US76720A

US76720A - Improvement in hemmer

Info

Publication number: US76720A
Authority: US
Publication date: 1868-04-14
Anticipated expiration: 1885-04-14

Description

E. P. DAVIS.

Hemmer.

Patented April 14, 1868..

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EDWARD P. DAVIS, 'OF NORTH ATTLEBORO, MASSACHUSETTS.

Letters Patent No. 76,720, dated Apr-i114, 1868.

IMPROVEMBN T IN HEMMER.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, EDWARD P. DAVIS, of North Attleboro, in the county of Bristol, and State of Massachusetts, have invented a new and useful Improvement in Hemmer-s for sewing-machines; and I do hereby declare that the following specification, taken in connection with the drawings of the same, is a full, clear, and exact description thereof.

' Figure 1 is a view in perspective.

Figures 2 and 3 are views of an attachment, shown at A in fig. 1, for turning a deeper hem than, without it, would be turned by the hemmer proper. I

Ilemmers for sewing-machines have heretofore been so constructed that the face side of the stitch made by the machine is made to show upon the same side of the cloth on which the hem is turned. For machines which do not form the stitch alike, or with equal fairness on both sides of the seam, it is very desirable to have a hemmer which will enable the face side of the stitch to show upon that side of the garment which is worn outward.

In the accompanying drawings, the hemmer, fig. 1, is shown as attached to an arm, B, and by means of which it is kept in proper relation to the needle and feeding-mechanism of a sewing-machine; the arm being clamped to the table of the machine by a thumb serew, for the convenience of the application of which, a slot, 11, is cut in the arm.

"The devices to turn over the e'dge of the cloth as it is fed along consist of two plates or strips of sheet metal, I) and 0. These strips are secured to a common foot-piece, d, and, starting parallel to each other, rise in-a direction nearly perpendicular to the plane of the table, to a heightvarying from one-eighth to seven-eighths of an inch, according to the depth of hem which the apparatus is designed to turn. This part forms a leg, e, for the support of the hemmer at that end. The strips 6 and c'now turn at right angles, or nearly so, with their respective legs e, and, maintaining their parallelism, twist one-fourthof a turn in their entire length, which may be from one and a half to two and a half inches, according to the requirements of the case. Near the end,

the under strip 6 is widened, and made to overlap the upper strip, as shown at f, the contour of the edge of such overlapped portion being rounded,'as shown.

The. undermost one, 6, of the two strips of metal, containing the guiding-plates for the cloth, is not only secured to the foot-piece d, as stated, but is also supported by the arm B attached to the underside of such strip, while its front edge is parallel with and rests upon the table of the machine. The strip 0, forming the upper guide, having no other support than by its attachment to the'foot-piece d, is free'at its front end to spring, and can be adjusted so as to exert a yielding pressure uponthe cloth interposed between its upper surface and the under surface of the overlapping portionf.

Let it be supposed, now, that a-piecc of cloth to be hemmed is to be adjusted in the hemmerr It should be inserted from the upper side, between the two guiding-plates, b and c, and its edge turned over, so as to come between the nndersurface of the overlapping portion f and the upper surface of plate 0. This will obviously cause one laponly to be given to the cloth at the edge, as shown at Figure 4. To complete the turns for the hem, the article should be allowed to fold over the upper edge of plate a, and form a fold, as shown at Figure 5, and cover the lap first made, (fig. 4.) This arrangement will necessarily bring the face side of the article, or that side worn outward, uppermost the folded edge, making the hem, being underneath, and consequently the fair side of the stitch will show upon that side of the garment.

The hemmer above described is capable of turning horns of ditferent depths by a simple adjustment. Upon the upper surface of the strip or plate 0 are placed two keepers, g and 71. A light frame of wire, A, bent into form, substantially as shown, so as best to accommodate the movement of the cloth, is, held in place by the keepers, as seen at fig. 1. The article or garment to be hemmed, when this attachment is applied, folds over the edge-of this frame instead of over the edge of the plate a, as above-stated, and the depth of the hem, or the distance between the first and second of the two folds which make the hem, will he thereby increased. It is quite evident that a number of frames may be fitted to one hmmer, so as to turn hems of d i figr'ent depths by simply removing one frame and nbstituting another in its piace.

What I claimas my invention, and desire to secure'by Letters Patent, isr

The combination of the plates b and a, formed as showmand described, with the arm A, as and for the purtf h; poses se ort D P, DAVIS.

Witnesses:

WM. W. RIOKARD, J. M. Coscmovm.