Patent GB-969776-A (GB)
Title: Improvements in automatic supply package indexing mechanisms for winding machines
IPC: B65H63/02
Filed: 1961-05-18
Abstract: 969, 776. Winding yarns; package supply; yarn sensing; thread guides; tension arrangements; waxing yarn. LEESONA CORPORATION. May 18, 1961 [May 19, 1960], No. 18219/61. Headings D1D, D1F and D1J. In a yarn winding machine having means for detecting any interruption in the flow of yarn from a yarn supply package S1, Fig. 1, actuation of said means causes a platform 48 to remove the supply package S1 from, and bring a new yarn supply package S2 into, the winding position provided said interruption is due to the exhaustion of the yarn on the supply package S1 or is due to a break in the yarn supply between the package S1 and a combined yarn sensing and tensioning device 262, 264. When the yarn supply to the winding station fails a yarn sensing lever 625, by swinging upwardly, causes a supply end-finding suction tube 155 to be swung downwardly and forwardly to seek out and engage the supply end of the broken yarn, after which the tube 155 conveys the broken yarn end to a knotter to be united with the end of the thread extending from the package being wound. The platform 48 is rotated by a tubular shaft 60 powered by a constantly rotating internal shaft 64 through an intervening semi-revolution clutch mounted above a plate 70. Operation of the semirevolution clutch is initiated by a clutch,actuating member 186 that can be pivoted from an upper inoperative position shown in broken lines to a lower operative position shown in full lines each time the thread sensing lever 625 is operated. The clutch actuating member 186 is associated with a latching device 150 that can be displaced along the axis about which the member 186 pivots to cause the clutch actuating member to slide away from or to slide into operative engagement with the semirevolution clutch. If yarn is present in the combined yarn sensing and tensioning device 262, 264, the presence of the yarn in this device prevents a pin 192 in the device from moving downwardly to a position in which it would cause the latching device 150 to slide into operative engagement with the semi-revolution clutch. Thus, if the yarn breaks between the combined sensing and tensioning device 262, 264, and the yarn package, the lever 625 will pivot upwardly and cause the clutch actuating member 186 to move to its lower operative position; this motion will not initiate movement of the semirevolution clutch, however, since the path of movement of the member 186 under these conditions is out of active engagement with the semi-revolution clutch. Should the yarn supply fail, however, or should the yarn break between the supply package S1 and the combined sensing and tensioning device 262, 264, the winding means will draw the yarn away from the combined sensing and tensioning device and the pin 192 will then drop down to a position in which path of movement of the clutch actuating member 186 is brought into active engagement with the semi-revolution clutch. The said upward movement of the thread breakage lever 625 then causes the clutch actuating member 186 to move downwardly and so initiate one movement of the semi-revolution clutch to turn the platform 48 such that the package S1 is moved out of, and a fresh supply package S2 is moved into, the winding position. Supply package support indexing clutch. A disc 82, Fig. 4, functions as the driven element of the clutch and is coupled to the tubular shaft 60. The driving element is constituted by a second disc 86 with a periphery composed of alternating notches 88 and projections or teeth 90, this disc 86 being keyed to the internal shaft 64. To enable the continually rotating notched disc 86 to be selectively coupled with or uncoupled from the disc 82, a flat V-shaped member 98 is pivotally mounted, at its mid-point, to disc 82 by means of a stud 100 offset from the disc axis. The member 98 has projections 102 at its opposite ends that are adapted in turn to abut against a stop 118. When the stop 118 is removed a spring 106 turns the arm 98 anticlockwise about its stud 100 so that an upstanding lug 104 on the member 98 moves into one of the notches 88 on the disc 86. Since the disc 86 is continually rotating the disc 82 is now forced to rotate until the second of the projections 102 abuts against the stop 118 that has now moved back to its original position. When this occurs the member 98 is rocked clockwise about its stud 100 and the projection 104 is then swung out of the notch 88 and the drive between the disc 86 and the disc 82 is then terminated. The driven disc 82 includes opposed lugs 84 that also abut against the removable stop member 118 to ensure that the disc 82 is correctly located when the drive thereto is broken. The stop 118 is moved out of its operative position each time the clutch actuating member 186 is oscillated whilst in its operative position with respect to the semi-revolution clutch. Combined yarn sensing and tensioning device. The tensioning device comprises a lower disc 264, Fig. 18 and an upper disc 262 slidable upon a sleeve 246. The upper disc 262 may be weighted by a washer 277 to impose the desired amount of tension upon the moving strand when drawn between the discs 262 and 264. Within the sleeve 246 is a slidable plunger member 254 having a shoulder 258 beneath which the moving strand of yarn passes so as to hold the plunger 254 in an elevated position. When the plunger 254 is in its elevated position the pin 192 extending downwardly therefrom is in a position in which it does not cause the clutch actuating member 186 to slide along its pivotal axis into operative engagement with the semi-revolution clutch. Thus, should the yarn break after it has left the tensioning device, that portion of the yarn that is left in the tensioning device will hold the pin 192 in an elevated position and so prevent the semi-revolution clutch from being operated by the thread sensing lever 625. If the yarn supply fails, or is broken between the yarn supply package S1 and the tensioning device, the yarn will be drawn out from between the discs 262, 264, and the plunger 254 will then move downwardly and the pin 192 will then displace the clutch actuating member 186 into operative relationship with the semi-revolution clutch so that on operation of the clutch actuating member 186 by the thread sensing lever 625 the semi-revolution clutch will be set in operation. Slub catcher. This consists of a slub-engaging blade 322 Fig. 24, and a guide blade 324 mounted in spaced apart relationship in the direction of thread movement, the lower edge of blade 322 being spaced very slightly from the top surface of the winding machine. The slub-catcher includes a downwardly projecting leg 332 that extends into the winding machine where it co-operates with means such that each time the yarn sensing lever 625 operates the slub catcher is swung upwardly about an end pivot so as to space the slub-engaging blade 322 away from its operative position. When a yarn end finding and knotting operation has been completed the slub catcher drops down automatically into its operative position. The slub catcher includes a knife blade 334 that is biased upwardly by a spring 338 but which can be rocked downwardly at will to place the knife blade in its operative position. Yarn waxing attachment. Between the yarn tensioning and sensing device and the slub catcher 320, Figs. 1 and 20 there is positioned a rotating cake of wax 426 beneath which the yarn passes, this cake of wax being rotated by a shaft 428 driven by belt and pulley means 434, 436 from the main drive shaft within the shaft 60. Reserve end holder and guide. The yarn end Y1, Fig. 20, extending from the reserve package S2, is carried up over a yarn guide 392 and deposited in a suction aperture 390. When the semi-revolution clutch is operated the platform 48 is rotated anticlockwise as viewed in Fig. 20 and the yarn end Y1 then slides along the yarn guide 392 until it drops into a yarn guide eye 396 in vertical alignment with the axis of the new position of the supply package. Clearing lints. A main suction channel 183. Fig. 1, is coupled to the suction orifice 390, Fig. 20, as well as to a elongated orifice 384 below the slub catcher 320 and to a further suction orifice 288, Fig. 18, below the tension disc 264. The purpose of the orifices 384 and 288 is to remove lint that may accumulate at the slub catcher and the tensioning device. Specifications 704,931, 969,774, 969,775, 969,778 and 969,779 are referred to.