Patent GB-156607-A (GB)
Title: Winders
IPC: B65H54/26
Filed: 1921-01-06
Abstract: 156,607. Barber-Colman Co., (Assignees of Colman, H. D.). Nov. 28, 1916, [Convention date]. Void [Published under Sect. 91 of the Act]. Winding-machines; clearing-apparatus; stopmotions; thread guides; creel arrangements.-Relates to machines for winding yarn from bobbins on to spools or cheese cores, particularly to machines comprising a number of winding-units and provided with " winder-tending mechanism," which is arranged to travel along the winder and tie the ends from reserve bobbins to the ends on cheeses other than those that have attained the desired size when the bobbins from which the cheeses are wound are exhausted and to perform other operations necessary for the re-starting of the winding. In the machine described, each winding-unit comprises a drum 1, Fig. 1, for rotating the spool and guiding the yarn thereon from a bobbin a, the yarn from a reserve bobbin d being held in a clamp 49, and the " winder-tending mechanism " travels on an elevated rack-rail 86, Figs. 11 and 37. The core on which the spool is wound is held between a spring-pressed tongue and a flange on a hub pivotally supported on an arm 30, which carries a looped link 33 and is thrown over to the, position shown in dotted lines in Fig. 1, when the link is moved into the path of an oscillating hook 34 by an arm 84 on a spring- controlled spindle 80. Normally the arm 84 is withheld from the link by the engagement of the yarn with feeler fingers on the spindle 80. A lug 40, Fig. 7, integral with the arm 30 is engaged by a bell-crank lever 38 which carries a hanger 41 connected by a spring 42 to one arm 43<a> of a lever the other arm 43b engaging with a surface 44 on the lever 38. As the cheese grows the lug 40 moves upwards with the arm 30 and the pressure of the cheese on the drum diminishes, and the arm 43b tends to prevent the return of the cheese towards the drum so that, should the cheese have any tendency to become eccentric, the high part thereof will be under greater pressure than the low part. A guide 57, Figs. 1 and 10, the interior width of which is approximately the width of the cheese, is provided with a zig-zag guide-way 61; when the yarn is exhausted the guide exercises sufficient resistance to prevent the yarn being thrown by the cam laterally off the periphery of the cheese, and, when the cheese is replaced on the drum, the full engagement of the yarn with the cam-groove is delayed by the guide-way 61 until the cheese has been accelerated. The clearer 62 comprises a fixed plate 63, Fig. 5, an adjustable plate 64 and a pivoted notched arm 69 cooperating therewith. The active bobbin holder 46<1>, Fig. 1, is pivoted at 46b so that it may be tipped to eject an exhausted bobbin, and the reserve bobbin support 47 is pivoted so that the bobbin may be discharged therefrom into the holder 46<1> by a cam on the " winder tending mechanism. " The " winder tending mechanism " comprises a base frame 88, Figs. 36 and 37, and a depending frame 89, and is propelled along the rack-rail by a pinion 93 engaging therewith and geared to a vertical shaft which is actuated manually by a handle 533 or by an electromotor through a belt pulley and clutch 205. The motor is connected to shoes, attached to the frame 88 by a pivoted arm and contacting with conductors in a trough 105, Fig. 11, and switches are arranged in the supply circuit and so operated that the " winder tending mechanism " is stopped for a period at the end of the frame, and is restarted so as to be ready to operate on the units when the supply bobbins are exhausted. A switch in a shunt circuit is closed after a determined period by means driven from the cam shaft, and as soon as the mechanism starts a roller thereon operates an arm 184, Fig. 11, and closes the main switch 136 and, by means of an arm 187, opens the shunt switch, the main switch being opened upon the return of the mechanism by the engagement of a lug 151 on the base 88 with a lever 153. A hand switch in the shunt circuit may be closed by the operative at any time to start the mechanism. The winding-units are normally idle when approached by the "winder tending mechanism," and the arms 30 are engaged by a plough 250, Fig. 37, so designed as to lift them over an oscillating device 258, which presses the end of the cheese core to ensure that the tubes are correctly seated, on to the end-finding device. If any winding-unit is still running, the yarn is clamped by a roller on the mechanism and broken, and the arm 30 turned over on to the plough 250 by a plough 249. A feeler device 267 engages any arm that is not correctly seated on the plough 250, and by means of levers 270, 219 disconnects the clutch 205 and stops the mechanism. The endfinding device comprises rollers 278, 301, Fig. 54, rotating so as to tend to unwind the cheese, and a tortuous duct 291 which is connected to a suction device driven by the motor and draws the end through a hook on an oscillating arm 316 by which it is carried to a knot-tying mechanism and united with the end from the reserve bobbin, the slack being subsequently taken up by the rotation of the cheese in the normal direction by means of a roller 391. If a loose coil be drawn laterally off the periphery of the cheese it is severed by a device 293 comprising stationary and oscillating blades. The clamp 49 is opened and the end from the reserve bobbin is engaged by a guide 342, Fig. 56, arranged beneath a suction tube 339 and one strand of the bight brought down by the arm 316 is engaged by a hooked arm, which carries it into throat-ways in the tube 339, and into the guide 342 and pushes both yarns into a clamp 355 to hold them in position to 'be tied by a rotating bill 328, a valve being opened in the tube 339 to carry away the ends which are sheared by stationary and oscillating blades 385, 386. After the ends are tied the arms 30 are turned over by a plough on to a cam surface 425, Fig. 36, which lowers them so that the cheese is again engaged by the drum. During this movement the cheese engages with blades 434, 435, and is thereby caused to rotate to take up the slack yarn, and the plate 435 is automatically raised as soon as the cheese engages with the drum. If the cheese is of the required diameter the clamp 49 is not opened, and a feeler finger 505 engaged thereby operates a locking-device which permits a cam to operate arms 361, 361<a>, Fig. 56, and push the yarn from the reserve bobbin out of the path of the knot-tying device; the yarn from the cheese is severed in the above-described manner, and upon the cheese being returned to the drum the feeler device and spindle 80 operate the stop-motion. Rollers on the mechanism engage the arms 38<b>, 43<a>, so that the lever 38 is withheld from the path of the lug 40 during the return of the arm 30 and so that the full pressure of the spring 42 is not imparted until the cheese has been accelerated. The bobbin holder 46<1> is tipped by a bar 516, Fig. 37, and the reserve-bobbin holder 47 by a cam 520, Fig. 56, which, if the cheese is of the required diameter, is so moved as to be inoperative. The clearer is opened to receive the newyarn and is cleaned by a blade and is subsequently closed by a spring-pressed arm 474, Fig. 5. The detector fingers are restored to operative position and cleaned by a brush 479, Fig. 37. If there be a cheese or any other obstruction behind the brackets 48, Fig. 1, a feeler 527 is moved thereby and raises the arm 30 of the winder-unit that is being lifted by the plough so that the mechanism is stopped in the same way as when an arm is not correctly seated on the plough. The air current for finding the end on the cheeses is derived from an exhauster driven from the motor, and is utilized to draw the waste ends into a centrifugal separator, the bottom of which is opened during each travel of the mechanism to discharge the contents by a cam 246, Fig. 11. The discharge from the exhauster is directed by means of a nozzle 531, Figs. 1 and 38, to prevent the accumulation of dirt and lint near the yarn. The driving-belt of the exhauster is automatically moved on to the fast pulley when the mechanism starts and on to the loose pulley when it returns by the engagement of a Lever 235, Fig. 11, with cams 238, 237.