US669638A - Rotary take-up for sewing-machines. - Google Patents

Description

No. 669,638. Patented Mar. l2, l90l.

.|. HEBERLING.

ROTARY TAKE-UP FOR SEWING MACHINES.

(Application filed July 17, 1900.)

No Model.) 3 Sheets-Sheet l.

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- 31 JNVEATOR; W1 TNESSES (Ea-@666 d v No. 669,638. Patented Mar. l2, 19m.

J. HEBEBLING.

RDTARY TAKE-UP FOR SEWING MACHINES.

(LL f 3 Sheets-Sheet 2.

(No Model.)

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No. 669,638. Patented Mar. l2, l90l.

. J. HEBERLING..

ROTARY TAKE-UP FOB SEWING MACHINES.

(Application filed July 17, 1900.) (No Model.) 3 Sheets-Sheet 3.

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-tlnrrrnn States FFTCEQ JOHN HEBERLING, OF ROCHESTER, NEW YORK.

ROTARY TAKE-=UP FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 669,638, dated March 12, 1901.

Application filed July 1'7, 1900- To aZZ whom it may concern:

Be it known that I, JOHN HEBERLING, a citizen of the United States, residing at Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Rotary Take-Ups for Sewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

- This invention relates to a rotary take-up for sewing-machines, which is of such construction as to tighten the stitch quickly, so as to leave plenty of time in the rotation of the driving-shaft for the operation of the other parts of the sewing mechanism, and which is so timed relative to the movements of the needle and shuttle as properly to control the needle-thread at all times, so that during no part of the stitch-forming operation will there be an objectionable amount of slack needle-thread.

To this end my improved take-up comprises a rotating wheel or device which is geared to the driving-shaft, so as to perform more than one revolution, and preferably two continuous revolutions, toeach rotation of said shaft; but Withthis preferred construction the takeup and its cooperating parts are so constructed that there is but one take-up action to each rotation of the driving-shaft or to each reciprocation of the needle'bar, as the rotary takeup in the preferred form of' the invention seizes or picks up the needle-thread only at each alternate rotation and entirely casts off the said thread during its second rotation preparatory to the next take-u p operation.

In the accompanyingdrawings, Figure l is a front side sectional view of the head or forward part of the arm of a sewing-machine with my invention applied thereto. Fig. 2 is a front end view of the same with the faceplate partly omitted. Fig. 3 is a plan view, partly in section, of the same, showing the bearings for the rotary take up and the thread-guiding devices cooperating with the latter. Fig. 4 is a front end view of the head of the machine, showing the parts in the position which they occupy at the commencement of the take-up operation. Fig. 5 is a full front end view of the machine, showing the take-up in the position which it has assumed when the stitch is fully tightened.

Serial No. 23,922. (No model.)

Fig. 6 shows the take-up as having performed about two-thirds of its first revolution after having caught the needle thread. Fig. 7 shows the take-up as having just completed its first revolution after having Oddlgllt the needle-thread. Fig. 8 shows the take up in the position which it assumes when it has performed one and a half revolutions after having taken the needle-thread. Fig. shows the takeup as having just cast off the needlethread during the latter part of its second revolution. Fig. 10 is a detail plan view of the thread-guide on the face-plate.

Referring to the drawings, A denotes the forward part of the arm of a well-known form of sewing-machine, and B the rotary drivingshaft, j ournaled in the upper part of said arm and having at its forward end a crank-disk I), provided with a crank-pin 19', connected by a pitman b with the needle-bar O, to reciprocate the said bar in the usual manner. The crank-disk b is provided with pins 11 to form a sprocketwvheel, the said pins engagingholes in a driving-belt 5 running from the crankdisk and sprocket wheel over a smaller sprocket-wheel cl at the rear end of a shaft 1, to the forward end of which the rotary take-up wheel is attached. The sprocketwheel d is half the size of the crank-disk sprocket-wheel b, so that the take-up shaft will perform two revolutions in the same direction to each revolution of the drivingshaft B.

The rotary take-u p consists,as herein shown, of a skeleton disk or wheel 61 and a second skeleton disk or wheel (1 separated from the disk or wheel d so as to form a thread-passage between them, the outer wheel or disk 01 being connected to the inner wheel or disk 61 at two separated points by pins (1 and d which serve as take-up and thread-controlling crank-pins. The inner wheel or disk d is, as herein shown, attached to the forward end of the rotary take-up shaft d by a setscrew d and a clamping-washer d The outer wheel or disk of the rotary take-up is provided with a thread-seizing beak or hook d 'and forward of said beak or hook with an inclin ed thread guide and guard cl, the forward end of which at (Z extends inward into contact with the inner wheel (Z and the portion (1 of which is extended outward for the purpose of holding the needle-threadaway from the beak or hook at? when the rotary take-up ismakingits second revolution. Between the inclined thread guide and guard d and the portion (Z of the outer wheel of the rotary take-up is a gate or thread, passage (Z leading from the space d jin which a bight of the needle-thread is carried during the main part of the second revolution of the rotary take-up.

The face-plate, as herein shown, is formed of two parts a and a for convenience, although itis obvious thatit may be constructed in a single piece, as usual. Attached to the face-plate is a curved thread-guide a provided near the tension device E with an inclined thread-slot a and having near its opposite end a notch a the inner wallof which is inclined in such a manner as to bring the bottom of said notch outward at some little distance away from the outer face of the rotary take-up. The thread-guide (1 as herein shown, is formed of two parts, one of which is attached to the portion a of the face-plate and the other of which is attached to the portion a of the face-plate; but this thread-guide may be made in one piece, if desired. The tension device E, through which the needlethread passes on its way from the spool to the take-up,is provided with the usual threadcontrolling or check spring 6. The portion a of the face-plate is provided with ablock or thickened part a which serves as the main bearing for the rotary take-up shaft 01, although said shaft, as herein shown, has 'a portion of its bearing in the upper part of the arm A. Attached to the needle-bar C, so as to reciprocatetherewith, is a thread-controller 0, having a thread-eye through which the thread running from the take-up to the needle passes.

The operation of the invention is as follows: After a loop of needle-thread has been carried around the shuttle 'fand when said loop has arrived at the loop-discharging part of the shuttle or when the beak of the latter has performed a little more than a half-revolution after having taken the needle-loop and at which time the needle has risen to the top of its stroke, the needle-thread, which at this time extends from the bottom of the threadslots a to the thread-eye of the thread-controller c, which is now closely adjacent to the periphery of the rotary take-up, so as to hold the thread out of the notch a and in the path of the beak or hook d of the rotary take-up, the said beak or hook seizes the needle-thread and said thread is carried by said beak or hook and the take-up pin d as the take-up moves from the position shown in Fig. 4 to the position shown in Fig. 5, and during this movement of about a third of a revolution of the rotary take'up, or somewhat less, the stitch is fully tightened. During this takeup operation one limb of the needle-loop is in front of the outer take-up disk or Wheel (1 while the other limb thereof is in the threadpassage between the disks or wheels 01 and d constituting the rotary take-u p. As the takeup continues its rotation and when it has reached the position shown in Fig. 6, the outer limb of the needle-loop rides over the thread guide and guard d and falls into the space between the two disks or wheels of the rotary take-up, while at the same time. the thread is so controlled by the pins (1 and d that as the needle descends there will be no objectionable slack needle-thread to get in the way of the needle. As the rotary take-up moves forward from the position shown in Fig. 6 to the position shown in Fig. 7 the forward limb of the needle-loop passes outward through the gate or thread-passage c1 and is forced by the portion d of the thread guide and guard (1 into the notch a of the threadguide a the thread-controller 0 having at this time descended with the needle-bar and away from the rotary take-up, so as to permit this limb of the needle-loop to be thus carried outward into the said notch a where it is held away from the beak or hook d of the rotary take-up, and thus when the latter reaches the position shown by Fig. 7 the needle-thread will be held out of its way, so that it cannot at this time seize said thread. The rotary take-up now proceeds to perform its second revolution with the bight of needle-thread held by the outer take-up disk or wheel at the bottom in the space @1 (see Fig. 8) until the rotary take up has performed about threefourths of its second revolution, when the second limb of the needle-loop passes outward through the gate or thread passage 61 thus giving up the needle-thread to the curved thread guide and guard (Z across which said thread runs in a cord, as shown in Fig. 9, and

as the thread-controller c at this time has risen with the needle-bar the said threadcontroller again comes into close proximity to the periphery of the rotary take-up and draws the needle-thread out of the notch or and close up to the inner disk (1 of the rotary take-up, so that as the latter advances the beak or hook (1 thereof can again seize the needle-thread for the next take-up operation. At the time when the needle-thread is thus seized by the beak or hook 01 of the rotary takeup the said thread is drawn taut between the outer and lower ends of the inclined slot 0L and the eye of the thread-controller c, which is at this time close to the inner wheel or disk d so that the thread lies atan oblique angle to and crossing the plane of the outer disk or wheel (P, which carries the said beak or hook d During the last half or the second revolution of the rotary takeup the latter yields or gives up thread very rapidly to the shuttle, which is at this time expanding the needle-loop and carrying the same around to the loop-discharging side of the shuttle.

It will thus be understood that by the use of my improved rotary take-up, which performs two revolutions to each revolution of the needle-bar-operating shaft B or to each reciprocation of the needle-bar, the needleloops can be quickly drawn up and tightened during about a one-sixth or one-fifth part of the time occupied by a revolution of the needle-bar-operating shaft, and with the threadguide and controlling devices cooperating with said doul'ile-revolution take'np the needle-thread is controlled in such a manner that no objectionable slack will occur at any time, while the needle-thread is properly given up or yielded during the times the shuttle is pass ing into and expanding the needle-loops.

This invention is not to be understood as being limited to the details of construction herein shown and described, as for cooperation with a difiereritly-formed or diiferentlytimed shuttle than that with which the ma chine herein partly illustrated is provided somewhat different thread-controlli n g devices than those herein shown for cooperation with the double-revolution rotary take-up may be provided, and the construction of the rotary take-up itself may-be somewhat varied to secure a proper timing and a proper control of the thread during each entire stitch-forming period. Also my improved take-up may be used in machines in which rotary drivingshafts located below the work-plates are employed and'with which the said take-up may beproperly connected by gearing.

Having thus described my invention, I

. claim and desire to secure by Letters Patent- 1. In a sewing-machine, the combination with stitch-forming devices comprising a needle-bar and its operating mechanism, of a r0- tary take-up, and means for imparting two revolutions in the same direction to said takeup to each reciprocation of said needle-bar.

2. In a sewing-machine, the combination with stitch-forming devices comprising a needle-bar and its operating mechanism, of a r0- tary take-up, means for imparting two revolutions in the same direction to said take-up to each reciprocation of the said needle-bar, and thread controlling and guiding devices cooperating with said rotary take-up to enable the latter to perform but one stitchtightening or take-up operation to each reciprocation of the said needle-bar.

3. In a sewing-machine, the combination with stitch-forming devices including a reciprocating needle-bar, of a rotary driving-shaft operatively connected to said needle-bar to reciprocate the latter, and a continuously-rotating take-n p at the head or forward part of the arm of the machine geared to said needlebar shaft so as to perform two revolutions in the same direction to each rotation of the said driving-shaft.

4. In a sewing-machine, the combination with stitch-forming devices including a reciprocating needle-bar, of a rotary driving-shaft operatively' connected to said needle-bar to reciprocate the latter, a rotary take-up in the head or forward part of the arm of the machine geared to said needle-bar shaft so as to perform two revolutions to each rotation of the said driving-shaft, a thread-controller reciprocav ing with said needle bar, and stationary thread-guiding devices on the face-plate ofthe machine so cooperati ng with said thread-controllerand said rotary takeup that the latter cah engage the needle-thread at each alternate revolution only of said take-up.

5 In a sewing-machine, the combination with stitch-forming devices including a needle-bar and its operating mechanism, of a rotary take-up, means for imparting two revolutions to said take-np to each reciprocation of said needle-bar, said take-up consisting of the separated disks or wheels (Z d joined together at two points, as by the take-up and thread-controlling pins 61 and 01 the said disk or wheel (1 having the thread-seizing beak or hook (Z and being provided, forward of said beak or hook, with the inclined thread guide and guard (Z and with the gate or thread-passage (1 and thread-controlling devices oooperating with said rotary take-up to enable the said beak or hook to engage the needle-thread at each alternate revolution only of said take-up.

6. In a sewing-machine, the combination with stitch-forming devices including a needle-bar and its operating mechanism, of a rotary take up, means for imparting two revolutions to said take-up to each reciprocation of said needle-bar, said take-up consisting of' the separated disks or wheels d d joined together at two points, as by the take-up and thread -controlling pins 61 and (1 the said disk or wheel (7 having the thread-seizing beak or hook d and heing provided, forward of said beak or hook, with the inclined thread guide and guard and with the gate or threadpassage (1 a thread-controller reciprocating with the said needlebar, and the curved thread-guide a attached to the'face-plate of the machine and provided with the threadslot 6L3 and the notch 05*.

7. In a sewing-machine, the combination with the needle and a cooperating loop-taking device, of a needle-bar by which said needle is carried, a rotating driving-shaft provided with a crank-disk having a crank, a pitman connecting said crank with said needle-bar, said crankdisk being provided with teeth to form a sprocket-wheel, a rotary shaft provided with a sprocket-wheel having half the number of teeth of the first-named sprocketwheel,a belt connecting said sprocket-wheels, a rotary take-up carried by the said lastnamed shaft and performing two revolutions to each rotation of said driving-shaft, and thread controlling and guiding devices cooperating with said rotary take-up to enable the latter to perform but one stitch-tightenin g or take-up operation to each reciprocation of the said needle-bar.

8. In a sewing-machine, the combination with the stitch-forming devices comprising a reciprocating needle-bar and its operating mechanism, of a continuously-rotating take IIS up, and means for imparting more than a single revolution to said take-up to each reciprocation of said needle-bar.

9. In a sewing-machine, the combination with the stitch-forming devices including a reciprocating needle-bar, of a rotary take-11p connected with the needle bar-operating mechanism to perform a plurality of rotations to each reciprocation of said needle-bar, and thread-controlling devices cooperating with the said rotary take-up and serving to hold the thread across the path of the threadengaging part of said take-up at times and to hold it away from the said thread engaging part of the take-up at other times.

I In testimony whereof I affix my signature in the presence of two Witnesses.

JOHN HEBERLING.

Witnesses:

GEO. K. VINCENT, H. B. CASH.

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