US108020A - Improvement in sewing-machines - Google Patents

Description

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'rHoMnlsfJwHAltran; or ATLANTA, Gronau.;`

Letters Patent No. 108,020, dated' October 4, 1870.

, iMPRovEMEN-r IN SEWING-MACHINES.

To all whom. it 'may concern with a button-hole attachment, as will he hereinafter fully setforth. 1

In order to enable othersskilled in the art to `which my .invention appertains tomake and'use the same, I wlll now proceedto describe itsconstruction and operation, `referring to lthe annexed drawing, in

' which- Figure 1 is a front elevation of my sewing-machine; Figure 2 is a side view of the shuttle-arm, with. a

Vcircular needle attached;

Figure 3 is a view of the under side of the sewingmachine table; j y 4 Figure 4 is a side view'of the feed-bar. Figures 5 and S are. views of portions of the bars that operate the feed-bar.

Figures 6 vand `7 are plan Vviews of the needleplates.

VA represents the table bf a sewing-machine, on the under side of which, near one end, are two ears or projections B-B, forming `bearings for the drivingshaft O.

The shaft C is provided with a wheel, D, to be connected by a' belt, or iotherwise, with a treadle, which I have not deemedit necessary to represent in the drawing, as it may be constructed Ain any manner desired. l

The shaft C is -also provided with anV eccentric,'E, which has a wrist or crank-pin, a, inserted,in 'an ir regular slot in the lower end ofthe needle-arm G, for moving the same.

The needle arm Gr is pivoted tothe curved-standard H, on top of the table A,and carries the needle d, the standard H having the presser-foot I operated `by means of the spiral spring b.

The eccentricE is also provided with a strap, c, and connecting-rod J, that connects to and works the shuttle-lever and drivenK, which, being pivoted to and supported by means? of a bracket, L, gives the 4shuttlea vertical circular, motion in' its movement back and forth. 4

The feed-bar M,f.whiclr` is held outward from the 'needle and shuttle by means-of a. spring, f, and reguf lated by means of the sliding bar N, is operated by .means of the two sliding-'bars O andQ.

The har O is pivoted to the lower end of thencedle-arm G, and is, at' its front end'on the upper side, beveled, as shown ih iig. 8, so that, by the forward motion of said bar, the feed-barM will be raised up on the upper side of the table, for thepurpose of catching the Vcloth to 'carry it forward.

The bar O', which moves in" suitable guides, is slotted at its rear cndand connected with the bar O by means of a pin or Iholt passing through said slot into the bar O. l

The front end .of the bar 0' is bent, asshown -in fi 3. l

.gWhen the bar 0 moves forward, and has raised the feed-bar M, as above described, the bolt connecting it witli'the bar O strkes'the forward end of the slotin the same, carrying it forward, enabling its bent end to move the feed-bar inward.

As Vsoon as the sliding hars O and 0'l move backward again, the spring f will carry the feed-bar back as far as the regulating-bar N will allow.

The button-hole attachment consists of a circular needle,.h, vwith lever attached oreombiued in such a way, when screwed to its place on the machine, which is in the shuttle-1ace,an`d just in front of the needlehole, that while `the short end is a circular needle to be threaded through the eye-hole inthe point, the long end is a lever, andpasses through the head of a small belt, i, in the upper end of the shuttle-lever.

The bolt i revolves freely in the lever, so when the shuttle-lever moves back and forth it drives the circular needle.

Vhen the shuttle-lever moves forward, the point of the circular needle draws back past the upper needle fl. As it moves back, the circular point passes through the loop across the upper needle, around and above the edge of the cl th, and stands so until the point of the upper needle comes down and passes through` its loop. Then, it draws down and back, ready to again pass through the loop of the upper needle, below the cloth, thus making the button-hole stitch.

This attachment or circular needle is supplied with thread from a spool, fastened toa convenient place under the machine.

Fig. 6 shows the needle-plate used. when plain sewing is desired, and iig. 7, the plate used when'the button-hole stitch is desired. The only difference is that the latter plate has a grooved projection on its upper side, through which the circular needle passes.

When the button-hole stitch is desired, the shuttle must be removed, and the' needle-plates changed.

Having thus fully described my invention,

What I claim as new, and desire to secure by Let- 1. The arrangement, Vupon the' shaft 0, of -the driving-wheel D and eccentric E 4with wrist-pin a, In testimony that' I claim the foregoing, I have operating the needle-arm G, connecting-rod J,.piv hereunto set my band .this 15th-day of November, oted shuttlecnrrying-arm K, and bars O O', all con- 1869. structed and operating substantially as setz fort-h.

T. J. HARPER. 2. The combination of' the' shuttle-lever K, pv Witnesses: oted eye-bolt 0', and circular needle h, all substantially JNO. L. HOPKINS, as and for the purposes herein set forth; CHARLES K. MADDOX.

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