US445122A

US445122A - Machine

Info

Publication number: US445122A
Authority: US
Publication date: 1891-01-20
Anticipated expiration: 1908-01-20

Description

(No Model.)

L MUTHER SEWING MACHINE.

No. 445,122. Patented Jan. 20, 1891.

Snow 1, 60;

UNTTED STATES PATENT OFFICE.

LORENZ MUTHER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE UNIO SPECIAL SE\VING MACHINE COMPANY, OF SAME PLACE.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 445,122, dated January 20, 1891.

Application filed January 2, 1889.

To all whom it may concern:

.ie it known that I, LORENZ )I'UTHEE, of Chicago, county of Cook, State of Illinois, have invented an Improvement in Sewing Machines, of which the followingdescription, in connection with the accompanying drawings, is a specification, like letters and figures 0n the drawings representing like parts.

This invention has for its object to improve that class of sewing-machines represented in I nited States Patent No. 344393, dated June 29, 1886.

In this my present invention I have provided the throat-plate with a needle-deflector located a short distance below the throatplate, the said deflector having tapering surfaces against which the points of the two needles employed will strike if deflected out of their proper path by any hardness or inequality of the material, the surfaces of the said deflector directing the said needles into a slot thereof side by side, so that both loops of thread thrown out from the eyes of the needles may be entered by the thread-carrying looper. The needle-deflector is so constructed that the parts thereof containing the inclined surfaces may separate one from the other. The looper near its heel is provided at its inner grooved side with a notch to leave a shoulder which catches and holds the loop of needle-thread as the looper moves backward, thus drawing the loops of needlet-hread outof the way of the needles as they again descend through the material to enter 3 5 the loop of thread carried by the looper. To prevent the loops of needle-tread held upon the looper as the latter is retracted or drawn out of the said loops of needle-thread from being drawn forward by the strain of the thread, so as to get in the Way of the descending needles which are about entering the loop of the looper thread, I have provided the throat-plate at its under side and at the righthand side of the needle -hole with a trans- 4 5 verse depression or groove and a linger against which the loops of needle thread arrive and bear as the points of the needles descend between the looper and looper-thread, the outer or free end of said finger substan- 5o tially holding the said loops until the point of the looper in its backward movement comes Serial No. 295,266. (No modeL) to the finger, the outer end of the finger projecting over said depression.

The particular features in which my in vention consists will be hereinafter pointed out in the specification and included in the claims at the end of the specification.

Figure 1 is a partial side elevation of a sewing-machine embodying my improvements, the cloth-plate being in section, the npperpart of the frame of the machine and the needlebar-actuating lever and needle-bar being omitted. Fig. 2 is an under side View of the throat-plate with my improved needle-deflector and finger attached thereto. Fig. 3 shows a needle-deflector in perspective, right side up, and Fig. I shows the looper in diiferent views.

The frame-work of the machine, the main shaft C, the needle-bar-actuating lever B, but partly shown, the rocker-frame A having the pivot 71?, upon which vibrates the arm 5, which receives the shank of the looper, the stud 6, forming part of the said arm and having fitted over itone end of the connecting-rod A, 75 which at its other end fitted over a pin at the lower end of the lever B, the forked arm A connected with one of the journals of the rocking-frame A the said forked arm embracing an eccentric on the shaft C, the throatplate T, and the needle-bar c and its two needles CL 1) are and may be all as in United States Patent No. 34:4,493 referred to, wherein like letters are employed to designate like parts. 5

In accordance with my invention I have provided the throat-plate at its under side with a needle-deflector (Z, consisting of a yokelike piece of material extended from a block (Z, attached by a screw (Z to the throat-plate T. This deflector has inclined surfaces, as 20, at the inner sides of arms extending fron'ian eye portion (1 which has a certain amount of elasticity, so that the said arms under strain may be made to spring or somewhat separate one from the other. By the employment of the deflector, should the points of the needles a b be deflected by reason of any hardness or inequality of the material so as not to i. correctlyenter the slot 22 between the arms :00 of the deflector, then the needles, by striking just above their points against one or the other of the inclined surfaces of the deflector, will be made to enter the said slot 22, and will stand there while the needle-baris down side by side in proper line, so that the looper h, as it is moved forward, will correctly enter the loops of needle-thread thrown out from both of the said needles.

The deflector referred to (see Fig. 1) is located sufficiently below the throat-plate as to permit the looper h to pass between it and the throat-plate when entering the loops of needle-thread. The looper has two eyes 3 4, one near its heeland the other near its point, and the looper is grooved, as at 2, between the said eyes at its inner side to receive the straight thread not a loop yet, the thread entering first the eye 3 and then out through theeye 4 to the stitch-forming point. The looper at its inner side is notched near its heel to leave shoulders 12. The throat-plate at its right-hand side or its side nearest the heel of the looper is provided with a depression or shallow transverse groove 9, Fig. 2, and a finger, as n, composed of a piece of wire attached by a screw n, the point of the said finger lying close to the right-hand side of the needle-hole (marked 71 in the throat-plate T, (see Fig. 2,) and extending partially over the depressed portion to leave a space between the under side of the throat-plate and point of the finger.

Referring to the drawings, Fig. 1, it will be supposed that the looper provided with a thread is just about to enter the two loops thrown out from the farther sides of the two needles a and b. After the point of the looper gets into the loops of needle-thread, the needles in their upward movement are withdrawn from the material, and the looper is moved forward or to the left until both loops of needle-thread come into the notch at the heel of the looper and back of the shoulders 12. In this condition, while the needles are yet out of the material, the rocking frame A is rocked to move the looper bodily toward the operator, or in a direction opposite that of the feeding-movement given to the material, and then the looper is moved in the direction of its length back out of the loops of needlethread. As the looper is so withdrawn the shoulders 12,acting upon the loops of needlethread, draw them aside to the right of the needle-hole until the looper has been retracted for about one-third its distance, when the loops of needle thread slip from the said shoulders and start forward toward the point of the looper, the looper also continuing to be retracted in the opposite direction. At this time the usefulness of the finger n becomes apparent, for thcloops of needle-thread which have slipped off from the shoulders 12 in their movement and while the needles a Z) are again descending pass up to and against the finger n, and the said loops are retained at the right-hand side of the finger and of the needle-hole MP, the loops lying over the point of the finger between it and the under side of the throat-plate, while the needles a b descend at the rear side of the looper and between it and the thread carried thereby. As soon as the points of the needles CL Z) get into the loop of looper-thread, as described, the point of the looper in its backward movement comes out of the two loops of needlethread yet held by it and resting against the finger n at the right-hand side, letting the two loops be taken up into the material during the further descent of the needles a b and before the looper is again moved forward in the direction of its length into the new loops of needle-thread formed below the material by the needles then down into substantially their lowest position.

I claim- 1. The combination, with two needles and a looper and a throat-plate, of a yoke-like defiector located below the throatplate and having spring-arms, the inner surfaces of said arms being beveled or inclined to place the needles side by side in order that the loops of thread carried by them may be cor rectly entered by the looper and the needles enter the slot between the arms, substantially as described.

2. In a needle-bar, its two needles to b, the looper having the shoulder 12, and the throatplate, combined with the fixed finger n, 0011- nected to the under side of the throat-plate and located at the side of the needle-hole toward which the loops of needle-thread are drawn by the receding looper, and lying partially across the path in which the said looper reciprocates, th esaid finger retaining the said loops of needle-thread discharged from the shoulder 12 and preventing said loops while yet engaged by the looper from slanting forward in the path of the descending needles, the further backward movement of thelooper causing it to release the loops to enable the stitch to be repeated, substantially as described.

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

LORENZ MUTHER.

Vitnesses:

WV. S. NORTH, C. MCNEIL.