Patent GB-195603-A (GB)
Title: Improvements in striping mechanism for circular knitting machines
IPC: D04B9/30
Filed: 1923-03-08
Abstract: 195,603. Wildman Manufacturing Go., (Assignees of Howie, K., and Taylor, W. 0.). April 3, 1922, [Convention date]. Circular machines.-Relates to striping mechanism for a multi-feed latch or beardedneedle machine which operates by throwing the feeds in or out of action by means of a central power-driven control mechanism which is itself controlled by pattern mechanism of the jacquard type. The invention is described in connection with a latch needle machine having a rotary needle cylinder. In order to render the yarnguide 5 at any feed inactive the needle-advancing cam a at that feed is retracted. Each cam a is carried by an arm b pivoted at c and held by a spring d against a pin e operated by a lever 10 pivoted at 11. There is also a star-wheel 7 at each feed, on a vertical shaft the lower end of whih embraces a flat cam 6 which alternately operates and releases the lever 10 at successive quarter-revolutions of the star-wheel. The opposed pair of arms 7<11> are situated in a lower horizontal plane than the arms 7'. The starwheel axle. can be moved vertically so as to bring either pair of arms within range of a travelling dog 9, by means of a bracket 8, which can be moved about an horizontal pivot by a bell-crank 14, Fig. 1 pivoted at 15 to the stationary sinker cam ring 16. Each bell-crank is operated by a rod 17 which extends radially through a ring 18 forming part of a central control mechanism mounted on a post 19 depending from a bracket 20. The rods 17 are controlled as follows :-An oscillating ring 22, Fig. 6, held down on the ring 18 by screws 18<1> carries a series of plates 23, one for each feed. Each plate 23 is pivoted at 24 and can be. depressed by a headed push-pin 25 against the action of a spring 23<x> to bring a dog or pawl 27 on the underside into the path of a star-wheel 28. The pins 25, one for each plate are slidably guided in a head 25'. The left-hand side of Fig. 6 shows the normal position of the plates; the right-hand side shows the position of a plate after operation by a pin 25. Oscillation of the ring 22 then causes the depressed plate to give the corresponding star wheel a quarter-turn and to turn a cam 30, Fig. 8<a> on the star wheel shaft 29. The cams 30 bear on pins 31 carried on arms 32 pivoted at 33 and carrying projections 33' which abut against and operate the rods 17. The ring 22 is oscillated by a rod 36, arm 39, Fig. 1, and vertical rock shaft 40, the lower end of which carries an arm 4. When a particular feed is thrown out of work the corresponding yarn is carried round into cutter blades on the post 19 and operated at each revolution by a cam 90, Fig. 6, which depresses a rod 84 pivoted to the movable blade 81<1>. A spring 82 opens the cutter when the cam 90 moves away. The loose end of the yarn is held between a spring clamp wire or loop and a fixed plate. The push pins 25 are connected to coiled springs 44 retained within curved tubes 45 and are operated by means of similar push pins 25<x> depending from the tubes and resting upon bell cranks 47. These are operated by rods 48 with hooks 49 engageable by the hooks 51 of slidable pawl arms 50 which are normally raised as shown. The arms 50 are pivoted on a bar 52 which is periodically slid in guideways 53 by means of links 76 pivoted to a rocking frame 63 which is operated through connections 65, 66, 67 and a roller 70 from a cam 71 mounted on the ring 4. The arms 50 rest upon the heads of feeler pins 54 slidably mounted in a carrier bar 55 which is normally pressed upwards by a spring. The pins 54 are adapted, when permitted to do so, to pass down through openings in a fixed plate 60. They are lowered as a whole by an arm 61 connected to the rocking frame 63 and when the perforations on an endless travelling band' g of paper &c. register with the openings in the plate 60, the corresponding pins 54 allow the arms 50 which rest on them to engage the corresponding hooks 49 and operate the pins 25. The jacquard drum 74 is racked onwards by mechanism connected with the rod 36 that oscillates the ring 22. Specifications 189,895 and 217,937 are referred to.