US405228A - Sewing machine for securing stay cords and thrum ends - Google Patents

Description

2 Sheets-Shet 2.

(No Model.)

A; SHEA. $EWING MACHINE FOR SECURING STAY GORDS AND THRUM ENDS.

Patented June 11, 1889.

UNITED STATES PATENT OFFICE,

ALBERT sum, or nosToN, MASSACIIUSE'MS, AssIeNoR To Joun REESE, OF

' SAME- PLACE;

SEWING-MACHINE FOR'SlECURING STAY-CQR'DS AND THRUM ENDS.,

SPECIFICATION forming part of Letters Patent No; 405,228, dated un -11, 1889, Application fild April 11, 1888 emu No. 270,329. on. may

To all whom it n my concern: I

Be itknown that I, ALBERT SHEA, of Boston, county of Suffolk, State of Massachusetts, have invented an Improvement in Sewing-Ma- 5 chines for Securing Staying and 'lhrum Ends,

of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention has for its object the production of a machine by which toeasily overstitch and secure to one side of a piece of material a stay-cord and thrum ends.

pointed needle is made to enter the material and emerge therefrom at one and the same side thereof, and the loop of thread carried by guide or bar, while thefeeding device-preferably a serrated dogengages the material at the under side, of the said guide or bar and moves it, the needle and the feeding. device and guide or bar havinga movement one with relation to the other in such manner that the needle at one thrust or descent enters the' material and emerges therefrom at one and the same side, and at one side the st' y-cord and thrum ends, the next descent or thrust of the needle performing the" same operation, but at the opposite side of the stay-cord and thrum ends.

"My invention consists, essentially, in the o. combination, with stitch-forming mechanism and feeding mechanism, of a bar or guide inteilposed between the feed and presser-foot, an over which the material to be stitched is bent, the needle forming part of the stitching 5 sewing-machine .forsecuring the stay-cord.

foot resting upon the said material on the said:

mechanism in its descent passing alternately into and out from the same side of the mate-- and thrum-ends to button-pieces, the following instrumentalities, viz: an eye-pointed thread -carrying needle and complemental stitch-forming mechanism, means to collect the-thrum ends parallel to and about the staycord, a guide or bar having its effective endat right angles'to the direction of the feed, and a feeding dog or device to engage and move the material, the needle in itsoperation entering the material and emerging therefrom at one and the same side thereof, and at one side of, the collected stay-cord and thrum- I ends, and at its next descent entering said In accordance with my invention an eyematerial in like manner, ,but'at the other side of the collected stay-cord and thrum ends,

the combination being and operating substantially as will be described. j Figure 1 is a front side elevation ofa suf- I ficient portion of a sewing-machine with my improvements added to enable my invention to be understood. Fig. 2 is a partial section in the line a:,Fig 1. Fig. 3 is a left-hand end elevation of the machine shown in Fig. -1,partially broken out. Fig. 4 is a partial top view of the bed of the machinebelow dotted line 0a, chieflyto show the guide orbar upon'which reststhe material to be stitched. Fig. 5 is an enlarged detail of the locking-arm, instrumental in vibrating the needle-carrying head or block; 'Fig. 6, a section of Fig. 5 in the-line 8o 00 Fig. 7, a detailshowing the end of the guide or bar with a piece of materialbent over it .in condition to be penetrated by the descending needle; and Fig. 8 is a detail showing. the shape of the front end of the. pivoted guide or bar 0 1 The bedlate A, the overhanging arm A, a

' the needle-bar A, adapted to be reciprocated in the needle bar-guiding blocli' or head A, pivoted at 2 upon point-screws,'the main shaft "96 A extended through the-overhanging armto actuate the needle bar, the vertical shaft A, (shown in Fig. 1,) it having at its lower end a disk B, the connecting-rod B, attached-tothe rocking lever 13*, having its fulcrum at B and 9 5 connected with an arm B, fast upon the shaft, having at its upperend'the shuttle-carrier B (seeFig. 4,) thefeed-bar B,with the excep tion of the direction'i n which its teeth point, and the toothed gear a on the shaft A, the, loo:

; right it acts to lift the free end of the bar 0 cord being permitted to cxtendfrom one to the next button-hole of the series, it passing along and connecting the inner ends of the operator.

.it being understood, however, that the head carrying the needle-bar is vibrated in the arc of a circle about its pivotal point 2 prior 'to the descent of the needle in making each stitch, so that the needle penetrates the material in such manner as to make what is well known as an. overstitch. To adapt this machine to perform the special work of securing stay-cords and thrum-ends to button-hole pieces for boots and shoes by a blind stitch, which will not penetrate the material, I have had to change the machine referred to by removing the crank-pin b carried by the disk 13 to a point diametrically opposite that at which it stands in the machine referred to, and in place of the 'usual feed-dog I have applied to the machine another feeddog exactly like it in cveryparticular, except that the feeding-points are extended toward the operator rather than away from him, as; in the said machine, these changes enabling 1 terial so folded and emerge from the same the feed to engage the material and feed toward the operator rather than away from the I To the body of the machine so i q altered I have secured by,a bolt 0 a-block O,

upon which, by pivot-screws G I have pivand receiving upon it the presser-foot I). The bar 0 is acted upon by a spring ,Gflwhich normally keeps the front end of the bar f pressed down toward the feed, the lever having a cam-like end, so that when turned over from its position, Fig. 1, fully to the away from the feed to permit the work to be applied.

, In thestitching of button-holes in buttonhole pieces for boot and shoe work the button-holes are overstitched, and the overstitching going around the edges of the button-hole also cover and inclose at the under side of the material a stay-cord, the said stayl ll b n-holes.

In the stitching of button-holes, as desc ib d,

riedJJy ainee lo and the other by a shuttle and when one button-holehas been stitched and the material is to be moved into position to have a second button-hole stitched the nee-' dle-thread is cut off, leaving an end attached to the work; but the shuttle-thread is not cut,

it beinglcft to extend parallel with the staycord, as described, to the next button-hole. After the button-holes have been completed in the button-piece, it becomes necessary to confine the stay-cord and the end of the needle-thread, which are denominated thrum ends, to the under side of the material, and it is the object of my present invention to do this automatically in a novel manner. A button-hole piece having had its series of buttonholes overstitched, as described, will be taken to the machine herein described, and the button-hole piece will be folded at one end over the end of the guide or bar C parallel to the length of the buttonholes, and so as .to leave-' the stay-cord substantially in the line of the descent of the needle, the main body of the material lyingabove the guide .0 andhetweenf it and the presser-foot D. It-wil1 be noticed in ,Fig. 4 end of thepresser-foot is cut out, leavin a that the front V-shaped opening, which by its converging the needle 6, it being supplied in usual manner with thread, will pass through the inaside thereof,but without penetrating through to the opposite side of the material, the loop of needle-thread will be locked in usual manner by the shuttle-thread. Then the needle .will rise,- the feed will act to move the material for the length of a stitch, and the neodle-bar-carrying head will be swung upon its pivot, so that at the next descent of the needle it Will again penetrate-the material in like manner, but at the opposite side of the staycord and thrum ends, and a stitch will be made, this operation being repeated until the stay-cord and thrum ends throughout the length of the button-piece have been covered by stitches made from the needle and shuttle thread. i r a The method of operation herein described LOO is more fully explained in and made the sub- 1 24th day of March, 1888, and the button-piece such as herein described forms thesub'iectmatter of a patent of the United .States, No.

380,731, dated April 10, 1888. i

The guide, 0 has to be adjusted forward and backward with relation to'the ,neeldle,

according to the depth that it is desired the needle shall penetrateinto the materialfrom the under-side of the hutton-piece arndto accommodate for this'the adjusting-screws 0 i which are threaded into the ears of the bar or guide .O and rest against the block (3, may

,The shape of the front end of the bar 0 over which the button-piece is folded, is'best shown in Fig. 8;

I clain1 v t 1. -In a machine for stitching stay-cords and thrum ends, stitch -forming mechanism and feeding mechanism to produce an 'overseaming-stitoh, the feeding-bar having its teeth formed to move the 'material toward the toe of the presser-foot, combined with a presser D and thruin-gatliering surfaces, and with the bar or guide 0 interposed between the feed and presser-foot and over Which the material to be stitched is bent, as described, whereby the needle at one descent is made to enter and emerge from the same side of the material at one side of the stay-cord and thruln ends, and at its next descent to enter and emerge from the same side of the material, but at the opposite side of the said stay-cord and thruni ends, to operate substanti ally as described.

2. In a sewing-machine for securingv the v stay-cord and thrnm ends in the stitching of talities, viz: aneye-pointed thread-carrying needle and complemental stitch forming and feeding mechanism to produce an overseaming-stitch as desired, means to collect the thrum ends parallel to and about the staycord, a guide or bar having itsv effective end at right angles to the direction of the feed of the material, the needle in its operation 'entering'the material and emerging therefrom at one and the same side thereof, and at one sid e of the-collected stay-cord and thrum ends, and at its next descent entering said material in like manner, but at the other side of the collected stay-cord and thrum ends, the combination being and operating substantially as described. I

In testimony whereof I have signed my name to thisspecification in the presence of two subscribing witnesses.

- ALBERTSHEA v Witnesses:

G. W. GREGORY, O. M. CONE.

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