Patent GB-1011072-A (GB)
Title: An improved textile winding machine
Inventor: NORRIS ALAN HEDLEY
IPC: B65H63/036
Filed: 1961-08-11
Abstract: 1,011,072. Winding apparatus. LEESONA HOLT Ltd. and A. H. NORRIS. Aug. 13,1962 [Aug. 11, 1961], No. 29014/61. Headings DID and D1J. A winding-machine includes a braking system capable of arresting at least the yarn-carrier comprising an electrically-operated member moved into braking position by a rise in the tension of the yarn due to a major entanglement and moved out of braking position immediately after the carrier is stopped. The system may also operate a lever for braking the take-up until the tension is relieved, and it may include means for disengaging the drive to the take-up when the tension rises from a minor entanglement, the carrier meantime continuing to rotate to impart a jerk to the yarn. The system may also operate on run-out or breakage of the yarn. At each winding-position there is a yarncarrier, Fig. 3, and a winding-head, Fig. 1, driven through its own clutch 6 from a main motor. The yarn-carrier comprises arms 10 around which a hank is wound, and rotates, as the yarn is drawn off, about a spindle which extends from a housing 15b and on which it is removably mounted by a spring 29, not shown. The housing is mounted on thw winding-head by a toggle arrangement of links 13 which allows it to be held in operative and donning positions. Pivoted inside the housing is a tension-sensitive arm 11 carrying cams 12, 11a which, with movement of the arm, operate in succession microswitches 44, 39, a greater movement of arm 11 being allowed before switch 44 is operated than before switch 39 is operated to prevent "hunting" due to minor changes in tension e.g. as the package is being built. The yarn makes three loops between pulleys 17 on the arm 11 and a fork 22 Fig. 1, and then passes over a sleeve 21 rotatably mounted on a cylinder which is overdriven, relatively to the speed of the yarn, by a pulley 19. If the tension on the yarn rises, the sleeve is pressed into contact with the cylinder to restore the tension to working level. From the sleeve 21 the yarn passes through a double-disc tensioner 25, a slub-catcher 121 and over a runout detector 7 to a package 3 driven by a drum on a spindle 32. This is driven by a chain 32a which meshes a pinion on the driven side of a clutch 6. The traverse is driven from a cam-shaft 33 itself by a device to prevent ribbon-winding comprising two members 33b interconnected by a pin-andslot arrangement 33c, 33d, one of the members 33b being fixed on the shaft and the other connected to a pinion meshing with a second pinion on the output side of clutch 6. If a minor entanglement occurs, the rising tension between the pulleys 17 and fork 22 pulls the arm 11 downwardly and the cam 12 opens the first microswitch 44 Fig. 5. This isolates the clutchwinding 43. The shaft 32 and the carriers 10 continue to rotate under their own inertia, and the entanglement passes to the other side of the arm 11 so that the carrier tends to rewind the yarn and imparts a jerk to the yarn. If this fails to clear the entanglement, further movement of arm 11 causes the cam 11a to close the second microswitch 39 and thus energize solenoids 30 and 9, the latter momentarily by the discharge of a capacitor 41, a diode rectifier 47 being included in the circuit. The energizing of solenoid 9 causes a finger on a plate 4 to project into the path of lugs 8a on a disc 8 on the carrier spindle to brake the yarn-carrier; the energizing of solenoid 30 attracts an armature 34 and causes a snagging-lever 5, Fig. 1, to engage lugs 27a on a disc on shaft 33, quickly and positively to stop the winding-mechanism. To prevent too big a shock being imparted to the carrier as it is stopped, the disc 8 lies between two friction-discs. A yarn run-out switch 45 operated by the detector 7 is included in the circuit of the solenoids 43 and 30 so that the clutch is de-energized and the snagging-lever is applied if the yarn should become exhausted or break due to the operation of the slub-catcher or otherwise. There are six lugs 8a on the disc 8; consequently when the yarn-carrier is braked, it stops in a position when the entanglement is accessible to the operator. If it is desired not to operate one of the heads, the absence of yarn over the corresponding detector 7 will ensure that the carrier is braked.