Patent GB-468003-A (GB)
Title: Improvements in or relating to circular knitting machines
IPC: D04B9/26
Filed: 1936-01-02
Abstract: 468,003. Knitting. JACKSON, L. MELLERSH-. (Standard-Trump Bros. Machine Co.) Jan. 2, 1936, No. 172. [Class 74 (ii)] Relates to the production of normal and reverse plating to form patterned articles such as stockings &c. by selective manipulation of the sinkers. The plating is, or may be, confined to single sinker wales. The invention is described as applied to circular machines with elongated rotary-reclprocating needle-cylinders 2. Each needle trick contains a rocking jack 42 with frangible butts 48, an intermediate jack 38, and an upper jack 14. Mounted in the sinker dial 28 below the sinkers 30 are other jacks 20, the inner ends of which are supported in jaws 19 of the jacks 14. In a modification, (Fig. 18), the forked inner ends of the jacks 20<1> engage projections 21<1> on the jacks 14. Fig. 18 also shows the position for normal plating, the loops being drawn on the front edges 32 of the unselected sinkers. Just before the needles draw their loops, the jacks 20 are also moved inwardly by cam action on their butt 83. If the jacks are in the upper position, as shown in Fig. 1, their projections 21, which have turned over ends 23, engage lower projections 36 of corresponding sinkers 30 and move them inward. The needles thus draw their loops on the back of the nibs 31 of the corresponding sinkers and so reverse plate. These sinkers are then moved back slightly by a cam 171, Fig. 3, to draw out loops or for other purposes. The needles are momentarily raised and lowered by cams 86, 87 to allow the reverse plated loops to get to the front of the nibs 31. The dotted lines a .... h, Fig. 3, show alternative paths for butts 10, 18, 46 and 40. The rocking jacks 42 are controlled by a battery of cams 60 from a trick wheel. Those jacks not engaged by any of the cams 60 are pushed up by a cam 64. The corresponding needle butts 10 follow the path b and engage the cam 74, which brings the butts 18 of their jacks 14 to the level d for reverse plating. The paths a, b for the butts of normal and reverse-plating needles respectively unite at the clearing cam 54. When cam 82 is reached the needles will have taken yarns. In the arrangement according to Fig. 1, all the jacks 20 are projected by the cam 82, though only the horizontal jacks engage sinkers. By providing these jacks with multiple butts as shown in Fig. 18, and selectively operating them by means of cams 82<1>, 82<11> the patterns may be reduced to skeleton form, or modified in other ways, or be entirely wiped out where not required. During reciprocation the jacks 20 are moved outwardly by a cam 53 and the jacks 14 are raised by cam 51A, to prevent needles thrown up by pickers from fouling jacks and sinkers. There may be several independent batteries of cams each controlled by its own trick wheel. Clocks &c. may be formed in addition to the normal and reverse plated pattern extending throughout the stocking &c. By keeping the lowermost cam 62 continuously in operation during the formation of the foot, normally plated sole fabric is obtained. U.S.A. Specifications 1,821,848 and 1,927,568 are referred to.