US42976A - Improvement in sewing-machines - Google Patents

Description

E.V L. WALES.

Sewing Machine.

No. 42,976. Patented May 31, 1864.

1266865, Inc/sniff,

UNITED STATES PATENT OEErcE.

E. L. WALES, OF EAST RANDOLPH, MASSACHUSETTS.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 42,976, dated May 31, 1864.

To all whom it may concern:

Be it. known that I, E. L. fl/MES, of East Randolph, in the county of Norfolk and State of Massachusetts, have invented a new and useful Seam-Trimmer; and I do hereby declare that the following is a full, clear, and exact descrigtion of the construction and operation of the same, reference being had to the accompanying dra-wings, forming a part of this specitcation, in which- .Figure l is a top view of the trimmer at tached to the table of a sewing-machine;Fig. 2, a side view ot' the same, and Fig. 3 a side view ofthe knife detached.

Like parts are indicated by the same letters in all the drawings.

The nature of luy invention consists in arranging the edge of a trimming-knife in the throat-plate, or the plateon which the material to besewed rests, and through which the needle passes, ot' a sewing-machine the proper dis` tance from the awl or needle, and as nearly opposite the center ot' the throat as possible and not interfere with the needle-bar, so that however crooked the seam may be the trimmer will cut an equal distance from it, performing the operation simultaneously with the sewing, and doing the work much better as well as faster than it is possible to do it by any other means.

To enable others skilled in .the art to make and use my invention, I willV now proceed to describe its construction and operation.

A represents a portion of the table of any sewing-machine vthe stitch ot' which is adapted 'to sewing leather, and to which a clamp, rack and pinion, and a raised throat-plate may be applied.

B is the usual throat-plate, attached to the top of the table by means of screws.

fis the throat, through vwhich the needleor awl passes up and down.

knife coming` nearly up to the line t/ y, which passes through the center of the throat and needle. As the knife wears the slotsfi i allow it to be set forward.

Gr G are the two parts of a clamp between which the boot-leg or other article of leather to he sewed and trimmed is placed and securely held by screws passing from the upper halfinto thelower. This clamp may be straightedged, as shown iu Fig. l, or crooked, so as to correspond to any pattern or curve desired. The lower half ofthe clamp is provided with a rack, as represented hy the dotted lines in Fig. l, which engages with the pinion H, to which the proper motion inthe direction of the arrow is communicated by the machine in any obvious manner. Thus a boot-leg or other piece of leather, (represented in Fig. l by the dotted lilies 00,) tast in the clamp, will be fed along in the direction ot' the arrow, and as fast as the seam s is sewed it will obviously be trilnmed by the knife O, and as the edge of said knife is opposite the center of the throat fthe cut will always be at au equal distance from the seam, whether the latter be straight or crooked, whereas it the edge of the knife were located either hack or froit ofthe center of the throat a crooked seam could not he -evenly trimmed with it-i. e., the cut at all points would not be eqnidistant. from the stitch.

My device is very simple and inexpensive, and not only does the work much better than it can be done by hand, but also milch more rapidlyin short., as tast as the seam is sewed.

Having thus described the construction and operation of my improvement, what l claim as new, and desire to secure by Letters Patent, 1s-

So attaching a trimming-knife to the throatplate ot' a sewing-machine that the edge of the knife may be opposite or nearly opposite the center ot' the throat, substantially as set forth, and for the purpose described.

t E. L. WALES.

Witnesses N. AMES, G. W. CHUTE, J r.

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