US374837A - Button-hole attachment for sewing-machines - Google Patents

Button-hole attachment for sewing-machines Download PDF

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US374837A
US374837A US374837DA US374837A US 374837 A US374837 A US 374837A US 374837D A US374837D A US 374837DA US 374837 A US374837 A US 374837A
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dog
disk
plate
button
hole
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    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B3/00Sewing 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
    • D05B3/24Sewing 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 formed by general-purpose sewing machines modified by attachments, e.g. by detachable devices

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  • FIG. 1 atop view of the same, the parts in the position seen in Fig. 1; Fig. 4, a transverse vertical section through the crank-disk, feed, &c.; Fig.' 5, an inside view of'the disk G detached, showing the band 4 with the dog hung upon the plate 5; Fig.6, anoutside View of the disk G, the plate 5 and the band 4 removed, showing the check or stop band Q, with its actuatingdog; Fig. 7, an under side view of the attachment; Fig. 8, an under side view of the base,
  • Fig. 8 a top view of the base, showing the shifter t and the bell-crank lever 33 34; Fig. 9, a longitudinal central section through the dog and shifter; Fig. 10, a detached view illustrating the op- 0 eration of the feeddog; Fig. 11, a detached view showing the slide 25 and its actuatingcam; Fig. 12, a top view of the universally adjustable work-plate; Fig. 13, an under side view of the same; Fig. 14, a longitudinal sec- 5 tion through the work-plate on the line of the needle-hole, showing side view of the shuttlecover; Fig. 15, a transverse section through the work-plate and shuttle-cover on line a z of Fig. 12.
  • This invention relates to an improvementin that class of button-hole attachments for sewing-machines which are adapted to be applied to the resser-foot bar of the machine, and which are actuated through a lever hung upon the attachment and extending into connection with the needle-bar, so that the up-and-down reciprocating movement of the needlebar imparts vibratory movement to the said lever, and this vibratory movement of the said lever imparts the required movement to the respective parts of the attachment, and is an I improvement upon the attachment for which I filed an application for Letters Patentof the United States December 13, 1886, Serial No. 221,405, the inventionrelating more particu- 5 5 larly to the feeding mechanism.
  • A represents the base, upon the upper side of which is a socket, B, adapted for attach: ment to the presser-foot bar, and to which it may be secured by a screw, C, or otherwise, and so that the attachment may partake of the up-and-down movement of the presser' foot bar.
  • an upright, D (see Figs. 3 and 4,) which is in the form of a flat plate, the plane of which is longitudinally of the attachment.
  • a disk, E On one side of this upright is a disk, E, the hub F of which extends through the upright.
  • the disk, ho'wever takes a bearing upon its side of the upright.
  • a 7g concentric disk, G made fast to the hub F of the disk E, and so that the disk G forms a bearing against its side of the upright, but
  • the actuating-lever J is hung loosely. It extends from the hub and terminates at its free end in a fork, K, (see Fig.1,) which is adapted to engage the needle-bar in the usual manner for this class of sewing-machine attachments, 8c and so that the up-and-down reciprocating movement of the needle-bar will impart cor-. responding vibratory movement to the lever J.
  • the plate 0 is constructed with an opening
  • this opening being some what larger than the maximum size of buttonhole to be wrought.
  • a roughened or equivalent surface adapted to engage the fabric in which the button-hole is to be wrought.
  • the plate 0 being hung to the base and the base to the resser-foot, when the presser-foot is raised the plate 0 will rise with it, so as to leave space between it and the cloth-plate for l the introduction of the work and the proper presentation of the button-hole to the plate 0, and so that when the pressenfoot is dropped in the usual manner the opening R in the plate 0 will surround the button-hole and hold i it in its proper relation thereto.
  • the movement of the work-holder or plate 0 is substantially the same as in other workholders in button-hole attachments-that is to say, it receives a lateral vibratory movement to permit the needle to first descend through the work upon the inner edge of the buttonhole, and then in-the next stitch to take onto the material outside the button-hole, and so continuing. It also receives an advance movement or feed for each stitch until the end of the button-hole is reached. Then the holder is thrown to the opposite side and returned by the step-by-step feed to stitch the opposite side of the button-hole.
  • the plate O is constructed with alongitudinal slot, W, which works upon a stud, V, projecting downwardly through the base A, and so that it may vibrate thereon in a horizontal plane, and at the same time may move longitudinally back and forth.
  • the vibratory or transverse back-and-forth movement is imparted to the workholder from the bell crank lever J.
  • the arm L of the said bell-crank lever is connected to a longitndinally-guided slide,'a, (see Fig. 1,) and so that the vibratory movement of the lever imparts acorresponding reciprocating movement to the slide a.
  • This slide extends rearward, and at its rear end is an inwardextension, b, in a horizontal plane, and through this extension bis a vertical stud, d, (see Fig.
  • the stud d carries a dog, f, which extends to the rear, as seen in Fig. 2, and so as to swing freely in a horizontal plane.
  • the free end of the dog terminates in two arms, g h.
  • the said dog being hung to the stud d and that stud movable with the slide a, it follows that the dog will partake of the reciprocating movement of the slide; but the dog is free to swing to the right or left in a horizontal plane, as indicated by broken lines in Fig. 3.
  • the ends of the arms g h of the dog f turn down, one on the right-hand side and the other on the left-hand side of the shifter i, and so that as the dog swings upon its pivot the shifter below stands in the path of the downward projections from the arms of the dog.
  • the shifter t is constructed with a shoulder, at, upon one side of its pivot, and with a like shoulder, 02, upon the opposite side of its pivot. (See Fig. 8.)
  • the arms g h of the dog through the downward projections therefrom are adapted to respectively engage the said shoulders at n, accordingly as they may be presented thereto. These shoulders m n are substantially opposite each other.
  • the rear or free end of the shifter is constructed with a finger, 0, on the same side as the shoulder m, and which finger projects to the left, and upon the opposite side the shifter is constructed with a like finger, T, which projects to the right.
  • the turned-down ends of the arms 9 h work between the respective shoulders and corresponding fingers of the shifter, it being understood that the friction of the shifter on its bearing is sufiicient to resist the tendency of the dog to impart shifting movement thereto as the dog re treats, the friction of the dog upon its bearing being less than that of the shifter, so that the dog operates the shifter only as it engages its respective shoulders in the advance movement.
  • the feed to advance the work between successive stitches is produced by the actuating-lever J.
  • the disk G is the feed-disk, and, as before stated, is substantially a part of the disk E, so that the disk E may partake of the intermittent or step-by-step rotative movement imparted to the disk G.
  • aplate, 5, (seeFig.4,)which servesto retain the frictional band 4 on the disk G.
  • the plate 5 forms a lever by which the band 4 is operated.
  • the band 4 is an elastic divided ring, one end terminating in a shoulder, 6, and the other end in a corresponding shoulder, 7, (see Fig. 5,) one overlapping or extending beyond the other, the division in the ring permitting it tobe contracted close upon the surface of the disk G, or, when free, by its own elasticity to release the disk G.
  • From the plate 5 is a radial projection, 8, on which a dog, 9, is hung upon a pivot, 10, the said dog being upon the same side of theplate as the frictional band 4. This dog hangs free upon its pivot, but-extends around the shoulder 7 and projects between the two shoulders 6 and 7 of the frictional band 4.
  • the operation is to turn the pivot upon which the dog is hung downward.
  • the dog acts as a 1e: ver, the bearing of its nose upon the shoulder 7 of the band being the fulcrum, and the bear v ing ofthe nose upon the shoulder 6 being the weight, while the pivot is the power.
  • the dog turns upon its fulcrum or shoulder 7 and raises the shoulder 6, and thereby contracts the band upon the disk G, so as to firmly engage. there the lever J.
  • the disk G forms substantially a part of the disk E, so that the disk E must partake of the intermittent or step-by-step rotative movement of the said disk G.
  • a slide, 16 is arranged in longitudinal guides 17 parallel with the face of the disk E.
  • crank-pin is made adjustable in a radial slot, 20, in the disk E in theusual nianner for making adjustable crank-pins. From be to begin at one end of a button-hole'with the slide 16 a stud, 21, extends down through a longitudinal slot, 22, in the base A, as seen in Fig. 8, and so as to work into a corresponding transverse slot, 23, in the plate 0, as seen in Fig.
  • the longest diameter being substantially parallel with the slot in the disk E, or so that the longer diameter of the cam M will be presented to the nose 14 of the dog 2 on the deadeenters.
  • the dog will be brought into action upon the stud 11 earlier than it will be on the shorter, diameter, and the time of action of the dog will be proportionately increased, so that as the disk E is passing the dead-centers the feed produced by the dog will be longer than when on the smaller diameter, and the feed will gradually diminish toward such smaller diameter, then increase toward the opposite point of thelonger diameter.
  • This cam therefore compensates for the variation in the length of steps produced by the crank-like action of the disk, and the stitches will be of equal length throughout the button-hole.
  • a checking device substantially like the band 4, as seen in Fig. 6.
  • This consists of a band, Q, like the band 4, and which is placed besideit upon the periph cry of the disk G, as seen in Fig. 4, and, like the band 4, it is divided, one end terminating in a hook-like shoulder, It, and the other in a shoulder, S, corresponding to the shoulders 6 7 of the band 4, the one shoulder overlapping the other in the same manner.
  • a dog, T is hung upon a pivot, t, its nose u standing between the two shoulders R and S in like manner as does the nose of the dog 9 of the band 4.
  • the arrow in Fig. 6 indicates the revolution of the disk, as does the arrow in Fig. 5, the directions being the same.
  • the dog leaves the band Q free and open, so that the feed-disk G may rotate freely in the advance direction; but instantly upon the return of the disk G thefriction between it and the band Q inclines the band to turn with it, and in so doing the dog is turned upward on its pivot and acts as a lever between the two shoulders R S to force those shoulders asunder, and contracts the ring to so firm a bearing upon the disk that its return is prevented.
  • Both the dog T of this stop or checking mechanism and the dog 9 of the feeding mechanism may be provided with springs which will hold them in their normal position, as shown; but the springs are not necessary.
  • a cam, 24, is formed upon the hub F of the disk E, or made as a part of the disk, as indicated in Fig. 4, this cam being clearly seen in Fig.
  • the cam 24 is in four divisions, as seen in Fig. 11. From the point 28 to the point 29 represents one side of the button-hole, and is the greatest projection of the cam and concentric with its axis.
  • the cam gradually contracts, and this contracted portion occurs at one end of the button-hole; then from 30 to 31 is concentric with the axis and is ofthe smallest diameter and of substantially the same extent as from 28 to 29, corresponding to the other side of the button-hole; then from 31 to 28 is a rise in the IlO cam, like the fall off from 29 to 30, and corresponds to the opposite end of the button-hole.
  • a bellcrank lever is hung upon a fulcrum, 32.
  • One arm, 33, of this lever extends longitudinally beneath the slide 25.
  • Theother arm,34,of this lever extends outward at right angles, and from the slide 25 an arm, 35, extends outward over the arm 34.
  • the arms 34 and 35 are connected by an adjustable screw-pivot, 36, working in slots in the respective arms, and so that the reciprocating movement of the slide 25,imparted by the cam 24, as before described,will impart a corresponding transverse vibratory movement to the arm '33, as indicated in broken lines, Fig. 8.
  • the cam 24 working accordingly, brings one of its extreme points say 29 to one arm of the slide and the opposite point, 31, to the other arm of the slide. Then the slide commences itsreciprocating movement under the corresponding. rise and fall of the cam until the opposite points,30 and 2S,are reached,and during themovement of the slide 25 under the rise and fall of the cam the lever'arm 33 is turned to one side and cone spondingly throws the work-holder.
  • the stop 15 is made adj ustable,so as to bring the dog2 sooner or later into contact with it, and to make it so adjustable the stop is in the form of a cam, so that by rotating the cam it will present a portion of its surface sooner or later to the dog, accordingly as it is turned to bring its varying extent into the path of the. dog.
  • the length of the button-hole will be varied by adjusting the crank-pin 18 in theslot 20,to bring it nearer to or take-it farther from the axis of revolution of the disk E.
  • This plate is made from thin flatsheet metal, and is constructed with a needleopening, 39, corresponding to the usual needle-hole of a sewing-machine work-plate.
  • 40 represents the usual shuttle-race cover.
  • the work-plate 38 is hung to this cover by two studs, 41 and 42. These studs are made fast in the work-plate 38 and extend through corresponding holes in the plate 40; but the studs are considerably longer than the thickness of the plate 40 and headed beneath the plate 40, as seen in Figs. 14 and 15, so that the plate 38 is prevented from separation from the plate 40, and when the plate 40 is in place the plate 38 stands in its proper position with relation to the needle-hole and beneath the work-holder.
  • a downward tubular projection,43 which takes a bearing on the work plate below around its needle-hole as a pivot on which the plate 38 may oscillate.
  • the studs 41 and 42 leave the plate 38 free to thus oscillate upon its pivot 43, but yet hold it always in the same. relation to the needle-hole, and thus anniversal rocking movement is permitted to the cepting in combination as hereinafter speci- I claim 1.
  • a button-hole attachment substantially such as described, the combination of the feed-disk G, the actuating-lever adapted to swing under the reciprocating.
  • a button hole attachment substantially such as described, having a cloth holder and feeding mechanism, the combination thereto engage said disk and plate in one direction and leave said disk free in the opposite direction, the said plate provided with the stud 11, the dog 2, hung upon the said actuating-lever, the cam M, fixed to the axis of said feed-disk, the said dog constructed with an arm, 12, upon oneside to engage the stud 11, and with anose,
  • the said dog constructed with an arm, 12, upon one side to engage the stud 11, and with a nose, 14, upon the opposite side to engage said cam, an adjustable stop, 15, on the said plate '5 and above said dog, substantially as and for the purpose specified.
  • a button-hole attachment for sewingmachines the combination therewith of a work-plate, 38, constructed with a needle-hole, 39, and with a tubular pivot, 43, around said needle-hole upon the under side of the plate, with the shuttle-race cover 40, the said plate loosely hung to said cover, substantially as described, and so as to permit universal oscillation of said work-plate, substantially as described.

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Description

(No Model.)
3 Sheets-Sheet 1.
W. JOHNSON.- v BUTTON HOLE ATTACHMENT FOR SEWING MACHINES.
Patented Dec. 13,1887.
' 41w-e7l2 W N. PETERS. Phmo'ulhegnpiur. Wmhinglon. D. B.
(No Model.) I w .3 SheetS-Sheet 2.-
A. W. JOHNSON; v BUTTON HOLE ATTACHMENT FOR SEWING MACHINES.
' r 3 Sheets-Sheet 3. A. W. JOHNSON.
BUTTON HOLE ATTACHMENT FOR SEWING MACHINES. No. 374,837.
(No Model.)
'atented Dec. 13
umzns. mwum n mnwmin tmnc Nrrnn "rATEs ATENT Enron.
ALBERT \V. JOHNSON, OF NEWV HAVEN, ASSIGNOR TO THE PEERLESS'BUTTON HOLE ATTACHMENT COMPANY, OF TYLER CITY, CONNECTICUT.
BUTTON-HOLE ATTACHMENT FOR SEWING-MACHINES.
SPECIFICATION forming part of Letters Patent No. 374,837, dated December 13, 1887. Application filed July 18, 1887. Serial No. 244,576. (No model.) i
To ctZZ whom it may concern.-
Be it known that LALBERT W. J OHNSON, of New Haven, in the county of New Haven and State of Connecticut, have invented anew Improvement in Button-Hole Attachments for Sewing-Machines; and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full,clear,
and exact description of the same, and which said drawings constitute part of this specification, and represent, in
Figure 1, aside View looking from the right; Fig. 2, a side view looking from the left; Fig.3,
1 5 atop view of the same, the parts in the position seen in Fig. 1; Fig. 4, a transverse vertical section through the crank-disk, feed, &c.; Fig.' 5, an inside view of'the disk G detached, showing the band 4 with the dog hung upon the plate 5; Fig.6, anoutside View of the disk G, the plate 5 and the band 4 removed, showing the check or stop band Q, with its actuatingdog; Fig. 7, an under side view of the attachment; Fig. 8, an under side view of the base,
the work holder removed 5 Fig. 8, a top view of the base, showing the shifter t and the bell-crank lever 33 34; Fig. 9, a longitudinal central section through the dog and shifter; Fig. 10, a detached view illustrating the op- 0 eration of the feeddog; Fig. 11, a detached view showing the slide 25 and its actuatingcam; Fig. 12, a top view of the universally adjustable work-plate; Fig. 13, an under side view of the same; Fig. 14, a longitudinal sec- 5 tion through the work-plate on the line of the needle-hole, showing side view of the shuttlecover; Fig. 15, a transverse section through the work-plate and shuttle-cover on line a z of Fig. 12.
0 This invention relates to an improvementin that class of button-hole attachments for sewing-machines which are adapted to be applied to the resser-foot bar of the machine, and which are actuated through a lever hung upon the attachment and extending into connection with the needle-bar, so that the up-and-down reciprocating movement of the needlebar imparts vibratory movement to the said lever, and this vibratory movement of the said lever imparts the required movement to the respective parts of the attachment, and is an I improvement upon the attachment for which I filed an application for Letters Patentof the United States December 13, 1886, Serial No. 221,405, the inventionrelating more particu- 5 5 larly to the feeding mechanism.
A represents the base, upon the upper side of which is a socket, B, adapted for attach: ment to the presser-foot bar, and to which it may be secured by a screw, C, or otherwise, and so that the attachment may partake of the up-and-down movement of the presser' foot bar. On thebase is an upright, D, (see Figs. 3 and 4,) which is in the form of a flat plate, the plane of which is longitudinally of the attachment. On one side of this upright is a disk, E, the hub F of which extends through the upright. The disk, ho'wever, takes a bearing upon its side of the upright. Upon the opposite side of the upright is a 7g concentric disk, G, made fast to the hub F of the disk E, and so that the disk G forms a bearing against its side of the upright, but
so as to permit the free revolution of the disks E and G. Upon the extension H of the hub 7 the actuating-lever J is hung loosely. It extends from the hub and terminates at its free end in a fork, K, (see Fig.1,) which is adapted to engage the needle-bar in the usual manner for this class of sewing-machine attachments, 8c and so that the up-and-down reciprocating movement of the needle-bar will impart cor-. responding vibratory movement to the lever J.
From the lever J an arm, L, extends downward, forming what in this class of attachments is commonly calleda bell-crank lever. Outside the lever and onto the hub a collar, M, is applied, which also forms a cam, as hereinafter described. Through this collar a 9c set-screw, N, is introduced, screwed into the hub F H, as seen in Fig. 4, and so as to bind the cam-collar firmly against the hub, but so as to leave the lever J free to vibrate independent of the disks E and G. Beneath the base the work-holding clamp is arranged. This consists ofa plate, 0, (see Fig-7,) hung upon the under side of the base, and so asto be free for longitudinal and transverse movement, as hereinafter described. n
The plate 0 is constructed with an opening,
R, at the needle end, this opening being some what larger than the maximum size of buttonhole to be wrought. Around the edge of the opening is a roughened or equivalent surface adapted to engage the fabric in which the button-hole is to be wrought.
The plate 0 being hung to the base and the base to the resser-foot, when the presser-foot is raised the plate 0 will rise with it, so as to leave space between it and the cloth-plate for l the introduction of the work and the proper presentation of the button-hole to the plate 0, and so that when the pressenfoot is dropped in the usual manner the opening R in the plate 0 will surround the button-hole and hold i it in its proper relation thereto.
The movement of the work-holder or plate 0 is substantially the same as in other workholders in button-hole attachments-that is to say, it receives a lateral vibratory movement to permit the needle to first descend through the work upon the inner edge of the buttonhole, and then in-the next stitch to take onto the material outside the button-hole, and so continuing. It also receives an advance movement or feed for each stitch until the end of the button-hole is reached. Then the holder is thrown to the opposite side and returned by the step-by-step feed to stitch the opposite side of the button-hole.
i The plate Ois constructed with alongitudinal slot, W, which works upon a stud, V, projecting downwardly through the base A, and so that it may vibrate thereon in a horizontal plane, and at the same time may move longitudinally back and forth.
The vibratory or transverse back-and-forth movement is imparted to the workholder from the bell crank lever J. The arm L of the said bell-crank lever is connected to a longitndinally-guided slide,'a, (see Fig. 1,) and so that the vibratory movement of the lever imparts acorresponding reciprocating movement to the slide a. This slide extends rearward, and at its rear end is an inwardextension, b, in a horizontal plane, and through this extension bis a vertical stud, d, (see Fig. 9,) which is adjustable in a longitudinal slot in the extension b, and is made so adjustable by an'adjusting-screw, e, the adjusting screw being fixed in the extension I) as to movement in an axial direction, but free to revolve. The screw works through the head of the stud d, and so that by turning the screw the stud will be moved backward or forward, according to the direction in which the screw is turned.
The stud d carries a dog, f, which extends to the rear, as seen in Fig. 2, and so as to swing freely in a horizontal plane. The free end of the dog terminates in two arms, g h. The said dog being hung to the stud d and that stud movable with the slide a, it follows that the dog will partake of the reciprocating movement of the slide; but the dog is free to swing to the right or left in a horizontal plane, as indicated by broken lines in Fig. 3.
On the base A and beneath the dog f the shifter t is hung upon a pivot, Z, (see Fig. 8%)
and so as to swing thereon in a plane parallel with the dog above it.
The ends of the arms g h of the dog f turn down, one on the right-hand side and the other on the left-hand side of the shifter i, and so that as the dog swings upon its pivot the shifter below stands in the path of the downward projections from the arms of the dog. The shifter t is constructed with a shoulder, at, upon one side of its pivot, and with a like shoulder, 02, upon the opposite side of its pivot. (See Fig. 8.) The arms g h of the dog through the downward projections therefrom are adapted to respectively engage the said shoulders at n, accordingly as they may be presented thereto. These shoulders m n are substantially opposite each other. The rear or free end of the shifter is constructed with a finger, 0, on the same side as the shoulder m, and which finger projects to the left, and upon the opposite side the shifter is constructed with a like finger, T, which projects to the right. As the dog is moved back ward and forward, as before described, under reciprocating movement, the turned-down ends of the arms 9 h work between the respective shoulders and corresponding fingers of the shifter, it being understood that the friction of the shifter on its bearing is sufiicient to resist the tendency of the dog to impart shifting movement thereto as the dog re treats, the friction of the dog upon its bearing being less than that of the shifter, so that the dog operates the shifter only as it engages its respective shoulders in the advance movement.
The operation of the dog and shifter is as follows: Suppose the shifter to be turned to the left, as indicated in Fig. 8", and the dog to be thrown back to the position seen in Fig. 3. In this backward movement of the dog the downward projection from the arm g will strike the finger 0 of the shifter, which stands in its path, and the said'finger will act as a cam to turn the dog to the position seen in Fig. 3, and under this movement of the dog the downward projection from the opposite arm will be brought into line with the shoulder n on the shifter, as seen in Fig. 3, and so that when the dog next advances the arm h will engage the shoulder n of the shifter, and as the dog completes its advance it will'turn the shifter to' the opposite side, as indicatedin brokenlines, Fig. 8. "Then when the dog next retreats the finger r of the shifter will stand in the path of the downward projection of the arm h, and that finger will now act as a cam upon the dog to return the dog, and so as to bring the arm g into line with the other shoulder, m, of the shifter, and then on the next advance of the dog the army will engage the shoulder m and return the shifter to the first position, and so continuing, .pne advance of the dog will turn the shifter to one side and the next advance of the dog will return the shifter to the opposite side. From the shifter is a downwardly-projecting stud, 8, (see Fig.
9,) which extends through a longitudinal slot, or, in the plate 0. (See Fig. 7.) This slot is in rear of the pivot V, upon which the,
plate 0 or holder is hung. The slot or permits longitudinal movement of the holder on the stud s, as will be hereinafter described. The
stud s vibrates with the shifter, and hence im-- right and left of the path of the needle, andv so that when properly adjusted the needle will first descend in line with the opening in the button-hole, and then in the next stitch will take onto the work at one side of the hole, and so continuing, the stitches being alternately made first in the line of the buttonhole and then in the material at one side, substantially as in other button-hole attachments. The feed to advance the work between successive stitches is produced by the actuating-lever J. The disk G is the feed-disk, and, as before stated, is substantially a part of the disk E, so that the disk E may partake of the intermittent or step-by-step rotative movement imparted to the disk G. To produce this stepby-step rotation of k the feed-disk, a feed-dog, 2, is hung to the lever J upon a pivot, 3, eccentric to the pivot on which the leverJswings, and upon the opposite side of the hub to the lever J, as seen in Figs. 1 and 10, and so that as the lever J swings up and down a corresponding down-and-up movement will be imparted to the dog 2. r I
Around the feed-disk Gis afriction-band, 4,
(see Fig. 5,) and outside this frictional band is.
aplate, 5, (seeFig.4,)which servesto retain the frictional band 4 on the disk G. The plate 5 forms a lever by which the band 4 is operated. The band 4 is an elastic divided ring, one end terminating in a shoulder, 6, and the other end in a corresponding shoulder, 7, (see Fig. 5,) one overlapping or extending beyond the other, the division in the ring permitting it tobe contracted close upon the surface of the disk G, or, when free, by its own elasticity to release the disk G. From the plate 5 is a radial projection, 8, on which a dog, 9, is hung upon a pivot, 10, the said dog being upon the same side of theplate as the frictional band 4. This dog hangs free upon its pivot, but-extends around the shoulder 7 and projects between the two shoulders 6 and 7 of the frictional band 4.
If the plate 5 be turned in the direction indicated by the arrow, Fig. 5, the operation is to turn the pivot upon which the dog is hung downward. In sodoingi the dog acts as a 1e: ver, the bearing of its nose upon the shoulder 7 of the band being the fulcrum, and the bear v ing ofthe nose upon the shoulder 6 being the weight, while the pivot is the power. Now,- under the descent of the pivot 10, the dog turns upon its fulcrum or shoulder 7 and raises the shoulder 6, and thereby contracts the band upon the disk G, so as to firmly engage. there the lever J.
with and cause the disk to partake ofthe rotation imparted to the band; but upon theupward or return movement of the plate 5 and the pivot 10 the reverse action of the leverlike dog occurs, and the band 4 expands under its own elasticity, so asto turn upon the disk G without imparting its rotation to the disk; hence under a vibratory or oscillating movement imparted to the disk 5 a'step-bystep rotationwill be imparted to the disk G.
()n the projection 8 from the plate 5 is a stud, 11, below one 'arm, 12, of the dog 2, and which stud 11 stands in the path of the dog as the dog descends, as indicated in Fig. 1, and
so that as the lever J approaches its up position the arm 12' of the dog 2 comes to a hearing upon the stud 11 of the plate 5, as indicated in broken lines, Fig. 1. On the other arm, 13, of the dog 2 is a nose, 14, standing in the plane of the cam M on the hub of the disk G; but when the dog is in its up position, as seen in Fig. 1, its nosestands away from the periphery of the cam M. As the arm 12 of the dog comes to a bearing upon the stud 1-1 of the plate 5, as before described, the dogwill be turned toward the cam M until the nose 14:
of the arm 13 comes to abearing'upon the cam seen in Fig. 10, so that now the dog stands locked between the cam M and the stud 11. Then as the lever J completes its rise the'dog is forced downward in such engagement with the cam and stud 11, and thereby causes the plate 5 toswiug with it and produce the clamping operation upon the disk before described, so that the advance movement of the disk is produced during the last part of the riseof Then as the leverJdescends the dog rises, and as the lever approaches its down position the dog strikes asto'p, 15, above,which is also on the plate .5, and then as the lever completes its descent the dog, rising, raises the stop 15 accordingly, and with it returns the plate 11 to the position from which'thedog had before turned it, and in such return of the plate 5 the friction betweendt and the feeddisk- G is relieved, so that the feeddisk remains stationary while the plate 5 is so returned. Thus ateach full reciprocation of the leyer J one step in advance is imparted to the feed-disk G,
As before-stated, the disk G forms substantially a part of the disk E, so that the disk E must partake of the intermittent or step-by-step rotative movement of the said disk G. To communicatethis step-by-step movement to the work-holder, a slide, 16, is arranged in longitudinal guides 17 parallel with the face of the disk E. In the side of the disk E is a crank-pin, 18, which works in.
a vertical slot, 19, in the slide 16, and so that in each full revolution of the-disk E a full reciprocating movement will be imparted to the slide 16, according to the throw of, the crank 18. This crank-pin is made adjustable in a radial slot, 20, in the disk E in theusual nianner for making adjustable crank-pins. From be to begin at one end of a button-hole'with the slide 16 a stud, 21, extends down through a longitudinal slot, 22, in the base A, as seen in Fig. 8, and so as to work into a corresponding transverse slot, 23, in the plate 0, as seen in Fig. 7, and so that the step-by-step movement of the slide 16 will be imparted to the work-holder throughout the full revolution of the disk E, and such full revolution of the disk E will impart a full reciprocating movement to the holderthat is, advance for one side of the button-hole during one half the revolution of the disk E and rearward for the other side of the button-hole during the other half of the revolution of the disk E.
As the action of the disk E upon the slide 16 is that of a crank, it necessarily follows that unless some provision be made to the contrary the extent of movement to the slide would increase as the crank passes from one dead-center to a point midway between the two dead centers and then diminish to the opposite dead-center,the result ofwhich would short stitches, gradually increasing until midway of the length of the button-hole, and then diminish toward the opposite end. It is true the variation would be slight; but to overcome such irregularity in the feed I arrange the cam M on the axisof the feed-disk, and make it of an elliptical shape, as seen in Figs. 1 and 10, the longest diameter being substantially parallel with the slot in the disk E, or so that the longer diameter of the cam M will be presented to the nose 14 of the dog 2 on the deadeenters. The result of this is that the dog will be brought into action upon the stud 11 earlier than it will be on the shorter, diameter, and the time of action of the dog will be proportionately increased, so that as the disk E is passing the dead-centers the feed produced by the dog will be longer than when on the smaller diameter, and the feed will gradually diminish toward such smaller diameter, then increase toward the opposite point of thelonger diameter. This cam therefore compensates for the variation in the length of steps produced by the crank-like action of the disk, and the stitches will be of equal length throughout the button-hole.
To prevent the return of the feed-disk after one advance movement under the action of the clamping-band 4, Iprovide a checking device substantially like the band 4, as seen in Fig. 6. This consists of a band, Q, like the band 4, and which is placed besideit upon the periph cry of the disk G, as seen in Fig. 4, and, like the band 4, it is divided, one end terminating in a hook-like shoulder, It, and the other in a shoulder, S, corresponding to the shoulders 6 7 of the band 4, the one shoulder overlapping the other in the same manner. On the stationary part of the frame a dog, T, is hung upon a pivot, t, its nose u standing between the two shoulders R and S in like manner as does the nose of the dog 9 of the band 4. The arrow in Fig. 6 indicates the revolution of the disk, as does the arrow in Fig. 5, the directions being the same. Revolving in the direction of the arrow, Fig. 6, the dog leaves the band Q free and open, so that the feed-disk G may rotate freely in the advance direction; but instantly upon the return of the disk G thefriction between it and the band Q inclines the band to turn with it, and in so doing the dog is turned upward on its pivot and acts as a lever between the two shoulders R S to force those shoulders asunder, and contracts the ring to so firm a bearing upon the disk that its return is prevented. Both the dog T of this stop or checking mechanism and the dog 9 of the feeding mechanism may be provided with springs which will hold them in their normal position, as shown; but the springs are not necessary.
One side of the button -hole having been stitched and the end reached to work across or around the end, the feed is substantially transverse or in a short semicircle. The operation of passing the end throws the work into a position that the needle may return upon the opposite side of the button-hole. To impart this transverse movement to the workholder, a cam, 24, is formed upon the hub F of the disk E, or made as a part of the disk, as indicated in Fig. 4, this cam being clearly seen in Fig. 11, and guided on the base is a slide, 25, having two arms, 26 and 27, extending upward, one each side of the cam 24, and so that the cam works between the two arms as a fork; hence as the cam revolves with the feed and crank disks it will impart a reciprocating movement to the slide 25. The cam 24 is in four divisions, as seen in Fig. 11. From the point 28 to the point 29 represents one side of the button-hole, and is the greatest projection of the cam and concentric with its axis. From 29 to 30 the cam gradually contracts, and this contracted portion occurs at one end of the button-hole; then from 30 to 31 is concentric with the axis and is ofthe smallest diameter and of substantially the same extent as from 28 to 29, corresponding to the other side of the button-hole; then from 31 to 28 is a rise in the IlO cam, like the fall off from 29 to 30, and corresponds to the opposite end of the button-hole.
On the base A beneath the slide 25 a bellcrank lever is hung upon a fulcrum, 32. One arm, 33, of this lever extends longitudinally beneath the slide 25. Theother arm,34,of this lever extends outward at right angles, and from the slide 25 an arm, 35, extends outward over the arm 34. The arms 34 and 35 are connected by an adjustable screw-pivot, 36, working in slots in the respective arms, and so that the reciprocating movement of the slide 25,imparted by the cam 24, as before described,will impart a corresponding transverse vibratory movement to the arm '33, as indicated in broken lines, Fig. 8.
From the arm 33 the stud V extends downward through the longitudinal slot W in the plate or work-holder O, and so that transverse movement of the arm 33 will be imparted to the work-holder to throw it from right to left and return, as indicated in Fig. 7. Upon the lower end of the stud V a collar, 37, is fixed as a support for the plate 0.
As the work approaches one end of the button-hole under the step-by-step rotative movement of the feed-disk, the cam 24, working accordingly, brings one of its extreme points say 29 to one arm of the slide and the opposite point, 31, to the other arm of the slide. Then the slide commences itsreciprocating movement under the corresponding. rise and fall of the cam until the opposite points,30 and 2S,are reached,and during themovement of the slide 25 under the rise and fall of the cam the lever'arm 33 is turned to one side and cone spondingly throws the work-holder. Then as the rise and fall of the cam 24 again come upon the slide it will, step by step, throw it to the opposite extreme and correspondingly turn the work-holder and present the buttonhole for the opposite side, the stitching being made around the end during the step-by-step movement over the rise and fall of the cam, and this same movement will occur at each end of the button-hole.
To adjust the feed so as to adapt it to button-holes of different lengths, the stop 15 is made adj ustable,so as to bring the dog2 sooner or later into contact with it, and to make it so adjustable the stop is in the form of a cam, so that by rotating the cam it will present a portion of its surface sooner or later to the dog, accordingly as it is turned to bring its varying extent into the path of the. dog.
The length of the button-hole will be varied by adjusting the crank-pin 18 in theslot 20,to bring it nearer to or take-it farther from the axis of revolution of the disk E.
In operating uponthe button-hole it is necessary to have a supporting work-plate be-' neath which will yield to varying thicknesses of the materialand practically form a universal adjustment with relation to the work-holder. To accomplish this object'I construct an auxiliary Work-plate, 38. (See Figs. 12, 13,
1,4, and 15.) This plate is made from thin flatsheet metal, and is constructed with a needleopening, 39, corresponding to the usual needle-hole of a sewing-machine work-plate. 40 represents the usual shuttle-race cover. The work-plate 38 is hung to this cover by two studs, 41 and 42. These studs are made fast in the work-plate 38 and extend through corresponding holes in the plate 40; but the studs are considerably longer than the thickness of the plate 40 and headed beneath the plate 40, as seen in Figs. 14 and 15, so that the plate 38 is prevented from separation from the plate 40, and when the plate 40 is in place the plate 38 stands in its proper position with relation to the needle-hole and beneath the work-holder. Upon the under side of the plate 38 and around the needle-hole 39 is a downward tubular projection,43, which takes a bearing on the work plate below around its needle-hole as a pivot on which the plate 38 may oscillate. The studs 41 and 42 leave the plate 38 free to thus oscillate upon its pivot 43, but yet hold it always in the same. relation to the needle-hole, and thus anniversal rocking movement is permitted to the cepting in combination as hereinafter speci- I claim 1. In a button-hole attachment substantially such as described, the combination of the feed-disk G, the actuating-lever adapted to swing under the reciprocating. movement of the needle-bar, the divided band 4 around said feed-disk G, the ends of the said divided band overlapping and constructed, respectively, with shoulders 6 7, the plate 5, hung upon the axis of the feed-disk and adapted to oscillate thereon, the dog 9, hung to said plate 5, its nose extending between said shoulders 6 and 7 and so as to take a bearing thereon, with connections, substantially such as described, between said actuating-lever and said plate 5, substantially as described.
2. In a button-hole attachment substantially such as described, the combination of the feed-disk G, the actuating-lever adapted to swing under the reciprocating movement of the needle-bar, mechanism, substantially such as described, between said actuating-lever and said disk, whereby a step-by-step rotative movement is imparted to said disk, africtional plate 38, that it may adapt itself to the work. 7
band, Q, around said disk G, the said band 1 divided, its two ends extending one beyond the other, and the said two ends constructed, respectively, with shoulders R S,with a dog, T, hung upon the frame of the attachment, its nose extending between said two shoulders,R S,and adapted to bear thereon, substantially as and for the purpose described.
3. In a button-hole attachment, the combination of the actuating-lever J, adapted to swing under the reciprocating movement of the needle-bar, the feed-disk G, the plate5, hung upon the axis of said feed-disk, mechanism, substantially such as'described, to engage said disk and plate in one direction, but leave said disk free in the opposite direction, the dog 2, hung to said actuating-lever, the said dog constructed with an arm, 12, to engage with the said plate 5, and also constructed with an arm, 13, to engage abearing upon the side of the dog opposite the arm 12, the said plate provided with a stop above said dog,substantially as and for the purpose described.
4. In a button hole attachment substantially such as described, having a cloth holder and feeding mechanism, the combination thereto engage said disk and plate in one direction and leave said disk free in the opposite direction, the said plate provided with the stud 11, the dog 2, hung upon the said actuating-lever, the cam M, fixed to the axis of said feed-disk, the said dog constructed with an arm, 12, upon oneside to engage the stud 11, and with anose,
' 14, upon the opposite side to engage said cam,
feed-disk, the said dog constructed with an arm, 12, upon one side to engage the stud 11, and with a nose, 14, upon the opposite side to engage said cam, an adjustable stop, 15, on the said plate '5 and above said dog, substantially as and for the purpose specified.
' 6. In a button-hole attachment for sewingmachines, the combination therewith of a work-plate, 38, constructed with a needle-hole, 39, and with a tubular pivot, 43, around said needle-hole upon the under side of the plate, with the shuttle-race cover 40, the said plate loosely hung to said cover, substantially as described, and so as to permit universal oscillation of said work-plate, substantially as described.
- ALBERT W. JOHNSON. VVituesses:
FRED O. EARLE, J. H. SHUMWAY.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3146741A (en) * 1961-03-10 1964-09-01 Mite Corp Buttonholers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3146741A (en) * 1961-03-10 1964-09-01 Mite Corp Buttonholers

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