USRE613E - Improvement in sewing-machines - Google Patents

Description

S. C.` BLUDGETTL Sewing Machine.

Reissued Oct. 12` 1858,

' elevation of it.

. UNITED STATES PATENT OFFICE.

sHERBUnNE c. ELoDGE'rT, oEGEoRcEToWN, AssiGNon, BY MEsNE AssicN- MENTS, 'ro o. n'rorrEE, WM. o. Gnovnn, AND w. BAKER, or BosfroN,

' MASSACHUSETTS;

|MPRO`VEMENT- IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 10,354, dated December 20, 1853; 'Reissue No. 613, dated October l2, 1858.

To all whom it may concern: Be it known that I, SHERBURNE C. BLoD- GETT, of Georgetown, in the county of Essex and State of Massachusetts, have invented a new and useful machine or new and useful improvement in machinery for sewing cloth or such other material or articles to which the same may be applicable; and I do hereby declare that the same is fully described and represented in the following specication and accompanying drawings, letters, c figures, and references thereof.

Of the said drawings, Figure 1 represents a top view of my said machine. Fig. 2 is afront Fig. 3 is an end elevation of it. Fig. 4 is a horizontal section of it, taken just above the needles by which the stitches are produced. Fig. 5 is a diagram exhibiting on an enlarged scale the manner in which the two threads used are looped and interlocked by the two needles used in order to sew together two pieces of cloth..

In said Fig. 5, A and B may be supposed to represent two pieces vof cloth sewed together by two threads, a and b, which, in order to more clearly exhibit theirloops, are not drawn close i-nto the cloth. The two needles are shown at C and D. Each needle is made with a vertical hole or eye, e or f, made through it a short distance in the rear of its point. The thread c is passed upward through the eye of the needle C, while the thread b is passed downdle c, having thel thread a run through it, is

next passed between the lower side of the needle D and that part of the thread b which lies underneath the needle D, and directly between the eye f and the cloth, and far enough beyond the piece of cloth B to allow ofthe correct operation of the needle D when next passed 'through the cloth and between the thread a and the needle C. .All this being effected, the

needle D is next withdrawn from the cloth and forced through the loop of the other needle and the cloth. Next the needle C is operated as before described. The operation thus goes on, each needlev being alternatelyv withdrawn from the other and next passed through the loop of the other needle, or the same and the cloth, until the whole line of sewing or the seam is effected.

In Figs. 3 and 4, C and D denote the two f needles. The former or front needle, C, is attached to or projected backward from the front end of the bent bar E, a longitudinal and verticalsection of which and the `needle are represented in Fig. 6. n The said bent bar rests and is supported upon a bed-plate, F. `It is sustained thereupon by one or more suitable guides or clasps, G, which allow it to move back and forth in alongitudinal direction sufficiently to draw the needle into and through the cloth and out of it to the extent required. The said bar Eis j ointed to one end of a horizontal vibrating bar, H, which turns horizontally at its opposite endon a center or joint pin, I, which passes through the bar and is aflixed in the bed-plate, the joint or (connection, of the bars E and II being so made as to readily ad mit of a reciprocating longitudinal movement of the bar E in a straight line. A small stud, K, projects upward from the upper side of the bar H, and enters a cam-groove, L, made' around the exterior of a cylinder, M, arranged and fixed on a horizontal driving-shaft, N, whose journals are supported by bearings afiixed to two standards, O P, raised upon the bed-plate. vThe other needle, D, is also affixed into and projects from the front end of a horizontal bar, Q, arranged upon the bed-plate, as'seen in the drawings. The said bar Q is supported on the top surface of the bed-plate by two clamps, X Y, through which it plays, and is not only to have a reciprocating longi tudinal movement imparted to it, but should be allowed or 'caused to have such lateral movements as may be sufficient to permit it not only to move in one direction with and in the cloth when said cloth is moved, in order to produce a succession of stitches, but also, after it has been drawn outot1 the cloth, to move 2 cis in the opposite direction a distance suicient yto return it to its original positionor line of direction, in Awhich it should next enter and pass through-the cloth. The machinery which produces these movements is as follows:

R is a vibrator-y horizontal bar, which turns at one end upon a pin or center, s, projecting from the bed-plate. bar R is jointed to one end of a short arm or bar, T, whose other end is jointed to or turns horizontally upon a pin, U, projecting from the bar Q, as seen in the drawings. A stud, V, projects from the upper side of the bar R, and is caused to enter a cam-groove, W, made in and around the cylinder M. Each ofthe aforesaid two cam-grooves W and L shouldbe of such shape 'as may be required to produce the necessary longitudinal movements and intervals of rest of the needle attached to the needle-bar operated by said grooves. The front part of the bar Q passes through the clasp or staple X, the passage through which is to be made of a width in a direction crosswisegof :the bar sufiicient to allow of thelateral movements ofthe bar. The lateral motion of the said ba'`and its needle is produced by the movement of the cloth, or it may be effected by a spring-suitably applied. The return lateral movement of it iscaused by a projection, g, aiXed to a vibrating or pendulous frame, p, a rear view of which is seen in Fig. 7 which represents f a vertical section of the machine`, taken just in rear of the said frame, and through the stud K and transversely of the cam-cylinder,

' the said section being taken as if the spectator were looking toward the front part of the machine. The said frame is composed of two arms, k Z, united together and suspended on a joint-pin, t'. One of said arms extends down .f oneVY side ofthe cam-cylinder;` and the other on the other side of it.

There is a small stud or cam, u, inserted in and made to proj ectfrom the cam-cylinder in such a manner as to alternately come in contact with each arm k l of the frame during each revolution of the said cam-cylinder, and thereby produce a vibratory or pendulous movement of it. When the said cam n acts against the arm Z of the frame, it will so move the frame as to carry the projection g against the needle-bar Q, and move the same laterally to the extentrequired to carry the needle back into the line of direction in which it is next to pass through the cloth.

The cloth tovbe sewed is confined to a cloth bar or carriage, z, which is supported by and moves upon a horizontal bar, o', sustained in position above the bed-plate by two stand- -ards, p q. The said carriage should be so applied to its sustaining-bar as to admit of a horizontal movement thereon from one end of it toward the other end of it. 4The carriage may be made in anyrsuitablemanner, or it may be composed of ytwo clamp-plates, r s t,- conined` together by screws, or a hook, b, the upper edges of the cloth tov be sewed being placed or inserted and held between said The opposite end ofthe i plates, the cloth being suffered to hang down below the rest-bar.

A rack of teeth, t is made on the top of the carriage. r pawl, u, works, the said pawl beingmade to f Into this rack a drawing springproj ect from the frame hand to be moved by it in one direction over the `teeth of the raclg" "of the needle C, thence upward and through the eye of said needle. The other thread, b, is also shown as passing from a bobbin, t, thence to the upper side of the needle D, and downward through the eye of the same. The said bobbin should be so applied to the bedplate as to be capable of revolving and delivering lout the threads as fast as necessary, and in order to draw the threads or loops closely into `the cloth any mechanical contrivance suitable therefor may be employed. Fig. 8 denotes a side view of the needle C, and Fig. 9 a side view of the needle D, the same being shown on an enlarged scale. The former, it will be seen, is made with a small bend or depression, no., on its upper side and just in `the rear of its eye. The latter has a similar depression, y, in its lower side.`

The bend or depression in each needle is for the purpose of favoring the admission of the point ofthe other-needle between it .and the Y thread of it. When the needle secured to the bar Q is moved laterally, as I have described, in one direction by theV spring acting on its needle-bar, and in the opposite direction by the operation of the pendulous frame h, the needle, being'` in the cloth during the direct movement and out of it during the reverse movement, imparts successive` movements to the clothy in the direction in which it is to be moved to form the successive stitehes. The needle thus constitutes an instrument for feeding cloth through the machine, and its agency as such an instrument will depend upon the circumstances under which the machine may be used. If the work be heavy, so that a considerable force is required to move it, the use chanical contrivances for moving either of the needles orV the cloth as I have specified, as others well known as mechanical equivalents Vmay be substituted for them; neither 'do I confine my improvement to the precise former forms, arrangement or arrangements, of all or any of its parts, as circumstances may vary 2. Moving the cloth to be'sewed by a neethe same without changing the nature ofthe dle or its equivalent operating, substantially invention. n as herein set forth, to pierce thecloth and What I claim as my invention isf* move it the necessary distance required to 1. The formation of sewing in cloth or ot hform successive stitches. er material by the interlocking of two threads `In testimony whereof I have hereunto sub- .by the conjoint action of two needles in such scribed my name.A manner that each needle shall. be made to carry e T 1 i a loop of threadthrough a loop formed by the SHERBURAE C' ,BLODGNlT' other needle and through the cloth, whereby Vtnesses: one thread serves as a binding-thread to the HENRY COY, other7 substantially in the manner described. VWILLIAMS OGLE.

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