US253486A - James f - Google Patents

Description

: UNITED STATES PATENT OFFICE.

JAMES F. SNEDIKER, OFfPHILADELPHIA, PENNSYLVANIA, Assrenon TO JOHN 0. LOVE, or SAME PLACE.

SEWING-MACHINE ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 253,486, dated February 7 1882.

Application filed January 14, 1882. (No model.)

To all whom it may concern:

Be it known that I, JAMES F. SNEDIKER, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Sewing Machine Attachments, of which the following is a specification.

My invention consists of mechanism, fully described hereinafter, whereby a lateral reciprocating motion is imparted to the needle for making a zigzag stitch.

In the accompanying drawings, Figure l is a perspective view of my improved attachment; Figs. 2, 3, 4, and 5, side views, partly in section, showing the moving parts of the device in difl'erent positions; and Fig. 6, a front view of the device.

A represents the head or end of the stationary arm of an ordinary sewing-machine-a Singer machine, for instance-and B the needle-bar, the latter being reciprocated vertically by the usual mechanism, which it has not been deemed necessary to show or describe. To the lower end of the needle-bar is secured a block, I), grooved for the reception and lateral guidance of a sliding plate, a, in the under side of which are formed openings for the reception and retention of one or more needles, or.

On the back of the slide a are formed two lugs, c 0, into the space between which projects the lower end of one arm of a lever, F, the latter being pivoted to a bearing, (1, formed on or secured to the block D.

To the front of the head A is secured a plate, J, having a lug, to which is pivoted a lever, e, having three arms, 2', i, and i the arms 2" and i being situated in respect to each other substantially as shown. The arm 2' is wedgeshaped, and the arms 2" and i have inclined upper sides, so that the top of the lever 6 presents t-wo inclined planes, arranged at an angle in respect to each other, and upon these planes actsa spring-stud, m, adapted to slide in a tubular projection on the plate J.

When the several parts are in the position shown in Fig. 2 the needle-bar B has just commenced to rise. As the said bar rises the upper end of the arm b of the lever F strikes the inclined face a of the arm i of the lever e, and is thereby moved inward, the lower end of the lever F thus imparting a lateral movement in a reverse direction to the needle-carrying slide a. This movement continues until the upper end of the lever F strikes the under side of the arm i? of the lever c, as shown in Fig. 3. The upward movement of the needle-bar still continuing, the result will be the turning of the lever c in the direction of the arrow until it assumes the position shown in Fig. 4-that is to say, with the apex of its wedge-like upper surface slightly beyond the center of the spring-stud m. The needle-bar now descends, and as soon as the upper end of the lever F has cleared the lower end of the arm a of the lever c the action of the springstud m on the upper end of said lever causes it to assume the position shown in Fig. 5, so that on the next upward movement of the needie-bar the outer inclined surface, a, of the arm 0 will act on the upper end of the leverF and a lateral movement in a direction contrary to that above described will beimparted to the needle-carrying slide a, while the reversal of the posit-ion of the lever 0 will be effected by the action of the upper end of the lever F upon the arm 5 of the said lever c.

The above-described device is vsimple and inexpensive and can be readily applied to an ordinary machine without necessitating material change of the latter.

The lever 6 might be acted on by different forms of springs, and the slide a might have a rigid upwardly-projecting arm, upon which the arm 6 of the lever e might act to reciprocate the slide, and by which the arms 15 and i of the lever might be acted upon in order to shift the position of each lever.

I wish it to be understood that I do not claim in this application a sewing-machine attachment in which a pivoted spring-lever having three arms, i, t", and P, as described, is combined with a needle-carrying slide, (I, having an arm or lever, F, for acting on and being acted on by the lever e, as set forth, as this specific combination of parts is claimed in a separate application for a patent; but

I claim as my invention-.-

1. In a sewing-machine attachment, the com- In testimony whereof I have signed my name 10 bination of a. retaining-spring, pivoted tapp'et to this specification in the presence of two sub- 01' lever, needle-carrying bar or slide a, block scribing witnesses. D, arm or lever F, and devices for operating 5 said tappet or lever. J AMES F. SNEDIKER.

2. The combination of the needle-bar and its block D, having a slide, a, and lever F, \Vitnesses: with the plate J, carrying a pivoted spr'ing-le- HARRY DRURY, ver, 0, with three arms,i M as specified. HARRY SMITH.

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