US705327A - Rotary take-up for sewing-machines. - Google Patents

Description

No. 705,327. 'Ptented July 22, |902.

l P. DIEHL"& M. HEMLEB. BUTABY TAKE-UP FOB SEWING MACHINES..

(Applieatiog tiled. Kay 7, 190.1.) (lo Mael.) 2 sheetsshear @MMIII Illllmllllll;

\ RWE No. 705,327.. Patened July 22, |902.

P. mEHL & M. HEMLEB. RUTARY TAKE-UP FDR SEWING MACHINES.

(Application mea my 7, 1901.) noulouel.) 2 'sheets-sheet 2.

/w-se: A five/far UNITEDA STATES PATENT OFFICE.

PHILIP DIEHL AND MARTIN HEMLEB, OF ELIZABETH, NEW JERSEY, ASSIGN- ORS TO THE SINGER MANUFACTURING COMPANY, A CORPORATION OF NEW JERSEY.

SPECIFICATION forming part of Letters ratentNe 705,327, dated July 22, 1902. Appucauon tied May 7, 1901. serai N5. 59,119. No model.)

T @ZZ wY/Om Y? WMZ! COTbUWl/f ing-shaft, journaled in the upper portion of 5o Be it known that we, PHILIP DIEHL and the arm and provided at its forward end with MARTIN HEMLEB,citizens of the United States, a crank e, connected by a ptmanfto the neeresiding at Elizabeth, in the county of Union vdle-bar g, carrying the needle h. The shaft c and State of New Jersey, have invented ceris provided near its rear end with twin cranks tain new and useful Improvements in Rotary 41, connected by pitman 42 with similar twin 55 Take-Ups for Sewing-Machines, of which the cranks 43 at Vthe rear end of a shaft 44, jourfollowing is a specification,'reference being .naledbeneath the work-plate band carrying had therein to the accompanying drawings. at its forward endthe revolving hook 5,with ro This invention relates to rotary take-u ps in which is peripherally supported the threadfor sewing-machines, and has for its object case 10, arranged eccentrically to or at one 6o to provide a rotary take-up of simple conside of the axis of said hook, so as to secure struction which is more particularly adapted an early discharge of the loops of needlefor cooperation with a stitch-forming lnech- .thread around or over the said thread-case anism comprisinga rotary loop-taking device by said hook." The above-described connec- (preferably a rotary hook) which always tion of the hook-shaft 44 with the driving- 65 moves at a uniform speed andwhich pershaft c, Vwhich operates the needle-bar, enforms one rotation to each reciprocation of ables the hook 5to have a regular or uniform the needle-bar. rotary movement in unison withthe shaft c, 2o To this end the improved take-up in its so that said hookwill perform one rotation preferred formcomprises a hub or disk carto each reciprocation of the needle. 7o

ried by a small shaft mounted in the head of The parts thus far described are or may be the machineand carrying an offset ring or essentially the same as the correspondinglyguard which is pear-shaped or of irregular designated parts of the machine shown and oval form and which is partly concentric with described in United States Patent No.663,808,

and partly eccentric to the said shaft, the ec- December l1, 1900, and which machine is the 75 centric portion of the said ring being coninvention of Philip Diehl. nected with saidy hub or disk by a take-up f Journaled in 'a bearing portion d of the arm between each side of which and the said vface-plateais `a take-up shaft j, provided at 3o eccentric portion of said ring or guard is a ,its'inner'end with a` slotted crank lc, engaged free thread-space.' The take-up shaft is prefby the'needle-bar-operating crank-pin 'm of 8o erably outvof line with the needle-bar operthe crank e, said take-upshaft carrying at ating or dri-ving shaft, from which said'takeits outer end a hub or disk n,f offset from up shaft is actuated, so that the take-up will which is aring or guard o of irregular oval have a differential rotary movement to acoutline orpear-shapedvform connected with celerate the take-upf action to secure the lsaid disk by a tangential take-up arm p, 85 propei` timing in tightening theloops of neewhich is preferably integral with both said (lle-thread. disk and ring. One part of said offset ring In the accompanying drawings, Figure lis or guard is preferably concentric with the 4o a longitudinalv sectional'view of a revolvingdisk n, while the other part of the said ring or hook sewing-machine embodying the invenguard projects eccentrically from' the lsaid 9o tion. Fig. 2 is a front end view of the same. disk, and the entire ring" or guard is joined Figs. 3, 4, andare diagrammatic views illusto the said disk by thetake-up arm p, on trating in connectionv with Fig. 2 the opera| both sides of which, within the eccentric part tion of the improved take-up. Fig. 6 is a deof said ring or guard, is a clear thread-space.

tail view to show the slotted crank of the The ring o serves not onl'yas athread or loop 95 take-up shaft.' guard to maintain the needle-thread conv Referring to the drawings, a denotes the stantly around or on the'said take-up arm arm; b, the work-plate; c, the rotating drivp, but also serves as a thread-controller to prevent the thread from tlopping about when slack. Guide-eyes a: and gare provided upon the face-plate adjacent to the take-up, lthe operative arm of which is located and operates in substantially the same plane therewith, and the needle-thread passes from the tension through the guide-eye 0c, over the take-up arm, and then through the guide-eye g/ to the needle, as illustrated in the drawings; The axis of the take-up shaftj is out of line with the axis of the driving-shaft c, so that an irregular or differential rotary movement is imparted to said shaft, the more rapid movement of the said shaft and of the take-up occurring during the take-up action of tightening a stitch and the slower movement when the slack thread is being carried by the hook 5 around the thread-case l0. The eccentric part of the ring or guard o and the outer portion of the arm p are preferably formed double to provide a recess or slit q, with which registers a stationary knife or thread-cutter r to sever the thread should it accidently be broken and become wound upon or entangled with the take-up. This feature is, however, not herein claimed, as it is not our joint invention, but is embraced by the application of Martin Heinleb, Serial No. 59,111, iiled simultaneously herewith.

The operation of the improved take-up will be readily understood from Figs. 2, 3, et, and 5 of the drawings. Fig. 2 shows the position of the parts when a loop of needle-thread has just been discharged from the beak S of the revolving hook 5 around the lower extremity of the thread-case 10 and the loop is free to he drawn up by the take-up to tighten the stitch. At this time the needle in the machine shown has completed its upstroke and is about to commence its descent. Fig. 3 shows the position of the parts just as the take-up action is completed andthe stitch tightened, and a very little further forward travel of the take-up from the position shown in Fig. 3 brings the latter into such position as to allow the thread to slip freely down or inward on the take-up arm p to become loose or slackened, as in Fig. 4, and as the take-up moves from the position shown in Fig. -t to the reversed position, (shown in Fig.5,) sliding down or outward on the said take-up arm 19, sufficient slack thread is afforded for the next loop to be carried by the hook 5 around the thread-case l0. Fig. 5 shows the take-up in silch a position as to yield all the slack thread necessary to enable the hook to carry a loop of needle-thread around the stationary thread-case. The left-over slack thread is all taken up by the time the take-up has again reached the position shown in Fig. 2 and the stitch-tightening take-up operation is about to commence.

Owing to the conjoint cooperation of the regularly or uniformly moving rotating hook operatively connected with the driving-shaft and needle-bar, so as to perform one rotation to each reciprocation of the needle, the threadcase supported by the hook and arranged eccentric to the axis of said hook, so as to secure an early discharge of the loops of needle-thread around the thread-case, and thus leave sufficient time in the rotation ot' the driving-shaft for the proper and easy operation of the take-up and the said rotary takeup preferably differentially operating, as described, the present invention contributes in a very important degree to the production of a smooth-running and comparatively silent very high-speed lock-stitch machine which is a decided advance in the art of mechanical sewing and is adapted, as has been demonstrated, to be successfully operated at a speed of four thousand stitches per minute or over. This improvement in the art is in a measure due to the cooperative action of the uniformlyrotating loop-taker and thc differentially-rotating take-up and which coperative action results in a better relative timing of these parts than would otherwise be secured, thereby contributing toward increasing the speed capacity of the machine.

From the foregoing description it will be seen that the take-up proper offers constructive features of radical novelty in the combination, with the rotary supporting-shaft, of an outwardly-projectng take-up arm mounted thereon and affording a slideway or castoff in contact with which the needle-thread is constantly maintained, so as to slide to and fro lengthwise thereof during each rotation, thereby producing for each stitch a quick take-up action but a slow two-stage payingout action which prevents the giving out of slack thread at any time sutiicient to endanger the kinking or snarling thereof previous to the drawing-down operation of the looptaker. Vhile the take-up arm is preferably formed upon an inner hub and carries at its outer end the ring or guard, it is evident that the hub is an unessential part of the device and that it is immaterial whether or not the guard be carried by the take-up arm or, in fact, whether or not it be attached to any moving part of the machine.

It is to be observed that the supportingshaft for the take-up is not necessarily separate and independent of the shaft of the machine by which it is actuated, excepting in the preferred form of the present improvement, wherein it is given a differential movement, as hereinbefore described.

Having thus described our invention, We claim and desire to secure by Letters Patentl. In a sewing-machine, the combination with a needle and its operatin g mechanism, of a revolvingloop-taker, a rotary take-up, and means for imparting a regular or uniform rotary motion to said loop-taker and an irregular or differential rotary motion to said take-up.

2. In a sewing-machine, the combination with a needle and its operating mechanism, of a rotary loop-taker, a rotary take-up, and

IIO

means for imparting a single rotation t0 said loop-taker at a regular or uniform speed and a single rotation to saidtake-up at an irregular or differential speed to each recprocationjoining said ring or guard with said disk or huh.

4, In a sewing-machine, the combination with a needle and its operating mechanism, of a continuously-revolving hook, a threadcase supported by and arranged eccentric Vto the axis of said hook, a rotary take-up, and means for imparting a single rotation to said hook at a regular or uniform speed and a single rotation to said take-up atl an irregular or differential speed to each reciprocation of said needle.

5. In a sewing-machine, the combination with a needle and its operating mechanism, of a rotary take-up comprising a rotary shaft and a take-up arm extending outward from the axis of said shaft and affording a vlongitudinal slideway or cast-off for the thread and on which arm the thread is in an outer position when the take-up action occurs and from which outer position the thread moves inward, and then again outward, when the said arm is reversed, during the thread-slackening operation.v

6. In a sewing-machine, the combination with a needle and its operating mechanism, of a rotary take-u p comprisinga rotary shaft and 'a take-up arm extending outward from the axis of said shaft and aording a longitudinal slideway or cast-od for the thread,and on which arm the thread is in an outer position when the take-up action occurs and from which outer position the thread moves inward and then again outward, when the said arm is reversed, during the fthread-slackening operation, and a thread-guard surrounding said take-up arm.

7. In a sewing-machine, the combination with a needle and its operatingv mechanism, of a rotary take-up comprising a rotary shaft and a take-up arm extending outward from the axis of said shaft and affording a longitudinal slideway orcast-oif for the thread,and on which arm the thread is in an outer position when the take-up action occurs and from which outer position the' thread moves inward and then again outward onsaid arm,

when the latter is reversed, during the threadslackening operation, and a rotary guard xed upon and supported by the outer end of said take-up arm.

S. In a sewing-machine, the combination with a needle and its operating lnechanism, of a rotary shaft, two thread-eyes arranged adjacent thereto, a take-up arm extending v outward from said shaft and located substantially in the plane of said thread-eyes and affordin g a longitudinal or in-and-out slideway for the thread and on which arm the thread is in an outer position when the take-u p action occurs, and from which outer position the thread moves inward and then outward, when the arm is reversed, during the threadslackening operation.

9. In a sewing-machine, the combination with a needle and its operating mechanism, of a rotary shaft, a take-up arm extending outward from said .shaft and aording a longitudinal or in-and -out slideway for the thread, and on which arm the thread is in an outer position when the take-up action occurs, and from which outer position the thread moves inward and then outward, when the arm is reversed, during the thread-slackening operation, and means for maintaining the thread constantly around or on said take-up arm throughout each complete rotation of the same,while permittingit to slide freelylengthwise thereof.

In testimony whereof we affix our signatures in presence of two witnesses.

PHILIP DIEHL. MARTIN HEMLEB. Witnesses:

H. J. MILLER, LULU GROTE.

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