US827654A - Take-up for sewing-machines. - Google Patents

Description

PATENTED JULY 31, 1906.

L. ONDERDONK.

TAKE-UP FOR SEWING MACHINES.

APPLICATION FILED JULYB, L904,

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the position of the parts When the needle is at 'r rnN'r Fries.

LAN ING ONDERDONK, OF NEW YORK, N. Y.. ASSIGNOR TO UNioN SPECIAL MACHINE ooMPANY, OF oHicAeo, ILLINOIS, A COR- PORATION OF ILLINOIS.

TAKE-UP Foss sewme-mAoi-aase.

Specification of Letters Patent.

Patented .rul si, 19cc.

Application filed July 8, 1904; Serial No. 215,790-

prove the manner-in which the take-up 0 erates to set the stitch, so that the feed wi be given time to finish its movements as to ength of stitch without having to overcome the resistance of the take-up when tightening the stitch,and, furthermore, to improve the manner in. which the take-up controls the slack thread. v

The invention consists in the arrangements and combination of parts hereinafter m'ore fullydescribed, and particularly pointed out in the claims. H

In the drawings, Figure 1 is a front view of the essential arts of the take-up, showing its relation to t e needle-bar and its operating mechanism, the needle being almost at it's Fig. 2 is asimilar viewshowing its highest point.

Thesewin -head is of the usual form and" is provided with a rotary shaft carrying at its forward end the crank-piece C. The needlebar N reciprocates in suitable bearings and is I connected to the crankiece C by a link L. These parts are of the'ordinary form and will not be further described.

Adjustablysecured upon the needle-bar N is a sleeve S, which is held in place by a setscrew 1. Pivoted to this sleeve is a bellcrank lever one arm of which extends downwardly and is connected by a link 2 to the needle-bar-operating link L at a point 3 and the other arm of which is free and is provided with a thread-eye 4. Rigidlysecured on the frame of the machine is the bracket B, which is provided with thread-eyes 5 and 6. The

thread passes from the su ply through suitable thread-guides to the t cad-eye 5, thence take-up.

ting the stitch after t dle. In the operation of the machine .the take-up arm vibrates between the thread eyes 5 and 6.,

The crank 0 moves in direction of the arrow in Fig. 2, and ,the operation of the takeup will be as follows: From the position shown in this figure the needle-bar begins to rise, carrying with it the bell-crank lever or The link L moving to the left will, however, cause the take-u to turn about its fulcrum 1, and as a res'u tant of these two movements the thread-eye 4 has a downward movement relative to the thread-e es 5'and 6 and will draw up theslack in t e needlethread and cause the needle to throw-out a comparatively small loop; The upward movement of the pivotal support of thetakeup soon becomes greaterthan the down movement of the thread-eye 4, caused by the lateral movement of the link 2. After the crank-pin 7' passes the quarterrevolution the lateral movement of the link 2 will cause the threadeye 4 to move faster than the needle-bar,

quickly drawing the stitch tight. After the needle-barbegins to descend the take-up eye 4 has a still farther u ward movement, setlibneedle-bar' begins to descend. By this movement of parts, wherein the stitch is set after the needle begins to descend, it will be noted that the feed is given time to finish its movement as to the length of stitch without having to overcome the re sistance ofthe takewhen tightening the stitch. After the stitcli is set the take up begins to slowl ive up thread to the needle until the nee le as entered or nearly reached the work, and thus the needle-thread is ke t fairly taut, so it cannot get in the way of t e,

needle-that is to say, it prevents the needlethread from looping around'the oint of the needle before it enters the wor and also keeps the needle-loop of theprevious stitch taut against the under side of the looper while said looper is drawing back. After the point of the needle has entered the work and By this arrangement and. o eration of partsI am able to do away wit the slackthread controller, thus simplifyingthe parts and producing a mechanism'which is espedc arting from the s irit of my invention.

aving thus descrlbed my invention, what 1 claim as new, and desire to secure by Letters Patent, is

1. The combination of a needle-bar, and means for operating the same, of a take-up carried by said needle-bar and having a thread-guide, thread-engaging means cooperating with said take-up, and means independent of the needle-bar for oscillating said take-up, said means iving said thread-guide an upward and stitc -tightening movement on the downward movement oi the needlebar'; substantially as described.

2. The combination of a needle-bar, and means for operating the same, ol? a take-up carried by said needle-bar and having a thread-guide, means for operating said takeup whereby the same is given an upward movement, and a-succeeding'faster movement during the latter part of its upward stroke, said upward movement of the threadguide-continuing after the needle-bar begins to descend; and a thread-engaging means cooperating with said take-up; substantially as described.

3. The combination of a needle-bar, a rotating crank and a link connecting said crank and needle-bar, of a take-up carried by said needle-bar, and means connected to said a l-O link for giving said take-up a movement insenate dependent of the needle-bar, and thread-engaging means cooperatin with the take-up;

substantially as describe at. The combination of a needle-bar, a rotating crank and a link connecting said crank and needle-bar, of a take-up lever pivoted on said needle-bar, a link connecting one end,

of said take-up lever to the first-named link, and thread-engaging means cooperating with the said take-up; substantially as described. 5. The combination of a needle-bar, a rotating crank and a link connecting said crank and needle-bar, of a bell-crank lever ivoted on said needle-bar, one arm of said be -crank carried by the needle-bar and thread-emgaging means cooperating with said take-up means independent'of the needle-bar for oscillatin said take-up, said take-up having a slack-tliread-controlling movement as the needle begins to ascend, a succeeding quick movement to draw the stitch tight, a stitchsetting movement while the needle is descending, and a relatively slow downward movement giving up thread to the needle; substantially as described.

in testimony whereof I aflix my signature in presence of two witnesses.

LANSING ONDERDONK. Witnesses:

C. D. CnURonILL, JOHN H. HOWELL, Jr.

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