US1239527A - Device for knitting upon transferred fabric sections. - Google Patents

Description

R. WI SCOTT. DEVICE FOR KNITTING UPON TRANSFERRED FABRIC SECTIONS.-

APPLICATION'fILEDJULY N. IE HS Patented Sept. 11, 1917.

2 .F e w Law? UNITED STATES PATENT OFFIQE.

ROBERT W. SCOTT, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO SCOTT & WILLIAMS,

INCORPORATED, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHU- SETTS.

DEVICE FOR KNITTING UPON TRANSFEBRED FABRIC SECTION-S.

Original application filed December 18, 1913, Serial No; 807,535.

To all whom it may concern:

Be it known that I, Ronnn'r IV. Soo'r'r, a citizen of the United States, and resident of Boston, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Devices for Knitting upon Transferred Fabric Sections, of which the following is a specification.

My invention relates to devicesadapted for use with knitting machines used for knitting upon transferred fabric sections.

In machines of the class indicated, while the operation of the machine devices is usually automatic, hand operations are required at the beginning of knitting. One object of my present device is 'to enable beginning operation of the knitting devices without interference by the operator with the knitting instruments.

In the accompanying drawings,

Figure 1 is a vertical central cross section of the upper part of .a machine equipped with my device.

Fig. 2 is a plan view of the devices shown in Fig. 1.

Fig. 3 is an enlarged diagram plan at the knitting point.

In machines of the class to which my device is particularly applicable, when a previous operation has been completed, the machine stops, the needles being bare, and the machine is then prepared for a new operation by manually transferring to the needles the loops of a previously knit section of fabric such as a rib top.

I11 order to perform the transfer operation, it is desirable to bring the needles to a level, prior to the application of the transferred section of fabric. hen the knitting begins, it is obvious that the movement then will be initiated at some particular part of the series of needles, that part of the series precedingsaid part remaining level, and in the usual case elevated.

In my application, Serial Number 807,535, filed December 18, 1918, (Letters Patent No. 1,150,517, dated August 17, 1915) of which this application is a division, I have eX- plained the operation of a machine for automatically ending the production of one article, leveling the needles, and stopping, and for thereafter beginning 'to knit, after the transfer has been made and after the new Specification of Letters Patent.

Patented Sept. 11, 1917.

Divided and this application filed July Serial No. 89,889.

chine has been started to produce another article, the operation including the automatic entrance of the operating cams into contact with the needles which they move. and the simultaneous or previous entrance of a knitting yarn into relation with the needles. Assuming the usual arrangement for stocking knitting of a circle of needles, half of which have long butts and half of which have short butts, the operation of the needles to knit conveniently begins at the longbutt needle leading its series in the direction of relative approach of the needles and the stitch cams. It has heretofore been customary, when beginning to knit upon needles which have been supplied with a previously knit fabric section while level, and thereafter operated to begin to knit at a particular point, to depress or otherwise position the needles by hand to secure the certain taking of the new yarn for a new course of loops by the first needle to be actuwhich onsumes time, I now provide devices coaoting with the needles first operated to knit to insure taking the yarn into their hooks, and for thereafter permitting normal operation of the needles. Preferred devices for this purpose comprise means for moving the needles first operated to knit with respect to the position taken by a yarn entered upon the leveled needles, and I will now describe one form of such means.

The machine of my said application is so organized that one of a series of movable yarn guides F drops into operative position just prior to the passage down the active face of the stitch cam of the leading longbut't needle a, Fig. 3.

Referring now to said Fig. 3, the retracting movement of the needle n begins upon its encounter with the down-going slope of a stitch cam (not shown) at a point near the vertical plane of the yarn guide F now in the operative position shown in Fig. 1. A yarn merely supplied to the level needles by operatively positioning the yarn guide at any time prior to or during their relative rotation with respect to the" yarn-feeding point roughly defined by this plane will lie at a tangent to the cylindrical surface defined by the needles, and in a position too high to be taken by the first and following needles moving down the slope of the stitch cam. At a later time, preceding needles which have taken the yarn are moving to a low point with respect to the yarn-feeding level, and the yarn extending from the guide F will then be taken certainly by all the needles, without assistance. a

The machine is provided with any usual internal yarn guide member preferably made as an attachment of latch-ring 300, such as that shown at 602, which may comprise a yarn severing device 608, and a yarn clamp 606. The free end of the new yarn from a guide F elevated to an inoperative position is held by the clamp 606 prior to its entry upon the needles when guide F is lowered.

I Upon the plate 602 an upright rigid post 705, Figs. 1 and 2, is provided, which carries the sleeve 706 having a lug 707 in which is a horizontal bore 708, to receive an internal needle cam-arm or presser 7 00, which may be made as a wire arm having a bend 701 to contact with the needles at apoint in the neighborhood of the vertical plane of the leading end of the active stitch cam. The cam or presser 700 is adjust-ably held in place by a set screw.702. The sleeve 706 is under the influence of a spring 709 held at one end by the set screw 702 and adjustably held at the other end by a bore 710 in a washer 711 held on the top of the post 705 by the screw 712. The spring 709, tends to remove the presse'r 700 from the position shown in Figs. 2 and 3 in which position it is adjusted to contact with and move a few of the needles outwardly out of line with the others and substantially into contact with the inner face of the latch-ring 300, as shown in Fig. 8, in which position the needle hook is well over a yarn entered between the level needles and defining a tangent from the yarn-guide F to the surface defined by the leveled needles.

The sleeve 706 is provided with a thumb piece 715 and with a lug 716, having a face radial to the post 705 to engage the outer end of a stepped latch 717 mounted 011 the same pivot 607 as the yarn clamping lever 606, which latch stands over the lever 606 as shown in Figs. 1 and 2. The outer end of,

the latch 717 when in engagement with the radial face of the lug 716 will hold the camarm 700 in the described position shown in Figs. 2 and '3, but when the latch 717 is ele-. vated as by lifting the lever 606 the sleeve 706 is permitted to rotate through a short distance underthe influence of the spring 709 until the lug 716 brings up against the step in the latch, as shown in Fig. 1.

When the device is in use the operator may set the lug 716 opposite theend of the lever 717 by means of the thumb piece 715 at the time of lifting the latch-ring, after the machine has stopped and prior to the normal transfer, without necessitating an extra movement of the hand; When the latch-ring is restored to its normal position after the rib-top or other section has been transferred, all of the needles will be engaged and moved outwardly as shown in Fig. 3 when the machine is rotated and this will continue to occur until the latch 717 has been moved.

As shown in Fig. 3, the yarn has been dropped in between needles 12 and a by movement of guide F. The free end of the yarn g which was cut at the end of the last operation, now rests under. the clamp 606, from which it will be withdrawn by the rotation of the machine acting through the needle 02 after the needle it shall have knit. The described operation of cam-arm 700 secures the taking of the first loop by the needle a in the manner explained, although all the needles preceding needle 11/ remain level until their neXt passage.

The, cam-arm or presser 7.00 is automatically released at any desired time follow ing the entrance of the yarn and beginning of knittingin any desired manner, as by causing the elevation of clamp lever 606 through the pattern-controlled connection 460, 611, 608, forming a part ofthe machine improved at a predetermined short interval after the knitting operation begins.

lVliat-I claim is 7 1. A knitting machine having a series of hooked needles, a yarn-guide adapted to be moved to operative position to begin knit ting, and means acting on all of the needles to move them laterally out of lineto the same extent at the yarn-feed point, toplace their hooks over the yarn at the beginning of knitting. T

2. In a knitting machine having. a series of hooked needles, a yarn-guide adapted to be moved to operative position to begin knitting, and means for retracting the needles to take yarn and knit, means active at the 2 beginning of knitting to cause all of the needles to be retracted to take yarn while in a position in which their hooked ends are out of line with the other needles of said series.

3-1L knitting machine having a series of hooked needles, a. yarn guide and a device for moving the needles laterally out of line at the yarn-feed point, to place their hooks over the yarn, in combination with means torender said device inactive at a predetermined time. a V

4. A knitting machine having in combination a series of needles, means for first actuating a predetermined needle to begin knitting, means for feeding yarn to said needle and others near it, and a device for moving said needle out of line with the other needles when it is first actuated to cause it to take over said yarn.

5. A knitting machine having a yarn guide, needles, and a device for locally moving a few needles in contact with it out of line in a fixed relation to the yarn-taking point, to cause the needles when actuated to take over the yarn at the beginning of knitting, in combination with pattern-controlled means for' rendering said device inoperative.

6. A knitting machine having in combination needles, yarn guide means comprising a latch-ring, a presser pivotally mounted on a part relatively fixed with respect to said latch-ring, means to hold said presser in operative contact with the needles, and means to release said holding means.

7 A knitting machine having needles, a latch-ring, an internal yarn guide member normally within the needles, a cam presser for the needles mounted on said internal yarn guide member, a latch for holding said presser in contact with the needles and pattern-controlled means for releasing said latch.

Signed by me at Boston, Massachusetts, this twelfth day of July 1915.

ROBERT W. SCOTT.-

Witness RUTH A. Borne.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, 10. G.

Images