US1560282A - Attachment for sewing machines - Google Patents

Description

Nov. 3 192s. v'1,560,282

' A. B. MATTINGLY ATTACHMENT Fn sEwms mcmnss origina Filed ucv. s. 1915- 4 Sheets-sheet 1 f WH 'sg 39 104 105 A85 8f Nov. 3 1925- 1,560,282 A. B. MATTINGLY ATTACHMENT FOR `SEWING MACHINES Origi/.nal Flad No1. J131.3 4 sheets sht 2 fa l 18 Wamesss.' 2"

Nov. 3 1925 f 1,560,282 A. B. MATTINGLY ATTACHMENT FOR SEWING MACHINES Original Filed Nov. 3, 1915 4 sheets-sheet 3 y 55 5l l 33 Winesses:

Nov. 3 g 1925'.

" A. sz-MATTINGLY ATTACHMENT FOR SEWING MACHINES origingusned nov. s. 191s 4 Sheets-Sheet 4 Wn asses:

afi/Zak@ Patented Nov. 3, 1925.

YUNITED STATES ALBERTUS B. MATTINGLY, F NEW YORK, N. Y.

ATTACHMENT non SEWING MACHINES.

Substitute for application Serial No. 798,972, filed November A3, 1913. Renewed December 20, l1919, Serial No. 346,433. This application filed4 September 10,1923. Serial No..662,004.

To all whom t may concern:

Be it known that I, ALBnRTUs B. MAT- TINGLY, citizen of the United States, and resident of New York, in theco-unty of New York and State of New York, have invented certain new and useful Improvements in Attachments for Sewing Machines, of which the following is a. specification.

This invention :relates to an improvement in attachments for sewing machines, and the inventor is aware'that the device is of a nature similar to that disclosed in British Patent No. 17,153 of 1905, to Hills, and the United States Patent 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.

lThis application is substituted for my prior application, Serial Number 798,972, filed November 3, '1913, and which was renewed December 20, 1919, Serial Number 346,433.

The principal objects are to provide a device of this characterto 'automatically cut or slit the cloth just in advance of the stitching 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 hole, and to provide a means for positively actuating the knife so as to give it 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 automatically adjust itself'with the adjust- -ing of the device for the length of the button-hole.

The further objects are to pro-vide a device of this character which by its construction is consi erably reduced in heightvand thereby doing away with the necessity of removing the face plate of the sewing machine to adjust the presser bar, and by the construction of the base plate obviating the necessity of removing the feed dogs of the sewing machine, (both of which things have to be done before the Hills or Turck devices vcan be attachedto the machine).

The still furtherobjects 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 ofthe device by the stamping process, and by screwmachines which `are the cheapest methods of manufacturing devices of this class.

. A `still further object is to provide a device vof thiskind in which the knife can be adjusted to cu-t a line or slit in which the needle will follow with its inside lines of its vibrating motion on its forward movement Vand also perform the same function on its backward `movement 1n forming `or stitching the button-hole.

With these and'other objects in view, it will beseen that I accomplish the foregoing, by referring to the accompanying drawings forming a part of this specification; ybut 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.

In the accompanying drawings, showing one embodiment of my invention, Fig. 1 is a plan View of the device; 2 is a side elevation; Fig. 3 is a horizontal section taken on the line 3-3 of Fig. 2 fand showing diagrammatically the operating cam friction drive or eccentric in dotted lines; Fig. 4 is a similar view to Fig. 3, showing more clearly the operating means for the knife; Fig..5 is a similiar viewrto Fig. 4 with the knife and its operating means removed;

Fig. 6 is a similar view to Fig. 5 with the work clampand kknife guide and also the retaining washer removed, and showing the vibrating-mechanism; Fig. 7 is a similar viewto Fig. 6, showinga part of the vibrating mechanism removed and showing the pawl plate and the adjusting means for the knife, and the adjusting Vmeans for controlling the length of throw of the vblator; Fig. 8 is a central vertical section of the device; Fig. 9 is a perspective view of the operating lever; Figs. 10, 11 and 12 are three views of the vibrator; Fig. 13 is a plan-of the vibrator carrier; Figs. 14 and 15 lare two views of the knife carrier; Figs. 16 and 17 are two views of the ratchet cam; Figs. 18 and 19 ,are two views of ,the shield for the knife carrier, and integral therewith the stripper plate for the needle, andthe guide for the workclamp; Figs. 20 and 21 are two views of the vpawl plate for operating the ratchet cam; Fig. 22 isa plan ofthe work clamp; Fig. 23 is a top plan ofxthe eccentric yoperating mechanism, showing4 the adjustable eccentric cam; Fig, 24 is va fbot- I provide a suitable base plate 1, which is secured to area-r throat plate 2 of the sewing machine in any suitable manner, but

preferably screwed thereto, as shown in Fig. 1 of the drawings.

The kbase 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 thetightening collar Vof the needle `bar of the sewing machine. The'lever 4 is further provided with an arc-shaped slot `7, through fwhich passes the arm vof 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 3 is frictionally held from turning bythe pressure' of the spring 11 againstits head rand the ear 9.` The lever '4,is furtherqprovided with an arm or eX `tension which has an ,upturned bifurcated end 12, which operates the pawl plate 13 by the web portion 14. 1 j

The base plate 1 is further provided with a stud'or pivot 15, which I have shown -screwed into the base plate Vwith its flange or enlargement 16 resting against the plate. Rotatably mounted upon the stud L15 and supported bythe flange 16 is the pawl plate 13, (which is swunglin an arc by the end 12 of the lever 4 in a forward and backward movement).A Rotatablymounted upon the stud 15 and resting upon the pawl plate 13 is a ratchet cam 17, and above this,

`resting on a shoulder 18 of the stud 15, lis the retaining` washer 19, and. then the eccentric disk 2O carrying the adjustable eccentriccam 22, which is held in position by a Tbolt 23 and lock nut 24. The top of the stud 15 is provided with a friction washer 25, which is prevented from turning by the flat 26 of the washer and the flat 27 of the stud. The friction iscaused 4by the tightening of the screw 28 `of the stud, which causes the washer to press the disk'20 against the retaining washer 19.

'The base plate 1 is further provided with a cut away portion 29 havin'g'an ear 30 bent horizontally, and slightly above the bottom -level of the base plate, passing through the slot 31 is a screw 32 into an L-shaped member 33 having a slot 34 and an upturned ear 35. The slot 34 is for receiving the bottom end of the pin 36 ofthe L-shaped memears 52. y

ber37, which is provided with a slot 38 for adjusting it upon the base plate 1 by the screw 39, and it is also provided with an upturned ear 40 for adjusting it while the screw 39 is loose. The pin 36 is tight in the member 37 and its upper end forms a pivot for the vibrator 41, which is connected thereto by the hole 42 inV the'ear 43, vand -when assembled thesear 43 is capable of passing under the pawl plate 13, while the yoke 44 straddles the ratchet cam and rests upon the pawl plate 13.

The vibrator 41 is provided with an upturned bifurcated ear 45, which has two notches 46 in whichv slides the rear yoke 47 (of the work clamp v48), which straddles the stud 15 and rests on the retaining washer 19, which working in conjunction with the slots or notches 46 keeps the forward part 49 ofthe Workv clamp in proper contact with the base plate 1 and prevents the bot-- `tom stripper plate 50 from leaving the slotted way 51 in the base as it is oscillated by the work clamp in connection with the Mounted upon the yoke 47 is the guide or shield 53 for the knife carrier 54, having its front end 55 in the form of a stripping platewhich slides in a groove or space 56 formed byl a plate 57, which is forced into the upper jaw 58 of the work clamp. The rearend of the shield 53 is enlarged, forming-a guide 59 by means of the downwardly extending flanges 60 fitting the yoke 47, which moves back and forth relatively to the stud 15. The rectangular opening l61 is'k of a width equal to the diameter of the upperend of the retaining washer which passes through it and prevents the shield from moving'back and forth but allows its rear end to bedrawn laterally of the stud 15 in -both directions by the pin 62 working in the cam groove 63 formed by the cams 64 and 65, (thus causing the vibrator to vibrate or oscillate the work clamp in the shape of a button-hole 'while the. eccentric is moving the work clamp back and forth the length of the button-hole). s j

Mounted upon the guide 59 is the knife carrier 54, which has its spring portion 66 passing through the openings 67 and 68 of the shield 53. The spring portion 66 has its outer end bent upward, with two ears 69 forming apair of jaws for the knife 70, which is held by a pin or screw 71. -The rear endjof the spring portion 66 is formed in a rectangular frame or yoke 72 having a flange 73 forming a cam face against which the camy 74 works, and the iexible portion 75 insures the keeping of the cam 74 and the cam face 73 always in contact.

The'work clamp is provided with an eccentric yoke or member 76 having an elongated opening 77 in which works the adjustable eccentric cam22 against the faces 7S and 79. (The revolving of the cam 22 around the stud 15 causes the Work clamp torbe moved yback and forth relative to the needle.) The member 7 6 is secured tothe work clamp 48 by means of screwsv 80, and the forward end is `-bifurcated and `bent so Vas to form bearings for the locking member 81, which is formed yof ya bent wire having a central portion 82 which `acts in the capacity of a hand lever to operate the two end portions 83, which act upon the spring extensions 84 (of the upper jaw 58) and which yare riveted to vthe rear yoke47 of the work clamp.

Mounted upon the base plate 1 (see Fig. 7) is a spring member 85, which is held in position by the screws 8G and has an upwardly extending portion 87, which extends through the opening 88 of the pag.511 plate 18 and into the holes `89 of the ratchet cam 17. This prevents the ratchet cam from 'being turned backwards by friction 'of the pawl 90 slippingout of any one of theholes 89 upon its backward movement after it has revolved the ratchet cam one tenth of a turn.

The eccentric disk is revolved by a friction device 91 consisting of a ring 92 carrying a friction dog 93 which turns on a pivot 95 and is `held in its biting position by a spring 94. The operation yof the friction device will be described later on.

The base plate is further bent or formed so as to have a raised portion 97 through the center thereof, upon which the bottom of the work clamp slides and on which is cut the channel or groove 51 for the stripper plate 50, which hasan opening 98 somewhat inthe shape of a T. Beneath the stripper plate 50 in the base plate is an opening 99 to allowthe needle to perform its functions. The raised portion 97 forms a channel or groove 100, (see Fig. 8), which allows the free action of the feed 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.

. The operation of the device is very simple. The rear throat plate of the sewing .machine is removed and the device `is slipped in its place by the insertion of the throat plate 2 which is screwed to the device, and the shank of the screw, which extreme back position is reached. The lever 81 of the locking member 82 is then pressed forward, (that is in the direction of the needle), and forces the arms 83 backwards andtlnisrelieves the pressure ofthe springs 84, which` allows the ljaws `of thework clamp. to open.` The cloth .is inserted between the Vand the kstud 15.

Ljaws and the lever 81 pushed back to `its original position, thus causing the upper `jaw Ito force vthe cloth down vinto ithe'concave opening in the vlower jaw, and `at the same timethe flanges 96o'f 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.V With the work clamp in this position the knife lis in the dotted position shown in Fig. 2, and `upon :running .the i machine the needle y'bar -strikes the top of ythe knife and forces it Vthroughthe cloth each time the needle descends, until the work clamp is almost at its extreme forward position, when the :cam 74 draws the 1 `turnswings the pawlwplate lzsufficiently Ito have the pawl i90 enter yone of the holes 89 of the ratchet ,cam :and `revolve it one tenth `of a revolution, which causes `one ofthe pointed cam faces 101 to act on one side vof the yoke 44fand causethe vibrator to `swing Y to one side :Ion its pivot 36. vThe face l102 prevents any-overthrow of'v the vibrator. The 'next stroke of the lneedle :causes fone of the faces I101 to act on the opposite sideof the yoke `44 and swing it 1in the opposite direction. This movement Aof the vibrator causes the work clamp toibe oscillated on its pivot `62, such motion being' transmitted through the ear v45 of the vibrator. While the vibrator is oscillating the work clampin one direction or the other with every stroke ofthe needle to make the needle pass first through the cloth and then through the cut, the eccentric cam is slowly `shoving the work clamp forward the length ofthe button-hole, the speed ofthe forward movement :being regulated by the screw f8, which strikes the arm 98 of the frictionclutch and forces the ring 92 back av lpredetermined amount, (upon the downward stroke of the needle). The rear end 101ofthe slot 7, upon reaching the arm 93, (on the upward movement of the needle), forces the ring tomove forward and the nose 108 to `bite into the eccentric `disk 20 and cause the diskto revolve, which causes the point 109 of the `cam 221to act upon 'the face 7 9`of the member 76 and shove the work' clamp forward, andwhen the face 109,=onthe lastfhalfof'the `revolution of the eccentric disk '20, yworks lagainst the face 78 fit causes `the work clamp to be drawn backwards. The revolving of the eccentric disk 20 causes the pivot 62 vto shift its `position relatively lto the `ear 45 On the 1li-rst 1part of the I flo - at the start.

revolution of the disk 20 the pivotpin 62 is in that position of the camgroove fdesignated by the number 103, which causes the first straight part of the` button-hole to be made. The parts 104iF and 105 cause the pin 62 to first move further away from the stud and then closer to the. stud than it was (This causes the eyelet of the button-hole to be made), and the part 106, (causes the pin to stand still until the last straight part of the button-hole is finished), and the movement of the pin caused by the part 107 causes the two straight sides of the button-hole lto be stitched together.

In order to make a large button-hole, the eccentric cam 22 is located out at, the periphery of the disk20, and the nearer the center of the disk the cam 22 islocated the smaller will be the button-hole; but no matter what the length of the button-hole is the knife will alwaysmovef from under the needle bar at the same period of the operation of making .the `button-hole and be pushedy under the needle bar at the starting point, so that the slot will always be the -proper length. When a large buttonhole is made its over-stitchshould be of greater length than for a small one, so that kby loosening the screw 39 and drawing the member 37 back it causes the ear lvof the vibrator to be vmoved nearer to the pin 62 upon'which the work clamp oscillates, and causes a longer throw of the work clamp,

a or by moving the member 37 forward the throw of the work clamp isl decreased.

v To line the device up with theneedle of r`the sewing machine the screw 32 is loosened and the member 33 can be moved in either direction, thus carrying the pivot centerof the vibrator to a position which will cause the knife to line up with theneedle on the strokes which pass the needle through the cut.

I claim as my invention: i

. 1. The combination Iwith a frame anda work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, 'a ratchet cam mounted on the stud. and having a lcentral perforation and ten perforations yin a circular series around ,the center, the periphery of the cam having five faces meeting to form five points, advancing means y arranged to engage the cam at said perforations to turn the cam step by step,fmeans connected to the work clampland engaging said cam periphery to vibrate the work, clamp, means for preventing any backward vthrow of the perforated cam, means for shifting Vat certain periods the VVwork clamp relatively toits pivot so as to form abuttonyhole with an .eyelet end, and means for ad- ,justing the vibratorrrelative to the stud and needle.

2. The combination with a frame and a -W,ork clampmounted to reciprocate thereon -to engage the cam at said perforations to turn the cam step by step, means connected to the work clamp and engagingsaid cam periphery to vibrate the work clamp, means for preventing any backward throw of the perforated cam, means for shifting at certain periods the work clamp relatively to its pivot so as to form a button-hole with an eyelet end, means for adjusting the vibrator relative to the stud and needle, and means for regulating the length. of the button-hole;

3. T e combination with a frame and a work c amp 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 ve points, and a pawl plate on said stud arranged to enga-ge the cam at said perforations to turn the cam step by step, and means connected to the work clamp and engaging said cam periphery to vibrate 1 the work clamp. o

4l. The combination with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a stud, al ratchet K cam mounted on the studand having a centralperforation yand ten perforations in a circular series around the center, the periphery of the cam having five faces meeting to form five points, and a pawl plate on said stud arranged to engage the cam at said perforations to turn the cam step by step, mea-ns connected to the work clamp and engaging said cam peripheryfto vibrate the work clamp, and means for preventing any backward throwof the perforated cam.

`5. 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 live points, and 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 6. The combination with a frame and a work clamp mountedto reciprocate thereon and to vibrate laterally, of a stud, a ratchetl 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, and 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, and means for shifting at certain periods the work clamp relatively to its pivot so as to form a button-hole with an eyelet end.

7. 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 tive points, and a pawl plate on said stud arranged to engage the cam at said perforations to turn the cam step by step, means connected vto 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 work clamp relatively to its pivot so as to form a button-hole with an eyelet end, and means for increasing or decreasing the overstitch or the lateral throw of the work clamp.

8. The combina-tion with a frame and a work clamp mounted to reciprocate thereon and to vibrate laterally, of a st-ud, 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, and 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 work clamp relatively to its pivot so as to form a button-hole with an eyelet end, and means for adjusting the vibrator relative to the stud and needle.

9. 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, and 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 work clamp relatively to its pivot so as to form a button-hole with an eyelet end, means for adjusting the vibrator relative to the stud and needle, and means for regulating the length of the button-hole.

10. In apparatus of the character stated, the combination of a base plate, a flanged stud fitted to said plate, a pawl-plate rotatable on said stud and supported by the stud flange and a ratchet cam rotatable on said stud and supported by the pawl plate, the annulus of said cam being made up of a series of arch faces meeting at points and the body of which is provided with an annular series of holes double in number.

Signed at New York, in the county of New York and State of New York, this 7th day of September A. D. 1928.

ALBERTUS B. MATTINGLY.

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