US249318A - Trimming attachment for sewing-machines - Google Patents

Description

(No Model.)

W. DIEBEL. TRIMMING ATTACHMENT FOR $EWING MACHINES. No. 249,318.

Patented Nov. 8,, 18 81.

UNITED STATES PATENT OFFICE.

WILLIAM DIEBEL, OF PHILADELPHIA, ASSIGNOR OF ONE-HALF TO OONYERS BUTTON, OF GERMANTOWN, PENNSYLVANIA.

TRllVlMlNG ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 249,318, dated November 8, 1881.- Application filed June 28, 1881. (No mo del.)

To all whom it may concern Be it known that 1, WILLIAM DIEBEL, of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Trimming Attachments for Sewing- Machines, of which the following is a specification, reference being had to the accompanying drawings. i

In thesedrawings, Figure 1 is a view in perspective of a portion of a sewing-machine provided with my improvement, and Figs. 2 and 3 are respectively side and end elevations of the trimming attachment separate from the machine.

My improvemenls belong to that class of trimmers in which a single chopper or unpivoted blade receives a vertical reciprocating motion in a plane parallel to the seam from the needle-arm of thc'sewing-machine; and it is the object of my invention to combine the working parts in the most advantageous manner. To that end I mount my blade upon a supplemental sliding rod or. bar reciprocating vertically in guides attached to the presser foot standardand parallel to both the needlebar and the presser-foot rod, and by means of a bell-crank lever and links I take the reciprocating motion from the needle-arm at a point comparatively near its fulcrum, thus obtaining all 'the necessary range of reciprocation with but little leverage against the driving mechanism.

In the drawings. A, Fig. 1, represents the' work-plate of the machine, having a slot parallel to the line of feed and adjacent to the necedge, as is indicated in Fig. 8.

B is the needle-arm of the machine, which in the-instance shown is of the Wilcox 8t Gibbs Mounted upon the same standard with the 5 presser-foot is the trimmer-carrier b b, in which the trimmer-bar a slides freelyin a vertical direction. At the lower end of the bar a, and at right angles thereto, is a lateral projection, c, which I term the trimmer-foot, and one end 0 of which extends between and slightly beyond the needle-bar and the presser-foot bar. The trimmer D is secured to this end of the trimmer-foot 0 in any suitable manner. The opposite end of the trimmer-foot c is provided with a guide, h, which fits snugly against the flat face of the trimmer-carrier b b and insures the parallelism of the trimmer-blade. The upper end of the trimmer-bar a is attached to a link,

G, which,in.turn, is connected with one arm of a bell-crank lever, F, pivoted to the standard 0 at p. The other arm of the lever F is connected at m with a link, E, which is pivoted at 0 to a projection, P, on the needle-arm.

The remaining parts of the sewing-machine .are only partially indicated in the drawings,

as their construction is well understood.

The operation of the attachment is as follows: The work having been properly adjust ed beneath the presser-foot, the sewing-ma- 7o chine is run, and the material as it is stitched is brought beneath the knife. The reciprocation of the needle-arm causes the knife to vibrate vertically in the slot, and thus trim the edge parallel to the seam.

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

' The combination, with the needle-arm, ot'the trimmer-bar and its guides and the bell-crank 8o lever and its links, substantially as and-for the purposes specified.

WM. DlEEBEL.

Witnesses CHARLES F. ZIEGLER, J. WALTER DOUGLASS.

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