US517376A - David brown - Google Patents

Description

(No Model.)

D. BROWN SEWING MAGHINE.

.No. 5113701 PatentdMar.Z7,1894.

UNITED S ATES- PATENT OFFICE.

DAVID BROWN, OF NEW HAVEN, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGNMENTS, TO J. WILLIS DOWNS, OF SAME PLACE.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 517,376, dated March 27, 1894.

Application'liled April 26, 1 93.

To all whom it may concern: Be it known that 1, DAVID BROWN, of New Haven, in the county of New Haven and State of Connecticut, have invented a new Improvement in Sewing-Machines; and I do hereby declare the following, when taken in connection with accompanyingdrawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, andwhich said drawings constitute part of this specification, and'represent, in

Figure 1, a view in side elevation of a sewing-machine constructed in accordance with my invention; Fig. 2, a front view thereof; Fig. 3, a partial plan view of the machineframe; Fig. 4 a sectional view of the machine on the line Ct--Z) of Fig. 1; Fig. 5, a sectional view of the machine on the line a d of the same figure; Fig. 6, a'detached perspective view of the feed-plate; Fig. 7, a detached plan view of the throat-plate.

My invention relates to an improvement in miniature sewing-machines, particularly designed for use by little girls in making dresses for dolls, the object being to produce at a low cost for manufacture, a simple, compact, du-' rable and convenient device, composed of few parts, not liable to derangement, manageable by any child, and adaptedto produce a very neat chain stitch.

With these ends in view, my invention consists in a sewing-machine having certain details of construction and combinations of parts as will be hereinafter described and pointed out in the claim.

The frame of my improved machine is composed of two parts A and A, secured together by rivets a a, and corresponding to each other except that the upper end of the part A, is constructed with two horizontal arms A and A located above each other in the same vertical plane and having the forward end of the part A abutted against their inner faces. The said members of the frame are cast, and may be readily assembled without finishing. By preference, they are constructed to form a seat a to receive a screw for fastening the machine to a table. A horizontal shaft B, mounted in the lower portion of the said frame, is provided at its inner end with a small finger 0, located in a vertical plane, and

Serial No. 71,960. (N0 model.)

constructedat one end with a hook D, which may be of any well known construction for forming a chain or loop stitch. A feed-plate E, interposed between the said finger O, and the adjacent portion of the machine, has a central opening 6, receiving an eccentric F, mounted on the said end of the shaft, and adapted to impart the required movement to the feed, which is provided at its lower end with an elongated slot 6, receiving ahorizontal pin G, projecting from the machine frame, the upper end of the said plate is furnished with two serrated fingers e 6 havingaclearance space 6 between them, the said fingers being adapted to rise through corresponding parallel slots h it formed in the throat-plate H, which is secured by rivets h h, in a horizontal position to the lower portion of the machine frame. Under this construction, the fingers of the feed-plate move in an eccentric path as the hook revolves, rising into the said slots h h at the forward ends thereof, moving rearward through the same, and then sinking down through their rear ends and moving rearward to their forward ends, and so on. The opposite end of the shaft B, is furnished with a sheet-metal crank I, provided at its outer end with a wire handle-arm J, carrying a handle J. An operatin -link K, applied to the bent inner end of the said handle-arm J, is loosely attached at its upper end to the outer end of the horizontal operating lever L, which is hung on the upper of the two rivets or, employed to hold the two members of the machine frame together, a portion of this lever playing up and down in a vertical slot formed in the machine frame by making complementary recesses (JP-a in the upper portions of the parts AA' thereof, as seen in Fig. 3. The inner end of this lever is rounded and inserted into a vertical slot M, formed in the needle-bar M, which has bearing in plates A A formed integral with the head A of the machine frame, the lower end of the said bar, which is formed of a wire rod, being constructed with a socket m to receive the needle N, and provided with a set-screw m to hold the needle in place. The throat-plate H, before mentioned, is furnished with a slot k located between its slots h h, to permit the needle to pass through the plate for co-operation with the hook D, the needle also passing through the clearance slot e of the feed-plate E. The said plates A A also afford a bearing for the Presser-bar O,which is alsoformed from a wire rod, and shaped at its lower end to form a bifurcated presser-foot O of ordinary shape. A gudgeon 0, consisting of a wire, is applied to the presser-bar in position to enter a notch 0 formed to receive it in the arm A whereby the bar is prevented from rotating. A coiled spring 0 encircling the said bar and interposed between the said gudgeon and the arm A exerts a constant effort to force the presser-foot 0' toward the throat-plate H. When it is desired to retire the presser-foot, or move it out of the way so as to expose the fingers e e of the feed-plate, or for any other purpose, it is lifted against the force of its spring 0 until its gudgeon 0 has been cleared from the slot 0' before mentioned, after which the bar may be rotated, being then supported in an elevated position by engagement of the lower end of its gudgeon with the upper face of the arm A Thelower end of the presser-bar is provided with a finger-guard P, made of wire, and designed to prevent the fingers of the operator from being caught under the needle, the said guard being formed with a straight end 19, which enters a horizontal opening 0 formed to receive it in the presser-bar at a point therein above the presser-foot, whereby the guard is permitted to swing in a vertical plane. Normally this guard inclines from its pivotal point forward and rests at its extreme forward end upon the upper face of the forward end of the presser-foot. A guard, constructed and arranged as described, is very effective as a guard, and does not obscure the needle nor prevent ready access to the same.

A threaded post Q vertically arranged upon the machine-frame in the usual position, is provided for carrying the spool R, the opposite ends of which are entered by cones S S, of which the lower cone rests upon a small spiral spring T, encircling the lower end .of the post. A thumb-nut U, mounted upon the upper end of the post, and engaging with the upper cone S, provides for regulating the tension of the thread which passes from the spool through an eye m formed to receive it in the upper end of the needle-bar. By turning the thumb-nut U, the tension of the thread may be very nicely regulated.

My improved machine, as will be seen from the foregoing, is of very simple and compact construction, and being composed of few and simple parts, is not liable to derangement.

Iwould have it understood that I do not limit myself to the exact construction herein shown and described, but hold myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of my invention.

I am aware that it is old to make a sewingmachine in sections which are riveted together, and I do not therefore claim that construction broadly.

Having fully described my invention, What I claim as new, and desire to secure by Letters Patent, is-- In a sewing machine, the combination with a frame composed of two substantially complementary vertical sections, rigidly secured together, one of the said sections having two horizontal arms, located in the same vertical plane and constructed to form bearings for the needle-bar and the presser-bar of the machine, an operating lever pivoted in the upper portion of the frame in a space formed between its two sections, on one of the pivots which hold the same together, and playing at its forward end through a slot formed in the said sections, and adapted to engage with the needle-bar; a horizontal drivingshaft journaled in the lower portion of the frame, connection between the rear ends of the said lever and shaft, and means for rotating the latter, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

DAVID BROWN. 4 Witnesses:

GEO. D. SEYMOUR, FRED. C. EARLE.

Images