US666876A - Sewing-machine attachment for blindstitching and overseaming. - Google Patents

Description

, Patented Ian. 29, mm. C. SCHNEIDER. SEWING-MAGHINE ATTACHMENT FOR BILINDSTIT'CHING AND OVERSEAMING.

(Application filed. Dec. 13, 1898.)

(No Model.)

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NITED STATES PATENT Fries.

SEWING-MACHINE ATTACHMENT FOR BLiNDSTITCHING AND OVERSEAMING.

SPEGIFIGATION forming part of Letters Patent N 0. 666,876, dated January 29, 1901.

Application filed December 13, 1898. Serial No. 699,133. No model.)

T0 00% whom it may concern/.-

Be it known that I, CARL SCHNEIDER, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Sewing- Machine Attachment for Blindstitching and Overseaming, of which the following is a specification.

The object of this invention is to provide a new and improved sewing-machine attachment for overseaming and blindstitching, which attachment can be used on any sewing-machine and can be applied very easily and rapidly.

In the accompanying drawings, Figure 1 is a plan view of my improved overseatning and blindstitching attachment for sewing-machines. Fig. 2 is a side elevation of the same. Fig. 3 is a vertical transverse sectional view Fig. 4 is a similar view showing the parts in different positions.

Similar letters of reference indicate like parts in all the figures.

The presser-foot A projects laterally from a plate 13, mounted to slide transversely to the length of the presser-foot on the under side of a forked block 0, provided with a socket D for receiving the lower end of the presser-bar E, which is held in the socket by a binding-screw E. A headed screw F is mounted in a cross'pieoe on the forked piece 0 in such a manner that said screw can turn axially, but cannot move lengthwise. The screw F is screwed through a block G, located between the shanks or prongs of the forked piece 0 and extending up between said prongs from the sliding plate B. A screw G extends upward from said block G, and on the same a nut H is screwed, which rests upon a washer H on the upper edges of the prongs of the forked block 0. By turning the screw F the plate B can be shifted on the under side of the block 0 in relation to the needle a, and after having been shifted can be locked in place by means of the not H. Gage-marks a on the sides of the block 0 and plate 13 facilitate such adjustment. The plate B has aperturedwings I, through which two pins J extend upward from a base-plate K, which in use is to rest upon the sewingplate of the sewing-machine, and may, if desired, be secured after adjustment by means of a screw passed through a slot K in the plate K and screwed into the sewing-plate. It follows that when the plate B is adjusted .by means of the screw F the plate K is adjusted or shifted with it. A recess L is formed in the side edge of the plate K facing the presser-foot A and in the same a pusher M is mounted to slide horizontally and is provided in its outer end with a vertical slit M, through which the needle at can pass, as

shown in dotted lines in Fig. 3. The pusher M has an outwardly-extending lug, through which one end of a cam lever N passes, which is pivotally mounted on the top of plate K and is acted upon by a spring 0, (shown in dotted lines,) which presses the inner edge of said lever against a triangular cam-piece P, pivoted on the top of the plate K and made integral with a ratchet-wheel Q, having twice as many teeth as there are cam projections on the cam-piece P. A slide R, mounted to reciprocate on the top of the plate K, has a spring-pawl R, which can engage the teeth of the ratchet-wheel Q and rotate the latter step by step. The slide R is engaged by the lower end of an angle-lever S, pivoted at S on a standard T on the plate K and acted upon by a spring U. The opposite end of the angle-lever S has a lateral projection V, against which the needle-screw W on the reciprocating needle-bar W can strike on its upstroke. The presser-foot A has a recess b in its side edge facing the pusher M.

The fabric 9 is folded, for example, as shown in Figs. 3 and 4, and placed under the presserfoot A,wl1ich has been previously adj usted,so as to bring the edge of the base-plate K the proper distance from the needle. As the needle-bar W reciprocates up and down, the screw-head on the same strikes against the projection V on the lever S and swings it upward, whereby the slide R is moved in th direction of arrow X, Fig. 1, and the ratchetwheel R is turned the distance of one tooth by the pawl P. During the downstroke of the needle-bar the spring U throws the lever S back into the initial position,and so on. The ratchet-wheel Q is thus turned one tooth for every upstroke of the needle-bar, and for every two strokes the cam-piece P is turned one-third, or, in other Words, for each alternate upstroke of the needlebar the cam piece is brought in position to press the lever N, and consequently the pusher M, outward, and at the intervening upstrokes the lever N and with it the pusher M are forced back by the spring 0. Thus for one downstroke the pusher M is forced out and pushes the fabric 9 out of the \vayof the needle a, which passes through the slit M in the pusher. (See Fig. At the next downstroke of the needle pusher M is Withdrawn, as shown in Fig. 4, and the needle passes through the fabric, and so on. The fabric returns after it has been pushed aside under the action of the tension imparted to it by the presser-foot and cloth-feeder. The blind stitch is produced in the Well-known manner by doubling over a fabric so as to present a round doubled-over edge, through which the needle passes at each alternate stroke.

The advantage of a pusher Working in a straight line over one operating with a swinging motion will be obvious to any one inechanically inclined. A more solid construction is secured, and perfectly certain operation results, as practical use has demonstrated. Moreover, the pressure is exerted directly against the edge of the fabric, and the elasticity tending to bring it back under the needle is much better preserved than when the fabric is swept to one side by a swinging motion of the pusher.

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

1. In an overseaini'ng and blindstitching attachment for sewinganachines, the combination with a presser-toot having a recess in its inner edge, of a base-plate held on the presser-foot and having a vertical slot in the edge facing the presser-foot and extendinginwardly at right angles to said edge; a pusher having a vertical slit and reciprocating in said slot, a cam-lever reciprocating the pusher, said cam-lever being operated by a reciprocating slide mounted on the top of the baseplate and controlled by a spring-lever actuated by the needle-bar, substantially as described.

2. In an overseaming and blindstitching attachment for sewing-machines, the combination with a spring-lever contacting with the needle-bar and reciprocating a slide mounted in the top of the base-plate, of a cam-lever controlled by said slide and reciprocating a vertically-slitted pusher in a vertical slot opposit'e a recessed presser-foot, substantially as described.

3. In an overseatning and blindstitching attachment for sewing-machines, the combination of a slide reciprocated in the baseplate, a spring-pawl attached to said slide and operating a cam-lever, a slitted pusher reciprocating in a vertical slot in the base-plate by said cam-lever, and a recessed presscr-foot attached to the base-plate opposite the vertical slot, substantially as described.

Signed at New York, in the county of New York and State of New York, this 9th day or". December, A. D. 1898.

CARL SCHNEIDER.

Witnesses:

OSCAR F. GUNZ, LESTER L. DAVIS.

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