US1770025A - Buttonhole-sewing machine - Google Patents

Description

July 8, 1930. .1. w. CONNORS 'BUTTONHOLE SEWING MACHINE 5 ,Sheets-Shv-b Filed. Sept. 27, 1926 W ATTys.

ZvenTor. "John W. Connors y 1930. "J. w. CONNORS 1,770,025

BUTTONHOLE SEWING MACHINE Filed Sept. 27, 1926 5 Sheets-Sheet 2 lnvenTor. John W.Con nor's ATTys.

July 8, 1930. w, CQNNORS I 1,770,025

BUTTONHOLE S EWiNG MACHINE Filed Sept. 27. 1926 Sheets-Sheet 3 \nvenToT.

John W. Connors WQMMXW ATTys.

"July 8, 1930. J w. CQNNORS BUTTONHOLE SEWING MACHINE F i'led Sept. 27. 1926 5 Sheets-Sheet 4 Fig. 10. Figll.

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BUTTONHOLE SEWING MACHINE Filed Sept. 27, 1926 5 Sheets-Sheet lnvenTor. John Connor s AITys.

Patentedv July 8, 1930 TENT OFFICE JOHN w. commons or DEDHAM, MAssAoH USETTS, ASSIGN'OR TO THE REECE BUTTON HOLE MACHINIE- COMPANY, OF BOSTON, MASSACHUSETTS, A COIPPORATION OF MAINE BUTTONHOLE-SEWING MACHINE Application filed September 27,*1926. Serial No. 137,888. In each of, United States Patents No.

1,497,215, June th, 1924: and No. 1,532,301,

April 7th, 1925 is shown a buttonhole sewing machine constructedso that it will sew either a buttonhole with an eye at one end or a so-called straight buttonhole, that is, a buttonhole without an eye at the end.- In buttonhole sewing machines of the type. s own in said patents the stitch-forming mechanism is construct-ed to be rotated through a'half circle at the end of the buttonhole and when the buttonhole is to be sewed with an eye at the end then the stitch-forming mechanism is continued in 0 Jeration during its rotation around the end 0 the buttonhole and at the same time the stitch-forming mechanism andJvork are given a relative lat eral movement which gives the eye shape to the end of the buttonhole. If aistraight buttonhole is to'be sewed then the stitchforming mechanism is automatically rendered inoperative when one side of the buttonhole has been completed and remains inoperative while it is being turned around the end of the buttonhole and then is automatically rendered operative again for stitching the other side of the buttonhole.

The present invention relates to a buttonhole sewing machine of this type and has for one ofits objects to provide improvements therein'by which the buttonhole sewing machine may be used to sew either-a buttonhole with an eye or a straight buttonhole as in the above-mentionedpatents and in addition may be operated to sew an imitation but tonhole,-this latter being simply one row of buttonhole stitches, as will be formed along one side only of the buttonhole.

Another feature ofthe invention relates to certain improvements by which the buttonhole may be sewed not only with an eye at the end but may be sewed around the end without forming the eye. h

In order to'give an understanding of" my. invention I have illustrated in the drawings a selected embodiment thereof which will now be described after which the novel fea: tures will be pointed out in the appended claims. 4

forming an imitation buttonhole;

Fig. 1 is a side view of a sewing machine embodying my invention;

Fig. 2 is an under side plan view;

Fig. 3 is a fragmentary view of the de vices for controlling the operation of the stitch-forming mechanism to form either a buttonhole with an eye, a straight buttons hole or an imitation buttonhole; v

Fig. 4 is a top plan view of the parts shown a in Fig. 3 with them set "in position to form a straight buttonhole; i

Fig. 5 is asimilar view showing in full lines the parts set in position to form a buttonhole with an eye and in dotted lines set for 05 Fig. 6 is a fragmentary view showing the clutch for operating the "stitch-forming mechanism and the means for disengaging the clutch;

Fig. 7 is asimilar view showing the clutch disengaged;

Fig. 8 is a view illustrating a straight buttonhole Fig. 9 is a view illustrating a buttonhole with an eye; Fig. 10 is a view illustrating an imitation buttonhole;

, Fig. 11 is'a view illustrating a buttonhole sewed around the end but without the eye; Fig. 12 is a fragmentary sectional view illustrating the means for giving the relative lateral movement to the stitch-forming mechanism and work-holding meansv for forming the eye;

Fig. 13'isa similar view showing the parts adjusted for forming the type of buttonhole shown in Fig. 11;

Fig. 14 is a section on the line 1414;, Fig. 13;

Fig. 15 is a fragmentary view showing the operation of the dog for resetting the clutch;

Fig. 16 is a fragmentary view showing the carrier 52.

- Buttonhole sewing machines are commonly constr'ficted sothat in sewing a buttonhole in material 1 the sewing will start at one end 2 of the buttonhole slit 3 and will proceed along one side of the buttonhole to the oppo site'end thereby to form the stitches 4 and V will the p d al g the pposite side 199 the end are constructed so that the stitchforming mechanism can rotate about a vertical axis and if a buttonhole With an eye 6 is to be formed as shown in Fig. 9 then after stitching down one side of the buttonhole the stitchforming mechanism is turned through a half circleand at the same time the stitch-forming mechanism and work 1 are given a back and forth lateral movement thereby to form the stitches 7 around the eye 6. In case the buttonhole is not to have an eye but is to be a straight buttonhole, as shown in Fig. '8,

th'en the'stitch-forming mechanism will be rendered inoperative after forming the stitches 4 and while said stitch-forming mechanism is turning around the eye end of the buttonhole, the stitch-forming mechanism being started into operation again after making the turn thereby to form the stitches 5. i

The sewing machines illustrated in the above-mentioned Patents 1,497,215 and 1,532,301are constructed so as to sew the buttonhole either with or without the eye as shown in Figs. 8 and 9. The present improvement provides additional features by which the machine may be operated so as to sew a single line of buttonhole stitches 4 as illustrated in Fig. correspondingto the line of stitches along one side only of the buttonhole.

The form of stitching shown in Fig. 10 constitutes what is referred to as an imitation buttonhole and is frequently used in connection with buttons on the sleeve of a coat or in other places where buttons are used simply for ornamental purposes in order to give the appearance of a buttonhole.

This so-called imitation buttonhole is secured by the provision of means which'operate to render the stitch-forming mechanism inoperative after stitching down one side of the buttonhole 'and to maintain it inoperative during the remainder of the buttonhole cycle.

The complete buttonholecycle involves the relative movement of the stitch-forming mechanism to form the stitches on one side of the buttonhole, the turning of the stitchforming mechanism around the end of the buttonhole, and the relative movement between the stitch-forming' mechanism and work-holding means to return the parts to the original position. i

The main featuresofthe sewing machine herein illustrated are similar to those shown in United States Patents No. 655,637, August 7th, 1900 and No. 713,764, November 18th, 1902,as well as in the above-mentioned Patents No. 1,497,215 and No. 1,532,301.

The work to'be stitched is supported in usual work-holding means comprising the .clamp plates 8 which arepivotally mounted on a stationary bed plate 9 and'which operate to clamp the work against the bed plate. The stitch forming mechanism is of the usual type'comprising an upper and lower threadhandling mechanism. 'The upper threadhandling mechanism is in the formof a vertically-reciprocating needle 10 carried by a needle bar 11 which reciprocates in the overhanging arm 12 of a head or frame 13 that is mounted on the bed plate 9 so that it can move back andforth thereon and can also move laterally thereon. The under threadhandling mechanism (not shown) is carried on a turret 91 situated beneath the bed plate 9.

The stitch-forming mechanism including the turret and the needle bar 11 is arranged to be turned bodily about a vertical axis at each end of the buttonhole as usual in sewing machines of this type and as shown'in the above-mentioned patents. Thisturning movement is secured through a vertical rock shaft 14 which carries at its upper end a segmental gear 15 meshing with a gear 160 associated with the upper thread-handling mechanism, said rock shaft having a similar segmental gear 92 meshing with a gear 93 on the turret which supports the under threadhandling mechanism, all as shown in said Patent No. 655,637. This rock shaft 14 is turned at each end of the buttonhole thereby to give a, bodily turning movement to themovement being derived from a suitable main cam 16 situated in a cam housing17 which is rigid withthe head or frame 13 allas shown in theabove-mentioned patents. 7 i

The stitch-forming mechanism is driven from a shaft 18 by means of a pulley 19 which is loose thereon and which is clutched there to by a clutch of the type illustrated in said Patent No. 713,764 and which comprises a. clutch dog 20 (see Figs. 6 and 7), which is pivoted at 21 on a hub 22 which is fast on the shaft 18. The clutch dog 20 has a projection .23 formed thereon which is adapted to engage a suitable shoulder 24 formed on the pulley i ment of the tail 26 of the clutch dog so that as said tail engages the member 25 it will be turned about its pivot 21 as shown in Fig. 7 thereby withdrawing the projection 23 from the shoulder 24. j

The member 2-5 is yieldingly supported on a rocking member 27 which is mounted on a rock shaft 28 supported on the head 13, said member having rigid therewith a rearwardly-extend'ing arm 29. During the operation of the stitch-forming mechanism this rocking member 27 is held in its inoperative position shown in Fig. 6. by mea s of a latch 30 which is pivotally mounted at 31 on the head 13 and is adapted to engage a lug 32carried by the arm 29. When the member 27 is thus engaged by the latch the clutch disengaging member 25 will be held out of the path of movement of the tail 26 of the clutch dog.

The arm 29is acted upon by a suitable spring 33 which'tends to swing said arm ups wa-rdly therebyca'rrying. the-member 25 into.

the path of movement of the tail 26 of the clutch dog 20. When, therefore, the latchis released from the lug 32, as shown in Fig. 7, then the member 27 will be turned by the spring 33 thereby carrying the clutch-disengagmg member 25 into the path of movement member 25 of the tail 26 of the clutch dog thereby disengaging the latter and bringing the stitchforming mechanism to rest. P

Fig. 6, therefore, illustrates the positionof the parts when the stitch-forming mechanism is operating and Fig. 7 illustrates the position of the parts when the stitch-forming mechanism has been brought to rest.

Sewing machines of this type are usually provided with means for releasing the latch 30 from the lug 32 at the completion of the buttonhole and in the construction herein shown this is accomplished by a projection or shoulder 34 formed on the bed plate 9 and situated to be engaged by a screw 35 carried in the lower end of the latch 30 when the stitching on the buttonhole has been completed, said screw being brought into engagement with the rojection by the movement of the head or f i'ame 13 as the stitching 5 is being completed.

Means are herein provided similar to thatillustrated in Patent No. 1,497,215 by which the latch 30 may be disconnected from the projection 32 after the side stitches 4 along the first side of the buttonhole have been sewed thereby to allow the clutch-disengaging to disengage the clutch dog 20 from the shoulder 24 as shown in Fig. 7 with the result that the stitch-forming mechanism will cease to function while it is turning around the end of the buttonhole, which the clutch dog may be released there byto start the stitch-forming mechanism in operation again after it has turned around the end of the buttonhole so that the side stitches 5 on the buttonhole will be completed. Such means comprise an arm or lever 36 which,

with an inclined or cam face 48.

frame 27 and the projecting arm and by is pivotally mounted at 37 on a stand 38 that is secured to the stationary bed plate 9'. This arm or lever has a handle 39extending for- Y:

wardly therefrom by which it may be turned about its pivot. The handle carries a projection in the form of a screw 40 which is adapted to be brought into alignment with the upper end 41 of the latch 30 by a swinging movement of the lever 36. When the lever 36 is moved so that the projection 40 is in be disengaged. This screw 40 is adjusted so that the disengagement of the clutch will occur when the stitches 4 at the sides of the buttonhole have been completed and just before the stitch-forming mechanism begins to turn around the end of the buttonhole.

The device herein shown is also provided with means for causing the clutch dog 20 to be re-engaged with the -shoulder24 after. the stitch forminomechanism has swung around the eye of thebutton-hole so' that the stitching will start again and form the side stitching 5 on the buttonhole as shown in Fig. 8.

The portion 42 of the lever 36 which rests on the stand 38 has a dog member 43 pivoted thereto at 44,- said dog member being provided at its end with a laterally-extending finger 45. This finger normally rests on a curved spring plate 46 which is supported by the head 13. The arm 29, which carries the projection. 32, has at its end extending cam finger 47 which rovided ince the 'dog 43 is carried by the swinging lever 36 said dog will be moved laterally by the swinging movement of said lever. When the lever is in the position shown in Fig. 4 the finger 45 of the dog 43 is in line with the cam projection 47 but when the lever 36 is swung into the position shown in Fig. 5 the finger 45 of said dog 43 is out of line with-the cam projection 47. r

a It will be remembered that the swinging 29 are mounted on the moving head 13 and move back and forth with said head. During the forming of the stitches 4 on the buttonhole the head 13 is moving toward the rear of the frame Qor to the left in Fig. 3, and assuming that the lever 36 has been set for the forming of the straight buttonhole, as shown in Fig. 4, in which position the screw 40 is in line withtlie upper end 41 of the latch 30 and the finger 45 is in line with the cam projection 47, then as the line of stitching 4 is completed and just after the latch 30 has been released by the'projection40, the finger 45 of the dog 43 will ride up the inclined a laterallyface 49 of the resilient rest 46a nd will be crowded between the incline 49 and the projection 47 the finger and projection at this second side of the buttonhole, the finger45 will engage the cam face 48 and will ride over the projection 47.

The dog 43 is prevented from swinging upwardly during the time of its engagement with the cam face 48 by means of a stop pin 50 which is carried by the stand 38 and which extends through a lateral extension 51 rigid with the dog 43. When, therefore, the head 13 starts its return movement the engage ment of the finger 45 with the cam face 48 will re'sultin swinging the frame 27 downnwardly thus retracting the clutch-disengag-v member 25 from the tail of the clutch dog and allowing the clutch to be thrown into operation thereby setting the stitch-forming mechanism in operation again.

' The mechanism herein shown is constructed so that the latch-releasing screw 40 can be rendered-operative to release the latch and thus causethe clutch dog 20. to be disengaged either when the finger of the dog43 is in its operative .position, shown in-Fig. 4, or when it is in its inoperative position, as shown 1n Fig. 5. Under the former conditions a straight buttonhole; such as shownv in F g 8, will be formed. v Under the latter conditions an imitation butto'nhole,-such as shown in Fig. 10, will beformed, because 40under these latter conditions the latch 30 will be released to stop the stitch-forming mechanism frbm operating when the straight line of stitches 4 have been come pleted but the clutch will not be re-engaged and will remain disengaged during the entire return movement of the head 13.

v This is accomplished herein 'by mounting the pin 40 upon a swinging carrier 52 which ispivoted to the lever 36 at 53 so as topermit saidcarrier with the knock-off screw-40 to be swung from the full to the dotted line position Fig. 5, or from the full to the dotted line position Fig. 16.

When both the swinging lever 36 and the carrier 52 are in the full line position Fig. 5 then the parts are set for forming a button-v hole with an eye, as shown in Fig. 9, because the knock-off, screw 40 is out of line with the end 41 of the latch so'that the latch will not be released after the side stitching 4 has been completed, and the dog 43 is also out of line with the projection 47 If, however, while the lever 36 is in the position shown in Fig. 5 the carrier 52 is turned into the dotted line position, the knock-off screw 40 will then be swung into position to engagezthe upper end end of the buttonhole by reason of the fact that the dog 43 is out of line with the projection 47 and hence during the entire return movement of the head 13 the stitch-forming mechanism will be idle and the result will be that during the complete cycle of operations there will be formed simply a single line of buttonhole stitches 4 as shown in Fig. 10'.

The swinging carrier 52 may be yieldingly retained in either of its two positions by means of a spring pressed pin 54 which" is adapted to enter either one of two notches depending .on the position in which the carrier is'placed. 'The portion 42 of the lever 36 also carries a spring-pressed retaining pin 58 which is-adapted to drop into either one of two recesses formed in the stand 38 for yieldingly holding the lever 36 in either of the two positions shown-in Figs. 4 and 5. 60 indicates stop pins that serve to limit the swinging movement of the lever 36.

The machine herein shown is also constructed so that the sewing around the end of the buttonhole may be done either in such a way as to formthe eye 6, as shown in Fig. 9, or to forma'buttonhole without an eye, as shownin Fig; 11. The eye is formed in the usual way by giving the head 13 a lateralmovement while the stitch-forming mecha nism is turning around the end of the buttonhole. This lateral movement is secured through the medium of a lever 61 whlch has a follower 62 that is adapted to be engaged in a cam groove 63 formed in the main cam 16'. Said lever is fast on a post 64 journalled in suitable bearings-65 and the post has fast at ts upper. end an arm 66 carrying a shoe 67 which is receivedin a guidewayor groove 68 formed in the stationary bed 9.

The cam groove 63 is so designed that it will give the lever 61 a to and-fro swinging movement at the end of the buttonhole.

Since the shoe 67 is held firmly from lateral movement in the groove 68 in'the stationary bed plate 9 this swinging movement of the lever 61 will operate to give lateral movement to the head. 13, all as describedin the above mentioned patents.

I have provided herein means whereby the lever 61 may be, at the will of the operator,

rendered inoperative to give the head 13 its to-and-fro movement at the time that the stitching is being formed around the end of the buttonhole. This is accomplished herein by withdrawing the follower 62 from operative engagement with the cam groove 63 and simultaneously locking the lever 61 from swinging movement. When thisis done then the head 13 can only have a to-and-fro movement without any lateral vibration at the end of the buttonhole and the result will be that if the stitch-forming mechanism is in operation around the end of the buttonhole it will form stitches as shown at 69 in Fig. 11 thus producing a buttonhole stitched around the end but without the, eye. I

As herein shown the follower 62is in the form of a pin which is slidably mounted through the end of the lever 61 and is connected to a lever 7 O pivoted at 72 to the operatinglever 61. This lever 70 also has connected thereto an anchoring pin 73 which is adapted to engage in arecess 7 4 formed in the under side of the cam housing 17. The pins 62 and 73 are connected to the lever 70 on op-' posite'sides of its pivot 72 and,-therefore,

, when the lever is swung in one direction one 1)f the pins will be projected and the other will be withdrawn and, when the lever is swung in the opposite direction the position of thepinswill be reversed. .With the lever 70 in theposition shown in Fig. 12 the follower pin 62 will be projected upwardly into the cam groove 63 while the anchoring pin 7 3 will be withdrawn from its recess 74. On the other hand; when the lever 70 is swung into the position shown in Fig. 13, the fol-- .lower pin 62 is withdrawn from thegroove 63 and the anchoring pin is projected into the recess 74:. When the anchoring p'in'is thus in the recess 74the lever 61 will be held from lateral movement ahd the head, therefore, Izvill be permitted to move: only in a straight ine.

spring 7 5 which tends normally to hold the lever in the position shown in Fig. 12 and a spring latch 76 is provided for holding the leverin. the position shown in Fig. 13.

tonhole sewing machine the lever 70 will be in the position shown in Fig. 12 and if a but tonhole with an eye is to be made the lever 36 will. be moved into the position shown in Fig."

5 and the carrier 52 will be set in the full line position Fig. 5, If, however, a straight buttonhole such as shown in Fig. 8' is desired the lever 36 Will be moved into the position shown in Fig. 4 with the result above de- 55' scribed. Ifthe imitation buttonhole shown The lever is shown as acted on by a During the normal operation of the but-- 1 and worl'r-holding means,

around'the end and back to the point 2 again.

but the head 13 will have no lateral movement and,- therefore, no eye will be'formed at the end of the buttonhole.

I claim:

1. Ina buttonhole sewing machine having stitch-forming mechanism and work-holding means arranged to have a forward and return movement relative to each other during each buttonhole cycle and in which the stitch-forming mechanism has a bodily turning movement about a vertical axis at the end of the buttonhole, the combination withsaid stitchforming mechanism and work-holding means, of adjustable means adapted in one adjusted position to render the stitch-forming mechanism inoperative when the stitching has been completed on the first side of the buttonhole andv while the stitch-forming mechanism is turning around the end of the buttonhole,and to render the stitch-forming mechanism operative again afterit has made its half rotation, whereby a straight buttonhole is produced, and in another adjusted position to not only render the stitch-forming mechanism inoperative while itisturning around the end of the buttonhole, but also to main- .tain it inoperative throughout the remainder of the buttonhole cycle.

- 2. In a buttonhole sewing machine having stitch-forming mechanism and work-holding means arranged to have a relative forward and return movement during each buttonhole cycle; and in which the stitch-forming mechanism has a bodily turning movement about a vertical axis at the endof the buttonhole, the combination with said stitch- :Eorming mechanism and work-holding means, 7

of means to render the stitch-forming mechanism'inoperative when the stitching has been completed on the first side of the buttonhole and to maintain said stitch-forming mechanism inoperative during the remainder of the buttonhole cycle.

3. In a buttonhole sewing machine, the combination with stitch-forming mechanism of means to produces. forward and return relative movement between the stitch-forming mechanism and work-holding means during ,each but. tonhole cycle, and means to render the stitchformlng mechanism inoperative just before the completion of the forward relative movement and to mainta n said mechanism moperative during the ent re return movement.

4. In a buttonhole {sewing machine, the

combination with stitch-forming mechanism and Work-holdin g means, of means to produce a forward and return relative movement be tween the stitch-forming mechanism and work-holding means during each buttonhole cycle, and means actuated by said relative movement to render thestitch-forming mechanism inoperative just before the completion of the forward relative movement" and to maintain said'mechanism inoperative during the entire return movement.

5. In a buttonhole sewing machine having stitch-forming mechanism and work-holding means arranged to have a relative forward and return movement during each buttonhole cycle, the combination with said stitch-forming mechanism and work-holding means, of adjustable means operative at the end of the forward relative movement to render the stitch-forming mechanism inoperative, and

to render said mechanism operative again or to maintain it inoperative during the relative return movement depending on the adjusted position of the adjustable means.

6. In a buttonhole sewing machine having stitch-forming mechanism and work-holding means arranged to have a relative forward and return movementduring each buttonhole cycle, and in which the stitch-forming mechanism turns about a vertical axis at the end of the buttonhole, the combination with said stitch-forming mechanism and work-holding means, of adjustable means operated by said relative movement at the end of the relative forward movement to render the stitch-forming mechanism inoperative while the latter is turning around the end of the buttonhole, and to render the stitch-forming mechanism either operative again forthe return relative movement or to maintain it inoperative during such return relative movement depending upon the adjusted position of the adjustable means.

7. In a buttonhole sewing machine having stitch-forming mechanism and work-holding re-engagement of the clutch after the stitchforming mechanism has turned around the buttonhole and in another adjusted position to disengage the clutch after the stitching has been completed on the first side of the buttonhole and without causing re-engagement of the clutch during the remainder of the buttonhole cycle.

8. In a buttonhole sewing machine having stitch-forming mechanism and work-holding means arranged to have a forward and return relative movement during each buttonhole cycle, and in which thestitch-forming mechanism turns about a vertical axis at the end of the buttonhole, the combination with said stitch-forming mechanism and workholding means, of a clutch through which the stitch-forming mechanism is operated,

an automatically operative -c1utch-disengag-' ing member, a latch for holding the clutchdisengagingmember inoperative, and adjustable means operative in one adjusted position to release the latch when the first side of the buttonhole has been completed and then to cause re-engagement of the clutch after the stitch-forming mechanism has made its half rotation about the end of the buttonhole, and in another adjusted position to release the latch when the first side of the buttonhole hasbeen completed without causing re-engagement of the clutch during the remainder of the buttonhole cycle.

9. In a buttonhole sewing machine having stitch-forming mechanism and work-holding means arranged to have a relative forward and return movement during each sewing cycle and in which the stitch-forming mechanism turns about the end of the buttonhole,

the combination with said work-holding I means and stitch-forming mechanism, of

means whereby the operator can, at will,

cause the stitch-forming mechanism to cease operation while it turns about the end of the buttonhole, and to begin operation' again after such a turn or to cease operation at the end of the buttonhole and to remain inoperative during the remainder ofthe buttonhole cycle.

10. In a buttonhole sewing machine having stitch-forming mechanism and work-holding means arranged to have a forward and return relative movement during the buttonhole cycle and in which the stitch-forming mechanism turns around the end of the buttonhole, the combination with said stitch-forming mechanism and work-holding means, of a frame carrying said stitchforming mechanism, a cam mounted on the frame for giving the stitch-forming mechanism and workholding means said relative movement, means operated by said cam to give the stitch-forming mechanism and work-holding means a relative lateral movement while the stitchforming mechanism is turning around the end of the buttonhole, andmeans to render the last-named means operative or inoperative at the will of the operator and to lock said means to the frame when it is inoperative; 1

'11; In a buttonhole sewing machine having stitch-formin g mechanism and work-holding means arranged to-have a forward and return relative movement during the buttonhole cycle and in which the stitch-forming mechanism turns around the end of the buttonhole, the combination with said stitchforming mechanism and work-holding means, of a frame carrying the stitch-forming mechanism, a cam mounted on the frame for iving the stitch-forming mechanism and wor holding means said relative movement, means operated by the cam to give the stitchforming mechanism and work-holding operative means a relative lateral movement while the stitch-forming mechanism is turning about the end of the buttonhole, a controlling lever by which said last-named means is rendered or inoperative at the will of the operator and by which said last-named means is' looked to the frame when it is rendered inoperative.

12. In a buttonhole sewing machine having stitch-forming mechanism and work-holding means arranged to have a relative forward and return movement during each sewing cycle, andin which the stitch-forming mechanism turns about the end 0f-the buttonhole,

the combination wlth said stitch-forming mechanism and workholding means, of a frame carrying said stitch-forming mechanism, a lever for producing a relative lateral movement between the stitch-forming mechanism and work-holding means while the for lner. is turning about the end of the buttonhole, and means to render said lever inoperative atthe will of the operator and simultaneously to lock it to the frame thereby lockingmeans ing the stitch-forming mechanism and workholding means from relative lateral movement.

I 13. In a buttonhole sewing machine having H stitch-forming mechanism and work-holding means arranged tohave a'relative forward and return movement during the buttonhole-cycle and in which the stitch-formin mechanism turns about the end of the buttonhole, the combination with said stitchforming mechanism and work-holding means, of a frame carrying said stitch-form ing mechanism, a cam ournalled in the frame, a lever actuated by the cam for giving relative lateral movementto the work-holding means and stitch-forming mechanism while the latter is turning about the end of the buttonhole, and means to disengage the level from the cam'and simultaneously lock said lever to said frame thereby=1ocking the 'stitch-forming mechanism and work-holdfrom lateral movement. 7

14. In a buttonhole sewing machine having stitch-forming mechanism and workholding means arranged to have a relative forward and returnmovement during the buttonhole cycle and in which the stitchforming mechanism turns aboutthe end of the buttonhole, the combination with said stitch-forming mechanism and work-holding means, of a cam for producing said relative movement, a lever, a follower pin carried by the lever andengaging the cam, means whereby the cam-actuated movement of the lever produces a relative lateral movement between I the stitch-forming mechanism and workholding means, means to withdraw said follower pin from operative engagement with the cam, and means other than the follower pin to lock the pin is thus withdrawn.

the lever from mo vement while,

a follower pin carried by the I by said lever and connected to said last named means to be moved from its inoperative position to its operative position when" the follower pin is withdrawn, and means cooperating with the anchoring pin when in its operative position to lock the stitch-forming mechanism and work-holding means from relative lateral movement.

In testimony whereof, name to this specification.

JOHN W. CONNOJRS.

I have signed my

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