US1054724A - Machine for sewing looped fabrics. - Google Patents

Description

A.L.TRAVER. MAGHINE FOR SEWING LOOPED FABRICS.

APPLICATION FILED FEB. 7I 1912.

Patented Mar. 4, 1913.

3 SHEETS-SHEET 1.

@,a, Low/U ATVUHNEY A. L. .TRAVER. MACHINE ro SEWING LooPED FABRICS.

,Ek-JK M ATTDHNEY A. LTRAVBR. MACHINE FOR SEWING LOPED FABRICS,

Patented Mar.A 4, '1913'.

3 SHEETS-SHEET 3.

APPLICATION IILBD FEB'. 7, 1912.

50 \5l' ATVUHNEY fr r11@ BELBERT L. TEAVER, OF PHIL-MONT, NEW YORK.

MACHINE FR SEWING LDOPED FABRICS.

Specification of Letters Patent.

Patented Mar. 4, 1913.

.application :tiled February 7, 1912. Serial No. $75,919.

,To all 'whom t may; concern:

Be it known that AcuLaser L. Teure, a citizen of the United States, residing' at lhilmont, county of Coiumbimand State of New York, have' invented certain new and useful Improvements in Machines for Sew-- ing Looped Fabrics, of which the vfollowing is specification. Y

l TheV invention relates to .such improvements and consists of the novel construction and combination of parts hereinafter described and subsequently claimed.

Reference-may be had .to the accompanying drawings, and theI reference characters marked thereon, which form a part of this specification. Similar characters refer to similar parts in the several gurestherein.

Figure 1 of the drawings is a 'tcp plan view of a machine embodying my invention adapted for sewing looped fabrics. Fig. 2 is a front elevation of the same. Figs. 3, 4,

5, 6, 7 and 8 are diagrammatic views shoW-.

ing successive positions assumed by the needle, looper and loop-spreader relatively to each other and to the work and work-supporting points in the loperation of the machine. Fig. 9 is a top plan View of 'the loop-spreader detached. F ig. 10 is a 'view in top plan of a broken away portion of the point-cylinder and the head upon which the same is mounted, showing a stitch-retaining finger or bar overhanging the points.

This invention relates to sewing-machines, and more particularly to a two-thread sewing-machine for sewing looped fabrics, as in attaching knitted cuffs to the vsleeves and legs of knitted underwear.

Certain objects of the invention are to facilitate the interlooping of the threads, one with anotheigto form the seam, and to operate the parts oy a more uniform movement, resulting in a more smooth running machine.

@ther objects will appear in connection with the following description.

Referring to the drawings wherein the invention is shown in preferred form, 1, is the frame of the madhine having the arm, 2, upon which is rotatively mounted thepointcylinder, 3, having the pcriplierally disposed points, -l-, upon which the looped-fabrics'are impalc'l in the usual manner. The pointcylindcr has fixed. thereon the toothed gear, 5, engaged .by a pinion, 6, as indicated by dotted lines in Fig. 2, for impart-ing rotative movement to the cylinder. 'lhe pinion, 6,

is in tixcd relation to a ratchet, 7, rotatively mounted upon the head, 2a, of the arm, 2, and adapted to be engaged and intermittently operated by a pawl, 8, whereby a stephy-step rotative movement is imparted to the point-cylinder. A horizontal shaft, 9, is rotatively mounted in hearings upon the frame, l, and is adapted to be driven by means of a belt-pulley 10. The pawl, 8, is fixed upon the end of an arm, 11, projecting from the strap, 12, of an eccentric, 13, fixed upon the shaft, 9. whereby reciprocating movements are imparted to the pawl, 8, in the operation of the machine.

The stitch-forming mechanism comprises a thread-carrying needle, 14., a thread-carrying looper, 15, a loop-spreader, 16, with means for operating them in proper order and in proper relation to each other andv to the points-supported fabric. The'needle is fixed upon one end of a lever, 17, pivotally mounted on spindle, 1'8, upon the arm, v2, and having its other arm connected by a rod, 19, with a Vstra 20, of an eccentric, 21, fixed upon the s aft, 9, whereby 'a `reciprocating endwise movement of the needle is induced, the needle being curved andmoving in close proximity to the several points, 4, so as to pass through the fabric impaled upon said points, the needle being arranged to point outwardly. The thread, 22, for the needle passes through a tension, 23, fixed upon the spindle, 18, uponv which the lever, 17, is pivotally mounted, from4 which tension it passes over a spring take-up, 24, and through an eye, 25, on the needle-holder o-n the lend of the lever, 17, and thence to the eye of the needle.

The thread-carrying looper, 1 5, 1s fixed upon the arm, 26, which projects from a rock-shaft, 27, mounted upon a bracket, 28, projecting from the arm, 2, said rock-shafthaving a rocker-arm, 29, connected b y a universal joint at, 30, with a rod, 31, projecting from the sleeve, 32, of an eccentric, 33, fixed upon the shaft 9. The rock-shaft, 27, is mounted upon a inclined axis su'ch that its rocking movements cause the looper to reciprocate through a curved path vextending transversely of the direction of movement of the needle, the inner end of the loopen moving to and fro between a point outside 'of and above' the plane of the point-cylinder, and in rear of the vertical plane of t-he needle, `to a point within and below the top of the ,point-cylinder, and in front of the verloop in the path of the and the needle, as

y mon drive-shaft, as

tical plane of the needle, movement the ,inner end of the looper clears the heels of the points 4.

The thread, 34, for the loo-per passes through a tension, 35, supported on an arm, 36, fixed upon a spindle, 37, projecting from the frame, 1, from which tension it passes over a .hiring take-up, 38, through an eye, 39, on the frame of the machine, to the looper which is provided with two eyes, the thread passing from rear to lfront through the outer eye, 40, and from front to rear through the inner eye, 41, at the inner enrd or pointofthe looper.

The loop-spreader, 16, is fixed upon the end of a lever, 42, fulcrumed upon the spindle, 37, and connected by a rod, 43, with the strap, 44, of an eccentric, 45, fixed upon the shaft, 9, "whereby reciprocating movements are imparted to said loop-spreader. The end of the loop-spreader, 16, is formed with a thread-engaging notch, 46, and its moveduring which just ments are such that 1ts notched end reciprocates through a curved path extending transversely and just in rear of the path of the needle, and transversely and just in front of the pathl of the looper. The upwardmovement A(fythe loop-spreader thus causes its notche end to move from a position below and outside the periphery of the pointed portion of the cylinder, 3, upward and inward to a position above and overhanging the points on the cylinder, during which up.- ward movement its notched end, 46, engages the stretch or loop of needle-carrying thread between the eye of the needle and the work, and draws out and spreads the same into a looper, 15, through which spread-loop the looper passes on its inward and downward movement.

By the employment of the loop-spreader, 1.6, to spread the loop to receive the looper, 15, such latitude is permitted in the timing of the movements of the looper and needle that I am able to operate both the looper well as the loop-spreader, by means of eccentrics mounted upon a comshown; and, by the employment of eccentrics to operate each of the elements of the stitch-forming mechan ism, I secure great uniformity in their movements, resulting in a very fast and smooth running machine.

From a comparison ofFigs. 3 to 8, inclusive, the relative timing of the movements of the needle, looper and loop-spreader, as well as the manner of forming the stitch,

l will be readily understood. In Fig. 3, the

needle is shown at approximately the limit of its forward movement, and the llooper v near the end of its outward or return move-- in. its upward movement, a stretch, 34.,

ment', and the loop-spreader about midwayf the looper thread being shown extending from the end-eyeof the looper to the work,

47, impaled upon the points 4. Fig. 4 shows no material change in the position ot the needle, but the looper is shown at approximately-the limit of its return movement, and the loon-spreader at a higher point in its upward movement .in engagement with a stretch, 2220i theneedle-thread extending from the eye of the needle to the work. As the loop-spreader continues its upward movement the. needle begins its return movement, leaving the loop or stretch, 22, slack, so that thesame readily yields to the upward pull of the loop-spreader until the loop, 22, is drawn out full in the path of the looper. In Fig. 5, the loop-spreader is shown approximately at the limit of its upward movement, with the loop, 22, fully spread, the looper having begun its forward movement, and the needle being near the end of its return movement. In Fig. 6, the looper has moved forward through the spread-loo-p, 22a, the loop-spreader has justbegun its return movement, and the needle is nearly at the end of its return movement. In Fig. 7, the loop-spreaderis shown about midway,V in its return movement, the spreadloop, 22, having been released Aby the spreader and being left upon the looper. j In y Fig; 8, the looper is shown at about the limit of its forward movement, the loop-spreader at about the limit of its return movement, and the needle midway in its forward movement, the needle passing just in rear of the looper and in front of the stretch, 34a, of looper-thread extending from the end-eye of the looper to the work, its point of connectionwith the work being new somewhat in rear of the path of the needle,AA due to the feed-movement of the point-cylinder, which feed-movement, occurs during the final re- 105 t-urn movement and the initial forward movement on the needle. AThe looper begins its return movement and the loop-spreader be,- gins its forward movement at about the same time that the point of the needle enters the work, and the forward movement of the needle and the return movement of the looper are continued until they again reach the position shown in Fig. 3, thus completing the cycle of movements.

I have shown mounted upon a fixed support, as the head, 2, of the arm, 2, a stibchretaining bar or finger, 48, overhanging the points, 4, at and for some distance in rearv of the point whereatl the stitches are formed. The needle passes below the nger 48, and the looper above said finger, whereby the stitches inserted in the work are caused to embrace said finger. A slight" surplus of the .threadsis thus held by this stitch-retaining inger until the stitches have passed beyond the pxulling-influence of the stitchormingmec anism and the tensions, so that 'asQthe stitches.

finally pass oil over the end .of eccentrics on said drive-shaft;

which adds to the elasticity of the seam. The finger, 48, also serves to retain the stitches in the interval between' successive pieces of work presented to the stitch-forming mechanism. The linger is adjustably mounted by means of a set-screw, 49, upon a bracket-plate, 50, secured by a screw-bolt, 5l, to the head, 2, of t-he arm 2.

,IVhat I claim as new and desire to secure 'by Letters Patent is 1. In a machine ofthe class described, and in` combination, a cylinder having peripherally disposed points upon which the work is impaled; means for imparting a feed-movement to said cylinder; three stitch-forming elements comprising an outwardly pointel thread-carrying'needle, a thread-carrying looper, and aloop-spreader,

- 4said looper and said loop-spreader being each movable from a point outside the cylinder transversely of the path of the needle, and said loop-spreader being adapted to engage a loop of the thread carried by one of said thread-carrying elements and spread the same in the path of the other of said threadca1rying elements; and means for operating said stitch-forming elements.

2. In a machine of the class described, and in combination, a cylinder having peripherally disposed points upon which the work is iupaled; a. drive-shaft; a plurality and three stitchforipingl elements operatively connected with the respective eccentrics on said drive-shaft, said elements comprising an outwardly pointed thread -carrying needle,

a thread-.carrying looper, and a. loopspreader, said' looper and said loop-spreader being each movable from a point outside the cylinder transversely of the path of the needle, and said loop-spreader being adapted to engage a loop of the thread carried v by one of said thread-carrying elements and spread the same in the path of t-he other of said thread-carrying elements. I

3. In a machine of the class described, and in combination, a cylinder having pe- -ripherally disposed point.' upo'n which the work is impaled; means for imparting a feed movement to said cylinder; an outwardly pointed threml-carrying needle re` ciproratory through the work impaled 0n said points; an inwardly pointed threadcarrying looper movable transversely of and in front of the path of the needle;.a loop-spreader movable transversely of the path of the needle in rear thereof, and transversely of the path of the looper in front thereof, and adapted to engage a loop of the needle-thread and spread the same in the path of thel looper; and means for operating said needle, looper and loop-spreader.

4. In a machine of the class described, and' in combination, a cylinder having peripherally disposed points upon which the work is impaled; means for imparting a feed movement to said cylinder; an outwardly pointed thread-carrying needle reciprocatory through the Work impaled on said points; an inwardly pointed threadcarrying looper `movable transversely of and in front of the path of the needle; a

loop-spreader movable transversely of the path of the needle in rear thereof, and transversely of the path of t-he looper in front thereof, and adapted to engage a loop of the needle-thread and spread the same in the path of thelooper; a drive-shaft; a

plurality of eccentries on said drive-shaft;

and operating connections between said needle, looper and loop-spreader and-the respective eccentrics.

5,-In a machine of the class described, and in combination, a cylinder having peripherally disposed points upon which the work is impaled; means for imparting a feed movement to said cylinder; a stitchretaining finger extending above and transversely of the point whereat the stitch is formed, and a plurality of points in rear thereof; and .stitch-forming mechanism including a thread-carrying needle reciprocatory beneath said finger, a thread-carry ing looper reciprocatory above said iinger, and a loop-spreader reciprocatory on the outer side of said finger adapted to engage a loop of needle-thread and spread the same into the pat-h of said looper.

In testimony whereof, I have hereunto set my hand this 27 day of January, 1912.

ADELBERT L. TRAVER. Vitnesses Mrs. A. L. TRAVER,

BLANCHE E. TRAVER.

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

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