US389094A - Sewing machine - Google Patents

Description

(No Modell) SEWING MACHINE.

J. MOSS & O. B. HUNT.

3 Sheets-Sheet 1.

"mun

Patented-Sept. 4, 1888.

(No Mudel.) 3 Sheets-Sheet 2-.

J. MOSS & O. B. HUNT.

SEWING MACHINE.

No. 389,094. Patented Sept. 4, 1888.

(No Model.) 3 Shets-Sheet 3.

J. MOSS & C. B. HUNT. SEWING MACHINE Patented Sept. 4, 1888.

N ETERS. Phowulhn mr. Wnhinglon. D. c,

UNITED STATES PATENT @rrrcn.

JAMES MOSS AND CHARLES BRANSTON HUNT, OF LONDON, ENGLAND.

SEWiNG-lViACHlNE.

SPECIFICATION forming part of Letters Patent No. 389,094, dated September 4, 1888.

Application filed November 10,1887. Serial No. 254,842. (No model.) Patented in England August 11. 1887, No. H.009.

To CLZZ whom it may concern:

Be it known that we, JAMES Moss and CHARLES Bnnnsron HUNT, subjects of the Queen of Great Britain, both residing at Dufferin Street, St. Lukes, London, England, have invented new and useful Improvements in or connected with Lock-Stitch Sewing-Machines, (for which we have obtained a patent in Great Britain, No. 11,009, hearing date August 11, 1887,) of which the following is a specification.

This invention relates to that class of sewing-machines in which an ordinary reel of thread is employed. under the work-plate for interlocking the loop made by alooper, which looping-thread comes from an ordinary upper reel of thread for eifecting what is known as the loop lock-stitch.

According to our invention we fit to the fore end of an under rotating shafta crank, the op the shaft to carry the looper around the under reel, said looper or hook having a vibrat ory or oscillatory motion to take the loop of the upper thread and to carry it around a shell or casing in which the under reel is loosely fitted, said casing having blades on the face of it and wings on the underside for opening out the loop under the drag of the looper before said looper leaves go of the thread for taking the next succeeding loop, and so that the looper can enter this second loop and at its next travel round the under reel to put astrain and drag on the thread of the previouslynnade loop sufficiently tight to form the stitch. The looper for this purpose is,as before mentioned, on one end of a bar, the opposite end being connected to a link suspended from a stud fixed under the work-plate, from which stud the link has a vibratory motion to govern the motion of the looper, as before explained.

lVc employ a piece of metal to take the formed loop sidewise, so that the needle in coming down may escape it, and to give room for the looper to pass for engaging into the next loop. This piece of metal is on a bracket, and its motion is controlled by a cam on the under shaft, which shaft also, by means of an eccentric and connecting-rod, gives a vertical up-and-down motion to the needle-bar.

In the drawings, Figure l is a broken sectional side elevation of a sewing-machine embodying our invention; Fig. 2, a detail elevation showing the looper at the limit of its upward stroke; Fig. 3, a detail side view showing the looper at the limit of its downward stroke; Fig. 4-, a detail front view showing the looper at the limit of its downward stroke; Fig. 5, detail perspective views of the reelcarrying shell and its supporting-bracket; Fig. 6, a view similar to Fig. 2, showing thelooper midway the limit of its upward stroke; and Fig. 7, a detail bottom plan View.

Referring to Fig. 1, the looper A is shown at the top of its stroke and just engaged in the loop of the thread formed by the first uprising niotien of the needle B, this position being also shown in Fig. 2-. Figs. 3 and 4 show hooked looper A near to the bottom of its course and with the loop spread open pass ing round the shell 0, the loop having been opened out by being brought against the points of the blades .D D, which are more clearly shown in the perspective view, Fig.5, so that the widest part of the thread passes between the shell and the supporting bracketplate E. The looperA, continuing its motion, drags the bottom part of the loop against the two wings F F and between the shell 0 and the shoulders G G, the drag being sufficient to lift the shell containing the under reel for the looping-thread to pass to the hack of the shell, as indicated by Fig. 6. The hook by this time approaches nearly to a vertical position by the combined motion of the crank H and bar I, pivoted thereto, as the crank is rotated by the shaft J by gearing K L at the back of the machine. When the hook arrives in the position last mentioned, and as shown at Fig. 6, the loop-thread slips off its point, leaving the loop in the position shown at Fig. 2. At this moment the needle descends, and at its first uprising motion the hook has risen, as indicated at Fig. 2, to take the next loop round the shell G, which contains the under reel, and as the hook comes forward with the loop it brings the loop into contact with the blades D l), dragging the thread of the previouslyexpanded loop for forming the stitch.

M is the link, to which the bar I is com ,the work, so that the loop is inclined or forced slightly to one side of or out of the center of the shell 0, said loop beingleft there when the reverse motion of R takes place, the under-reel thread by its tension following the piece R to get into position again for the interlacing of the next looping. This throwing aside of the loop keeps it clear of the hook or looper A while traveling round the lower reel and its shell 0. \Vhen the loop is released by the hook, it is spread and is resting in and held between the shell 0 and the casing E; but the right-hand free port-ion, which is above the shell 0, has a tendency to follow the piece It when moving back, but is prevented doing so by the tail R". The piece of metal It, centered at It, is operated by a lover, S, the stud of which rides in the cam T.

As the loops are made in succession, each of them has sufficient thread for the hook to take up and make the stitch, the proper quan- It will be observed by Fig. 1, which is a view of a complete machine, that we use one shaft Jonly, and this, by eccentric U and connecting-rod V, gives straight up-aud-down motion to the needle-bar W by its connection with the horizontal rocking bar X.

WVe have not shown the feed-motion, that being of the usual kind, operated by the cam or pawl Y, also carried by the rotating shaflrJ.

Themachine may be worked by hand or by treadle motion.

We are aware that ordinary reels of thread have been used as the under thread in sewingmachines for loop lock-stitching, and that said reels have been carried by bracket-plates, and that hooks have been employed for forming theloops and carrying them round said under reels. Therefore we make no claim to the employment of under reels, nor to bracket-plates, nor to books for the purpose, except when the thread-operating parts are arranged as shown on the annexed drawings, and the motions of the hook controlled from a crank-arm on a revolving shaft fitted longitudinally under the work-plate.

What we claim, and desire to secure by Letters Patent, is

1. The combination, with a work-plate, P, and the verticallymovable needlebar \V, carrying the needle B, of a horizontal rotating shaft, J, arranged thereunder, and having at one end a crank-arm, H, rotating in a vertical plane, a link, M, pivoted at its upper end, the bar I, pivoted to the lower end of said link and at its other end portion pivoted to the crank-arm, and provided with the hooked looper A, for oscillating the looper while it moves in a circle, the open bracket E, and the reel-carrying shell 0, movable in a vertical plane parallel to the vertical plane of the needle, and provided with the pendent wings F, and lateral dividing-blades D, extending through the bracket,substantiall y as described.

2. The combination, with the work-plate P and needle-bar W, of the horizontal rotating shaft J, arranged below the work-plate, and provided with the cam T and crank-arm H, the oscillatinglink M, pivoted at itsupper end, the bar I. pivoted at one end to the lower portion of the link and at its other end portion pivoted to the crank-arm, and provided with the looper A, the pivoted piece R, having the tail R and curved end B, the pivoted lever S, engaging the cam and loosely connected with said pivoted piece, the supporting-bracket E, secured to the work-plataand the rising-andfalling reel carrying shell 0, arranged in the bracket, substantially as and for the purpose described.

3. The combination, with the needle-bar W, carrying the vertical needle B, the hooked looper A. and mechanism, substantially as described, for moving the looper in a circle and at the same time oscillating it on a center, of the pendent bracket E, open at one side and having the shoulders G at its lower portion, and the reel-carrying shell 0, movable vertically in a plane parallel to the plane of the verticalneedle,andhavinglaterally-projecting dividing-blades D at one side, and depending inclined wings F, extending through the bottom of the bracket, substantially as and for the purposes described.

. 4:. The combination, with the needle-bar \V and needle B, a looper, A, and means for revolving and oscillating the looper, of the lower reel-carrying shell, 0, the pivoted piece It, having the tail R and curved end B, the pivoted horizontally-oscillating lever S, loosely engaging the said pivoted piece, and means for oscillating the lever, substantially as and for the purposes described.

In witness whereofwe have signed our names in the presence of two subscribing witnesses.

JAMES MOSS. CHARLES BRANSTON HUNT.

Witnesses:

RICHARD CON GARDNER, 166 Fleet Street, London, England.

R. D. BLOOMFIELD, 19 Change AlZey,Lond0n,E'. 0., Notarys Clerk.

ICO

IIO

Images