US2138738A - Pattern drum control means - Google Patents

Description

Nov. 29, 1938. w, GROTHEY 2,138,738

PATTERN DRUM CONTROL MEANS Filed April 6-, 1937 5 Sheets-Sheet l INVENTOR IVAN W. GROTHEY BY HIS ATTORNEYS Nov. 29, 1938. w. GROTHEY PATTERN DRUM CONTROL MEANS 5 Sheets-Sheet 2 Filed April 6, 1937 INVENTQR IVAN \M GROTHEY BY HIS ATTORNEYS Nov. 29, 1938. w. GROTHEY PATTERN DRUM CONTROL MEANS Filed April 6, 1937 5 Sheets-Sheet 3 INVENTOR- IVAN w GROTHEY Tijlfi BY ms ATTORNEYS /00 l QC.

Nov. 29, 1938. I, w, GRQTHEY 2,138,738

PATTERN DRUM CONTROL MEANS Filed April 6, 1937 5 Sheets-Sheet 4 T5 c115. B9

INVENTOR IVAN W. GROTHEY BY HIS ATTORNEYS Nov. 29, 193%. w. GROTHEY PATTERN DRUM CONTROL MEANS Filed April 6, 1937 5 Sheets-Sheet 5 INVENTOR IVAN W. GROTHEY BY HIS ATTORNEYS Patented Nov. 29, 1938 UNITED STATES PATTERN DRUM CONTROL MEANS Ivan W. Grothey, Laconia, N. H., assignor to Scott 8; Williams, Incorporated, New York, .N. Y., a corporation of Massachusetts Application April 6, 1937, SerlalNo. 135,31'i

' 11 Claims.

This invention relates to circular knitting machines having means for forming embroidery patterns on the fabric by means of wrap or embroidery yarns during the knitting of the fabrics thereby and more particularly to means in a machine of the type described arranged for the knitting of stockings which provides, for changes in the yarns of which the body of the stocking is knit so as to produce stockings having horizontal stripes as well as wrap embroidery patterns extending walewise of the stocking and it is an object of this invention to provide an improved means for controlling the introduction and withdrawal of the yarns of which the stocking is knit so as to provide improved patterning possibilities as to the horizontal stripes. It is also an object of this invention to provide a pattern drum for controlling the yarns, the cutter and clamp therefor and the means for insuring the engagement of all the yarns by the needles. It is a further object of this invention to provide means for controlling the starting and stopping of the pattern drum and for returning the pattern drum to the same position for its initial operation in the knitting of each stocking.

In the drawings in which a preferred embodiment of this invention is illustrated,

Fig. l is a partial view in elevation of the head of a circular knitting machine of the Scott and Williams type equipped in accordance with this invention, parts being broken away to show other parts more clearly;

Fig. 2 is a plan view of the structure shown in Fig. 1 showing the body and wrap yarn finger, yarn pressers, cutter and clamp mechanism and part of their operating means;

Fig. 3 is a fragmentary view in elevation showing the means for pressing down the wrap yarns to prevent their being taken by the cutter and clamp mechanism;

Fig. 4 is a view in elevation of the pattern drum and related parts for controlling the insertion and withdrawal of the striping yarns, parts being broken away to show other parts more clearly;

Fig. 5 is a vertical sectional view of the structure of Fig. 4 taken as on line 5-5 of Fig. 4;

Fig. 6 is a fragmentary vertical sectional view taken as on line 6-6 of Fig. 5 and showing a detail of the means for lifting the wrap yarn presser at the time a yarn change is made by the pattern drum of Figs. 4 and 5;

Fig. 7 is a partial top plan view of the structure shown in Figs. 4 and 5; I

Figs. 8 and 9 are partial vertical sectional views taken as on lines 88 and 8-9, respectively, of Fi 7;

Fig. 10 is a view showing, developed in the plane of the drawings, asuitable arrangement of cams for the pattern drum of Figs. 4 and 5 for use in knitting a stocking striped as shown in Fig. 22;

Fig. 11 is a partial vertical sectional view of the pattern drum of Fig. 4 showing the pawl for operating the drum and the operating means for the pawl, the pawl being shown in operative condition;

Fig. 12 is a fragmentary view similar to Fig. 1111, the pawl being shown in inoperative condi- Figs. 13, 14 and are partial vertical sectional views of the pattern drum of Fig. 4 taken as on line i3-i3 of Fig. 4 and showing the controlling means for the pawl of Figs. 11 and 12, Fig. 13 showing the positions of the parts of the controlling means while the pawl operates; Fig. 14 showing the positions of the parts immediately after the pawl has been rendered inoperative; and Fig. 15 showing the positions of the parts immediately before they are operated to release the pawl for operation of the drum;

Figs. 16 and 17 are views in elevation, detached from the remainder of the mechanism, of parts shown in Figs. 13 to 15;

Fig. 18 is a vertical sectional view of the pattern drum of Fig. 4 showing in elevation the means for rotating the pattern drum to a predetermined starting position prior to the beginning of the horizontal striping in the knitting of each stocking;

Fig. 19 is a sectional view of a friction or braking means for preventing movement of the pattern drum in excess of the movement of the operating means shown in Fig. 18;

Fig. 20 is a fragmentary view in elevation showing the means operated by the pattern chain 'for operating the pawl controlling means to release the pawl for operation of the pattern drum;

Fig. 21 is a fragmentary plan view of links of the pattern chain showing the relation thereto of the lugs for operating the means of Fig. 20; and

Fig. 22 is a diagrammatic view showing in elevation a stocking knit by a machine equipped in accordance with this invention.

In the drawings the invention is shown in connection with a circular knitting machine having a dial for the knitting of stockings having a ribbed top and plain fabric foot and leg and provided with wrap yarn guides for wrapping selected needles with embroidery yarns to form embroidery patterns therein as shown in the patent to Grothey No. 2,053,192, issued Sept. 1, 1936. In the drawings which show only so much of the machine as is necessary to illustrate the application of this invention thereto parts of the upper portion of the knitting machine are shown comprising the bedplate B, the needle cylinder 260, dial D, the wrap yarn fingers 161, the body yarn fingers F F and F operated by push rods i8! from the main pattern drum and arranged to feed the yarn to the needles at the throat plate of the latch guard ring 000 which is pivotally mounted on the standard 00I in the usual manner. Associated with the needles and the yarn fingers is a cutter and clamp I18 operated from the main pattern drum (not shown) through a rod I11 connected to one arm of a bell crank lever 1 of this kind is a presser member I80 for insuring the taking of the body yarns by the needles which is pivotally supported on the pin I88 which supports the yarn fingers and is operated by a push rod I8I in the same manner as the yarn. fingers F F There is also provided a presser member I88 positioned between the throat plate and the cutter and clamp mechanism for holding the wrap yarns down on the needles to position them below the body yarn and insure their plating on the outside of the fabric. The member I80 is withdrawn during each yarn change as in its operative position it would prevent the body yarns being lifted to the cutter and clamp mechanism. The member I80 is pivotally mounted on a bracket I81 secured to the latch guard ring and operated from the main drum by a push rod I8I which is connected to a crank 80 fixed on an end of a shaft 8I supported in the standard "I. The shaft 8| forms the pivot for the latch guard ring 000 and at its other end is provided with a crank arm 82 to which is attached a plunger 83 positioned to engage beneath an end of the presser lever I80.

To operate the yarn fingers to form horizontal stripes in a stocking as knit there is provided an auxiliary pattern drum I00 rotatably mounted on a shaft I00 supported by bracket members I00 carried by the machine frame. The drum I00 has cams I00, I00", I00 and I00 thereon arranged to cooperate with a plurality of fingers IOI', IOI I0I and IN having projections I02 arranged to engage cams on the pattern drum I00 so that the fingers are operated thereby. These fingers are pivotally mounted on a pin I03 supported in a bracket arm I04 which is mounted on the shaft I03 and is held in fixed position by a link I04 which secures the upper end of the bracket arm I04 to the machine frame; The fingers IOI', IN", IN engage beneath pins I8I on the thrust rods I8I and are each held in engagement with the cams on the drum I00 by the weight of the parts and by the usual springs which draw down the yarn fingers so that when the cams are interrupted the fingers permit the thrust rods I8I to drop and the yarn fingers F 1",;6 to be lowered to introduce the yarns to the needles. When the fingers IOI', IOI and IN are raised by cams on the drum coming beneath the projections I02 on the fingers the thrust rods I8I are raised by the engagement of the fingers with the pins I8I and raise the yarn fingers to withdraw the yarns from the needles.

To operate the drum I00 to rotate the cams beneath the fingers IOI to IN, the drum is provided at one end thereof, the left end as shown in Figure 4, with a ratchet wheel I06, and a pawl I01, arranged to engage the wheel I08, is pivotally mounted on a lever I08 which pivots on the shaft I00. The lever I 08 is operated by means of a rod IIO having mounted thereon a roller 0- which contacts with a cam III fixed to rotate with a shaft H2. The rod no is slotted, as at m, to hold the roller positioned with respect to the cam I I I while permitting movement of the rod IIO by the cam. A

, spring II4, secured to the pawl I01 and to the lever I 08. biases the pawl'to a position inwhich it engages with the teeth of the ratchet wheel I08 and a spring IIO secured to the rod H0 and to a suitable fixed portion of the frame holds the rod with the roller 0' in engagement with thecam III. The shaft H2 is driven from a gear on the main drive shaft through gears H8, H1 and H0 in synchronism with the needle cylinder 200 so that the shaft II2 revolves once for each revolution of the needle cylinder causing the cam III and the rod IIO to be operated and to advance the pattern drum I00 one tooth of the ratchet wheel I06 for each revolution of the needle cylinder.

'is provided a lever I pivotally mounted on the pin I03 and having a tapered projection or finger I28 arranged to be engaged by a pin I 01 fixed in one end of the pawl I01. The lever I20 is also provided with a pin I20 at its lower end adapted to cooperate with a notch I 21 in a latching lever I21 which is pivotally mounted on a pin I28 secured in an extension of the bracket arm I 04. The lever I21 is biased to an upper position by a spring I23 secured to the end of the lever and to a pin I30 supported by the lever I20. The pin I20, once engaged in the notch I21, is held thereby until the lever I 21 is drawn down. To operate the lever I21 to release the pin I20- there is provided a lever I3I pivotally mounted on the pin I28 and operated by means of a Bowden wire I33- by lugs I33 on the pattern chain I34. The lever I3I is provided with an upwardly extending portion I3I on which is pivotally mounted a lever I32 having an arm'I32' arranged to be engaged with the projecting portion I21" of the lever I21 and an arm I31." curved as shown in Figures 13, 14 and 15 and engaging an adjustable stop I33 mounted on the lever I 20. A spring I34 is connected between the lever arm I32 and the pin I30 carried by the lever I20 and holds the lever arm I32 engaged with the stop I33.

To operate the Bowden wire I33 there is provided a lever I30 (Fig. 20) suitably mounted on the machine frame and carrying a block I30 which engages with lugs I33 on the pattern chain I34. A spring I 30 secured between the lever I30 and a portion of the machine frame biases the lever towards the pattern chain while a stop I30 projecting from the lever I30 so as to engage with the machine frame limits the inward movement of the lever I30 and block I30 towards the pattern chain. As shownin Figure 20 the lugs I33 engage under the block I30 and force the lever I30 outwardly against the action of the spring I30. Operation of the lever I30 and Bowden wire I33 by a lug I33 on the pattern chain I34 is arranged to draw the lever I3I downwardly against the action of a spring I38 secured between the free end of the lever HI and an arm I38 fixed on the pin I03.

{To prevent the pawl I01 operating the ratchet wheel I00 the drum I00 is provided with a pin or pins I40 placed in the drum in line with the finger I26 on the lever I20 sothat as the pawl racks the ratchet wheel and drum and brings a pin I40 beneath the finger I20 the lever I20 and finger I23 are moved outwardly and position the pin I20 in the notch I21 of the lever I21, the lever I21 being held in engagement with the pin I20 by the spring I20. When thus moved outwardly the'finger I 25 assumes a position which, because of the engagement of the finger I25 with the pin I01 on the pawl I01, prevents the pawl from engaging when the rod H is drawn down to engage the pawl with the following tooth on the ratchet wheel I to again rack the ratchet wheel I05 forward. This condition is shown in Figure 14, which shows the pawl I01 turned outwardly against the action of the spring I I4 as the pin I01 travels along the finger I20. During the movement of the lever I25 and finger I25 to the position of Fig. 14 by the pin I40 the pawl I01 is sufiiciently far along in its operation that it is not disengaged from the tooth of the ratchet wheel I05 with which it is then in engagement and the operating stroke of the pawl during which the lever I25 is moved outwardly is not interrupted. By the completion of the operating stroke of the pawl the pin I40 is moved past the finger I26 to a position, as shown in Figure 14, such that upon release of the pawl for further operation of the drum the pin 840 does not interfere with the return of the pawl to its operative position. The pins I40 may be placed so as to stop the drum after a single operation of the pawl advances the ratchet wheel one step or after a desired number of operations up to a full revolution of the ratchet wheel.

To release the pawl I01 for further operation of the ratchet wheel I00 the lever I32, plvoCed on the extension I3I of the lever I3i, must be brought to a position in which it will engage with the projection I21 of the lever I21 and the lever I3I operated by the pattern chain to draw down the lever I21 and release the lever I25. In order that the lever I32 may be thus operated there is a movement of the pattern chain to release the block I35 from the lug I33 and permit the lever I3I to be raised by the spring I38. As the lever I3I is raised the lever arm I32 bears against the back of the projection I21 and rotates the arm I32 of lever I32 away from the stop I33. The lever I3I is raised until the lever arm I32 clears the projection I21 and the spring I34 rotates the lever I32 to bring the arm I32 thereof against the stop I33. This rotation of the lever I32 brings the lever arm I32 thereof over the projection I21 on the lever I21 as shown in Figure 15 so that upon downward movement of the lever I3I on engagement of the block I35 by a lug I33 on the pattern chain I34 the lever I21 will be operated by the engagement of the lever arm I32 with the projection I21 lowering the lever I21 and permitting the spring I23 to rotate the lever I25 to release the pawl I01 for return to its operative position and to place the finger I25 on the lever I25 in position to be engaged by the next pin I40 on the pattern drum I00. The release of the block I35 by a lug I33 on the pattern chain need not be immediately followed by the operation of the lever I35 by a lug on the following pattern chain link as shown in Figure 21 as the lugs I33 need not be arranged on succeeding links but may be arranged in accordance with the pattern desired.

The cams on the drum I00 are arranged in accordance with the pattern desired and while the illustration shows three cam tracks, a, b and c for the control of yarn fingers F F F respectively, it will be understood that the invention is not limited to the'number of cam tracks shown but a greater or' less number of cam tracks and a greater or less number of yarn fingers may be used in accordance with the pattern desired. In the construction shown the arrangement is such that the projections I02 01 the levers IOI', III" and III-I are raised from the pattern drum by cams I00, I00 and I00 of the cam tracks a, b and 0, respectively, when it is desired to hold the corresponding yarn fingers out of action and are in engagement with the surface of the pattern drum during the periods in which the yarn'fingers are in action. Accordingly there are, as shown in Figure 10, cams which hold two of the yarn fingers outof action while the third yarn finger is positioned for feeding yarn to the needles. Thus, in Figure the yarn finger controlled by the cams I00 of the cam track a is operative while the yarn fingers controlled by the cams I00 and I00 of the cam tracks b and 0, respectively, are inoperative and the cams are so positioned that the racking movement of the pattern drum I00 which renders the yarn finger controlled by the cams I00 of the cam track a inoperative renders the yarn finger controlled by the cams I00 oi cam track b operative.

In the machine illustrated, at each yarn change it is necessary that the cutter and clamp be operated; that the presser I86, which guides the wrap yarns, be withdrawn momentarily during the period of yarn change; and that the presser I00 be lowered momentarily after the yarn finger presenting the new yarn has been lowered to in-, sure the new yarn being taken by the desired needle. For these operations there are provided on the pattern drum I00 additional cam tracks d,

and e having cams I00 and I00, respectively. The cams I00 are arranged to engage one arm of s. bell crank lever I5I pivotally mounted on the pin I03 which has its other arm connected by a rod I50 to that arm of bell crank lever I10 to which the rod I11 is connected thus establishing a connection to the cutter and clamp mechanism I16 through the bell crank lever I18, rod I and lever I16 for the operation of the cutter and clamp mechanism by the cams I00 at each yarn change controlled by the drum I00.

3 To operate the presser member I00 one of the cams I00 on the cam track d passes from beneath the projection I02 of the finger I0I each time the drum I00 effects a yarn change, freeing the finger I00 for movement towards the pattern drum I00 under the influence of a spring MI. The finger I00 engages above a pin IBI on the upper section of the associated telescoping thrust rod IOI (Fig. 8) and the downward movement of the finger I 0| draws down the upper portion of the telescoping thrust rod IOI against the action of a spring I8I which holds the rod extended and permits the presser member I00 to be drawn down by a spring I80 (Fig. 1) to push the newly presented yarn down to a position which insures the yarn being taken by the needles. The cams of cam track it, however, are arranged to again engage the extension I02 during the same racking movement of the drum I00 and raise the finger IIlI immediately after the finger is lowered so that the upper section of the thrust rod I M is again raised by the spring IIlI and the presser I80 maintained out of operation at all times except for the short time it engages the yarn to insure it being taken by the needles. Pivotally mounted on the pin I03 is a plate I52 supported from the finger I0I by an adjustable support I53 so that the plate I52 is lowered and raised with the arm IOI at each operation of a yarn finger to effect a yarn change. Pivotally mounted on the .plate I52 is a bell crank lever I54 having an arm I54 thereof projecting alongsidea push rod I8I. This push rod I8I is provided with a lug I8I against which the arm I54 of the bell cram. normally rests and beneath which the arm I60 engages upon the lowering of the plate I52 ty the movement of the arm IOI the bell crank lever I64 being operated by a spring I55 attached to the other arm I54 of the bell crank lever and to the plate I62 to draw thearm I 54* beneath the lug I8I'. With the arm I 54 drawn beneath the lug I8I when the plate I52 is lowered, the push rod III is raised when the plate I52 is raised by the movement of the arm IOI thus operating the crank 80, shaft 8i and crank 82 to draw down the plunger 83 and permit'spring 84 to withdraw the presser I86 for the period of the yarn change. The bell crank lever I54 is operated, almost immediately after raising the push rod Ill, to release the push rod and permit the usuaispring to operate the push rod to return the presser I86 to its operative position. For this operation of the bell crank lever I54 a bell crank lever I68 is pivotally mounted on the shaft I and has one arm I56 thereof positioned to engage the arm I54 of the bell crank lever I54 while the other arm I56 is positioned to be operated by a cam I51 fixed on the shaft II2, the cam I'I being positioned with respect to the adjustable pin I58 in the arm I56 so as to properly time the return of the presser I86 with respect to the operation of the yarn fingers.

In the selection of a pattern, such as shown in Figure 22, it is not always possible, or desirable, to have the pattern of such a design that'the pattern drum I00 will always be in the position for starting the striping of the next stocking when it makes its last operation in the knitting of a stocking. There is provided, therefore, a means for returning the drum I00 to a predetermined position after the completion of its operation in the patterning of each stocking which means may operate either during the knitting of the toe or in the knitting of the rib top but preferably during the knitting of the rib top of each stocking, to rotate the drum I00 to a.

predetermined starting position. This means comprises a pawl I 60 which engages with the teeth of a ratchet wheel I6I at the opposite end of the drum I00 from the ratchet wheel I06. The pawl I 60 is mounted tobe operated by a cam I62 fixed on the shaft II2 so that at each rotation of the shaft II2 the ratchet wheel I6I is advanced one tooth. The ratchet wheel I6I is provided with a long tooth, as at I6I' of such length that the movement of the pawl I60 by the cam I62 is insuflicient to cause the pawl to move off the tooth I6 I and upon return of the ratchet wheel to the position in which the pawl I60 rides on the tooth I8I further movement of the ratchet wheel I6I and the pattern drum ceases. To prevent operation of the drum I00 by the pawl I60 and ratchet wheel I6I at other times than when desired, a cam or guard plate I63 is mounted on the shaft I09 and is operated by a link I64 connected to an arm I64 fixed to a push rod I8I operated from the main pattern drum so that during the operation of the drum I00 to form the striped portion of the stocking and at all times except when the pawl I60 is to operate the drum I00 the cam I63 is positioned to engage a pin I60" on the pawl I60 and to prevent movement of the pawl I60 from operating the ratchet wheel I6I. During the knitting of the rib top or other portion of the stocking when it is desired to return the drum I00 to its starting position the cam I63 is shifted to the dotted line position shown in Figure 18, releasing the pawl I80 to engage with the ratchet wheel I6I for operation of the drum to the predetermined starting position and before operation of the drum I00 by the pawl I01, the cam I63 is returned to the position in which it engages with the pin I60 and prevents operation of the ratchet wheel I6I by the pawl I80. A plunger I80 mounted in an opening in a boss I04 on the bracket arm I04 and forced into engagement with an end of the drum I00 by a spring'I8I serves as a brake or drag on the movement of the drum by the pawls I01 and I60 and prevents movement of the drum in excess of movement of the pawls.

The stocking shown in Fig. 22 is knit, beginning at the rib top T and during the knitting of the top the pattern drum I00 is stepped around to its starting position. During this operation the thrust rods I8I controlling the yarn fingers for the striping yarns are engaged by cams on the main pattern drum and the yarn fingers held out of action independently of the cams on the pattern drum I00. Where the pattern drum I00 is arranged to controlthe body yarn finger so as to knit portions of the body yarn during the knitting of the stocking leg the cams on drum I00 will be arranged to permit the stepping of the drum to its starting position without interfering with the knitting of the rib top. Preferably the rib top is knit of a yarn supplied by a yarn finger not controlled by the pattern drum I00.

During the movement of the main pattern drum at the completion of the rib top T and the transfer of the dial loops to the cylinder needles for the knitting of the plain fabric of the leg L, the yarn of which the rib top is knit is withdrawn, the yarn of which the leg L is knit is inserted and all the thrust rods I8I are freed by the main pattern drum for control by the pattern drum I00. At the desired time for making stripes a movement of the pattern chain I34 brings a 113 I33 thereon into engagement with the lever I35, operating the lever I35, Bowden wire I33 and lever I3I to release the pawl for operation of the pattern drum I00. During the knitting of the leg L the pattern drum I00 is stopped and operated in accordance with the positioning of the pins I40 on the drum I00 and their relation to. the operation of the lever I35 by the lugs on the pattern chain I34 to produce the desired pattern. Such a pattern may be, as shown in Fig. 22, knit of contrasting yarns fed to the needles so as to form the narrow stripes s and s, the wide stripes s1 and the embroidery stripes or patterns s The pattern may be continued into the foot, the pattern drum I00 being held inactive during the knitting of the heel, and at the end of the pattern courses a pin I40 shifts the pawl I0! and lever I25 outwardly for engagement by the lever I21 and all the lugs I33 on the pattern chain I34 having passed, the drum I00 is held inactive during the knitting of the toe and until pawl I60 is released to return the drum I00 to its starting'position.

What is claimed is:--

1. In a circular knitting machine, a pattern drum, a pawl for operating said drum, means for operating said pawl to advance said drum, a lever for engaging said pawl to prevent operation of said drum'by said pawl, a latch for holding said lever with said pawl kept from operating said drum, pattern controlled means for operating said latch to release said lever to return said pawl for drum operation and means on said drum for operating said lever to prevent said pawl operating said drum.

2. In a circular knitting machine, a pattern drum for controlling yarn fingers, a pawl for op-.

erating said drum, means for operating said pawl to advance said drum, means controlling the operation of said pawl, pattern controlled means for operating said pawl controlling means to release said pawl for drum operation, means on said drum operating said controlling means to operate said pawl to stop operation of said drum and resetting means for rotating said drum to a predetermined position while operation by said pawl is prevented.

3. In a circular knitting machine, a pattern drum for controlling yarn fingers, a pawl for operating said drum, means for operating said pawl to advance said drum, means controlling the operation of said pawl, pattern controlled means for operating said pawl controlling means to release said pawl for drum operatic means on said drum operating said controlling means to operate said pawl to stop operation of said drum, resetting means for rotating said drum to a predetermined position while operation by said pawl is prevented and means for rendering said resetting means inoperative during the operation of said drum by said pawl.

4. In a circular knitting machine, a pattern drum, a pawl for operating said drum, means for operating said pawl to advance said drum, a lever for engaging said pawl to prevent said pawl operating said drum, means on said drum for engaging said lever to shift said pawl, latching means for holding said lever with said pawl kept from operating said drum, a pattern means and means operated by said pattern means for operating said latching means to release said lever to return said pawl for drum operation.

5. In a circular knitting machine, a pattern drum, a pawl for operating said drum, means for operating said pawl to advance said drum, a lever for engaging said pawl to prevent said pawl operating said drum, means on said drum for operating said lever to engage said pawl, latching means for holding said lever with said pawl kept from operating said drum, a pattern means and means operated by said pattern means for operating said latching means to release said lever to return said pawl for drum operation, said means being attachable in different positions on said drum to vary the position in which said drum is stopped.

6. In a circular lmitting machine, a pattern drum, yarn fingers controlled by said drum, a pawl for operating said drum, means for operating said pawl to advance said drum, a lever for engaging said pawl to prevent operation of said drum by said pawl, means on said drum for engaging said lever to shift said pawl, said means being attachable in different positions on said drum to vary the position in which said drum is stopped, latching means for holding said lever with said pawl kept from operating said drum, a pattern chain, means operated by said pattern chain for operating said latching means to release said lever to return said pawl to operate said drum and means for advancing said drum to a predetermined position with said pawl kept by said lever and latching means from operatin: said drum.

7. In a circular knitting machine, a pattern drum for controlling yarn fingers, a pawl ior operating said drum, means for operating said pawl to advance said drum, a lever for engaging said pawl to prevent operation-of said drum by said pawl, means on said drum for operating said lever to engage said pawl, latching means for holding said lever with said pawl kept from operating said drum, a pattern chain, a release lever, means operated bysaid pattern chain for operating said release lever and means pivotally mounted on said release lever for engaging said latching means to operate said latching means to release said lever to return said pawl for drum operation upon operation of said release lever.

8. In a circular knitting machine, a pattern drum for controlling yarn fingers, a pawl for operating said drum, means for operating said pawl to advance said drum, a lever for engaging said pawl to prevent operation of said drum by said pawl, means on said drum for operating said lever to engage said pawl, latching means for holding said lever with said pawl kept from operating said drum, a pattern chain, a release lever, means operated by said pattern chain for operating said release lever and means pivotally mounted on said release lever for engag g said latching means to operate said latching means to release said lever to return said pawl for drum operation upon operation of said release lever, said pivotally mounted means being disengaged from said latching means upon operation of said release lever.

9. In a circular knitting machine, a pattern drum for controlling yarn fingers, a pawlior operating said drum, means for operating said pawl to advance said drum, a lever for engaging said pawl to prevent operation of said drum by said pawl, means on said drum for operating said lever to engage said pawl, latching means for holding said lever with said pawl kept from operating said drum, a pattern chain, a release lever, means operated by said pattern chain for operating said release lever and means pivotally mounted on said release lever for engaging said latching means to operate said latching means to release said lever to return said pawl for drum operation upon operation of said release lever and means on said pawl-engaging lever engaging said pivotally mounted means to disengage said pivotally mounted means from said latching means upon operation of said release lever.

10. In a circular knitting machine arranged to wrap embroidery yarns about the needles, a pattern drum, means for operating said drum, yarn fingers, means operated by said drum for operating said yarn fingers to eiiect striping by yarn changing, means positioning the wrap yarns on the needles ior plating and means operated by said drum for withdrawing said yarn positioning means i'or-a short period at each operation oi said yarn fingers.

11. In a circular knitting machinearranged to wrap embroidery yarns about the needles, a pattern drum, means for operating said drum, yarn fingers for feeding the body yarns, means operated by said drum for operating said yarn fingers to eflect striping by yarn changing, means positioning the wrap yarns on the needles for plating, means for engaging the body yarns with the needles and means operated by said drum for withdrawing said wrap yarn positioning means during each yarn change and for operating said body yarn engaging means to engage the body yarn with the needles at each yarn

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