US184824A - Improvement in sewing-machine take-ups - Google Patents

Description

A. BESCHER.

SEWING-MACHINE TAKE-UPS. No. 184,824. Patenqed Nov.28.1876.

1 I WGAW U a; 3 I

UNITED ST TES PATE T OFF CE.

ADAM BooHEa'oF NEW YORK, N. Y.

IMPROVEMENT IN SEWIN G-MACHINE TAKE-UPS.

Specification forming part of Letters Patent N 0. 184.824, dated November 28, 1876; application filed October 24, 1876.

To all whom it may concern.-

Be it known that I, ADAM BtiQHER, of the city, county, and State of New York, have invented a new and useful Improvement in Sewing-Machine Take-Up, which improvement is fully set forth in the following specification, reference being had to the accompanying drawing, in which- Figure 1 represents a rear view when the needle-slide is down. Fig. 2 is a similar view when the needle-slide is up. Fig. 3 is a faceand toe being placed in such relation to each other that the needle-slide can rise a short distance without imparting motion to the takeup lever, thus allowing the shuttle to pass clear through the loop of the needle-thread before the take-up lever begins to draw up the needle-thread. By this arrangement the-danger of breaking the needle-thread is avoided. Furthermore, as soon as the tappet begins to act on the toe a positive upward motion is imparted to the take-up lever, and the thread is drawn up with a speed which exceeds that of the needle-slide during the first half of the upward stroke of said take-up lever, while during the second half of the upward stroke the speed with which the needle-thread is gradually reduced until the stitch is drawn tight, and the take-up lever remains station'- ary while the needle-slide completes the last portion of its upward stroke. By this arrangement the stitch is drawn tight without danger of breaking the needle-thread or of allowing the formation of loose stitches. The eye of the take-up lever is formed by bending the saidlever up and then down, so that its end is situated beneath the body of the lever, and thereby all danger that the thread shall become disengaged from said eye is avoided.

In the drawing, the letter A designates the face-place of the needle-arm or goose-neck of a sewing-machine. In the inner surface of the face-plate are formed guide-grooves for the needleslide B, andalso for the presserslide; but in the drawing I have only shown the needle-slide, since my invention has no connection whatever with. the 'presser-slide.

Through the upper portion of said face-plate shaft (1 is secured the take-up lever O, which,

when the toe b is in the position shown in Fig. l, occupies the position'shown in full lines in Fig. 3; but if the toe b is brought in the position shown in Fig. 2, the take-up lever assumes the position shown in dotted lines'in Fig. 3.

The eye 01 of the take-up lever is formed by bending the same up and then down, (see Figs. 4 and 5,) so that its end extends beneath the body of the lever,- while the eye itself is raised above the surface of said lever, and thereby the'thread is prevented from becoming disengaged accidentally, and it can readily be introduced by passing it close to the under surface of the lever.

On the needle-slide B is secured a tappet, c,

- which can be adjusted up and down by a slotted plate, f. This tappet is so situated that the same, when the needle-slide is ,clear down,

occupies a position at some distance beneath the toe I). (See Fig. l.) The needle-slide, therefore, is free to move up a certain distance before the take-up lever begins to act. The object of this arrangement is to allow the shuttle to pass clear through the loop of the needle-thread before the latter is subjected to any strain by the take-up lever, and I am enabled to sew with very fine thread without danger of breaking the same by the action of the take-up lever. As soon as the tappet e strikes the toe b a positive motion is imparted to the same in the direction of the arrow marked near it in Fig. 3, and, since the take--' up lever is of greater length than the toe, the upward motion of the eye of said take-up lever during the first half of its stroke is quicker than that of the needle-slide, and the slack thread. is taken up with the requisite rapidity.

As the take-up lever approaches the upper end of its stroke the upward motion of the eye becomes very slow but powerful, so that the stitch is drawn perfectly tight without subjecting the thread to an undue strain, and

during the last portion of the upward stroke of the needle-slide the take-up lever remains stationary. This object is efl'ected by the pe culiar shape of the toe, (see Fig. 2,) which also permits the needle-slide to descend until the -point of the needle has entered the fabric to be sewed, before the take-up -lever is permitted to move down. 1 a

It must be also remarked that the eye of the take-up lever is situated directly over the needle'slide, so that the thread can be carried from said eye to the eye of the needle without an intermediate guide.

By this arrangement, the injury done to the thread as the same is drawn through the intermediate guide by the alternate action of the take-up lever and the needle is avoided.

shaft, the needle-bar B What I claim as new, and desire to secure by Letters Patent, is-- In a take-up mechanism for sewing-ma chines, the combination of a shaft, on, extending through the upper part of the face-plate A, the toe b,rarranged on the inner end of the shaft, the spring 0 for throwingdown the toe,

the take up lever O on the outer end of the in the faceplate, and the adjustable tappet e on the needle-bar, the whole being constructed for operation substantially as and for the object specified, whereby the needlebar can move upward a a certain distance beforeoperating the take-up lever, as set forth. a

In testimony that I claim .the foregoing I have hereunto set my hand and seal this 14th day of October, 1876.

- AD. BOOHER. [LS-1 Witnessesz W. HAUFF, E. F. KASTENHUBER.

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