USRE10466E - Button-hole sewing-machine - Google Patents

Description

FIDY Q 55 10 4 Sheets-Sheet 1. P. W. GROSS.

BUTTON HOLE SEWING MACHINE. No. 10,466. Reissued Apr. 8, 1884.

PUER W. W n, a

4 Sheets-Sheet. 2.

F. W. GROSS.

BUTTON HOLE SEWING MACHINE.

No. 10,466. Reissued Apr. 8, 1884.

Irank W 'ross,

yMJW I attorney.

4 Sheets-Sheet 3. P. W. GROSS.

BUTTON HOLE SEWING MACHINE.

Reissued Apr. 8, 1884.

v Invader.- Iran]: W Cross:

Witnesses:

fl'liorney.

1 Puma mum Wm n. c

4 Sheets-Sheet 4.

F. W. CROSS.

BUTTON HOLE SEWING MACHINE.

Reissued Apr. 8, 1884.

Lwenior: Frank W Cross:

u. man s. M WM 0. c.

35 tial sectional FRAnK w. onos's, or LYNN, MASSACHUSETTS.

BUTTON-HOLE S/EWIINGHMAHCHINE.

SPECIFICATION forming part of Reissued Letters Patent No. 10,466, dated April 8, 1884.

Original No. 179,349, dated June 12, 1883. Application for reissue filedFebrnary G, 1884.

To all whom it may concern! Be it known that I, FRANK W. Guess, of Lynn, in the county of Essex and," State of Massachusetts, have invented certain new and useful Improvements in Stop-Motion Attachments for Sewing-'lvlachines, of which the fol- .lowing, taken in connection with. the aeconr panying drawings, is a specification.

' My invention relates to stop-motions for no sewing-machines, and is designed primarily for use upon'hutton-hole sewing-machines, though .it may be adapted to use upon all 'power sewing-machines, and has for its ob- ,ject the instantaneous stopping of the machine I5 whenever the thread breaks; and it consists. in certain novel devices and combinations and arrangements of parts, which will be best understood by reference to the description of the drawings, and to the claims to be hereinafter given. v :Figure 1 of the drawings is a plan of a machine embodying my inveutien tife'bench upon which the sewing-machine is supposed to be mounted, and beneath which the counterf2 5 shaft is placed, being omitted for the purpose. of the .better showing the several parts of the invention. Fig. 2 is a vertical transverse seetionon' line as a: 'on Fig. 1. Fig. 8 is a rear side elevation of the sewing-machine without the counter-shaft. Fig. 4 is a front side elevation. Fig. 5 is a partial section on line 7 '1} on Fig. 1. Fig. 6 is a partial section on line 2 fl; on Fig. 1.' Fig. 7 is a sectional planof the brake-shoe and its stand. Fig. Sis a parend elevation, drawn to an enlarged scale, the cutting-plane being on line v v onFig. 4; and Fig. 9 is an elevation of the 'shipper-leverdetached from the machine.

.A is the bed or main;table, B the goose- 40 neck G/fiie removable work-plate, and D the: work-clamping plate, of a, Singer button-hole sewing-machine. j The table is pivoted to the stands Ezand E, which are firmly secured in the appropriate positions upon the bench F. Gris the counter-shaft,mounted in bearings in the stands EH, secured to the iioor of the building beneath the bench F, and at the rear of the back edge of the table A, as shown-in Figs. 1 and2. lheshaft G has secured thereto o the disk I, amfhas loosely fitted thereon, in 1 nearigproximity to said disk I, the grooved pulley l-,L izp;0vided' with a circumferential Division B.

groove, a, in its hub, with which the forked end of the elbow shipper-lever J' engages, as shown, a friction-pad in the form of a leather disk, I), being placed between the disk I and the pulley I as a means of revolving'tlie pulley I when it is pressed hard against the disk Iby the action of the shipper-lever J. Motion is imparted to the shaft G by means of the pulley K and a suitable belt (not shown) leading therefrom to a main shaft or other prime mover.

L is a treadledever pivoted at c to the stand L, and connected atits rear end to the hori- 6 5 zontal arm of the shipper-lever. J. and having its front end in a convenient position to be acted upon by the operators foot while setting at the machine and manipulating the work to y be acted upon with his or herhands.

The fly wheel N has formed in its rim a groove to receive the belt l l-,which leads from the pulley I, and by which the wheel N is revolved.

M is a brake-shoe shaped to lit the side of the rim of the fly-wheel N, and mounted by its horizontal shank Min the stand M",secured tothe backside of the goose-neck B, and pressed into contact with the wheel N by the spring 1, the tension of which may be regd S0 lated by means of the set-screw d, as shown in Fig. 7.

O is an elbow-lever pivotedat c to the back edge of the table A,with its short arm proj ecting upward in a position to bear against the S 5 side of the pin f, set in the side of the shank of thebrake-shoc M, and projecting through the slot y, formed in the stand lVl'fl-zrll as shown in Fig. 3; The lever is made preferably of sheet-steel, so that it may readily be sprung" 0 horizontally, and has the oud of its long orf horizontal arnr arranged to engage with the catch Q,when depressed, to remove the brakeshoe from contact with the wheel N, said catch being secured to the rear edge of the table As, 5 ass'hownin Figs. 1, 3, and 6. The long arm of the lever O has pivoted thereto one end of the connecting-rod l, the other end of which is pivoted to thetreadle-lever I1, shown in Fig. 2. r I LO 1% is a locking-bolt having its bearings in the eurj oi the stand M", and on the screw 75, set in the goose-neck Bpsaid bolt being provided with the downwardly-projecting arm R in pressed by the treadlc so as to engage with v the catch Q, and the brake-shoe has been removed from contact with the fly-wheel, said bolt will be moved backward by the spring Z till its rear end is interposed in the vibratory path of the'short arm of said lever 0, so as to prevent the brake-shoe from being moved into contact with the fly-wheel,when the lever Ois released from the catch Q,nntil the bolt-R is withdrawn from the path of the lever O.

S is a ring or collar adjustably secured to the hub of the fly-wheel or its shaft by the set screw Z, and carrying the arm or pin in, pro jecting therefrom parallel to the axis of revolution of the wheel N, and adapted to strike the arm It of the bolt R at each revolution of said wheel, and move said bolt toward the front of the machine a sufficient distance to re move its rear end from the path of the vertical arm of the lever 0, said collar and pin being in effect a cam for moving the boltR It. The ring or collar S and its arm or 7 so adjusted about its axis of revolution as to accurately time the movement of the bolt It, so as to stop the machine when the needle has just left the work on its upward stroke afterhaving descended through the samc.

I11 some b'utton-hole sewiilgmachincs the fly-wheel N is mounted directly upon the needle-bar-opcratingshaft, in which case, in order to apply my improvement, the collar S and its pin m would of necessity have to be applied to a diifcrent shaft from that on which the flywheel is mounted, as said collar and pin should make only one revolution to two revolutions of the ncedlchar-operating shaft.

All of the parts hereinbcfore described are shown and described in another application of mine, filed in the United States Patent Oliice December 1, 1888, and numbered 113,342, of which this application is a division, said parts being described and shown in said other application as in combination with and operated by the w0rk-clamping mechanism D for stopping the machine at the end of the buttonhole, and certain claims are lnade in said other application covering said combinations and operations; but in working button -holes in leather work, or in sewing upon leather, it is' very desirable that the necessity for sewing.

twice over the same track should be avoided as much -as possible, on account of the danger of spoiling the work by. cutting the stock by too manyperforations. This is likely to occur every time that the thread breaks, and hence the necessity of a stop-motion that may be operated by the breaking of the thread and adapted to stop the machine when the needle has just left the work on its upward stroke alter having descended through'the same. 7 To accomplish this I mount the rod T in bearings in the front and rear ribs of the tableA, with its rear end in contact with the pin it may be inner surface of the lever 0 when it is engaged with thejeatch Q, and provided at its] front end with the knob T, uponthe'front face of which bears one end of the lever U, pivoted at a to the front edge of the table A,

at right angles thereto, and so arranged that its inner end may be moved vertically in 3.

and having pivoted to its other end the link U l plane corresponding to the plane of move- 'R is fitted the screw 8 in such a manner that it may be adjusted so that the outer end of its head may be at a greater or less distance from .the axis of motion of the. pin m to insure its moving the link U the desired distance to unlock the lever 0 from the catch Q through the medium of the lever U and rod T.

The inner.end of the link U is guided in its upward and downward movements by the slotted standard V, and when the machine is properly threaded its inner end is maintained in the elevated position shown in Figs 2 and 8 out of the path of the screw-head s,- but if at any time in the progress of the work the thread it breaks or becomes slack by reason of the breakage of the needle, the inner end of the link U will drop of its own weight to'the bottom of the slot in the standV,'as indicated in dotted lines in Fig. 8, when its inner will be directly in the path of the screw-head s, and

at the next movement of the bolt R, caused by the contact therewith of the pin m, said screwhead will strike the link U, and, moving it endwise, will thus cause the leveriU to be vibrated about its fulcrumand push the rod T toward the rear of the machine, thereby releasing the lever 0 from engagement with the catch Q, and permitting the brake-shoe M tobe throwninto contact with the rim of the flywheel N at the same instant that the pulley I is moved away from the disk I, and thus rendered inoperative, and the needle-bar is instantly brought to a standstill;

I have illustrated this invention asapplied to a button-hole sewing-machine; but it may with equal propriety be applied to ordinary sewing-machines, as it is not dependent upon the movement of the work-clamp, and hence I I do not wish to be limited to its use on buttonhole sewing-machines. y l? The operation of my invention will be read--- ily understood from the foregoing, and therefore need not be further described here.

I do'not claim in this application anything herein shown and described that is claimed in my other application hercinbefore referred to; but r Vhat I claim as new, and desire to secure by Letters Patent of the United States, is-' l. The combination, in a sewing-machine,

' of a spring-pressed brake-shoe, a lever for re said push-r0d endwise by the retractivc move% ment of the locking-bolt whenever the thread breaks, substantially as and forthepurposes described.

2, The combination of the brake-shoe M, the lever O, the catch Q,the locking bolt R R, the adjustable screw s, the cam S m, the rod T, the levers U 19, the link U, and rod 0, all arranged and. adapted to operate substantially as and for the purposes described. 5

3. The combination, in a sewing-machine, of a fly-wheel, a brake-shoe arranged. to en- .gage with said 'fly-wheel, and to be pressed thereon. by a spring, and to be retracted by the operator, a device for automatically locking said shoe in its retracted position, mechanism for automatically releasing saidbrake shoe independently of the movement of the work-clamp, a mechanism connecting said locking device with a threadguide, and adaptedto be acted upon by said releasing mechanisnrto release the brake-shoe and stop the ma shine when the thread breaks, substantially as and for the purposes described. \Executed at Boston, Massachusetts, this 4th day of February, A.D.-1S84.

a p FRANK W. onoss.

\Vitnesse's:

N. O. LOMBARD,

I \VALTER E. LOMBARD.

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