US1489390A - Attachment for sewing machines - Google Patents

Description

April 8, 1924; 1,439,390

A. B. MATTINGLY I ATTACHMENT FOR SEWING MACHINES Original Filed Feb. l5, 1918 Sheets-Sheet 1 Inventor:

April 8 A. B. MATTINGLY ATTACHMENT FOR SEWING MACHINES 1918 6 Sheets-Sheet 2 Original Filed Feb. 15

April 8, 1924; 1,489,390

I A B. MATTINGLY ATTACHMENT FOR SEWING MACHINES Original Filed Feb. 15, 1918 s She ets-Sheet 5 /0 I 1' m4 .[nvenfor April 8, 1924. 1,489,390

A. B. MATTINGLY ATTACHMENT FOR SEWING MACHINES Original Filed Feb. 15, 1918 6 Sheets-Sheet 4 Q [04' 2 i 6' us K [1w eat or:

April 8, 1924.

- A. B. MATTINGLY ATTACHMENT FOR SEWING MACHINES Original Filed Feb. 15 1918 6 Sheets-Sheet 5 April 8, 1924;

A. B. MATTINGLY ATTACHMENT FOR SEWI NG MACHINES Original Fild Feb. 15, 1918 6 Sheets- Sheet 6 22 092 iavwxy il/ I1,

Patented Apr. 8, 1924.

ALB rurns B. MATTINGLY, or new YORK, N. 5?.

ATTACHMENT SEWING Application filed February 15, 1918, Serial No. 217,401. Itenewed September 1, 1923.

To all whom it may concern:

Be it known that I, ALBERTUS B. MAT- TlNGLY, citizen of the United States, and resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Attachments for. Sewing lVIac'hines, of which the following is a specification.

This invention relates to an improvement in attachments for sewing 'Inachines, and the inventor is aware that'the device is of a nature similar to that disclosed in British Letters Patent No. 17,15301' 1905, to Hills, and United States Patents 'No. 412,081, to Fletcher, No. 46,736, to Fletcher, No. 990,601, to Seward, and No. 990,610, to Turck, and the object is to overcome some of the objectionable features of these devices and to further improve the same.

The principal objects are to provide a device of this character to automatically cut or slit the cloth just in advance of the stitch: ing or binding of the button-hole so that the needle may pass alternately through the cloth and then through "the 'slit'or cut,

thus causing the thread to be brought through the cut and make a perfect binding of the raw edges of the work, and to provide a means for positively actuating the knife with a quick and decisive action at the proper periods to make the cut the proper length according to the length of the button-holes, and to have the length. of cut automaticallyadjust itself with the adjusting of the device for the length of the button-hole.

The further objects are to provide a device of this character which will provide a means for more evenly distnibuting the stitches around the contour of the buttonhole than has heretofore been accomplished,

' and to provide a means whereby a more perfect adjustment of the cuttingdeviceas regards its aliiie'ment relative to the needle of the sewing machine is obtained.

The still further objects are to provide a device of this character which b its construction is considerably reduced in hei ht and thereby doing away withthe necessity of removing the faceplate-bf the sewing machine to st pressefhar, and

the construction of the base plate obviating the necessity of removing the feed dogs of the sewing machine.

Thestill further objects are to provide an improved ratchet device for effecting the lateral vibration of the work clamp, to produce the overstitch of the edge of the button-hole, and to form other parts of the device the stamping process, screw machines, which is the cheapest method of manufacturing devices of this class. ""A still further object is to provide a device of this" kindin which the knife can be adjusted to cut a line or slit in which the needle will follow with its inside lines of its vibrating motion on its forward movement and also perform the same function on its backward movement in forming or stitching the button-hole.

lV'ith" these and other objects in view. it will be seen that accomplish the foregoing, by referring to the accompanying drawings forming a part of this specification; but I do not wish to confine myself to the exact construction shown, as I have, for the sake 'of clear illustration, exaggerated some of the parts, especially in the side elevations, and the cam faces of the yoke upon which the eccentric cam works.

In the accompanying drawings, showing one embodiment of my invention, Figure 1 is aplan view of the device: Fig. 2 is a similar view to; Fig. 1, partly broken away to show the revolving disk and the cam for moving the work clamp; Fig. 3 is a similar view to Fig. 2, with the revolving disk re moved; Fig. xis a similar view to Fig. 3 and a section taken on line 44 of Fig. 5; Fig. 5 is a side elevation; Fig. 6 is a sectional view taken on the line 66 of Fig. 5; Fig. 7 is a similar view to Fig. 6, with the knife and its operating means removed; Fig. 8 is a similar view toFig. 7 ,"with the work clan-1p;removedsh win the vibrating mea Figf'9 is 'a' similar view to Fig. 8, with the vibrating means removed; Fig. 10 is a central've'rtical sectional view; 11 is a perspectiveview of the operating -ever; Fig. 12'i's'a detail plan ofthe vibrator; Fig. 13 isan' end elevation of the vibrator; Fig. 14

is a) sideelevation of the vibrator; Fig. 1.5

is a perspective view of the vibrator carrier; Fig. 16 is a plan of the supporting plate; Fig. 17 is a bottom plan of the revolving disk; Fig. 18 is a central section of the revolving disk; Fig. 19 is a plan of the cam plate; Fig. 20 is a side elevation of the cam plate; Fig. 21 is a plan of the knife carrier; Fig. 22 is a side elevation of the knife carrier; Fig. 23 is a plan of the knife shield and integral therewith the stripper plate for the needle and the guide for the work clamp; Fig. 24 is a side elevation of Fig. 23; Fig. 25 is a plan of the work clamp; r1 26 is a plan of the ratchet cam; Fig. 27 is a section of the ratchet cam; Fig. 28 is a plan of the pawl plate of the vibrator;-Fig. 29 is a plan of the spring pawl for operating the ratchet cam; Fig. 30 is a bottom plan of the cam. member, showing the cam for operating the knife and the race cam for controlling the work clamp; Fig. 31 is a plan of the upper portion of the assembling stud carrying the brake springs Fig. 32 'is a side elevation of Fig. '31; 1* 1g. is a plan of the lower portion of the assembling stud and Fig. 34 is aside elevation of Fig. 33; Fig. 35 is a plan of the linkage for alining the work clamp and knife with the needle: Fig. 36 is a diagrammatic view showing the movement of the work clamp and cam when the operating cam moves in a circular motion; Fig. 37 is a view similar to Fig. 36, but showing the cam moving in an elliptical path; Fig. 38 is a plan view of the rectair gular block for carrying the cam which regulates the length of the button-hole; Fig. 39 is a side elevation of the block shown in Fig. 38.

I provide a suitable base plate 1, which is secured to a rear throat plate 2 of the sewing machine in any suitable manner, but preferably screwed thereto, as shown in r 1g. 1 of the drawings.

The base plate 1 is provided with an ear 3, which is upwardly turned and carries the operating lever 4, which rocks on a pivot 5 formed of a large screw, the lever 4 being provided with a bifurcated end 6, which engages the shank of the screw of the tightening collar of the needle bar of the sewing machine. The lever 4 is further provided with an arc-shaped slot 7 through which passes the arm of the friction clutch, which receives its'movement from the screw 8 in the ear 9 and the rear end 10 of the slot 7. The-screw 8 is frictionally held from turn ing by the pressure of the spring 11 against its head and the ear 9. The lever 4 is further provided with an arm or downward extension which has a bifurcated end 12 which operates the pawl 13 and the pawl plate 14 by the lever 15 which the bifurcated end 12 embraces, and, which is mounted on the throat plate 2 by means of a body screw forming a pivot 16. In the forward end of the lever 15 is a pin 17 (see Figs. 9, 28 and 29) which operates the pawl 13 and the pawl plate 14 through the slots 18 and 19.

The base plate 1 is further provided with a pivot or stud 20 made up of two parts 21 and 22. The lower portion 21 of the stud is hollow and has its upper and lower ends turned down, leaving a. body portion 23 which is slotted on opposite sides forming grooves 24 for the reception of the extensions 25 of the part 22, and a washer 26 is forced on to the lower part of the part 21. The washer 26 forms a substantial base for holding the stud in a vertical position on the base plate, which "is done by the screw 27 passing through the washer and the base plate 1 and the hollow part 21 and being screwed into the part 22, which looks all of the several,

parts assembled on the stud in position by its head 28, in which are secured two springs 29 which act as friction brakes in connection with the cam member 30, which is driven by a friction device (see Figs. 4 and '10) composed of a friction ring 31 supported by a flange 32 on the cam member in the recess 33 of the ring is pivoted a friction dog 34, which is normally held in contact with cam member 30 by 'a spring The lever 36 of the dog passes through an opening or slot 7 in the operating lever 4 and is operated by the screw and the rear end of the slot 7 the screw 8 forcing the dog and ring backwards and relieving the pressure on the cam member. The springs 29 bearing against the surface 37 prevent the cam member from turning, and on the reverse n'iove-ment of the lever 4 the rear end of the slot forces the dog forward and causes the nose 38 to bite or grip the surface 39 of the cam member 30 and revolve the same a predetermined amount, which is regulated by the screw 8. The plate 40 fixed on upper face of cam member 30 keeps the ring in position.

Rotatably mounted upon the stud 20 and supported by the washer 26 are the pawl. 13 and the pawl plate 14 (which is swung in an are by the end 12 of the lever 4 through a the lever 15 and its pin 17 in a. forward and backward movement) Rotat ably mounted upon the stud 20 and resting upon the pawl plate 14 is a ratchet cam 41, which receives a step by step rotary n'iovement from the upturned end 138 of pawl 13 extending through a slot in plate 14 and en-- gaging in turn the notches 137 of atchet 41 and which operates the vibrator 56. which has its support on the pawl plate and is pivoted on the pin 51 of the Lshaped member 52.

The base plate 1 is further provided with a cut-away portion 43 in which is located a linked member 44 having a slot 45 and a circular opening 46 which fits the head of thescrew 27 which acts as a pivot. Secured to the forward end of the linked member 44: by a pivot is a link 17 withan upturned end 48, which istapped for the screw 49 which passes through a hole in the ear 3 and is provided with a lock nut 50. By turning the screw 419 to pull or push the link 47, the slot 45 canbe made to line up perfectly with the needle and the stud 20 and held in this position by the lock nut 50. The slot 15 is for receiving the bottom end of the pin 51 of the L-shaped member 52, which is provided with a slot 53 for adjusting it upon the base plate 1 by the screw 54, and it is provided with an upturned ear 55 for adjusting it while the screw 54 is loose. Thepin 51 is tight inthe member-52 and its upper end forms a pivot for the vibrator 56, which is connected thereto by the hole 57 in the ear 58, and when assembled the ear 58 is capable of passing under the pawl 13 and pawl plate 14:, while the yoke 59 straddles the ratchet cam and rests upon the pawl plate 14.

The vibrator 56 is provided with a pivoted block 60 which fits the inner faces of the rear yoke 62 of the Work clamp 63, which straddles thestud 20 and rests on the supporting plate 61, which, working in contion by resting-on the shoulders 68 of the bottom part 21 of the stud 20., which fits the hole 69 provided with slots through which pass the extensions 25- of the upper part 22 of the stud 20 and prevent plate 61 7 from turning and causingthe springs 29 -to act as friction brakes on the cam member 30. The screw 27 pulling down on the part 22 pinches the plate 61 between theshoulder 68 and thepart 70 of the upper part 22 of the stud.

Mounted'upon the yoke 62 is the guide or shield 71 for the knife carrier72, having its front end 73 in the form of-a stripping plate which slides in a groove or space 7 1 formed by a plate 7 5, which is forced into the upper jaw 76 of the work clamp. The rear end of the shield 71 is enlarged, forming a guide 77, by means of the downwardly extending flanges 78 fitting the yoke 62, which moves back and forth relatively to the stud 20. "Therectangular opening 79 is of a width equal to the diameter of the upper part 22 of the stud 20, which passes through it and prevents the shield from inovingback and forth but allows its rear and 83 on the under side of cam member 30 (thus causing the vibrator to vibrate or oscillate the work clamp'in the contour of a buttonhole while the revolving disk is moving the work clamp back and forth the length of the button-hole).

Mrmnted upon the guide or shield 77 is the knife carrier 72, which has its spring portion 8i passing through the openings 85 and 86 of the shield 71. The spring portion 8 1 has its outer end bent upward, with two cars 87 forming a pair of jaws for the knife 88, which is held by a pin or screw 89. The rear end of the spring portion 84: is formed in a rectangular frame or yoke 90 having a flange 91 forming a cam face 92 against which the cam with the cam menu ber 30 works, and the flexible portion 94 insures the keeping of the cam 93 and the cam 7.

face 92 always in contact. At a predetermined point the flange 91 forming the cam face92 is cut away or ends at 95, and the yoke is so formed at this point as to have a clearance space 96 to prevent the yoke frame from hitting the cam 93 when the flexible part 94 of the yoke causes the yoke and knife to move quickly back between the strokes of'the needle and thus prevent the needle bar from striking the kinfe several times while it is being moved back fromlunder the needle bar, This quick movement is caused by the cam 93, which holds the yoke forward for the proper time, having an abrupt drop 97, so that while it is revolving on the stud 20 the point 98 passes the point 95 on the cam 92. The point 98 isso formed as to not interfere with the point 95, and this allows the yoke to move back its full stroke at this-point, which is accomplished on one of the upward strokes of the needle bar.

Mounted on the top of the stud 20 and held fixedly in place bydowel pins 99 is a cam plate 100, which works in conjunction with the driving plate 101 that is secured to the cam member 30 and which causes the 'revolving disk 102 to revolve in the path of an ellipse relative to the stud 20 and haviiig its major axis in line witlrthework clamp and its minor axis transverse therewith and volves. The shifting of the pin is caused by the pivoted block 105 sliding in the shallow slot 106. It will be noted that-the slot 104: is

deeper than the slot 106; this is to prevent the pin 103 from enteringthe slot 106 at the critical point when the disk 102 is being driven by the driving plate 101, which is connected to the disk 102 by the pivoted block 107, which is free to slide in the slot 108 of the driving plate.

The foregoing, movement will be" more clearly understood by referring to Fig. 3,

where I have indicated by dotted lines the positions of the pivoted cams and pins and the starting position of the driving plate for each cycle. To make a button-hole, with the driving plate in the position indicated in dotted lines 109, the block 107 will be at 110 and the pivot pin 103 at 111 and block 105 at 112. When the driving plate reaches the position indicated at 113 the block 107 will be at 114 and its center will represent the end of the minor radius of the ellipse and the block 105 will be at 115 and the pivot pin 103 will bein the center of the cam. plate. lVhile the driving plate is moving to the position shown in full lines the pivot pin 103 moves along the slot 104 to 116 and the block 105 returns to the center of the cam plate, and asthe driving plate continues its circular movement to the position 109 the block 105 moves over to 11'? and back tothe center of cam plate. 'Mounted upon the revolvin disk is an adjustable cam 118 held in position by a stud 119 having a rectangular head 120 whichffits the recess 121 and which guides it in its movement. The stud passes through a slot 122 and the cam into a screw cap 123, which causes the earn 118 to bind against the disk 102. This cam 118 moves in an elliptical path or orbit, and the lengths of the major axis is changed by the adjustment of the cam 118 on the disk 102 relative to the center of the disk 102. It will be noted that the pin 103 is carried by the rectangular head 120, and when the cam 118 is moved away from the center of the disk 102 to have the attachment make'a larger button-hole the pin 103 is carried with it away from the I block 105, and this causes the minor axis of the ellipse to remain the same, or in other Words to make the cam 118 travel in an elliptical path, it being understood that the greater the distance between the pin'103 and the block 105 the further the block 105 recedes to the opposite side of the major axis of the ellipse in which the cam 118 is traveling, and thus causes less curvature to the side of the ellipse. It being understood that the minor axis of the ellipse is always constant and controlled by the block 105. Thus, by regulating the distance between the pin 103 and the block 105, suitable ellipses for the different sized button-holes are obtained. The earn 118 performs the function of the eccentric cam of the patents 'mentioned in this specification-and produces a more satisfactory result.

The cam 118 moves the work clamp forward and back from the stud 20 and in line with the needle through the yoke member 124, which is secured tothe work clamp and is provided with a slot 125 in which the cam V 118 is located, and as the cam revolves it works against the face 126 first to drive the clamp forward and against the face 127 to draw the clamp back. The yoke member 124 is secured to the work clamp 63 by means of screws 128, and the forward end is bifurcated and bent so as to form bearingsfor the locking member 129, which is formed of a bent wire having a central portion 130 which acts in the capacity of a hand lever to operate the two end portions 131 which act upon the spring extensions 132 of the upper jaw 63 andwhich are riveted to the rear yoke 62 of the work clamp.

Mounted on the underside of the base plate 1 (see Figs. 8 and 9) is a spring memher'133, which is held in position by the rivets 134 and has an upwardly extending portion 135 which extends through the opening 136 of thepawl plate 14 and into the holes 137 of the ratchet cam 41. This prevents the ratchet cam from being turned backwards by friction of the end 138 of the pawl slipping out of any one of the holes137 upon its backward movement after it has revolved the ratchet cam one-tenth of a turn.

The base plate is further bent or formed so as to have a raised portion. 139 through the center thereof, upon whichthebottom of the work clamp slides and on which is cut the channel or groove 66 for the stripper plate 65, which has an opening 140 somewhat in the shape of a T. Beneath the stripper plate 05 in the base plate is an opening 141 to allow the needle to perform its functions. Theraised portion 139 forms a channel or groove 142 (see Fig. 10), which allows the free action of thefeed dogs of the sewing machine and raises the device enough to permit the cutting of the cloth without the knife hitting the dogs on its downward stroke. 7

The operation of the device is very simple. The rear throat plate of the sewing machine is removed and the Cl6V1CQ-,1S slipped in its place by the insertion of the throat.

end 6 of the lever 4. When the attachment is first put on the'machine thescrew 54 and lock nut 50 are loosened and the screw 49turned to bring the knife'inline with the needle. The lock nut 50 is then tightened up. This holds theslot 45 in a perfectline with the needleand. then the member 52 can be adjusted for any width of vibration for the work clamp. The screw 54 is then tightened and the attachment is ready for operation. It will be understood that after the knifehas been once adjusted for the needle the attachment can be removed if desired and .put back without the knife being readjusted, and the vibratingmovement of the work clamp can also bechanged to take more or less bite when the attachment is ad justed to make a larger or smaller butserted between the jaws and the lever 130' pushed back to its original position, thus causing the upper jaw to force the cloth down into the concave opening in thelower jaw, and at the same time the fianges143 of the upper jaw prevent the slipping of the cloth on the lower jaw and thus, causes the cloth to be stretched like, a drum head. lVith the work clamp in this, position the knife is in the dotted position shown in 5, and upon running the machine the needle bar strikes the top of the knife and forces it through the cloth each time the needle descends, until the work clamp is almost at its extreme forward position, whenthe cam 93 is at the point where the point or nose 98 passes the point 95. The flexible portion 9 1 of the yoke causes the yoke to move swiftly back and draw the knife out of line with the needle bar before it has time to descend and strike it again, (as. shown in full lines inFig. 5 thus preventing further cutting, and the knife remains in this position until the button-hole is finished.

The stud 20 isthe pivot center upon which the work clamp is oscillatedby, the vibrator 56. \Vith each upward movementof the needle bar the lever- 4: is raised, which in turn swings'the pawl plate 1 1 sufficiently to have the pawl 138act on oneofthe holes 137 of the ratchet cam and revolve it onetenth of a revolution, which causes one'of the pointed cam faces1t3 to act on one side.

of the yoke 59 and cause the vibrator to swing to one side on its pivot 51'. The face 14% prevents any overthrow of the vibrator.

The next stroke of the needle causes one of the faces l l-FB to, act on theopposite side of which. strikes the arm or lever 36 of the friction clutch and forces the ring 31 back a predetermined amount, (upon the downward. stroke. of; the needle), h a end 10 of the slot; '1, upon reaching the arm 36, (on the upward movement of; the needle) forces the ring to move; forward and the nose 38 to bite into the cam member 30 and cause it and: the revolving disk to revolve, which causes the cam 118 to act upon the face 126 of the yoke member 12 1 and shove the work clamp forward, and when the cam, on the last half of the revolution of therevolving disk, works against the face 1271 it causesjthe work clamp to be drawn backwards, Therevolying of the cam member 30 causes. the pin 80 to shift its position while the button-hole isbeing made. This is due to the, pin 89 being held relative to the stud ZQ by; the groove 81 and in the start is in the portion 1515 which forms, a part of the back end of the button-hole, that is, the part-wl iich is furthest from the edgeof the garment. The; part 146 holds the pin in a position so that the vibrator will, vibrate the work clamp up one side of the slit which is being made by the knife for the buttom hole. The part 1 17 thencauses the pin 80 to move nearer. to the stud 20,"and this causes the first part of the l ap or eyelet to be made, and the part 148 causes the pin so tom'ove the farthest away from the stuc hand this causes the semi-circular end of the eyelet tobe Ina-def The part 149 causes the pin 80 to move near to the stud, and this causesfthe completion of the eyelet. The pin is then held in position by the part 100 until the vibrating of the work clampdown the other'si'de of the slit conipletes the button-hole by the pin going to its original position in the. portion 145. This operation forms what is. known by the trade as the eyelet or looped button-hole. It will be noted that thecam member '3O revolves an equal distance at" each stroke of the needle, and if thecam 118. wereat tached directly to the cam member 30., the, cam 118 would move in a circle and, would pile up too, many stitches at the end and make a defective button-hole; but having the cam move in an elliptical path this is ob.- vines.) Of] course it is desirable to have the stitches a little closer at the back end than on the side, bu t not to, the extent which would; be produced if the circular movement were used. I

o By. referring to the diagrammatic Figs. 06 and 37, it will be seen more clearly the advantages gainedby the cam 118 moving in an elliptical path instead of the circular path. In these two views I have indicated by the dotted lines 150 the movement, of the cam'member 30 for every ten strokes of the needle or for every ten stitches, and the point where each dotted line 150v touches the semicircle 151 indicates where the cam 118 would be; for instance, after the first ten stitches it would have moved from a to and the second ten stitches from b to 0 and so on until after a hundred and twenty stitches it would be at m and the first half of the button-hole would be finished, and the reverse movement would under the same conditions, while the cam 118 is completing the circle, complete the buttonhole. The vertical lines 152 represent the forward movement of the cam 118 and the horizontal lines 153 the work clamp, and the vertical lines 154 represent the forward movement of the Work clamp. It will be noted that all of the lines 153 are exactly the same length in both figures, and when the cam 118 moves from a to b ten stitches are crowded into the space between a and 0, and when it moves from b to c ten are made in the space from 0 to p, and so on, and as the cam 118 moves from a to g each of the spaces 155 from n to 6 increases in length and thus it will be seen that entirely too many stitches are crowded into the space from a to 0 and o'to 39, while from p to g the stitches would be normal and g to 1' would not have suflicient stitches, and 1" to s and s to it entirely too few, and the exact reverse condition would exist while the cam 118 is moving from g to m and the clamp from t to 2. Thus it will be seen that the circular movement gives a very uneven stitching, of thebutton-hole, by piling up too many stitches at the back end and entirely too few at the eyelet end, as the distance of travel or space is greatly increased by the curvature of the eyelet. It will be noted that the work clamp needs to be re tarded at the eyelet end in order to allow more stitches to be made while the eyelet is being formed, and I accomplish this by having the cam 118 move inan elliptical path and by having the minor axis of the ellipse to the rear of the center of the stud 20, as will be seen by referring to Figs. 3, 19 and 37. It will be noted that the cam 118 follows an elliptical path, indicated by the line 156, and when the cam member 30 moves from a to b the cam moves from a to b, and when the cam member has moved to 0 the cam has moved to 0, and so on, and the clamp has moved from 7i to 0 while the cam member has moved from a to Z) and the cam from a to b, and so on. It will be noted that the spaces n-0 are suitable for the back end andthe space 0p is almost normal and the spaces pg and gr are normal, and the spaces rs to ye are gradually shortened in order to compensate for the increased travel or lengthened space to be stitched while the eyelet is being formed, and the work clamp at this point is moving in a line forming a compound curve instead of a straight line, and the retarding of forward movement allows the sewing machine to supply sufficient stitches to make the eyelet have the proper number of stitches to compare wit-h the sides of the button-hole. It is understood that the formation of the other side of the button-hole is the exact re verse of the movements shown in the diagrams and that the diagram in Fig. 37 shows the movement of the work clamp relative to the needle and the stud of the attachment, it being understood that the back end of the button-hole is the beginning of the operation and also the ending of the operation and that the back end is made while the work clamp is moving forward from n to 0 and the sides from 0 to t and the eyelet end from t to e, or in other words, in the operation of making the button-hole the work on the button-hole is always in the reverse direction to the movement of the work clamp. It will be understood that I have stated for convenience of illustration that ten stitches are made between each of these divisions; but by regulating the screw 8 any number of stitches can be made between the divisions; and from the foregoing it will be clearly seen that the elliptical movement places the stitches very evenly along the sides of the button-hole and does not over crowd the ends too much, as the space between a and 0 is greater than between a and 0.

Certain parts of the present mechanism are not claimed therein, but are claimed in applications Serial No. 353,107; 353,108: 336,256; 218,076; 352,980; 336,257; 3%,235: and 346,236.

I claim as my invention:

1. In an attachment of the character stated, the combination of stitching mechanism including a needle, a work clamp, driving means capable of travel in an elliptical path connected with the work clamp for working the same back and forth in line with the needle, and means adjustable for increasing the major without changing the minor axis of said elliptical path of said driving means.

2. An attachment as described in claim 1 characterized by means for cutting a buttonhole in advance of the stitching.

3. A11 attachment as described in claim 2 characterized by a stud around which said means capable of elliptical travel moves, a ratchet cam mounted upon the stud, means for advancing the ratchet cam, and means connecting the work clamp to the ratchet cam for vibrating the clamp.

4. An attachment as described in claim 3 characterized by means for preventing backward throw of the ratchet cam.

5. An attachment as described in claim 4 characterized by said ratchet cam havin a determined number of projections and double that number of working faces.

6. An attachment as described in claim 5 bar for a predetermined period of time, and quick return means for withdrawing the cutter from the path of travel of the needle bar.

7. An attachment as described in claim 6 characterized by means for so oscillating the work holder as to cause the stitching mechanism to pass a thread first through the work as incised then through the incision and so on to provide a substantially uniform overstitching for the, raw edge throughout its extent.

8. An attachment as described in claim 7 characterized by means for positively moving the cutter in two directions at the proper time.

9. In an attachment of the character stated, the combination of stitching mechanism including a needle, of a work clamp, a stud, a cam member having a driving plate rotatable thereon, a cam plate mounted upon the stud working in conjunction with the driving plate, a disk operable by the driving plate soas to move in an elliptical path with respect to the stud and having its major axis in line with the work clamp and having its minor axis disposed transversely thereto, means operative for increasing the major without changing the minor axis of said ellipse to form different sized buttonholes, and a cam connected to the work clamp and operable by said disk for movement in an elliptical path for. reciprocating the work clamp in line with the needle.

10. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterall of a stud, a'ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphcry of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, means connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism and means adjustable for increasing the major without changing the minor axis of the ellipse.

11. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, means connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means capable of travel in an elliptical path connected. with the work clamp for moving the same back and forth with respect to the stitching mechanism, and means adjustable for increasing the major without changing the minor axis of the ellipse.

12. In an attachment of the character stated, the combination with a frame and a periphery to-vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the pivot of the work clamp to form a button-hole with an eyelet end, means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism, and means adjustable for increasing the major without changing the minor axis of the ellipse.

13. In an attachment of the character stated. the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally. of a stud, a ratchet cam mounted. on the stud and having a central. perforation and ten perforations in a circular series around the center. the periphery of the cam having fi've faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, means connected to the work clamp and engaging said cam periphery to vibrate the work clamp. means for shifting at certain periods the pivot of the work clamp to form a button-hole with an eyelet end, means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism, and means adjustable for increasing the major without changing the minor axis of the ellipse.

1a. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meet ing to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, means connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam. means for shifting at certain periods the pivot of the clamp for moving the same back and forth with respect to the stitching mechanism, and means adjustable for increasing the major without changing the minor axis of the ellipse.

15. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, means connected t the work clamp and en gaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the pivot of the work clamp to form a button-hole with an eyelet end, means for adjusting the vibrator relative to the stud and needle, means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism, and means adjustable for increasing the major without changing the minor axis of the ellipse.

16. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged to engage the cam at said perforations to turn the cam step by step, means connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the pivot of the work clamp to form a button-hole with'an eyelet end, means for adjusting the vibrator relative to the stud and needle, means for regulating the length of the button-hole, means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism, said regulating means being adjustable for increasing the major without changing the minor axis of the ellipse.

17. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, a pawl plate on said stud arranged to engage the cam at said perfo- -ations to turn the cam step by step, means connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means capable of travel in an ellip tical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism, and means adjustable for increasing the major without changing the minor axis of the ellipse.

18. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibratelaterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphcry of the cam having five faces meeting to form five points, a pawl plate on .said stud arranged to engage the cam at said perforations to turn the cam step by step, means connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism, and means adjustable. for increasing the major without changing the minor aXis of the ellipse.

19. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphcry of the cam having five faces meeting to form five points, a pawl plate on said stud arranged to engage the cam at said perforations to turn the cam step by step, means connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the pivot of the work clamp to form a button-hole with an eyelet end, means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism, and means adjustable for increasing the major without changing the minor axis of the ellipse.

20. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud. a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having live faces meeting to form five points, a pawl plate on said stud arranged to engage the cam at said perforations to turn the cam step by step, means connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for shifting at certain periods the pivot of the work clamp to form a button-hole with an eyelet end, means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism, and means adjustable for increasing the major without changing the minor axis of the ellipse.

'21. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a. stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphcry of the cam having five faces meeting to form five points, a pawl plate on said stud arranged to engage the cam at said perforations to turn the cam step by step, means connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the pivot of the work clamp to form a button-hole with an eyelet end, means for increasing or decreasing the overstitch or the lateral throw of the work clamp, means capable of travel in an elliptical. path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism, and means adjustable for increasing th major without changing the minor axis of the ellipse.

22. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphcry of the camhaving five faces meeting to form five' points, a pawl plate on said stud arranged to engage the cam at said perforations to turn the cam step by step, means connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for for increasing the major without changing the minor axis of the ellipse.

23. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, a pawl plate on said stud arranged to engage the cam at said perforations to turn the cam step by step, means connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the pivot of the work clamp to form a button-hole with an eyelet end, means for adjusting the vibrator relative to the stud and needle, means for regulating the length of the button-hole, means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mechanism, said regulating means being adjustable for increasing the major without changing the minor axis of the ellipse.

24. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud. a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancingmeans arranged to engage the cam at said perforations to turn the cam step by step, means connected to the work clamp and engaging said cam periphery to vibrate the work clamp, adjustable means capable of travel in an elliptical pat-h connected with the work clamp for moving the same back and forth with respect to the stitching mechanism for regulating the length of the button-hole, said regulating means being adjustable for increasing the major without changing the minor axis of the ellipse.

25. In an attachment of the character stated, the combination With a frame and a work clamp mounted to re iprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and then perforations in a circular series around the center, the periphand forth with respect to the stitching mechanism for regulating the length of the button-hole, said regulating means being a justable for increasing the major without changing the minor axis otthe ellipse.

26. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, a ratchet cam mounted on the stud and having a central perforation and ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranged ,to engage the cam at said perforations to turn the cam step by step, means connected to the work clamp and engaging said cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shitting at certain periods the pivot of the work clamp to form a button-hole with an eyelet end,ad-

justable means capable of travel in an elliptical path connected with the work clamp for moving the same back and forth with respect to the stitching mecl'ianisrn for regu lating the length of the button-hole, said regulating means being adjustable for increasing the major without changing the minor axis of the ellipse.

27. In an attachment of the character stated, the combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, oil a stud, ratchet cain mounted on the stud and having a central perforation and ten perfor 1 ns in a circular series around the center, the periphery of the cam having five faces meeting to form five points, advancing means arranced to engage the cam at said perforations to turn the cam step by step, means connected the work clan p and engaging said cam periphery to vibrate the work clamp, means for shifting at certain periods the pivot of the work clamp to form a button-hole with an eyelet end, adjustable means capable of travel in an elliptical path connected with the work clamp for moving the same back andtorth with respect to the stitching mechanism for regulating the length of the button-hole, said regulating means being adjustable for increasing the major Without changing the minor az zis of the ellipse.

28. In an attachment of. the character L0 reciprocate thereon ratchet \ed on the stud and having a cenation and ten perforations in a cries around the center, the periphae t. having live is ces meeting to points, advancing inc-ans arranged l perforations to 51- cam step by step, means connected work clamp and engaging said cam y to vibrate the work clamp, means V en ing any backward throw of the orated earn, means for shifting at certai periods the pivot 01"? the work clamp to on-hole with an eyelet end, is increasing or decreasing the oven the lateral throw of the work 'ustable means capable of travel itical path connected with the for moving the same back and respect to the stitching inecha regulating the length of the but said regulating means being adst tch or clamp, ad

hanging the minor axis of the ellipse.

a button-hole stitching attachment, oination of a base, a post on the base, plate firzel on the-post and having a pair of slots crossing each other one being deepthan the other, a second plate rotatable on the post having a slot therein, means for rotating the second plate, head on the two plates; a lug on the head slidable in the seconl plate slot whereby the head is rotated the second plate, a fixed pin on the head slidable in one of the slots of the first plate to cause the head to pivot thereon, a stud adjustable on the head and slidable in the other slot of the first plate whereby such stud and pivot will cause the second plate to revolve the h ad in the orbit of a true ellipse, ant. such stud adjustment will vary the znaj axis of the ellipse relatively to the minor axis thereof, to cause reciprocation of the work-clamp at a comparatively uni form velocity.

30. In a button-hole stitching attachm nt, the combination of a base, post on the base, a plate fixed on the post and hava pair of slots crossing at the center one being deeper than the other, a second plate rotatable on the post and having a slot therein, means for rotating the second plate, head on the two plates, a lug on the head slidable in the second plate slot whereby the head is rotated by the second plate, a fixed pin on the head slidable in one of the slots bf the first plate to cause the head to pivot unaole for increasing the major without 1 l tively to the minor axis thereof, a collar on York and State of New York this 8th day the head attached to said adjustable stud, of February A. D. 1918.

a Work-clamp mounted to reciprocate, and n v having a transverse slot in which said collar ALBERTUS MATTINJL 5 extends to cause reciprocation of the Work- Witnesses:

clamp at a comparatively uniform velocity. CHAS. W. LARUE,

Signed at New York in the county of New VALTER H. HUSTED.

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