US707145A - Take-up for sewing-machines. - Google Patents

Description

No. 707345. Patented Aug l9, I902.

F. w." MEBRICK.

TAKE-UP FOR SEWING MACHINES;

(Application filed Aug. 11, 1899.)

3 Sheets-Sheet L (No Model.)

his 04 15107216 ya.

witnesses No. 707,l45. Patgntgd Aug. l9, I902.

F. W. MERBICK.

TAKE-UP FOB SEWING MACHINES.

( Application filed Au 11, 1899.)

(No Model.) 3 Sheets-Sheet 2.

witness as: fnv enzfb r:

' his04 66-07716ya.

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No. 7o7,|4s. Patented Aug. I9, 1902'.

F. W. MERRICK.

TAKE-UP FOR SEWING MACHINES.

(Application filed Aug. 11,1899.) (No Model.) 3 Sheets-Sheet 3.

70667168365.- I Inventor: %m/Zb/J..M M. MM

UNITED STAT PATENT OF ICE.

FRANK W. MERRICK, OF BOSTON, MASSACHUSETTS.

TAKE-UP Fo'R SEWINGI-MACHINES.

SPECIFICATION forming part of Letters Patent No. 707,145, dated August 19, 1902.

' Application filed August 11,

.To all whom. it may concern:

Be it known that I, FRANK W. MERRICK, a citizen of the United States, residing at Boston, in the county of Sufiolk, State of 'Massa chusetts, have invented a certain new and useful Improvement in Take-Ups'for Sewing- Machines, of whichthe following is a specifi cation, reference being had-therein tothe accompanying drawings.

I have illustrated in the accompanying drawings the best form in Which I have thus far embodied my invention.

It should be understood at the outset that .I do not confine myself to the precise particulars of construction and arrangement'which are shown in the said drawings a'nd'referred to in the course of the following description, inasmuch as in many respects the details'may vary.

The essential features of the invention are clearly defined in the claims at the close of this specification.

Having reference to the drawings, Figure 1 is a partly-broken-out side elevation mainly intended to show the head and part of the arm or gooseneck of a sewing-machine and to illustrate the application thereto of a take-up embodying the invention, the thread-carrier mechanism being also represented in order that the relations between the same and the makeup may appear. Fig. .2 is a partly-sectional top or plan view mainly intended to show the take-up and thread-carrier mechanism. Fig. 3 is a view in vertical section on the plane indicated by the dotted line 3 3 in Fig. 2 looking in the direction indicated by the arrows near the ends of such line. Fig.

4 is a View in vertical section on the plane indicated by the dotted line 4 1 in Fig.2 looking in the direction indicated by the arrows near the ends of such line. Fig. 5 is a view mainly in vertical section on the plane indicated by the dotted line 5 5 in Fig. 1 looking in the direction indicated byvthe arrows near the ends of such line.

Having reference to the drawings, 1 designates the arm or gooseneck of the frame of a sewing-machine. 2 is thehead. 3 isfa'rotating shaft mounted in bearings in the said 3111],0119 of the said bearings being represented at 4, Fig. 1. 5 is the awl, working from above the material to be sewed;- 6, the

1899. Serial Nan-726.871- (NomodeL) 'presser-bar; 7 the presser -foot; 8, the hooked needle, working upwardly from below, and 81 the workrest.

All of these parts areas usual in sewing-machines and in practice are operated inv any approved manner.

'9 is the thread-carrier, which, if desired, may be operated in practice in any approved manner. Herein Ihave represented the same combined with'the particular operating devices therefor which are claimed in my application' for" United" States Letters Patent filed-August 11, 1899, Serial No. 726,869.

a designates the thread. v

10 and 11 are thread-guiding pulleys or rolls over which the thread passes on its way from the source of supply tothe thread-carrier 9. For convenience the pulley 11 is mounted on the arm 13, to which thread-carrier 9 is attached, while pulley 10 is mounted upon a pin 14, which is supported directly by the arm 1. (See Fig. 5.)

' My improved take up comprises, essentially, in its simplest form a rotary carrier, one or more pins applied to said carrier, and

.means to occasion a relative shift between the path of rotation of the pin or pins and the path of the thread to cause the pin or. pins to become engaged with the thread in the rotation of the carrier to efiect the taking up of thethread. I employ two pins 15 15 by preference, as in the illustrated embodiment of the invention, the said pins being disposed diametrically opposite each other on the carrier therefor. For ease of action upon the thread and to take the wear these pins are in practice surrounded by sleeves '16 16 The carrier comprises herein the central sleeve 17 and the heads 18 and 19 thereon. The takeup pins 15 15 are made fast to the head 19, and they and the sleeves 16 16 thereon are fitted to bushings 2O 20, which are placed in openings in the head 18. The sleeve l 7 of the carrier surrounds the shaft 21, theendsof which have fitted thereto bushings 2222, fitting openings inopposite sides of the arm 1 and secured therein by clamping-screws 221- 221. For the purpose of rotating the carrier aspur-pinion 23 is fixed upon sleeve 17, the said spur-pinion meshing with a carrier or intermediate 24, which latter in turn meshes with the spur-gear 25, fast on the short'shaft 26. Shaft 26 is mounted in a hearing at 27 in the arm 1 and has fast thereon the bevelgear 28, meshing with the bevel-gear 29 on shaft 3. Through the connections described the take-up device is rotated from the shaft 3.

An important characteristic of my take-up devices is the fact that the carrier is caused to make two or more complete revolutions to each turn of the machine. The shaft 3 from which the carrier is driven makes one revolution to each turn of the machine, and the required increased rate of speed of the carrier is secured by suitably proportioning the described motion -transmitting gearing by means of which the carrier is rotated from shaft 3. In the present embodiment of the invention the relative speed that is communicated to the rotary take-up is double that which would be required in order to bring the same in action for each stitch formation. By speeding up the take-up device in the manner just explained to a multiplied extent with reference to the action of the stitch-forming devices the excess of speed which thereby is secured causes the take-up to act upon the upper thread with the requisite prom ptness in drawing up a stitch and within the allotted portion of a turn of the machine, which portion thus is enabled to be reduced to a minimum. On account of the relatively multiplied speed of rotation of the take-up device every other turn thereof is an extra or idle one-t. a, it occurs when there is no stitch to be tightened up-but it is preferred that this should be the case, inasmuch as it is much easier to maintain the take-up in revolution at a uniform high rate of speed than it is to alternately speed up and then retard the motion of the take-up.

19 is fitted to the exterior of the sleeve 17.

with capacity to move lengthwise of the latter. Head 18 is fixed to the carrier. A convenient means of occasioning the movement of the head 19 and pins carried thereby relatively to the fixed head 18 and the path of the thread comprises the arms 30, provided with pins entering the groove 31 of the hub of the movable head 19, the said arms form ing part of a rocker 32. The said rocker has connected therewith a link 33,that is provided with a strap fitting an eccentric 34 on shaft 3. The path of the thread between the pulleys or rolls and 11 is close against the outer face of the fixed head 18 and below the prolongation of the sleeve 17, the said prolongation having applied thereto the bushing 35 to receive the wear that is occasioned by the thread. So long as the pins 15 15 and their sleeves 16 16 are retracted relatively to the said fixed head they do not engage with the thread. \Vhen, however, the movable head 19 is carried toward the fixed head 18, the

pins and their sleeves are caused to project at the outer side of the fixed head. They now, in the rotation of the carrier, engage with the thread at points on opposite sides of the center of rotation and immediately wrap the thread around themselves in the form of two loops, which are drawn out in opposite directions. The pins draw upon the thread through approximately half a revolution of the carrier, and then the loops of thread are cast off from the exteriors of the sleeves 16 16 as the latter are drawn reversely through the bushings 20 20. The pins 15 15 remain retracted relatively to the fixed head 18, and therefore incapable of engaging with the thread during the extra or idle revolution of the take-up device. In order to cause them to be projected into position to engage the thread only in the alternate revolutions of the carrier, the movement of the rocker which shifts the movable head 19 is derived from shaft 3, as aforesaid, the said shaft rotating at one-half the speed of the take-up device.

For the purpose of preventing the loops of thread from flying when they are shed or cast off from the sleeves 16 16 in the retraction of the pins 15 15 a yielding follower is employed adjacent the outer face of the fixed head 18. The said follower is constituted herein by a disk 36, which is acted upon by a spring 37,

that tends to bear the follower toward the of the follower andis compressed between the disk and a nut 39. The latter is applied to an externally-threaded bushing 40, which is applied to shaft 21 between the end of sleeve 17 and the adjacent bearing 22, a lock-nut 41 being applied to bushing 40, also to secure nut 39 after it has been adjusted to give the desired degree of tension to spring 37. One portion of bushing 10 extends over the prolongation of sleeve 17. The hub of the follower is sleeved upon the exterior of bushings and 40. The bushing 40 is held from movement relatively to sleeve 17 by means of a key 42, which latter serves also as a spline for the follower.

Adjustment of the amount of thread taken up by the action of the take-up is effected by moving the pins 15 15 toward or from the center of rotation of the carrier. In order to permit of a radial movement of the said pins, the openings in head 18, which receive the bushings 20 20, and those in head 19, which receive the pins, are formed as radial slots, as shown in the case of the latter at 13 43, Fig. 4.

For the purpose of enabling the pins 15 15 to be adjusted simultaneously and to equal extents in either direction I combine therewith the adjusting-plate 14. The latter is formed with cam-surfaces to act on the, said pins. Herein the said cam-surfaces are constituted by duplicate or similar eccentric curved slots 45 45, (see Fig-4,) through which the'pins pass. The said plate is at the'outer side of the movable head 19 andis clamped in position and to the said movable head by" means of the nuts 46 46, by which the pins 15 themselves are made fast. I

The drawings show the thread-carrier mechanism which is claimed in my application aforesaid for United States Letters'PatentJ The said mechanism comprises, essentially, an Inner oblong open frame or yoke 47, which is formed or provided with the arm 13, to

which the thread-carrier 9 is applied, an outer similar oblong openframe or yoke 48, a link 49, and an eccentric 50 on shaft 3,to whichv eccentric is fitted the strap with'which the .link 49 is formed or provided. 'One end of the outer yoke 48, is pivoted to the head 2 by the link 49 by the actionof the eccentric 50' means of center screws 51 51, passing through prolongations of the said outer yoke and finding seats or bearings on the front and rear sidesof the head. The yoke 48 is adapted to swing vertically about. the axes of the said center screws. The inner yokeet7 is pivoted at its opposite ends to the cross bars of the outer yoke by means of center screws at 52 52 and is adapted to swingjtransversely about the axes of the said center screws. The lower end of the link 49 is connected pivotallywith the opposite side bars of theinner yoke47 by means of center screws at 53 53. The ascending and descending movements given to serve to rock the two yokes about the axes of the center screws 5151, thereby swinging the free'end of the thread-carrier 9 to the right and left in Fig. 1 with reference to the needle 8. The transverse movements that are communicated by the said eccentric tothe said link serve to rock the yoke 47 transversely within the outer yoke 48 upon the center screws 52' 52, thereby causing the free extremity of the thread-carrier to partake of a forward and rearward movement as it swings.

Thus the thread-carrier is caused to make a complete circuit around the needle at ever turn of the machine.

The foregoing construction of threadcar-- rier mechanism has been devised with especial reference to being combined with the herein described form of take-up. The heads,

&'c., of the latter fit within the opening of the inner yoke, while the side bars of both yokes are dr'opped or bent downwardly at the middie of their length, so as to clear the sleeves, bearings, and other partspertaining to the a take-up'at both sidesof'the' heads.

tion of the said paths, whereby the said loops. are released during the continued rotation of the carrier, substantially as described.

2. A rotary take-u p comprising,essentially, a carrier, means to rotate the same, diametrically opposite pins with which said carrier is provided, means to project said pinstransversely across the path of the thread, whereby transversely out'of the said loops to release the latter, substantially as'described.

3. A rotary take-u p comprising,'essentially,

. the engagement 'of the pinswith the thread' "operates to form oppositely-extending loops 1 therein, and subsequently retract said pins a carrier, means to rotate-the same, diametric ally opposite pins with which said carrier is provided, means to occasion.intersectionof the path of the thread bythat of the pins, whereby oppositely extending loops are formed in .the thread by the rotation'of the pins, and subsequent separation *ofthe said paths,whereby the said loops are released during the continued rotation of the-carrier,aud

a yielding follower to prevent flying of the thread after its disengagement from the pins,

substantially as described.

4. A take-up for sewing-machines, comprisin g a rotary carrier,oppositely-located th readengaging pins engaging withthe thread to.-

form oppositely-extending loops, means to project saidpins to engage vwith the thread and retract the same to-free the thread, and

the yielding follower alongside. said carrier.

5. A rotary take-up for sewing-machines, 7 comprising oppositely-located thread-engaging pins engaging with the thread to form op-- positelyextending-loops, ahead through which said pins work, a second head with which the said pins are connected, and oper- IOO atingmeans whereby projection of the-said pins relatively to the head first mentionedis occasioned to effect their engagement with the thread intermittingly. v, i

6. A take-up for sewing-machines comprispositely-located thread-engaging pins work ing through-said fixed head, a movable head with which the said pins-are connected-, and

inga rotary carrier having a fixed head, op

means to adjust the said pins toward and from 1 each other, and means to operate the said movable head and thereby project and retract the thread-engaging ends of the said pins at the side of the fixed head. v

7. Atake-up forsewing-ma'chines,compris ing a rotary carrier having radial guides, op-

positely-located thread-engagin g pins applied to the said guides, a head with which the said pins are connected, an adj usting-disk 'having cam-surfaces to regulate the distance of the said pins from each other, and means'to operate the said head and thereby move the engage and disengage said pins endwise to the thread. i Y

8. A take-up for sewing-machines,comprising'a rotary carrier havinga fixed'head, oppositely-located thread-engaging pins working through said fixed head, a movable head with which the said pins are connected, means to operate the said movable head and thereby project and retract the thread-engaging ends of the said pins at the side of the fixed head, and the adjustingplate having the eccentricslots through which the said pins pass.

9. The rotary take-up consisting of the carrier comprising essentially the fixed head, the oppositely located pins working through openings in the said fixed head,and the movable head with which the said pins are connected, means to rotate the said carrier, the rocker in operative connection with the said movable head, means to operate the rocker, and the spring-pressed follower at the side of the said fixed head.

10. The rotary take-up consisting of the FRANK W. MERRIG K.

Witnesses:

CHAS. F. RANDALL, LEPINE HALL RICE.

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