Patent GB-190620-A (GB)
Title: Improvements in or relating to circular knitting machines
IPC: D04B9/38
Filed: 1921-11-26
Abstract: 190,620. Stibbe, G., (Wildman Manufacturing Co.). Nov. 26, 1921. Circular machines; stop-motions.-The stitch cams 12 of a multi-feed machine equipped with sliding bearded needles n, combined web-holders and sinkers 5 and individual rocking pressers 8 are adjusted by means of micrometer wheels 20 with screw stems 29 which work in brackets 19 and abut on sliding rods 17 with coned ends 18 which bear against V-shaped notches in spring- pressed sliding posts 14 carrying the cams 12 and guard cams 22, 23. The sinker cams 24 and the cams 25, 26 which cause the slides 5 to act as web holders are mounted on slide blocks 24<1>, 25<1> which are adjustable along their guideways 24<11>, 25<11> bv rods 28<1> operated on by micrometer wheels 30. The blocks 24<1>, 25<1> have studs 31 the upper screwed ends of which are engaged by set screws 33 which are loosened when adjustments are to be made. The adjustment in an outward direction is done by hand. The wheels 30, 31 are clamped in adjusted position by means of screws 36 which pull clamps 34 with curved seats 35 against the stems 29. The individual adjustment of the blocks 24<1>, 25<1> is restricted by a tongue working in a somewhat wider groove in the block 24<1>. The presser cams are also provided with micrometer adjustmentrs. The thread-guide consists of a bent sheet metal member 40 carried by an arm 41 pivoted at 42 to a block 43 secured to the cam ring. The arm 41 has a broad curved upper end 44 with guide eyes 45 and is held against a stop 46 by a conical-ended spring pin 47. The edge of the guide is inclined downwardly at 41<a> and should a sinker by reason of its butt breaking not be retracted to the correct position it will strike the guide and turn it over as shown in dotted lines Fig. 2, the reduction of the draft on the yarn when the guide is in the new position being utilized to operate a stop-motion. The guide 40 is adapted for plating, one yarn being guided under the front wall 41<x> while the other yarn is directed below a riveted or pinned member 41b. The yarn guide reaches down to a point where the upper yarn feeds at a slight angle downwardly to the sinker nose which is blunt and provided with a shallow recess as shown in Fig. 3, no special reliance being placed on the inclination of the sinker nose for catching and directing the yarn to the bottom of the recess. The sinker stroke is thus reduced in length. A cam 48 is employed to engage the backs of the needles and deflect them slightly outwards; this cam trues up bent needles and compensates for irregularities in the needle cylinder by causing the needles to move in a definite path at the point where the yarn is fed and measured off. This cam also causes the needles to share the duty of measuring off the yarn and enables a low angle sinker advancing cam to be used. A plate 50, Fig. 7, returns abnormally displaced pressers into the normal line before they reach the yarn guide. Each section 52 of the sinker &c. cam ring carries a separate set of sinker and presser cams, a yarn guide &c. and a set of micrometer adjusting devices and when it is found by experiment that uniform knitting has been attained at all the feeds the micrometer scales may be turned to register the same reading or mark, without affecting the adjustments previously made, by slackening a screw 30<c>, which clamps the ring 30<a> between the parts 30, 30<b>, and tightening again in the re-adjusted position.