US112308A - Improvement in sewing-machines - Google Patents

Description

UNITED f STATES Pnfrrnvr OFFICE.

- WILLIAM G. WINTERS, OF ROCHESTER, NEW YORK.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent N0. 112,308, dated February 28, 1871.

i roe and State of New York, have invented a certainnew anduseful Improvement in Sewing-Machines, of which the following is a specification Nature ofthe Invention.

This invention is an improvement upon the machine patented. to A.B.'Wilson, August 12, 1851, and known as the Wheeler Sr Wilson machine,77 and also upon the machine patented by Geo. B. Sloat, September 7,1858, known as the Improved Elliptic machine,7 and is applicable` to rotary hook and bobbin machines only.

The novelty consists in the peculiar form and construction of the cloth-plate and feed-y bar, as hereafter described, whereby the thread is drawn up perfectly at each stitch in turning curves or corners as. well as in` straight work, and the clothV is held firmly., down before and beyond the needle during the operation of sewing, to prevent its being drawn down in the needle-eye in the cloth-plate, or holding and pulling the work as it comes fromr ythe machine while being stitched, to prevent it from puckering and breaking the thread.

General Description.

In the' drawing, Figure lis a sectional elevation, showing` the cloth-plate, feedbar, and cloth-presser, with the usual underlying parts. Figs. 2, 3, 4, 5, 6, and 7 represent my improved forms of presser, (shown inverted,) cloth-plate, and feed-bar; Figs. 8, 9,10, 11, and 12, views of the old forms of cloth-plate, feed-bar, and presser; Fig. 13, a diagram` illustrating the action of drawing the stitch.

The operating parts of `the machine are of the usual form, with the exception of the clothplate A, feed-bar B, and presser G.

The cloth-plate A, instead of having lthe ordinary eye a for the passage of the needle,

, which is elongated, as shown in Figs. 9 and 11,'is provided with auneedle-eye, al, having two right-angled slots, a2 a2, Figs. 3 and 5, opening from it, for the purpose of allowing the thread free and unobstructed action dur ing the formation and drawing of the stitches,

in whatever direction the cloth may be turned or fed.

It' desired, the slot al may open into slot b2, as in Fig. 7. Also, instead of having simply two narrow elongated slots, b b, Figs. 9 and 11, it is provided with three slots or openings, bl b1 b2, Figs. 3 and 5, the latter being situated forward and widened beyond the needle-eye al, in order to receive the increased bearingsurface of the feed-bar resting therein, presently to be. described.

The feed-barB is of the same shape, and is operated in the same manner, as the old form of bar, (shown in Fig. 10,) with the exception that the feed-point d, instead of having simply the ordinary bearing-surfaces e e, Fig. 10, which come just under and in the rear of the needle, has two bearing-surfaces, cl c?, the latter extending forward and beyond the needle an extra distance, and being widened, as shown at f, which enters the slot b2 before referred to. It also has a thread-bar, g, on one side, opposite the needle-thread, for the purpose of preventing the thread from being drawn over the corner of the feed-point e, and thereby causing an uneven tension and breaking of the upper thread while the stitch is being taken or drawn up.

This construction leaves a large open passage for the working of the thread, which is necessary in my invention, and yet it serves as a perfect guard to prevent the catching of the thread, as before described. In this respect it differs essentially from a feed-bar having simply a long narrow slot to allow the needle to pass through without respect to the drawing up of the thread.

The presser Gis operated in the usual manner, and is of the ordinary form, Fig. 8, ex-V and in front and rear of the needle; that lthecloth is held before and beyond the needle

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