Patent GB-253630-A (GB)
Title: Improvements in yarn selectors for use on rug making and like machines
IPC: D03D39/06
Filed: 1925-03-26
Abstract: 253,630. Felton, W., Willber, C., Oldroyd, F. H., and Turkey Rugs, Ltd. March 26, 1925. Tufting-machines. - In a rug-making or like machine coloured yarns are selected in accordance with the pattern by mechanism comprising a set of levers 13, Fig. 4, operated singly by a pattern band 9 to raise a corresponding plunger 18 into the path of independently-moved means,- which co-operate, therewith to change the yarn. In the construction shown the plunger is moved by oppositely reciprocating shifter-bars 44, 45, Fig. 3, to a predetermined position; this movements shifts a carriage 5, slidable on a bar 4 and shafts 3, 27, to operate yarn-changing mechanism connected thereto. The plunger operating-means are actuated either mechanically of electrically. The pattern band, cards, or the like passes between plates 40, 41 around a perforated drum 6 on a shaft 23 journaled in the carriage. A lever 34, Fig. 1, is spring-pressed against a cam 36, Fig. 3, on a driven gear-wheel 38 mounted on the frame 1, and is thereby actuated to oscillate the shaft 27 through a link 33 and a lever 32. A cranked rod 31 is fixed between arms 29, 30 pivoted on either end of the carriage. The shaft 23, Fig. 1, carries a ratchet 24 actuated by a pawl 21 which is pivoted to a radius arm 22. An arm 26 on the shaft 27, when moving to the right, Fig. 1, first depresses the cam-arm 29 and with it the rod 31 to act upon the levers 13, Fig. 4, which withdraw the plungers 18 by links 19 and raise the pins 15 from the pattern band. The arm 26 has slotted engagement with a link 25, Fig. 1, pivoted to the arm 22, and further movement of the arm 26 actuates the pawl 21 to rotate the drum 6 the required amount. A spring pressed pawl-arm 86, Fig. 3, engages a ratchet 84 on the shaft 23 to position correctly the pattern-drum after each actuation. The return movement of the arm 26, Fig. 1 allows a spring 39 to raise the rod 31, thus allowing springs 17, Fig. 4. to depress the pins 15 on to the pattern-band. One pin 15 enters a hole in the band and its lever 13 raises the corresponding plunger 18 into the path of the bars 44, 45. The shifter bars 44, 45 are interconnected by a pinion 46 and racks 47, 48, the bars 44 being reciprocated by link-connection to a spring pressed arm 50 pivoted on the frame and oscillated by a cam 53 on the wheel 38. The carriage 5 is connected by a link 55 to an arm 56 on a shaft 57. An arm 59, keyed to the shaft 57, is linked to a sector plate 63, which is pivoted on the machine. The coloured yarns are each passed through a hole 64 and a channel 70 through the plate 63. Oscillation of the plate 63 imparted by movement of the carriage 5 places the required yarn in position to be seized by the gripper 69, Fig. 1. A spring-pressed pawl-arm 66, 67 coacts with a rack 68 on the plate 63 to position it correctly. In the case of a tufting-machine, the arm 59 is slidably keyed on the shaft 57 and the plate 63 is pivoted to the movable tuft-inserting carriers 61. To prevent slackening of the yarns whatever the position of the said carrier, the yarns are passed over rods 75, 73, 79, 78. Fig. 6, in a jointed frame 71, 72, which is pivoted to the machine frame at 76 and to the carrier 61. Guidepins 80 are also provided on a bar 81.