US1083896A

US1083896A - Buttonhole-stitching machine.

Info

Publication number: US1083896A
Application number: US70055112A
Authority: US
Inventors: John Kiewicz
Original assignee: Reece Button Hole Machine Co
Current assignee: Reece Button Hole Machine Co
Priority date: 1912-05-31
Filing date: 1912-05-31
Publication date: 1914-01-06
Anticipated expiration: 1931-01-06

Description

J. KIEWIOZ.

BUTTONHOLE STITGHING MACHINE.

APPLICATION FIL-ED MAY 31, 1912. 1,083,896. Patented Jan. 6, 1914.

4 SHEETSSHBET 1.

J. KIEWIOZ.

BUTTONHOLE STITGHING MACHINE.

APPLICATION FILED MAY 31, 1912.

Patented Jan. 6, 1914,

4 SHEETS-SHEET 2.

COLUMBIA FLANUURAPH C0-. WASHINGTON. D. C

Patented Jan. 6, 1914.

4 SHEETS-SHEET 3 Jv'zve 757an zfaewn J. KIEWICZ.

BUTTONHOLE STITOHING MACHINE.

APPLICATION FILED MAY 31, 1912.

J. KIEWIOZ. BUTTONHOLE STITGH-ING MACHINE.

APPLICATION FILED MAY 31, 19-12.

Patented J an. 6, 1914.

4 SHEETS-SHEET 4.

TED STATES PATENT OFFICE.

JOHN KIEWICZ, OF BOSTON, MASSACHUSETTS, ASSIGNOR- TO THE REECE BUTTON HOLE MACHINE COMPANY, MAINE.

0F BOSTON, MASSACHUSETTS, A CORPORATION OF BUTTONHOLE-STITCI-IING MACHINE.

To all whom it may concern: I

Be it known that I, JOHN Kmwrcz. a citizen of the United States, residing at Boston, county of Suffolk, State of Massachusetts, and whose post-ofiice address is No. .1 Tileston street, Hyde Park, Massachusetts, have invented an Improvement in Buttonhole Stitching Machines, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to buttonhole stitching machines of the Reece type, such as are exemplified in United States Patents No. 655,637, August 7, 1900, No. 713,76 1, November 18, 1902, and in my Patent No. 1,030,589, dated June 25, 1912.

The principal object of the present inven tion is to provide a sewing machine of this type with a barring attachment that can be thrown into or out of operation at the will of the operator whereby buttonholes either with or without the barring stitches can be produced according to the requirements of use.

More particularly, my invention has for its object to provide a barring attachment of this nature which is so constructed that the final stitches which are made during the operation of stitching a buttonhole may be either in the nature of barring stitches or may be in the nature of over-edge stitches, depending on whether the barring attachment is in its operative or inoperative position.

Further objects of my invention are to improve buttonhole-stitching machines of the above-mentioned type, all as will be more fully hereinafter described and then pointed out in the appended claims.

In some sewing machines of the Reece type, the work clamp is stationary and the upper and under stitch-forming mechanisms are mounted on a movable stitch frame which moves backward and forward, said Specification of Letters Fatent.

Application filed May 31, 19.12.

Patented Jan. 6, 1914.

Serial No. 700,551.

return the parts to their initial position. Examples of such machines of this type are to be found in the above-mentioned Patents No. 055,637, and No. 713,704. In another type of Reece sewing machine the required relative movement between the work clamp and the stitch-forming mechanism secured by moving the work clamp, the stitch-forming mechanisms being fixed in position. An example of this type of machine is shown in my Patent No. 1,030,589.

My present invention is capable of appli cation to either type of sewing machine, but I have deemed it sufficient to illustrate it as it would be applied to one only of these types, and I have chosen herein to show it as applied to the type of machine wherein the work clamp is movable and the stitch frame is stationary.

In the drawings, therefore, I have illustrated the invention as it would be applied to a machine such as is shown in my Patent No. 1,030,589, but I desire to state that the invention is not limited in its application to this particular type of buttonhole-stitching machines.

In the drawings, Figure 1 is a side view of a portion of a sewing machine, such as shown in my Patent No. 1,030,589, having my improvements applied thereto; Fig. 2 is a plan view of the controlling means for the clutch of the main driving shaft by which the stitching mechanism is operated; Fig. 3 is an under side plan view of the sewing machine such as illustrated in my Patent No. 1,030,589 and having my improvements applied thereto; Fig. L is an enlarged section on the line a-a, Fig. 3; Fig. 5 is a righthand side elevation and partial longitudinal section through the bed plate and some of the devices mounted thereon for controlling the operation of the work clamp and the stitch-forming instrumentality; Fig. 6 is a fragmentary detail view showing some of the parts illustrated in Fig. 5 in another position; Fig. 7 is a plan view of the controlling means for the barring attachment; Fig. 8 is a side view of the feed ratchet for operating the feed shaft; Fig. 9 is a perspective view of one of the feed pawls; Figs. 10 and 11 are sections on the lines Z Z) and cc, respectively, Fig. 8; Figs. 12, 13, 14-. and 15 are fragmentary detail views showing the operation of the barring attachment; Fig. 16 is a fragmentary sectional view showing the position of the clutchdisengaging means for the main driving shaft at the time when the stopping of said driving shaft is initiated; Fig. 17 is a sectonal view on the line (Z(Z, Fig. 3; Fig. 18 is a sectional view on the line 6 c, Fig. 15.

The work-feeding and stitch-forming instrumentalities of the machine herein shown are similar in their main features to those devices as shown in the above-mentioned patents, and inasmuch as my present invention relates principally to the means for making the barring stitches at the end of the operation of stitching the buttonhole, I do not regard it as necessary to give a minutely-detailed description of the stitchforming mechanism.

Referring briefly to the mechanism which is common to said patents, A designates the bed plate which is sustained in usual manner upon the housing or curbing A A represents the overhanging arm of the stitch frame which carries the upper stitchforming mechanism comprising the usual needle A and needle bar A A is the main driving shaft by which the stitch-forming instrumentalities are operated and which is driven from a pulley f loosely mounted on the shaft and which is connected to the shaft by a clutch mechanism, such as shown in said Patent No. 713,764, and which includes a clutch dog (Z provided with a tail (Z This clutch is disengaged when the stitching operation is completed by means of a stop lug a which is carried by an arm a mounted on a shaft (t. hen the stitching mechanism is in operation the lug a is withdrawn from the path of the tail of the clutch dog (Z but when the stitching operation is completed the arm is thrown forwardly to bring the lug into the path of movement of the tail (Z thus disengaging the clutch, all as more fully set forth in the abovementioned patents.

The under complemental stitch-forming mechanism is shown generally at 1. This and the upper stitch-forming mechanisms are given a semi-rotation in stitching around the eye end of the buttonhole by means of the two sectors A and A mounted on the rock-shaft A said rock shaft being operated at the proper time by mechanism such as shown in my Patent No. 1,030,589, and which comprises an arm A extending laterally from the shaft A", see Fig. 3, and connected by a link B with a lever 13 that is pivoted at B to the bed plate and is pro vided with a. roll B operating in a cam groove B formed in a feed cam B. The cam B is driven from the worm B on the feed shaft B as usual in this class of devices.

The work is held in position by a work clamp, such as is shown in my Patent No. 1,030,589, and which comprises an under clamping member 31 and an upper clamping member 54, these parts being operated to clamp the work between them in a wellknown manner. The lower clamping member 31 is herein shown as movably mounted on the bed plate A, as shown in my said Patent No. 1,030,589, and during the op eration of stitching the buttonhole this work clamp is moved forwardly and backwardly relative to stitch-forming mechanism during the stitching of the sides of the buttonhole and it is moved laterally in stitching around the eye end of the buttonhole. The fore-and-aft movement of the clamping member is secured by mechanism similar to that shown in said Patent No. 1,030,589 and which comprises a work clamp controlling member 80 movably mounted in the underside of the bed plate, which member is detachably connected to the clamp member 31 and is provided with a depending roll or stud 83 which enters a groove in the top of the feed cam, B, whereby rotation of the cam governs the fore-and-aft sliding move ment of the controlling member 80 and work clamp.

As usual in machines of this class the feed cam B is first given a quick movement to effect the feeding of the work into position for receiving the buttonhole stitches, and then it is given a slower feeding movement during the stitching operation, said cam subsequently having another rapid movement after the stitching operation is completed to return the work clamp to its initial position. The quick feeding movement is derived from the driving pulley a which is loosely mounted on the shaft 13 but is adapted to be clutched thereto by a clutch member a which is controlled by the T-shaped lever a all as shown in my Patent No. 1,030,589. The slow feeding movement of the main cam is derived from the main driving shaft A all as shown in said Patent No. 1,030,589, and for this purpose said shaft has thereon an eccentric 0 operating in a yoked arm 46 pivoted on the shaft a and having connected thereto a link C leading to a lever C pivoted at C and connected at its lower end to a pawlcarrier 96 loosely mounted on the feed shaft 13 and carrying pawls 99 that engage a feed ratchet C fast on said shaft B The T- shaped clutch-controlling lever c is oper ated automatically at the time when the initial forward feeding movement of the work clamp is completed to bring the work a into position for the stitching operation thereby to throw the high speed mechanism out of operation, this occurring simultaneously with the clutching of the pulley f to the main driving shaft A to start the stitching operation. The work clamp is also given a lateral movement in rounding the eye end of the buttonhole by means which are somewhat similar to the corresponding devices shown in Patent No. 1,030,589. The clamp plate 31 is provided in its under side with a groove in which is received a member 13 which is capable of having a lateral movement, such lateral movement being communicated to the work clamp. This member 13 has rigid therewith a member t which is provided at one end with a portion 5 that operates in a suitable guideway 6 and at the other end with a portion 16 operating in a guide slot formed in the edge of the bed plate A, said slot and guideway 6 guiding the member t in its lateral movements. This member at is acted upon by a spring 7 which tends to move said member and consequently the work clamp upwardly looking at Fig. 3. The member 4t has pivotally connected thereto at 9 an arm 8 provided with a flange 10, the flange 10 engaging an adjustable stop 12 carried by the lug 1 1 on the member 4, and the flange 1.0 being engaged by a stud 11 adjust-ably carried on a lever 24L pivoted at 25 to the bed plate and provided at one end with a stud 26 operating in a cam groove 28 in the cam B, (see Figs. 3 and 17). hen the lever 2 L is moved by the cam 28 the stud 11 engages the flange 10 and the motion of the lever is communicated to the member t through said flange 10 and the stop 12. The return movement of the member 4 is effected by the spring 7. The adjustability of the stop 12 and stud 11 provide means for adjusting the parts.

The mechanism thus far described is substantially the same as that shown in my Patent No. 1,030,589 and its operation in stitching the buttonhole is as follows: The work is placed in the work clamp and the machine is then started in usual manner. The first movement is to move the work clamp with a quick movement to bring the work into position to be operated on by the stitching mechanism, and during this time the feed shaft B is operated from the driving pulley a thereon. When the work is properly positioned relative to the stitchforming mechanism the driving pulley a is disconnected from the feed shaft B and at the same time the pulley f is clutched to the main driving shaft A, thus setting in operation the stitch-forming instrumentality and the slow-feed mechanism for the feed shaft B whereby the work clamp is fed slowly out and back as the stitching proceeds down one side of the buttonhole, around the eye end thereof, and back down the other side of the buttonhole, it being understood that during the rounding of the eye end the work clamp is moved laterally by mechanism above described and at the same time the stitching mechanism is given a semi-rd tation by means of the sectons Al and A The length of the buttonhole is controlled by a cam bar if", all as described in my Pattent No. 1,030,589, said cam bar being adjustably secured to the feed clamp carrier 80 by means of a screw 1080. This cam member has, therefore, a fore and-aft movement with the work clamp and is provided at its front end with an incline 10-10. The parts which cooperate with the cam bar in limiting the movement of the work clamp and comprising the radius bar 9, the notched lever 9 both carried by the arm f fast on the shaft a, the arm f also fast on the shaft .1 and provided with the lug 32* which is adapted to be en aged by the latch f when the pulley f is clutched to the shaft thereby to hold the arm a in its inoperative position and the arm a integral with the arms f, and which controls the clutchcontrolling lever a similar to the construction shown in my Patent No. 1,030,589, and as these of themselves form no part of the invention, I have not deemed it necessary to further describe them except to say that when the work clamp moves forwardly to position the work for the stitching operation the engagement of the inclined face 104t0 with the roll will rock the shaft a, thus swinging the arm a. to carry the stop lug (6 out of engagement with the clutch dog (Z thereby permitting the driving pulley P to be clutched to the shaft a and at the same time swinging the arms f, f so that the latch f" will engage the lug 32* and lock the parts in this position, this movement of the shaft (4 also operating through the arm a to actuate the clutch lever a and disengage the clutch a, while when the work clamp is completing its backward movement during the formation of the last stitches the latch f is released from the lug 32*. In the machine shown in my Patent No. 1,050,589 this releasing of the latch 7 from the lug 32* will allow the spring f to swing the shaft a thereby to bring the stop lug a into the path of movement of the tail (3' of the clutch dog (Z thus stopping instantly the stitch-forming instrumentalities, and this same movement of the shaft a will swing the arm a thereby permitting the clutch-controlling lever as to operate and throw the clutch 0: for the high speed feed mechanism into operation. In the present invention, however, the release of the latch f from the lug 232* does not immediately effect the disengagement of the clutch dog (5 and the consequent stopping of the stitch-forming mechanism, but initiates this stopping operation, the mechanism being so constructed that a predetermined number of stitches are formed after the latch f is disengaged from the lug 32 and before the mechanism is finally brought to rest. These predetcrn'iined number of stitches which are the last stitches in the formation of the but tonhole may either be in the nature of bar ring stitches, or in the nature of edge stitches, depending on whether or not the barring mechanism is thrown into operation. The provision for thus forming the predetermined number of stitches between the time when the latch f is released from the lug 32* and the complete stopping of the driving shaft A. is provided for by means shown best in Figs. 1, 2 and 3. The shaft A has fast thereon a member 60 which is shown as provided with a spiral groove 61 which terminates at its outer end in a recess 62. The arm a has journaled thereon a finger which is capable of swinging laterally, this being provided for by mounting the finger on a shaft 51 which is sustained in bearings 52 carried by the arm a.

55 is a spring, one end of which engages one of the bearings and the other end of which engages a finger 54 on a collar 53 carried by the shaft 51, said spring tending normally to swing the finger 50 toward the pulley 7' into the dotted line position shown in Fig. 2. This is the normal position of the finger 50 while the machine is in operation. lVhene-ver the latch f is disengaged from the ing 32*, the arm (4 tends to swing forwardly under the influence of the spring f and when the finger 50 is in its normal position, shown in dotted lines, Fig. 2, this forward movement brings the end thereof against the member and into one end of the spiral groove 61. The length of the finger 50 is such that when it is occupying the groove 61 in the member 60, the arm a is prevented from moving forwardly sufiiciently to bring the stop lug into the path of the tail (1' of the clutch dog (Z as clearly seen in Fig. 16, and, therefore, so long as the finger 50 is in engagement with the member 60, the stop lug 65 is inoperative to disengage the clutch from the driving pulley 7. 21s soon as the finger 50 engages the groove 61, however, the continued rotation of the driving shaft A and the member 60 carries the finger 50 along the spiral groove 61 until finally the recess 62 comes into line with the finger 50, and when this occurs the finger will drop into the recess thereby bringing the stop lug a into position to engage the tail (i of the clutch dog (Z and disengage the clutch for the driving shaft. This member 60 may be constructed so that any desired number of stitches will be taken after the latch f is disengaged from the lug 32 and before the finger 50 finally enters the recess 62, this depending on the number of turns in the spiral groove 61. In the present embodiment there are four such turns, and consequently four stitches will be formed during this period, but as stated above, this number can be varied by merely varying the number of turns in the spiral groove 61. As stated above these stitches which are formed after the latch f is disengaged from the lug 32 may be in the form of barring stitches, or in the nature of ordinary edge stitches, depending on whether or not the barring mechanism is thrown into or out of operation, and this is a matter entirely under the control of the operator.

If it is not desired to form the barring stitches, then the latch will be disengaged from its lug 32*, by a stop member 103 which is movably carried by the cam bar .71 and is adapted to be thrown into or out of position to engage the latch f as the work clamp moves rearwardly. On the other hand, if barring stitches are desired, then the latch f is disconnected by a latchreleasing device 101 which is pivoted to the bed plate A at 110 and is provided with a laterally-extending finger 111 at its upper end to engage the latch f", said releasing member 101 being operated by the barring mechanism, as will be fully hereinafter described. The stop 103 is shown as pivoted at 105 to the cam bar 71 and is provided with the extension 106 which is adapted to be engaged by a controlling member 107 that is pivoted in the bed plate A. at 108 and is provided with a handle 109 by w iich it may be turned. l i hen the controller is in the position shown in Figs. 7, 13 and 15, then the stop 103 occupies a position out of line with the latch f and the stop will not, therefore, engage the latch when the work clamp moves rearwardly. lVhen, however, the controller is thrown into the dotted line position thereby to swing the stop 103 into the dotted line position, then said stop is thrown into a position to engage the latch f as the work clamp moves rearwardly. This swinging movement of the controller into the dotted line position also throws the barring mechanism out of engagement, as will be presently described.

The barring attachment is best seen in igs. 3 and 12 to 15 and it com arises means 'brate the work clamp laterally a sufficient distance to effect the formation of the barring stitches. This means is herein shown as barring cam 19 which is pivoted on a stud 20 fixed in the bed plate A and extending through a slot 112 in the portion 16 of the member 4:. The barring cam is provided with a cam face 18 adapted to engage a roll 17 carried by the member th- Said cam face is so shaped that when the barring cam is moved from the position shown in Fig. 14 to that shown in Fig. 13 the member 4 will be moved laterally carrying with it the work clamp, as will be readily understood. Wh n the barring cam swings back into the position shown in-Fig. let, the member at and the work clamp are moved in the opposite direction laterally by the action of the spring '7. This vibrating movement of the barring cam 19 is effected from a continuously-operating actuator herein shown as an arm as rigid with the forked member 16 that is operated by the cam C, see Fig. 5.

This continuously-moving actuator 48 is, therefore, an oscillating member and has a continuous oscillation, so long as the driving shaft A of the stitch-forming mechanism is in operation. The motion from the actuator 48 is communicated to the barring cam through a connecting member 21, and means are provided whereby this connecting member is maintained out of operative relation with the actuator 48 during the formation of the edge stitches, but is thrown into operative relation to the actuator whenever barring stitches are to be formed. This connecting member 21 is shown as pivoted to one end of the barring cam, as at 113, and is provided with a spring 49 which tends to hold it and the barring cam in the position shown in Fig. 15. The connecting member 21 is situated immediately beneath the bed plate A and it is provided with a shoulder 42 which is adapted to be engaged by the actuator 48 when an operative relation be tween the connecting member and oscillating actuator is established, but which is held out of the path of movement of the actuator when the inoperative relation is maintained.

In order to maintain the inoperative relation during the formation of the edge stitches I have provided a controlling finger 44 which is movable fore-ancbaft with the work clamp. Said controlling finger is secured to the cam bar it and depends through a slot 114 in the bed plate A. This finger 44 will thus have a fore-and-aft movement with the work clamp, but will not partake of any lateral movement thereof. The controlling member 21 is provided with a surface 22 with which the finger 44 has engagement when the inoperative relation between the oscillating actuator and the connecting member is to be maintained, said surface 22 terminating in a shoulder 23 which provides for a release of the connecting member from its engagement with the controlling finger at such time that the barring operation is to be commenced.

Fig. 15 shows the parts in the position which they occupy when the stitching on the buttonhole commences, and it will be noted that the controlling member 44 has suflicient engagement with the surface 22 to hold said connecting member with its shoulder 42 out of the path of movement of the actuator 48. As the stitching down the first side of the buttonhole proceeds, the work clamp and cam bar k move forwardly carrying the finger 44 into the dotted line position Fig. 15, and during the stitching down the opposite side of the buttonhole the finger will be moved back again to the full line position Fig. 15. During this entire time that said stitches are being formed this controlling finger 44 holds the connecting member 21 out of operative relation with the actuator 48. When, however, during the feeding movement of the work clamp and cam bar h the controlling finger 44 passes off from the shoulder 23, as seen in Fig. 14, then the spring 49 augmented by the action of the spring 92, which will be presently described, swings the connecting member to ward the actuator 48 and brings the shoulder 42 into the path of movement of the ac tuator. As soon as this occurs the next forward swinging movement of the actuator 48 will by engagement with the shoulder 42 move the connecting member 21 longitudinally into the position shown in Fig. 13, thus swinging the barring cam 19 and causing a lateral movement of the work clamp. When the actuator swings backwardly the connecting member moves with it under the influence of the spring 49, thus swinging the barring cam into the position shown in Figs. 14 and 15, and during this movement the spring 7 returns the work clamp to its initial position. The connecting member and barring cam will thus have a vibrating motion to effect the formation of barring stitches and such movement will continue while the finger 50 is operating in the spiral groove 61.

The parts are so timed that the latch f is disconnected from the lug 32 as soon as the controlling finger 44 passes off from the shoulder 23, and to insure that this shall occur, the releasing member 104 is provided. The connecting member 21 is formed with a tail 116 which is adapted to engage the lower end of the releasing member 104 when the connecting member is moved forwardly, as shown in Fig. 13, this operation swinging the upper end of the releasing member 104 backwardly thereby to release the latch f. During the first forward movement of the connecting member 21, therefore, the latch f will be released so as to insure the complete stopping of the stitch-forming mechanism after the completion of a number of stitches determined by the member 60, as above described. Means are also provided whereby when the stitch-forming mechanism is returned to its initial position after the completion of the barring stitches, such operation will establish an inoperative relation between the connecting member 21 and the actuator 48 and will maintain such inoperative relation until the controlling finger 44 has again come into engagement with the face 22. In this type of buttonh ole sewing machine the stitchforming mechanism is given a semi-rotation in passing around the eye of the buttonhole, and after the buttonhole is completed, and while the work is being moved into position to cut the buttonhole the stil'iclrforming mechanism is given a return semi-rotation to bring it into forming mechanism to restore it to its initial position results in effecting an inoperative relation between the connecting member 21 and the actuator 48. This is provided for by forming the lever B with a finger 117, the upper end of which is adapted to engage a projection 118 formed on the connecting member 21 whereby swinging movement of the lever B toward the center to effect the restoring of the stitch-forming mechanism to its initial position will positively swing the connecting member 21 into the position shown in Fig. 3 with the shoul der 42 out of the path of movement of e the actuator 48. This finger 117 will maintain its engagement with the lug 118 until the stitch-forming mechanism is turned in rounding the end of the buttonhole, and at such time the controlling finger 44 is in engagement with the face 22 of the connecting member, thus preserving this inoperative relation.

It is essential that there should be no feeding movement of the buttonhole during the formation of the barring stitches, and I have, therefore, provided means for automatically rendering the feeding devices inoperative when the barring mechanism is operative.- It will be remembered that the feeding of the work clamp during the formation of the side stitches is efiected by the pawls 99 mounted in the oscillating pawl carrier 96 and engaging the ratchet wheel C. To render the feed mechanism inoperative I have provided means for disconnecting the pawls and ratchet wheel at such time that the barring mechanism is operative. While this may be accomplished in various ways, I have herein illustrated for this purpose the following means: 90 represents a lever pivoted at 91 to a bed plate and having a portion 119, that embraces the connecting member 21, so that the connecting member and lever 90 must swing in unison with each other. This lever 90 is acted on by a spring 92 which normally tends to force it, as well as the connecting member 21, toward the actuator 48. The lever 90 is adapted to engage a plate 94 associated with the pawl-carrier 96 and provided with a guiding pin 95 extending laterally through and slidably mounted in the pawlcarrier, said pin being acted on by a spring 100 which tends to hold it in the position shown in Fig. 10. This plate 94 is Provided with pawl-raising pins 97 which are adapted to engage the inclined cam faces 98 of the pawls 99. WVhen the pins are withdrawn, as shown in Figs. 10 and 11, the pawls will have operative engagement with the ratchet C, but when the lever 90 is swung into the position shown in Figs. 13 and 14, then the plate 94 is moved inwardly, thus carrying the pins 97 against the cam faces 98 of the pawls and raising the pawls against their springs out of engagement with the feed ratchet C Since the lever 90 is connected with the connecting member 21, it will be clear that whenever the connecting member has operative relation with the actuator 48, the pawls will be held out of engagement with the feed ratchet C and, therefore, the feed mechanism becomes inoperative whenever the barring mechanism is thrown into operation. I have also provided means whereby whenever the stitching mechanism is finally brought to rest, the connecting member 21 will be thrown out of operative relation with the actuator 48 before the stitching mechanism is returned to its initial position, and this is provided for by a lever 120 pivoted at 121 and havin its upper end situated to be engaged by the finger 50 and its lower end in position to engage the laterallyprojecti ng end 119 of the lever 90 so that when the finger 50 has completed its outward swing into line with the recess 62, the lever 120 is turned thereby shifting the connecting member 21 sufficiently to dis engage the shoulder from the actuator 48 and also shifting the lever 90 sufficiently to permit the feed pawls-99 to again come into operative position.

As soon as the connecting member 21 is thrown out of operative relation with the actuator 48, then the spring 49 immediately restores the connecting member and the barring cam to the position shown in Fig. 15 and the spring 7 then immediately shifts the work clamp back to its initial position thereby bringing the buttonhole into the proper position to have the buttonhole out. The controlling member 107 is also provided with a stop portion 123 situated beneath the bed plate A so that when said controlling member is thrown into the dotted line position Fig. 7 the stop member 123 occupies the position shown in Fig. 12, in which position it engages the connecting member 21 and holds it out of operative relation with the actuator 48. This is the position the parts occupy when the barring mechanism is inoperative. The operation of throwing the barring mechanism into or out of operation, therefore, involves merely the swinging of the handle 109 from the full to the dotted line position Fig. 7 WVhen the barring mechanism is inoperative then the last few stitches of the buttonhole are in the nature of edge stitches, but when the barring mechanism is in operation, then these last few stitches are in the nature of barring stitches.

129 designates a spring which acts against the member 106 to throw it into the full line position shown in Fig. 7 when the controller is removed from engagement therefrom.

In the adjustment of the parts I will preferably so place the shoulder 23 relative to the stop 103 that the disengagement of the latch f by the stop 103 when barring stitches are not to be provided will occur at a point slightly in advance of that at which the controlling finger 4A passes off from the shoulder 23 and at which said latch f is re leased by the releasing member 104. I prefer to do this so that when no barring stitches are to be made the latch f will be released just before the completion of the buttonhole and while there are yet four or more side stitches to be taken so that said stitching operation will commence and end at th same point, while when the barring operation is to be accomplished the release of the latch f does not occur until the side stitching on the second side of the buttonhole has reached a point opposite where the stitches on the first side of the buttonhole began.

While I have herein illustrated a selected embodiment of my invention 1 do not wish to be limited to the constructional details shown as many of these may be changed in various ways without departing from the invention.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a buttonhole sewing machine the combination with stitch forming mechanism to form edge stitches and including a vibrating needle, of a work clamp, clamp-vibrating means adapted when operative to give the clamp a lateral movement at each stitchforming movement of the needle thereby to form barring stitches each of which is of greater length than the edge stitches, and means whereby said clamp-vibrating means may be rendered operative or inoperative at the will. of the operator during the formation of the last stitches of the buttonhole and without stopping the machine.

2. In a hnttonhole sewing machine, the combination with stitch-forming mechanism for the formation of edge stitches, of workvibrating means to give the work a lateral movement for each stitch-forming movementof the stitch-forming mechanism thereby to cause the formation of barring stitches each of which is of greater length than the edge stitches and means capable of actuation while the machine is in operation whereby said vibrating means may be rendered either operative or inoperative during the formation of the last few stitches of the buttonhole.

3. ln a buttonhole sewing machine, the combination with stitch-forming mechanism for forming edge stitches, of a work clamp, clamp-vibrating means to give the work clamp a lateral movement for each stitchforming movement of the stitclnforming mechanism thereby to effect the formation of barring stitches each of whlch is of greater length than the edge stitches and a controlling means capable of actuation at any time to render said barring mechanism either operative or inoperative.

4:. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, clamp-vibrating means to vibrate the work clamp laterally to effect the formation of elongated barring stitches, means to hold said clamp-vibrating means inoperative except during the formation of the last few stitches of the buttonhole, and other means capable of actuation while the machine is in operation to render said clamp-vibrating means operative or inoperative at the will of the operator during the formation of said remaining stitches.

5. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, a barring cam for giving the work clamp a suflicient lateral movement to effect the formation of barring stitches, and means under the control of the operator to render said barring cam operative or inoperative during the formation of the last few stitches of the buttonhole.

6. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, means to give the work clamp and stitch-formin g mechanism a relative fore-and-aft movement for the forma tion of the edge stitches, a barring cam for effecting relative lateral movement between the work clamp and stitch-forming mechanism sutlicient to form barring stitches, a device for giving the barring cam its operative movement and means under the control of the operator to render said device either operative or inoperative during the formation of the last few stitches of the but tonhole.

7. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, means to give the work clamp and stitch-forming mechanism a relative fore-and-aft movement for the forma tion of the edge stitches, a barring cam for effecting relative lateral movement betveen the work clamp and stitch-forming mecha nism suflicient to form barring stitches, a continuously-operating actuator, a connecting member for communicating motion from said actuator to the barring cam, and means to maintain an inoperative relation between said actuator and connecting member during the formation of the edge stitches while permitting an operative relation to be established after the completion of the edge stitches.

8. In a sewing machine, the combination with stitch-forming mechanism, of means to give the work and the stitch-forming mechanism a relative fore-and-aft feeding move ment for the formation of the edge stitches, a barring cam for effecting relative lateral movement between the work and the stitchforming mechanism suihcient to form barring stitches, a continuouslyoperating actuator, a connecting member for communicating motion from said actuator to the barring cam, means to maintain an inoperative relation between said actuator and connecting member during the formation of the edge stitches while permitting an operative rela tion to be established after the completion of the edge stitches.

9. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, means to give the work clamp and stitch-forming mechanism a relative fore-and-aft movement for the formation of he edge stitches, a barring cam for effecting relative lateral movement between the work clamp and stitch-forming mechanism sufficient to form barring stitches, a continuously-operating actuator, a connecting iember for communicating mot-ion from said actuator to the barring cam, and means associated with the work clamp to maintain an inoperat've relation between said actuator and connecting member during the forma tion of the edge stitches while permitting an operative relation to be established after the completion of the edge stitches.

10. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of feeding means to feed the work clamp fore and aft for the formation of edge stitches, a barring cam to give said work clamp sufficient lateral movement to effectthe formation of barring stitches, a continuously-operating actuator, a connecting member to communicate motion from said actuator to the barring cam, a controlling finger movable with the work clamp and cooperating with said connecting member to maintain inoperative relation between the connccting member and the actuator while forming the edge stitches, said finger releasing the connecting member after the completion of the edge stitches to permit the establishment of operative relation between said connecting member and actuator whereby barring stitches are formed.

11. In a butt-onhole sewing machine, the co abination with stitch-forming mecha nism, of feeding means to feed the work clamp fore and aft for the formation of edge stitches, a barring cam to give said work clamp sufficient lateral movement to effect the formation of barring stitches, continuously-operating actuator, a connecting member to communicate motion from said actuator to the barring cam, a controlling finger movable with the work clamp and cooperating with said connecting member to maintain inoperative relation between the connecting member and the actuator while forming the edge stitches, said finger re leasing the connecting member after the completion of the edge stitches, and automatically-operative means to establish an operative relation between the connecting member and actuator when said connecting member is released by the finger.

12. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, means to give the work clamp and stitch-forming mechanism a relative fore-andaft movement for the formation of edge stitches, a barring cam for effecting relative lateral movement between the work clamp and stitching mechanism sufficient to form barring stitches, a continuously-operating actuator, a connecting member for communicating motion from said actuator to the barring cam, a controlling finger to hold said connecting member out of operative relation with the actuator during a predetermined relative fore-andaft movement between the clamp and stitchforming mechanism while permitting operative relation to be established between said actuator and connecting member at the completion of such relative movement whereby barring stitches are subsequently formed.

13. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, means to give the work clamp and stitch-forming mechanism a relative fore-and-aft movement for the formation of edge stitches, a barring cam for effecting relative lateral movement be tween the work clamp and stitching mechanism sufiicient to form barring stitches, a continuously-operating actuator, a connecting member for communicating motion from said actuator to the barring cam, a controlling finger to hold said connecting member out of operative relation with the actuator during a predetermined relative fore-andaft movement between the clamp and stitchforming mechanism, said finger releasing the connecting member at the completion of such relative movement, and automaticallyoperative means to establish operative relation between the connecting member and actuator when the connecting member is released whereby barring stitches are formed.

14. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, means to give the work clamp a feeding movement for fornr ing edge stitches, a barring cam for giving the work clamp a lateral movement suificient to form barring stitches, a continuouslyoperating actuator, a connecting member for communicating motion from the actuator to the barring cam, a controlling finger movable with the work clamp. said connecting member having a face with which the controlling finger has engagement during a predetermined extent of movement of the work clamp whereby said finger holds the connecting member in inoperative relation with the actuator, said finger passing off from said face at the completion of such predetermined movement, and means to establish operative relation between the connecting member and actuator when said connecting member is released by the finger whereby barring stitches are formed.

15. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, means to give the work clamp and stitch-forming mechanism a relative fore-and-aft movement for the formation of edge stitches, a barring cam for giving the work clamp a lateral movement sufficient for the formation of barring stitches, a continuously-operating actuator, a connecting member for communicating motion from the actuator to the barring cam, means for rotating the stitch-forming mechanism during the stitching around the eye of the buttonhole and for restoring the stitch-forming mechanism to initial position at the end of the stitching operation, means actuated by the restoring movement of the stitchforming mechanism to effect an inoperative relation between the actuator and the connecting member, means to maintain such inoperative relation during the formation of the edge stitches and to establish an operative relation for the formation of barring stitches.

16. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, means to give the work clamp and stitch-forming mechanism a relative foreand-aft movement for the formation of edge stitches, a barring cam for giving the work clamp a lateral movement sufficient for the formation of barring stitches, a continuously-operating actuator, a connecting member for communicating motion from the actuator to the barring cam, means for rotating the stitch-forming mechanism during the stitching around the eye of the buttonhole and for restoring the stitch-forming mechanism to initial position at the end of the stitching operation, means actuated by the restoring movement of the stitchforming mechanism to effect an inoperative relation between the actuator and the connecting, member, means associated with the work clamp to maintain such inoperative relation during the formation of the edge stitches, and automatically-operative means to establish an operative relation between the actuator and connecting member for the formation of barring stitches.

17. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, means to give the work clamp and stitch-forming mechanism a rela tive fore-and-aftmovement for the formation of edge stitches, a barring cam for giving the work clamp a lateral movement suflicient for the formation of barring stitches, a continuously-operating actuator, a

connecting member for communicating motion from the actuator to the barring cam, means for rotating the stitclrforming mechanism during the stitching around the eye of the buttonhole and for restoring the stitchforming mechanism to initial position at the end of the stitching operation, means actuated by the restoring movement of the stitchforming mechanism to effect an inoperative relation between the actuator and the connecting member, a controlling finger movable with the work clamp and operating to maintain such inoperative relation during a predetermined fore-and-aft relative movement of the work clamp and stitch forming mechanism and to release the connecting member at the end of such movement, and automatically-operative means to establish an operative relation between the actuator and connecting member whereby the latter is released.

18. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of means to produce a relative feeding movement between the work and stitclrforming mechanism for the formation of edge stitches, a barring cam for establishing a relative lateral movement between the work and stitclrforming mechanism sutlicient for the formation of barring stitches, a continuously-operating actuator, a connecting member for communicating motion from the actuator to the barring cam, means for rotating the stitch-forming mechanism while stitching around the eye of the buttonhole and for restoring said stitch-forming mechanism to initial position at the end of the stitching operation, means actuated by the restoring movement of the stitch-forming mechanism to effect an inoperative relation between the actuator and the connecting member, a c0ntrolling finger moved by said feeding means, said connecting member having a face with which the controlling finger has engagement during a predetermined feeding movement whereby said finger holds the connecting member in inoperative relation with respect to the actuator, said finger passing off from said surface at the completion of said feeding movement, and automatically-operative means to establish an operative connection between the actuator and connecting member when the latter is released by said finger whereby barring stitches are formed.

19. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a driving shaft therefor, feeding means to feed the work for the formation of edge stitches, means to operate said feeding means from the driving shaft, means to vibrate the work laterally for the formation of barring stitches, means to render said vibratingmeans either operative or inoperative and means to render the feeding means inoperative during the barring operation.

20. In a buttonhole-stitching machine, the combination with stitch-forming mechanism, of a driving shaft therefor, a feed shaft for feeding the work for the formation of edge stitches, a ratchet thereon, pawls operated by the driving shaft and actuating said ratchet, means rendered operative at a predetermined point in the feeding movement to effect the formation of barring stitches, and means to render the pawls inoperative when the barring stitches are being formed.

21. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, feeding means to feed the work clamp fore and aft for the formation of edge stitches, a barring cam to give said work clamp a lateral movement to effect the formation of barring stitches, a continuously-operating actuator, a connecting member to communicate motion from the actuator to the barring cam, a controlling finger movable with the work clamp and cooperating with the connecting member to maintain inoperative relation between the connecting member and actuator while forming the edge stitches, said finger releasing the connecting member after the completion of the edge stitches to permit the establishment of operative relation between said connecting member and actuator whereby barring stitches are formed, and means to render the feeding means inoperative at the time said operative relation is established.

22. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, feeding means to feed the work clamp fore and aft for the formation of edge stitches, a barring cam to give said work clamp a lateral movement to effect the formation of barring stitches, a continuously-operating actuator, a connecting member to communicate motion from the actuator to the barring cam, a controlling finger movable with the work clamp and cooperating with the connecting member to maintain inoperative relation between the connecting member and actuator while forming the edge stitches, said finger releasing the connecting member after the completion of the edge stitches to permit the establishment of operative relation between said connecting member and actuator whereby barring stitches are formed, and means controlled by the connecting member to render the feeding means inoperative when such operative relation is established.

23. In a buttonhole, sewing machine, the combination with stitch-forming mechanism, of a. driving shaft therefor, a work clamp, a feed shaft for giving the work clamp a feeding movement, means to operate the feed shaft from the driving shaft, a

esse barring cam for giving the work clamp sufficient lateral movement to effect the for mation of barring stitches, an actuator operated by the driving shaft, a connecting member to communicate motion from the actuator to the barring cam, means to maintain an inoperative relation between the connecting member and actuator during a predetermined movement of the work clamp, said means releasing the connecting member at the end of such movement, means to establish an operative relation between the actuator and connecting member when the latter is released whereby barring stitches are formed, and means to render inoperative the driving means for the feed shaft when such operative relation is established.

2%. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a driving shaft therefor, a work clamp, a' feed shaft for giving the work clamp its feeding movement, a ratchet on the feed shaft, pawls operated by said driving shaft. for actuating the ratchet, a barring cam for giving the work clamp sufficient lateral movement to effect the formation of barring stitches, an actuator actuated by the driving shaft, a connecting member to communicate motion from the actuator to the barring cam, means to maintain an inoperative relation between the actuator and connecting member during predetermined movement of the work clamp, said means releasing the connecting member at the end of such movement, means to establish an operative relation between the actuator and connecting member when the latter is released whereby barring stitches are formed, and means to disconnect the pawls from the ratchet when such operative relation is established.

25. In a buttonhole sewing machine, the combination with stitch-forming mechanism for forming edge stitches, of means for producing relative feeding movements between the stitch-forming mechanism and the work, barring mechanism including means for vibrating the work and give the latter a vibratory. movement for each stitch-forming movement of the stitch-forming mechanism thereby to increase the length of each stitch sufficient to constitute barring stitches, a controlling device accessible to the operator at all times and means actuated thereby to render the barring mechanism operative or inoperative at will.

26. In a buttonhole sewing machine, the combination with stitch-forming mechanism including a vibratory needle for forming edge stitches, of means for producing relative feeding movements between the stitchforming mechanism and the work, barring mechanism including means for vibrating the work and give it a lateral movement at each of the stitch-forming movements of the stitch forming mechanism thereby to increase the length of each stitch suflicient to constitute elongated barring stitches and means under the control of the operator and capable of actuation at any time during the operation of the machine to render the barring mechanism operative or inoperative at will.

27. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of actuating means therefor including a clutch, clutch-disengaging means for disengaging the clutch at the end of the stitching operation, said means including a device to initiate the clutch disengaging movement and then to complete such movement after the formation of a predetermined number of stitches, and means under the control of the operator for causing said predetermined number of stitches to be either in the nature of edge stitches or barring stitches.

28. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of driving means therefor including a clutch, clutch-disengaging means, barring mechanism, means to maintain the barring mechanism inoperative during the formation of the edge stitches and to render said barring mechanism operative when the edge stitching is completed, said latter means initiating the disengagement of the clutch, and means to prevent the clutch-disengaging means from operating to completely disengage the clutch until after a predetermined number of barring stitches have been formed.

29. In a buttonhole sewing machine, the combination with stitch-forming mechanism for forming the edge stitches of the buttonhole, of barring mechanism for causing the stitch-forming mechanism to efi'ect the formation of barring stitches, said barring mechanism comprising means to give the work a lateral vibratory motion, means for maintaining said. barring mechanism inoperative during the formation of all but the last few stitches of the buttonhole, auto- 1natically-operative means to render said barring mechanism operative during the formation of said last few stitches, and means under the control of the operator for holding said automatiCally-operative means inoperative.

80. In a bntonhole sewing machine, the combination with stitch-forming mechanism including a vibrating needle, of workvibrating means tuned to give the work a lateral movement at each stitch-forming movement of the needle, thereby to cause the formation of a plurality of elongated barring stitches, and means separate from the work-vibrating means by which the latter may be rendered either operative or inoperative during the formation of the last few stitches of the buttonhole.

31. In a buttonhole sewing machine, the combination with stitch-forming mechanism including a vibrating needle, of a work clamp, clamp-vibrating means to give the work clamp sufficient lateral vibratory movement at each stitch-forming movement of the needle to effect the formation of an elongated barring stitch, means to hold said clamp-vibrating means inoperative except during the formation of the last few stitches of the buttonhole, automatically-operative means to render said clamp-vibrating means operative during the formation of said last few stitches, and means under the control of the operator to prevent or permit the opera tion of said automatically-operative means.

82. In a buttonhole sewing machine, the combination with stitch-forming mechanism including a vibrating needle, of a Work clamp, clampvibrating means to give the work clamp suflicient lateral vibratory movement at each stitch-forming movement of the needle to effect the formation of an elongated barring stitch, means to hold said clamp-vibrating means inoperative except during the formation of the last few stitches of the buttonhole, and other means separate from the clamp-vibrating means to hold the latter inoperative or permit it to operate at the will of the operator during the formation of said last few stitches.

33. In a buttonhole sewing machine, the combination with stitch-forming mechanism including a vibrating needle, of a work clamp, a normally inactive barring cam for giving the work clamp a suflicient lateral vibratory movement at each stitch-forming movement of the needle to effect the formation of an elongated barring stitch, and

means to render said cam active during the formation of the last few stitches.

341:. In a buttonhole sewing machine, the combination with stitch-forming mechanism including a vibrating needle, of a work clamp, a normally stationary barring cam for giving the work clamp a sufficient lateral vibratory movement at each stitchforming movement of the needle to effect the formation of barring stitches of sufficient length to extend from one to the other side of the buttonhole, and means to actuate said barring cam during the forn'iation of the last few stitches of the buttonhole whereby barring stitches are formed.

35. In a buttonhole sewing machine, the combination with stitch-forming mechanism including a vibrating needle, of a work clamp, a normally inactive oscillatory barring cam for giving the work clamp sufficient lateral vibratory movement at each stitch-forming movement of the needle to effect the formation of barring stitches of sufficient length to extend from one to the other side of the buttonhole, and means to oscillate said cam during the formation of the last few stitches of the buttonhole whereby barring stitches are formed.

36. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, means to give the work clamp and stitch-forming mechanism a relative feeding movement for the formation of the ed e stitches, a normally idle barring cam, and means operative during the formation of the last few stitches of the buttonhole to actuate said cam thereby to give the work clamp and stitch-forming mechanism a sufficient relative lateral vibratory movement to effect the formation of barring stitches which extend from one to the other side of the buttonhole.

37. In a buttonhole sewing machine, the combination with stitch-forming mecha nism, of a work clamp, means to give the work clamp and stitch-forming mechanism a relative feeding movement for the formation of the edge stitches, a normally idle barring cam, means operative during the formation of the last few stitches of the buttonhole to actuate said cam thereby to give the work clamp and stitch-forming mechanism a sufficient relative lateral vibratory movement to effect the formation of barring stitches, and means to render the feeding mechanism inoperative during the formation of the barring stitches.

38. In a buttonhole sewing machine, the combination with stitch-forming mechanism including a vibrating needle, of a work clamp, clamp-vibrating means to give the work clamp sui'ficient lateral vibratory movement at each stitch-forming movement of the needle to effect the formation of barring stitches, means to hold said clamp-vibrating means inoperative except during the formation of the last few stitches of the buttonhole, and a movable controller which in one position renders said clampvibrating means inoperative during the formation of said last few stitches and in another position permits said means to operate.

39. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, means to give the stitch-forming mechanism and the work clamp a relative feeding movement, clampvibrating means to give the work clamp sufficient lateral movement to effect the formation of barring stitches, said means including an oscillatory barring cam, a vibrating arm, and a connecting member to communt cate motion from said arm to said cam.

10, In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, means to give the stitch-forming mechanism and work clamp a relative feeding movement, a normally inactive oscillatory barring cam, a member connected to the work clamp and having a portion engaging said cam, and means for oscillating said cam during the formation of the last few stitches of the buttonhole.

ll. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, means to give the stitch-forming mechanism and work clamp a relative feeding movement, a normally inactive oscillatory barring cam, a member connected to the work clamp and having a portion engaging said cam, a continuouslymoving actuator, and means to actuate said cam from the actuator during the formation of the last few stitches of the buttonhole.

42. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, means to give the stitch-forming mechanism and the work clamp a relative feeding movement, a normally inactive barring cam, a member connected to the work clamp and having a portion engaging said cam, means to render said cam operative during the formation of the last few stitches of the buttonhole, and means to render the feeding means inoper ative while the barring cam is operating.

43. In a buttonhole sewing machine, the combination with stitch-forming mechanism, of a work clamp, a barring cam for giving the work clamp a suflicient lateral movement to efiect the formation of barring stitches, means to maintain the barring cam inoperative except during the formation of the last few stitches, and means to render said cam again inoperative upon the completion of the buttonhole.

44. In a buttonhole sewing machine, the combination with stitch-forming mecha nism, of a work clamp, means to give the work clamp and stitch-forming mechanism a relative feeding movement, a'barring cam for effecting relative lateral movement between the work clamp and stitclrforming mechanism sufficient to form barring stitches, a continuously-operating actuator, a connecting member for communicating motion from said actuator to the barring cam, means to maintain an inoperative relation between said actuator and connecting member during the formation of the edge stitches, while permitting an operative relation to be established after the completion of the edge stitches and during the formation of the barring stitches, and means to render said connection inoperative again after the completion of the barring stitches.

45. In a buttonhole sewing machine, the combination with stitch forming mechanism, of a clutch for operating said mechanism, a clutch-disengaging member, a latch to hold said member inoperative, means to release said latch before the last few stitches of the buttonhole have been formed, means In testimony whereof, I have signed my to hold said member inoperative after the name to this specification, in the presence of latch is released and while said last few two subscribing witnesses.

stitches are being formed, and means under JOHN KIEWICZ. e the control of the operator for causing these Witnesses:

last few stitches to be either in the nature FREDERICK W. DAVISON,

of edge stitches or barring stitches. FREDERICK J. DORGAN.

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