US513861A - Margaret mcdermott executrix of john mcdermott - Google Patents

Description

(No Moda.) 3 sheets-sheet 1.

T. F. BARNUM & J. MGDERMOT EMBROIDERING MACHINE.

No. 513,861. Patented Jan. so, 1894. I

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(No Model.)l 3 Sheets-Sheet 2.

T. F. BARNUM & J. MODERMOTT. EMBROIDBRING MACHINE.

No. 513,861. Patented Jan. 30, 1894.

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(No Model.)

No. 513,861. Patented Jan. 30, 1894.

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UNITED STATES PATENT OFFICE.

THEODORE F. BARNUM AND JOHN MODERMOTT, OF TROY, NEW YORK; MARGARET MCDERMOTT EXEOUTRIX OF JOHN MCDERMOTT, DEOEASED.

EMBROIDEFtlNG-MACHINE.

.SPECIFICATION forming part of Letters Patent N o. 513,861, dated January 30, 1894.

Application filed March 24, 1891. Renewed May 19,1893. Serial No. 474,835. (No model.)

.To a/ZZ whom it may concern:

Be it known that we',THEoDoRE F. BARNUM and JOHN MODERMOTT, citizens of the United States, residing at Troy, county of Rensselaer, and State of New York, have invented certain new and useful Improvements in Ornamental Sewing-Machines, of which the following is a specification.

Ourinvention relates to such improvements ro and consists of the novel construction and combination of parts hereinafter described and subsequently claimed. Y

Reference may be had to the accompanying drawings, and the letters of reference marked x5 thereon, which form a part of this specification.

Similar letters refer to similar parts in the several figures therein. Figure 1 is a view in side elevation of our zo improved ornamental sewing machine, with the lower part of the pattern-chains broken away. Fig. 2 is a top plan view of the same with the bracket-arm and cloth-clamp removed. Fig. 3 is a topplan view showing the z 5 cloth-clamp holding a piece of fabric upon the cloth-plate with a complete pattern-figure stitched therein. Fig. 4 is a vertical section of the clamp, fabric and cloth-plate, taken on the broken line, 4 4, in Fig. 3. Fig. 5 is a 3oV plan view of a section of one of the patternchains. Fig. 6 is a bottom plan view of one of the bifurcate levers acted upon by the patl tern-chains to communicate position m0ve` ments to the cloth-plate.

In our improved machine any of the Wellknown kinds of stitch-forming mechanism maybe employed. We prefer that mechanism which produces the Well-known lock-stitch with two threads, and we have shown in the 4o drawings only such parts of the stitch-forming mechanism as will aid in a full understanding of our invention, the leading features of which consist in the mechanism for automatically imparting to the cloth-plate, having a universal movement in a horizontal plane, intermittent position-movements alternating with the upward movements of the sewing-machine needle, and Variable in extent and direction as desired, whereby sew- 5o ing-machine stitches may be inserted in fabric or other material t0 form a figure thereon corresponding in form with a predetermined pattern; and the mechanism for clamping the fabric to the cloth-plate. The cloth-plate, upon which the fabric is clamped, is movable to and fro in a slide-way or upon guides secured to a slide-plate. The slide-plate is likewise movable 'to and fro upon the bedplate of the machine, butin a direction right angular to the direction of the relative movements of the cloth-plate. By communicating to both plates the necessary slide-movements, the desired parts of the clamped fabric can be successively brought to the proper position-point to successively and properly locate in the fabric the stitches required to form the desired figure, which position-pointnis in the fixed path of the needle. The required movements of the cloth-plate and fabric may be termed position-movements. The positionmovements are the resultant of the right-angular slide-movements of the movable plates. The slide-movements of each plate are produced by an independent set of patternchains, actuated by the sewing machine mechanism and having suitable connections with their respective plates.

Referring to the drawings, A- is the bedplate of the machine from one end of which is erected the standard, A', supporting the usual hollow bracket-arm, A2, containing the main driving-shaft, A3, provided with the drivingpnlley, A4, fixed thereon and auxiliary bearings, -A5, fixed upon the bracket-arm. The driving-shaft also has the usual camconnec tions, not shown in the drawings, with the needle-bar, A, for imparting vertically reciprocating movements thereto and to the needle A7, fixed in the lower end of the need le-bar.

The cloth-plate, B, is secured at one edge upon the guide-rod, B', by the lugs, B2, adapted to slide longitudinally of the rod, and the opposite edge of the plate is beveled, as shown at B3, to t and slide in the correspondingly beveled groove, B4, in the slide-plate, B5, as shown in Figs. l and 2. The slide-plate is provided With the bracket-lugs, B6, which support the guide-rod, B', the ends of which are fixed therein. The slide-plate is supported IOO on opposite sides by guide-rod, B1, secured at each end to a bracket-lug, B8, projecting from the bed-plate or fixed part of the machine. The slide-plate has on each of such sides a projecting lug, B9, adapted to slide longitudinally of the guide-rods, B7.

The guide-rod, B', which forms a slideway for the cloth-plate extends at-right angles to the guide-rods, B7, which form a slideway for the slide-plate, so that the cloth-plate neces sarily partakes of all the reciprocating movements imparted to the slide-plate; and, when independent slide-movements, right angular to the movements of the slide-plate, are imparted to the cloth-plate, the absolute or re` sultant movement of the cloth-plate affords what has been hereinbefore described as the position movement. Slide movements are communicated to the slide-plate by means of a pattern-chain, C', having the pins, or teeth, C, projecting from its exterior surface, one pin from each link, C2, of the chain. The pins have the function of teeth on a wiper- Wheel. The chain runs over the chainwheel, C3, and each link is provided with a pair of lugs or spurs, C4, projecting oppositely from the edges of the chain, adapted to enter and t corresponding grooves, C5, in the periphery of the chain-wheel. The periphery of the chain-wheel is also provided with a circumferential groove adapted to receive the body of the several links forming the chain which fit closely therein to prevent anylateral movement of the chain upon the chain-wheel. An intermittent revoluble movement is imparted to the chain-wheel by means of a pawl, CG, pivoted upon the lever, C7, and adapted to engage the ratchet-wheel, C8. The ratchet is fixed upon the chain-wheel shaft, C9, which has its bearings in the uprights, C10, and C12, xed to the bed-plate of the machine. The spring, C13, serves to keep the ratchet-Wheel in place when the pawl is not in action. The lever, C7, is pivoted at one end upon the chain-wheel shaft, and is provided with a friction roller, O14, adapted to follow the inclined plane or cam, C15, fixed to revolve with the gear-wheel, O1, which wheel is supported by a sleeve, C17, revoluble upon a stem, C18, fixed upon the bed-plate. The gear-wheel is driven by the gear-wheel, C19, fixed upon the vertical shaft, C20, having on its upper end a beveled gear, C21, adapted to engage with a beveled gear, C22, Iixed upon the main driving shaft, A3. The cam, C15, is so located upon the gear-wheel, that it engages the friction-roller, C14, while the needle is above the cloth-plate, and serves to move the periphery of the chain-wheel a distance equal to the length of one of the chain-links, causing one of the teeth, C, to enter between the arms, D, secured to the lever, D', which lever is pivoted, at D2, upon the standard, D3, secured to the bed-plate by screws, D4. The lever, D', is connected by link, D7, with rocklever, D8, fixed upon the vertical rock-shaft D9, and the rock-lever, D10, secured to the same rock-shaft, in a position right angular to the rock-lever, D8, is connected by link, D12, with the slide-plate.

It the tooth, C, is located opposite the passageway between the arms, D, it passes between the arms without impartingany movement thereto; but if the tooth is located on one side of the passageway, it will engage with that one of the arms located on the same side and swingr the lever, D', toward that side, thereby actuating the rock-shaft and, through it, imparting to the slide-plate a slide-movement. Should the next tooth in the series of teeth be located on the opposite side of the passageway, it'will engage the other arm and impart to the slide-plate through the various connections, a slidemovement in the opposite direction. By locating the teeth at the proper points in the series of links, any desired slide-movement may be imparted to the slide-plate each time a tooth passes between the arms. Another chain wheel, F, fixed upon shaft, F', supported by uprights, F2and F3, is provided with a similar pattern-chain, E. The intermittent movements of chainwheel, C3, are communicated to chain-wheel, F, through the gear, C11, fixed upon shaft, C, gear, F1, fixed upon shaft, F', and the intermediate gear, F5, supported on shaft, F6, by upright, F7. The teeth in chain, E, engage the arms, or jaws, F8, of the bifurcated lever, F9, to impart slide-movements to the clothplate, the bifurcated lever being connected by link, F10, with the lever F12, intermediately of its ends, one end of the lever being pivoted to the bed-plate at F13, and the otherend movably connected with a projecting arm, F14, fixed upon the cloth-plate. By properly locating the teeth in the chain, E, any desired slide-movement may be communicated to the cloth-plate simultaneously with and right-angularly to the movements of the slide-plate. A change in the position of the teeth on one or both of the pattern-chains will produce a corresponding change in the successive position-movements of the cloth-plate, and consequently in the form of the ornamental pattern-tigure produced by the stitches.

The slide-plate and the cloth-plate are each provided with a central aperture, I-I, H', suflciently large to form a clear passageway for the reciprocating needle in every position of the plates.

H2- represents the needle-aperture in the bed-plate of the machine. 1

We are well aware that it is common to move fabric-carrying slides by means of various styles of pattern-cams; but the mechanism heretofore employed was not adapted to accurately produce and reproduce the series of position-movements necessary for the successive formation of' distinct ornamental figures by means of stitches of considerable and varying amplitude. By causing the pattern to depend upon the location ot' the teeth laterally of the chains, without reference to the length of the teeth, all the movements of IIO vro

the bifurcate lever'are positive'and/no't springactuated. Thereis no superfluous movement `of the levers and slide-plates such as would -takeplace if'tthe tooth-engaging lever were a the constant positionby each successive tooth in the. pattern.l The bifurcate lever remains passive in the position in which it is left by.

the tooth last in engagement with it` until acted upon by the' nexttooth in the chain, so

that the movements are effected with little wear or strain upon the variousparts, the

teeth successively striking the jaws or bifur-` cate arms alternately. The bifurcate lever comprises the fram-e or arm,.D, pivoted at D2, to vibrate in a horizontal plane, andthe bifurcate frame, H3, pivoted at H4, upon the lever, D', to vibrate in a vertical plane. The bifurcate frame has a cross-bar, H5, which Y forms a bearing place for the spring, H6, xed

upon the lever-arm, D. The arms of the bifurcate frame support the detachable jaws, H7, which are directly engaged by the chainteeth. The spring, H6, presses thejaws down upon the chain-links to prevent them from tipping when the teeth strike the jaws. The bifurcate arms are also each provided with an adjustable shoulder consisting of aV screw, H8, inserted in a screw-threaded aperture in the arm. These shoulders are 4adapted to bear against opposite sides of thelever arm and relieve the strain upon pivot, H4. The jaws, H7, are made of steel plates and adjustably secured to the bifurcate arms by screws, H9, passing through slots in the plates into screw-threaded holes in the arms.y As an additional protection against a spreading movement of the jaws or plates whichmight otherwise be effected by-the engagement of the chain-teeth with the jaws, We provide the abutting screws, H10, adjustable in vscrew- Athreaded holes in the lugs, H12, depending from the bifurcate arms. Should the beveled edges, H13, of the jaws which are `engaged by the teeth wearl away, the jaws can be forced nearer together by the screws, H10. We are. thus able not only to easily and quickly adjust the various parts for accuracy and to take up the wear, but to detach worn teeth or jaws and substitute new ones therefor.

rlhe size of the ornamental figure can be varied by changing the pivotal connection of the link, D7, with lever, D', from one to the other of the holes, H14, in the lever, D', and in a similar vmanner the pivotal connection of the link, F10, with the lever, F9. Rotary cams, adapted to give positive reciprocating movements in both directions are impracticable for the reason'that their practical dimensions would not permit the required amplitude and number of position-movements necessary to produce the desired ornamental figures, which movements can be easily obtained by means of a toothed chain and bifurcate lever such as we have shown and described, of convenient dimensions. The teeth can be accurately located inthe respective chain-links to produce the enact movements required. The detachable teeth and j aw-plates can also be conveniently tempered or case-hardened to reduce variation due to wear; and when worn, they can be easily and quickly removed and new ones substituted. Y

The fabric, J, Figs. 3 and 4, is secured to the cloth-plate by a clamp whereby it is compelled to partake of the position movements of the plate.

Thepattern-gure, J', is` composed of a series of stitches of considerable and varying amplitude, and ifthey are inserted in thin or readily yielding fabric, the tension of the thread forming the stitches draws together and contracts that portion of the fabric inclosed by such stitches, causing the fabric to pucker and present a wrinkled appearance around they figure, unless the fabric is previously stretched at the place where the figure is to be inserted.- We therefore provide a clamp which will stretch the fabric about equally in two directions approximately right angular to each other, whereby the warp and woof threads of the fabric can be stretched about equally. The stitches forming the pattern ligure are frequently inserted in garments at the ends of pockets or other openings to provide an ornamental stay, and the garment seams give the fabrican uneven surface which would prevent an integral clamp from engagingthe fabricsecurelyon all sidesof the part designed to receive the iigure-forming stitches. The fabric-engaging portions of the clamp are therefore madein sections, each section having an independent spring-control. The U -shaped bracket, J2, supports the clampmechanism. rlhe arms of the bracket are approximately horizontal and located in the same vertical plane, the lower arm being secured at the open end of the bracket to the cloth-plate bythe screws, I, Fig. 2, and the upper arm supporting the clamp-levers, thereby affording room for the fabric to extend back between the arms to the connecting bend. The clamp mechanism comprises the integral rectangular frame, J 3, having the curved arms, J4, which terminate in a socket or eye, J5, adapted to receive the vertical supporting bar, J6, shown in horizontal section in Fig. 3. Each side bar of the rectangular frame supports an independent clamping section, J7, consisting of a piece of sheet-metal U shaped in cross-section, which is loosely supported upon the bar in an inverted position, as shown in Figs. l, 3 and 4. The inne'r wall of each clamping section has its lower edge smooth and the lower edge of the outer wall is serrated, as shown in Fig. l, and preferably extends a little below the smooth edge. The several clamping sections are each pressed down upon the supporting frame, J 3, or upon the subjacent fabric, by a spring, J8, secured to the clamp frame. The cloth-plate is provided with a rectangular flange or rib, K, around the needle hole, corresponding in form and size with lthe clamp frame, J i. The clamp frame is supported vertically above the clothplate liange by the slide-bar, J 6, which is vertically adjustable in the end of the upper bracket-arm. Slide movements are communicated to the slide-bar by means of the lever, J9, and springs, J1", and J12. The lever is pivoted upon the bracket; the spring, Jl), secured to the lever to bear upon the top or head, JIS, of the slide-bar to press it down; and the spring, J1?, is secured to the bracket in position to press upward upon the head, J13, or intervening lever, J9, to lift the slidebar and clampto the position shown in Fig. l. The clamp is pressed down to the position shown in Fig. 4, to bear upon the cloth-plate or interposed fabric, by means of the trip-lever, J1, pivoted upon the bracket-arm, which is turned from the position shown by the solid lines in Fig. l. When the clamp is forced downward into engagement with the fabric, the outer serrated edges of the clamp sections strike the fabric first and firmly engaging therewith draw and stretch it down over the outer side of the cloth-plate flange, K, while the inner smooth edgeof the sections draws the fabric against the inner side of the clothplate `flange and increases the tension upon that part of the fabric inclosed by the clamp. By inserting the ornamental figure in the fabric While thus clamped upon the cloth-plate, the tension of the stitches forming such figure will simply restore the fabric to its normal condition when released from the clamp, leaving it smooth and free from wrinkles.

What we claim as new, and desire to secure by Letters Patent, is

l. The combination with a sewing-machine and stitch-forming mechanism; of a slideplate movable transversely ofthe needle path a cloth-plate supported by the slide-plate and movable transversely of the slide-plate guides; a pair of pattern-chains; a series of detachable Wiper-teeth located upon the chains according to a predetermined pattern; revoluble chain-supporting wheels; means, substantially as described, for impartingto the chain-wheels intermittent revoluble movements; a pair of bifurcated levers each having an intermediate passageway for the wi perteeth, and oppositely-located, beveled, toothengaging surfaces which converge to such passageway; adjustable connections between such levers and movable plates; and a cloth clamp, substantially as described.

2. In an ornamental sewing machinehaving a movable cloth-plate and a toothed patternchain; a bifurcate lever, actuated by such chain and connected with the cloth-plate, comprising an arm pivoted to vibrate in a horizontal plane, a biturcate frame pivoted upon the arm to vibratein a vertical plane, a spring connection between the arm and frame, and beveled tooth-engaging jaws upon the bifurcate frame, substantially as described.

3. In an ornamentalsewing-machinehaving a movable cloth-plate and a toothed patternchain, the combination with a bifucate lever and connections between such lever and movable plate; of a pair of beveled, tooth-engaging jaw-plates detachably and adjustably secured to the arms of the bifurcate lever, substantially as described.

4. rlhe combination with a sewing-machine cloth-plate havinga raised flange around the needle-hole; of a movable cloth-clamping frame adj ustably supported vertically above such flange; and a plurality of spring-controlled clamping-sections supported by the cloth-clamping frame, and vertically movable thereon, substantially as described.

5. The combination with a sewing-machine cloth-plate having a liange raised therefrom in the general form of a rectangle with the needle-hole in the center; of a cloth-clamp comprising a vertically adjustable rectangular frame; and a spring-controlled clamping section, U-shaped in cross-section, on each side-bar of the rectangular frame, the several sections having their lowerinner edges smooth and their lower outer edges serrated, substantially as described.

6. The combination with a sewing-machine needle and stitch-forming mechanism; of a slide-plate movable transversely of the needlepath; a cloth-plate supported by the slideplate and movable transversely of the slideplate guides; a raised flange around the needle-hole in the cloth-plate; means for communicating to the two plates separate slide movements; and a vertically adjustable vclothclamp supported by the cloth-plate vertically above the raised flange, and comprising a plurality of spring-controlled sections vertically movable independently of `each other, substantially as described. l

In testimony whereof we have hereunto set our hands this 16th day of March, 1891.

THEO. F. BARNUM. J OHN MCDERMOTT.

Witnesses:

Guo. A. MosHER, FRANK C. CURTIS.

IOO

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