US892933A - Straight-knitting machine. - Google Patents

Description

PATENTED JULY 7, 1908.

' W. W. BURSON.

STRAIGHT KNITTING MACHINE.

APPLICATION FILED $113.4, 1905.

3 SHEETS-SHEET 1.

Inventor.-

Zdizfhesses:

by (cam/a, Q-QQNNS o iorn e y.

PATENTED JULY 7, 1908.

W. w. BURSON. STRAIGHT KNITTING MACHINE.

APPLICATION FILED FEB.4, 1905.

a SHEEN-SHEET s.

In Dania?" A @Q AWQMUQ WY. KMMW oQorne a/ Beer ruminants Corr UN ITE S'l rlt'illi ilt a ATENT @FFICE.

WILLIAM WORTH BURSONfOF CHICAGO, ILLINOIS. i

" STRAIGHT-KNITTING- MACHINE.

Original application filed June '7, 1897, Serial Illinois, have invented a certain new and useful Improvement in Straight Knitting Machines, of which the following is a s ecification, referencebeing' had therein to tie ac: companying drawing.

My invention relates to knitting machines of the class in which there are employed in a given machine two straight rows of needles, such machines being known. as parallel row machines.

The objects of my invention are, in general, first, to provide means to cause the yarn-carrier to move in'proper relation with resp act to the moving needle-actuating cams; second, to provide means forenabling a tubular fabric to be knit with an additional or splice yarn introduced into a longitudinal portion of the same, tliird,'to provide means for crossing said sphce-yarn froin'one row of needles to the other at an intermediate point of the tubular fabric which is in course of being knit, so as to avoid waste of said spliceyarn; and fourth, to .providemeans to cut portion of the length of the the portion of splice-yarn which .extends or crosses from one row of needles to the other, as the knitting progresses.

An embodiment of the various features of the invention is illustrated in the accompanying drawings, in which latter,-

Figure 1 is atop view of certain portions of i a parallel-row knitting machine containing the said embodiment. Fig. 2 is a View in vertical section on the plane indicated by thedotted line 2 2, Fig. 1'. Fig. 3 shows-a view of certain of the parts in section on the same line, the presser-hooks being somewhat farther apart than in- Fig. 2. Fig. 4 shows a resser hook cam-bar. Fig. 5 is a view in e evation on a somewhat lar er scale, SllOWlIl" chiefl" the cw b .l

yarn-carrier. the knife for severing the portion of splice yarn which crosses from one row of needles to the other, and certain of the parts which are concerned in operating --the yarn-carrier, the splice yarn guide, and

said knife, the said devices being viewed from the side that is farthest from the operator. Fig. 6 is a detail view in section on the line 6 6 fFig. 5. Fig." 7 shows, in elevation Specification of Letters Patent.

No. 639,677. Divided and. this application filed February'd, 1906. Serial No.244,07 7. Y r

' Patented July 7, 1903.

which the needle-operating cams are placed in and out of position for engaging with the needles and adjacent parts. Fig; '8 shows the parts of Fig. 7 in plan, and in connection therewith the eccentric block G pertaining to the corresponding needle-operating cam,

and portions of the carrier-arm G: of said cam, the plate B being removed. Fig. 9

shows in elevation the. switch and adjacent parts which are em loved at the .opposite end of the same side 0' themachine, withblock G represented as occupying a ositior slightly to the left ofthe said switch. Fig. 10 shows the block (l at the right hand side of the switch, and as having just engaged the point of the switch in the movement of the needle-operating cams from rig-ht to left. .In dotted lines this figure shows'theinoperative position into which 'the switch may be raised when it is desired to prevent engagement of the block and switch with each other; Fig. 11 shows the same parts asFig: 10, but-represents them in the position which they occupy when block G has been almost completely -turned by the engagement of the switch H therewith. Fig. 121s a detail View showing one of the levers 71- and certain parts connected therewith. 7

Similar letters refer to similar'; parts throughout the differentviews.

It is not considered necessary to illustrate more of the knitting mechanisrn'thanis required to show the im rovemen'ts and indicate the relations and mode of operation thereof. The knit ing mechanism in coin nection with which the invention is employed may correspond in the main wi i that shown and described in United States Letters Patent No. 616,600, granted to inc December 27, 1898.

Having reference to the drawings-at ii in Fig. 2 is represented portion of a machinefranic, it having its upper urfaces inclined at an angle of about'30 to each other. .The opposite needle-beds B B 'are fastened on these inclined surfaces. To the needlebed at each side of the machine are fastened. the guide-bars B and B for the corresponding needle-operating ca1n-slide G, and also the presser-hook supporting-bed or of such side. The bar B which isfastened to the topof the bar B? serve cam-slide G and resser-hddjk-ca n-bar' C" certain .Of the parts adjacent one endof the down in place. T10 plate B projects inmachine, comprising one of fl1i: .S\V1tCl1(S by l ward beyond the inner edgc of thebar B to segment C 1 5 o hold the v particularly in Figs. 1 and 2. G3 is form an upper guide for the block (3} to which.

reference presently will be made. The bar C 'WlllOll 1s fastenedon the segment C at eachside of the'ma'chine serves to hold the nressenhooks C down in place, and serves also as a support along which one edge of'the" yarn-carrier T travels in the movements of the latter. The needle-projecting cam G, Fig. 2, at each side. of the machine, is fas shifted or adjusted, in a direction per enderstood; Motion is dicular to'the plane of the needle-bed, .mto and out of position for engagement with the b1ts 'or hee s ofthe jacks D which areemployed in connection with the needles E. I

resently will explain the manner of effectmgthis shift. or adjustment for the purpose of knitting tubular goods, and the means by which the same may be effected automatically. The needle-retractin cams G one thereof being shown. at the right hand side in Fig.2, are fastened to the cam-slide G in any ,ap roved manner. The jack D, needle E,

an filler-piece E", Fig. 2, are combined and operate in manner which 'willreadily be un- 'iven to the cam-slides G, G, by the crank X jFig'l 1, through pitman connected at one end crank-pin, and at the X ,1 the latter bein thereof to the sai other end thereof to the cross-bar X which is fastened to the ends of the saidcam-slides.

- Referring first to the means of reducing the shift or adjustment of the need c-projecting cams at the two sides of the machine in the order that is required for tubular knitting; the devices'for the purpose which I have shown herein are the same as in my ap plication for U. S. patent for knitting machines filed June 7, 1897, Serial No. 639,677,

of which the present case is a division.

Thus-H, H, are switches which are employed.

at the opposite ends ofeachneedle-bedQas shown best in Fig. 1'. Figs. 7 and 9, taken together, show the op OSIlDG' ends of one of the needle-beds, and t e switches which are located at such ends. As shown best by Figs. 7 to 11, Fig. 3, each switch H is pivoted at 71, upon the inner edge of one of the ars B, and has the inclined projection h adjacent its free or operating end. The free extremity at h The switch-arm is furnished with the upright arm or extension h, which last is enthe movablecontrolling arm or aged by The said armor lever k 1s conever h stituted in the present instance of a strip which is attached byone end thereof to the upper surface of the plate B and at its other or free end enters a horizontal notch in the arm orextension 72%, so that when the arm or a ed the "position into the ino erative of the switch-arm is curved upwardly, as

lever is moved vertically it communicates acorresponding movement to the switch."

U on the plate B adjacent each switch i's inner side 0 which the proximate side ofithc curved part k of the switch takes lateral bearing, thus serving to relieve the pivot h from part of the strain which the operation 'ard projection it, against the of. the switch tends to transmit .to said pivot;

The spring 7%, Figs. 1 and 9, operates with a tendency to hold the controlling arm or lever h depressed, and, Whenpermitted to do so, places and keeps the switch in the o erative. position thereof in which it is s ownby full lines in Figs. 7, 9 and 10. The -controlling arm or lever h is engaged and actuated by means of a push-bar H Figs. 9 1

and 12, which latter at its upper end is notched to engage with the arm or lever h When the said push-bar is moved upwardly, which may be effected either by hand or by the action of suitable pattern-devices, it raises the said arm or lever h and thereby lifts the switch H out of the said operative osition in which it is represented llldOttGd hes in Fig. 10. Each carrier-arm G has mounted thereon upon a ivot in g, Fi s. 9, 1O and ll, an eccentric blbck The atter consists, substantially, of a cylindrical part or body, which preferably is flattened slightly on diametrically opposite portions, and is furnished with a flange that is flattened at the opposite sides thereof correspondingly with the said cylindrical part or body, the said flange being somewhat elongated and formed with pointed ends 9, g.

stud g which connects the same pivotally with cam-bar (l is eccentrically located with relation to the cylindrical portion or body of the said block. By the reciprocating movements of'the cam-slide G the said block, thus pivoted eccentrically to the carrier-arm G which holds the needle (projecting cam G, see Figs. 7 to 11, is cause inner edge of the guide-piece B, beneath the projecting edge-portion of plate B4, and be tween such edge-portion and a lower guide for the block. The said lower guide may be constituted by the upper surface of the adj acent needle-b'ed, or otherwise if preferred. Successive half-turns of the block will alternately raise the needle-projecting cam into inoperative position above the bits or heels of The hole which is. formed in block G for the reception of the to travel along the the jacks, andlowerthesame into operative position to on age such bits or heels and thus cause the nee les to beactuated, as the case ma be. I

eferring to Figs. 7 and 9, 1t Wlll be noticed responding needle-bed in the direction from that in Fig. 9, the block G4 being in the position which permits the needle-projectmg earn .5 posite direction.

merit being indicated in Fig. 11.-- By the new positionvthus given to the block G the pivot y will be. caused to occupy a higher position,

and thereby: the needle-projecting cam G" be raised into inoperative position with 5 relation to the heels or bits of the jacks and during the return movement of-the knitting cams, that is to say, int-he direction from left v to right," the needles of the said needle-bed will-not-be, actuated by such cam. In such 4 return'movement the block G will pass under the-inclinedpiece h of each switch H, there- -'by lifting the respective switches out of the *way-andwill not be turned. In the succeed- 'inggmovement of the knitting-cams from right to left the right hand switch will act to communicate ahalf-revolution to the block G ,,restoring"1tto1ts relative position in Fig. 9,,lower1ng {the needle-promoting cam 111110 operative position, so that during such movemerit the needles of the said needle-bed will be'actuated to knit. At the conclusion of the movement. the left-handfswitch will re peat its action represented by Figs. 10 and 11,.raising'thereby the needle-projecting cam 5 mm inoperative position. While this opera-L tion proceeds at one side of the machine, a 1 corresponding operation will be proceeding upon the'otherf For tubular knitting it Wlll be'understc'iod that when the knitting-cam at v 40 .one side of the machine is depressed into op-' erativeposition for the strokei'n one direction, the knitting-cam at the opposite side of the machine is raised into inoperative position, and vice versa'for the stroke in the op- It will be clear that tubular work may be'knit indefinitely without any change'of tl ie switches if the blocks Gr atthe opposite sides of themachine are started prop- 'erl Changes from tubular knitting to flat 5e kn1ttingpand viceversa, may be occasioned asldesiredby causing the respective switches ftoibe'moved into and out of operative posi- 'tion at the required times, either by hand or .byTpattern-connections. .56- I" he presser-hook cam-bars C C are operated-by the cross-bar X, Fig. 1, through the engagement .of the latter with lugs or bosses 0 .0 with which, the. said cam-bars C C are furnished. f The distance between the said 1ugs-o1jbosses is suflicient to 'permlt a fall backfadjustment of the cam-bars (J G with relation, to the needle-actuating cams at each return moveinentofthe parts.

Having reference now to the actuating devices for the yarn-carrier T,-rods Y Y, Figs.

1 and 5, which are fastened by their outer extremities to the cross-bar X, have connected \\ith the inner eXtremities thereof the yarn-'5 carrier actuating block 1'. By means of the said block the yarn-carricr T is pushed across the needles in the movement of the cam-bars in one direction, through the engagement of the end. of the block with an upturned lug or flange T, Fig. 5, of the yarn-carrier. As the cam-bar returns m'the opposite direction, the

dependinglip. Y of the draft-piece Y upon block Y serves by its engagement with. said lip or lug T of the yarn-carrier to draw the yarn-carrier along. The space between the end of the push-block Y and the depending lip Y. of the draft-piece Y is sul'licient, as in- I dicated by Figs. 1 and 5, to provide for a correct amount of lost-motion or play in the transmission oi movement from block Y to the yarn-carrier to permit the yarn-carrier T cams into proper adjustment with relation to the said cams.

The yarn-carrier T is provided with the loop 22 Figs. 1, 2 and '6, through which the body-yarn passes before reaching the usual distributing or delivery-eye of the carrier. For use in introducing a splice-yarn, a spliceyarn lever V, Figs. 1, 2, 5 and 6, is pivoted upon a vertical stud v with which the yarncarrier '1 is provided. To the hub of the said lever V the splice-yarn guide V is conveniently attached. See, more particularly, Figs. 1 and 6. A spring '1) which is fastened to the lever V serves to holdthe splice-yarnguide V in contact with the upper surface of the yarn-carrier T at the transverse slot t with which the yarn-carrier is formed, and operates to cause the said splice-yarn guide V to follow the said surface as the lever V is swung upon its-pivot. Inasmuch as the upper surface of yarn-carrier T dips downward from both sides to the delivery-eye, the guide V in following the said surface has a compound horizontal and vertical swinging movement. extends from the delivery-eye of the yarncarrier to one side of the latter, as indicated in Figs. 1, 5 and 6, and serves to permit the splice-yarn to be moved into and out of the delivery-eye, in placing the spli'ce-yarn in and out of engagement with the needles, as the case may be. See the full and dotted lines in Fig. 6. For the purpose of operating the lever to swing the latter and the spliceyarn-guidc to move the splice-yarn into and out of position in the yarn-carrier for being engaged by theneedles and knlt, a trip-wire U is provided, it being connected, pivotally or otherwise, at a, Fig. 2, to the support U, which latter is pivoted in turn at u to the upright standard U see more particularly Fig.2, fastened to the'machine.

In operation, I prefer'to start the knitting at the toe, in which case, the-knitting is used only in the sole of begun in the usual manner. The body-yarn is threaded through theguide 42 fastened on tributingeye of the carrier through the slot 7 The splice yarn is threaded through the guide U2 of the splice-yarn-guide V, and then through the distribu ing-eye of the yarncarrier T. Both yarns are knit until the toe is completed. When splice-yarn isto be the stocking, thetrip U and its support U are located in the position in which they are shown in Fig. 1, namely at the middle of the length of the needlebeds. done on the row of needles nearer the operator and from the crank end, the travel. of the'yarn-carrier from right to left will cause the end of the splicelever.V to engage the trip-wire U. As a result of such engagement the splice-lever will first move the trip-wire to the opposite side of the opening "a of the support U, after which the resist ance of said trip will be sufficient to swing the lever and with it the yarn-guide V from the inoperative position shown in'Fig. 1 into the knitting position shown in dotted lines in Fig. 6. The trip then yields to allow the splice-lever to pass. The. splice-yarn and body-yarn will be knit jointly to the left hand edge or turn of the fabric and will be returned on the opposite row of needles until lever -V again comes in contact the trip-Wire, which will now bring the parts back into the position shown in Fig. 1, moving the splice-yarn outward along the slot t of the yarn-carrier. From this point the knitting will be continued with the bodyyarn alone during the remainder of this course, and also during the return movement a spring 20 of the next course until the trip-wire again brings the splice-yarn into engagement with the needles as before described.

In practice, if necessary, any suitable take-up device will be employed to take up slack in the splice-yarn.

It should be noted that. wl'ien the spliceyarn lever is operated as above described at an intermediatepoint in the width of the tubular fabric that is being knit, the spliceyarn will be crossedfroni one side of the tubular fabric to the other. I It will be obvious that this yarn must be severed in order to disconnect the two sides from each other before the goods can be finished. l-provide as follows for effecting the severance upon the machine :A knife W is pivoted upon the pin w 'between the rods Y Y. knife is held normally in its'raised inoperative position, shown by full lines in Fig. 5, by Fig. 1. Its cutting point w is brought into the dotted line position in readiness for engagement with the portion of splice-yarn which extends from the tubular fabric te-tlle-ot er.

\Vhen the knitting is being pivot U, by hand or otherwise. yarn should be removed in knitting these with- The said enemas tactof the projeetion min t e 123;) the rods Y, yarn-carrier, etc, .frnr left, (in Fi 5} with the stop at. v is fastened adjust-ably on'the the support U, the said projectior underneath the stop if in tau movement of thepart 10.. preferably caused to occur near t the knitting "stroke. ment offthe'rods Y, Y, y- I the rear extensionw of the knife, lfVi tact with the stop if, brings the kn. full-line position, Fig." 5, again, in which it is held by spring 0 or otherwise.

. is. In the et-inn move The downwardly inclined lip or piece t,

Fig. 5', fastened to the frontend of the yarncarrier engages with the yarn in the re-' tracted position of the splice-yarn-guide, and assists in holding the s lice-yarn out of contact with the needles w ien not bein'gknit.

, Thetoe and heel of a stocking may be knit with thesplice-yarn and body yarn jointly, and while this is being done, trip-wire U and knife W should be rendered inoperative,

which result is conveniently attained by] raisin the upper end of the, support U on its 3 parts when it is not needed, which is con veniently done by effecting 'a change of yarn' carriers.-

' Referring to Fig. '2 it is seen that the presser-hooks C held by The splice-' the engagement oftheir heels by the walls of the cam-groove c w of cam-bar C come too close together to admit of a knife. passing between them to cut the splice yarn which is'crossed from one I rowof needles to the other about midway of the fabric, whence recourse s had to a change of the cam groove, as c iii'which the hooks are drawn further apart, seeFigs. '1 and 4.- in regular knittingf I claim as my invention:

1. In a knitting mach'ne, in combination,

a yarn-carrier adapted to delivertwo yarns to the needles, provided'wlth a distributing eye and with a transverse slot extending o'utward from the distributing-eye ofjthe carrier.

Cam 0 is used to control the hooks.

beyond the reach of the needles, a guide controlling one of said yarns, and means for opcrating said carrier whereby said yarn maybe moved into the distributing-eye and knit during one. portion of the course,- andnioved along said slot and thus removed from the reach ofthe i needles during another portion of that course.

2. In a knitting machine, ,incombination,

leading transversely front-the said; drstnbutmg-eye beyond the reach of the neeguide in each strokeof theyarnj the yarn-carrier having a (l1StI1bu'QlI1g16y6 and a slot tributing eye to be a trip acting to move said able guide controlling a secondary yarn, and means to trip said movable guide in each stroke of the yarn-carrier into position to conduct the secondary yarn through the disknit with the body-yarn for a predetermined portion of a course in the knitting, and again move it to shift the secondary yarn into the said slot while the remainder of the course is being knit of the body-yarn alone.

. 3. In combination, two rows of knitting needles, needle-actuating cams, and means to operate said cams to effect tubular knitting, a yarn-carrier having a distributing-eye and means for supplying a body yarn continuously to the said distributing-eye, a movable guide controlling'a secondary yarn, and guide in each stroke of t e yarn-carrier to place said secondary yarn in ,the'distributingeye at a predeter:

' mmed point in the knitting in one direction to cause both yarns to be lmitted-together and to again move said guide at a point in the knitting in the opposite direction to re move the secondary yarn from the distributing-eye.

4. In a straight knitting machine, in combination, thereciprocating carrier provided with adistributingbye and with a slot leading therefrom, a splice-lever provided with a guidefor'a s )llCG-Ytllbflfld a trip, as U, engaging with iihe said splice-lever in the movements of the yarn-carrier in both directions,

and operating the same in the movement of the yarn-carrier in one direction tomove the splice yarn'into the saidfdistributingeye to tributing-eye out of reach be knit by the needles, and acting in the movement/of the yarn-carrier in the opposite direction to -move the said splice-yarn through the said slot away from the disof the needles.

5. The combination of a yarn-carrier provided with a slot t, a splice-lever V providedwith a splice-yarn-guide given a movement having both vertical an horizontal com- Whereby the spliceponents, and a yield tri by the needles or yarn may be engage thrown out of en agement as described, subsupply a splice-yarn to the needles, controlling means to cross the splice-yarn from one series of needles, to the other at an intermediate point in the width of a tubular fabric, and a cutter to sever the portion of splice-yarn extending from one side of the tubular fabric to the other.

8. The combination with opposite series of needles and devices for actuating the same, of a carrier for a knitting-yarn, spliceyarn feeding devices effecting a yarn from one side of a tubular fabric to the other at an intermediate point the widthof the fabric, and a cutter traveling in unison with the carrier and operating to sever the portion of splice-yarn which extends from one side of said fabric to the other thereof.

9. The combination with the yarn-carrier, of the pivotally-niounted knife moving in unison with the yarn-carrier, and the stop-by which the said knife is actuated.

10. The combination with the yarn-carrier, and the splice-yarn-guide, of the knife moving iii-unison with the the operating devices for the splice-yarnguide and knife.

In testimony whereof I affix my signature in presence of two witnesses.

.WILLIAM WORTH BURSON.

Witnesses Ones. F. RANDALL, EDITH J. ANDERSON.

change of spliceyarn-carrier, and

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