USRE18074E - weinrub - Google Patents

Description

y 1931- H. WEINRUB Re. 18,074

CONTROL FOR KNITTING MACHINES Original Filed Jan. 7, 1930 2 Sheets-Sheet 1 fix I o I! I I I I H. I I m Y I a n a (II v I g I! a N 2\ uuo J a a Q ATTORNEY y 1931. H. WEINRUB Re. 18,074

CONTROL FOR KNITTING MACHINES Original F iled Jan. 7, 1930 2 Sheets-Sheet 2 HI NIH gin i!!! I9 v M" '-p J 4i;

=- E OWH L g s T f 1 1 s Reissued May 19, 1931 PATENT" OFFICE UNITED STATES HARRY WEINRUB, OF NEW YORK, N. Y.

con-moi. son KNITTING acnmns Original No. 1,791,989, dated February 10, 1931, Serial No.

419,032, filed January 7, 1930. Application for reissue filed March 9, 1931. Serial No. 521,321.

My invention relates to the control bar links carryin the pins which in turn control the actual posltioning of the bars of a knitting machine and produce the desired knitted pattern and it is my object to produce control means by the use of which more elaborate and complicated patterns may be produced by greatly increasing the number of control pins ineach bar link and to reduce the number of bar links required to produce a given pattern by one half.

Thetype of knitting machine to which my invention is applied is that of the crochet or chain stitch type. This type' of machine employs a plurality of bars carrying yarn guides which are moved longitudinally to bring the weft yarns into proper position with respect to the needles on the needle bar to knit or crochet the desired pattern. The means employed for moving these yarn guide bars longitudinally endwise, is similar to that disclosed in U. S. Letters Patent No. 512,059, dated January 2, 1894, to C. B. Sander and more particularly shown inFigs. 2 and 2a of the drawings thereof by the reference characters N, N, O, O O 0, O and my principal object is to provide such mechanism with means whereby the direction of travel of the chain of pin links may be reversed at predetermined points so that the most complicated patterns may be produced with a comparatively short chain of pin links.

Heretofore it has been the practice to use a bar linkhaving one row of a maximum of ten pins. ,M improved bar hnk has two or more rows 0- pins which are staggered,\vitl1 a correspondingncrease of the number of bars inthekn ttmg machine proper, so that my barlink'may have asmany as nineteen pins thus producing more elaborate and complicated patterns in the knitted goods.

' Heretofore it has been customary to use as many bar links as'there were rows of stitches in the pattern. These patterns, in practice,

.are symmetrical on each side of a center line andthis resultedin a duplication ofv the bar linksso that the pins on one half of the number of barlinks made one half of the pattern and thepins, in reverse arrangement on the other half of the number of bar links made the other half of the pattern, the chain of bar required by the chain of'bar links, which in knitting a complicated pattern, sometimes reaches from the floor to the ceiling, as well as reduces the Weight andimpact of the reciprocating chain of bar links so that less power is required and the wear and tear on the knitting machine is reduced.

In the drawings Fig. l is a side view of my improved control device F 1g. 2 is a top view of the structure of Fig. 1 on the line 22 thereof;

Fig. 3 is a view of the structure of Fig. 1 on the line 33 thereof; 7 Fig. 4. is a detail view of one form of reversing mechanism; and p Fig. 5 is another detail "view of the reversmg mechanism.

My control device can be applied to any standard knitting'machine of the type having bars controlling the position of the yarn gu des carried thereby and thus the actual knitting of the pattern, which bars are moved by pins on a link forming part of a chain of bars, whlch chain is intermittently reciprocated and driven against the ends of the bars in the knitting machine .to move the yarn guldes into proper position for each loop.

One of these control devices is provided for each end of a knitting machine and I have illustrated but one of theseas they are duplicates so far as mechanism and principle of operat on is concerned, the only difference being 1n the length of the pins, which varies with eachv pattern.

The control device consists of a chain of bar links 1 each provided with two or more staggered rows of holes 2, each hole being adapted to receive and retain a pin 3.

I and which intermesh on adjoining links,

being held together by a pin 6 so that an endless chain is formed. This chain of link bars is hung on rollers 7 and 8 mounted on the usual frame bars 9' and 10 which are given a reciprocating movement to drive them against and away from the bars in the knit-- ting machine proper. A feed roller 12 is mounted on a shaft 13 in line with the bars 11 on the knitting machine. This shaft 13 also carries a pair of ratchets '14 and 15, the teeth of which are opposed.-

Reverse movement of the pin chain 1 is effected by the slidable bar 19 carrying tripper arm 21 and slidable bar 20 carrying tripper arm 22, said bars being devoid of yarn guides. Two pawl arms 16 and 17 are hinged to the frame f of the knitting machine and extend downward in an inclined position to cooperate with the tripper arms 21 and 22 respeciively whereby the pawl arms are raised and lowered to engage and disengage the ratchet wheels 14 and as the bars 19 and 20 are moved in or out by pins on the chain. T his movementis accomplishedby thetripper arms 21 and 22 sliding along the inclined arms 16 and 17, thus raising the free ends of the latter out of engagement with the ratchet wheels or lowering same into engagement there with, as the case may be. v

The ratchet wheels 14 and 15 with their teeth set in opposite directions, as shown in Fig. 4, are secured to the shaft 13 which carries the chain of pin links. The pawl arm 16 co-acts with the ratchet wheel 14 and the pawl arm-17 co-acts with the ratchet wheel 15.

When the pawl arm 16 is in operative engagement with the ratchet wheel 14, and the chain and its support are swung toward and away from the frame'of the knitting machine so as to position the yarn guide bars, the shaft 13 will revolve to the right, (Fig. 4), carrying the chain one link on each reciprocation, the pawl arm 17 during this time being raisedoutofoperativeengagementwith ratchet wheel 15. lVhen the pawl arm 16 is raised out of engagement with ratchet wheel 14 by tripper arm 21, the pawl arm 17 is lowered to engage the ratchet wheel 15 thus causing the chain to travel to the left on the reciprocation of the carrier and chain, as shown in Fig. 4.

I prefer to mount the control bars 19 and 20 in a slightly off-set position as shown in Fig. 3, so" as not to interfere with the yarnv guide bars 11.

. To effect reversal of movement at any predetermined point in the knitting or crocheting, it is only necessary to insert a reverse control pin 3a, the latter being'of the same type as the pins 3, in the proper link of the chain at each end of the knitting machine so that one pawl arm will be lifted as the other is lowered, Reverse movement of the cha n may occur at any predetermined point during the knitting or crocheting operation, said reverse movement occurring when the reverse pin 3a, .contac'ts with either of the control bars 19 and 20. p The frame 9 reciprocates to and from the knitting machine in the usual manner and.

for the next row of stitches, this operationtaking place alternately at each end of the knitting machine in the well-known manner.

A chain of bar links and pins are-set up to knit one half of a pattern and on' the last barlink of the half pattern a reversing pin is mounted to reverse the position-of the drive rods 16 and 17 so that the chain of links will travel inthe opposite direction and knit I the other half of the pattern. p

It is obvious that other reversing mechanisms may be substituted for that shown without departing from the scope ofmy invention, which resides essentially in providing the bar links with a plurality of staggered rows of pins so that a greater number of bars may be operated at one time and reversingthe direction of travel of the chain of bar links so that but one half the usual number will be required.

Having now described my invention, what I claim, and desire to secure by Letters Patcut, is:

1. In a warp knittingmachine of the chain stitch typnganovable weft 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 plurality of staggered pins carried b each of said bar members to actuate said gu des to control the throw of the, weft yarn, means to actuate the patter nmechan ism in one direc ion throughout its length to produce onehalf of the design, and means for reversing ,the movement of the pattern mechanism tl roughout its length to complete the design} 2. In a warp knitting machine of the chain stitch type, movable weft yarn guides, pattern mechanism formed of a plurality" of bar members, the length of said patternmechanism representing a portion less than the whole of a symmetrical design in thefinished fabric, a plurality of staggered pins carried by each of said'bar members to actuatesaid guides to control the throw of the weft yarn, means to actuate the pattern mechanism in one direction to produce said portion of the design, and means for reversing the movement of the pattern mechanism to complete the design.

3. In a pattern mechanism for knitting mas chiines, a pair of bar link chains, one at each en 0 receive removable pins, control bars, actua the knitting machine, each bar link of said chains'being provided with holes to tion of which positions arn guidesto control the pattern, means or feeding said bar links successively to a position opposite said control bars, means for reciprocating said bar link chains alternatively to cause said pins to engage and move said control bars, means to reverse the direction of feed of said bar links, and removable pins carried by said bar links to actuate said reversing means.

4. In a pattern mechanism for knitting machines, a pair of bar link chains, one at each end of the knitting machine, each bar link of said chains being provided with holes to receive removable vpins, control bars, actuation of which positions yarn guides to control the pattern, means for feeding said bar links successively to a position opposite said control bars, means for reciprocating said bar link' chains alternatively to cause said pins to engage and move said control bars, means to reverse the direction of feed of said links, said reversing means comprising shafts rotation of which moves said. chains, a ratchet wheel mounted on each of said shafts to rotate the same in one direction, a second ratchet wheel mounted on each of said shafts to rotate the same in the opposite direction, pawl arms en gaging said ratchet wheels to rotate the same, means for positioning said pawl arms to alternatively engage and release their respective ratchet wheels, and removable pins insert-ed in said bar links which, when inserted actuate said positioning means to cause ratchet wheels alternatively to rotate said 37, shafts. i I

This specification signed. this 7th day of March, 1931. I HARRY 'WEINRUB.

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