US476456A - Sewing-machine - Google Patents

Description

N M d l. 8 H. H. FEPEL.

SEWING MAGHINE.

No. 476,456. Patented June 7, 1892.

NITED STATES A'rnNT FFICE.

HENRY n. FEFEL, OF NEW YORK, N- ASSIGNOR To THE UNION SPECIAL SEWING MACHINE COMPANY, OF ILLINOIS- SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 476,456, dated June '7, 1892. Application filed July 23, 1891. gerial No. 400,447- (No model.)

T (0% whom, it may concern,-

Be it known that I, HENRY I-I. FEFEL, of the city and county of New York, and State of New York, have invented an Improvement in Sewing-Machines, of which the following is a specification.

My invention relates to sewing-machines; and it consists of certain improvements which are fully set forth in the following specification and are shown in the accompanying drawings, which form a part thereof.

More particularly my invention relates to that class of sewing-machines in which two needles are employed to form two rows of stitches on the face of the fabric and known as the twin-needle machine. Such a machine is shown in Letters Patent to Lorenz Muther, No. 344,492, dated the 29th day of June, 1886. In that machine two needles are employed, together with a looper, the two needles carrying their threads through the fabric and forming loops on the under side thereof, which are entered by the looper carrying a locking-thread. By this operation there are formed upon the face of the fabric two parallel lines of stitches.

My invention consists of improvements upon the machine disclosed in that patent adapted to carry the threads of one of these rows of stitches under and about the stitches of the other row, thereby producing a highlyornamental stitching effect and interlocking the threads more securely.

In carrying out my invention I employ a reciprocating arm, which is adapted to move forward and catch the thread of one needle forming one of the rows of stitches and carry it forward to form a loop about the thread of the other needle, which forms the other row 40 of stitches. The threads of one row of stitches are thus looped about the threads of the other row and pass over the face of the fabric between the two lines of stitches, producing a pleasing effect and thoroughly locking the threads in place. This stitching maybe used upon any character of work. It forms an effective binding suitable for knit goods, leather hatbands, &c. 'When used for these purposes, the row of stitches of which the loops are made is formed over the edge of the fabric.

In this application I do not claim the method of stitching fabrics herein described, as that forms the subject-matter of another application, Serial No. 400,448, filed in the Patent Office at Washington on the 23d day of July, A. D. 1891.

In the drawings, Figure l is a side elevation of a double-needle sewing-machine having my improvements applied thereto. Fig. 2 is a perspective view, on an enlarged scale, of the needles, looper, and looping arm with portions of their connections. Figs. 3, 4, 5, and 6 are perspective views of the needles and looping-arm in successive positions in forming my improved stitch. Fig. 7 is a plan view of a portion of fabric having the stitches ap plied thereto as formed by my improved machine. Fig. 8 is an inverted plan view of the same, and Fig. 9 is a perspective View of a portion of fabric having the same stitches applied thereto to form a binding.

Referring first to the general parts of the machine for forming the double row of stitches, A is the needle-bar-actuat-ing arm.

B is the needle-bar carrying the two needless a D is thelooper-frame, carrying the two-eyed looper cl.

E is the pitman between the needle-bar-actuating arm A and the looper D. i

F is the presser-foot, having guides for each needle.

G is the feeding-bar.

The needles a and b and twoeyed looper (I operate in the manner described in Letters Patent of the United States No. 34t,492,heretofore referred to, normally forming upon the face of the fabric two rows of straight parallel stitches, with loops upon the under side locked together by the locking-thread of the looper (Z. The under side of the fabric, with these stitches, is shown in Fig. 8. Threads 1 and 2 are respectively the threads of the needles a and b, and thread 3 is the thread of the looper d. The needle to is longer than the needle 1), so that its point projects lower than the point of needle I).

I will now describe myimprovements as applied to a machine of the above character and the manner of operation thereof.

11 is a looping-arm formed with a fork or ICO notched end h to catch the threads. Thelooping-arm II is preferably formed with forked ends formed by the prongs ij, one of these prongs being longer than the other, as shown, and the forked end may be formed with a groove between the prongs adjacent to the notch 71 to permit the point of the needle a to pass. A reciprocating and slight lateral motion is imparted to thelooping-arm H to move it forward while the needles (4 and Z) are raised, so that the notch h thereof may engage and move the threads.

It is immaterial to my invention, when broadly considered, by what particularmeclr anism this movement is imparted; but since it must be timed with the operation of the needles a and Z"; I prefer to have the loopingarm H carried by the looper d, as shown, so as to operate synchronously therewith. This insures the proper timing of the movements of the looping-arm and avoids the duplicating 0t connecting mechanisms. Considering the looping-arm H as carried by the looper d and moving with it, I shall now describe its operation.

\Vhen the looper (Z is in its extreme position to the right and the needles a and b have passed through the fabric, the looping-arm H is also in its extreme position to the right. \Vhen the needles rise and the looper moves forward, the looping-arm II also moves for ward through the path of the needles and engages the thread 2in the notch h and draws it over. Upon reaching the thread 1 it engages that also and carries both threads together in the notch 71, as shown in Fig. 3,moving beyond thelongerneedle a. The loopingarm II now has a slight lateral movement or movement in a direction opposite to that of the feed of the machine with the looper (Z and moves on one side of the line of the needles a b and then begins to move back, as shown in Fig. 4. The thread 2 of the needle Z) is thus looped about the needle a. Synchronously with the backward movement of the looping-arm H the needles a I) begin to descend. As the l0oping-arm H moves back the thread 1 of the needle slips from the prong 'L' of the arm, leaving the thread 2 looped about the needle, as shown in Fig. 5. The needle a descends through the fabric within this loop of the thread 2, (which is released as the looping-arm continues to move back,) forming the stitch within the loop, as shown in Fig. 6. The operation is repeated as before, and the line of loop of the thread 2 is formed about the stitches of the thread 1, as shown in Fig. '7

In Fig. 9 the stitch is shown formed upon the edge of the fabric to make a binding. The operation is similar to that heretofore described, with the exception that the needle 1) passes over the edge of the fabric instead of through it.

\Vhile I prefer the minor details of construction which have been here shown, I do not limit my invention to them, as they may be modified in many ways without departing from it.

Having now described my invention, what I claim as new, and desire to secure byLetters Patent, is

1. In a twin-needle sewing-machine, the combination, with the reciprocating needles and the cloth-feeding devices, of the vibrating looper (Z, means to vibrate said looper (Z transversely to the feed and also in a direction opposite to the feed, and a looperarm H, connected with the means for vibrating the looper (1, whereby said arm H is vibrated synchronously with the looper (Z.

2. In a sewing-machine, the combination of the reciprocating twin needles,thecloth-feeding devices, the cloth-plate, a vibratinglooper located under the cloth-plate, means to vibrate said looper transversely to the feed of the machine and in a direction opposite to the feed, and a looper-arm H,carried by the looper under the cloth-plate and vibrating therewith and having its end projecting above the clothplate adjacent to and in line with the needles.

3. The combination, with the looper of a double or twin needle sewing-machine, of the looping-arm H, carried thereby and having the forked ornotched end 72 to catch the thread, the prong 1' adjacent to said notch, and the groove 7s.

In testimony of which invention I have hereunto sct my hand.

HENRY I'l. FEFEL.

\Vitnesses:

CHARLES W. DARLING, J OHN H. I-IowELL.

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