US648618A - Buttonhole-sewing machine. - Google Patents
Buttonhole-sewing machine. Download PDFInfo
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- US648618A US648618A US44912192A US1892449121A US648618A US 648618 A US648618 A US 648618A US 44912192 A US44912192 A US 44912192A US 1892449121 A US1892449121 A US 1892449121A US 648618 A US648618 A US 648618A
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- stitches
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- machine
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- buttonhole
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
- D05B3/06—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for sewing buttonholes
- D05B3/08—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for sewing buttonholes for buttonholes with eyelet ends
Definitions
- This invention relates to two-needle sewing-machines which can make two separate adjacent opposite rows of zigzag or to-andfro stitches simultaneously.
- the general objects of this invention are to produce a two-needle sewing-machine which will automatically make of a certain limited length two opposite rows of zigzag or to-andfro stitches simultaneously along the two sides of a buttonhole, to produce a two-needle sewing-machine which will automatically make of a certain limited length two opposite rows of zigzag or to-and-fro stitches simultaneously along the sides of a buttonhole and barring-stitches at one end of said two rows of stitches, to produce a two-needle sewing-machine which will automatically stitch a buttonhole by first making barring-stitches at one end of it, then makingsimultaneously two rows of zigzag or to-and-fro stitches along its sides, and next ymaking barring-stitches at its other end.
- Figure l represents a rear elevation and partial section ot' the main portions of a well-known Singer two-needle sewing-machine with parts of one form of my invention combined therewith.
- Fig. 2 shows a front elevation and partial section of portions of the same with an automatic stopping
- Fig. 3 represents front elevations of sections of the same mechanism at or near the lines ,e .e and z z' in Figs. l, 2, and 12 and of some parts in rear of those sections.
- Fig. 4 shows front elevations of sections at or near t'helines'y i/and y' 'y' in Figs. 1, 2, and l2 and of some partsinrearof these sections.
- Figs. 5, and 6 are plans illustrating a part of said stopping mechanism.
- Figs. 7, 8, 9, and 10 are plans illustrating a modification.
- Fig. 11 represents in end elevation detached parts of an adjustable pivot-fulcrum shown in Fig. 4.
- Fig. l2 is a plan of the feeding mechanism in one position
- Fig. 13 is a plan of much of the same in another position.
- Fig. 14 shows a section of a part of the same at the line of: 00in Fig. 13.
- Figs. 15, 16, 17, 18, 19, and 20 are plans of parts of the mechanism represented in Figs. l2 and 13.
- Figs. 21, 22, 23, 2-4, 25, 26, 27, 28, and 29 indicate successive positions of the two needles in making the stitches represented in these figures, and Fig.
- FIG. 30 further illustrates the barring-stitches shown in Fig. 25.
- Figs. 31, 32, 33, 34, 35,736, 37, 38, 39, 40, 41, 42, 43, and 44 approximately illustrate plans of the upper and under sides of some buttonhole-stitchings as made by mechanisms represented in the drawings.
- A is the bed, A the fixed standard and arm, and Bv is a rotary driving-shaft which by a crank and pitman B reciprocates vertically the needle-bar C, having attached thereto the two eye-pointed needles ab, and the shaftB by a cam B2 operates the take-up lever B3 and through a crank and pitman Bv1 and an armed rock-shaft B5 oscillates the armed shaft B6, having an attached driver which oscillates the two hook-shuttles D D in their circular races D2 D3, all essentially the same as in a well-known Singer two-needlelock-stitch sewing-machine; but-the principal parts of this invention are applicable to any suitable twoneedle sewing-machine.
- E is a work-clampl which may be of any suitable kind and operated by any suitable mechanism to properly hold the buttonhole work or fabric, as Z, and carry or slide it lengthwise with the work-clamp a certain predetermined limited distance upon the worksupporting throat-plate A2 for the two stitchforming devices to act upon the ⁇ work.
- the work-clamp E is shown secured by the arm E to the slide E2, which ts in guides E3 and receives a step-by-step movement lengthwise of the work-clamp a certain IOO l l i l l i limited distance to and fro by a pitman E from a radially-adjustable crank-pin q, secured to the feed-wheel F, which is normally turned a' step by the sewing-machine at each alternate elevation of the needle-bar.
- Vhen the crank-pin q, center of the, wheel F, and the pivot-stud q' on the slide E2 are all in a straight line, as indicated in Fig.
- the two needles a b are secured to the needle-bar C at a suitable distance apart and are normally in or nearly in a plane transverse to the length of the work-clamp.
- the needle av operates the thread c and the needle b operates the thread d
- the hooked shuttle D carries the thread e and the shuttle D carries the thread f
- normally the needle a and shuttle D coact in making one set of stitches and the needle Z1 and shuttle D coact in forming the other set of stitches.
- the slide G which has theguides E3 and is mounted in guides g g' on the Xed base-plate Ag and tranverse to the slide E2.
- the slide Gr is connected by a pivot 7L to a lever II, Figs.
- a two-needle sewing-machine having combined therein a work-clamp mechanism to automatically make two separate opposite adjacent sets oi" to-and-fro stitches simultaneously and mechanism to automatically move the work-clamp step bystep lengthwise a certain predetermined limited distance in one direction or in two opposite directions, substantially as above described, can automatically make ol' a certain limited length two rows of zigzag or to-and-fro stitches simultaneously along the two sides of a b uttonhole.
- Fig. 21 indicates a mode in which the abovedescribed mechanism will simultaneously make two separate opposite rows of to-andfro or zigzag lock-stitches, as along the two sides of a buttonhole, one of said two rows of stitches being made by the eye-pointed needle a and hooked shuttle D from the needle- ,thread c and shuttle-thread e and the other row being made by the needle b and shuttle D' from the needle-thread d and shuttlethread f.
- the drawings represent the two needles a b secured to the cylindrical needle-bar C at opposite sides of it and at equal distances from its central line, and the needle-bar is mounted in bearings, so that it can be semirotated therein to and fro, to thereby cause either needle to coact and form stitches with either shuttle, the
- driving-pitman B being pivoted to a loose sleeve C between two collars C2 C3, secured on the needle-bar.
- the upper part of the needle-bar is a pinion C4, which engages with a toothed rack or bar K, mounted to be slid endwise to and fro, as in xed bearings Zr Ze',
- the bar L is not engaged with the driving-pin h',v but rests at its heel Z3, as in Fig. 1, on a standing arm M, which has in a stationary bearing m a horizontal axis m', with an attached lateral arm N, Figs. 3, 4, 12, and 13, extending over a part of the feed-wheel F, which has two attached diametrically-opposite stitch -controlling cams or projections n n, arranged so as to elevate and keep elevated the arm N, and thereby move and hold the arm M, as in Fig.
- N' is a stop-screw on the arm N to regulate the extent of its downward movement in respect to the parts fn, 'n' on the feed-wheel.
- Figs. 22, 23, 24, 25, 30, 33, and 34:, and'Figs. 2G, 27, 2S, 29, 31, and 32 illustrate the formation of two opposite rows of zigzag stitches and barring-stitches connecting the ends of the two rows of zigzag stitches and composed of continuations of the four threads of the two rows of stitches as automatically produced by the above-described mechanism.
- barring-stitches are made by said mechanism when the work-clamp moves step by step lengthwise and momentarily to and fro transversely, the same as when the two rows of zigzag stitches are beving made, and said barring-stitches are produced in consequence of the repeated to-andfro, semicircular, or approximately semicircular lateral movements of the two needles about their common axis, midway between them, such semicircular movements of the two needles being in one direction at one transverse movement of the work-clamp and in the opposite direction at the reverse transverse movement of the work-clamp, so that the needles coact with the different shuttles alternately-'in making these barring-stitches.
- Figs. 23, 24, 25, 27, 28,29, 30, 3l, and 33 show long barring-stitches CZ', extending on the upper surface of the fabric Z entirely across the stitching of the buttonhole and formed from the thread CZ by the needle b and bound down at its middle by short stitches c', formed from the thread c by the needle a, and extending downward through the fabric and laterally in the form of loops c2, Figs. 30, 32, and 34, at both sides of the buttonhole, so as to thereby bar it, the tensions on the threads c, CZ, c, and f beingsuitably adjusted.
- Figs. 3l and 32 illustrate the stitchings' on the upper and under surfaces of a buttonhole stitched by the above-described mechanism as its work-clamp is moved lengthwise in one direction
- Figs. 33 and 34 represent stitchings on the two surfaces of another buttonhole as stitched by the same machine when its work-clam p is moved lengthwise in the reverse direction.
- Figs. 27, 28, 29, and 3i show each long barring-stitch CZ bound downat its middle by one short stitch c', as may be done by the above-described mechanism when the workclamp moves lengthwise in one direction
- Figs. 23, 24, 25, 30, and 33 show the long barring-stitches CZ bound down by one or two short stitches c, as may be done by the same mechanism when its work clamp moves lengthwise in the reverse direction.
- stitches by short ones may, can, or will be' somewhat diierent, according to the direction and length of the lengthwise steps of the workclamp, somewhat different positions and length of arc of the semicircular or approximately semicircular to-and-fro movements of the needles, and different adjustments of the tensions of the several threads of the stitching.
- the machine first makes barringstitches at one end of the buttonhole until by the turning of the feed-wheel the said cam n leaves and lets down the arm N, and then the i machine makes two rows of zigzag or two-andfro stitches Y Y' simultaneously along the two sides of the buttonhole until by the turning of the feed-wheel the other cam n elevates the arm N, and thereby causes the machine to make barring-stitches at the other end of the buttonhole until the work-clamp arrives at the end of its said lengthwise movement in one direction, whereupon the machine is to be stopped, while the arm N remains elevated by the cam n', and the stitched work is to be removed from the clamp and unstitched work secured therein.
- the sewing-machine can thus automatically stitch and bar a buttonhole by making, first, barring-stitches at one end of it, then two rows 'of zigzag or two-and-fro stitches simultaneously along its sides,and then barring-stitches at its other end while moving the work-clamp lengthwise a certain limited distance in one direction and can likewise stitch and bar another buttonhole while moving the workclamp the same distance lengthwise in the reverse direction.
- the sewing-machine will automatically stitch the two sides of a buttonhole simultaneously and bar only one end thereof while the machine moves the work clamp lengthwise in either direction.
- the barring-stitches will be made irst when the work-clamp is being thus moved lengthwise in one direction and last when the workclam p is being moved in the reverse direction.
- the pinion F' revolves just twice to the wheel F once, so that instead of having two cams, as n n', on the wheel F one such cam on the pinion F can operate the arm N to control the action of the stitch-changing mechanism to produce barring-stitches, as hereinbefore described; and it is evident that instead of having such cam or cams in the form of a projection or projections the same can be in the form of a corresponding depression or depressions in a suitable ring on the pinion F' or wheel F, the standing arm M, Figs. l, 3, 4 and 13, being correspondingly adjusted on its anisl in relation to the heel Z3 of the bar L, as by set-screwsm.
- the herein-described stitch-changing mechanism or any equivalent therefor to automatically cause a two-needle sewing-machine to temporarily make barring-stitches at one end or at the two ends of the formation of two rows of zigzag or to-and-fro stitches simultaneously can be controlled in its action by any suitable connection or connections with the wheel F, or pinion F', or ratchet-wheel R, or pitman E4, or slide E2, or arm E', or work-clamp E, or any equivalent for either of those parts, or any part which shall move in unison or in harmony with the lengthwise movements of the workclamp in whatever two-needle sewing-machine my broad invention shall be embodied.
- the pivot stud or fulcrum I is shown formed with the head t', journalstem z", shoulders '52, iiattened stem 723, and screw-stem t4 and furnished with the sleeve o, washer 0, washer o2, and jam-nuts 03 04, by means of which the pivot-stud can be either clamped fast to the standard A4 at various heights or set to be slid closely upward and downward on that standard, as by the forked varm O, whose extent of movement can be varied by means of the adjustable pivot p, connecting the levers P and N, and the stopscrew N', above mentioned. If the pivot p be removed, the arm O will not act.
- buttonshole-stitchings such as are indicated by Figs. 3l and 32, or 33 and 34, or 35 and 3G, or 37 and 38, or43, by the abovedescribed mechanism its work-clamp is moved lengthwise step by step in making the barring-stitches, as well asin forming the two rows of zigzag stitches.
- I furnish the mechanism with devices to automatically prevent, retard, lessen, or stop the lengthwise movement of the Work-clamp while the barring-stitches are hobos made.
- One device for this purpose consists of a lost-motion connection between the pitman E4 and the workclamp slide E2 or the feed-wheel F, one forml IOO tion when the arm N is elevated and its end part n2, Fig.
- the shield S has a few teeth s", which coincide with the teeth of the ratchet-wheel and are just between two projections S5 s, that have ratchetteeth entirely beyond the ratch et-wheel,which extends beyond the toothless partof the shield.
- This shield has its teeth s4, projections 35 s, and the forward end .s3 of its slot so arranged in relation to the pin i' of the ratchet-wheel, driving-.pawl j, the work-clamp, and intermediate operating connections that when the machine is stopped with the work-clamp at one end of its lengthwise movement and the middie part of a stitch-controlling cam, as n, elevating the end n2 ot the arm N the pawl j will then normally engage the teeth S4 of the shield and coinciding teeth of the ratchetwheel, as indicated in Figs. 13 and 18.
- the machine will then make the two rows of zigzag stitches sim nltaneously, while the pawl j turns forward the ratchet-wheel step by step, and thereby the shield, after the pin fr has overtaken the advanced forward end s3 of the slot s and until the projection s6 meets the pawij and lifts it out of the ratchet-wheel, whereuponthe two rows of stitches will have been completed and a stitch-controller, as n', will have thrown the barring devices into action. Then the machine will make barringstitehes hunched or close together, about as indicated at X4, X5, or X6 in Figs.
- the shield on the ratchet-wheel R of the feeding mechanism need have only one suitable toothed projection, as 35 or S6, when the machine shall be used to stitch a huttonhole with hunched barring-stitches at only one end of it and with spaced barring-stitches or no barring-stitches at its other end, or when the machine shall make hunched barringstitches at cach end of a buttonhole and the pawlj shall engage the middle part of such one-toothed projection when the machine is stopped at the completion of the stitching of a buttonhole at the end of each half-revolution of the feed-wheel.
- the lost-motion device illustrated by Figs. 7, S, 9, and l0 shall be used in making hunched barring-stitches at one end only of a buttonhole, the making of such one bunch of stitches will use all proper lost motion hetween thc pivot-pin q' and the oblong socket q2 at one end of the lengthwise movement of the work-clamp in either direction, and the sewing-machine is to he stopped at the end of each half-revolution of the feed-wheel F, as the stitching of each buttonhole is completed either just as the pitman E4 ceases to move the work-clamp slide E2, as indicated in Fig.
- the machine can he used to stitch a buttonhole with hunched harringstitches at one end of it and with spaced barring-stitches or no barring-stitches at its other end, according as the machine shall be adjusted tomake harring-stitches at both ends or at only one end of a huttonhole.
- any suitable stopping device or mechanism that will automatically release the driving mechanism from and apply a clutch or brake to the sewing-machine when its work-clamp is at the end of its lengthwise movementin one direction, or in either one of two opposite directions, or when the stitching of a but-tonhole is completed and the feed-wheel or device for moving-the work-clamp lengthwise a certain limited distance is in a certain predetermined part of its movement.
- the drawings show the shaft B, Fig.
- U is a shipper-lever which has a fixed pivot-fulcrum at u', a lower arm u2 extending forward, a rear arm, with a finger U3 to press against a rear central bearing on the pulley Q, and a forward arm with a brake a4 to bear against the front face of the balance-wheel.
- U is a spring which constantly tends to press the lever U into its position indicated by broken lines in Fig. 2.
- T is a trip-lever having a fixed pivot-fulcrum at t2
- Figs. l2 and 13 and T, Fig. 3, is a spring which constantly tends to press andhold thelever Tin its place.
- the feed-wheel F which in Figs. 5 and 6 is indicated by a dotted circular line, has attached adjustablyto its under surface two trips, as t t', Figs.
- the trips t and t' are to be ordinarily adjusted to cause the machine to stop when the pin q' is at the middle of the oblong socket q2 in the pitman, as indicated in Figs. 7 and 10.
- the pinion F' and ratchet-wheel R each has one complete revolution to the wheel F one-half of a rotation
- one trip on the pinion orou the ratchetwheel or on any suitable part moving in unison therewith may serve instead ot' the two trips on the feed-wheel to coact with the lever T to stop the machine.
- one trip as 154, Figs.
- the lever T is shown with a bent arm t6, so that a person can' thereby conveniently pull and turn that lever from under the catch Q22, and thus cause the machine to stop when the stitching of a bu ttonhole is completed or when the work-clamp is at either end of its lengthwise movements or wheneverit is desirable to stop the machine.
- My invention is above described as applied to a two-needle sewing-machine in which the work-clamp is moved momentarily to and fro transversely to make thetwo opposite sets of to-and-fro stitches simultaneously.
- My invention is also applicable to any suitable twoneedle sewing-machine in which the two needles or the two needles and their complemental shuttles or loopers are moved momentarily to and fro transversely to the length of the work-clamp or direction of feed to produce the two opposite sets of tio-and-fro stitches.
- the drawings show the guides E3, Fig. 13, with a tongue g2 fitting between lengthwise guides g3 g4 on the slide G and adjustably fastened by set-screws g5, so that the guides are reciprocated by and with the slide, as Upon suitably loosening the screws g5 the guides E3 can be held stationary, as by a removable pin (indicated by dotted lines at g in Fig. 3) extending tightly through perforations in the part E3 and plate A3 and freely through alarge opening in the slide Gr, so that the latter will then be freely reciprocated by the lever H, while the workclamp slide E2 will be movedv step by step lengthwise to and fro, as above described, in its then stationary guides.
- a removable pin indicated by dotted lines at g in Fig. 3
- Fig. 1 can be mounted in a carrier vibrating or reciprocating horizontally on the head of the machine transversely to the length of the work-clamp, to thereby produce to-and-fro stitches essentially as in some well-known buttonhole-sewing machines, and in the machine represented by the drawings such a needle-bar carrier could be thus reciprocated by being connected with the reciprocating slide G, as by a rod, indicated by broken lines at G in Fig. 1.
- the needle-bar carrier could or would carry the forward support Z of the bar L and have bearings for the forwardl parts of the connected bars L and K, so as toreciprocate these bars horizontally with the needle-bar in making the to-and-fro stitches and permit the bar L to be temporarily connected with and reciproca-ted a longer strokeA by the lever l-l to cause the semirotations to and fro of the needle-bar in making barring-stitches, as hereinbei'ore described.
- the two shuttle-races D2 D3, holding the two shuttles D D' can be mounted in suit-able guides and,horizontally reciprocated transversely to the length of the work-clamp, as by being connected to the reciprocating slide Gr by a rod or bar (indicated by broken lines at G2 in Fig. ⁇ 1) and extending through suitable apertures in the plates under the slide G, so that the shuttles would be reciprocated with the needles transversely to the length of the work-clamp in making IIO the two rows of zigzag stitches and the barring-stitches.
- My invention as shown by the aforesaid drawings and above described, is illustrated as applied to a sewing-machine in which the Work-clamp is moved lengthwise a certain limited distance by the machine to feed the work to the stitch-forming devices, as I commonly prefer; but in carrying out my invention t-he work-clamp may not have any lengthwise movement and the sewing-machine may move the stitch-forming mechanism step by step a certain limited distance lengthwise of the work-clamp to feed the stitch-forming devices to the work-for instance, as indicated by broken lines in Figs.
- stitch-forming mechanism comlprising two needles and two sets of complelmental parts, of a work-support, mechanism 'for producing between said stitch-forming mechanism and work-support, a relative feed- 'ing and jogging movement suitable for form- ⁇ ing two independent rows of stitches for the sides of a buttonhole, a stitch-regulating mechanism which normally acts momentarily to and fro a certain distance transversely to the length of the work-support, and a stitchchanging mechanism which will automatically alter the extent of action of said stitchregulating mechanism during the formation of the barring'- stitches, and simultaneously cause a relative swinging movement between the needles.
- stitch-forming mechanism comprising two needles and two sets of complemental parts, of a work-support, mechanism for producing between said stitch-forming mechanism and work-su pport, a relative feeding and jogging movement suitable for forming two independent rows of stitches for the sides of a buttonhole, a stitch-regulating mechanism which normally acts momentarily to and fro a certain distance transversely to the length of the work-support, and a stitchchanging mechanism which will automatically alter the extent of action of said stitchregulating mechanism during the formation of the barring-stitches.
- stitch-forming mechanism comprising two needles and two sets of complemental parts, of a work-support, mechanism for producing between said stitch-forming mechanism and work-support, arelative feeding and jogging movement suitable for forming two independent rows of stitches for the sides of a buttonhole, a driving mechanism, a normally-inactive stitch-changing mechanism which when in action will cause the sewing machine to make barring stitches, a stitch-controller, or cam, moving in harmony with said mechanism producing a relative feeding and jogging movement between said stitch-forming mechanism and said support, and a connectionbetween said stitch-controller or cam and said stitch-changing mechanism whereby the stitch-changing mechanism is temporarily caused to be engaged with, actuated by, and disengaged from, said driving mechanism.
- the combination, substantially as dcscribed, with stitch-forming mechanism comprising two needles and two sets of complemental parts, of a work-support, mechanism for producing between said stitch-forming mechanism and work-support a relative feeding and jogging movement suitable for forming two independent rows of stitches for the sides of a buttonhole, a normally-inactive stitch-changing mechanism which when in action will cause a relative swinging movement between the needles to make barringstitches, a driving device for said stitchchanging mechanism, a stitch-controller moving in harmony with said feed mechanism, and a connection between said stitch-controller and said stitch-changing mechanism, whereby the latter is temporarily caused to be engaged with, actuated by and disengaged from said driving device.
- stitch-forming mechanism comprising two needles and two sets of complemental parts, of a work-support, mechanism for producing between said stitch -forming mechanism and work-support, a relative feeding and jogging movement suitable for forming two independent rows of stitches for the sides of a buttonhole and the necessary movement for forming barring-stitches, a normallyinactive stitch changing mechanism which when in action will cause a relative swinging movement between the needles to make barring-stitches, a vibrating lever, a stitch-controller moving in harmony with the relative movement of the work-clamp and stitch-forming mechanism,and a connection between said stitch-controller and said stitch-changing mechanism whereby the latter is temporarily caused to be engaged with, actuated by, and disengaged from said vibrating lever.
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Description
. No. 648,6I8. Patented May |,.I900..
J. T. HOGAN. BUTTDNHOLE SEWING MIAIGHINL.
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. Patented May I, |900. J. T.. HOGAN. BUTTDNHULE SEWING MACHINE.
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No. 648,618. Patented May I, |900.. i J. T. HOGAN. v v BUTTUNHULE SEWING MACHINE.
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No. 648,618. Patented may 4, |900.
l .1. T. HOGAN. h BUTTONHOLE SEWING MACHINE.
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UNITED STATES PATENT il' EETCE.
JAMES T. HOGAN, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO THE NATIONAL MACHINE COMPANY, OF TROY, NEW YORK.
BUTTONHOLE-VSEWING MACHINE.
SPECIFICATION forming part of Letters Patent NO. 648,618, dated. May 1, 1900.
Application filed October 17,1892. Serial No. 449,121. (Model.) l
T0 @ZZ whont it may concern:
Be it known that I, JAMES T. HOGAN, a citizen of the United States, residing at Jersey City, in the ,county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Machines for Stitching Buttonholes, of which the following is a specification, reference being had to the accompanying drawings.
This invention relates to two-needle sewing-machines which can make two separate adjacent opposite rows of zigzag or to-andfro stitches simultaneously.
The general objects of this invention are to produce a two-needle sewing-machine which will automatically make of a certain limited length two opposite rows of zigzag or to-andfro stitches simultaneously along the two sides of a buttonhole, to produce a two-needle sewing-machine which will automatically make of a certain limited length two opposite rows of zigzag or to-and-fro stitches simultaneously along the sides of a buttonhole and barring-stitches at one end of said two rows of stitches, to produce a two-needle sewing-machine which will automatically stitch a buttonhole by first making barring-stitches at one end of it, then makingsimultaneously two rows of zigzag or to-and-fro stitches along its sides, and next ymaking barring-stitches at its other end. These objects and others hereinafter specified are accomplished by mechanisms essentially such as are hereinafter described, and represented in the aforesaid drawings.
In said drawings, Figure l represents a rear elevation and partial section ot' the main portions of a well-known Singer two-needle sewing-machine with parts of one form of my invention combined therewith. Fig. 2 shows a front elevation and partial section of portions of the same with an automatic stopping Fig. 3 represents front elevations of sections of the same mechanism at or near the lines ,e .e and z z' in Figs. l, 2, and 12 and of some parts in rear of those sections. Fig. 4 shows front elevations of sections at or near t'helines'y i/and y' 'y' in Figs. 1, 2, and l2 and of some partsinrearof these sections. Figs. 5 and 6 are plans illustrating a part of said stopping mechanism. Figs. 7, 8, 9, and 10 are plans illustrating a modification. Fig. 11 represents in end elevation detached parts of an adjustable pivot-fulcrum shown in Fig. 4. Fig. l2 is a plan of the feeding mechanism in one position, and Fig. 13 is a plan of much of the same in another position. Fig. 14 shows a section of a part of the same at the line of: 00in Fig. 13. Figs. 15, 16, 17, 18, 19, and 20 are plans of parts of the mechanism represented in Figs. l2 and 13. Figs. 21, 22, 23, 2-4, 25, 26, 27, 28, and 29 indicate successive positions of the two needles in making the stitches represented in these figures, and Fig. 30 further illustrates the barring-stitches shown in Fig. 25. Figs. 31, 32, 33, 34, 35,736, 37, 38, 39, 40, 41, 42, 43, and 44 approximately illustrate plans of the upper and under sides of some buttonhole-stitchings as made by mechanisms represented in the drawings.
In the drawings similar letters referto similar parts throughout the several views.
A is the bed, A the fixed standard and arm, and Bv is a rotary driving-shaft which by a crank and pitman B reciprocates vertically the needle-bar C, having attached thereto the two eye-pointed needles ab, and the shaftB by a cam B2 operates the take-up lever B3 and through a crank and pitman Bv1 and an armed rock-shaft B5 oscillates the armed shaft B6, having an attached driver which oscillates the two hook-shuttles D D in their circular races D2 D3, all essentially the same as in a well-known Singer two-needlelock-stitch sewing-machine; but-the principal parts of this invention are applicable to any suitable twoneedle sewing-machine.
E is a work-clampl which may be of any suitable kind and operated by any suitable mechanism to properly hold the buttonhole work or fabric, as Z, and carry or slide it lengthwise with the work-clamp a certain predetermined limited distance upon the worksupporting throat-plate A2 for the two stitchforming devices to act upon the` work. In the drawings the work-clamp E is shown secured by the arm E to the slide E2, which ts in guides E3 and receives a step-by-step movement lengthwise of the work-clamp a certain IOO l l i l l i limited distance to and fro by a pitman E from a radially-adjustable crank-pin q, secured to the feed-wheel F, which is normally turned a' step by the sewing-machine at each alternate elevation of the needle-bar. Vhen the crank-pin q, center of the, wheel F, and the pivot-stud q' on the slide E2 are all in a straight line, as indicated in Fig. 13, by then turning the wheel F through one-half of a revolution the slide 472and work-clamp E will be moved lengthwise ot' the work-clamp a certain limited distance in one direction and will be moved the same distance in the reverse direction by turning the wheel F through the other one-half of said revolution.
The two needles a b are secured to the needle-bar C at a suitable distance apart and are normally in or nearly in a plane transverse to the length of the work-clamp. The needle av operates the thread c and the needle b operates the thread d, while the hooked shuttle D carries the thread e and the shuttle D carries the thread f, and normally the needle a and shuttle D coact in making one set of stitches and the needle Z1 and shuttle D coact in forming the other set of stitches.
To render the above-specified two-needle sewing mechanism capable of making simultaneously two separate, opposite, parallel,and adjacent rows of to-and-fro or zigzag stitches as its work-clamp is moved step by step lengthwise in one direction, I combine with such mechanism devices which at each elevation of the needle-bar and needles will move the work-clamp or the two needles or the two needles and shuttles momentarily a certain distance transversely to the lengthwise movement of the work-clamp, said movement transversely being somewhat less or no greater than the horizontal distance between the points ot the two needles and being in one direction at one elevation of the needles and in the opposite direction at the next elevation of the needles. As one means to accomplish this object the drawings show the workclamp slide E2, Figs. 12 and 13, carried by the slide G, which has theguides E3 and is mounted in guides g g' on the Xed base-plate Ag and tranverse to the slide E2. The slide Gr is connected by a pivot 7L to a lever II, Figs. 1, 2, and 4, which is furnished with a pivotfulcrum I, adjustable along the lever and vertically on the xed standard A4, and has a followerJ, working in a switch-cam J on the driving-shaft B, whereby at one elevation of the needles the work-clamp is moved transversely in one direction, as indicated by the arrow w, and is moved inthe opposite direction (indicated by the arrow yv) at the next elevation of the needles, and so on repeatedly, the fulcrum I of the lever I-I being normally adjusted on the standard A4, so asto cause that lever to move the slides GF.g and workclamp E momentarily to and fro a distance somewhat less or not greater than the horizontal distance between the points of the two needles to make the two rows of zigzag ortoand-fro stitches separate and apart for a slit between them.
For rotating the feed-wheel F step by step in harmony with the reciprocating movements of the needlebar the drawings show that gear-wheel carried by the slide Gr and as rethe feed-wheeler any equivalent therefor can be rotated step by step by other means and at every elevation of the needle-bar, as set forth in Patent No. 362,771, May 10, 1887, and generally the work-clamp can be moved step by step lengthwise in harmony with the elevations of the needle-bar and a certain limited distance to and fro by any suitable automatic mechanism-as, for instance, such as are describedin Patents Nos. 303,453 and 303,557, ot August 12, 1884:.
A two-needle sewing-machine having combined therein a work-clamp mechanism to automatically make two separate opposite adjacent sets oi" to-and-fro stitches simultaneously and mechanism to automatically move the work-clamp step bystep lengthwise a certain predetermined limited distance in one direction or in two opposite directions, substantially as above described, can automatically make ol' a certain limited length two rows of zigzag or to-and-fro stitches simultaneously along the two sides of a b uttonhole. rlhis relsult will be accomplished by the above-described sewing-machine upon first securing the Work in the clamp when the machine ls stopped and the work-clamp is at oneaend of its limited lengthwise movement in either direction, then operating the sewing-machine until the work-clamp is at the other end of its said lengthwise movement, and thereupon stopping the machine, as by hand or by automatic means, of which one form is hereinafter described.
Fig. 21 indicates a mode in which the abovedescribed mechanism will simultaneously make two separate opposite rows of to-andfro or zigzag lock-stitches, as along the two sides of a buttonhole, one of said two rows of stitches being made by the eye-pointed needle a and hooked shuttle D from the needle- ,thread c and shuttle-thread e and the other row being made by the needle b and shuttle D' from the needle-thread d and shuttlethread f.
wWith a two-needle sewing-machine which can automatically make of a certain limited IOO IIO
length two separate opposite adjacent rows of to-and-fro or zigzag stitches simultaneously along the two sides of a buttonhole, essentially as hereinbefore described, I combine stitch-changing mechanism to temporarily impart extraordinary lateral movements to the two needles or to the stitch-forming devices or to the work-clamp or to some of these parts of the sewing-machine, so as to thereby cause the sewing-machine to automatically make barring-stitches at the beginning or at the ending or at the beginning and the ending of the formation of said two rows of zigzag or to-and-fro stitches. As one means for that purpose the drawings represent the two needles a b secured to the cylindrical needle-bar C at opposite sides of it and at equal distances from its central line, and the needle-bar is mounted in bearings, so that it can be semirotated therein to and fro, to thereby cause either needle to coact and form stitches with either shuttle, the
driving-pitman B being pivoted to a loose sleeve C between two collars C2 C3, secured on the needle-bar. The upper part of the needle-bar is a pinion C4, which engages with a toothed rack or bar K, mounted to be slid endwise to and fro, as in xed bearings Zr Ze',
Figs. 1 and 12, and furnished with an arm K",
slotted and engaged with a pin 7a2, Figs. 1 and 3, on a slide-rod L, having at its forward part a slot Z, fitting on a supporting-pivot Z Aand furnished with a downWardly-pressin g spring L' near its rear part. The rear end part of the rod L has a recess Z2, which While fitting on the pivot-pin ZL on the lever H will enable that lever in its aforesaid to-and-fro movements to slide the connected bars L and K lengthwise to and fro, and thereby impart to the needle-bar to-and-fro semicircular movements about its axis. During the simultaneous formation of the two opposite rows of zigzag stitches the bar L is not engaged with the driving-pin h',v but rests at its heel Z3, as in Fig. 1, on a standing arm M, which has in a stationary bearing m a horizontal axis m', with an attached lateral arm N, Figs. 3, 4, 12, and 13, extending over a part of the feed-wheel F, which has two attached diametrically-opposite stitch -controlling cams or projections n n, arranged so as to elevate and keep elevated the arm N, and thereby move and hold the arm M, as in Fig. 4, away from under the heel of the bar L and let the latter be and remain engaged with and reciprocated by the pin Zt of the lever II when the sewing-machine is stitching at or near or at and near the end parts of the lengthwise movements of the work-clamp. Vhen in the rotation of the feed-wheel F the cam n or n ceases to elevate or support the arm N and the bar L is atthe forward end of its lengthwise movement, as in Fig. 2, a spring M then moves the arm M, with its inclined part m2, into the path of the heel Z3 of the bar L, so as to then cause that bar in its rearward movement and as affected by the spring L and set-stop Z4, Fig. 1, to ascend the incline lnfand rest on the arm M, with the rack-bar K i`n proper position to guide the needle-bar and cause its needles to coact with the shuttles in simultaneously producing two rows of to-and-fro or zigzag stitches.
N', Figs. 1, 2, 3, and 4t, is a stop-screw on the arm N to regulate the extent of its downward movement in respect to the parts fn, 'n' on the feed-wheel.`
In the drawings, Figs. 22, 23, 24, 25, 30, 33, and 34:, and'Figs. 2G, 27, 2S, 29, 31, and 32 illustrate the formation of two opposite rows of zigzag stitches and barring-stitches connecting the ends of the two rows of zigzag stitches and composed of continuations of the four threads of the two rows of stitches as automatically produced by the above-described mechanism. These barring-stitches are made by said mechanism when the work-clamp moves step by step lengthwise and momentarily to and fro transversely, the same as when the two rows of zigzag stitches are beving made, and said barring-stitches are produced in consequence of the repeated to-andfro, semicircular, or approximately semicircular lateral movements of the two needles about their common axis, midway between them, such semicircular movements of the two needles being in one direction at one transverse movement of the work-clamp and in the opposite direction at the reverse transverse movement of the work-clamp, so that the needles coact with the different shuttles alternately-'in making these barring-stitches.
Figs. 23, 24, 25, 27, 28,29, 30, 3l, and 33 show long barring-stitches CZ', extending on the upper surface of the fabric Z entirely across the stitching of the buttonhole and formed from the thread CZ by the needle b and bound down at its middle by short stitches c', formed from the thread c by the needle a, and extending downward through the fabric and laterally in the form of loops c2, Figs. 30, 32, and 34, at both sides of the buttonhole, so as to thereby bar it, the tensions on the threads c, CZ, c, and f beingsuitably adjusted.
Figs. 3l and 32 illustrate the stitchings' on the upper and under surfaces of a buttonhole stitched by the above-described mechanism as its work-clamp is moved lengthwise in one direction, and Figs. 33 and 34 represent stitchings on the two surfaces of another buttonhole as stitched by the same machine when its work-clam p is moved lengthwise in the reverse direction.
Figs. 27, 28, 29, and 3i show each long barring-stitch CZ bound downat its middle by one short stitch c', as may be done by the above-described mechanism when the workclamp moves lengthwise in one direction, and Figs. 23, 24, 25, 30, and 33 show the long barring-stitches CZ bound down by one or two short stitches c, as may be done by the same mechanism when its work clamp moves lengthwise in the reverse direction. The action of the same mechanism as to binding down and not binding down the long barring- IOO IIO
IZO
stitches by short ones, may, can, or will be' somewhat diierent, according to the direction and length of the lengthwise steps of the workclamp, somewhat different positions and length of arc of the semicircular or approximately semicircular to-and-fro movements of the needles, and different adjustments of the tensions of the several threads of the stitching.
In using the above-described sewing-machine to automatically produce buttonholestitchings similar to those indicated by Figs. 3l, 32, 33, and 34 the feed-wheel F is first to be turned, as by hand, to bring the workclamp E to one end of its lengthwise movement, whereupon one of the cams-as n, for instance-of the stitch-controllingdevice will hold the arm N elevated, and the fabric to be stitched is secured in. the work-clamp. By then operating the sewing-machine it moves the work-clamp lengthwise in one direction,
and during that lengthwise movement of the Work-clamp the machine first makes barringstitches at one end of the buttonhole until by the turning of the feed-wheel the said cam n leaves and lets down the arm N, and then the i machine makes two rows of zigzag or two-andfro stitches Y Y' simultaneously along the two sides of the buttonhole until by the turning of the feed-wheel the other cam n elevates the arm N, and thereby causes the machine to make barring-stitches at the other end of the buttonhole until the work-clamp arrives at the end of its said lengthwise movement in one direction, whereupon the machine is to be stopped, while the arm N remains elevated by the cam n', and the stitched work is to be removed from the clamp and unstitched work secured therein. By then again operating the sewing-machine it moves the workclamp lengthwise in the reverse direction, and during such reverse movement of the workclamp the machine iirst makes barringstitches until the cam n' leaves and lets down the arm N, then makes two rows of zigzag or to-and-fro stitches simultaneously until the cam n elevates the arm N, and then makes barring-stitches until the work-clamp reaches the end of its said reverse lengthwise movement,whereupon the machine is to be stopped, the stitched work removed from the clamp, unstitched work secured therein, the machine again operated, and so on repeatedly. The sewing-machine can thus automatically stitch and bar a buttonhole by making, first, barring-stitches at one end of it, then two rows 'of zigzag or two-and-fro stitches simultaneously along its sides,and then barring-stitches at its other end while moving the work-clamp lengthwise a certain limited distance in one direction and can likewise stitch and bar another buttonhole while moving the workclamp the same distance lengthwise in the reverse direction.
In using this machine to automatically stitch and bar each one of a series ot buttonholes while the sewing-machine moves the work-clamp lengthwise in one direction only the feed-wheel is to be turned by hand through one-half of its revolution just after the stitching and barring of each buttonhole.
By having the stitch-changing mechanism controlled by only one long cam, as n or n', on
the feed-wheel, or by having only one such cam on that wheel, the sewing-machine will automatically stitch the two sides of a buttonhole simultaneously and bar only one end thereof while the machine moves the work clamp lengthwise in either direction. In such case the barring-stitches will be made irst when the work-clamp is being thus moved lengthwise in one direction and last when the workclam p is being moved in the reverse direction.
By having each of the two cams n n suitably short and properlyadjusted on the feed-wheel the machine will automatically stitch the two sides of a buttonhole simultaneouslyand bar one end only thereof while the machine moves the work-clamp in either direction lengthwise. By havingbut one such short cam on the feedwheel the machine will automatically stitch the two sides of a buttonhole simultaneously and bar one end of it only when the machine moves the work-clamp lengthwise in a certain one of two opposite directions.
The pinion F' revolves just twice to the wheel F once, so that instead of having two cams, as n n', on the wheel F one such cam on the pinion F can operate the arm N to control the action of the stitch-changing mechanism to produce barring-stitches, as hereinbefore described; and it is evident that instead of having such cam or cams in the form of a projection or projections the same can be in the form of a corresponding depression or depressions in a suitable ring on the pinion F' or wheel F, the standing arm M, Figs. l, 3, 4 and 13, being correspondingly adjusted on its anisl in relation to the heel Z3 of the bar L, as by set-screwsm. It is also obvious that the herein-described stitch-changing mechanism or any equivalent therefor to automatically cause a two-needle sewing-machine to temporarily make barring-stitches at one end or at the two ends of the formation of two rows of zigzag or to-and-fro stitches simultaneously can be controlled in its action by any suitable connection or connections with the wheel F, or pinion F', or ratchet-wheel R, or pitman E4, or slide E2, or arm E', or work-clamp E, or any equivalent for either of those parts, or any part which shall move in unison or in harmony with the lengthwise movements of the workclamp in whatever two-needle sewing-machine my broad invention shall be embodied.
To cause the above-described mechanism, which will normally make of a certain limited length two rows of zigzag or to-and-fro stitches simultaneously along the two sides of a buttonhole, to automatically make barringstitches at one end or at both ends of said Vtwo rowsof stitches without requiring any semicircular movements ofthe two needles, I provide means to automatically move the work-clamp or the two needles or the stitch- IOO IIO
forming devices to and fro transversely to the length ofjthe work-clam p a materially greater or different distance when the needles are making stitches at or near one end or either end of the lengthwise movement of the workclamp than when making the stitches of said two rows. As one means for this purpose I adjust the pivot-stud I so that it can be freely but closely slid upward and downward and held in fixed position when elevated and when depressed in the slots h2 and h3 of the vstandard A4 and lever H by means of an arm O, Figs. 3, 4, and 12, which has one end forked and embracing a iiattened sleeve o, Figs. 4 and 11, on the pivot-stud I and has the other end secured to a rock-shaft O,which is mounted in fixed bearings on the stationary plate A3 and has an attached arm P connected to the arm N by a slide-pivot p, and if the sewing-machine shall have means for semirotating the two needles, as above described, I adjust the arm M on its axis, as by set-screws m3, so that the arm will constantly support the heel Z3 of the slide-bar L, or I disconnect or leave off the means for semirotating the needles and fasten the sleeve c' to the needlebar. In such case the arm N when not elevated by the cam n or n will be depressed by the spring M' and will then through the arm P, rock-shaft O, and forked arm O retain the pivot-stud I in'proper depressed position, as indicated by full lines in Fig. 3, to cause the lever H to giveproper to-and-fro transverse movements to the work-clamp to produce the two rows of zigzag or to-and-fro stitches. When the arm N is elevated by the cam n or n', as in Fig. 4, that arm will then elevate and keep elevated the arms P and O, and thereby the pivot-stud I, as indicated by dotted lines at O2 and I in Fig. 4, so as to then cause the lever I-I to impart a greater length ot' to-and-fro transverse movement to the work-clamp to produce longer barringstitches, as indicated at the end parts of the buttonhole stitching represented in upper and under surface views by Figs. 35 and 36, wherein the barring stitches, which are formed from continuations of each of the two needle-threads c and d, extend in loop form across the central lengthwise line of the buttonhole on the upper and under surfaces of the fabric.
To cause the above-described mechanism to automatically stitch a buttonhole with barring-stitches,such as indicated by Figs. 37 and 38 in upper and under surface views, I have the above-described devices for temporarily imparting to the needles to-and-fro semicircular movements, and the above-described devices for temporarily increasing the length of the transverse to-and-fro movements of the Work-clamp both coact together simultaneously in making the barring-stitches at the beginning and the ending of the formation of the two rows of zigzag or to-and-fro stitches simultaneously along the sides of the buttonhole.
To cause the above-described mechanism Vto automatically stitch a buttonhole with barring-stitches about as represented in top view by Fig. 43, I have the devices for temporarily altering the length of the transverse to-andfro movements of the Work-clamp arranged and adjusted so as to cause the lever II to greatly lessen or stop the to-and-fro transverse movements of the work-clamp While the devices for se mirotating the needles are in action in making the barring-stitches.
The pivot stud or fulcrum I, Figs. 4 and ll, is shown formed with the head t', journalstem z", shoulders '52, iiattened stem 723, and screw-stem t4 and furnished with the sleeve o, washer 0, washer o2, and jam-nuts 03 04, by means of which the pivot-stud can be either clamped fast to the standard A4 at various heights or set to be slid closely upward and downward on that standard, as by the forked varm O, whose extent of movement can be varied by means of the adjustable pivot p, connecting the levers P and N, and the stopscrew N', above mentioned. If the pivot p be removed, the arm O will not act.
In case the barring-stitches shall be made by temporarily altering the length of the momentary to-and-fro transverse movements of the work-clamp, as above described, I generally prefer to have the work-clamp moved to and fro lengthwise from a feed wheel or device which is rotated step by step bythe sewing-machine Without using for that purpose the reciprocating slide from which momentary to-and-fro transverse movements are imparted to the work-clamp, examples being shown in the aforesaid patents, Nos. 362,771 and 303,453.
In making buttonhole-stitchings, such as are indicated by Figs. 3l and 32, or 33 and 34, or 35 and 3G, or 37 and 38, or43, by the abovedescribed mechanism its work-clamp is moved lengthwise step by step in making the barring-stitches, as well asin forming the two rows of zigzag stitches.
To render the mechanism capable of automaticall y stitching buttonholes with two rows of zigzag or to-and-fro stitches simultaneously and with barring-stitches bunched or close together at one end or at both Vends of the two rows of stitches, about as indicated by Figs. 39 and 40, 4l, 42, or 44, I furnish the mechanism with devices to automatically prevent, retard, lessen, or stop the lengthwise movement of the Work-clamp while the barring-stitches are heilig made. One device for this purpose consists of a lost-motion connection between the pitman E4 and the workclamp slide E2 or the feed-wheel F, one forml IOO tion when the arm N is elevated and its end part n2, Fig. 4, rests on the middle part of one of the cams n n', as when the 'stitching of a bnttonhole is just completed, the machine stopped, the stitched buttonhole removed from the clamp, and a buttonholeblank secured therein. When the machine is then operated, it will first make a bunch of barring-stitches, as X, Figs. 39 and 40, or X', Fig. 41, or X2, Fig. 42, or X3, Fig. 4A, while the crank-pin q turns from its place in Fig. 7 to its position in Fig. 8, and thereby moves the pitman until the pushing end of its long socket q2 is against the pin q', as in Fig. S, whereupon the cam will have just passed and let down the end 'n2 of the arm N and the barring device will be out of action. Then the machine will make two rows of zigzag stitches, as Y Y', while the crank-pin q moves from its position in Fig. 8 to its place in Fig. 9, and thereby moves the slide by the pitman to the end of its lengthwise movement in the direction of the arrow X', when the other one of the two cams will have just elevated the arm N, and thereby put in action the barring device, which will then cause the machine to make a bunch of barring-stitches, as X4, f5, or X6, Figs. 39 and 40, 41, or 42, at the other end of the two rows of stitches, while the slide E2 remains stationary and the crank-pin passes from its place in Fig. 9 to its place in Fig. l0, when the machine is to be stopped, with the arm N elevated and the pin q' midway in the socket q2, the stitched buttonhole removed from the clamp, and work to be stitched secured therein. By then operating the machine it will likewise stitch another buttonhole by making, first, at one end of it barring-stitches close together or bunched, thence two rows of zigzag stitches simultaneously along its sides, and then barring- Stitches bu nched or close together at its other end, all while Athe feed-wheel turns the crankpin q, and thereby moves the pitman E4 and the slide, with its pin g', from their places in Fig. lO to their positions in Fig. 7, whereupon the machine is to be stopped. Figs. 9 and 3 show the pitman furnished with a stop-screw g3 and jam-nut Q4, by which lost motion by the pin q in the long socket q2 can be reduced to different lengths or prevented, as may be desirable to bunch more or less or none of the barring-stitches.
' In using the above-described lnachinery to .automatically make buttonhole stitchings which have barring-stitches that are spaced about the same as the stitches in the two rows, as indicated in Figs. 31, 33, 35, and 37, no lost motion is allowed between the feedwheel and the slide which carries the workclamp, and the driving-pawlj constantly rcmains engaged with the teeth of the ratchetwheel R, as indicated in Fig. 16.
To render the mechanism capable of automatically making buttonhole-stitchings having barring-stitches bu nched or close together, about as indicated by Figs. 39,41, and 2,withont having` any temporary lost motion between the feed-wheel and the slide which carries the work-clamp, I commonly have apartially-toothed shield S, Fig. 20, applied to the ratchet-wheel R, about as shown by Figs. 12, 13, 14, 17, 1S, and 19, with the pin r on the ratchet-wheel extending into an opening or curved slot s in the shield and a headed screw s', having its shank extending through a perforation s2 in the shield and screwed securely into the supporting-stud r2, Fig. 14, for the ratchet-wheel, with a friction surface or disk between the shield and the head of the screw s' or the top of the studrg, so that` the ratchetwheel in turning forward may turn the shield forward only by Ithe pin r pressing against the forward end of the slot s, as shown in Fig. 17, and so that the shield can be teniporarily turned forward by ,the pawlj independently of the ratchet-wheel. The shield S has a few teeth s", which coincide with the teeth of the ratchet-wheel and are just between two projections S5 s, that have ratchetteeth entirely beyond the ratch et-wheel,which extends beyond the toothless partof the shield. This shield has its teeth s4, projections 35 s, and the forward end .s3 of its slot so arranged in relation to the pin i' of the ratchet-wheel, driving-.pawl j, the work-clamp, and intermediate operating connections that when the machine is stopped with the work-clamp at one end of its lengthwise movement and the middie part of a stitch-controlling cam, as n, elevating the end n2 ot the arm N the pawl j will then normally engage the teeth S4 of the shield and coinciding teeth of the ratchetwheel, as indicated in Figs. 13 and 18. By then securing in the clamp the work to be stitched and operating the machine it will first make barring-stitches close together or hunched, about as indicated at X, X', or X2 in Figs. 39, 41, and 42, while the pawlj leaves the teeth s4 and engages with the teeth of the projection s, as in Fig. 19, so as to then turn the shield, but not the ratchet-wheel, until that projection leaves the pawl in engagement with the ratchet-wheel only and the stitchcontrolling cam simultaneously stops the action of the barring devices. The machine will then make the two rows of zigzag stitches sim nltaneously, while the pawl j turns forward the ratchet-wheel step by step, and thereby the shield, after the pin fr has overtaken the advanced forward end s3 of the slot s and until the projection s6 meets the pawij and lifts it out of the ratchet-wheel, whereuponthe two rows of stitches will have been completed and a stitch-controller, as n', will have thrown the barring devices into action. Then the machine will make barringstitehes hunched or close together, about as indicated at X4, X5, or X6 in Figs. 39, 41, and 42, while the pawlj turns only the shield by IOO its projection s until the latter' passes forward of the pawl and leaves it engaged with the shield-teeth s4 and coinciding teeth ot' the ratchet-wheel, and the pawl has then turned the shield and ratchet-wheel together about one step, whereupon the work clamp will have completed its lengthwise movement in one direction, the stitching of the buttonhole will have been finished, and the machine is to he stopped. By then taking the stitched buttonhole out of the clamp, securing an unstitched buttonhole in the clamp, and again operating the machine it will in the same manner stitch the latter huttonhole by making, rst, barring-stitches close together at one end of it, thence two rows of zigzag or to-and-fro stitches simultaneously along its sides, and then barring-stitch es close together at its other end during the lengthwise movement of the work-clamp the same distance in the reverse direction.
The shield on the ratchet-wheel R of the feeding mechanism need have only one suitable toothed projection, as 35 or S6, when the machine shall be used to stitch a huttonhole with hunched barring-stitches at only one end of it and with spaced barring-stitches or no barring-stitches at its other end, or when the machine shall make hunched barringstitches at cach end of a buttonhole and the pawlj shall engage the middle part of such one-toothed projection when the machine is stopped at the completion of the stitching of a buttonhole at the end of each half-revolution of the feed-wheel.
Vhen the lost-motion device illustrated by Figs. 7, S, 9, and l0 shall be used in making hunched barring-stitches at one end only of a buttonhole, the making of such one bunch of stitches will use all proper lost motion hetween thc pivot-pin q' and the oblong socket q2 at one end of the lengthwise movement of the work-clamp in either direction, and the sewing-machine is to he stopped at the end of each half-revolution of the feed-wheel F, as the stitching of each buttonhole is completed either just as the pitman E4 ceases to move the work-clamp slide E2, as indicated in Fig. 9, or just when vthe pitman arrives in place to commence moving the work-clamp slide, as shown in Fig. S. In such case the machine can he used to stitch a buttonhole with hunched harringstitches at one end of it and with spaced barring-stitches or no barring-stitches at its other end, according as the machine shall be adjusted tomake harring-stitches at both ends or at only one end of a huttonhole.
To cause the machine to automatically stop when it completes the simultaneous stitching of the two sides of a huttonhole or completes the stitching of the two sides and one end or the two sides and both ends of a buttonhole, I combine in the sewing-machine any suitable stopping device or mechanism that will automatically release the driving mechanism from and apply a clutch or brake to the sewing-machine when its work-clamp is at the end of its lengthwise movementin one direction, or in either one of two opposite directions, or when the stitching of a but-tonhole is completed and the feed-wheel or device for moving-the work-clamp lengthwise a certain limited distance is in a certain predetermined part of its movement. As one means for this purpose the drawings show the shaft B, Fig. 2, with an attached balance-wheel Q, which has on its rear side a friction-surface against which fits a driving-pulley Q', which usually runs loose and free and which when properly pressed and held against the wheel Q will rotate it, and thereby operate the sewing-machine. U is a shipper-lever which has a fixed pivot-fulcrum at u', a lower arm u2 extending forward, a rear arm, with a finger U3 to press against a rear central bearing on the pulley Q, and a forward arm with a brake a4 to bear against the front face of the balance-wheel. U is a spring which constantly tends to press the lever U into its position indicated by broken lines in Fig. 2. Vis a lever which has as its fulcrum the shaft V', mounted in fixed supports, and has one arm o extending over a forward part of the arm u2 of the lever U and has another arm eX- tending upward and formed at its upper part as a catch c2. T is a trip-lever having a fixed pivot-fulcrum at t2, Figs. l2 and 13, and T, Fig. 3, is a spring which constantly tends to press andhold thelever Tin its place. (Shown in Figs. 5 and 12.) The feed-wheel F, which in Figs. 5 and 6 is indicated by a dotted circular line, has attached adjustablyto its under surface two trips, as t t', Figs. 3, Lt, 5, and 6, concentric and diametrically opposite, and the lever T has an inclined projection t3, which, as indicated in Figs. 5 and 6, is normally in the path of the two trips. When the machine is normally at rest, the spring` U will then hold the lever U with its brake a4 pressed against the wheel Q, as indicated by dotted lines in Fig. 2, and with the lever V disengaged from the lever T, as indicated in Fig. .thy full lines. To then operate t-he machine, the arm c', Fig. 4, of the lever V is depressed from its position in full lines in Fig. 4 to its lplace in full lines in Fig. 3, as by a person drawing down an attached rod or link o3, so as to thereby turn the lever U from its position in broken lines in Fig. 2 to its place in full lines in that iigure, and thus remove the brake uf from and press the driving-pulley Q' against the Wheel Q and compress the spring U and move the catch c2 of the lever V over the rear end part of the lever T, which will be retained under that catch by the spring T, as in Figs. 3, 5, and l2, and will then keep the levers V and U stationary and the machine in operation until the lever T shall be turned from under the catch n2, as in Figs. G and 13, whereupon the spring U will instantly turn the lever U, and thereby release the pulley Q' and apply the brake u? to the wheel Q, and
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thereby stop the machine. The trips t t are so adjusted on the feed-wheel F that when that wheel is turned in the stitching operation into either of the two positions it is in when the work-clamp is at the end of its lengthwise movement in either direction or the stitching of a buttonhole is completed one or the other of the two trips will have moved the lever T so that it will just then.
release the catch v2, as in Figs. 6 and 13. and consequently cause the automatic stopping of the machine, as above stated.
` When the shield S is used over the ratchetwheel R, as above described, the trips tt' are to be adjusted so as to cause the machine to stop when the pawl j is engaged with the shield-teeth s4, Figs. 13 and 18, and as the pawl then turns the ratchet-wheel a step at the completion of the stitching of a buttonholc. ln case there shall be lost motion between the pitman E1 and the pivot-pin q' on the work-clamp slide E2, as above described and illustrated by Figs. 7, S, 9, and 10, the trips t and t' are to be ordinarily adjusted to cause the machine to stop when the pin q' is at the middle of the oblong socket q2 in the pitman, as indicated in Figs. 7 and 10. As the pinion F' and ratchet-wheel R each has one complete revolution to the wheel F one-half of a rotation, one trip on the pinion orou the ratchetwheel or on any suitable part moving in unison therewith may serve instead ot' the two trips on the feed-wheel to coact with the lever T to stop the machine. Forinstance, one trip, as 154, Figs. 14 and 15, on the disk r', fast on the pinion F', may coact with an arm on the lever T (indicated in Fig. 13 by dotted lines at 155) about the same as the trip t or t' coacts with the part t3 on the lever T to stop the machine at the completion ot the stitching of a buttonhole.
The lever T is shown with a bent arm t6, so that a person can' thereby conveniently pull and turn that lever from under the catch Q22, and thus cause the machine to stop when the stitching of a bu ttonhole is completed or when the work-clamp is at either end of its lengthwise movements or wheneverit is desirable to stop the machine.
My invention is above described as applied to a two-needle sewing-machine in which the work-clamp is moved momentarily to and fro transversely to make thetwo opposite sets of to-and-fro stitches simultaneously. My invention is also applicable to any suitable twoneedle sewing-machine in which the two needles or the two needles and their complemental shuttles or loopers are moved momentarily to and fro transversely to the length of the work-clamp or direction of feed to produce the two opposite sets of tio-and-fro stitches.
When my invention is applied to a twoneedlevsewing-machine which does not reciprocate its work-clamp transversely to its length to make the to-and-fro stitches, the two needles are normally in a plane trans- 'above described.
Verse to the length of the work-clamp, or approximately so. In such case, when the two shuttles or loopers work parallel to the length ot the work-clamp, as shown in the aforesaid drawings, the machine will laterally reciprocate the two needles and the two shuttles or loopers transversely to the length of the workclamp to make the to-and-fro stitches; but the machine may laterally reciprocate the two needles only transversely to the length of the work-clamp to make the to-and-fro stitches when the shuttles or loopers work transversely to the length of the work-clamp and one shuttle or looper takes a loop from one needle only and the othershuttleor looper takes a loop from the other needle only at every descent of the two needles during their lateral reciprocating movements.
The drawings show the guides E3, Fig. 13, with a tongue g2 fitting between lengthwise guides g3 g4 on the slide G and adjustably fastened by set-screws g5, so that the guides are reciprocated by and with the slide, as Upon suitably loosening the screws g5 the guides E3 can be held stationary, as by a removable pin (indicated by dotted lines at g in Fig. 3) extending tightly through perforations in the part E3 and plate A3 and freely through alarge opening in the slide Gr, so that the latter will then be freely reciprocated by the lever H, while the workclamp slide E2 will be movedv step by step lengthwise to and fro, as above described, in its then stationary guides.
The vertically-reciprocating needle-bar C,
Fig. 1, can be mounted in a carrier vibrating or reciprocating horizontally on the head of the machine transversely to the length of the work-clamp, to thereby produce to-and-fro stitches essentially as in some well-known buttonhole-sewing machines, and in the machine represented by the drawings such a needle-bar carrier could be thus reciprocated by being connected with the reciprocating slide G, as by a rod, indicated by broken lines at G in Fig. 1. In such case the needle-bar carrier could or would carry the forward support Z of the bar L and have bearings for the forwardl parts of the connected bars L and K, so as toreciprocate these bars horizontally with the needle-bar in making the to-and-fro stitches and permit the bar L to be temporarily connected with and reciproca-ted a longer strokeA by the lever l-l to cause the semirotations to and fro of the needle-bar in making barring-stitches, as hereinbei'ore described. Also the two shuttle-races D2 D3, holding the two shuttles D D', can be mounted in suit-able guides and,horizontally reciprocated transversely to the length of the work-clamp, as by being connected to the reciprocating slide Gr by a rod or bar (indicated by broken lines at G2 in Fig.` 1) and extending through suitable apertures in the plates under the slide G, so that the shuttles would be reciprocated with the needles transversely to the length of the work-clamp in making IIO the two rows of zigzag stitches and the barring-stitches.
My invention, as shown by the aforesaid drawings and above described, is illustrated as applied to a sewing-machine in which the Work-clamp is moved lengthwise a certain limited distance by the machine to feed the work to the stitch-forming devices, as I commonly prefer; but in carrying out my invention t-he work-clamp may not have any lengthwise movement and the sewing-machine may move the stitch-forming mechanism step by step a certain limited distance lengthwise of the work-clamp to feed the stitch-forming devices to the work-for instance, as indicated by broken lines in Figs. 2 and 3, by having ways A'fast to the under side of the bed A and parallel to the lengthwise direction of the work-clamp and fitting coinciding ways WV, fast on a suitable stationary supporting-frame WV', having a bracket f2 fast on said frame and extending upward through a suitable opening in the bed A and fitting against the two opposite side edges of the arm E of the work-clamp, and by then rotating the shaft B the machine will operate as hereinbefore described, except that the work-clamp will not be moved lengthwise and the bed A with the stitch forming and feeding mechanisms will be moved step by step a certain limited distance lengthwise of the work-clamp to and fro, and While the machine is thus moving the stitch-forming mechanism lengthwise of the work-clamp a certain limited distance in one direction the machine will automatically stitch a buttonhole by making, first, barring stitches at one end of it, then simultaneously two rows of zigzag or to-and-fro stitches along its sides, and, next, barring-stitches at its other end, and will thereupon automatically stop.
The aforesaid drawings show my invention applied to a two-needle sewing-machine which will normally make two separate opposite rows of lock, zigzag, or to-and-fro stitches simultaneously. My invention is likewise applicable to any suitable two-needle sewingmachine which will make simultaneously two separate opposite rows of chain, to-and-fro, or zigzag stitches.
I have been informed that prior to my invention a two-needle sewing-machine provided with a single shuttle had been contrived to make two separate opposite rows of zigzag or to-and-fro stitches simultaneously. I therefore do not claim such a two-needle sewingmachine broadly.
I wish to cover all equivalents of two shuttles coperating with two needles, and for this purpose I will adopt in my claims the phrase two needles and two sets of complemental parts.
What I claim as my invention, and desire to secure by Letters Patent, is-
l. The combination, substantially as described, with a stitch-forming mechanism comprising two needles and two sets of complemental parts, of a work-support and mechanism for producing between said stitch-forming mechanism and work-support, one relative feeding and jogging movement suitable for forming two independent rows of stitches for the sides of a buttonhole, and another relative movement for forming barring-stitches at each end of the aforesaid two rows-of stitches extending across the liuc of the buttonhole.
2.- The combination, substantially as described, with stitch-forming mechanism coinprising two needles and two sets of complemental parts, of a work-support and mechanism for producing between said stitch-forming mechanism and work-support, one relative movement suitable for forming barringstitches at one end of a buttonhole across the middle line of the latter, subsequently another relative movement suitable for forming two independent rows of stitches for the sides of abuttonhole, and finally another relative movement for forming similar barringstitches at the other end of the buttonhole, all three sets of stitches being produced bya single movement lengthwise of the buttonhole.
3. The combination, substantially as described, with stitch-forming mechanism comprising two needles and two sets of complemental parts, of a Work-support, mechanism for producing between said stitch-forming mechanism and work-support, one relative movement suitable for forming barring` stitches at one end of a buttonhole across the middle line of the latter, subsequently another relative movement suitable for forming two independent rows of stitches for the sides of a buttonhole, and finally another relative movement for forming similar barringstitches at the other end of the buttonhole, and an automatic stop mechanism for terminating the stitching operation after the completion of the second set of barring-stitches.
4. The combination, substantially as described, with stitch-forming mechanism comprising two needles and two sets of complemental parts, of a work-support, mechanism for producing between the said stitch-forming mechanism and work-support, one relative movement for forming a set of barringstitches at one end of a buttonhole, another relative movement for forming two rows of stitches for the sides of a buttonhole, another relative movement suitable for forming a set of barring-stitches at the other end of the buttonhole, and for repeating these operations for a second buttonhole, and a stop mechanism for stopping the operation of the said mechanisms after the completion of each buttonhole.
5. The combination, substantially as described, with stitch-forming mechanism comprising two needles and two sets of complemental parts, of a work-support, and mechanism for producing between the said stitchforming mechanism and work-support, a relative jogging movement onlyfor formingasct ot' barring-stitches for one end of a button- IOO IIO
hole across the middle -line of the latter, a relative jogging and feeding movement for forming two rows of stitches for the sides of the buttonhole, and a relative jogging movement only forforming a set of similar barringstitches at the second end of the buttonhole.
6. The combination, substantially as described, of stitch-formin g mechanism comprising two needles and two sets of complemental parts, of a work-support, mechanism for producing between the said stitch-forming mechanism and work-support a relative jogging movement only for forming a set of barring-stitches for one end of a buttonhole, extending across the line of the latter, arelative jogging and feeding movement for forming two rows of stitches for the sides of the buttonhole, and a relative jogging movement only for forming a set of similar barringstitches at the second end of the buttonhole, and a stop mechanism for stopping the operation of the aforesaid mechanisms after the completion of each buttonhole, substantially as specified.
7. The combination, substantially as described, With stitch-forming mechanism comprising two needles and two sets of complemental parts, of a work-support and mechanism for producing between the said stitchforming mechanism and work-support,a relative jogging movement only for forming a set of barring-stitches for one end of a buttonlhole, a relative jogging and feeding movefor producing between said stitch-forming mechanism and work-support, one relative movement suitable for forming barring- 'stitches at one end of a buttonholeacross the vmiddle line of the latter, subsequently another relative movement suitable for forming two independent rows of stitches for the sides vof a buttonhole, and finally another relative movement for forming similar barringstitches at the other end of the buttonhole,
'and means for causing a relative swinging movement between the needles during the forming of the barring-stitches, substantially as specified.
9. The combination, substantially as described, with stitch-forming mechanism comlprising two needles and two sets of complelmental parts, of a work-support, mechanism 'for producing between said stitch-forming mechanism and work-support, a relative feed- 'ing and jogging movement suitable for form- `ing two independent rows of stitches for the sides of a buttonhole, a stitch-regulating mechanism which normally acts momentarily to and fro a certain distance transversely to the length of the work-support, and a stitchchanging mechanism which will automatically alter the extent of action of said stitchregulating mechanism during the formation of the barring'- stitches, and simultaneously cause a relative swinging movement between the needles.
lO. The combination, substantially as described, with stitch-forming mechanism comprising two needles and two sets of complemental parts, of a work-support, mechanism for producing between said stitch-forming mechanism and work-su pport, a relative feeding and jogging movement suitable for forming two independent rows of stitches for the sides of a buttonhole, a stitch-regulating mechanism which normally acts momentarily to and fro a certain distance transversely to the length of the work-support, and a stitchchanging mechanism which will automatically alter the extent of action of said stitchregulating mechanism during the formation of the barring-stitches.
ll. The combination, substantially as described, with stitch-forming mechanism comprising two needles and two sets of complemental parts, of a work-support, mechanism for producing between said stitch-forming mechanism and work-support, arelative feeding and jogging movement suitable for forming two independent rows of stitches for the sides of a buttonhole, a driving mechanism, a normally-inactive stitch-changing mechanism which when in action will cause the sewing machine to make barring stitches, a stitch-controller, or cam, moving in harmony with said mechanism producing a relative feeding and jogging movement between said stitch-forming mechanism and said support, and a connectionbetween said stitch-controller or cam and said stitch-changing mechanism whereby the stitch-changing mechanism is temporarily caused to be engaged with, actuated by, and disengaged from, said driving mechanism.
l2. The combination, substantially as dcscribed, with stitch-forming mechanism comprising two needles and two sets of complemental parts, of a work-support, mechanism for producing between said stitch-forming mechanism and work-support a relative feeding and jogging movement suitable for forming two independent rows of stitches for the sides of a buttonhole, a normally-inactive stitch-changing mechanism which when in action will cause a relative swinging movement between the needles to make barringstitches, a driving device for said stitchchanging mechanism, a stitch-controller moving in harmony with said feed mechanism, and a connection between said stitch-controller and said stitch-changing mechanism, whereby the latter is temporarily caused to be engaged with, actuated by and disengaged from said driving device.
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13. The combination, substantially as described, with stitch-forming mechanism comprising two needles and two sets of complemental parts, of a work-support, mechanism for producing between said stitch -forming mechanism and work-support, a relative feeding and jogging movement suitable for forming two independent rows of stitches for the sides of a buttonhole and the necessary movement for forming barring-stitches,a normallyinactive stitch changing mechanism which when in action will cause a relative swinging movement between the needles to make barring-stitches, a vibrating lever, a stitch-controller moving in harmony with the relative movement of the work-clamp and stitch-forming mechanism,and a connection between said stitch-controller and said stitch-changing mechanism whereby the latter is temporarily caused to be engaged with, actuated by, and disengaged from said vibrating lever.
14. The combination, substantially as described, with stitch-forming mechanism comprising twov needles and two sets of complemental parts, of a work-support, mechanism for producing between said stitch-forming mechanism and work-support, arelative feeding and jogging movement suitable for forming two independent rows of stitches for the sides of a buttonhole, a ratchet-wheel, its driVing-pawl, a connection between the ratchet-wheel and the work-clam p to feed the latter lengthwise a certain distance, a shield pivoted relatively to the ratchet-wheel and having a toothed projection extending beyond the ratchet-wheel, and a lost-motion connection between the ratchet-wheel and shield, whereby the driving-pawl will turn the ratchet-wheel while the sewing-machine makes the two rows of side stitches, and will turn only the shield when the barring-stitches are being made.
15. The combination, substantially as described, with stitch-forming mechanism comprising two needles and two sets of complemental parts, of a work-support, mechanism for producing between said stitch-forming mechanism and work-support, arelative feeding and jogging movement suitable for forming two independent rows of stitches for the sides of a buttonhole, a ratchet-wheel, its driving-pawl, a connection between the ratchet-wheel and work-clamp to feed the latter lengthwise a certain distance, a rotary shield concentric with the ratchet-wheel and having two toothed projections somewhat apart and extending beyond the ratchetwheel and intermediate teeth coinciding with teeth of the ratchet-wheel, alost-motion connection between the ratchet-wheel and shield, and a mechanism which will automatically stop the sewing-machine when said drivingpawl is engaged with the shield between said two projections.
In testimony whereof I hereunto set my hand, in the presence of two subscribing witnesses, this 13th day of October, 1892.
JAMES T. HOGAN.
Witnesses:
N. O. TEMPLETON, THo. QUIsT.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US44912192A US648618A (en) | 1892-10-17 | 1892-10-17 | Buttonhole-sewing machine. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US44912192A US648618A (en) | 1892-10-17 | 1892-10-17 | Buttonhole-sewing machine. |
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US648618A true US648618A (en) | 1900-05-01 |
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ID=2717190
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Application Number | Title | Priority Date | Filing Date |
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US44912192A Expired - Lifetime US648618A (en) | 1892-10-17 | 1892-10-17 | Buttonhole-sewing machine. |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070127179A1 (en) * | 2005-12-05 | 2007-06-07 | Ludjin William R | Burnout protection switch |
-
1892
- 1892-10-17 US US44912192A patent/US648618A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070127179A1 (en) * | 2005-12-05 | 2007-06-07 | Ludjin William R | Burnout protection switch |
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