Patent GB-520038-A (GB)
Title: Improvements in or relating to yarn or like winding machines
Inventor: REYNOLDS CHARLES D
IPC: B65H54/14
Filed: 1938-10-11
Abstract: 520,038. Winding yarns &c. UNIVERSAL WINDING CO. Oct. 11, 1938, No. 29455. Convention date, Sept. 21. [Class 120 (ii)] A yarn or like winding machine in which the package being wound is supported by a rotatable winding spindle and the yarn &c. is traversed longitudinally of the spindle by relative reciprocation, has package - releasing means between which and the winding spindle relative movement can take place to disengage the package from the spindle, the relative movement being directly caused by electromagnetic means ; the electromagnetic means may be actuated by the running yarn at the completion of a wound package and the packagereleasing means may serve to couple the package rotatively to the winding spindle and be carried by one of a pair of coaxial spindles spaced apart and between which the package is supported. As shown the machine comprises a number of winding spindles arranged in pairs and the doffling &c. devices are actuated when one or both of the packages on a pair of spindles are completed, the spindles 9, 10, Figs. 2 and 3, being driven by worm gearing from the shaft 6 through clutches 26 and the traverse cams 70, which are mounted on sleeves on the spindle shafts, by worm gearing from the shaft 5 through clutches 77. The traverse'rods 90 are connected by adjustable links to arms 85 rocked by the cams 70 and comprise jointed eccentrically threaded parts 130, Fig. 27, provided with the usual progression wheel 140, thread guide 136 and former 145 for forming the base of the package. The bobbin b is held between a rotatable cup 95 mounted on the winding spindle 9 and a rotatable cup 105 mounted in the machine frame, the cup 95 being slidable on the head 15 of the spindle, Fig. 4, for doffing the completed bobbin and securing a fresh bobbin between the cups ; the head 117 of the cup forms the armature of a solenoid 115 and is pressed forward to hold the bobbin by a spring 101. The yarn y from the supply passes over a fixed wire bail 210 to the traversing thread guide 136 and when a bobbin is completed the yarn arrives at an inclined part of the bail which is adjustable to give the desired length of bobbin, and runs down against a pivoted wire bail 220 which is thereby moved on its pivbts 224 and through a connecting link 226 tilts a mercury switch 235 which thus completes a circuit through the solenoid 115 which draws the head 117 within its bore to release the completed bobbins which drop down shoots 280 to a collecting box ; the solenoids 115 in series with their respective switches 235 of the two associated winding spindles are connected in parallel to the conductors supplying current to the circuits. A bobbin in falling down. the shoot 280 depresses a pivoted gate 285 against the action of its spring 283 and, through a pivoted bellcrank lever having arms 291 extending beneath the gates and a loop 293 engaging .the arm 294. of a pivoted lever moves a link 298 and causes the tilting of a mercury switch 275 which completes the circuit through solenoids 240, each of which, when energized, draws a rod 245 within its bore against the action of a spring and causes a pinion 247, carried by an upstanding part 246 of the rod and engaging a fixed rack, to rotate and move a sliding rack 250 so that a block on the rack' engages and rocks a pivoted lever 265 on the thread guide bracket 135, a cam edge 272 on the lever engaging the nut 138 and moving it out of engagement with the threads 137 on the rod 130 while further sliding movement of the block moves the thread guide back to its original position; as soon as the bobbins have dropped past the gates 285, these are elevated by their springs and clamp the yarns proceeding from the 'supply against the sides of the shoots and the lever and link 298 are returned by a spring so restoring the switch 275 and opening the circuit to the solenoids 240, springs then return- 'ing the racks 250 and associated parts to their inoperative positions. As the thread guide returns to its initial position, the thread guide bracket 135 encounters an inclined arm 537 on the rod 130, the arm raising the guide so that a hook 501 on a member 500, Fig. 35, .engages the yarn from the supply to the gate 285 and takes it in front of the spindle cup 95 so that it is clamped thereagainst when the fresh bobbin is donned. Each member 500 is slidable 'and oscillatable on a fixed rod 428 and lies on an inclined guide 540 which raises it as it is moved along the rod towards the spindle cup by a pivoted lever 515 connected by a rod 530 to the armature of a solenoid 525. The solenoids 525 are connected in parallel with the circuit for the solenoids 115 which circuit is closed by the switches 235 and move the rods 530 after they have been given an initial movement within the cores of the solenoids 525 by pins 545 on a part of the donning devices. Immediately the yarn guides have been returned to their initial positions and the yarns positioned as described above, solenoids 470 are energized and draw down plungers 477 against the action of springs 700. Each plunger has a pin 480 engaging a slotted bifurcated lever 485 pivoted on the rod 428 and having a lug 488 engaging a slot 489 in a cam extension 490 on the arm 426 of a frame 425 carrying fingers 445, 446 which, when a bobbin has been doffed, are, moved adjacent and beneath the spindle cups 95, 105 to support a fresh bobbin in position until engaged by the cups. The cup 95 is held retracted until the thread guide has been restored to its initial position and a fresh bobbin placed into alignment with the cup, by holding the switch 235 closing the circuit to the solenoid 115 tilted until the plunger 477 is drawn down to actuate the bobbin-delivering means, a screw projecting from a collar 478 on the plunger then engaging the horizontal arm of a weighted and pivoted bell-crank lever the other vertical arm of which is then rocked to release the tail end of an arm 225 on the bail 220. The empty bobbins are stacked in a magazine 401 adjustable to the length of the bobbins and are normally supported on guideways by a U-shaped gate 455 pivoted on a rod 438 and a second U-shaped gate 460 also pivoted on the rod has a pair of fingers 461, which while the lowermost bobbin is being discharged move through slots in the magazine between the lowermost and the next adjacent bobbin to support the stack; the gate 460 is actuated by the cam extensions 490 on the arm 426 engaging a stud on an arm of the gate and the gate 455 by the cross bar of the frame 425 engaging a finger 493 thereon; when the empty bobbin has been donned by the solenoid being de-energized, the circuit to the solenoid 470 will be opened and the spring-700 returns the parts of the donning device to their original inoperative positions. In order to ensure that the spindle cups 95 are held retracted until the empty bobbins have been delivered thereto and that the bobbins are supported in place until engaged by the cups, a timing switch 555 is included in the circuit of the solenoids 115 and 470 and is reset after each doffing and donning operation the switch, Fig. 22, comprising a drum of insulating'material having two bosses 570, 571 which are separated by a flange 527 and, with end flanges 567, 575 are secured to a square metal tube 565 carried by a spindle 556 rotatably mounted in brackets 560, 563 on the machine frame. The bosses are provided with metal contact pieces 576, 577 of different lengths and spring-pressed brushes of square section engaging the contact pieces are mounted in sockets on an insulating block 590, Fig. 24, and a corresponding brush for the contact piece 576, being directly, and the brush 581 through the switches 235, connected to one of the supply leads, and a brush for the contact piece 576, corresponding to the brush 581, through the solenoids 470 to the other lead. The tube 565 carries a pinion 600 having teeth on its upper face to engage similar teeth on the lower face of a ratchet-wheel 601 fixed to the spindle 556 so that by slackening a nut 566 at the end of the spindle the pinions and wheel may be relatively adjusted to vary the timing of the switch and the pinion 600 is engaged by a rack 655 on a rod 660 mounted on the arm 663 of the armature 670 of a solenoid 665 the rack being forced by a spring 654, compressed between the arms 663 and a collar 661 on the rod, to rotate the pinion 600 and so the switch when one or other of a pair of escapement pawls 611; 612 are disengaged from the ratchet wheel 601; the pawls are alternately actuated by noses 623, 624 on a rock shaft 621 operated from the traverse rod 90 which carries a lug 199 adapted to engage the end of a lever 630 pivoted at the end of the rock shaft 621 when the lever is moved into the path of the lug by a pivoted lever 635 having one end yieldably connected by a spring 639 with the lever 630 and the other end 641 pressed by a spring into engagement with the flange 575 of the switch drum; the flange 575, which has a cam edge, allows the lever 641 to move at the completion of a winding operation so that the lever 630 moves out of the path of the lug 199 on the traverse rod and the switch is reset and the spring 654 compressed by the energizing of the solenoid 665 which is connected in parallel with the solenoids 240. Before the body of the bobbin is wound a bunch x is wound at the base of the bobbin by a yarn-retainer 150 which automatically catches the yarn y at the commencement of a winding operation so that it is not laid on the bobbin by the yarn guide 136 and automatically releases the yarn for the main winding by the guide 136 at the completion of the bunch. The yarn-retainer 150 is carried by a rock shaft 155 and is held in the bunchbuilding position by a plate 200 engaging a cam block 160 on the shaft and, after a predetermined number of traverses of the traverse rod 90, the plate 200, which is carried by an escapement lever 174, is withdrawn from the block