Patent GB-755996-A (GB)
Title: Improvements in a yarn winding machine
IPC: B65H54/26
Filed: 1954-04-21
Abstract: 755,996. Winding yarn. BARBER-COLMAN CO. April 21, 1954, No. 11496/54. Class 120 (2). A yarn-winding machine having a plurality of units for winding thread from a bobbin to form a cheese and a thread-uniting mechanism associated with the units successively and operable to unite the thread on a new bobbin to the cheese is characterized in that the cheese is mounted on a carrier for movement between a support forming part of a winding unit and which holds the cheese in winding position and a support forming part of the uniting mechanism and which holds the cheese in tying position, the cheese being transferred from the winding position to an inactive position by means activated by a thread responsive mechanism and being moved from the inactive position to the tying position by means operative in the approaching movement of the winding unit and the uniting mechanism. As shown, before starting-up the machine empty cores 46 for the cheeses, are placed between the arms 22, 23 of the cheese holders and supply bobbins b, bl are placed in the skewers 114, 115 in the yarnsupply holder. The skewers comprise radiallyexpansible fingers 135 controlled by a camoperated headed plunger 136. A number of wraps of yarn are wound on to each core 46 by hand, the yarn to each unit is broken and thread from the bobbin bl is placed in the yarn clamp G. The core 46, carried by the arms 22, 23, in turn carried by the arm 17, is lowered toward but not yet touching, the winding and traversing drum B, the ratchet pawl 125, Fig. 13, and disc 127 being in a position to turn the creel shaft 109, ready to advance bobbin bl to supply position. The arm 17 is held in the partly-raised position by the engagement of a pawl 41 with a ratchet 42, and in this position linkage 61, 62, 63 turns a spider carried on the core holder, to brake the core and prevent its turning. The drums B having been set in motion, the operative starts the travelling tender H, which is driven by a motor 15 and runs around a track 13, to tie up the cheeses and move them into contact with the drums B. If a yarn s breaks or exhausts during winding, the detector E moves to close a switch 71 and energize a solenoid 70 to disengage a latch 28 and release the carrier-arm 17 to be moved by its spring 29 into the intermediate or braking position, Fig. 6. When the traveller H reaches the cheese in such position, a plough 105 on the traveller passes a bell-crank 65 to release the brake lever 63, the pawl 41 also being disengaged by a plough 107 which contacts the pawl-carrying lever 43. The cheese then drops on to the end-finding roll 104 on the traveller and is rotated thereby. The movement of the arm 17 through a one-way motion device 111  moves the supply creel C through 180 degrees and brings the supply bobbin b<SP>1</SP> into supply position. At the same time a disc 157 carries the reserve thread s<SP>1</SP> along a guide surface 158a into supply position. With the indexing of the creel, a cam 113 turns the shaft 162 so that the lever 163 rocks shafts 74 and 78 to open the thread-clearer D and detector E for the passage therethrough of the thread s<SP>1</SP>. As the indexing is completed, a follower 161 restores the elements D and E to their active positions, and the clamp G and thread-guiding arm 194 are moved outwardly to position the yarn s<SP>1</SP>   in the path of the traveller H where it is seized by the knotter I and united to the end on the cheese formed by the roll 104 and carried down by an arm 191 on the traveller. The plough 217 on the traveller now acts on the lever 218 of a segment 30 to restore the cheese-carrying arms to winding position and to be held therein by the latch 28. A bar 70b on the traveller H holds a switch 70a open to interrupt the circuit to the solenoid 70 so to allow the cheese to attain sufficient speed to tension the yarn without bringing about another operation of the solenoid before the traveller has passed the winding unit. As the carrier 17 returns to winding position, a link 186 draws the clamp G back from the path of the traveller H and the one-way drive 111 idles to allow the creel to remain stationary with the bobbin b<SP>1</SP> in active supply. The bobbin b from which the yarn had become exhausted is now replaced by hand, and if it had been a broken yarn therefrom that had caused the indexing movement, the end is placed in the clamp G to become the reserve end. When the cheese attains a predetermined size a switch 72, operated by an arm 86, is closed to energize the solenoid 70 to bring about the sequence of operations above described. The arm 86 is adjustable by a cam 102 and follower 101 so that the " full-size " at which knock-off occurs may be varied. The unbroken yarn running to a full cheese standing in the intermediate position indicates to the operative that doffing is necessary. He then breaks the yarn from bobbin b, now in reserve position, places the new supply end from b<SP>1</SP>in the clamp G, doffs the full cheese, places a new core in the holder, winds a number of yarn wraps thereon and awaits the automatic tying of the yarn ends by the traveller in due course. A modified form of machine is described with reference to Figs. 22-34 (not shown), in which the electrical control of the cheese carrier, of the first modification, is replaced by a mechanical control. In this form, the full-size detector is arranged to operate to break the yarn, so that yarn breakage (or exhaustion) conditions the removal of the cheese to braking position in all cases. This form of machine also includes a visual signal which indicates to the attendant when the cheese which has been moved to the braking position is a full one. The yarn clamp G, in this modification is advanced along a straight line into the path of the traveller and not swung into it, as previously described. The first modification may be fitted with a yarn-breaking device, following a " full-cheese " condition, each device being operated by a solenoid 346 (not shown) arranged in lines with the solenoid 70. The bell-crank 65 may be fitted with a long handle 230 to enable the operative to move it manually, as required. Whilst winding is being effected, the arm 23 is retained in core-retaining position by the engagement of a roller 222 with a track 224 furnished with a doffing recess 225 (not shown). The supply bobbins are separated by arcuate plates 150, 151, and the outside of the holder is bounded by a fixed plate 152 so that suction may be applied to remove dirt &c. at 154.