US1248206A - Yarn cutter and holder mechanism for circular-knitting machines. - Google Patents

Description

H. L. TRUDEL & H. B. DAWSON.

YARN CUTTER AND HOLDER MECHANISM FOR CIRCULAR KNITTING MACHINES. APPLICATION FILED DEC. 5. I912.

1,2%8,g@6. I Patented Nov. 27, I917.

3 SHEETSSHEET I.

.L5Z\ v b-J u I I V 5 H. L. TRUDEL & H. B. DAWSON. YARN CUTTER AND HOLDER MECHANISM FOR CIRCULAR KNITTING MACHINES.

APPLICATION FILED DEC. 5. IQIZ. Lg%8,2@6. Patented Nov. 27, 191.7.

3 SHEETSSHEET 2- H. L. TRUDEL 64 H. B. DAWSON.

YARN CUTTER AND HOLDER MECHANISM FOR CIRCULAR KNITTING MACHINES.

APPLICATION FILED DEC. 5. I9I2.

LQQSQCIG. Patented Nov. 27, 1917.

3 SHEETS-SHEET 3- iUIWJPJED enemas Pannier @FFIQE.

HENEYL. 'rnnnnr. AND nowaan a. nawson', or rrswrcn, ranssncn'csn'rrs, nears-rt ons, BY ransnn ASSIGNMENTS, To see RATION QB MASSACHUSETTS.

'I'T dz WELLIAMS, INCQRPUEt-ATED, .EtCORPQ YARN CUTTER AND I-IOLDER MECHANISM FOR CIRCULAR-KNITTING raacnrrrns.

Specification oi Letters Patent.

Patented Nov. 25?, 19312;

Application filed December 6,1812. Serial No. 735,120.

To all whom it may concern:

Be it known that we, HENRY L. Tnnonn, a subject of the King of Great Britain, and HOWARD B. DAWSON, a citizen of the United States, residents of Ipswich, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Yarn Cutters and Holder Mechanisms for Circular-Knitting Machines, of which the following is a specification.

Our invention relates to circular knitting machines, and particularly to such machines as are organized to knit sectionally spllced tubes,.for instance stocking machines organized to knit a stocking having a high spliced ankle or spliced sole, but in which it is in tended to knit the instep or top of the foot of unspliced or single-yarn fabric.

One object of our invention is to provide a clamp and holder mechanism for a yarn removed from active engagement with the knitting needles able to operate efiectively on a yarn which is knit during a part of a course only as a splicing yarn, and to this end our device provides a cutterv and clamp or holder device applicable to cut the yarn at least once in each revolution of the machine, at a point very close to the fabric, and to hold a yarn so cut ready to be again inserted duringthe next succeeding revolution or part revolution.

Further objects of our invention are to provide an eflicient device for this purpose, and means to operate it, of such. a character as to avoid the encumbrance of any of the existing parts of the machine, and particularly to avoid the necessity of interfering with the device when the latch guard ring is to be lifted for access to the needles.

Other objects are to secure the eflicient au tomat-ic operation of the device in time with the automatic operations of the knitting machine to which it is applied, and the automatic positioning near the fabric, and removal. therefrom, of the cutting implements.

plete understanding of the entire machine, only so much of which is shown and described in the present application as is necessary to make clear the application of our invention to the machine 1mproved.-

In the accompanying drawings,

Figure 1 is a left side elevation of a part of a machine built according to the disclosure of the said patents, showing our improvement attached; i

Fig. 2 is a right side elevation of said machine showingthe latch ring elevated, as for the transfer of a rib top;

Fig. 2 is a detail front elevation of the left hand end of the cam or pattern shaft,

such as the shaft 8 in the said Patent No.

Fig. 3 is a plan view of the knitting head showing our device in place;

Fig. 4 is a section on the line 4-4 of Fig. 3 showing the cutter and clamp proper in its active position; I

Fig. 5 is an elevation similar to Fig. 4 showing the cutter and clamp removed from the neighborhood of the needles and the forming edge of the fabric;

Fig. 6 is a detail of the cutter showing the opposite side from that shown in Figs. 4 and 5; I

Fig. 7 is an enlar ed view of the cutting and clamping mem ers viewed from the central axis of the machine;

Fig. '8 is a detail perspective of the cam for actuating the cutter and clamp.

The frame of the machine 10 supports a ,main driving shaft 11 anda pattern or cam shaft 12, which latter derives its working As is well known in the art and specifically shown in the patents above referred to, said shaft '12 is given a movement through a variable angle of advance by means controlled by a pattern chain carried upon, but not attached to, said shaft 12. This pattern chain, which is well known in the art and is not shown, may be constantly advanced by a ratchet motion actuated from the shaft 11, and carries lugs to determine the times and extent of the angular movement of the shaft 12. In the orderly operation of the said old art machines, the shaft 12 is actuated machine,

I in grooves upon the exterior through one complete revolution during each complete cycle of the machine, for mstance during the production of one com plete stocking.

The frame 10 is surmounted by a table 5, which projects at the left hand side of the which is that shown in Fig. 1, and upon this projection, in a bearing formed therein, the rotary needle cylinder 13 rests. Independently movable needles 14 are guided of the needle cylinder, as usual, under the influence of cams carried by a cam ring 6, all as in said Banner machine.

Fastened to the upper end of the needle cylinder is the usual sinker bed or ring 15; and having a bearing upon sa1d rmg, but restrained from rotation with it, except through a limited arc, is the smker cam ring 16. P

Immediately above and concentnc with the needle cylinder is mounted the latch guard ring wardly on the horizontal pivot 171 in the top of a standard 172 mounted on the bed plate 5.

The latch ring 17 when it is in its horizontal or o erative position rests. upon a projection rom a hollow standing 51 directly over the driving shaft 11.

Yarn is ried by the rotating needle cylinder through an opening or throat in the latch guard ring 17, formed therein at the point about the circle nearest the standard 51, which point is at the gross location of the wave formed in the needles by the cams carried by the cam ring 6. In a radial slot in a projection formed integrally with the ring 17, which slot communicates with the yarn throat or opening above mentioned, a plurality of independently movable yarn guide levers, shown as three in number, 18, 19, and 20, are pivoted on an axis above and outside of the circle of needles, so that the elevation of one of said guide levers will carry its inner perforated end above and to the inside of the circle of needles 14:, in the same manner as in the, said Banner machine.

Also as in said Banner machine secondary levers 181, 191 and 201 cooperate with the yarn guide levers 18, 19', 20 to elevate them to remove the yarn from its operative position, the said levers 18, 19 and 20 being spring-actuated to return them to their operative positions. The automatic actuation of the leversv 181, 191 and 201 is accomplished in said machine by cams 24 carried by the cam shaft 12, which cams are, therefore, re-

lated to the time of the operations of mak-v ing the stocking, as has been indicated.

lhe said cams 24: act on levers 23 which are connected by wire links 232 to the outer ends of said levers 181, 191 and 201. It will be seen that the use. of the yarn levers may.

17, which is free to be swung upfed to the rotating needles carbe varied for man diiferent purposes, but

in the machine as s own levers 18 and 19 are employed to change the yarnfor the leg of the stocking andfor the heel and toe respectively, leaving the lever 20 to be spe-. cially actuated by lever 201 for the splicing operation, with which our new devices are particularly concerned.

A familiar form of the said Banner machine now in use employs for the said special actuation of the lever 20 a cam 241, properly placed on the cam shaft to bring it into action at a point considerably above the ankle of the stocking, while the machine is still upon circular work, and before the operation of narrowing and widening has begun. This cam 241, through a lever 231,

' bell crank lever 60 actuated by a plate spring 61 is independently connected to the lever 201 by an adjustable wire link 62, similar to the links 232, having a bend or loop to take over lever 201, which is thus provided with two links. The link 62 is passed loosely through a bore in lever 60, and adjustably held by a nut screwed on its lower end, heneath said lever 60. Whenever the cam 241 permits the lever 201 to descend under the influence of the spring of the yarn guide lever 20, the bell crank lever 60 will be thrown against the cam 59, whichwill thus actuate the lever 201 and its yarn guide lever 20 twice during each revolution of the machine, to allow the splicing yarn carried in the bore in said lever 20 to be taken by the needles during substantially one-half a revo lution. When it is no longer desired to highsplice the stocking, the cam 241 acts upon lever 231 to cause the lever 201 to hold the lever 20 in its elevated position.

The upward-and inward movement of the inner end of a yarn guide lever when actu-- ated to change the yarn or to take out of work an additional yarn, which has been knitting, carries the yarn thus rendered idle above and to the inside of the circle of neeaeaeoe them in detail except as they appear in Fig. 3 in connection with the devices about to be described.

The said rior clamping and cutting means cannot be relied upon to operate with any certainty when it is proposed to operate the yarn guides at each revolution of the machine, and especially when it is proposed to operate one of them to enter its yarn into work and take it out again during 180, more or less, of the revolution of the needle cylinder. Persistent operation of a yarn guide to this effect creates a series of diametrically extending float yarns which are diiiicult to take care of by devices occupying a central position in the open top of the needle cylinder. This condltion is due to the relatively small slack to be found in the diametrically extending float as it would appear from a yarn guide normally operated to splice half the tube, without the in tervention of an internal clamp or cutter. On the other hand, if slack is specially created by the clamp and cutter device, it becomes diflicult to cut the yarn, especially at a point remote from the last knit loop atwhich it was attached to the fabric. In order to provide means for obviating the above difliculties,

we have mounted on the latch guard ring at about 30 to the rear of the yarn feed point in the direction for rotary work a bracket 103 to carry above and slightly outside of .the latch guard ring in a radial direction a pivot screw 104 upon which is mounted a positioning member preferably formed as a lever 105 having an outwardly extending toe 106. Screwed on the inner end and forming a part of the member 105 is an L-shaped member 107 whose inner arm reaches downwardly inside of the latch ring to a position within and near the backs of the needles when the lever 105 is in the depressed position shown in Fig. 4. That face of the lL-shaped member toward the backs of the needles is provided with a notch 108, and on the side away from the yarn guides an angular foot or anvil 109 is formed integrally therewith, to receive the yarn and support it against the cutting thrust of a movable chisel or shear blade 110, the cutting edge of which is V shaped.

Movements of the lever 105 about its pivot 104 are for the purpose of bringing the notch 108 and the severing device, including the anvil 109 and movable blade 110, to a point very near the backs of the needles and the forming edge of the fabric thereat. To limit this movement, we provide on the lever 105 a pin 111 taking through a slot 112 in the bracket 103. The pin 111 also serves to receive the thrust of a spring 113 tending to'lift the depending end of the fixed member of the severing device inward and away from the needles.

,machine terminates in a, toe 119 at one side of and near the toe 106 of the lever 105.

Fixedly mounted on the bed plate of the under the outer end of the compound lever made up of the parts 117 and 104 is a hollow post 125 in the upper end of which is housed a plunger 126 under upward stress from a relatively strong spring 124. Through a slot 127 in the wall of said hollow post a pin 128 fast in the plunger 126 projects toward the axis of the knitting cylinder.

Surrounding said post is a sleeve 130 having a slot 131 coincident with the slot 127. A link 132, presently to be described, is fastened by a screw 133 to the sleeve 130. A collar on the top of the link 132 restrains a relatively strong spring 135, which tends to move the sleeve 130 and its attachments upwardly.

The plunger 126 is limited in its upward movement by the top of the slot 127 which takes against the pin 128.

A finger 139 is adjustably held between two jam nuts on the reduced and threaded upper end of the plunger 126, and the sleeve 130 carries at its upper end a lug 140 having an adjusting screw 141 for contact with the toe 106 of the lever 105. The finger 139 contacts with the toe 119 of lever 117. Under the free stress of both springs 124 and 135 acting upon and moving upward the screw 141 and the finger 139 respectively.

against the relatively weak springs 113 and 143 the depending L-shaped member 107 is moved downwardly and outwardly to the position of Fig. 4, which position is detormined by slot 112 and pin 111 as above ex plained, and the movable blade 110 is closed upon the anvil 109. If now the plunger 126 is moved downwardly, the position of the lever 105" will not be altered, but the lever 117 will be thrown upward by the light spring 143 to lift the blade 110 and uncover the slot 108. The reverse movement of blade 110 is caused, to effect clamping the yarn in the notch 108 between the face of the member 107 and blade 110. and cutting it against anvil 109, whenever the spring plunger 120 is permitted to move upward. The cutter may, therefore, be {ICU}: ated by moving the pin 128 down in the slot 127, and then releasin it, and the severing mechanism as a whol e may be positioned near the work, or away from it, toward the center of the-machine, by movement of the sleeve 130.

\Vhen the sleeve 130 is sufiiciently depressed, for instance when it is in the position shown in Fig. 5, the top of the slot 131 contacts with the pin 128 and prevents the rise of the spring plunger 126.

Surrounding the head of the needle cylinder 13, and fast on the sinker bed 15, and therefore rotating with the needle cylinder and needles, we mount a cam 50 which moves in a path intersecting the upward part of the path of movement of the pin 128, except when the upward movement of the said pin is-restrained by the sleeve 130.

It will be understood that the part of the cam 50 active to cut the yarn can be located with accuracy with respect to the needles and the fabric formed thereby, the cam 50 being adjustably fixed with respect to the needle cylinder 13.

During the knitting of the leg of the stocking, which takes place at high speed, and sometimes results in bellying upward of the beginning of the leg before there is suflicient weight of formed fabric to cause it to pass smoothly downward inside the cylinder, it is very desirable to keep the region back of the needles free of any fixed parts, which might engage the fabric and result in damage. On the other hand, a cutting device to satisfactorily out yarns taken out of work necessarily must operate close to the back of the needles and the fabric at the moment of its operation. We avoid this danger and enable our device to cut the yarns with the least possible separation of the cutting-point from the back of the fabric, by automatically removing the cuttingpoint, at the anvil 109, from near the needles, and returning it to this position, at the end and the beginning of the splicing operations, by means of the movable lever 105, its cooperating parts, and a connection to the pattern shaft 12.

The said connection comprises the link 132, extending downwardly through a bore in the bed-plate 5 to one end of a lever 145, pivoted on a stud 146 on the left side of the machine frame.

The other end of lever 145. rests upon a cam disk 147 secured on the outer or left end of the shaft 12.

On the periphery of the disk 147 a cam 148, following the splice above the ankle, and a cam 149, following the splice along the sole, are secured. The rotative position of these cams is such as to bring them under the end of lever 145 in time with the active position of the other control elements, on shaft 12, for the same parts of the stocking.

In operation, the end of the lever 145 rests upon the cam face 149 of greatest radius of disk 147 during theknitting of the leg of the stocking, holding the sleeve 130 in its lower position, shown in Fig. 5, thus permitting lever 105 to hold the L-shaped member 107 in the withdrawn position shown in said figure, and also preventing spring plunger 126 from rising to place pin 128 in the path of cam 50.

Lowering of lever 145 by the passage of cam 148 or 149 will permit lever 105 to descend to permit member 107 to be positioned near the fabric, and will permit plunger 126, and therefore blade 110, through the anism just before the guide 201 begins to act, and so as to cause said lever to remain in this position until after cam 241 has operated to cause the splicing yarn guide to cease feeding its yarn.

When it is desired to elevate the latchring 17, for access to the needles, as when about to transfer a rib-top to the needles, there are no fixed connections to be removed, the foot 119 and thefoot 106, which are the actuated parts, resting loosely upon the finger 139 and screw 140, so that the latchring is free to be elevated, and again lowered, thus breaking and again making the connection between the yarn severing device and its operating parts, without requiring the attention of the operator.

What we claim is:

1. A knitting machine having in combination a yarn severing implement for severing a yarn withdrawn from knittingat the back of the fabric and near the point of exit of said yarn, and means for moving said yarn severing implement into and out of proximity to the forming fabric.

2. In a knitting machine, means to sever at the backof the needles andnear the point of exit from the fabric a yarn withdrawn from knitting, in combination with means for removing said severing device from its place for action at predetermined times.

3. A circular knitting machine, having means to sever a yarn withdrawn from knitting at the back of the fabric within the needles and close to the point of exit from the fabric of said yarn, comprising a severing implement and clamp for the severed yarn, in combination with means for moving said implement and clamp toward and away from the fabric at predetermined times.

4. A knitting machine having means for severin a arn withdrawn from knitting at the back of the fabric and near the point of lit 1 x exit of said yarn comprising a yarn severing implement and means for moving said implement into and out of proximity to the forming fabric, and means for operating said implement to sever the yarn while in. proximity to the forming fabric at the back of the needles.

5. A knitting machine having a yarn severing and clamping implement and a sectional splicing yarn feed device, means to actuate said implement to sever, clamp and release the splicing yarn, in combination with automatic means for bodily removing said implement from its working position at predetermined times during knitting of unspliced fabric.

6. A knitting machine having a yarn severing and clamping implement normally in working position near the fabric and a splicing yarn guide, means for actuating said implement when in said position and for actuating said yarn guide at related times at similar intervals, to release and supply and to remove, sever and clamp the splicing yarn at the edges of a spliced area, in combination with means operating at relatively infrequent intervals for bodily removing said implement from working position and for causingcessation of operation of said yarn-guide.

7. A knitting machine having in combination a needle cylinder and needles, a yarn guide and means for moving said yarn guide to enter and withdraw a splicing yarn, and means to sever said yarn within the needles and near its point of attachment to the fabric, and automatic means for moving said severing means to and from its operative position.

8. In a knitting machine, a movable yarn guide, means to move said guide into and out of operative position, knitting needles, and means to actuate them; in combination with means to cut and hold the yarn from said yarn guide when in an inoperative position, and means to move said cutting and holding means to an'inoperative position with respect to the yarn guide and needles at predetermined times.

9. In a knitting machine, yarn feeding means including a yarn guide and means to render it active or inactive at predetermined times, a yarn severing device, means permitting said yarn severing device to be moved from an active to an inactive position, and the opposite, and means to move said yarn severing device to an active position when the yarn guide is about to be actuated.

10. A circular knitting machine having in combination, needles, a splicing yarn guide, means to hold said guide idle during a plurality of courses, and to operate said guide for sectional splicing, yarn severing and holding means, and devices for positioning at said yarn severing and holding means withneaaaoa in the needles and near the forming fabric during actuation of said yarn guide, whereby to receive and sever the splicing yarn close to the forming fabric when said yarn guide is withdrawn and to deliver the sev-' cred end of the yarn close to another part of the fabric upon the reentrance of said guide to operation.

11. In a knitting machine, and means for moving said yarn guide to feed and Withdraw its yarn at intervals, a yarn severing device, and means for movin said device at intervals of a plurality of movements of said yarn guide into and out of position to encounter a yarn withdrawn by said yarn guide.

12. In a circular knitting machine, in combination with a rotary needle cylinder, a movable yarn guide and means for operating said guide to insert and withdraw a splicing yarn from and to the space within the needles at each revolution of the machine during a predetermined number of such revolutions, severing and holding means for the yarn movable into and out of position to sever and hold the splicing yarn at a point near the place of its withdrawal from the fabric, and means to move said severin means into and out of "its working position,

13. In a circular knitting machine, a rotary needle cylinder, a movable yarn guide and means for operating said guide to insert and withdraw a splicing yarn at each revolution of the machine during a predetermined number of such revolutions, in combination with severing and holding means for the yarn movable into and out of position to sever and hold the splicing'yarn at a point near the place of its withdrawal from the fabric, means to move said severing means into and out of its working position, and means to operate said severing means while in its working position at each passage of said place'in the fabric.

14:. In combination in a knitting machine, a rotary needle cylinder, a splicing yarn guide and means to operate it to enter and remove a splicing yarn, a relatively fixed cutter and holder for the splicin yarn, and means rotating with said need e cylinder for actuating said holder to release the yarn at or near the time of passage of the fabric at the point of entry of said'splicing yarn, and means for removing the cutting and holding mechanism from the neighborhood of the fabric.

15. In a knitting machine having a yarn guide, means to actuate said yarn guide at relatively short intervals for sectional splicing and a pattern mechanism controlling said yarn guide for said purpose, in combination with means acting to sever the yarn when said yarn guide is in an inoperative position, positioning and operating a yarn guide members for said severing means, and means under the control of said pattern mechanism for preventing operative movement of said positioning and operating members at predetermined times,

16. In a knitting machine, a series of yarn guides and means to actuate certain of them-for yarn changing, a yarn clamp and yarn severing means for severing and holding a yarn withdrawn from knitting by one of said yarn guides, in combination with means for actuating one of said yarn guides for sectional splicing and a severing device of said yarn guides, in combination with means for actuatingone of said yarn guides for sectional splicing and a severing device operative to sever the splicing yarn only.

19. A knitting machine having a series of yarn guides and means to actuate certain of them for yarn chang ng, and one of them Mia severing device for any of the yarns m-' cli 1ding the splicing for sectional splicing, in combination with yarn operative to sever a1yarnwithdrawn at the completion of the ;;.,1part of the fabric including 40 ing yarn onl 7 said yarn, and another severing device acting on the splic- 20. A knitting machine having in combination means for feeding and withdrawing a plurality of yarns in succession, common means for severing and clampin said yarns when withdrawn, means for eeding and withdrawing one of said yarns during each course knit, and other severing means adapted to sever said yarn when so withdrawn.

21. In a circular knitting machine, a series of yarn guides, means for actuating certain of said yarn guides to exchange the1r yarns,

and means to sever and clamp a yarn withdrawn from knitting thereby, in combination with means for actuating one of said yarn guides to withdraw and again enter another yarn in the same course, and a yarn lease said other yarns at points close tosaid severing and holding device coiiperatin with said otheryarn at the places of sai withdrawal and entrance to cut and to replaces,

22. A circular knitting machine having in combination needles a yarn feed mechanism comprising 9. mm 1e yarn guide adapted to be thrown into and out of operation, a positioning member within and at the backs of the needles, means carried by said member for severing the yarn from 'said yarn guide, and mechanism for moving said member to position saidsevering devlce near the fabric, and to withdraw said device from proximity to" the fabric during operation of the machine.

' 23. A circular knitting machine having in combination needles, 3. yarn feed mechanism com risingjmovable yarn-guides, one of whlch is adapted to be thrown out of operatlve position to withraw its yarn within and toward the backof the needles and fabno, a positioning lever depending within and at the backs of the needles, means for sever-mg and clamping the am from said yarn gulde, carried by said ever for movement into and out of proximity to the fabric, an operating lever for said severing and clamp ng means, means for moving said pos1t1omng lever, and means for actuating said operating lever when said severing device is in proximity to the fabric.

24..A circular knitting machine having needles, means for feeding and withdrawing a plicing yarn and a splicing yarn severing devlce comprlsmg a positioning member for moving said severing device into and out of proxlmlty-to the knit fabric, an operating member for said severing device, and pattern-"controlled connections for moving said positioning member in combination with means for actuating said operating member when said severing device is positioned in proximity to the fabric only.

25. A circular knitting machine having in combination a needle carrier and needles, a cam-carrier and cams, and means causing relative rotation of said carriers, means for feeding and withdrawing a splicing yarn, and asplicing-yarn severin' and clamping device comprising a'positioning lever carry- 1ng sald severing device and an actuating lever therefor, a pattern operated connection for moving said positioning lever, and means having a part rotating with said rotary carrier for actuating said operating lever when said positioning lever i in one position only.

26. In a knitting machine, needle and cam cylinders, independently movable knitting needles in said needle cylinder, a. latch guard ring surrounding theprojected positionof said needles, yarn-guide levers mounted on said latch ring, and independently movable with respect thereto, and with respect to the needles, yarn severing means to sever the yarn from a yarn guide in an inoperative position and actuating means therefor comprising means relatively fixed with respect to the needle cylinder and means to remove the severing means from the neighborhood of the needles and to cause the actuating means to cease to operate.

aaaaoe 27. In a knitting machine, a cam cylinder, a needle cylinder and needles therein, a latch guard ring surrounding the position of proj ected needles, a series of yarn guide levers,a

pattern shaft and means operated by said shaft to control the position of the yarn guide levers, in combination with a yarn severing device mounted on said latch ring for movement with respect to the needles, means independent of said latch ring for moving said severing device toward and away from the backs of the needles and means actuated by said pattern shaft for operating the means for moving the severing device.

28. In a knitting machine, a needle cylinder and needles therein, a yarn guide lever, a pattern shaft and means operated by said shaft to control the position of the yarn guide lever in combination with a yarn severing device mounted for bodily movement with respect to the needles about a horizontal aXis, means for moving said severing device toward and away from the backs of the needles about another axis and means actuated by said pattern shaft for operating the means formoving the severing device.

29. In a knitting machine, a needle cylinder and needles therein, a yarn guide lever, a pattern shaft and means operated by said shaft to control the position of the yarn uide lever in combination with a yarn severing device mounted for bodily movement with respect to the needles, means in free contact with a part of said severing device when said device is in one position for moving it toward and awayvfrom the backs of the needles and means actuated by said pattern shaft for operating the means for moving the severing device.

30. In a knitting machine, a cam cylinder, a needle cylinder and needles therein, a latch ring surrounding the position of projected needles and pivoted at one Slde so as to permit it to be elevated away from the needles, a series of yarn guide levers on said latch rlng, a pattern shaft and means on said shaft to control the position of the yarn guide levers, in combination with a yarn severing device mounted on said latch ring for movement with respect to the needles, and means controlled from said pattern shaft having an element upon which a part of the severing device rests for moving the severing device toward and away from the needles when the latch guard ring is in its operative position.

31. In a yarn severing mechanism for circular knitting machines, a needle cylinder, a latch guard ring, a lever pivoted on said latch guard rin comprising a depending fixed cutter and 0 amp member having therein a notch for the yarn to be cut and clamped, a spring to lift the depending end of said member to a position upwardly and inwardly away from the needles, a movable cutting blade mounted on said depending member, an actuating lever therefor, means to depress said depending member to an active position at the backs of the needles and near the edge of the forming fabric comprising a post on the bed plate of the machine, a plunger in id post, a sleeve surrounding said post, adapted in one position to contact with and limit the movement of a part carried by said plunger, a cam fast to the needle cylinder for operating said plunger, pattern controlled means to operate said sleeve, and means on said plunger to contact with the actuating lever for the cutter blade.

In testimony whereof, we have signed our names to this specification in the presence of two subscribing witnesses.

HENRY L. TRUDEL. HOWARD B. DAWSON. Witnesses:

GEORGE W. HAYEs, WALTER E. HAYWARD.

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