US249648A - Machine - Google Patents

Description

(No Model.) 3 Sheets-Sheet 1.

T. A. MAGAULAY.

SEWING MACHINE. No. 249,648. Patented Nov. 15,1881.

WITNESSES Z LNVENTOR ATTORNEY.

8 Sheets-Sheet 2.

(No Model.)

T. A. MAGAULAY.

SEWING MACHINE.

Patented Nov. 15,1881.

INVBNTOR %ML WW ATTORNEY.

(No Model.)

WITNESSES a Sheets--Sheet T. A.MAGAULAY.

SEWING MACHINE.

Patented Nov. 15,1881.

IN VBNTOR W4 h w ATTORNEY NITED STATES PATENT FFICE.

THOMAS A. MAGAULAY, OF NEW YORK, N. Y.

SEWING-MACHINE.

SPECIFICATION forming part; of Letters Patent No. 249,648, dated November 15, 1881.

Application filed September 8, 1881. (No model.)

To all whom at may concern:

Be it known that I THOMAS A. lVIAOAULAY, of the city, county, and State of New York, have invented certain new and useful Improvements in Sewing-Machines, of which the following, with the accompanying drawings, is a specification.

Similar letters refer to like parts.

My invention relates to the thread-controlling device in connection with the devices for conveying motion to the umler-thread-operating mechanism.

In the drawings, Figure 1 is a rear side elevation, with the bed-plate in section, of a sewing-machine embodying my invention. Fig. 2 is a crosssection of the same through line 00 w ofFig. 1. Fig. 3 is afrontelevation ot'thehcad. Fig. 4 is a top View.

A is the bed-plate. B is the arm. 0 is the face-plate. D is the main driving-shalt; 1),

drivingwheel. E is a vertical shaft. F is a spiral screw-gear on the main shaft. G is a similar one on the vertical shaft. H is a revolving take-up wheel. I is a crank. K is a pitman. L is a shuttle-driver. M is a feedlever. N is a feed-cam. 0 is a feed-spring. n is a feed-dog. P is a tension-wheel. p is atensiou-spring. qisaregulating-nut. Ris the needle-bar. S is the presser-foot bar. T is a crank-disk. W is a slotted cross-head secured to the needle-bar. a b 0 are threadguides. d and care connecting-pins. fis a take'up spring.

Motion being given to the main drivingshaft D, the needle-barR is reciprocated in the usual way by a crank-pin in the disk T working in a slotted cross-head, W, secured to the said needle-bar.

The spiral screw-gear F is fixed to the main shaft D, and meshes into another spiral screwgear, G, on the vertical shaft E, and gives to said shaft E a rotary motion.

On an extension of the vertical shaft E is secured a take-up wheel, H, by the rotation of which the thread is controlled.

The crank I is fixed to the vertical shaft E. Its rotary motion reciprooates the shuttle-carrier L in the usual way.

The feed-dog a receives its up and down, forward and back motions in the ordinary Way by the cam N, lever M, and spring 0, the length of stitch being regulated by a stop-screw, as in similarly-constructed sewingmachines.

The tension is applied to the needle-thread by the tension-wheel P, springp, and regulating-nut q.

I have applied my invention to a shuttle sewing machine of otherwise ordinary construction; but it is applicable to a rotary hook, a rotary shuttle, or-oscillating lever carrying a shuttle, as may be desirable.

A shaft may be mounted in hearings on the under side o'f thebed-plate, carrying a rotary hook or a rotary shuttle, and connected to the vertical shaft E by spiral or other gears; or 65 an oscillating shuttle mechanism, such as de scribed in the patent granted to L. Miller and P. Diehl, October 8, 1878, may be used.

The take-up wheel used by me may be of other construction than that shown. Such a take-up wheel may be used as that described by patent to O. H. Willcox and J. E. A. Gibbs, dated April 12, 1881.

I do not broadly claim the screw-gears.

I claim-- 1. The combination of the driving-shaft D, having the spiral gears I with the shaft E, having the spiral gear G, and take-up wheel H, substantially as described.

2. The combination of the main shaft D, having the spiral gear F, with the shaft E, having the spiral gear Gr, take-up wheel H, crank I, pitman K, and shuttle-carrier L, or their equivalents, substantially as described.

In testimony whereof I aflfix my signature in 85 presence of two witnesses.

THOS. A. MAOAULAY.

Witnesses J. S. BROWN, AUG. A. NIoHoLsoN.

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