Patent GB-374551-A (GB)
Title: Improvements in or relating to lap forming mechanism of openers, scutchers and like machines
IPC: D01G27/04
Filed: 1931-03-27
Abstract: 374,551. Lap forming apparatus. RAMSDELL, T. S., Peltonbrook, Great Barrington, Massachusetts, U.S.A. March 27, 1931, No. 9399. Convention date, April 7, 1930. [Class 120 (i).] In automatic lap-forming mechanism of the kind described in Specification 313,139, [Class 120 (i), Spinning, Preparation &c. for], having calender rolls 16 .. 19, Fig. 1, carrier rolls 14, 15 and a lap rod 30 on which the lap 110 is wound, the lap is severed between the rolls 14, 19 after a predetermined length has been wound by the action of positively operable clamping rolls 20, 21 which are stopped to arrest the lap and cause it to be broken by the continued rotation of the lap roll. If desired, the rate of rotation of the rolls 20, 21 is varied instead of the rolls being actually stopped. The machine is driven through a main driving-shaft 11 and operates continuously. The doffing operations are controlled in sequence by cam members on the operating shaft 50 which is driven through worm and bevel-gearing 51 .. 55, Fig. 2, from the shaft of roll 19. A disc 56 is connected to the gear 55 and is notched at 56a to receive a lug 57a on a lever 57, Fig. 5, the lever carrying a second lug 57c supporting a tripping finger 59 pivoted at the end of an arm 60 keyed on the shaft 50. A pawl 61 is pivoted on the pivot pin 60a of the finger 59 and is adapted to engage the teeth of a ratchet wheel 62 fixed to a gear 63 loose on the shaft 50 and normally rotated by a pinion 64 on the shaft 11. When the predetermined length has passed through the calender rolls the disc 56 will have completed one revolution and the lug 57a drops into the notch 56a, the finger 59 being released from the lug 57c the pawl 61 will drop into engagement with the ratchet wheel 62 and the arm 60, keyed to the shaft 50, will be rotated with the ratchet-wheel 62 for one revolution, on completion of which the disc 56 will have moved the lug 57a out of notch 56a, the finger 59 will ride over the lug 57c and lift the pawl 61 to stop further rotation of the arm 60. During the revolution of the shaft 50 the following operations take place in succession : (a) The rolls 20, 21 are stopped thereby severing the lap. The roll 21 is driven from the shaft 11 through gears 66, 67 and a clutch 67a, 68 held in engagement by the arm 70, Fig. 4. A cam 71 on the shaft 50 is arranged to give three positions of the arm 70 ; as in Fig. 4 for normal operation ; the clutch elements 67a, 68 disengaged and the roll 21 stopped; and the clutch 68 engaged with an element 74a to drive the roll 21 through gears 74, 75 faster than normally to carry the severed end of the lap to the newly-positioned lap rod. (b) The lap support 78, Fig. 2, is dropped by the cam 81 to accommodate the accumulated lap fed forward by the roll 19. (c) The brake shoe 39 is withdrawn from the brake wheel 38 on the shaft 37 of the rack-bar pinions by the engagement of cam 83 with link 43, the brake being held inoperative by a pawl 46 engaging a lug 47. Subsequently, the rack bar 33 when lowered trips the pawl 46 and the brake 39 is moved by the counterweight 45 to engage the wheel 38. (d) The compressor members 32 are raised by engagement of the cams 84 with links 36. (e) The full lap roll is moved on to apron 106 by the arms 93a of members 93, through the engagement of cams 85 with links 90. (f) The new lap rod 30 is raised from the seat 29 over the crown 31, Fig. 1, to roll into the position 29a, by the engagement of cams 86 with rollers 95 on the members 96. (g) The clamping roller is speeded up to carry the accumulated lap to the empty lap rod. (h) The curlers 104a, Fig. 3, on links 104 projecting from the toothed sectors 103 are moved by the cams 87 actuating the rack bars 102 to start the fresh end round the new lap rod.