US2009560A - Button sewing machine - Google Patents

Description

July 30, 1935. H. w. MORRIS BUTTON SEWING MACHINE Filed July 26, 1933 3 Sheets-Sheet l- July 30, 1935. w MORRls 2,009,560

BUTTON SEWING MACHINE Filed July 26, 1933 3 Sheets-Sheet 2 ifl/ V240 iii diffs y 1935- H. w. MORRIS 2,009,560

BUTTON SEWING MACHINE 7 Filed July 26, 1953 3 Sheets-Sheet 5 AZ /0 F M5 /fz flfl E, if/ii m W M 56 [Z 9] if! Patented July 30, 1935 PATENT OFFICE BUTTON SEWING MACHINE Harold W. Morris, Waltham, Mass., assignor, by

mesne assignments, to the Singer Manufacturing Company, Elizabethport, N. J., a corporation of New Jersey Application July 26, 1933, Serial No. 682,216

22 Claims.

This invention relates to machines for sewing buttons to work and has for an object to provide a simple machine of low cost which is capable of sewing either two or four hole buttons at the will of the operator and which may be conveniently operated by hand. Such a machine is particularly intended for use in laundries, hospitals, and institutions of various kinds where there is considerable occasion for replacement of buttons on garments but where the expense of a commercial power operated button sewing machine of large button sewing capacity is not warranted by the amount of work to be done.

One' of the important features of the present invention relates to mechanism by which the machine may be quickly adjusted to sew either two or four hole buttons.

Another feature of the invention relates to mechanism for predetermining the number of stitches for a sewing operation, rather than leaving this to the caprice of the operator.

Further features relate to improvements in various parts of the mechanism having to do with the handling of the work and with the sewing operation itself.

For a more complete understanding of this invention reference may be had to the accompanying drawings in which,

Figure 1'is a vertical section through an embodiment-of the machine taken on line I--l of Figure 2. I

Figure. 2 is a top plan of the same.

Figure 3 is a view partly in front elevation and partly in section of the machine.

Figure 4 is a fragmentary view showing the sewing head in section on the line of the needle bar.

Figure 5 is a fragmentary section to a larger scale on line 5-5 of Figure 3 showing the thread clamp applied.

Figure 6 is a view similar to Figure 5 but showing the thread clamp released.

Figure 7 is a detail in perspective of a portion of the button clamp lifter and which also actuates the thread clamp and pull off.

Figures 8, 9 and 10 are fragmentary inverte plan views to a larger scale than Figures 1, 2 and 3, showing the adjusting mechanism for two hole and fourhole buttons, Figures 8 and 10 showing the machine adjusted to sew four hole buttons and Figure 9 hole buttons.

Figure 11 is an inverted plan view of the machine, parts being broken away.

showing it adjusted for two Figure 12 is a detail section on line l2-l2 of Figure 11.

Figure 13 is a perspective of one of the parts of the adjusting mechanism for two hole and four hole buttons.

, Figure 14 is a view similar to a portion of Figure 11, but showing certain parts in different position.

Figures 15, 16 and 17 are detail sections to a larger scale on the correspondingly numbered section lines of Figure 11.

Figure 18 is a. detail perspective of cooperating elements of the button clamp vibrating mechanism.

Figure 19 is a view partly in side elevation and partly in section of the work holder.

Figure 20 is a top plan of the same.

Figure 21 is a front elevation of a thread finger.

Figure 22 is a detail elevation of a portion of the same.

Referring to thedrawings, the machine, as shown, comprises a base or bed I mounted on a suitable standard 2. As shown, the machine is a bench machine so that the standard 2 is arranged for support on a table or the like and is sufficiently tall to hold a hand crank 3 fixed to an operating shaft 4 journalled in the base sufficiently far above the table top to permit convenient turning of the crank. As is usual with machines of this type, the base I may be removably hinged to the standard 2 so as to permit ready. access from beneath to the mechanism within the base I. At one endof the base I is arranged the upright portion 5 of a sewing arm which has a lateral extension 6 spaced above the bed and carrying at itsfree end'the sewing head 1 in the usual manner. This sewing head' I has reciprocable therein a needle bar 8. This bar may be moved axially by any suitable means but, as shown, this motion is produced through a link 9 pivotally connected at one end to the needle bar as at N and at its other end pivotally connected to a crank arm ll fixed to the end of a shaft I2 journalled lengthwise in the portion 6 of the sewing arm. This shaft is driven from the 4 drive shaft 4 through the vertical shaft l3 and intermeshing bevel gears I4 and I5, I6 and I! at opposite ends thereof.

The forward end of the drive shaft/4 carries a .rotary loop taker or looper 20 of any suitable construction positioned below the top face of the base I and cooperating with a needle 2| fixed to the lower end of the needle bar. Also cooperating with the looper 28 and the needle 2| is a thread finger shown in detail in Figures 21 and 22. This thread finger, as shown, consists of a hook shaped element 22 having a bevelled end 23. Against one face of this element 22 is secured as by the screw 24 the looped rear end 25 of a small pin 26 which extends through ahole into the element 22 and projects on the opposite side thereof as at 21. This thread finger is rocked forwardly to take the thread loop and hold it in proper position for the needle to pass therethrough on its downward stroke, the needle passing down just back of the element 26. This finger is carried by -a rock shaft 30 which is rocked in suitable time with the rotation of the shaft 4 by means of a cam 3| on the shaft 4 cooperating with a follower 32 on the shaft 30. Aside from the specific construction of the finger itself, this is usual mechanism for cooperating with the looper an the needle to aid in forming stitches.

Workholder On the top face of the bed I at one side of the needle is mounted work holding means which, as shown best in Figures 19 and 20, comprises a plate 40 having an actuating post 4| fixed therein and which extends through a hole 42 (see Figure 3) in the upper face of the base and which is actuated by mechanism which will later be described. At one end of the plate 40 is secured thereto a cloth plate 43 having a throat 44 therethrough through which the needle passes. This cloth plate 43 is slidable over a work plate 45 (see Figure'Slsecured on the top face of the base and which. also has a throat 46 therethrough. The plate 40 is secured to the top face of the bed I for slidable motion thereon as by means of screw 50 (see Figures 2 and 3) which passes dowr i g Cycle;

through a longitudinal slot 5| in the plate 40 and is threaded into the upper face of the base By this mounting the plate 40 may be given a rocking motion and also a longitudinal sliding motion of a limited extent. This plate 40 also carries a button clamp. To this end it has pivotally supported thereon adjacent to its end opposite to the cloth plate a support to the upper face of which is adjustably secured as by screws 56 threaded thereinto the main member 51 of the button clamp; This member 51 is formed as a plate and has slots 58 therethrough at its rear end for the passage of the screws 56. The plate 51 may support button clamping jaws of any suitable description. As shown, two side jaws 580 are employed each of which is pivoted at its rear end to the under face of the plate 51 as by the screws 59. Between the jaws 580 is positioned a rear clamp jaw 60 which is mounted for motion lengthwise of the plate 51, being for this'purpose carried by a slide 6|. The slide 5| is shown as provided with inclined slots 62 for the reception of guide pins 63 secured to the side jaw members 580 so that as the slide 6| is moved, it swings the side jaws and moves the rear jaw so that all move toward and from each other, simultaneously. The slide 6| is supported against "the under face of the plate 51 as by means of the head 65 of a screw which passes through a longitudinal slot 61 in the plate 51 and is threaded rate operation to receive it. To this end a retaining device, shownat 15, has been devised, this device consisting of a bar fixed by a screw and slot connection at 16 to the upper face of the plate 51 and having a hooked forward end 11 which extends about the screw head 65. By extending this hooked end beyond a line joining the axes of the screw head 65 and the adjusting screw 16, the spring-pressure of the screwhead 65 against the retaining device 15 does not tend to shift the retaining device sidewise or laterally of the slot 61 about the screw 16 as a pivot and thus loosen the screw and slot connection. Heretofore there has been considerable difliculty in providing a retaining means which will maintain any adjusted position.

workholder actuating mechanism The workholder comprising the cloth plate 43 and the button clamp is arranged to be vibrated.

between successive strokes of the needle in order to work, for moving the workholder including the clamp laterally of its vibrating motion so as to present first one pair of holes in the button in operative relation to the needle for a predetermined number of needle strokes and then to shift the button so as to bring the holes of the other pair into cooperative relation to the needle so that the total numberof stitches will be divided between the holes of each pair during the stitch- The means for producing these motions of the workholder act upon the post 4|.

Referring first to Figures 1 and 17, the shaft 4 has fixed thereto a worm 88 which meshes with a worm wheel 8| journaled on a stub shaft 82 having its inner end threaded as at 83 into a boss 84 projecting downwardly from the lower face of the upper wall of the bed I. The lower end of this stub shaft 82 may be formed with a slotted head 85 which will-facilitate its removal when desired. Between this head 85 and the worm wheel 8| are positioned a pair of edge cams 85 and 81 which are held suitably spaced from each other and from the worm wheel 8 IV either by separate spacers 88' or hubs integral with the cams as may be desired (see Figure 17). The lower cam 86 produces the lateral vibrating motion of the workholder to present the holes of a pair alternately into the needle path; and, in-order to provide for desired angular adjustment of this cam 86, it is shown as provided with a pair of arcuate slots 88 through which screws 88 may be passed to secure the cam disk 86 to the cam disk 81 and to worm wheel 8|. As shown, this cam disk 86 has a series of elevations 98 between which are the valleys 9|, one of the elevation points 90' being the length of two of the'other elevations and an interposed valley 9|. Engaging with the edge of this cam is a follower 82 on an-arcuate rock arm 93. This rock .arm 83 is fulcrumed at 94 on a boss 85 extending downinto the slide 6|. A spring 10, shown as formed 'wardly from the upper wall member of the base of a single piece of spring wire having its ends engaging the edges of the clamp elements 580, tends to hold the jaws closed thereagainst when a button is placed therebetween, pressing the slide 6| forwardly. 'It is, however, desirable to limit the closing .movement of the jaws so that a button can be pushed therebetween without requiring the jaws to be pushed apart by a sepa- (see Fig. 15). The follower 92 is held pressed against the edge of the cam disk" 85 as by means of the spring 920. The pivoted arm 83 is provided with an arcuate undercut slot 85 within which may ride the head 91 of a square headed screw 98 which is threaded into the end of an adjustable pivot 99 (see Figure 18) having a head Hill by which it may be turned to free the head 81 in the slot 96 or to clamp said pivot in fixed position therein. Pivotally carried on the pivot 99 is an arm I05 through the outer end of which is threaded a screw I06 which passes through a slot I01 in a guide bracket I08 extending inwardly from one end wall of the base I. To the link I05 is secured a Z-shaped bar I I (see Figure 15) one horizontal flange of this bar being secured as by the screws I I I to the upper face of the link I 05. A reenforcing brace I I2 is shown as secured at opposite ends to the link I05 and the upwardly extended or vertical portion of the bar H0. The upper horizontal flange II5 of the bar H0 is laterally slotted as at II6 (see Figure 14) and the post 4| of the workholder extends therethrough. Rocking of the arm 93 by engagement of its cam follower 92 alternately with the low and high portions of the cam 86 causes the link I05 to be given a longitudinal motion which in turn causes the post M to be moved in a direction transverse to the length of the button clamp and causes it to.

rock or vibrate laterally about the screw 50 :as a center thus to bring alternately each of the holes of a pair in a button held by the clamp into'the needle path. The extent" of vibrating motion is determined by the adjusting of the pivot 99 lengthwise of the arm 93. A spring II9 fixed at one end to the button clamp and at the other to a fixed point takes up any lost motion in the vibrating mechanism. This alternate vibration takes place after the machine is started and continues until, at the close of a stitching operation, elevation '90 becomes active whereupon the needle is caused to descend twice into the same hole in the button, thus to produce a button knotting stroke in a manner well understood in the art. 'After this knotting stroke has been made, and the needle has been elevated, the machine is automatically stopped. As shown, this is produced by means of a stop pin I20 which snaps into a hole I2I in the cam disk 86. As shown best in Figure 17, this pin I2!) is fixed in the outer end of a bar I22 which rides in a channel I23 in a lug I24 extending inwardly from one side of the base I, as shown best in Figure 11. Through this lug I24 is a perforation I25 within which is positioned an axially movable stem I26 having a head or push-button I21 at its upper end. The upper portion of the lug I24 is counterbored as at I28 to form a socket for receiving a spring I29 which surrounds the stem I26 and bears at opposite ends between the face of the counterbored portion and the head I21, thus tending to lift the stem I26 and project the pin I20 into the hole I2I as soon as the hole I2I is positioned opposite to the pin.

When it is desired to sew four-hole buttons instead of two-hole buttons, it is necessary, before the end of the sewing operation to shift the clamp laterally of its vibrating direction so as to present the second pair of holes in the button into the needle path; and in this machine provision is made for easily adjusting the mechanism so that when desired the button clamp is held in position for the needle to cooperate with the two-holes'of a two-hole button and when it is desired to sew a four-hole button the needle first stitches through one pair of holes and thenthe button clamp is moved automatically to cause the needle to stitch throughthe other pair of holes. This mechanism for shifting the button clamp laterally of its vibrating direction includes the cam 81 as its actuating element, connections for this purpose being shown more particularly in Figures 8, 9 and 10. At I35 in these figures is shown a rock at I36 (see Figure 12) on a pivot projecting through a boss I31 also forming a part of the base I; the pivoted arms I35 and 93 being substantially at right angles to one another. It is provided with a cam follower I38 which is held against the edge of the cam 81 as by means of a coil spring I39. This cam 81 has two arcuate faces of different diameters at I40 and I so that during a single rotation of the cams 86 and 81 constituting one sewing operation, it is caused to be rocked in one direction at a point intermediate the ends of the stitching operation and then just at the end of this operationit is returned to its initial position. The upper face of the arm I35 has formed therein a longitudinal channel I45 within which rides an adjusting arm I46. The end of this arm adjacent to the pivot I35 is turned upwardly as at I41 and extends through a slot I48 in the top face of the base I where it can be grasped by the operator so as to be shifted lengthwise of'the guide groove I45 in the arm I35. At the inner end of this arm I46 it has secured therein a stud I50 which is slidable in a slot I5I in a lever I52. This lever I52 is fulcrumed at I53 on a rib I54 attached to or integral with the base I. The free end of this lever I52 is connected through the link I55 to the lower portion of the post 4I. Thus, as the pivoted arm I 35 is rocked by the cam\8'l, the post M is moved lengthwise of the slot H6 in the link I05 the motion of which produces the lateral vibration of the button clamp between successive needle strokes. This motion of the link I55 therefore is efiective to move the button clamp lengthwise of its slotted connection with the retaining screw 50. When the adjusting element I46 is in the position shown in Figures 8 and 10, rocking of the arm I35 causes rocking of the lever I52; but, by moving the arm I46 to the other end of 'its path, the pivot I50 is moved into aligmnent with the axis I36 about which the arm I 35 vibrates so that motion of the arm I35 is then ineffective toswing the lever I52. The parts are so formed that when the arm I46 is in this position, the button clamp will be held from motion laterally of its vibrating motion and in such a position that the two holes of a single pair in the button are alternately registered with the needle. This adjustment of the parts is shown in Figure 9. A stop screw I60 may be adjustably secured in the slot I5I thus to fix the inner limit of motion of the adjusting arm I46, thus to determine the amplitude of motion of the button clamp when it is used in connection with four-hole buttons so that a motion of the button clamp corresponding to the spacing of the two pairs of holes in the button may be effected.

Sewing thread supply mechanism Adjacent to the upstanding portion 50f the sewing arm, the base of the machine supports a removable cover I86 whichnormally closes the forward end of the sewing head. After passing through the hole I85, the thread passes through the tension I81 and then through an eye I88 of a pull-off arm I89 fulcrumed at I90 on the forward face of the cover I86. From this pull-oil? arm the thread passes around a pin I9I of a thread clamp shown best in Figures 5 and 6, and then it passes upwardly and through an eye I92 extending through aslot I93 in the cover I86 and secured to the needle bar 8. From this eye I92 the thread extends to the eye of the sewing needle Referring particularly to Figures 5 and 6, it will be seen that the pin I8I of the thread clamp is provided with an annular clamping shoulder 200 and a portion I of reduced diameter which extends through and beyond a bushing member 202 secured in an opening through the cover I86.

outwardly of the clamping flange 200 is positioned a guide plate 203 which is secured rigidly as by the screw 204 to a spacer205 and a back,

plate 206 of the clamp which engages the outer face of the cover I86. Near its lower end the back plate 206 is provided with an opening 201 within which projec=s a rib 208 struck backwardly from the plate 203, thisrib preventing accidental disengagement of the thread from between the plates 203 and 205. Under normal conditions, the thread bears around the pin I9I, as shown at 2I0, between the clamping flange 200 and the outer plate-203 and during the sewing operation the thread is free to be drawn about this pin. At the end of the sewing operation, however, the button clamp is manually raised to break the thread, after the knotting needle stroke has been made, to release th'e 'work so that it may be removed from the machine; and, according to this invention, means are provided whereby on the raising of a the button clamp the thread clamp is actuated to grip the thread and then the pullofi is actuated to pull thread through the tension in order to provide a sufficient length to start a succeeding sewing operation without danger of the thread being pulled back through the needle eye which might thus become unthreaded during the initial sewing strokes. For

raising the button clamp a vertically movable bar 220 is herein shown,'- this bar having secured at its lower end a hook member 22I .(see Figure and at its lower end against a shoulder 228 formed at the base of the reduced diameter portion. This spring normally holds the bar 220 lowered and the pressure exerted by this spring may be adjusted by manipulation of the plug 226. This bar 220, as shown, is provided with a cam block 230 which may be' split so as to be clamped to the bar 220 as by means of a clamp .screw 23I.

This clamp screw may also secure in position an L--'shaped Wire spring element 232, asshown best in Figure '7. This cam block 230 f is provided with a cam extension 233 (see Figelement 234 is provided with a cam portion 238 extending beneath the cam extension 233 of the block 230 and is soformed that when the finger lever 236 is lifted, as shown in Figure 4, the parts cooperate to retain the bar 220 in elevated position which thus holds the button clamp raised from the work and in the position shown in Figure 3. By pressing downwardly on the finger lever 236 however, the cam portion 238 is so rotated as to permit the block 230 to descend, aided by the spring 221, thus lowering the button clamp into sewing position. This raising of the button clamp also acts 'to actuate the thread lock. For this purpose, the block 230 is provided with a bevelled upper edge 240 which, when the block is raised, impinges on the inner end of the portion 20I of the clamp pin I8I and forces it outwardly and there holds it in the position shown in Figure 6, the clamping flange 200 then being pressed outwardly toward the outer clamp plate 203 and gripping the thread between these parts. During this raising of the button clamp, the thread pull-off I89 is also actuated. For this purpose the arm I89 has an extension 245 which extends through a slot 246 in the cover I86 and in between the horizontal portion of the spring element 232 and the block 230 so that, asthe block 230 is raised, the pull-oil arm I88 is swung outwardly into the position shown in Figure 3 and pulls ofi thread through the tensions I81 and 84.

Machine operation When it is desired to start the sewing operation, the work is inserted beneath the button clamp, which is then elevated. The button is placed in position in the button clamp and the button clamp is lowered onto the work by pressing downwardly on the finger lever 236. This causes the return of the thread pull-01f I88 by-the yielding engagement thereon of the spring element 232 and it also causes the release of the thread clamp 200.

The arm I46 having been adjusted to the correct position for the type of button being sewed, Whether two or four hole, and the stop motion 7 button I2'I being depressed to release the stop pin I20 from the hole I2I in the cam disk 86, the sow.-

ing operation may be started by turning the crank 3. The crank is turned sufficiently to produce a single rotation of the controlling cams '86 and 81 whereupon the stop pin I20 springs into the hole I2I in the cam 86, stopping the sewing operation just after the knotting stitch has been formed. and after a predetermined number of sewing stitches have been placed alternately through the holes of the button. In case of a four-hole button, the arm I46 is moved to its forward position, Figs. 8 and 10, before the machine is started A predetermined number of stitches are placed through one pair of holes inthe button, then the button is moved automatically to present the other pair of holes and the stitching is continued for the full .number of needle strokes until the sewing operation has been completed. After the sewing operation is completed, the finger lever 236 is raised, raising the button clamp and breaking the thread, whereupon the work is removed.

From the foregoing description of an embodiment of this invention, it should be evident to one skilled in the art that various changes and modifications might be made without departing from the spirit or scope ofthis invention the appended claims.

I claim: V 1 1. In combination, sewing instrumentalities including a needle, work holding means including a button clamp, -means operative to move saidto move said connection between positions one of clamp laterally of the length of the needle between successive sewing strokes to position alternately each of two holes of a pair in the button into the needle path, automatic means for shifting said clamp after a predetermined number of stitches have been made at right angles to said lateral motion to bring holes of another pair in the button into operative relation to said needle, and means actuable at the will of the operator for rendering said automatic means operative or inoperative.

2. In combination, sewing instrumentalities including a needle, work holding means including a button clamp and a cloth plate, means operative to move said work holding means laterally of the length of the needle between successive sewing strokes to position atemately each of the two holes of a pair in the button into the needle path, automatic means for shifting said work holding means after a predetermined number of stitches have been made at right angles to said lateral motion to bring holes of another pair in the button into,

operative relation to said needle, and means actuable at the will of the operator for rendering said automatic means operative or inoperative.

3. In a button sewing machine, sewing instrunentalities including a needle, work holding means including a button clamp, means for relatively vibrating said clamp and needle laterally of the length of the needle between its sewing strokes to present the holes of a 'pair in the button alternately into the needle path, a pivoted lever, means for rocking said lever after a predetermined-number of stitches have been made, and connections between said clamp and said lever movable from and to the pivotal axis of said lever for moving said clamp perpendicular to said vibrating direction to present holes of another pair inthe button into operative relation to the needle only when said connection is spaced from said axis. V

4. A button sewing machine comprising a base, a sewing head supported by and spaced from said base, a reciprocatory needle bar in said head, means including a loop taker in said base for cooperating with a needle carried by said bar to form stitches, a button clamp on'said base for holding a button in position to be sewed to, work by said needle and cooperating means, means in said base and connected through an opening therein with said clamp for vibrating said clamp between needle strokes to present alternatelyholes of a pair in the button into the needle path, means in said base actuable to move said clamp laterally of its vibratory motion after a predetermined number of stitches have been made to present 7 holes of another pair in the button into operative relation to the needle, and means accessible from outside of said base and actuable to render said clamp moving means operative or inoperative.

5. A button sewing machine comprising a base, a button clamp mounted on said base, sewing instrumentalities including a needle for sewing to work a button held by said clamp by stitches passed alternately through each of the holes of a pair in the button, means including a pair of connected pivoted arms and means for rocking one'of said arms after a predetermined number 01 stitches have been made for moving said clamp for bringing another .set ofholes in the button into co-operativerelation'to the needle, and an element fixed to the connection between said arms and accessible. for actuation outside of said base which is in the axis of rocking of said one arm.

6. In a button sewing machine, a button clamp, and means for moving said clamp in directions substantially at right angles to each other comprising a pairof pivoted arms arranged substantially at right angles to each other, a-link guided at one end thereof for pivotal and sliding movement and adjustable angularly about its pivot toward and from the axis of one of said arms, said link having a transverse slot, a post fixed to said clamp and riding in said slot, a link pivotally connecting said post with the other of said 'arms for moving said post lengthwise in said slot, and means for rocking said pivoted arms.

'7. In a button sewing machine, a button clamp, and means for moving said clamp in directions substantially at right angles to each other comprising a pair of pivoted arms arranged substantially at right angles to each other, a link guided for pivotal and sliding movementat one end portion thereof and pivotally connected to one of said arms, said link having a transverse slot, a postfixed to said clampand riding in the said slot, a link pivotally connecting said post with the other of said arms for moving said post lengthwise in said slot, and means for rocking said pivoted arms.

8. In combination, sewing instrumentalities including a needle, a thread tension, a thread clamp between said tension and needle, a thread pull off between said tension and clamp, a cloth support having a throat through which said needle passes, a button clamp above said support mounted to be raised from said support, and means actuable to raise said button clamp, to actuate said thread clamp to clamp the thread, and to actuate said pull ofi to pull thread through said tension.

9. In a sewing machine, a sewing head, sewing instrumentalities including a needle, a thread tension, a thread clamp, a thread pull off between said clamp and tension, and means within said, head for actuating said clamp and pull on to draw thread through said tension.

10. In combination, sewing instrumentalities including a needle, a thread tension, a'thread clamp between said tension and needle, a thread pull off between said tension and clamp, and manually operated means for first actuating said clamp to clamp the thread and then actuating said pull off to pull thread through said tension.

11. In a sewing machine, a sewing head having a front cover provided with a slot therethrough, a thread pull off pivotally mounted on said cover and having a portion projecting through said slot, and means in said head and having spaced parts between which said portion extends movable to actuate said pull-ofi'.

12. In a button sewing machine, a button clamp mounted for vertical motion, a sewing head spaced above said clamp, a bar mounted for verand a finger lever extending from said cam outwardly of said head for turning said cam to raise and lower said clamp.

13. In a button sewing machine, a button clamp mounted. for vertical motion, a sewing, head spaced above said clamp, a bar mounted-for vertical movement in said head and at its lower end having cooperative engagement with said clamp, a cam follower on said bar, an edge cam pivoted in said head and supporting said follower, and

atively connected to said jaws to move them to-- ward and from each other upon movement in opposite direction from said slide, yielding means for pressing said jaws toward each other, said slide having a part extending from said plate, and means for limiting the closing movement of said jaws comprising a slotted finger, a set screw extending through said slot for addustably receiving said-finger, said finger having a hook errgageable about said part on both sides of a line passing through the axis of said part and said set screw.

15. In a button sewin g'machine, a work holding means including a button clamp, sewing in strumentalities including a needle, means including a cam for relatively moving said clamp and needle laterally of the lengthof the needle to present each of. a plurality of holes of a buttomat different timesinto the path of the needle, said cam having a hole therein, a stop pin spring pressed toward said cam to snap into said hole and thereby stop the machine, and manual means for retracting said pin to permit starting the machine for a subsequent sewing operation.

16. In a sewing machine, work holding and sewing means, actuating mechanism for said means, a machine bed housing certain of said mechanism, said mechanism including a rotatable member within said bed having a hole therein, a pin spring pressed toward said member in position to snap into said hole and stop the machine at the end of a sewing operation, and a stem operatively secured to said pin and projectingthrough the upper end of said bed actuable by the operator to retract said pin from said hole to permit ,the machine to be started.

17. In a button sewing machine, work holding means including a button clamp, sewing instrumentalities including a needle, means including a cam for relatively moving said clamp and needle laterally of the length of the needlefto present each of a plurality of holes of a button at different times into the path of the needle, said-cam having a. hole therein, a pin spring-pressed toward said cam in position to snap in'tosaid hol'e and stop the machine at the end of a sewing opelement havinga" hole therethrough adjacent to one end, and a pin secured to one face of said element adjacent to said hole and passed through and projecting on the opposite side thereof.

19. In a sewing machine, in combination, a main shaft, stitch-forming mechanism actuated by said main shaft, work-holding means, a feedcam making one rotation for a plurality of stitchforming cycles and connected at all times to be driven by said main shaft, means actuated by said feed-cam for relatively moving the stitchforming mechanism and work-holding means to place the stitches .in the desired order or arrangement, and releasable means for blocking the feed-cam against further movement by said main shaft, and thus also blocking further movement of the main shaft and the stitch-forming mechanism, at the completion of a plurality of stitches.

20. In a sewing machine, in combination, a main shaft, a stitch-forming mechanism actuated by said main shaft, work-holding means, a feedcam making one rotation for a plurality of stitchforming cycles and connected at all times to be driven by said main shaft, means actuated by said f eed-cam for relatively moving the stitch-forming mechanism and work-holding means to place the stitches in the desired order or arrangement, and

releasable means acting automatically at the completion of a predetermined number of stitches 'to block the' feed-cam against further movement bed and cooperating with said feed-cam to block the movement of the latter received from said main shaft and thus stop the main shaft and stitch-forming mechanism at the completion a predetermined number of stitches.

22. A sewing machine having a frame includ ing a bed and an overhanging bracket-arm terminating in a head, a removable face-plate .on said head, sewing instrumentalities including a needle, a thread-tension and a thread-clamp mounted on said face-plate, a cloth-support, a

button-clamp above said support mounted to be raised from said support, manually operable means in said head connected to raise said button-clamp, and a thread pull-01f mounted on said face-plate to engage the needle-thread between said thread-clamp and thread-tension, said pulloif being connected to be operated bysaid manually operable .means.

HAROLD'W. MORRIS.

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