endfinder 325 to a position adjacent the slubcatcher 250. This rotation of the endfinder brings an ear 501 on the suction nozzle 326 to rock a detent lever allowing the shaft 280 to rotate and bring the detector fingers 288 to engage the yarn end lying on the plate 244. Further rotation of the end finder 325 brings the nozzle 326 into contact with a re-setting mechanism to raise the fingers 288 above the yarn y and at the same time, through a hooked member 319 to lift the upper tension disc 238 away from the lower disc 239, and relieve the tension in the yarn. Simultaneously the re-setting frame rocks the upper blade 247 of the slub-catcher 250 to enable the nozzle 326 to withdraw the yarn end therefrom, an arm 315 on the frame moving upwardly to contact the yarn y and bring it towards the nozzle. The cam grooves 342, 346 now reverse the operation of the carriage 328 to bring the end-finder 325 back to its starting position but carrying the yarn end from the slubcatcher with it. During this motion the nozzle 326 is rotated towards and drawn along the surface of the package P, which it engages resiliently at all diameters by reason of the flexible armouring of the hose 325, so that it retrieves also the broken end at the package; the slubcatching blade 247 and the upper tension disc 238 being returned to their. operative positions. The end-finder 325, carrying the two yarn ends, is now moved across the length of the package towards a knotter 296 and, during this movement, the clutch shifter 78 is slid to disengage the clutch members 22, 85 and apply the brake shoe 90 to bring to an end the unwinding rotation of the package. As the nozzle 326 approaches the knotter 396, it engages a pivoted spring - urged "anti - stitch" member 467, which, upon the nozzle 326 being swung away from the package P, pivots back and engages the yarn y to prevent " stitches " being drawn over the end of the package. The nozzle 326 now moves beyond the knotter 396 and draws the two yarn ends between tension plates on the knotter. An abutment on the carriage 328 now engages a gear segment 400 to initiate the operation of the knotter and the latching pin 370 is partly withdrawn to uncouple the carriage 328 from its operating shaft 329 so far as longitudinal motion is concerned. The nozzle 326 is now rocked, the yarn ends knotted and the projecting ends severed. The shaft 329 is now moved towards the right (Fig. 2), the catch pin 370 is again projected into the shaft 329, the carriage 328 and nozzle 326 moving therewith, and the knotter is re-set. Suction to the nozzle 326 is now cut off. Further motion towards . the right moves the yarn y, by engagement therewith of a hook 480 on the carriage 328, towards the centre of the traverse drum 10 so that it may be picked up later by the grooves 11, 12. The clutch shifter 78 is now operated to re-engage the clutch members 22, 40 and remove the brake shoe 90 to permit normal winding to beginagain. The detector 103 is now moved raising the bail 272 to engage the yarn y to take up slack therein and cause it to slide under the yarn guide wire and between the blades 247, 248 of the slubcatcher. The hook 480 is then moved to release the yarn and the latch pin 370 is withdrawn to uncouple the carriage 328 from its driving shaft 329. Upon failure of the yarn y, the detector 103 moves, as above described, to cause the end-finder 325 to swing towards the slub-catcher 250 and the shaft 280 is unlatched to allow the detector fingers 288 to move towards the plate 244 and, since there is no yarn end thereon, the fingers 288 will pass through gaps in the plate. The frame 285 is thus released and the reserve strand y<SP>1</SP> will be dropped into a position where it can be picked up by the nozzle 326 and knotted, as above described, to the package yarn, the reserve holding arm 290 being returned to its original position. The exhausted supply bobbin s is then replaced manually by a fresh supply. Winding continues until the adjustable sizing-member 185 rides off the knock-off member 190 which then rocks to cause its end to engage the abutments 69, 75, to move the clutch shifter 78 to disengage the clutch members 22, 40 and apply the brake shoe 90 to assist winding, the wound package still resting on the driving and traversing drum 10. Doffing is then effected manually. In a multiple unit machine, the above mechanisms are repeated for each unit except that a single reciprocating and oscillating shaft 329 moved by a single cam 335, grooved at 342, 346, actuates the mechanisms of each unit. Specificatio