GB704695A - Improvements in and relating to cop winding machines - Google Patents

Abstract

704,695. Winding yarn. MACKIE & SONS, Ltd., J. Aug. 5, 1952 [Aug. 29, 1951], No. 20431/51. Class 120(2) A cop winding machine having automatically operated means for doffing a completed cop, starting. the winding of a new cop and stopping a spindle when the tension in the yarn supplied thereto falls below a predetermined limit, is provided with means controlled by the doffing means which make the spindle stopping means inoperative for a short period after the winding is restarted. Yarn from supply 21 is led under a detector 54, about guide rollers 22, through a tensioner 26. and thence to a traversing cone 30, being built on to the spindle 10, driven by a fast pulley 16, by cones 31. As the cop grows, the bracket 34 carrying the cones 31 and a lever 36, 37, moves upwardly until the lever extension 37 contacts an adjustable " cop-measuring" stop 38, which deflects the lever extension 37, against the force of a spring 39, so that at the next downward motion of the oscillating doffing lever 44, the bracket 34 may be forced downwards and the cover 30, 31 strip the cop from the spindle 10. The lever 36, 37 in swing- ing clockwise under pressure from the doffing lever 44, swings a spring-biased control lever 33 to move a roller 45 from a notch 46 on the cop buttress member 32 to allow the same to swing and the completed. cop to be doffed. The spindle 10, however, which continues to rotate during the normal operation of the machine, begins automatically to wind a fresh cop, the yarn extending to the doffed cop being severed by means not described. Each spindle is provided with an automatic stop motion operative upon breaking or exhaustion of the varn, such motion comprising the detector lever 54 pivotally mounted at 66 on the trip lever 52 pivoted at 60 to the frame, and a catch lever 50 pivoted at 56 to the frame. During normal winding the trip lever 52 is held in the position of Fig 3 by the engagement of a pin 62. on the catch lever 50 with a notch 64 in the lever 52. Attached to the detector 54 is an eccentric 68 which normally stands clear of the upper face of the fast pulley 16 which drives the spindle, the pulley being driven by a belt 14. Pivoted at 70 to the frame is a belt-shifting lever 20, normally abutting the frame at 74 under the influence of gravity, so maintaining a brake 72 on the lever 20 clear of the pulley 16. Upon breaking or exhaustion of the yarn, the detector lever 54 falls to bring the eccentric 68 into contact with the spindle-driving pulley 16, to be driven thereby, so to release the pin 62 from its notch 64 to allow a spring 58 to turn the catch lever. 50 so that it abuts against a pin 78 to move belt-shifting lever 20 to shift the pulley belt 14 on to the loose pulley 18 and bring the brake 72 into contact with the pulley 16, Fig. 5. To restart the spindle 10, a handlever 80 is depressed, a lug 84 thereon lifting the catch lever 50 and re-positioning the' pin 62 in the slot 64, the belt-shifting lever. 20 relieved of the spring-pressure 58, drops to release the brake 72 and shift the belt 14 to the fast pulley 16. A lug 86 on the lever 80 at the same time lifts the detector finger 54 and by holding the lever 80 momentarily the operative can assure that the yarn tension builds up sufficiently to hold the detector 54 in proper position, without instantly re-energizing the stop mechanism. It is stated that during normal working, immediately following doffing and the commencement of a fresh wind, the yarn tension falls and the detector may move to effect an unnecessary stopping of the machine. To prevent this, a holding lever 88 is loosely mounted on the same pivot 70 as the lever 20, and is normally held by gravity against the frame at 74 with a pin 90 just above the tail of the lever 54. When the control lever 33 is swung to bring about doffing, a roller 92 thereon contacts both levers 20 and 88 and swings them to effect (i) the movement of the belt 14 to the loose pulley 18 and application of the brake 72 to the pulley 16, (ii) the positioning of the pin 90 against the lever 54 to prevent it from operating the stop mechanism a pin 94 on the holding lever 88 engaging a notch 100 in a latching lever 95, 96. After doffing, and as the doffing lever 44 rises, the control lever 33 is moved by. its spring 102, the lever 20 swings and the brake 72 is released and rewinding started. The lever 44, now nearly at the top of its stroke, through a trip lever 104 thereon, moves the arm 96 of the latching lever 95, 96 to release the holding lever 88 which then swings to position the stop mechanism for normal winding, Fig. 3.' Specification 683,287 is referred to.