US121046A - Improvement in hemmers for sewing-machines - Google Patents

Description

' HENRY A. LIS; I Improvement Hemmer fbf Sewi-hg Ma chinesf Nd.'1'21',.046,* F2 25 v Patented Nov. 21,1871.

HENRY A. ELLIS, OF ALBANY, N. Y., ASSIGNOR TO HIMSELF AND GEORGE S. WEAVER, OF SAME PLACE.

IMPROVEMENT IN HEMMERS FO R SEWING-MACHINES.

Specification forming part of Letters Patent No. 121,046, dated November 21, 1871.

To all whom it may concern:

Be it known that I, HENRY A. Films, of Albany, in the county of Albany and State of New York, have invented a new and Improved Hemming Device for Sewing-Machines and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing making part of this specification, in which Figure 1 is a perspective view of the improved hemmer. Fig. 2 is a top view of the same. Fig. 3 is a front view of the same. Fig. 4 is a bottom view of the spring-tongue, the scroll, and holder for the pressure-bar.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to improvements on the hemming attachment for sewing-machines for which applicationfor Letters Patent was made by me on the 12th day of April, 1870. My invention has for its object the guiding of the material up to the needle in a more perfect manner than hitherto, so that the hems shall be of uniform width throughout.

The following description of my invention will enable others skilled in the art to understand it.

A B represent a narrow thin strip of metal bent so that the portion A lies over and parallel to the base portion B, leaving a narrow space between them for receiving a scroll-turning device, D. The upper portion A is slotted longitudinally at a, and its free end is hooked under as at b, so as to receive the free end of the base portion, as shown in Figs. 1 and 3. The slot a receives through it a screw, g, which secures plate A to the holder and allows the plates A B B to be adjusted, according to certain gauge-marks which are engraved on the plate A, for different widths of hems. The base-plate B terminates at its free end in a long guide, B, the edge 8 of which is oblique to the line of plate B, for a purpose hereinafter explained. This guide B, together with the end of plate B, on which it is formed, are turned up, as indicated in Fig. 3, for the purpose of keeping the folded material well up in the hook b and preventing any liability of its catching or dragging between the 'endof plate B and the end of hook b. The holder 0 has a needle-hole, 6, through it, and is adapted for being secured to the lower end of the pressure-bar of, a sewingmachine. This holder, which is secured to slotted-plate A by means of screw g, as above described, is constructed with a raised guide, s, which is received into slot a, and prevents the plates A B B, from twisting when secured to the pressure-bar of a sewing-machine. Beneath that portion of the holder 0 which lies under the slotted plate A, and permanently secured to the holder, is a scrollshaped turner, l),which is inverted so as to turn the edge of the goods under while being fed up to the needle. This scroll terminates forward in an inclined supporting and conducting lip, g, which insures the proper passage of the material to the needle. Alittle to one side of this turner D a pressure-spring is secured permanently to the bottom of the holder 0. This spring extends backward and downward so as to press upon the goods directly beneath the edge thereof. It is also made with an oblique edge, 00, so as to afford more room between itself and the bar B and still have a broad bearing-surface and bear directly in line with the feed. The raw edges of goods which are torn are more or less stretched, and unless some provision is made for stretching in a like manner that, portion of the goods to which these edges are stitched the hems will be uneven and great difliculty will be experienced in guiding the goods up to the needle. The pressurespring E has oblique ridges formed on its impinging surfaces which are directed away from the guide B, and which operate to stretch the goods at that part where the edge of the hem is stitched to it. spring E would not operate as stated without the aid of a guide, B, which holds the hem by its folded edge while the said ridges stretch the lower portion of the hem. This pressurespring also serves as a gauge in sewing very narrow hems, when the guide B is not brought into play. The distance from the free end of the base-plate B to the turned edge of the hem indicates the width of the hem; but the oblique edge 8 falls short of this; consequently when the material is held up to said edge and fed along the hem will not only be of a uniform width, but it'will be drawn smooth. With this oblique guiding-edge very little attention or manipulation of the ma- The ridges on the pressure-- terial is required to keep the hem of uniform width and smoothness.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, 1s

1. The guide B, constructed with an oblique edge, 8, extending beyond the rear of and in combination with the hook I; of the folder, substantially as described.

2. The combination, with the above, of the pressurestretching spring E, when constructed and arranged as described to bear directly in

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