USRE916E - Improvement in machines for knitting stockings - Google Patents

Description

UNITED STATES THE NEVARK PATENT HOSIERY COMPANY, 0F NEIVARK, NEW JERSEY, ASSIGNEES, BY MESNE ASSIGNMENTS, 0F HENRY BURT.

lMPROVEMENT IN MACHINES FOR. KNlTTlNG STOCKIN GS,.&G.

Specification forming part of Letters Patent No. 3,'275, dated September 23, 184,3; extended 7 years g Reissue No. 9| 6, dated February 28, 1860.

To vdit' whom it may concern.-

Be it known that HENRY BURT, of Bostou, in the county ot Suit'oll; and State o Massachusetts, did invent certain new and useful Improvements in Machines for Knitexact description thereof, reference beingK made to the accompanying drawings, forming a part of this specification-that is to say:

method had been devised whereby the variations of the width of a knitted fabric necessary to the shape ofthe desired article-.as a

stocking, shirt, &c.-could be produced anto- In all power knitting-framesthe fabric had been made of an uniform width, l 'Y andthe article was cut ont of it to the shape inatically.

desired. This, besides causing a great waste of material, also produced an inferior fabric, from the fact that there was not a perfect selvage at the cut edges. In other knitting frames or machines, it' the materiai were widcned or narrowed, it was done by the hand of an operator.4 By the improvement of said B'QRT any desired variations in the width of 'the' fabric as the work progresses may be etfected automatically.

The nature o f. said invention consists, then, in combining with a knitting-machine which forms a looped or knit fabric generally in the usual manner a mechanism which eii'ccts automatically the desired variations in the width of the fabric, or in theforin of the fabric at the edge, according to any pattern or shape, by means of a design or pattern previously prepared in accorda-nce therewith.

' In Figure 1 is a top viewl of a knitting-fran1e having combinedwith it a pattern-cylinder for ett'ccting the variation in the numb/er of stitches to bc made as the work progresses, in order to. widen and narrow the fabric in accordance with the governin g design ofsaid pattern-cylinder, and for a detailed description of the said machine I refer to Letters Patent'isi sued to said company and bearing even date i herewith.

AThe pattern-cyiinder is represented at n and z, and is shown as attached to the knitting-frame from the iefhhand end. This cyl `inder effects the widening or narrowing hy stopping `the varlrguide over any particular needle and retaining it there, and italso is employed to cause the reversing ofthe motion and the traveling ofthe yarn-guide in the reverse direction, keepin g up this action so long` l as knitting is being,` done.

The governing device upon the patterlrl'cylinder consists of al series of stops or notches cut upon the edge of the drums and o, fac# Previous to the date of said invention no@ ing each other, and as clearly seen in the drawings. These notched edges approach and recede from each other, ieaving the space between them at varying' distances apart. fr stud, 114, upon a rod, ai, extending` from the and forth, strikes upon one or the other of tion in' which it is moving, and-its further i movement is thereby arrested. The pattern, i cylinder, being; made to revolve upon its axis i with a properly-regulated motion, brings in g succession-every notch and portion ot' the pati tern-edges past the stud bi, and accordingly acts upon it. The space between these edges i, therefore exhibits proportionately the shape l the fabric will have.

; At P P are seen guides which support the yarn-guide carriage, aspace being left between l for the toothedy rack N, Fig. II,'attached beneath to the said carriage, to pass down to the driving-pinion M. The slide of the carriage is seen at o, and has upon it xtures to which the yarn-guide IV is attached. This fixture consists, in the tirst place, of a forked arm, V V, one end. of which is attached to tho slide-plate o in the following manner: i

At Q Qis represented two studs, between which is supported a rod, It, upon which plays this is aiiixed the arm V. 1t will be perceived that space is thus left for thc'tube to slide i i l i l l i i i necessary because the'yarnguide tube must 1 have its motionrarrested the moment-that the yarn-guide carriage, as the latter plays back.

these notched'cdgcs, according` to the direc` a tube, S, of less length than the rod, and to upon the rodbetween the studs Q. This is the spot it was left at upon per end of which theyarn-guide tube iV is atand made to interlock with thus the motion of the yarnguide is instantly stud b4 strikes the pattern-cylinder, in order that it may stop at the exact needle, while the carriage itself continues to move on until it has effectedv the reversing ofthe shifting-bar.

At T is a friction-spring fastened to S, having a detainingstud passing down from its end through a hole'in the tube, so that it can press upon R, and thusovercorne the momentum and cause the tube to be carried alongon 1t, when the detaining-clntch is disengaged. y

Suspended in the fork of ,V is supportedthe cross-head of a T-shaped piece, Y, to the upl tached. that the tube may be removed out of the way of the needles when the presser-bar shall come down to close the barbs. Y

vImmediately behind the tube S, and lying parallel with it, is a rack of pointed teeth, k supported in standards in such manner that i it may swing to and from the tube S, and upon the tube is 'a tooth, 1,', projecting toward It. The moment the stud b* strikes the pattern on the cylinder the long rack is forced forward the tooth l', and

arrested opposite to any given needle indicated by the pattern. To accomplish this the pattern-cylinder is made to be capable of sliding along the shaft ys, upon which it revolves, so that by this sliding movement it may operate upon the shifting or reversing bar u', in the manner described in the Letters Patent` already herein referred to. When the movement of the carriage o has brought the stud b to strike against the pattern-barrel, it drives the latter along its shaft yf.

The shiftingibar u is connected to the end of the pattern-barrel, and is thus also moved, l and this again effects a motion ot' the rack k', i as follows: At p is a lever, one end of which i presses upon the 'nach ofthe rack 1c. The other l terminates in a roller, S This roller rides upon a bar, t', attached to the shifting-bar u',

The har t has two depressions, so that as the shifting-bar moves, the roller is raised and causes the end p to press upon theiraolni thereby engaging its teeth with that on the il tube Sv, and holding it thus engaged until the l sinkers have been depressed, the needles witht drawn and pushed out again for the completemformation of the stitches of the last course, when the shifting-bar effects the rei versal, and the roller S', dropping into the opposite cavity on t', disen gages the rack again. After each stitch the pattern-barrel is revolved l a certain distance to bring another portion of the stops upon it to bean.' This is effected by a circular ratchet-wheel, i4, upon the end of the shaft ya, the turning of which partially revolves the barrelby a feather engaging in a i groove upon the hubs of the latter in a comi mon manner.' The clicks/or pawls work from i a vibrating rod, et, connected to a crank, c4, t upon the end ofthe shaft g. The knitting is z multaneously in acton, f or y engages with clutch of the other is to shaft H is that whichpropels to and fro over the row of needles, the cam-shaft and operatesA upon the sinkers in a manner common ing-wheel C being l the clutch L is engaged with K', the

, K, at the same time moving a toggle-lever,

action oi' two shafts, ll and gf, which lie ata right angle to each other, as seen in the drawings. These shafts are. never as the clutch ot' one the main driving-'power the be disengaged. The

while g is and needles, together with certain other parts, to knitting-frames. At L is a clutch which engages and disengages between two bevel-wheels,l and K, which ret volve in opposite directions, This piece can swing in the fork so the shaft in accordance with whichever wheel l it may be in gear with. The cam-sh aft revolves and of course turn only in one direction. lts clutch c2 engages in the pinion A', always in motion one way.

The operation will be as follows The dri v.-

in motion in the direction of the arrow, the two bevel-wheels I and 'K will be driven in the direction indicated'.

shaft ll will, through its pinion M Fig. 1I, acting l upon the rack N, propel the yarnguide carri age o in the direction ot' the arrow, Fig. l. rlhus l the stud b4 will be carried toward the patternbarrel Z3,and, striking that, will push both por tions of the same along the supportingshaft y". rThe shifting-.bar uf being' moved thereby, the

. roller S will mount the elevation on tand at 'once throw the rack it forward to engage the yarn-guide tube S and arrest its further mo-v g tion. course of yarn upon the shanks The yarn-guide will lthen have laid a of only thc number of needles permitted bythe pattern i barrel, (it being understood that yarn was be- 1 ing supplied in the usnal'way.) Meantime, the carriage continuing its motion, the rod lt will slide through the tube S until the shifting-bar has performed its office of discngaging the clutch L and of engaging that of The shiftin g-bar, moving the right angled-lever b3, connected with the clutch L, disengages it from k3 through the connectingrod gg, the straighten ing of which toggle thrust-s the clutch c2 into gear with A.. The clutch L then stands halfway between the two bevel-wheels I and K, and of course all further motion in the-yarn guide carriage and shiftin g-bar is arrested un til the camshaft g', thus set in mot-ion, acts upon the needles and sinkers and until all is eiecte'd that belongs to that part of knitting,

, as usual, to complete the course and as de#l scribed in the patent hereinbefore referred to. At .this time the projection 'n3 of the shiftingbar is upon the roller y', and the lever 113, Fig. I has its angle of direction opposite to that shown inthe drawings, and tending by the tace of the spring S3 to thrust -it toward the left-hand end ot' the knitting-frame. The piu e (shown in dotted line) is at the opposite side i of the depression rh-seeking to enter one of the cavities y2. As the WheelwZ-is moved by the cam-shaft, one of thedepressions is caused the yarn-guide' to ce ne into position when said shaft has performed its oitce for the completion of the stitr" i. The pin a', which is now pressing hard agaif .st the circle bounding x2 by the thrust of q, enters y2 when that comes along into the proper position by the further sudden movement of the shifting-bar u. This movement causes the'toggle k3 to be cranked in the opposite direction to that shown, and this, With- 1 is brought to act upon lthe yarn-guide, and thus it regulates theavidths ofthe fabricasthe knitting goes on.

Having thus described the character of the invention of the said HENRY BURT, which is claimed therein as new, and which the afore said company desires to secure "by Letters Patent, is

The combination, with a knittingqnachine which is capable of producing a fabric of uniform width, ot' a patterncylindcr or equiva lent governing,` device having upon it 'fa prearranged pattern, in snch manner that said device shall control automatically the formation ot' more or less stitches or loops as the work progresses, whereby variations in the Width ot' the fabric may be effected in accordancewith said prearranged` pattern, as set forth herein.

In testimony whereof 1', the said DAVID A. HAYES, have hereunto subscribed my name as such president, and have caused the seal of said corporation to be hereunto aixed this 26th day of December, A. D. 1859.

J. P. PIRssoN, S. H..MAYNARD.

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