US2095133A

US2095133A - Knitting machine

Info

Publication number: US2095133A
Application number: US6275A
Authority: US
Inventors: Holtz Abraham
Original assignee: Sadinoff & Wendroff Inc
Current assignee: Sadinoff & Wendroff Inc
Priority date: 1935-02-13
Filing date: 1935-02-13
Publication date: 1937-10-05
Anticipated expiration: 1954-10-05

Description

oct. 5, 1937.

A. HOL-rz 2,095,133

.KNITTING MACHINE Filed Feb. 13, 1955 5 Sheets-Sheet l ATTORNEYS' Q5/9,9149@ /L/m rz l BY t Oct. 5, `1937. A. HoLTZ 2,095,133

KNITTING MACHINE Filed Feb. 15, 1935 5 Sheets-Sheet 2 ATTORNEYSl Oct. 5, 1937. A. HoLTZ 2,095,133

KNITT ING MACHINE Filed Feb. 15, 1935 5 Sheets-Sheet,5

fog f zNvENToR. Heen/MM H04 'TZ ATTORNEYS Oct. 5, 1937. A HOL-rz y 2,095,133

KNITTING MACHINE Filed Feb. 13, 19u-3.5 5 Sheets-Sheet 4 /AZZ INVENTOR. Heen/QM Z BY /QM ATTORNEYS Oct. 5, 1937. A- HOL-rz KNITTING MACHINE:

5 Sheets-Sheet` 5 Filed Febv 13, 1935 ATTORNEYS Patented oct.Y s, 1937 KNITTING MACHINE f Abraham Holtz, New York, N. Y., assignor to Sadinoi & Wendroff, Inc., New York, N.'Y., a corporation of New York Application February 13, 1935, Serial No. 6,275

12 Claims.

The presentinvention relates to improvements in knitting machines and it particularly relates to improvements in the jacquard mechanisms associated with knitting machines. Y

Although the invention of the present application has a broad application to knitting machines generally, it will be specifically described in con- 1 nection with its application to knitting machines of the nat type, which may be Vconveniently utilized for the knitting Vof curtains.

In machines of the above character it has been possible to knit various predetermined designs by the use of a jacquard mechanism consisting of an endless chain, the various links of which are providedY with a plurality of'actuating members for controlling Vthe thread-guiding elements of the machine.,r Said actuating members are arranged on the chain in conformity with the particular design to be made and, as the chain is intermittently advanced, in the direction of its length, Vsaid actuating members are successively brought into rocatory bars which carry "saidthread-'guidingY elements.

position to` actuate the usual recip- By suitable mechanism theY chain is moved,V after each operation of the knitting Vmachine to cause said actuating members to engage one or more of the corresponding bar or Vbars so as to shift the same to position the thread-guiding elements properly thereon relative to the needle Y bar of the machine to cause the formation of certainV stitches i design.

'Heretofore the jacquardchains, the entire constitutingY apart of ,the complete length of vwhich are employed in the formation of one repeat of the complete design, have each Y number of actuating ,membersfor the thread the use, in'many instances, of exguiding elements. i

Moreover, the variety of designs which may be obtained is quite Vlimited by the diliicultiesV of mechanical construction, and by theV increased complication of the machinery necessary for more Vintricate and varied Yfabric constructions. f

Among the objects ofthe present invention are to provide an'improvedjacquard mechanismY for knitting machines of the character above described which will enable relative simplification i of the mechanical structure with lessened cost in maintenance in operation and which at' the 'same time will enable a greatly increased variety and range of lations.

designs by relatively simple manipu- (cl. afs-ss) Another Yobject is to provide'Y an improved knitting machine for curtains which will enable the production of a wide variety of designs there* upon with the employment of relatively compact simple machinery. Y A

Other objects will appear during the course of the followingspecication. Y l

In accordancewith theVV present invention, an operating mechanism is provided for the jacquard chain which will permit of a considerable reduc- 10 tion inthe length of said chain, thereby eectingV an economy of material and space, and facilitating the assembly lof the chain and the positioning of the actuating members thereon required to form any particular design.

To the end that this may be accomplished, the operating mechanism for the jacquard is designed to reverse the direction of movement ofthe same at predetermined intervals which may be uniform or varied, depending upon the design being formed. By thus intermittently reversing the movement of the jacquard chain, as distinguished from the customary ymovement thereof always in the same direction, many of the actuating members for the thread-guiding elements may beY 25 used repeatedly, during the formation of Vone repeat ofY the design, to Ymake symmetrical or repeat portions thereof. Y Y

Y In the preferred form of the present invention theV reversing mechanism `preferably includes a controlling cam and a Vreverse control pattern chain, Vwhich control the main Yjacquard lchain so that such reversing may take placeat predetermined intervals,` or continuously asmay be desired. 1 1 V Y The inventiveVV idea involved is capable of receiving a variety of mechanical expressions, oneof which, for purpose Yoi? illustration,fis shown in the accompanying drawings, in Whichz- Y "Figurer 1 is a fragmentary front elevation of one -end of aY knitting machineof known construction, illustrating the reversingY patternmechanism of the `present invention applied thereto from the line I--l of Fig. 2. i

FigureZ is an elevationl taken at right angles to Figurel and substantially from the line 2,-2 thereof, showing a part of the mechanism utilized to .reverse the direction of movement oflthe jacquard chain. Y Y Figure 3 is a transverse'- sectional view onthe line 3--3Y of Figure 2 uponVA an enlarged scale. l

Figure 4 is an enlargedelevational view from the line 4 4 of Fig. 1, partly-in section, illustrating the aforesaid reversing mechanism and the control device therefor, said mechanism be- 55 ing shown in position just after its operation in reversing the direction of movement of the jacquard chain.

Figure 5 is a side sectional view upon the line 5 5 of Fig. 4.

Figure 6 is a fragmentary side elevational view upon an enlarged scalev on the line 6 6 of Fig. 1.

Figure 7 is a side sectional view taken on the line -`i of Fig. 6, and v Figures 8 and 9 are fragmentary side elevational views similar to Fig. 4 illustrating other embodiments.

In the illustration of the present invention, only so much of a knitting machine of known construction is shown as will enable those skilled in the art to obtain a complete understanding of the application of the instant invention thereto.

Referring to Figs. 1 and 2 a at bed knitting machine is provided with a frame I0 which carries a needle bar diagrammatically indicated at il, which extends entirely across the machine. The needles of the machine are carried, as schematically indicated at I2.

Operated in conjunction with the needles of the machine and adapted to reciprocate transversely across the needle bed, are the thread or yarn guides I3, which are provided with the collars I4 fixed by the set-screws I5, on the reciprocatory bars I5. These reciprocatory bars are supported in slots or recesses Il', in the plate I3, which is bolted at I9 on the frame i0 of the machine.

As these bars I6 are intermittently shifted back and forth by the jacquard mechanism, they will cause the thread guides I3 to guide different threads to the various needles which'will result in the formation of the pattern.

Each of the bars I 6 (see Fig. l) is provided with the end contact plates 20, which are adapted to be actuated by the pins or jacquard extensions 2I. The pins 2l are carried by the links 22 of the jacquard chain and are arranged so as to project different distances and to cause varied reciprocating movements of the needle bars I6.

The jacquard chain 22-22 (see Fig. l) rides upon and is advanced by the square or polygonal sprocket element 23, which is rotatably mounted on the upper end of the reciprocatory arm or holder 24. The reciprocatoryV holder 2li is pivotally mounted at 25 upon the Xed arm 25 eX- tending out from the frame of the machine. The arm. 2S is reciprocated by the link 2l which pivotally connected to the gear wheel 29 at the combination serving as a crank. The gear wheel 2i) is driven by the shaft 3l of the main mechanism of the machine.

As best shown in Fig. 6 each of the links 22 is provided with outset forward arms 3E and rearwardly extending inset arms 33 at the ends thereof, which arms are pivotally connected at 3@ by the pivot bars 35. The transverse mei bers 3% of said links each carry the pins 2i as indicated at 31.

The transverse element 36 of the link 2E is preferably of sufficient width to carry a number of pins 2l which will cooperate with the needle bars it.

The Vsprocket wheel or carrier 23, as shown in Fig. 6, is rigidly connected to the shaft 38', which bears in the sleeve member 39 carried on the upper end of the reciprocating arm 2li. To the shaft 38 at the left side of the bear g sleeve 39 l is pinned the ratchet wheel 4U, as indicated at 4I, which causes forward movement of the jacquard chain 22-22.

The reverse ratchet rides loosely upon the shaft 38 and is bolted as indicated at 43 to the gear or pinion if-i. The gear lid. meshes with the gear 45, Xed to the shaft 4S. The shaft 46 bears in the sleeve 4l below and offset from the bearing sleeve 39.

The sleeve lll is provided with a base flange 41a by which it is bolted to the arm 2li at filo. The gear i8 drives the pinion 49 fixed on the end of the shaft 38 through the intermediate gear 50 which is rotatably mounted at 5I in an arm 52 projecting outwardly from the bearing sleeve di.

The gear train llle5 and iS--O-i will cause the ratchet wheel i2 to drive the sprocket 2S in the opposite direction from the ratchet lill and reverse movement of the chain 22-22.

As appears from Fig. 1, upon each reciprocation of the arm 24 the ratchet 40 will be advanced one-quarter turn by the pawl member to, the lower end of which is provided with the inturned catch or tooth Si cooperating with the teeth 62 of the ratchet iii).

The detent rod G3 (see Fig. l) is pivotally mounted at it upon the frame extension i8 and is pressed upwardly by the roller 65a on the right arm 65 of the lever 56 which is pivotally mounted at til upon the reciprocatory arm 2li. The left end of said arm GS is depressed by the coil spring 68, as indicated at GS. The other end of the coil spring G3 is connected at 'i0 to the lower portion of the reciprocating arm or lever 24.

As the ratchet il@ moves forwardly upon each reciprocation of the arm 24, the teeth 6I of the pawl ESG will slide rearwardly until it passes beyond the upper right tooth G2 of the ratchet. Then as the ratchet if? is swung backwardly upon the return movement cf the reciprocatory arm 2li, the tooth i5! will catch said upper right tooth 82 and willvadvance the ratchet il?) one-quarter turn, advancing the chain so that the next set of pins 2l are in position to actuate the thread carrier bars IS, through the contact plates 2o.

The detent rod acts to hold the ratchet l in each position (shown in Fig. 1) after it has been advanced one-quarter turn by the pawl 6o.

The pawl E@ for the jacquard chain ratchet lli), l

as shown in Figs. 2 and 3, is received in the collar 'H and is adjustably fixed therein by the setscrew l2. The collar is provided with a sleeve member 'F3 which slides upon the rod 'l and is pressed against the face 'l5 of the arm 76 by the coil spring i7. The coil spring 'I'I reacts at its opposite end against the washer 78. The tension on the spring is maintained by the nut lg which ts on the threaded end ile of the rod lli. The arm i6 is pivotally mounted at 92 on the rod 74.

The end of the rod 'il is xed at 8| in the boss 2 ofthe bracket 83. The bracket 83 is bolted at 34 to the vertical extension 65 from the frame plate i8. The forward arm B3 of the bracket 83 is bolted as indicated at 8l (see Fig. l) to the arm it which. carries the pin 89 serving as a bottom rest or stop for the jacquard pawl 58. The arm S6 is provided with an arcuate enlargement Si? having the slot di in which the bolt 81 is fitted, enabling convenient adjustment of the position of the arm 'EG and the pin 5S. The pin 89 will prevent said pawl @il from dropping below its proper position to enab-le the tooth 6i to engage the next ratchet tooth 62 upon forward movement of the arm 24.

The reversal of movement of the jacquard chain '22-22 is caused by a shifting of the jacquard pawl 60 fromY engagement with the teeth 62 of the ratchet 40 toengagement with the teeth 93 of the ratchet 42 (seeFig. 6). The forward movement of the ratchet 42 by the paw160 will then drive the shaft 38 in a reverse'direction through the

gear train

44, 45, 48, 49 and 50.

, This shifting'of the pawl from'the ratchet 40 tothe ratchet 42 is accomplished through the mechanism bestfshown in Figs. 1, 2, 4 and 5.

.The gear 29, asV shown in Figs. 1 and k2, meshes with the gear |90 on the shaft IOI, said shaft I||| being provided with the bearings IGZ-|02 and extending across the plate I8 Y of theY machine frame.

To the end of the shaftl I| is connected the cam |03 which cooperates with the follower roller the 'cam |03 and the roller |04 the pawls ||8 and.

YI|2 in the base '|I0 of the clevis |II.

The upper outsetV portion |01 of the bar |05 is provided with the slot |98, into which projects the arm |99 adjustably mounted by the set-screw I I is mounted on the rod I |3 projecting from the side of the machine by the set-screw I I4. The rod |09 is provided'with the nuts or contact pieces I I5, which maintain the rod in position in the slot |88 during the reciprocatory movement.

To the upper outset portion |01 of the bar |05 is connected the bearing,` mount |I6 in which the pawl rod I|1 is pivotally mounted. The rod! |1 (see Figs. 1 andl 2) ,carries the pawls I'IV and |36, which are pressed in contact with the ratchet wheels ||9 'and `|31 by the spring |20. Y

The pawl I3 may be set by a mechanism (not shown) to advance `the wheel ||9 one or two teeth |2| for each reciprocation, while the pawl advances the ratchet |31 one tooth |2|a.

Referring to Figs; 2, 4 .and 5 the ratchet I I9 is pinned at |22 to the shaft |23, as is also the collar |24 of the sprocket |25 at*|26. YThe ratchet ||9 will turnthe shaft |23 in the direction |21, upon actuation by the pawl I I8 shown in Figs.' 1 and 2, and the shaft |23 will rotate the sprocket wheel |25. The pattern chain |28 will mesh withthe teeth |29 on the sprocket |25 and be continuously advanced upon rotation of the shaft I 23.

As best shown in Fig. 5 the ratchet wheel |31,

The ratchetf|31` is shown provided with one .tooth for every two Vteeth of the ratchet II9, but,

The clevis if desired, it may be provided with the same number of teeth. The reciprocation of the element |05 carrying the pawls I I8 and |36 is sufficient to advance the ratchet I 31 one tooth and the ratchet IIS one or two teeth for each. revolution of the cam |03 and reciprocation of the follower bar |05.

The ratchet |31 is provided with the detent 44 having a boss |45 cooperating with the recesses |46 in the Yside of the ratchet |31, the lower end of the detent being mounted at I 41 upon the support rod I I3. Y

The bell crank. lever |65 is pivotally mounted at |66 upon the extension |61 from the frame of the machine. The other arm |68 ofthe bell crank lever |66 carries the adjustable pin |69 the end |10 of which is adapted to contact the boss 1I on the sleeve 13 (see Fig. 3) and move the pawl rod 60 so that the tooth 6| thereof will ride upon the ratchet 42 instead of the ratchet 40 to reverseY the jacquard chain 22-22.

The reversal will obviously only take place while the follower |51 is riding over the lobes |49 of the cam |48 and the lobes |49 will only elevate the roller I5! after a predetermined number of revolutions ofthe shafts 3| and |8| and recipro- It is obvious that the cam tude of the stroke of the arm |05 and the pawl ||8 may be readily changedf In Vthe knitting operation it is desirable at predetermined intervals to prevent operation of the reversing mechanism and/or to delay operation ofthe reversing mechanismrand this is conveniently accomplished by causing disengagement of the pawl |36 and the ratchet |31 during a predetermined or desired number of reciprccations of the arm 24.

To accomplish this reversal the pattern chain |28 (as best shown in Fig. 4) may be caused to carry a series of Contact plates |8I,v|62, |82@ of.

different or the same shapes and forms, and at different intervals, which plates are continuously advanced with the advancement vof the chain |28 upon vertical reciprocation of the arm |05.

When these plates turn around the sprocket l2 E, f

they contact with the adjustable bar |83 adjustably connected at |8311 Vto the L-snaped rod |84.

Fig. 2.

In operation therefore, as the main shafts ll and 3| are driven the arm 24 will be continuously reciprocated, causing advancement of the jacquard chain 22-22, and a reciprocatory movement of the thread guide H3 connected to the bar I6, resulting in the formation of a predetermined pattern for each position of the pins 2| of the jacquard chain 22-22.

With each of said reciprocations (due to the cooperation of the cam HB3 and follower |04 upon reciprocation of the arm I B5) the ratchets iii and |37 will be advanced by the reciprocating pawls H6 and |36, causing an advance of the pattern chain |28, and the reversing cam |48.

The reversing cam |48 will, at predetermined intervals, elevate the follower roller i5! (as shown in Fig. 4) upon the lobes |49, which through the linkage 62 and bell crank lever M5 will cause a shifting of the pawl 66 from the forward ratchet 4i! to the reverse ratchet 42 of Fig. 6.

The interval between said reversals will be controlled and varied by the contact plates IBI, |32, ESM upon the pattern chain |28 (see Fig. 4) which will for predetermined intervals maintain the pawl |36 out of Contact with the ratchet |37.

In this manner by relatively short jacquard chain 22-22 it is possible to obtain a very wide variety of designs, the variety of designs being capable of almost infinite variation by control of the reversal cams |48 and the positioning of the Contact plates |8|, |82, |82a on the reversal pattern chain |28.

Moreover, the arrangement shown permits a very ready control and adjustment of the jacquard chain, which may be accurately determined v without undue diiculty to determine the pattern.

The jacquard chain 22-22, the pattern chain |23 and cam |48 may be almost readily coordinated to give a predetermined pattern.

As shown in Fig. 4 the contact plates |8| and |82 are of different shape and form, but if desired the plates may all be of the same type, character and shape. IIhe plates I3! and |82a of Figs. 1 and 4 are adapted to keep the pawl |36 out of cooperation with the reversing ratchet |3'l for a considerable period of time, while the plate |52 is adapted to merely keep the pawl I3| out of cooperation with the ratchet |31 for two relatively short successive periods.

The embodiment of Fig. 8 shows an alternative construction to Fig. 4 in which similarly functioning parts are indicated by the same numerals primed.

According to this embodiment the plates ISI are caused to contact directly with the pawl |36 instead of through an intermediate lever arrangement, as shown in Fig. 4 and intermittently to hold the pawl |36' out of engagement with the ratchet wheel |31.

Fig. 9 shows still another modification similar to Fig. 4 in which similarly functioning parts are indicated by the same numerals provided with a superior In Fig. 9 the pattern reversing chain 282 carries a series of pins |8|2 which cooperate with the L-member |832 to actuate the arm |842 which is pivotally mounted at H32. The arm is provided with a forward extension 200, the forward end of which is provided with a pin |902 which is designed to move the pawl |362 out of engagement with the teeth |372 during predetermined intervals.

What is claimed is:

1. In a fiat knitting machine for knitting Curtains of the type having'a plurality of rows of thread guiding elements, transverse reciprocable bars carrying said elements, one for each row, contact plates on the ends of said bars to be actuated, an endless jacquard chain, the links of which are provided with a series of spaced pins to contact with said plates and cause actuation of said bars and elements, whereby a predetermined pattern is formed, sprocket means carrying said jacquardl chain, ratchet means driving said sprocket means, pawl means carried by said machine engaging and advancing said ratchet means tol drive said jacquard chain, a reciprocating lever carrying said sprocket means and crank means reciprocating said lever to cause said pins to contact with and actuate said bars at one end of the stroke and to cause said pawl means to advance said ratchet means at the other end of the stroke; the combination therewith of a reversing mechanism ior said jacquard chain including two reversing ratchet devices, two reversing pawl means corresponding with said ratchet devices, a reciprocating carrier actuated during operation to reciprocate said pawls and thereby advance said reversing ratchet devices, a cam driven by one of said reversing ratchet devices, a lever follower actuated by said cam, said rst mentioned ratchet means provided with double ratchet wheels arranged side by side, one being directly connected to said first mentioned sprocket means and the other being connected to said sprocket means by a reversing gearing train, said lever follower being connected to said rst mentioned pawl means to shift it from one ratchet wheel to the other ratchet wheel, said second reversing ratchet device driving a second sprocket, a reverse pattern chain carried by said second sprocket, a` plurality of contact elements carried by said reverse chain, said contact elements serving to move said first reversing pawl means out of engagement with said rst cam-actuating reversing ratchet device, to render said reversing mechanism inoperative at spaced intervals.

2. Ina flat bed knitting machine, movable yarn guides, pattern mechanism formed of a plurality of bar members, the length of said pattern mechanism representing substantially one-half of a symmetrical design in the finished fabric, a plul rality of pins carried by each of said bar members to actuate said guides to control the throw or the yarn, means to actuate the pattern mechanism in one direction throughout its length to produce one-half of the design, means for reversing the movement of the pattern mechanism throughout its length to complete the design, including a reciprocating pawl driven by the machine, a ratchet driven by the pawl, a cam driven by the ratchet and a lever arrangement actuated by the cam, and means for periodically rendering said reversing mechanism inoperative, including a device for disengaging said pawl from said ratchet.

3. In a flat bed knitting machine, movable yarn guides, pattern mechanism formed of a plurality of bar members, the length of said pattern mechanism representing a portion less than the whole of a symmetrical design in the finished fabric, a plurality of pins carried by each of said bar memlnoname `:bers'to actuatesaid guides to control the throw of the yarn,'m`eans to actuateV the pattern mechanism in one direction to produce said portionof fabric being knitted, a mechanism for operating said! element in accordance with the design to be formed, means to repeatedly move said mechanism in one direction during the formationvof a part of said design, means toreverse the direction j lof movement of said mechanism tothereby control the'formation of another. part of saiddesign,

including a reciprocating pawl drivenby the ma'- cliine, a ratchet driven by the pawl, a cam driven by the ratchet anda lever arrangement actuated by the cam, and control means for disengaging i said pawl including a pattern chain.

A5. In a fiat bed knitting machine, a threadguiding element operable in conjunction with the needle bar' ofthe machine to form a design on a fabricbeing knittedvga jacquard mechanism including an endless element movable in opposite directions along its length to control the operation of saidthread-guiding element, andmeans operable at predetermined intervals to reverse the directionY ci movement of said endless element to thereby control they formation of different parts Vof said design, said. last mentioned means including a single pawl, a forward drive ratchet for said element, a reverse drive ratchet, and a pawl shifting mechanism to shift the pawl from one ratchet to the other.

6. In a hat bedrknitting machine, thread-guiding elements operable in conjunction with the needle bar of the machine to form a design on a fabric being knitted, a jacquard chain movable in opposite directions and including a series of actuating members for said thread-guiding elements arranged on said chain in conformity with Y the design tobe produced, Vmeans to reverse the movement of said chain including a reciprocating pawl, a ratchet driven by said pawl, a cam driven by said ratchet and a lever arrangement driven by said cam and a pattern device to periodically disengage said pawl. Y

7.Y In a flat knitting machine for knitting curtains having a plurality of rows of thread guiding elements, transverse reciprocable bars carrying said elements, one for each row, contact members on the ends of said bars to be actuated, an endless jacquard chain, the links of which are providedwith a series of spaced pins to contact with said members and cause actuation of Vsaid bars and elements, whereby a predetermined pattern is formed, sprocket means carrying said jacquard chain, ratchet means driving said sprocket means,

pawl means-carried by said machine engaging and advancing said ratchet means to drive said jacquard chain, a reciprocating lever carrying said sprocket means and crankmeans recipro- Y -of the stroke;

Apostte-direction, one ratchetrbeing directly con- Y vnected to the sprocket and the other ratchet be- Y ing connected to the sprocket by an intermediate yreverse Vgearingi connection and means to shift said pawl means from one sprocket to the other.k

8. In a flat knitting machine for knitting curtains having a plurality of rows of thread guiding elements, transverse reciprocable bars carryingl said elements, one for each. row, contact memberson the ends of said bars to be actuated,

an endless jacquard chain; the links of which are .provided with a series of spaced pins to contact with said members and cause actuation of said Abars. and elements, whereby a predetermined pattern isA formed, sprocket means carrying said jacquard chain, ratchet means driving said sprocket means,pawl meansrcarried by said machine engagingV and advancing said ratchet means to drive said jacquard chain, a reciprocating lever carrying said sprocket means and crank means reciprocating said lever to causesaid i pins to contactwith and actuate said bars at one end'of the stroke Vand to cause said pawl means to advance said Vratchet means at the other end said ratchet means being connected to drive said sprocket means forwardly and reversely, means actuated by said'machine to operate said pawl meansrto cause reversal of the ratchet means and additional means operated by the machine to render such last mentioned means inoperative at predetermined intervals; said additional means including a reciprocating pawl, a ratchet driven by said pawl and means Vperiodically to disengage said pawl from Y tains having a plurality of rows of thread guiding elements, transverse reciprocable bars carrying said elementsjone for each row, contact members on the ends of said bars to be actuated, an endless jacquard chain, the links of which are provided With a series of spaced Vpins to contact with said members and cause actuation of said bars and elements, whereby a predetermined pattern is formed, sprocket means carrying said jacquard chain, ratchet means driving said sprocket means, pawl means carried by said machine engaging and advancing( said ratchet means to drive said jacquard chain, a reciprocating lever carrying said sprocket means and crank means reciprocating said lever to cause said pins to contact with and actuate said bars at one end of the stroke and to cause said pawl means to advance said ratchet means at the other end of the stroke; said ratchet means being connected to Ydrive said sprocket means forwardly and reversei ly, means actuated by said machine to operate said pawl means to cause reversal of the ratchet means and additional means operated by the machine to render such last mentioned means inoperative at predetermined intervals, said last mentioned means including a pattern chain and said previously mentioned means including a cam, a ratchet actuating said cam, a pawl actuating said ratchet and a connection from the machine actuating said pawl substantially in synchronisvm with the movement of said recipro- Y cating lever, said pattern chain serving to disen. gage said last mentionedv pawl from said last mentioned ratchetat predetermined intervals.

10. In a at knitting machine for knitting curtains having a plurality of rows of thread guiding elements, transverse reciprocable bars carrying said elements, one for each row, contact members on the ends of said bars to be actuated,

Vjacquard chain,

an endless jacquard chain, the links of which are provided with a series of spaced pins to contact with said members and cause actuation of said bars and elements, whereby a predetermined pattern is formed, sprocket means carrying said ratchet means driving said sprocket means, a single pawl carried by said machine engaging and advancing said ratchet means to drive said jacquard chain, a recprocating lever carrying said sprocket means and crank means reciprocating said lever to cause said pins to contact with and actuate said bars at one end of the stroke and to cause said pawl means to advance said ratchet means at the other end of the stroke; said ratchet means including two ratchets positioned side by side, one connected to the sprocket means to drive the same directly and the other connected with the sprocket means to drive said sprocket reversely, and means to shift said pawl laterally from one ratchet to the other,

11. In a flat knitting machine for knitting curtains having a plurality of rows of thread guiding elements, transverse reciprocable bars carrying said elements, one for each row, contact members on the ends of said bars to be actuated, an endless jacquard chain, the links of which are provided with a series of spaced pins to contact with said members and cause actuation of said bars and elements, whereby a predetermined pattern is formed, sprocket means carrying said jacquard chain, ratchet means driving said sprocket means, pavvl means carried by said machine ensame directly and the other connected with the sprocket means to drive said sprocket reversely, and means to shift said pavvl means from one sprocket to the other, said last mentioned means being actuated by a cam, a ratchet actuating said cam, a pawl actuating said ratchet and a connec- 12'0 tion from the machine operated in phase with said crank means to actuate said pawl.

12. The construction set forth in claim 11 ln which the machine is provided with means to cause a disengagement of said last mentioned pavvl from said last mentioned ratchet during predetermined periods of operation.

ABRAHAM HOLTZ.