US1244041A - Presser-foot mechanism for sewing-machines. - Google Patents

Description

E. ERICKSON. PRESSER FOOT MECHANISM FOR SEWING MACHINES. APPLICATION FILED JULY 3. 1916.

Patented 0011.23, 1917..

2 SHEETS-SHEET l- E. ERICKSON.

PRESSER FOOT MECHANISM FOR SEWING MACHINES.

APPLICATION FILED JULY 3. I9I6.

Patented Oct. 23, 1917.

2 SHEE'TSSHEET 2.

.7 :F r j'er: i":f a; EdwardErickson,

100 10.3 by "(W 30 5% 105 7 ra n; ss I En'wARn nrtro'i isoiii, or cili'iigonna 'nfi, iifassa'cnus'nirsl attenuates) yio roiils'rion MAo INn nY coMrANY, or YiiN', MAssAo lUsET'rs; A cearo amro oF MAssamess-career interfe ences sewmc iricnms Application an Jui e, 1916. SerialNo. 107,868. 1 I

. specification.

This invention. relates, to presser foot mechanisms for sewing. machines andhas for its object the production of a mechanism of this character in which the presser foot when being raised fromthe work support,

will move through the same are as the use dle moves when pulling the loop through the work. q I c -Another objectIof the invention is the production of means actuated directly from the presser foot lever for measuring off the required amount of thread for varying thicknesses ofmaterial. 1

A further object of the invention is the production of a presser foot mechanism which will run smoothly and which may be used successfully on a rapid stitcher. I

The invention consists in -certain novel features of construction andarrangement of parts which maybe fully understood by reference to the description of thev drawings and to the claims hereinafter. given.

For the purpose of illustratingtheinvention, one preferred form thereof is illustrated in the drawings, this form having been found to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which the invention consists can be variously arranged and organized and that the invention is not limited to theprecise arrangement and organization of these instrumentalities as herein shown and described.

Of the drawings:

Figure 1 represents a vertical section of a portion of a sewing machine and showing a presser foot mechanism embodying the principles of the present inventiom said section being on line 1-1 on 3.

Fig. 2 represents a vertical section of the same looking from the opposite direction.

Fig. 3 represents a horizontal section on line 3, 3 on Fig. 2. I

i Fig. at represents a sectional detail show-r ing the, thread measuring devices.

- Fig. 5" represents asection on line 5 on F1g.- 3. I7

Fig.- 6 represents a section on line 6 on F s-lirsprefen sa deta l t with f the presser. foot actuating device with ya part thereof: cut insection on line 7 on 1' Elf 15". I VJ ;.S mi a ar ct s esign te I ik Par s throughout the several figures of the drawlngj-S. I ,.I,' i 1.

In the drawings, 10 represents ,a portion of a frame of a sewing machine having mounted. thereinarevohble shaft 11, said I shaft having mounted thereon and secured theretothe cam members .l2. and 13 andthe eccentric actuating I member 14L Between the camfdisks 12 and.,13 -;.ispositioned a coll ar -15 splined to the shaftll, and surrounding Isaid collar 15 and freely movable thereon is, the hub 16' 0f an. oscillating lever 17 having ;a rearwardly;ex tending arm 18 to which is pivoted at .19 a rod 20, the opposite end of which is adaptedtobe secured to atreadleor some other similar operating device.., -To the rod 20 is secured 21a spring 22, the opposite end of, which is secured to ai'stud 28. on a fixed part ofthe frameflO.

Thiszsprins; 22 normally retains the-lever -17 .1S,in the positionindicated in, Fig. 1 of..the ;drawings.- I WVhen .it is desired to movethe leverl'? about the arr-is, of. the shaft 11, .the rodzi2l' will be moved upwardly by means, of any suitable .treadle mechanism against the tension of the spring 22 I I The machine is provided with the usual work support 24:,and has mounted in a brack'et;.25 a. laterally. extending .pin 26. on

whichis.mountedthe awlcarrier-27 having I I an arm 28;extending towardthe rear of'the machine to/which is pivotally connected the rod 29', .the opposite end of which is con-v nected to any suitable actuating mechanism adapted to oscillate the awl carrier 27 about the axis. of the ,pin 26 during each stitch formingcoperation 1 The carrier :27 is provided. with} the usual curved awl130. There is also mounted upon the pin 26 a needle carrier. :31 having-Se, cured thereto the usual curved barbed nee: dle 32. The awl carrier is provided with somemeans such as the member 33 for mov- I ing the awl carrier laterally when it is de Q naaaoei sired to feed the work. Coacting with the work support 2 1- is a presser foot 3% clamped within the outer end of a lever 35, the opposite end of which is pivotally connected at 36 with an arm 37 having a hub 38 surrounding a collar 39 splined to the shaft 11. The shaft 11 with the collar 39 splined thereto is adapted to freely revolve Within the hub 38.

It is obvious that the arm 37 on the hub 38 is adapted to move in various radial positions about the axis of the shaft 11 and control the movement of the presser foot lever when it is actuated by the devices provided therefor. Intermediate the ends of the lever 35 is a hub 89 through which extends a pivot member 40 extending laterally from one face of a disk l1 from the opposite face of which extends a cylindrical support 42, the axis of which is out of alinement with the axis of the pivot member 40. This support 42 has mounted thereon a sleeve 43 having an enlargedhead as at its outer end. The head 4 1 is provided with a peripheral groove l5 in which are positioned the segments 16 and 47. The segment 46 is prevented from moving by means of a pin 48 extending through an elongated curved slot 50 in the and being threaded to the frame 10, as indicated at 51 in Fig. '2' of the drawings.

The segment 4:? has a slight movement about the axis of the cylindrical support 42 and is provided with a projection 52 at one end, while between its opposite end and the opposed end of the segment 16 is a helical. spring 53 adapted to move the segment in the direction of the arrow (0 in Fig. 6 of the drawings. The head 44: has a cylindrical opening 5% extending therethrough, into which the periphery of the cylindrical support 42 extends, as indicated in Fig. 5 of the drawings. In this cylindrical opening 5% is positioned a fiat-sided semi-cylindrical member 55, between the flat side of which and the periphery of the cylindrical support is located a locking roller 56. From the opening 5a to the periphery of the head 4- is a narrow slit 57 which provides a means whereby when the walls of said slit are moved toward each other the semi-cylindrical member 55 will be clamped in its adjusted position, within the opening 5%. To permit the member 55 to be adjusted in the opening 54, said member is provided with he slot 58 in its outer end, as indicated in dotted lines in 1 of the drawings.

Surrounding the head 1% is a split annular member 59 having an arm 60 extending therefrom and being provided with two separate ears 6l62 on opposite sides of said split. Extending through the ear 6?. and threaded to the car 61 is a clamping member 63, by adjusting which the annular member 59 may be securely clamped to the head 4% and cause it to be moved therewith and at the same time the walls of theslit 57 in the head eel will be forced toward each other and clamp the member 55 in its aid justed position.

The rear end of the arm 60 is provided with a roll 6 1 on one side thereof, said roll being positioned in a cam path 65 in the cam disk 13. On the opposite side of said arm 60 is another roll 66 which is positioned in a cam path 67 formed in the side face of the lever 17. The cam disk 13 revolves in the direction of the arrow 5 011 Fig. 1 of the drawings, and is provided with a cam throw 68, as indicated in said figure. In each revolution of the disk 13 the throw 68 acting upon the roller 64- will cause an oscillation of the cylindrical support 4:2 and raise the presser foot 34 from the work support 24.

@wing to the fact that the movement of the lever 35 is controlled by means of the pivotal. connection 36 with the arm 87 extending from the hub 38 surrounding the revolnble shaft 11., when the support-4i? is oscillated. and the pivot 40 eccentrically mounted thereon is moved about the axis of said support 1-2, the presser foot 3 will be moved in the same are that the needle 32 moves when it is moving upwardly and pulling the loop through the work.

The cam path 65 is provided with a widened portion 69 as indicated in Fig. 1 of the drawings. Owing to the fact that the roll 66 is positioned in the cam path 67 of'the lever 17., and the roll 64L is in the cam path 65, it is obvious that no oscillating movement of the lever 17 can be effected until the widened portion 69 of the cam path 65 is opposite the roll 64.

When the widened portion'69 has reached. a point opposite the roll 6% the rod 20 may then be forced upwardly and the cam path 67 acts upon the roll 66 to force the arm 60 downwardly and toward the front of the machine. This movement will cause the roller 56 to strike against the finger 70 extending upwardly from the segment 46 and thus unlock the member from the cylin drical support 42. The projection 71 on the lever 17 will then contact with the projection 72 formed upon plate 73 secured to the end of the cylindrical support 42 by means of the nut 7 1-. lVhen the projection 71 has engaged with the projection 72 the support 4-2 will be moved about its axis and ca se the lifting of the presser foot independently of the cam throw 68. A spring 75 having one end surrounding the pin 48 and the other end extending beneath the lateral extension76 on theplate 73, normally retains the presser foot fi l; in contact 1 the up :27 surface of the work.

.mlow the revoluble shaft 11 is a member '77 pivoted to the frame 10 at 78 and having a slot '59 therein through which extends a clamping bolt 80 by means of which the member 77 may be locked in adjusted position when moved through a limited are about the pivot 78. The upper end of the member is provided with a stop'projection 81 extendin laterally from the upper end of said mem er, as indicated in Fig.4 f the drawings At the outer end ofthe stop member 81 is a plate 82 having secured thereto the revoluble sheaves 8:3 and 8 4. Pivotally mounted upon the plate 82 is a pawl 85, the free end of which is adapted to engage with the 7 rear flat face of the stop projectionl dhsaid pawl being normally forced against said projection by means of the spring 86,

This pawl 85 permits the thread't' to be moved from the sheave 84 to the work, but prevents said thread from being moved in the opposite direction. Coacting with the front face of the stop member 81 is a finger 87 projecting from the lower end of an arm 88 pivoted at 89 to the lever 35. This arm 88 has revolubly mounted therein a roll 90 adapted to be engaged by the eccentric actuating member 14 during each rotation of the shaft 11. About a stud 91 fixed to the frame is a helical spring 92 the upper end 93 of which en ages the arm 88 and normally retains thefi nger v87 in contact with the thread t passing over the stop projection 81. H

From a stripper of any well-known form of wax pot, the thread If passes between the front face of the stop projection 81 and the finger 87, then over the sheave 83 and around the finger 87 to the'sheave 84, from which it passes between the rear face of the projection 81 and the pawl 85, all as shown "in Fig. 2 ofthe drawings. I

It is obvious, inasmuch as the thread t is prevented by means of the pawl 85 from moving in a direction away from the work being operated .upon, that during every movement of the arm 88 about its pivot 89 a quantity of thread will be drawn from the source of supply preparatory to its being used in the formation of'the' next stitch. The amount of thread thus measured ofi depends entirely upon the position of the roll90 relatively to the path of movementto f the eccentric actuating member 14. It is self- ,evident that thenearer the roll 90 is to the axis of the shaft 11, the greater will be the amount of thread measured off during every revolution of the'actuating member 14.

As the thickness of the material being operated upon varies, the position of the presser feet will v be-a utomatieally varied, and the location ofthe roll '90 relativel to the actuating member 14 will be changed, thereby determining the lengthcof thread necessary for the various thicknesses of stock.

A spring 94 interposed between a pin 95 lVhen it is desired to place new work upon the work support, the operatorraises the rod and thereby moves the lever 17 sothat its projection 71 will contact with the projection .72 and cause the presser foot lever support 42 to be moved about its axis and the presser foot 34 raised sufficiently for the admission of the work.

It obvious that the widened portion 69 of the cam path 65 must be oppositev the roll 64 at this time, the ca ndisk 13 either having been rotated about theaXis of the shaft 11 by hand or having been stopped at this point by means of a stop motion generallyused ininachines of this type. I j

The cam path 67 acting on the roller 60 during the oscillation of the lever 17 will unlock the support 42 so that it may be freely turned about its axis when the arm 72. is depressed by the projection 71.

Nhile the work is being operated upon the support 42 will be unlocked. during each revolution of the cam disk 13 whenever the throw 68 passes the roll 64. When the roll ,64 passes downthe inclined portion 97 of the campa'th 65, it will cause the support 42 to be locked, and will then force the presser foot 34 downwardly a predetermined distance to give'arequired and-uniform pressure. a

The presser foot 34 is provided with a cylindrical shank 100 which is positioned in an' opening 101 extending horizontally through the forward end of the lever 35,

said lever bein provided with a peripheral slot 102 eXten ing to said opening 101, as indicated in Fig. 2. a

A clamping member 103 with its shank extending across said slot and threaded at 104 to said lever is adapted to, clamp the presser foot 34 in adjusted position.

The presser foot 34is provided with a heel 106 the position of which relatively to the needle may be varied as desired by loosening the member 103, moving the presser foot 34 about the axis of the shank 100 and then again turning the member 103 to lock the presser foot in its new osition.

V lWhen the length of the stitchesis varied,

it is very desirable that the position of the presser foot should be varied so that the end 107jthereof'will be'as close as possible to the outer position of the awl 30. This ad justment may I be made by loosening the member 103, moving the shank 100 endwise in the opening 101,. and then again tightening the member 103. v V This means of adjusting the presserfoot relatively to its supporting lever and in directions substantially perpendicular to each other is of great advantage. 7 Owing to the location of the pivot at quite a distance from the under face of the presser foot, this under face maintains a position substantially parallel with the upper face of the work support even when said presser foot is raised.

By causing the presser foot 3% to move in the same are that the needle moves, the heel 106 of the presser foot 3% is always maintained in the same relation with the needle 32 regardless of the thickness of the work being operated upon. This is of great advantage; for heretofore the presser foot would become more and more separated from the needle as the thickness of the material increased, and imperfect results would consequently be obtained.

On the sleeve 59 is a projection 108 with which the arm 72 contacts to prevent the presser foot 34: from coming into contact with the work support Normally the under face of the presser root 3% is separated from the upper face of the work support 24: a distance at least equal to the movement that would be imparted thereto by the cam throw 97 to give the necessary pressure to the material being operated on.

By retaining the presser foot 34 normally separated from the work support 24: the accidental breaking or bending of the parts when pressure is applied is entirely obviated. l

t is believed that the operation and many advantages of this invention will be fully understood from the foregoing description.

Having thus described my invention, I claim:

1. In a device of the class described, a work'support; an oscillating curved needle; a presser foot; a lever therefor; a link pivotally connected at one end to the rear end of said lever; a pivot member for the opposite end of said link; a pivot for said lever intermediate its ends; an. oscillating memher on which said pivot is eccentrically mounted; and means for transmitting movement to said oscillating member.

2. In a device of the class described, a. work support; an oscillating curved needle; a presser foot; a lever therefor; a link pivotally connected at one end to the rear end of said lever; a pivot member for the opposite end of said link; a pivot for said lever intermediate its ends; an oscillating memher on which said pivot is eccentrically mounted; and means for transmitting movement to said oscillating member and looking it from movement at predetermined times.

3. In a device of the class described, a work support; an oscillating curved needle; a presser feet; a lever therefor; a link pivotally connected at one end to the rear end of said lever; a pivot member for the opposite end of said link; a pivot for said lever intermediate its ends; an oscillating member r on which said. pivot is eccentrically mounted; and cam-controlled means for transmitting movement to said oscillating member.

4. In a device of the class described, a work support; an oscillating curved needle; a presser foot; a lever therefor; a linkpivotally connected at one end to the rear end of said lever; a pivot member for the opposite end of said link; a pivot for said lever intermediate its ends; an oscillating member on which said pivot is eccentrically mounted: a sleeve surrounding said oscillating member and provided with a longitudinal opening at its outer end extending to the periphery of said oscillating member; a roller in said opening; and a cam controlled member coasting with said roller to cause it to impinge upon said oscillating member.

5. In a device of the class described, a work support; an oscillating curved needle; a presser foot; a lever therefor; a link pivotally connected at one end to the rear end of said lever; a pivot member for the'opposite end of said link; a pivot for said lever intermediate its ends; an oscillating memher on which said pivot is ecentrically mounted; a sleeve surrounding said oscillating member and provided with a longitudinal opening at its outer end extending to the periphery of said oscillating member; a roller in said. opening; a cam controlled member coacting with said roller to cause it to impinge upon said oscillating member; and means for moving said roller into an unlocked position at predetermined times.

6. In a device of the class described, a presser foot; a lever therefor; means for controlling the movement of said presser foot lever; a pivot for said lever eccentrically mounted upon a cylindrical support; a sleeve surrounding said support; a cam controlled lever secured to said sleeve; and means carried by said sleeve for looking it to said support at predetermined times.

7. In a device of the class described, a presser foot; a lever therefor; means for controlling the movement of said presser foot lever; a pivot for said lever eccentrically mounted upon a cylindrical support; a sleeve surrounding said support; a cam controlled lever adjustably secured to said sleeve; and means carried by said sleeve for locking it to said support at predetermined times.

8. Ina device of the class described, a presser foot; a lever therefor; means for controlling the movement of said presser foot lever; a pivot for said lever eccentrically mounted upon a cylindrical support; a sleeve surrounding said support; a cam controlled lever secured to said sleeve; and means carried by and adjustable within said sleeve for locking it to said support at predetermined times.

9. In a device of the class described, a presser foot; a lever therefor; means for controlling the movement of said lever; a pivot for said lever eccentricall'y mounted upon a cylindrical support; a headed sleeve surrounding said support-and having a longitudinal. opening in said head; a fiatsided member in said opening; a roller be-v tween the flat side of said member and.

said support; and a; cam-controlledlever securedto said sleeve.

.10. In a device of the class descr1bed,a

' presser foot; a lever therefor; means for controlling the movement of said lever; a pivot for said lever eccentri'cally mounted upon a cylindrical support; a headed sleeve surrounding said support and having a longitudinal opening in said head; a fiatin adjusted position.

a spring interposed between the ends of-said'segmentsQ' f the class"described,fa resser foot; a leverltherefor; means for sided member in said opening; a roller between the fiat side of said member and said support; a cam controlled lever; and means for clamping said lever to saidsleeve. 1

11., In a device of the class described, a presser foot; a lever therefor; means for controlling the movement of said lever;a pivot for said lever ecoentrioally mounted upon a cylindrical support; a headed sleeve surrounding said support and having a longitudinal opening insaid head; a flatsaid member and said support; a cam-controlled lever; and means for simultaneously clamping sa1d lever to said sleeve, and said flat sided member in "its adjusted position within said sleeve.

13.111 a device of the class described, a

'pr'esser foot; a lever therefor; means for controlling the movement OIE'Sfl1C1.'l6YI a pivot for said lever ecoentrically mounted upon a cylindrical support; a headed sleeve surrounding said support and having a longitudinal "opening and a peripheral groove in said head; a flat-sided member in said opening; a'roller between the flat side of said member and [said' support;'a camcontrolled lever secured to saidsleeve; two

disk segments 'insaid peripheral groove provided with fingers extending toward each other on oppositesides'of said roller; and opposite 14.1 a device of controlling the movement of said lever; a pivot forf'said lever eccentrically mounted upon a cylindrical support; (a headed sleeve surrounding said support and having a longitudinal opening and 'a peripheral groove in said head; a hat sided member in said opening; a roller between the flat side of said member and said support; a cam controlled lever secured to said sleeve; tw'o disk segments in said peripheral groove provided with fingers extending toward each other on opposite sides of said roller; a spring interposed between the opposite ends of said segments; and a pin exteiidi'ng through one of said disk segments and through anelongated slot in said head into the frame of the ma'chine- V l5. lin a device of the class described, a p'resserfoot; a lever therefor; means for controlling the movement of said lever; a

pivot for saidlever ecc'ent'rically mounted upon a cylindrical support; a headed sleeve surrounding saidsupport and having a cylind'rical opening and aeurved slot extending longitudinally of said head a stationary in said opening between the flat side of said member and said support; and cam-com trolled mechanism for moving said sleeve relatively to said support and said support and sleeve unison.

' 165111 a device of the class described, a presser foot; a levertherefor; means for controlling the movement of sa d'lever; a

9 p n extending through said slot; a flat-s ded member positioned in said opening; a roller pivot for said lever eccentrically' mounted upon a cylindricalsupport; a hea'ded sleeve surroundingsaid support and bat ing a cylindricalopening and a curved 'slot extending longitudinally of said head, said head having a slit extending from its periphery iea to said opening;"means for forcing thewalls of'said. slit toward each other to grip said flat-sided member; a stationary pin extend ing through said slot; a flat-sided member positioned insaid opening; a rollerin said opening between the flat side of said meinher and said support; and cam controlled mechanism for moving said sleeve relatively to said supportand said support and sleeve in unison.

j 17. In a'device of "the class d escribedpa presser foot; a lever therefor; means forcontrolling the movement of said lever; a

pivot for said 'lejvereccentrically mounted upon a cylindr cal support; a headedssleeve surrounding said support and having a cylindrical opening and a curved slot extend ing longitudinally ofjsaiCl, head; a stationary pin extending through said slot; a 'fiat jsided member positioned in said opening; a roller in said opening between the fiat side ofijsaid member and said" support cam controlled mechanism'for moving said sleeve relatively tosaid support and said support and sleeve in unison; and means for limiting the movement of said roller in either direction.

18. In a device of the class described, a presser foot; a lever therefor; means for controlling the movement of said lever; a pivot for said lever eccentrically mounted upon a cylindrical support; a headed sleeve surrounding said support and having a cylindrical opening and a curved slot extending longitudinally of said head; a stationary pin extending through said slot; a flat-sided member positioned in said opening; a roller in said opening between the flat side of said member and said support; cam controlled mechanism formoving said sleeve relatively to said support and said support and sleeve in unison; and means for oscillating said support independently of said sleeve actuating devices.

, 19. In a device of the class described, a presser foot; a lever therefor; means for controlling the movement of said lever; a pivot for said lever eccentrically mounted upon a cylindrical support; cam-controlled mechanisnifor automatically oscillating said support to raise the presser foot prior to the feeding of the work; and independent means for raising the presser foot manually.

20. In a device of the class described, a presser foot; a lever therefor; means for controlling the movement of said lever; a pivot for said lever eccentrically mounted upon a cylindrical support; cam-controlled mechanism for automatically oscillating said support to raise the presser foot prior to the feeding of the work; a spring pressed arm secured to the end of said support; an oscillating actuator adapted to engage said arm and move said support about its axis to raise said presser foot.

21. In a device of the class described, a presser foot; a lever therefor; means for controlling the movement of said lever; a

pivot for said lever eccentrically mounted upon a cylindrical support; a revoluble shaft; a cam secured thereto having a cam path provided with a throw and a widened portion; mechanism for actuating said support including a radial lever; a roll, on each side of said lever, one of which is positioned in said cam path; an arm secured to the end of said support; a member freely movable about said shaft and provided with a cam groove in which the other roll is positioned, the outer wall of said cam groove coinciding with the outer wall of the widened portion of the path in said revoluble cam; and a projection on said movable member adapted to engage said arm to raise the presser foot.

22. In a device of the 'classdescribed, a presser foot; a lever therefor; means for controlling the movement of said lever; a pivot for said lever eccentrically mounted upon a cylindrical support; a revoluble igaeaoei shaft; a cam secured thereto having a cam path provided with a throw and a widened portion; mechanism for actuating said support including a radial lever; a roll on said lever and positioned'in said cam path; an arm secured to said support; a member freely revoluble about said shaft and having a projection adapted in itsmovement to engage said arm to raise the presser foot; and means preventing the movement of said member about said shaft until the roll on said lever is in the widened portion of said cam path. 7

28. In a device of the. class described, a presser foot; a lever therefor; means for controlling the movement of said lever; a pivot for said lever eccentrically mounted upon a cylindrical support; a revoluble shaft; a cam secured thereto having a cam path provided with a throw and a widened portion; mechanism for actuating saidsupport including a radial lever; a roller on said lever and positioned in said cam path; an arm secured to said support;- a member freely revoluble about said shaft and having a projection adapted in its movement to engage said arm to raise the presser foot; and means preventing the movement of said member about said shaft until the roll on said lever reaches a. predetermind point in said cam path. 2 v V r 24:. In a device of the class described, a pivoted lever; a presser foot carried there by; a revoluble shaft; an eccentric mounted thereon and revoluble therewith; an arm pivotally mounted on said lever; a roller carried thereby normally held in the path of said eccentric; means for controlling the movement of said presser foot lever; means for actuating said lever at predetermined times; and a thread measuring device actuated by the movements of said arm about its pivot. I

25. In a device of the class described, a pivoted lever; a presser foot carried thereby; a thread measuring device including in part an arm pivoted. to the presser foot lever; a revoluble shaft; and means on said shaft for actuating said arm at predetermined times.

26. In a device of the class described, a pivoted lever; a presser foot carried thereby; a thread measuring device including in part an arm pivoted to the presser foot le- 11 times; and means permitting the movement of the thread being measured only in the direction from the source of supply.

28. In a device of the class described, a pivoted lever; a presser foot carried thereby; a thread measuring device including in part an arm pivoted to the presser toot lever; a revoluble shaft; means on said shaft for actuating said arm at predetermined times; and a spring pressed pivoted member adapted to engage the thread being measured and prevent its movement toward the source of supply.

29. In a device of the class described, a pivoted lever; a presser foot carried thereby; means for varying the position of said lever for various thicknesses of material; a member provided with a stop projection; a thread sheave on each side of said projection; an arm pivoted to said presser foot lever and provided with a thread engaging finger; means for normally retaining said finger in contact with the thread on the face of said projection; and means for actuating said arm during each stitch forming operation.

30. In a device of the class described, a pivoted lever; a presser foot carried thereby; means for varying the position of said lever for various thicknesses of material; an adjustable member provided with a stop proj ection; a thread sheave on each side of said projection; an arm pivoted to said presser foot lever and provided with a thread engaging finger; means for normally retaining said finger in contact with the thread on the face of said projection; and means for actuating said arm during each stitch forming operation.

31. In a device of the class described, a pivoted lever; a presser foot carried there by; means for varying the position of said lever for various thicknesses of material; a member provided with a stop projection; a

thread sheave on each side of said projection; an arm pivoted to said presser foot lever and provided with a thread engaging finger; means for normally retaining said finger in contact with the thread on the face of said projection; means for actuating said arm during each stitch forming operation; and means mounted upon said stop projection member forrestraining the thread to movement in one direction only.

82. In a device of the class described, a pivoted lever; a presser foot carried thereby; means for varying the position of said lever for various thicknesses of material; a member provided with a stop projection; a thread sheave on each side of said projection; an arm pivoted to said presser foot lever and provided with a thread engaging finger; means for normally retaining said finger in contact with the thread on the face of said projection; means for actuating said. arm during each stitch forming operation; and a pivoted pawl coacting with said stop projection for restraining the thread to movement in one directio-n'only.

33. In a device of the class described, a pivoted lever; a presser foot carried thereby; means for varying the position of said lever for various thicknesses of material; a

ember provided with a stop projection; a thread sheave on each side of said projection; an arm pivoted to said presser foot lever and provided with a thread engagin finger; means for normally retaining said finger in contact with the thread on the face of said projection; and a revoluble member for actuating said arm during each stitch forming operation.

Signed by me at 4 Post Office Sq, Boston, Mass, this 16th day of June, 1916.

EDWARD ERICKSON.

Witnesses:

WALTER E. LOMBARD; NATHAN O. LOMBARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). 0.

Images