US131324A - Improvement in sewing-machines - Google Patents

Description

KATE C. BARTON. Sewing-Machine.

No. 131,324. Patented sep.17,1a72.

M7/.4 2 mi M5 UNITED STATES.

PATENT TTTG,

KATE C. BARTON, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 131,324, dated September 147, 1872.

To all whom it may concern.'

Be it known that I, KATE C. BARTON, of the city and county of` Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Sewing-Machines adapted to sewing sails, awnings, &c.; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawing and letters of reference marked thereon.

My invention consists in an arrangement of two or more needles and other necessary sewing parts, with a device for folding or ini terlocking the edges of two pieces of fabric to be stitched in parallel lines, the whole operating to produce seamsof great strength.

Figure l shows a plan of this machine; Fig. 2, a side elevation; Fig. 3, a front elevation. All of the above figures are on a scale one and one-half inch per foot. Fig. 4, the creasing device, drawn of full size. Fig. 5 shows afull-sized section ofthe seam produced.

The same letters of reference apply to the same parts in the several figures.

A is the bed or cloth-supporting table of the machine, on which is fastened B, a guide or creaser formed of two hooks, B1 and B2, made larger at the front end, so as to facilitate the entrance of the pieces of cloth C and C1. The cloth, over which the creaser B passes, is bent into folds G2 and C3, which, interlocking, resemble, in cross section, the joint known by platemetal workers as a locked joint or double seam. D and D are needles, which simultaneously make two rows of stitches through the folded cloth as it passes out at the back of the creaser B.

The arrangement for stitching may be any of those now in use for producing-either a chain-stitch, by means of a looper under the table, or shuttles containing bobbins such as are used in lock-stitch sewing-machines may be employed. The particular arrangement of this part of the mechanism not forming an essential component of this invention, any of the known forms of stitching apparatus will comply with the requirements of this part of my invention.

W is a windlass for straining or stretching the edges of the twopieces of cloth G and O1 forming the seam attached to the ends thereof, the other ends being secured to a post, X, or other fixed object. l

The purpose of stretching the cloth in this operation is three fold: First, to relieve the operator and machine from the weight of the cloth 5 second, to avoid puckering of either piece of cloth from throwing undue strain on the tighter piece when the sail is in use; and, third, to prevent the sewing of stitches tighter than the cloth, and the consequent breaking thereof when the seam is subjected to longitudinal strain in use.

The machine is supported on wheels O, resting on rails R, on which it has a progressive movement in the intervals of time between the making of the stitches, imparted to it by a feed motion, consisting, as I have shown, of a ratchet-wheel, S, and pawl T, or by any of the feed-motions in common use in sewingmachines.

A cord or tape, U', is attached to the windlass, and, passing over a roller, V, through the creaser from back to front, has each end secured by pinning or basting to one of the front corners of the seam to be united. The rear corners are then secured to the postXby tapes Z, and the windlass W tightened up so as to stretch both the pieces G and C1 of the clot-h evenly at the edges forming the seam.

The needles D and D and shuttles M and M are supplied with thread, and the machine being putin motion passes the creaser B from the end toward the windlass W toward the post X over the edges C and C' of the cloth, and folds them, as shown. in the section in Fig. 5, in which shape they are lirmly stitched by the needles D and D', forming a substantial seam.

The form of this machine may be varied without changing its essential character, as, for instance, more needles can be used, and more than'two lines of stitching produced.

The cloth may be strained to a frame bearing the windlass, and the frame and cloth moved instead of the machine but I deem it preferable t0 move the machine, especially in reinem the case of large sails. All of these modii- 2. The Windlass W7 roller V, eordU, and cations, I believe, are included. in my invenpost X, in combination with a traveling sewtion. ing-machine guided upon rails, and operating I do not cla-in1,separately,V any of the instruas described.

mentalities I have described; but KATE C. BARTON.

What I do claim as my invention, and desire to secure as such by Letters Patent, is- Witnesses:

l. The combination of the duplex or multiple arrangement of needles and stitching1 de- S. LLOYD WIEGAND,

vices traveling on Ways with the guides B1 and THOMAS H. NEILSON.`

B2, as and for the purpose set forth.

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