US146466A

US146466A - Improvement in sewing-machines

Info

Publication number: US146466A
Authority: US
Publication date: 1874-01-13
Anticipated expiration: 1891-01-13

Description

`A. MOLT'Z.-

Sewing-Machines.

- UNITED STATES PATENT OFFICE..

ADAM MoLrz, oE NEW Yonn, N. Y.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 146,466, dated January 13, 18745 application filed December 16, 1873.

To all whom it may concern:

Be it known that I, ADAM MoLrz, of New York, in the county of New York and State of `New York, have invented certain new and useful Improvements in Sewing-Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the` accompanying drawings, and

to the letters of reference marked thereon, which form a part of this specication.

My present invention is intended as an improvem ent upon the Letters Patent Nos. 108,070

` and 118,631, granted to me, respectively, May

17,1870, and August 29,1871; and the nature of my invention consists in the construction of longitudinal vertical section taken through the line w w, Fig. 1. Fig. 5 is a side View of the shuttle, and Fig. 6 is a longitudinal section of the same.

A represents the bed-plate of the machine, with bearings B B on its under side for sustaining the rocker-shaft C, from which motion is communicated both to the shuttle-carrier and the feeding mechanism. D represents the shutt1ecarriage, which is pivoted at its lower end to the bearing B, almost directly below the rockershaft C, and is then curved to pass around the same, and its upper end formed to receive the shuttle. The shuttle rests upon a iiange, a, and its heel or rear end is held by an ear, b, while the point of the shuttle projects through a V-shaped notch in an ear, d, at the front end of the shuttle-bed. The shuttleearrier is actuated from the rocker-shaft C by an arm, E, in the same manner as described in the Patent No. 118,631, above referred to. The shuttle Gr is substantially of the form shown in Figs. 5 and 6, and provided with a pin, f, in the center of the bottom, upon which the bobbin revolves, the bobbin being held in check by a spring, e, pressing upon it. This spring is located immediately in rear of the pinf in the center of `the back, and held in place by a pivot, upon which it may be turned in removing andinserting the bobbinf` his a spring formed. like a hook and located immediately in front of the pin f, and employed to give tension to the thread. On the end of the rocker-shaft C is secured a cam, H, which operates a vertical slide, I, moving .up and down in suitable guides on the outer side of the bearing B. The slide I is, near its upper end, on the outer side, provided with a flange or elongated projection, which passes through a horizontal slot in the feed-bar J, and hence said feed-bar is moved up and down by the rocking or backward-and-forward movement of the cam H.

The feed-bar J is moved backward and forward by the following means: On the hub of the cam H is a bevel-headed pin or screw, m, which operates against the lower end of apivoted lever, K, to turn the same on its pivot, when the feed-bar has been raised by the cam H. The upper end of the leverK is forked or slotted, and lits over a pin, n, in the feed-bar J, so that said feed-bar will, by the movement of the lever K, be moved forward to feed the goods. As soon as the feed-bar is moved downward and the pin m clears the lower end of the lever K, a spring, p, attached to the upper end of said lever, throws the feed-bar back again in its former position, thus forming the usual four-motin feed. The extent of the forwardand-backward movement of the feed-bar is .regulated by means of a lever, L, the upper end of which is slotted or provided with a slotted plate, t, which is placed over a pin, s, in the feed-bar. y By setting this lever backward or forward, the length of the stitch is regulated, as the feed-bar can only move back till the pin s strikes the end of the slot in the plate t.

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

1. The cam H, vertical slide I, with projec- A tion 17, in combination with the slotted feed-bar J, pins m and n, spring p, and lever K, all oon- In testimony that I claim the foregoing as struoted and arranged for operation as and for my own I afx my signature in presence of two the pulpolse speoefl 1 tte l 1 t t a d .n Witnesses.

2.leever W1 soy( ae n 1 s, n combination7 with cam H,ps1ide I havpng ADAM MOLTZ projection i, slotted feed-bar J, pins m and fn, Wvitnossos: lever K, and spring p, substantially' as and for R. WETZLICH, the purpose herein set forth. A. KRATZ.