US2645106A

US2645106A - Warp knitting machine

Info

Publication number: US2645106A
Application number: US15320A
Authority: US
Inventors: Lambach Fritz
Original assignee: ROBERT REINER Inc
Current assignee: ROBERT REINER Inc
Priority date: 1948-03-17
Filing date: 1948-03-17
Publication date: 1953-07-14
Anticipated expiration: 1970-07-14

Description

July 14, 1953 Filed March 17, 1948 F. LAMBACH WARP KNITTING MACHINE 5 Sheets-Sheet l INVENTOR. FRITZ LAMBACH ATTORNEY.

July 14, 1953 I F. LAMBACH 2,645,106

WARP KNITTING MACHINE Filed March 17. 1948 s Sheets Sheet 2 INVENTOR. 88 FRITZ LAMBACH BYW ATTORNEY.

July 14, 1953 F. LAMBACH WARP KNITTING momma 5 Sheets-Sheet 3 Filed March 17. 1948 FRITZ LAMBACH INVENTOR.

ATTORNEY.

July 14, 1953 F. LAMBACH WARP KNITTING MACHINE s sheets-sheet 4 Filed March 17. 1948 INVENTOR FRITZ LAMBACH BY /-'z- ATTORNEY.

y 1953 F. LAMBACH 2,645,106

WARP KNITTING MACHINE Filed March 17, 1948 5 Sheets-Sheet 5 INVENTOR. FRITZ LAMBACH ATTORNEY.

Patented July 14, 1953 UNITED STATES PATENT. OFFICE WAR-P KNITTING MACHINE Fritz Lambach, Tenafly, N. J assignor to Robert Reiner, Inc.,' Weehawken, N. J.

Application March 17, 1948, Serial No. 15,320

' 24 Claims.

1 The present invention relates to textile machines, and more particularly to warp knitting machines. I An object of the present invention is to provide a warp knitting machine with a take-up mechanism wherein the take-up roller isreadilyaccessible for removal of the finished knitted fabric.

Another object of the invention is .to equip a warpknitting machine of the typehaving two banks of needles with an automatic take-up mechanism for taking up the fabric knitted by the knitting implements of the warp knitting machine.

A further object of the invention is to improve upon the construction of take-up devices for warp knitting machines as now ordinarily made. With the above and other objects of the invention in view, the invention consists in the novel construction, arrangement and combination of various devices, elements and parts, as set forth such robust construction and are arranged in' such a manner that the frame is sufficiently strong .to carry the various elements, parts and devices of the warp knitting machine. In apreferred embodiment, each girt is made'of four

side plates

36, 38, 40, 42 (see Figs. 1 and 2) welded together so as to form a hollow body Of rectangular cross-section; each girt is closed at its ends by head plates 44 welded to the-side plates of the girt and provided with threaded bores ca- 7 pable of receiving screws for attaching the girts in the claims hereof, an embodiment of the same being described in the specification and being illustrated in the accompanying drawings, forming part of this specification, wherein:

Fig. 1 is a more or less diagrammatical front elevational view of a warp knitting machine according to the invention,

Fig. 2 is a sectional view of the warp knitting machine shown in Fig. 1 taken on line 2-2 of Fig. 1,

Fig. 3 is a fragmentary sectional view of the warp knitting machine similar to the sectional view shown in Fig. 2, however, in an enlarged scale, V

Fig. 4 is a vertical sectional view of the warp knitting machine taken on line '4--4 of Fig. 3,

Fig. 5 is a sectional view taken o'nline 5*5' of Fig.4, v

Fig. 6 is'a fragmentary, sectional'vi'ew similar to the sectionalview shown in Fig.3, wherein liowever, the take-up roller is disengaged from the takeup drive proper, and I 1 Fig. 7 is a fragmentary perspective view illustrating a connection of the take-up roller with a shaft journalled in a bearing of the support barrying the take-up roller.

The drawings illustrate only those parts of a warp knitting machine, which are necessary for the understanding of the invention g In the drawings '20 generally indicates the frame of a so-called Simplex warp knitting machine having two banks of warpguides 22, two banks of sinkers 24 and two banks of needles 26 extending longitudinally 'of' the machine;

totheendwalls'2B,30. V 'As best shown in Figs. 1 and 4,;a shaft 46 journalled in suitable bearings of the end walls '28 and. may be rotated by means of a motor 48 through the medium of a suitable belt-drive 50. Said shaft 46 represents a cam shaft carrying a plurality of cams (not shown in the drawings) pertaining to various actuating devicesof the warp knitting machine. A crank 52 rigidly connected with the end of said camshaft v 46 projecting from the end wall ,28 is pivotally connected at 54. with the upper end Of a connecting rod 56, the lower end of which is pivotally connected at 53 to one end of an arm loosely arranged on a shaft 62 rotatably arranged in a suitable bearingof the end wall 28. The eccentric arrangement of the pivotal connection 54 between the crank 52 and the upper end of the connecting rod 56 is adjustable. Likewise, the length of-saidconnecting rod 56 .is adjustable. As best shown in Fig-5, said arm 60 carries a spring-loaded pawl 64 arranged for engagement with teeth of a ratchet wheel fifikeyed to the shaft 62. Therefore, when, during the operation of the warp knitting machine, the connecting rod 55 is reciprocated by means of the crank 52 driven by thecam shaft 46,- the ratchet wheel 66 will be advanced step by step'as often'as the spring-loaded pawl 64 may find a tooth 0f the ratchet wheel 66 for cooperation therewith.

The ratchet wheel 66 is held in its position by means of a spring-loaded holding pawl 68 swingably mounted on a bolt 10 secured to the end wall 28.

the frame of As best shown in Figs. 3 and 4, two arms 12 and I4 constituting supporting means capable of receiving above mentioned take-up roller 34 are rigidly connected with a shaft 16 journalled in suitable bearings of the

end walls

28 and 30. A shaft I8 (see Figs. 4 and 7) is rotatably but axially immovably arranged in the lower end of the arm 12. A gear 80 keyed to the end of said shaft 18 projecting from the right side of the arm I2 (as viewed in Figs. 4 and 7) is in mesh with a pinion 82 keyed to the shaft 62 of the take-up drive described above, when the supporting arm I2 is in the position shown in Fig. 3.

As best shown in Figs. 4 and '7, a carrying block 84 having a bore for receiving the end of the shaft I8 projecting from the left side of'the arm I2 is positively coupled with said shaft 18 by means of a pin 86 passing through registering bores of the block 84 and the shaft 18. Said carrying block 84 is provided with a recess 88 capable of receiving a square bar 90 which, in turn. may be passed through a corresponding square aperture of the take-up roller 34.

In a similar manner; a carrying block 92 is secured to a shaft 94 rotatably but axially immovably arranged in a bearing of the supporting arm 14 at the other side of the machine. Said carrying block 92 has a recess 96 capable of receiving the other end of said square bar 96 carrying the take-up roller 34.

The square bar 90 may be held in the recesses 88 and 96 of the

carrying blocks

84 and 92 by means of latches 98 swingably mounted on the

blocks

84 and 92. As best shown in Fig. 7, for

example, the latch 98 swingably mounted at I whereby the square bar 90 carrying the take-up roller 34 is held in engagement with the carrying blocks 94 and 92.

If it is desired to remove the take-up roller 34 from the supporting arms 12, 14, the thumbscrews I04 are loosened so that the latches 98 may be swung into such a position wherein the square bar 90 may be disengaged from the recesses 88 and 96 of the

carrying blocks

84 and 92.

When the machine is in operation, the fabric I06 knitted by the knitting

implements

22, 24, 28 of themachine is wound on above described takeup roller 34, which at this time is positively coupled with the pinion 82 of the take-up drive through the medium of the gear 80 keyed to the shaft 18 positively coupled with the carrying block 84 engaged with the square bar 99'carrying the take-up roller 34. The take-up roller 34 is prevented from rotation. in clockwise direction (as viewed in Fig. 3) owing to the engagement of the spring-loaded holding pawl 68 with a tooth of the ratchet wheel 66. The fabric I06 is held under tension by means of a tensioning bar I68- carried by arms I I0, I I2 rigidly secured to a shaft I I4 journalled in bearings of the

end walls

28 and 30. Furthermore, an arm II6 isrigidly secured to said shaft I I4. The movement of said arm I I6 is limited by stop screws II8, I20. The arm is provided with a series of holes I22. One end of a tensioning spring I24 may be selectively connected with one hole of said series of holes I22. The other end of said tensioning spring I24 is connected to a bolt I26 secured to the end wall 28. Thus, said spring I24 tends to urge the arm H3 in clockwise direction (as viewed in Fig. 3) whereby the arms III) and H2 secured to the shaft I I4 likewise tend to move in clockwise direction so as to hold the fabric I06 trained around the tensioning bar I08 under tension.

Furthermore, as best shown in Figs. 3, i and 5, a lever I28.is rigidly secure dto the shaft II4 so as to participate in oscillating movements of the latter. One end of an adjustable connecting rod I30 is pivoted at I32 to said lever I23; the other end of said connecting rod I30 is pivoted at 34 to an arm I36 of a double-armed lever I38 loosely arranged on the shaft 62. As best shown in Fig. 5,'the other arm I40 of said double-armed lever I38 is provided with a controlling surface I42 which may cooperate with the spring-loaded actuating pawl 64 swingably mounted on the arm 68 oscillated by above-described take-up drive. When the double-armed lever I38 and the controlling surface I42 are in the position shown in full lines in Fig. 5, the controlling surface I42 is in such a position relative to the actuating pawl 64 that the latter may find one tooth of the ratchet wheel-66 foradvancing same one step upon a rocking of the arm 60 in clockwise direction. If, however, during the operation of the warp knitting machine, the tension inthe fabric I06 increases and the tensioning bar I08 (see Fig. 3) rigidly connected with the shaft H4 is moved against the action of the spring I24 in counterclockwise direction, the lever I28 also rigidly secured to the shaft I I4 is, likewise, swung in counter-clockwise direction so as to reach the position I28 shown in dash and dot lines in Fig.5. This movement of thelever I28 into the position I28 in turn results in a movement of the doublearmed lever I38 into the position I33 shown in dash and dot lines in Fig. 5. When the doublearmed lever is in said position I38, the controlling surface I42 lifts the actuating pawl 64 into the position 64 shown in dash and dot lines in Fig. 5. Now, when the arm 60 is rocked in clockwise direction, the pawl 64 cannot find a tooth of the ratchet wheel 66, so that the latter will not be advanced. As soon as the normal tension in the fabric I06 has been restored and the tensioning rod I08 reaches again the position shown in Fig. 3 by the action of the spring I24, the controlling surface I42 will reach the position shown in full lines in Fig. 5, so that during the next rocking movement of the arm 60 the actuating pawl 64 may again advance the ratchetwheel 86 through one step.

On the other hand, if the tension in the fabric I06 should decrease below the normal degree, the tensioning rod I08 will be swung in clockwise direction by the action of the spring I24 from the position shown in Fig. 3, so thatthe controlling surface I42 will be swung to the same extent from the position shown in full lines'in Fig. 5 in counter-clockwise direction. Su'ch'a displacement of the controlling surface I42 permits the engagement of the actuating pawl 64 with such a tooth or the ratchet wheel 66 that the latter will be advanced through two steps, for example. As soon as by such an increased advancement of the ratchet wheel 66 driving the take-up roller 34 through the medium of the pinion 82 and gear the normaltension in the fabric I06 has been restored, the tensioning rod I08 will again reach the position shown in Fig. 3 and the controlling surface I42 will be returned into the position shown in full lines in Fig. 5.

-As will be readily understood from above, the

take-up drive for rotating the take-up roller through the medium of the coupled pinion 82 and gear 80 is equipped with .means responsiveto the tension in the fabric.

In accordance with the invention, the position of the take-up roller extending longitudinally of the machine along a longitudinal side thereof may be changed by the following positioning means: As best shown in Figs. 3, 4 and 6, a Worm gear I44 rigidly secured to the shaft I6 rigidly connected with the movable arms I2 of the support carrying the, take-up roller 34 is in mesh with a worm I46 rotatably and axially immovably arranged in suitable bearings I48 mounted on. the end wall 28.

' means movably mounted on the frame .ofthe Preferably, said worm I46 is of the self-locking wherein the gear- 80 is coupled with the pinion '82 of the take-up drive, is limited by an abutment of adjustable stop screws I56 arranged on the arms I2 and I4 against a girt 32 as best shown in Fig. 3.

When the take-up roller 34 .is fully loaded, the warp knitting machine is stopped; Thereupon,.the support.'I2,- I4 carrying the take-up roller 34 may be swung by means of the positioning mechanism I44I50 fromthe position shown in Fig. 3 into the position shown in Fig. 6, wherein the gear 80 is disengaged from the pinion 82. In said position, the take-up roller 34 with the fabric Wound thereon is substantially outside the frame of the warp knitting machine and is readily accessible to the operator of the machine. whereupon the full take-up roller may be removed from the swingable support I2, I4 and may be replaced by an empty one.

After insertion of the empty take-up roller 34 into the support I2, I4, the latter may be returned by means of the positioning mechanism I 44l into the position shown in Fig. 3 wherein the gear 80 is engaged with the pinion 82 of the take-up drive. The free end of the fabric is attached to the take-up roller 34 in any suitable manner and the warp knitting machine is restarted. During the subsequent operation of the machine, the fabric is again wound on the take-up roller 34 by means of above-described drive.

I have described a preferred embodiment of my invention, but it is understood that numerous changes and omissions may be madewithout departing from the spirit and scope of the invention set forth in the appended claims.

What I claim is:

1. In a warp knitting machine, the combination of: a frame comprising a pair of connected end walls spaced from each other, supporting means movably mounted on the frame of the machine, a take-up roller rotatably arranged on said movable supporting means for rotation about a fixed axis, said take-up roller extending longitudinally of the machine and beingnormally Thus, the fabric may be readily cut.

in the'space betweensaid end walls of the frame.

said supporting means being movableso as to bring said take-up roller from its normal position' in the space between said end walls into a temporary position at least partially outside the frame of the machine, a positioning mechanism associated with said movable supporting means for bringing same intoalternative positions, and a take-up drive associated with said take-up roller for positively rotating same. I

2. In a warp knitting machine, the combination of: a'frame comprising a pair of connected ends walls spaced from each other, supporting machine, atake-up roller rotatably arranged on said movable supporting means, said take-up roller extending longitudinally of the machine and being normally in the space between said end walls of theframe, said supporting means being movable so as to bring said take-up roller from its normal position in the space between .said end walls into a temporary position at least partially outside the frame of the machine, a positioning mechanismassociated with said movable supporting means for bringing same into alternative positions, a take-up drive arranged on the frame of the machine, and disengageable coupling means associated with said take-up drive and said take-up roller, said coupling means beingv in positively engaged condition when said take-up roller is in its normal position and being in disengaged condition when said take-up roller is" in a-temporarypositiong 3. In a warp knitting machine, the combination of a take-up drive arrangedon-jtheknitting machine, a first coupling element'included in said take up drive, a support movably arranged onjthe knitting machine, a second coupling element rotatably mountedon. said support and capable of positive engagement with said first'coupling element-said support being capable of receiving a take- 11p roller for positive connection thereof with said second coupling element, and a positioning mechanism associated with said movable support for bringing same into alternative-posi-.

tions and thus bringing these'cond coupling element into and out of engagement with said first coupling element. Y

i. In a warp knitting machine, the combination of a take-up drive arranged on the knitting machine, a first coupling element included in said take-up drive, a support movably arranged on the knitting machine, a second coupling element roalternative positions and thus bringing the second coupling element into and out of engagement with said first coupling element. I

5. In a warp knitting machine, the combinationof a take-up drive arranged on the knitting machine, a pinion included in said take-up drive, f a support movably arranged on the knitting machine, a gear rotatably mounted on'said support,

said support being capable of receiving a take-up roller for positive connection thereof with said gear, and a positioning mechanism associated with said movable support for bringing same into alternative positions and thus bringing said gear into and out of mesh with said pinion. 1

6. In a warp knitting machine having knitting implements for knitting a fabric, the combination of: a frame comprising a pair of connected end walls spaced from each other, supporting means movably mounted on the frame of the machine, a take-up roller rotatably arranged on said movable supporting means, said take-up roller extending longitudinally of the machine and being normally in the space between said end walls of the frame for receiving fabric knitted by the knitting implements of the machine, a take-up drive arranged on the frame of the machine, disengageable coupling means associated with said take-up drive and said take-up roller, said coupling means being in positively engaged condition when said take-up roller is in its normal position whereby said take-up drive may rotate said take-up roller, said take-up drive including means for intermittently rotating said take-up roller, means responsive to the tension in the fabric associated with said take-up drive for adjusting the degree of its intermittent rotating of the take-up roller, said supporting means being movable so as to bring said take-up roller from its normal position into a temporary position at least partially outside the frame of the machine wherein said coupling means are in disengaged condition, and a positioning mechanism associated with said movable supporting means for bringing same into alternative positions.

7. In a warp knitting machine, the combination of a frame comprisinga pair of connected end walls spaced from eachother, supporting means movably mounted 'on' the frame of the machine, a take-up roller rotatably arranged on said movable supporting means, said take-up roller extending longitudinally of the machine and being normally in the space between said end walls of the frame, said supporting means being movable so as to bring said take-up roller from its normal position in the space between said end walls into a temporary position at least partially outside the frame of the machine, a positioning mechanism associated with said movable supporting means for bringing same into alternative positions, holding means associated with said supporting means for holding same in a predetermined position, and a take-up drive associated with said take-up roller for positively rotating same.

8. In a warp knitting machine, the combination of a frame comprising a pair of connected end walls spaced from each other, supporting means swingably mounted on the frame of the machine, a take-up roller rotatably arranged on said swingable supporting means, said take-up roller extending longitudinally of the machine and being normally in the space between said end walls of the frame, said supporting means being swingable so as to bring said take-up roller from its normal position in the space between said end walls into a temporary position at least partially outside the frame of the machine, a-positioning mechanism associated with said swingable supporting means for bringing same into alternative positions, and a take-up drive associated with said take-up roller for positively rotating same, said take-up drive and said supporting means being separate units, and said supporting means being movable away from and toward said take-up drive.

9. In a warp knitting machine, the combination of: a take-up drive arranged on the knitting machine, a first coupling element included in said take-up drive, a support swingably mounted 8 on the knitting machine, a second coupling element rotatably mounted on said support, said support being capable of receiving a take-up roller for positive connection thereof with said second coupling element, and a positioning mechanism associated with said swingable support for bringing same into alternative positions and thus bringing the second coupling element into' and out of engagement with said first coupling element. I

10. In a warp knitting machine, the combination of: a take-up drive arranged on the knitting machine, a first coupling element included in said take-up drive, a support swingably mounted on the frame of the machine, a second coupling element rotatably mounted on said support and capable of positive engagement with said first coupling element, a take-up roller rotatably and exchangeably arranged on said support, disengageable connecting means associated with said take-up roller and said second coupling element for positively connecting same with each other, and a positioning mechanism associated with said swingable support for bringing same into alternative positions and thus bringing the second coupling element into and out of engagement with said first coupling element.

11. In a warp knitting machine, the combination of: a take-up drive arranged on the knitting machine, a first coupling element included in said take-up drive, a support swingably mounted on the knitting machine, a second coupling element rotatably mounted on said support, said support being capable of receiving a take-up roller for positive connection thereof withsaid second coupling element, and a manual positioning mechanism associated with said swingable support for bringing same into alternative positions and thus bringing the second coupling element into and out of engagement with said first coupling element.

12. In a warp knitting machine, the combination of: a take-up drive arranged on the knitting machine, a first coupling element included in said take-up drive, a support swingably mounted on the knitting machine, a second coupling element rotatably mounted on said support and capable of positive engagement with said first coupling element, said support being capable of receiving a take-up roller for positive connection thereof with said second coupling element, a positioning mechanism associated with said swingable support for bringing same into alternative positions and thus bringing the second coupling element into and out of engagement with said first coupling element, and holding means associated with said swingable support for holding same in a position set by said positioning means.

13. In a warp knitting machine as claimed in claim 11, said positioning mechanism including a Worm and a worm gear operatively engaged with each other, said worm gear being connected to said swingable support, and actuating means connected to said worm gear for actuating same.

14. In a warp knitting machine as claimed in claim 11, said positioning mechanism including a worm and a worm gear operatively engaged with each other, said worm gear being connected to said swingable support, actuating means connected to said worm gear for actuating same, an index wheel positively coupled with said positioning mechanism, and a loaded element arranged for cooperation with said index wheel so as to hold same and the support in a position set by said positioning mechanism.

' 15. In a warp knittingmachine, the combination ofz-a take-up drive arranged on the,knitting machine, afirst coupling element included i Said take-up drive,'a support swingably. mounted on the knitting machine, a second coupling element rotatably mounted on said support, said support being capable of receiving a take-up roller for positive connection thereof with said second coupling element, a positioning mechanism {associated with said swingable support for bringing same into alternative positions and thus bringing the second coupling element into and out of engagement with said first coupling element, and limiting means associated with said swingable support .for limiting. its, extreme position. wherein said coupling elements are engaged with each other. 1

16. In a warp knitting machine, the combination of: a frame comprising a pair of connected end walls spaced from each other, supporting means movably mounted on the frame of the. machine, a take-up roller rotatably arranged on said movable supporting means, said take-up roller extending longitudinally of themachine and being normally in the space between said end walls of the frame, said supporting means being movable so as to bring said take-up roller from its normal position in the space between said end walls into a temporary position at least partially outside the frame of the machine, a positioning mechanism associated with said movable supporting means for bringing same into alternative positions, a take-up drive associated with said take-up roller for rotating same, and means associated with said take-up drive and saidtake-up roller for maintaining a predetermined'ratio of revolution between same during the operation of the machine.

17. In a warp knitting machine, the combination of: a frame comprising a pair of connected end walls spaced from each other, supporting means movably mounted on the frame of the machine, a take-up roller rotatably arranged on said movable supporting means, said take-up roller extending longitudinally of the machine and being normally in the space between said end walls of the frame, said supporting means being movable so as to bring said take-up roller from its normal position in the space between said end walls into a temporary position at least partially outside the frame of the machine, a positioning mechanism associated with said movable supporting means for bringing same into alternative positions, a take-up drive arranged on the frame of the machine, disengageable coupling means associated with said take-up drive and said take-up roller, said coupling means being in engaged condition when said take-up roller is in its normal position and being in disengaged condition when said take-up roller is in a temporary position, and said coupling means being arranged for maintaining a predetermined ratio of revolution between same when they are in engaged condition during the operation of the machine.

18. In a Warp knitting machine, the combination of: a take-up drive arranged on the knitting machine, a first coupling element included in said take-up drive, a support movably arranged on the knitting machine, a second coupling element rotatably mounted on said support, said support being capable of receiving a take-up roller for positive connection thereof with said second coupling element, and a positioning mechanism associated with said movable support for bringing sameinto alternative positions and thus bringing-the second coupling element into and outof engagement with said first coupling element,=and said firstandsecond coupling ele ments being arranged for maintaining a predetermined ratio of revolution between samewhen the are in engagement with each other. durin the operationof the machine.

' 19. In a ,warpknittingmachine having knitting implements for knitting a fabric, the combi nation of: a frame comprising a pair ofconnected end walls spaced from each'other, supporting meansmovably mounted on the frame of the machine, a take-up roller rotatably arranged on said movablesupporting means, said take-sup rollerextendi-ng longitudinally. of the machine and being normally in the spacebetweensaid end walls of the frame for receiving fabricknitted by the'knitting implements of the 'machine, atake-up drive arranged on the frame of the machine, disengageable coupling means associated with said take-up drive and said takeup roller, said coupling meansbeing in engaged condition when said take-up roller is in its normal position whereby .said' take-up drive may rotate said takeeup roll er, said coupling means being arranged for maintaining a predetermined ratio of revolution between same when they are in engaged condition during the operation of the machine,said take-up drive including means for intermittently rotating said take-up roller, means responsiveto the tension in the fabric associated with said take-up drive for adjusting the degree of its intermittent rotating of the takes up roller, said supporting means being movable so as to bring said take-up roller i-rom its'normal position into a temporary position at least partially outside the frame of the machine wherein said coupling means are in disengaged condition, and a positioning mechanism associated with said movable supporting means for bringing the same into alternative positions.

20. In a warpknitting-machine, the combination of: a frame comprising a pair of connected end walls spaced from each other, supporting meansmovably mounted on the frame of the machine, a take-up roller rotatably arranged on said movable supporting means, said take-up roller extending longitudinally of the machine and being normally in the space between said end walls of the frame, said supporting means being movable so as to bring said take-up roller from its normal position in the space between said end walls into a temporary position at least partially outside the frame of the machine, a positioning mechanism associated with said movable supporting means for bringing same into alternative positions, holding means associated with said supporting means for holding same in a predetermined position, a take-up drive associated with said take-up roller for rotating same, and means associated with said take-up drive and said take-up roller for maintaining a predetermined ratio of revolution between same during the operation of the machine.

21. In a warp knitting machine, the combination of: a frame comprising a pair of connected end walls spaced from each other, supporting means swingably mounted on the frame of the machine, a take-up roller rotatably arranged on said swingable supporting means, said take-up roller extending longitudinall of the machine and being normally in the space between said end Walls of the frame, said supporting means being swingable so as to bring said take-up roller from its normal position in the space between said end walls into a temporary position at least partially outside the frame of the machine, a positioning mechanism associated with said swingable supporting means for bringing same into alternative positions, a take-up drive associated with said take-up roller for rotating same, and means associated with said take-up drive and said take-up roller for maintaining a predetermined ratio of revolution between same during the operation of the machine. a

22. In a warp knitting machine, the combination of: a take-up drive arranged on the knitting machine, a first coupling element included in said take-up drive, a support swingably mounted on the knitting machine, a second coupling element rotatably mounted on said support, said support being capable of receiving a take-up roller for positive connection thereof with said second coupling element, a positioning mechanism associated with said swingable support for bringing same into alternative positions and thus bringing the second coupling element into and out of engagement with said first coupling element, said first and second coupling elements being arranged for maintaining a predetermined ratio of revolution between same when they are in engagement with each other during the operation of the machine, and holding means associated with said swingable support for holding same in a position set by said positioning means.

23. In a warp knitting machine, the combination of: a frame comprising a pair of connected end walls spaced from each other, a bank of needles extending longitudinally of the machine, supporting means movably mounted on the frame of the machine, a take-up roller rotatably arranged on said movable supporting means, said take-up roller extending longitudinally of the machine and being normally in the space between said end walls of the frame and below the level of said bank of needles, said supporting means being movable so as to bring said take-up roller from its normal position in the space between said end walls into a temporary position at least partially outside the frame of the machine, a positioning mechanism associated with said movable supporting means for bringingsame into alternative positions, and a take-up drive associated with said take-up roller for positively rotating same.

24. In a warp knitting machine, the combination of a frame comprising a pair of connected end walls spaced from each other, a bank of needles extending longitudinally of the machine, supporting means movably mounted on the frame of the machine, a take-up roller rotatably arranged on said movable supporting means for rotation about a fixed axis, said take-up roller extending longitudinally of the machine and being normall in the space between said end walls of the frame and below the level of said bank of needles, said supporting means being movable so as to bring said take-up roller from its normal position in the space between said end walls into a temporary position at least partially outside the frame of the machine, a positioning mechanism associated with said movable supporting means for bringing same into alternative positions, and a take-up drive associated with said takeup roller for positively rotating same.

FRITZ LAMBACH.

References Cited in the file of this patent UNITED STATES PATENTS Great Britain of 1855