US653562A - Circular-knitting machine. - Google Patents

Description

No. 653,562. Patented IuIy Io, |900. n. w. sco'r'r, L. II. D. WILLIAMS aI II. swIIIGLEIIunsT, In.

CIRCULAR KNITTING MAGHINE.

(Application med :une 1a, 189s.) (llo'llodel.) 4.5heets-Sheet I.

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No. 653,562. Patented my lo; |900. mw. scoTT, L. N. n. w||.|.|AMs a H. swlNsLEHusT, 1n.

CIRCULAR KNITTING MAGHINE.

(Applicationmed June 1a, 139s.)

4 Sheets-Sheet 2.

(No Mudel.)

MM 2.15m

Tn: Norms Prrzks co. PHoToLITHo.. wAsumwN. n. c.

, Patented my lo, :900. n. w. scoTT, L. N. n..w|L|.|AMs & H. swmeLEHunsT, 1R.

CIRCULAR KNITTINIIvlV MACHINE.

(App1ication led June 13, 1898.)

(No Model.)

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rus Norms Fergus oo., rnomLlTNo.. wAsmuumn. n. c.

No. 653,562. Patented yIuly I0, |900. K

R. W. SCOTT, L. N. D. WILVLIAMS- & HLSWINGLEHURST, 1R.

CIRCULAR KNITTING MACHINE.

(Application led June 13, 1898.)

4 Sheets-Sheet `4.

(No Model.)

z mms mais oo. vncmxuruo., wnsm'num l NITE STATE PATEMI" FFICE.

RoRERT w. scoTT, or PHILADELPHIA,`LoU1s N. n. wILLIAMs, or ASH'- BoURNE, AND HARRY swINeLEHURsT, JR., or PHILADELPHIA, PENN:

. sYLvANIA.

clRcuLARKNlT'TINe lvlAel-HNE.f

SPECIFICATION forming part of Letters r:Bai-.ent No. 653,562, dated July 10, 190D.

Application led June 13,1898.

To all whom it mwyconen:

Be it known that we, ROBERT W. SOTfJLof Philadelphia, LOUIS N. D. WILLIAMS, of Ashbourne, Montgomery county, and HARRY SwINGLEHURsT, J r., of Philadelphia, Penu-j sylvania, have inventedpcertain Improvements in Circular Knitting Machines, of which the following is a specification.

Our invention consists of cert-ain im provements in the knitting-machine for which L. N. D. Williams and Harry Swinglehurst, J r., obtained-Letters Patent of the United States, dated May 24, 1898, No. 604,646, the object of our present improvements being to provide" an automatic Inachine which will knit a tubeA of any desired length with any desired width of stripe therein, will produce a tight or slack stitch, as required, will enable slack stitches to be formed at those wales which lie at and near the point where the yarn is changed in striping as well as in corresponding wales of the courses preceding 'and following that in which the changelis4 effected, will insure the proper feeding of the new yarn to the needlesy on each change and prevent entanglement of -in end elevation looking vin the direction of the arrow y, Fig. 1', a number of parts in the distance being omitted in order to avoid confusion. Fig. 4 is a sectional plan view on the line w w, Fig. 3. Figs. 5 to 18, inclusive, are detached views of various parts of the machine', illustrating 'features of construction not shown with sufficient clearness in the general views; and Fig. 19 is an enlarged or exaggerated'view of partfof a tubular web of fabric 4such as our machine is designed to produce. v

The iixed table orbed of the machineis represented at 1, this table or bed having suitable depending bearings for a driving-shaft 2, which may be operated either by hand or serai No. 633.347. (No model.)

t power, as desired, the operation in the latter case being controlled by a clutch, which can be moved by means of a shipper-lever3, (shown in Figs. 1 and 2,) so as to arrest the voperation of the machine in the manner here-4 inat'terset forth. .The shaft2 has secured to it a `bevel-wheel 4, which meshes with a bevelpinion 5, secured to or forming part of the needlefcylinder carrier 6, as shown in Fig. 3, This carrier,having an annular flange 7 ,which extends up into the needle-cylinder 8, is split at one or more points, as shown by dotted lines in Fig. 3, and is tapered internally for vthe action of an annular wedge, 9, which has `a hollow threaded stem 10 extending down below the carrier 6 and threaded for engagement with a nut 1l, which bears upon the under side of said carrier and has at its lower end an annular flange 12, whereby it may be readily manipulated so as to draw down the 'wedge 9, and thereby expand the4 split and tapered ring 7 in order to firmly clutch the needle-cylinder 8 to the carrier 6, or the nut Amay be turned in the reverse direction, so as to permit the wedge to rise, and thus permit contraction of the ring 7 until its 4hold upon the needle-cylinder 8 is released andthe cylinder, with its needles, can be removed -from the carrier and from the annular cam-cylinder 13, which surrounds the lower portion of the needle-cylinder and is secured in any appropriate manner to the table or bed 1.

Mounted upon the upper portion of the needle-cylinder is a web-holder ring 14, carrying' a series of radially-guided web-holders 15, which as the needle-cylinder rotates are moved back and forth by a cam 16a and are at other rtimes held in the projected position by a cam 16h, Fig. 17, upon aV web-holder-cam ring 16, which surmounts and surrounds the ring 14, said web-holder-cam ring being prevented from rotating with the needle-cylinder by reason of the engagement of one or other of a pair of lugs 17 on the ring with a fixed arm or bracket 19, projecting upwardly fromthe annular cam-cylinder 13,- as shown in Fig; 3, a certain amount of play being permitted between the lugs 17 in order that the webholderoperating cams will assume their proper relation to the knitting-cams whether the needle-cylinder is being rotated to the right or IOC) to the left. Each of the web-holders 15 has at the bottom a shoulder 15, as shown in Fig. 18, which shoulder by contact with the upper portion of the needle-cylinder 8 will prevent undue inward movement of the webholders when they are passing the points of junction of the cams 16 and 16, undue outward movement of the web-holders at such points being prevented bycontact of the cuter ends of said web-holders with the rim of the web-holder ring 14.

On the shaft 2 is a grooved cam 20, which engages with a pin 21, projecting from the lower end of a lever 22, the latter being hung so as to be free to swing upon a shaft 23, mounted in suitable bearings in the table or bed 1 and in a longitudinally-projecting arm or bracket 24 on said table or bed. The lever 22 carries a pivoted pawl 25, as shown in Fig. 5 and by dotted lines in Fig. 2, said pawl being acted upon by a spring 26, whereby it is held in engagement with the teeth of a ratchetwheel 27, secured to one end of a drum 29, which we will hereinafter designate as a primary pattern-drum,7 and which is mounted so as to be free to turn upon a shaft or spindle 30, secured to and projecting from the table or bed l, a handle 31 at the outer end of the hub 32 of the drum serving as a means whereby the latter may be rotatedv independently of the pawl-and -ratchet mechanism when desired.

Backward motion of the drum 29 is normally prevented by means of a retainer pawl or detent 33, carried by a lever 34, which is hung to a pin 35, carried by a bracket 36, the latter being secured to and projecting upwardly from the longitudinal arm 24 on the fixed table or bed of the machine. By depressing the outer end of the lever 34, however, the retaining pawl or detent 33 can be withdrawn from engagement with the teeth of the ratchet-wheel 27, and at the same time and by the same action the pawl 25 will also be withdrawn from engagement with said teeth, owing to the fact that a set-screw 37 on the lever 34 strikes a projecting tail 39 on the pawl 25, and thereby effects the retraction of the latter. The outer end of the lever 34 may be held in the depressed position for any desired length of time by swinging into engagement therewith a pivoted arm or catch 40, hung to the bracket 36, as shown in Figs. 1 and 2.

Secured to the shaft 2 is a cam 4l, which acts upon an enlargement or shoe 42 at the lower end of a lever 43, which is loosely hung upon the shaft or spindle 30 and carries at its upper end a pawl 44, adapted to engage with a ratchet-wheel 45, secured to the shaft 46 of a drum 47, which we will designate a secondary pattern-drum and which is carried by a yoke or frame 49, having trunnions 50, mounted in brackets 51 on the fixed table or bed, as shown in Figs. 1, 2, and 3. The pawl 44 is acted upon by a spring 52, which tends to pull the toothed end of the pawl into engagement with the teeth of the ratchet-wheel 45, this movement being restricted by contact of the projecting finger 53 of the pawl with a pin or stud 54, projecting from one of the brackets 5l. The upper end of the lever 43 is drawn rearwardly by the action of a spring 55, but this movement is normally restricted by Contact of a pin 56 on the lever with the bent end 57 of an arm 59, the latter being secured to the inner end of the shaft 23. Hence so long as the movement of the pawl 44 is thus restricted it will not move the ratchetwheel 45, this movement being less than the length of a tooth of said wheel. Vhen, however, the bent end of the arm 59 is raised so as to free the pin 56 from its control, the upper arm of the lever 43 and its pawl 44 will be drawn forward under the action ofthe spring 55, so that the pawl will engage a fresh tooth of the ratchet-wheel 45, and when the lever 43 is actuated by the cam 4l will move said ratchet-wheel and also the secondary patterndrum 47 to the extent of one tooth. A projecting stud 5S serves to limit thc downward movement of the bent end 57 of the arm 59, under t-he influence of the spring 58, Fig. 6, and thus limits the rocking movement of the shaft 23 toward the primary pattern-drum 29.

The secondary pattern-drum 47 carries projecting lugs or pins 60,which act upon threadguiding levers 61, hung to a suitable transverse pin on the frame 49, the outer ends of these levers 6l, having eyes for the guidance of the knitting-yarns, and the levers being so disposed in respect to the needles of the machine that when the outer end of the lever is depressed its yarn-guiding eye will be' in position to feed the yarn to the needles of the cylinder; but when said outer end of the lever is raised its yarn will be fed over the tops of the needles and will not engage the same. Hence by a proper manipulation of the levers 6l, duc to a proper disposal of the pins or studs 60 upon the drum 47, any desired one of the levers may be caused to feed its yarn to the needles, the other yarns oating on the inside of the web ready to be likewise brought into action when required, so that the striping of the web by the feeding of different-colored yarns successively to the needles and the change from one color to another can be instantly effected without any stoppage of the rotation of the needle-cylinder.

An arm 62 projects forwardly from one side of the frame 49 and carries at its outer end a spindle 63, to which is secured a hub 64, having a series of projecting blades 65, which fit between the forward ends of the yarn-guiding levers 61, as shown in Fig. l,

the shaft or spindle 63 also having a crank- 66, to which is connected the forward end of a link or rod 67, which is connected at its inner end tothe upper arm of a lever 68, hung to a stud on the frame 49 and acted on by a spring 69, the lower arm of said lever having an inclined head 70, which is adapted to be acted upon by pins 71, projecting from the IOO IIO

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end of the drum 47. Hence whenever said drum is moved so as to cause one of its pins or studs 60 to act upon a yarn-guiding lever the lever 69 will also be actuated and a quick vibrating movement will be imparted to the blades 65, whereby said blades will be irst carried downward to the position shown by dotted lines in Fig. 3, and then again permitted to resume their normal or elevated position under the action of the spring 69, and by reason of this all of the idle yarns will be drawn taut or caused to follow a straight line from the yarn-guiding eyes of the levers to the inner edges of the depressed blades. Hence the yarn of the lever which is being depressed cannot carry down with it any other of the yarns, as it might do if these yarns were simply floating loosely, and the yarn from the eye of the lever, when the latter is fully depressed, will be carried directly across the path of the needles, so as to insure the feeding of the yarn t0 the latter at the proper place.

Secured to the frame 49 is a plate 72, whic has at one end a segmental needle-guard 73, the latter being of inverted-U shape, so that the raised needles can pass between the inner and outer walls of the same, the outer wall of said needle-guard at the end which the needles approach in their movement being inclined, as shown in Fig. 2, and this inclined edge 74 being beveled, as shown in Figs. 2 and 7, so as to form a latch-turner for throwing down into their proper position any needle-latches which may have accidentally been raised and which would, unless thus depressed, interfere with the perfect or proper feeding of the yarn to their needles.

Secured to the inner wall of the needleguard 73 and extending part way around the circular series of needles, on the inner side of the same, is a yarn-detlector 75, preferably consisting simply of a bent wire or plate, this deiiector serving as a bearing for the idle yarns running from the yarn-guiding eyes of the elevated levers 6l, so that said idle yarns are directed in a course which will prevent them from becoming engaged with the needles.

One side of the frame 49 is provided with a plate 76, as shown in Figs. 1, 3, and 8, this plate carrying a rod or pin 77, which eX- tends under the rear arms of the thread-guiding levers 61 and serves as a stop for the downward movement of said rear arms of the levers under the action of the springs 7 8, whereby they are normally drawn downward. By this means contact of the rear ends of the levers 61 with the surface of the drum 47 is prevented, and the friction and'wear which would result from such contactare obviated.

The frame 49, with its thread-guiding levers and their appurtenances, can be swung backward on the trunnions 50, so as to carry the saidthread-guiding levers and their appurtenances away from the upper portion of the needle-cylinder in order to permit of the ready removal of said cylinder from the machine and the ready reinsertion of the same or the insertion of another cylinder in its place, this being necessary when the machine is used for producing striped tubes for the 4 legs of stockings and another machine is used for making the feet, as in such case it is preferable to transfer the needle-cylinder, with the work upon it, from one machine to the other rather than to cast off the work from the needles of the cylinder, as the latter course necessitates the running on of the stitches of the knitted tube upon the needles of the footing-machine.

When the arm 49 is depressed or occupies its normal positionthat is to say, with the thread -guiding levers and their appurtenances in operative relation with the needles of the needle-cylinder-said arm is supported by the seating of the projecting ends of the drum -shaft 46 in pockets in the opposite brackets or standards 51 and is locked in this position by means of a pivoted bolt 90,-hung to the under side of one of the side bars of the frame and engaging with a notch in the bracket 19, as shown in Fig. 3, the lever being held in this locked position by the action of a spring 91. The lever 90 is connected by a link 92 to aswinging arm 93, hung to the drum-shaft 46 and having two notches 94 and 95, each adapted for the reception of a pin 96, projecting from one of the brackets or standards 51, the notch 94 receiving said pin `when the frame 49 is depressed and the notch 95 receiving the pin when said frame is raised, as shown in Fig. 9, the arm V93 then serving to support the frame 49 in the elevated position, from which it cannot be moved until said arm is withdrawn by the action of the lever 90, so as to free the notch 95 from engagement with the pin 96. The arm 93 also aids in locking the frame 49 in the depressed position, since swinging movement of said arm 93 to a certain extent is necessary before the frame 49 can be lifted.

. We will now describe the means whereby the movement of the secondary pattern-drum 47 is controlled.

At one end of the primary drum 29 is a screw-thread 100 and at the other end of the drum is a series of openings 101, disposed in spiral form, said spiral having the same pitch as the screw-thread 100, and certain of these openings 101 receive pins or plugs 102, which can be readily applied or removed, so as to vary the disposition of the pins upon the drum, thus the pins may simply have stems fitting snugly in the openings 101, or said pins may have threaded stems and the openings may be internally threaded for the reception of the same.

Free to slide on the shaft 23, but splined thereto so as to have no rotating movement independently thereof, is a sleeve 103, which has at one end a bladeA or plate 104, engagingA to which is pivoted a pawl 106, adapted to be acted upon by the pins 102 of the drum 29 as the latter rotates, the longitudinal movement of the sleeve 103, under the inuence of the screw-thread 100, serving to maintain the pawl106 always in line with the spiral row of pins 102. The pawl 106 is mounted on the bracket 105, as shown in Fig. 10, so that it opposes a rigid resistance to the action of the pins 102 when the drum 29 is traveling forward or in the direction of the arrow, Fig. 2; but it can be tripped on the backward movement of the drum, a spring 107 permitting such tripping movement and restoring the pawl to its normal position after each such movement. The pawl 106 has two faces 109 and 110 for being acted upon by the pins 102 of the drum 29, the face 100 being the one first acted upon by the pin, as shown in Fig. 11, and being farther from the axis of the drum 29 than the face 110, these two faces being separated from each other by a space 111, upon which the pin 102 bears, as shown in Fig. 12, after it has moved the pawl by contact with the face 109 and before it imparts further movement to the pawl by contact with the face 110 on its next forward movement, as shown in Fig. 13. By reason of this construction each of the pins 102 imparts two successive movements to the pawl 10G, and hence to the bracket 105, sleeve 103, and shaft 23,three successive movements of the primary pattern-drum 29 being necessary in order to eifect a complete back-and-forth rocking of the shaft 23 for a purpose rendered apparent hereinafter.

A screw-stem 112 is adapted to a threaded opening in the bracket 105, so that it can be longitudinally adjusted in respect to said bracket and can be locked in position after adjustment by means of a nut 113, and the enlarged head 114 of this screw-stem fits between lugs 115, projecting upwardly from a cam-plate 116, (shown in Fig. 14,) said camplate being mounted so as to slide freely upon the projecting basediange of the annular camcylinder 13 and having a cam 117, which, as shown in Figsfand 15, acts upon a set-screw 118a carriedl by a lever 118, which is hung to saJcam-cylinder, said lever acting upon a 'pin 119, which projects from the draw-down cam 120 of the cam-cylinder and is adapted to an inclined slot 121 in the latter, as shown in Fig. 15, so that when the lower end of the lever 118 is lifted by the action of the cam 117 the draw-down cam 120 will be depressed in the cam-cylinder and will'draw down the needles of the needle-cylinder to such an extent as to form long stitches; but when the bar 116 is moved so as to free the set-screw 118a of the lever 118 from the influence of the cam 117 the draw-down cam 120 will be permitted to rise in the cam-cylinder and shorter stitches will be drawn by the needles of the needle-cylinder, thereby providing for the production of slack or stiff work, as desired, the point at which the character of the work changes being dependent upon the longitudinal relation of the cam 117 to the bracket 105 and this relation being changed as desired by the adjustment of the screw-stem 112.

A lug or projection 122 on the cam-bar 116 serves by contact with a pin 123 on the knockoff lever 3 to automatically stop the opera- 'tion of the machine when the production of understood on reference to Fig. 19, which represents an exaggerated view of a piece of the knitted web at and near the point where the yarn changes. On reference to this gure it will be observed that at the point where the change takes place both yarns are fed to the needles and form stitches for a few Wales, and in the absence of any provision for slacken-ing the wales at and near this point such formation of double stitches would in producing stiff work have a tendency to overload the needles and cause the stitches to eut or break. We therefore lengthen the stitches slightly both in the change course and in the courses preceding and following the same in that -portion of the web where a change of yarn is effected, as will be fully understood on reference to Fig. 19, this result being accomplished in the following manner:

In a suitable radial slot in the table o1' bed 1 of the machine is guided a bar 124, which may be termed a stitch-controlling bar and which is acted upon by a coiled spring 125, tending to move it forwardly, so that its forward end will project into the path of the cam-like periphery of the needle-cylinder carrier 6, which has the configuration shown in Figs. 4and 16 and hereinafter to be described, the bar 124 being normally retained in the retracted position, as shown in Figs. 3 and 4, by engagement of a pin 126 on said bar With a finger 127, which projects laterally from the arm 59 of the shaft 23, whereby the operation of the pattern-drum-actuating pawl 44 is controlled. The bar 124 has at its rear end a slot 129 for the reception of a guide-pin 130, and the forward end of the bar 124 can rise and fall as well as move forward and backward under the influence of the cams on the periphery of the cylinder-carrier 6. The bar 124is adapted to act upon a pin 131, depending from an arm 132, which projects from the lever 118, whereby the draw-down cam 120 will be depressed and will be retained in the depressed position as long as said bar 124 is held up, said draw-down cam resuming its normal position as soon as the bar 124 is allowed to drop.

IOO

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The flange of the needle-cylinder carrier' has a segmental peripheral portion 133, with s its ends rounded or beveled, as shown in Fig.

and 136, into which the forward end of the bar 124 can be projected by the action of the spring 125 when said bar is released from the control of the linger 127.

Owing to the fact that the pawl106 has two acting faces 109 110 at different distances from the axis of the primary pattern-drum 29, the action of a pin 102 of said patterndrum upon the face 109 of the pawl will not cause such movement of the arm 59 as to release the pin 56 of the lever 43 from the control of the bent end of said arm; but this movement is sufficient to raise the linger 127 out of engagement with the pin 126 of the bar 124. Hence the forward end of the latter isl projected by the spring 125 into the recess 135 in the periphery of the cylinder-carrier flange, whereby it can be acted upon by the cam 133, so as to be lifted, and thus operate the lever 11S and draw-down cam 120, so as to draw long stitches upon a certain number of needles of the cylinder, this number being that represented by the peripheral extent of the cam 133. As soon as the cam passes from under the bar 124 the latter drops into the recess 136, so as to permit of the rise of the draw-down cam and the resumption of the normal length of stitch in the fabric, the bar 124 being then pushed backward by the cam 134, but immediately entering the recess 135 again, owing to the fact that the nger 127 is raised and does not retain the bar 124 in the retracted position. On the next forward movement of the plug 102 of the primary pattern-drum 29 a further movement is imparted to the pawl 106, shaft 23, and arm 59, and the lever 43 is now released, so that its pawl 44 will engage with the ratchet-wheel 45 and move the same and the secondary patterndrum 47 to the extent of one tooth. This brings about a rearrangement of the yarnguide levers and a change of the yarn, and at the same time that this is being effected the cam 133 is again acting upon the bar 124, so as to depress the draw-down cam 120 and form longer stitches in the knitted web, the cam 133 being so timed in respect to the cam 41, which effects the movement of the secondary pattern-drum 47, that such long stitches will always be drawn at the time that the change in knitting-yarn is being effected. The bar 124 again drops into the recess136, is again pushed back by the camf134, and again moves forward, owing to the fact that the finger 127 of the arm 59 is still raised. Hence there will be still another lifting movement of the bar 124 by the cam 133 and the formation of another series of longer stitches in the course following that in which the change of yarn was effected; but meantime the primary pattern-drum 29 has been moved forward again to the extent of one tooth, and if no other change of yarn is to be effected the pawl 106 drops to the position shown in Figs. 2 and 11,

so as to permit the arm 59 to descend into..

position for again retaining the lever 43 and at the same time bring the finger 127 into position to engagewith the pin 126 of the bar 124, so as to retain the latter when it is again pushed back by the cam 134, the inherent elasticity of the linger 127 permitting it to yield upwardly as the pin is pushed under double-yarn stitches would draw through theA long stitches of said preceding course, so Invori der to effect these changes in the knitted as to prevent breaking of the yarn.

web, it is simply necessary to operate the re' `A tainer 127, so as to release the stitchbar 124 for one course only if the long stitches are to be drawn only in the course preceding the change course and for two courses only if the long stitches are to be drawn only in the change course and in the course preceding the same. The finger 127 may hecarried by an arm independent of the arm 59, but acted upon by the pins 102 of the drum 29.

Having thus described our invention, we claim and desire to secure by Letters Patent- 1. A pattern-drum having at one end a threaded portion and at the other end and longitudinally beyond said threaded portion a portion with projecting pins 'disposed in a spiral .course having a pitch similar to that of the threaded portion of the drum, substantially as specified.

2. Thecombination in a knitting-machine, of a secondary pattern-drum, its operating mechanism, a controller therefor, a primary pattern-drum having at one end a threaded portion and at the other end and longitudinally beyond the threaded portion a series of pins disposed in a spiral course corresponding as to pitch with the thread of the drum, means for rotating said primary pattern-drum, and a sleeve mounted so as to traverse parallel with the axis of said drum on a shaft connected to said controller, said sleeve having a portion for engaging with the thread ofthe IZO drum, and another portion for engaging with the pins of the same, substantially as specified.

3. The combination in a knitting-machine, of a secondary pattern-drum, its operating mechanism, a controller therefor, a primary pattern-drum having at one end a threaded portion, and at the other end and longitudinally beyond the threaded portion, spirallyarranged pins corresponding as to pitch with the thread of the drum, means for rotating said primary pattern-drum, a rock-shaft parallel with the axis of the Said drum and connected to the controller, and a sleeve splined on said shaft so that it can move longitudinally thereon but cannot turn independently thereof, said sleeve having a projection engaging with the threaded portion of the drum and anotherproj ection engaging with the pins of said drum, substantially as specified.

4. The combination of the pattern-drum and its pins,with means for rotating the drum, an arm to be acted on by said pins, said arm having a pivoted and spring-actuated pawl rigid against pressure in one direction but yielding to pressure in the opposite direction, substantially as specified.

5. The combination of a pattern-drum having projecting pins, means for rotating said drum, and pattern-drum-actuated mechanism having a pawl or iinger with two contactsurfaces for the action of said pins, one of said contact-surfaces being closer to the axis of rotation of the drum than the other, substantially as specified.

6. The combination of a pattern-drum having projecting pins, means for rotating said drum, and pattern-drum-actuated mechanism having a pawl or finger with two contactsurfaces for being acted upon by said pins, one of said contact-surfaces being closer to the axis of rotation of the drum than the other and the two contact-surfaces being separated from each other by a portion substantially concentric with the axis of rotation of the drum, substantially as specified.

7. The combination of a pattern-drum having a ratchet-wheel thereon, a lever having a pawl for engagement with said ratchet-wheel, means for operating said lever, a retaining pawl or detent, a lever carrying the same and having a portion for operating the actuatingpawl so as to eect the simultaneous withdrawal of both pawls, and a pivoted catcharm for retaining said detent-lever in the depressed position, substantially as specified.

8. The combination of the needles and needle-operating devices of a knitting-machine with yarn-guides movable into and out of yarn-feeding relation with the needles, movable blades for engaging the yarn from each of said feeding-guides and drawing it across the row of needles and means for operating said blades so as to cause their acting edges to swing from the outside to the inside of the row of needles, substantially as specified.

9. The combination of the needles and needle-operating devices of a knitting-machine, with yarn-guides movable into and out of yarn-feeding relation with the needles, and movable blades for engaging the yarns from said guides drawing the idle yarns away from the needles and the knitting-yarn into engagement with said needles and means for operating said blades so as to cause their acting edges to swing from the outside to the inside of the row of needles, substantially as specifled.

10. The combination ofthe needles and ncedle-operating devices of a knitting-machine, with yarn-guides lnovable into and out of yarn-feeding relation with the needles, the movable yarn-engaging blades, and provision for simultaneously operating said blades and the yarn-guides, whereby, as the yarn-guides change position, the acting edges of the blades will swing from the outside to the inside of the row of needles substantially as specified.

11. The combination of the rotary needlecylinder of a knitting-machine and its needles, with a segmental needle-guard oi; inverted-U shape forming a channel for the passage of the upper ends of the needles and having its outer wall inclined and presenting a beveled edge toward the approaching needles so as to serve as a latch-turner, substantially as specified.

l2. The combination in aknitting-machine, of a rotating needle-cylinder structure, acamcylinder with draw-down cam, and mechanism for operating said draw-down cam, said mechanism having as elements a cam on the rotating cylinder structure a bar movable into and out of the path ofsaid cam and means whereby the movement of said har is imparted'to the draw-down cam, substantially as v of a rotating needle-cylinder structure, a camcylinder having a movable draw-down cam and mechanism for operating said draw-down cam, said mechanism having as elements a lift-cam and a push-out cam on said rotating needle-cylinder structure, and a bar movable into range of said lift-cam and pushed out of range of the same by the push-cam, substantially as specified.

14. The combination in a knitting-machine, of arotating needle-cylinder structure, a camcylinder having a movable draw-down cam and operating mechanism therefor, said mechanism having as elements a lift-cam and a push-out cam on said rotating needle-cylinder structure, a sliding bar movable into and out of range of said cams, and a retainer for TIO holding said bar in the retracted position, sub- -tion with the needles, and mechanism for effecting two successive lengthening move= ments of said stitch-controlling cam, each during a partial turn of the needle-cylinder, one of said movements being simultaneous with the change in the position of the yarnguides and the other preceding said change, substantially as specified.

16. The combination in a knitting-machine, of arotating needle-cylinder, a cam structure having a movable stitch-controlling cam, a series of yarn-guides, provision for moving the same into and out of yarn-feeding relation with the needles, and mechanism for effecting lengthening movement of said stitch-controlling cam previous to the change in the position of the yarn-guides, substantially as specified.

17. The combination in a knittingmachine,

of a rotating needle-cylinder, a cam structure having a movable stitch-controlling cam, a series of yarn-guides, provision for moving the same into and out of yarn-feeding relation with the needles, and mechanism for effecting three successive lengthening movements of the stitch-controlling cam each during a partial rotation of said needle-cylinder, the first of said movements preceding the change in the position of the yarn-guides, the second being simultaneous with said change, and the third following said change, substantially as specified.

18. The combination in a knitting-machine, ofthe rotating needle-cylinder structnre,cams thereon, a vcam-cylinder having a movable draw-down cam, operating mechanism therefor having as one of its elements a bar movable into and out of range of the cams on the rotating needle-cylinder structure, a series of yarn-guides movable into and out of yarnfeeding relation with the needles, a patterndrum for operating said yarn-guides, operating mechanism for said drum, a controller having retainersfor holding out of action both of said drum-operating mechanism and the bar forming part of the operating mechanism for the draw-down cam, and means for moving said controller so as to release said parts, substantially as specified.

19. The combination in a knitting-machine, of the rotating needle-cylinder structure,cams thereon, a cam-cylinder having a movable the draw-down cam, and means for impart- Y ing a two-stage movement to said controller, the first stage of the movement releasing the bar forming part of the draw-down-cam mechanism, and the second movement releasing the mechanism for operating the patterndrum, substantially as specified.

20. The combination in a knitting-machine, of the needle-cylinder, its needles, and means for operating the same, a series of threadguides movable into and out of thread-guiding relation with the needles, a swinging'carrier for said thread-guides, and a swinging arm on said carrier adapted to engage with a projection on the fixed structure for retaining said carrier in inoperative position, substantially as specified.

2l. The combination in a knitting-machine, of a needle-cylinder, its needles and means for operating the same, with a series of threadguides movable into and out of thread-feeding relation with the needles, a swinging carrier for said thread-guides, a locking-bolt for securing the said carrier in its operative position, a swinging arm on the carrier for engagement with a projection on the xed structure in order to retain the swinging carrier in its inoperative position, and a connection between said swinging arm and the lockingbolt, substantially as specied.

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

ROBERT W. SCOTT. LOUIS N. D. WILLIAMS. HARRY SWINGLEHURST, JR. Witnesses:

STooKToN BATES, WM. ZUoKLnY.

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