USRE10269E - thomas - Google Patents

Description

' 2 Sheets-Sheet 1. E. T. THOMAS. G. W. WILLIAMS MANUFACTURING COMPANY, now known as the WXLLIAMS MANUFACTURING COMPANY. I SEWING MACHINE. I No. 10 269. I V 'Reissued Jan. 9,1883.

Assignor '00 jaw/5602;

W @W My v 2 Sheets-Sheet 2 'E. T. THOMAS. Assignor to G. W. WILLIAMS Mmumc'rumm COMPANY, now known as the WILLIAMS Mmumciumm COMPANY. SEWING MACHINE. Reissued Jan. 9. 18835 PATENT- OFFICE.

EDDY T. THOMAS, on NEW YORK, MANUFACTURING COMPANY,

N. Y., ASSIGNOR TO U. W. 'lLLIAMS NOW KNOWN AS THE \VILLIAMS MANUFACTURING COMPANY, OF MONTREAL, CANADA.

SEWING-MACHINE.

SPECIFICATION forming part of Reissued Letters Patent No. 10,269, dated, January 9, 1853.

Original No. 248,530, dated October 18, 1881.

Application for reissue filed November 28, 1882.

To all-whom it may conce rm" Beit known that I, EDDY T. TnoMAs, of

New York, county and State of New York,

' have invented a new and useful Improvement in Sewing-Machines, of which the following description, in connection withthe accompanying drawings, is a specification.

This invention in sewing-machinesrelates to improvements in mechanism for operating the teed, also tomeans for adjusting the strength of the spring controlling the takeup, and also to combinations of mechanical .elements or devices, hereinafter described, and

' particularly pointed out in the claims,whereby the feed and shuttle are moved positively and in theproper time and order. The feed is regulated to control the length .of stitch by means of an adjusting or regulating device shown as a screw) carried by the rotating shaft, which, at the front end, actuates the needle-bar and needle. This feed-adjusting device acts upon and moves longitudinally on the said shaft a conical cam, so thata portion thereof of greater or less radius will act upon an arm ot' an upright lever and vibrate the same a greater or less distance, a second cam I on the same shaft moving the said upright lever longitudinally,thus imparting to the said upright lever such movements as to enable it to move a horizontal universally-pivoted feedlever in such direction that its frontend, in engagement with the usual feed-bar, will raise moved by a vibrating vertical lever deriving its movement/from a cam on the main driven shaft of the machine. The take-up arm, pivoted at the faceof the head-covering plate, is

,acted upon-by one end of a coiled flat spring,

the other end of which is engaged. with anadjusting-lever having its center of motion coincident with that of the take-up lever, the adjusting-lever being shaped to cooperate with a notched lever-holding bar, also secured to the said plate.

Figure 1 represents in side elevation and partial section a sufficient portion of a sewingmachine to illustrate my present invention; Fig. 2, an under side view of Fig. 1; Fig. 3, a sectional detail on the dotted lines a: m, Fig. 1 Fig. 4, a front view of the head-coveringplate and attached take-up and Fig. 5, the take-up lever, its adjusting-lever, and spring, separately. r I

The frame-work A, shuttle-lever I), forked the forked lever, rotating needle-bar-actuatin g shaft 0, fulcrum-points j, and feed-bar g are and may be of usual construction. Y

The feed-actuating lever It has its fulcrum on the same pin or stud, 2', which serves as a fulcrum for the shuttle-lever b. This pin has on it a conical or wedge-shaped bushing,j, which on tcrs a conical seat in the shuttle-lever, the outer or larger end of the bushing being acted upon by the iced-actuating lever h, pressed in contact therewith by an adjustingscrew, k. The outer end of the washer j is rounded, as is also the under side of thehead of the screw k, so that the said feedlever hso or less elliptical path. Wear between the said levers and their supportin g parts may be com- I pensated for by movingthe screw is andconical bushingj. v

The rearend of lever h is loosely engaged or connectedwith the lower end of an upright lever, l, providcdat its upper'end with ahorizontal shoulder, 2, and an upright arm, 3, at right angles thereto. (See Fig. 3.) At its lower end the said lever t has a shoulder, 4, to strike against the rear end of lever h at its upper side, (see Fig. 1,) and the said lever lis slot-ted centrally at 5, (see Fig. 3,) to fitloosely the laterally-extended portion 0 of the upand sliding vertically, or nearly so, on thesaid held may have its outer end moved in a more upright lever c to move it, cam d to actuate right lever c, the lever l rocking or vibrating portion a as a fulcrnn'ras the said lever I moved by the feed-cams ma.

The feed-cam m, which acts on the part 2 of the lever l and depresses it to depress the rear end'ofthe lever h and raise its forward end,

. and with it the feed-bar g, issecured to the shat'te by a suitable set-screw, and is shown in Fig. 1 as made hollow to receive within it the front or small end of the forward-moving feed-cam n, as the latter is moved toward the front of the machine to lengthen the feedstroke and stitch, such hollow cam m materi- 8 of the shaft also receives in it, at the rear of the cama, a gib, p, and one side of the gib is acted upon by the inner end ofthe feed regulating or adjusting screw 1', extended .longitndinally through the rear end oil-shafts, as shown in Fig. 1. A s ring, 0, in the hollowcam m, acts upon and 'eeps the camnpressed against the gib p, and the latter. against the screw 1'. The spiral spring q holds'the upper part of the lever (up against the cams m and n. Adjusting the cam a longitudinally on the shaft 0 by means of the screw 1' and gib p will so place the said cam that a part of it having the proper length ofradius'will act on the arm 3 and vibrate the lever l more :or less for a long or short stitch, t-he'said lever vibrating the lever h more or less,and in unison with it.

I Fig. 4, to take up all the slack possible in the ating lever I) and feed-bar-moving lever It,

These-two cams on the uppermost shaftin the overhanging arm of the machine determine all the movements of the feed. The needle-th read, before entering the eye o'fthe usual needle, is

led through the eye or loop at the lower end of the takeup lever t, of usnalconstruction, which is commonly acted upon by a spring to keep the lever tpressed toward the left,- as in needle-thread. This lever t has its fulcrum at t. The outer end "of the spring u is contoward the lever it increases the force of the springu on the lever t and the force with" i which it acts upon the needle-thread, and vice 6;,The horizontally-vibrating "lever, \the upright vertical lever connected therewith, shaft e, and suitable cams tovibrate the said uprightlever, combined with the horibe made to bear 'against a part of cum a, but

I.pr'efer to retain the said gib.

I claim- 1; The horizontal rotating needlebar-actw" ting sh afte, and its longitudinally-adjustable tapering cam, and cam m thereon, combined/ with the upright lever having the faces 2 3 and shoulder 4, and with the lever h and feed-Bar, substantially as described. l s

2. The horizontal rotating shaftc, the hollow cam m, spring 0, and tapering sleeve-cam a, combined with the feed-adjusting screw fitted longitudinally in the said shaft, substan- 1 tially as described.

3. The horizontal rotating shaft, the adjustin g-screw r, carried thereby, the gib fitted into the slot in the said shaft, and the cam mthere-v on, combined with the adjustable sleeve-like tapering cam a, and with'the upright lever "actuated thereby to impart movementto the cloths-feeding parts, substantially as described.

4. The bed A and the pivoted shuttle-lever I having its fulcrum to hold the said levers fixed withrelation to the said bed, combined with two vertical levers, one to vibrate the shuttlelever and the other to vibrate the feed-actuating lever, and with themain shafts and cams:

to operate the said vertical levers, as and for the purposes described.

5. The adjustable sleeve-like tapering and cam m, combined with the upright lever l, slotted, as described, to both rockand slide on its fulcrum, as set forth.

feed-actuating zontally-vibrating shnttle-carrying lever and the stud i, arranged-to serve as a fulcrum for each of the said levers, substantially asaand for the purpose described.

7. In a sewing-machine, brating shuttle-actuating lever I), combined with the feed-bar-movinglever h, both mounted 8. The horizontally-vibrating shuttle-actuhaving their fulcra on the same pin, 0', comtoo thehorizontally-vion the same pin, i, substantially as described. v

bined 'with'the adjustable conical bushingj 3 and the screw 10, substantially as described 9. The takeup lever and springs u,;con

nected therewith, combined with the lever'w, also connected with and adapted to move the EDDY T, THOMAS;

Witnesses? I G. W. GREGORY, B. J. Novas.

o s" said spring to increase or decrease, its effect f onthe take-up lever, substantially as described}

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