Patent GB-403225-A (GB)
Title: Improvements in and relating to automatic lap winding machines for use in the preparatory operations of spinning
IPC: D01G27/04
Filed: 1932-12-19
Abstract: 403,225. Lap-forming apparatus. STEIN, M., 79, Baross U., Budapest. Dec. 19, 1932, No. 35922. [Class 120 (i).] In an automatic lap-winding machine having racks 6, Fig. 1, which are raised and lowered automatically and in which an empty lap rod 3<1> is substituted for the finished lap 2, Fig. 4, when a predetermined length has been wound, an ejector 45 and a supplying device 48 are connected to or controlled by the racks so that during the raising and lowering thereof the wound lap is thrown from the winding position on the driving rollers 4, 5 and an empty lap rod is guided into position thereon. The lap is wound under a cover 10, Fig. 3, controlled by an arm 12 a spring actuated lever 14 normally engaging the pivot 13 and holding the cover in pressing position until an arm 16 engages a finger 17 and frees the pivot 13 whereupon the cover 10 is lifted upwards. When the lap is completed the stop-motion counter 19 moves the lever 21 about the pivot 20 and thereby allows the arm 23 to drop and to carry the gear 24 away from the gear 25 on the shaft of the bottom press roller 1, the press rollers ceasing to rotate. The driving rollers 4, 5 continue to rotate and sever the lap 2. The lever 23 also actuates a two-armed lever 28 about its pivot 27 lifting the rod 30 and moving the two armed lever 32 about its pivot 31 thus engaging the gear wheels 34, 36 and thereby, through the members 35, 37-43, raising the racks 6. The member 45 is lifted with the racks 6 and engages the pivots 9 of the lap rod 3 the finished lap rolling therealong to the trough 46, while on further raising of the racks the guide 48 releases the empty lap-rod 3<1> which rolls downwardly. At this moment the toothed segment 37 ceases to mesh with the gear 38 and the racks 6 fall into the winding position. In a modification the pivot 44 is arranged within a slot 1161 of the guide 45 and the guide 48 is connected by a link 112 to the rack 6, the members being shown in their lowered and raised positions in Figs. 15 and 16. The later part of the downward movement of the racks 6 is braked by a shoe 49 on a counterweighted lever 54 engaging a friction pulley 50 on the shaft 39, the action of the brake shoe being controlled by a cam disc 51 which engages a roller 53 on a lever 52. While the cylindrical part of the disc 51 engages the roller 53 the pulley 50 is free. When the recesses 55, 57 free the roller 53 the brake operates, the braking action being interrupted by the nose 56 between the recesses 55, 57 to ensure that the racks reach their lowest position. Alternatively the racks are positively lowered through reversing the gear 43. As soon as the rails have attained their lowest positions the wheel 34 is thrown out of mesh with gear 36 by the counter 58 while the cam 61 strikes the roller 62 and through the lever 28, 29 and rod 26 lifts the lever 23 to engage the gear wheels 24, 25 and restart the rollers 1. The cover 10 is lowered together with the racks 6. The cover 10 may also be raised and lowered by means of cords or wires 67, 89, Figs. 5 and 6, the cord 67 passing under a fixed roller 65 and being secured to an eccentric disc 66 while the cord 89 is secured to a roller 69 on the shaft of the disc 66. In another arrangement the gear 24 is independent of the arm 23 so that the rollers 1 continue their rotation and the finished lap is ejected on to two constantly-driven rollers 161, 162, Fig. 7, the lap being severed by teeth 160 on the cover 10 which is lowered for this purpose, the winding of the new lap roll then proceeding under the cover 10. The rollers 161, 162 may form part of the weighing device. The wound laps are automatically removed by a conveyer 75, Fig. 8, the trough 46 being pivoted at 71 and raised from time to time by a cam 73 so that the laps roll down the oblique guide 74 and the pivots 9 are engaged by the claws 76 of the conveyer 75. Alternatively the laps may be removed by the claws 76 as in Fig. 17. The trough 46 forms part of a weighing device, the weight of the lap being shown on a scale 79, and if the weight varies outside admissible limits the machine is stopped. Contacts 80, 81 are provided on the scale 79, Fig. 9, at the limits of the admissible lap weight and on engagement of either contact by the pointer 82 the lamps 86, 87 or 93, 87 light up, the electromagnet 107 breaks the clutch 92 and stops the cam shaft 35. The number of bad laps are indicated on a recorder 109. A short-circuiting device 85 is provided to ensure that the circuit is open for a sufficient period to allow the weighing mechanism to settle down. The cam-shaft 35 is intermittently rotated from the driving-shaft 102. Two rods 96, 98 are urged together by a spring 99 and on completion of the lap the pivot 22 is turned to depress the rods 96, 98 and engage the clutch halves 101, 101a thus rotating the shaft 102 and through it the cam-shaft 35. When the pivot 22 is turned to restart the machine the rod 96 is pulled upwardly and when the shaft 35 has turned sufficiently to allow a lug to snap into a recess in a fixed disc 103 the clutch-half 101 is moved to the left and the rod 98 lifted by the spring 99. In a further modification the racks are raised and lowered by an electric motor 116 through gear wheels 117, 118, 43, Fig. 20. The arm 119 of the motor switch 120, Fig. 18, is governed by a plate 121 having a cam groove 135. When the arm 23 falls the rods 126, 127 are lowered and the bell-crank 129 turned to couple the clutch halves 124, 125 and rotate the plate 121, the rod 119 moving downwardly and closing the circuit I thus starting the motor and lifting the racks. Continued rotation of the plate 121 raises the rod 119 and reverses the motor. Switches 152, 153, Fig. 20, are provided to limit the movement of the racks. In further modifications the switch may be controlled by a slot 138, 139 in the rack itself, Fig. 21, or the switch 155 and the brake lever 52, Fig. 22, may be operated by rods 149, 156 associated with the arm 23.