US1749529A - Presser-foot mechanism for sewing machines - Google Patents

Description

March 4, 1930.

W. A. FEIGEL PRESSER FOOT MECHANISM FOR SEWING MACHINES Filed Sept. 5, 1925 3 Sheets-Sheet l K5 3 I JJ 6 '7 a4 x ,fl. g N "I V ll l lv I IDI .7

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/ J1 Z 1 V 11 46 March 4, 1930. w. A. FEIGELY 1,749,529

PRESSER FOOT MECHANISM FOR SEWING MACHINES Filed Sept. 1925 5 Sheets-Sheet 2 March4, 1930. w. A. FEIGEL PRESSER FOOT MECHANISM FOR SEWING MACHINES a She ets-Sheet 5 Filed Sept. 1925 duringthe Withdrawing of the needles from Patented Mar. 4, 1930 NI STATES'PATENT OFFICE -WILLIAM. A. FEIGEL, 0F GHIOAGQILLINOIS, ASSIG-NOR TO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS f rnnssnn-roornnonnmsnt FOR SEWING-MACHINES l i Application filed September a The invention relates to new and useful improvements in presser foot mechanisms for sewing machines, and more particularly to a presser foot mechanism adapted tobe used in a machine for tipping shoes or similar op erations, wherein short curved lines of stitches are formed An object of ithe invention is to provide av presser foot mechanism wherein the material maybe firmly held on the work support the material, and at the same time wherein saidmaterial may be readily turned so as to directfthe line of stitches in curved'paths.

A further object of the invention is to provide a presser foot mechanism of the above material in the region of the needles. 1

A'still further object of the invention is to provide a presser foot mechanism of the above type, wherein the auxiliary presser foot is yieldingly pressed against the material by an independent spring mechanism which can be adjusted.

I provide a presser foot mechanism of the above type withian edge guide located on the opposite side of the needle or needles from the roller presser foot, which is of particu lar advantage when vamping and tipping shoes; y

These and other objects will in part be obvious and will in part be hereinafter more fully disclosed.

' In'the drawings which show by way of illustration one'embodiment of the invenapplied thereto; 1

Fig. 3 is a view partly in end elevation and partly in section of a sewing machine with the invention'applied thereto, certain a, 1925. Serial No. 54,205.

of the parts of the machine being omitted for dogs, and the auxiliary presser foot, together with the edge guide carried thereby, and

F1g .8 1s'a View showing more or less diagrammatically the needles, presser mechanism, work support and feed dogs with the type wherein the material is held on the material tobe operated upon in the machine. The invention is directed broadly to a presser foot mechanism for the vainping or tipping of shoes or similar work. -When opcrating upon leather with two or 'more needles, and when doing such work that the material has to be turned so as to form curved lines of stitches, considerable difficulty has been experienced in properly holding the material when the needles are withdrawn there'- r V T from, and at the same time, providing a A still further object of the invention is to presser mechanism for holding the material whlch enables the material to be readily guided and turned as desired. The present machine is provided with two needles with which suitable complemental stitch forming mechanism cooperates. These two needles form parallel lines of stitching, and are preferably set in a line diagonal to the line of feed, so that a threaded looper may cooperate with each needle. In order that the machine may be used for vamping or tipping shoes, it is desirable to use a cylindrical work support. The present machine is provided with a roller presser foot, which is located at one side of the needles so as to aid in the directing of the material for forming a curved line of Stitches. The presser foot is not only located at one side of the needles, but the point of contact with the work is substantially in a line passing through the rearmost needle and. at right angles to the line of feed. This aids in the moving of the work in a, curved path. In order to hold the umterial down when the needles are raised from the work, an auxiliary presser foot has been provided which engages the material on opposite sides of both needles and centrally between the needles, when two needles are used.

This auxiliary presser footvis independently mounted" and has an independent spring for yieldingly forcingit on to the material, so

gthtll) the springmay beadjusted whereby the pressure .of the auxiliary foot on the material is light as compared with the pressure of the roller foot againstithematerial. Means is provided for lifting both the auxiliary foot and the roller presser foot from the material to aid in the insertion and removal of the material. In the present machine, means is also provided whereby the roller presser foot may be raised independently of the auxiliary foot. Mounted on this auxiliary press erfoot is an edge guide which is located 7 on'the opposite side of the needles from the roller presser foot. This edge guide is for guiding the upper layer of leather when vamping or tipping shoes. 7

Referring more in detail to the drawings, the invention is shown applied to a sewing machine which includes a work supporting Said needlebar 6. The needle bar in the present machine is provided with two needles"? and 8.

' These needlesare set in a. line along the line of feed diagonally,

maybe provided to cooperatefwith'these needles. This producestwo parallel lines of.

stitches. The work supporting cylinder 1 is closed by the usual hinge cover plate 9, and

the loopers are disposed in rear of this cover plate.

Itis not thought necessary to show them. i

a means for holdingthe Inaterialon the work support and feeding the material, there is provided a roller presser foot" 10 and also an auxiliary presser foot 11. i The. roller presser foot 10 is mounted on aswinging arm 12 which is carried by a bracl'ret 13,. which bracket l?) is secured by suitable screws 14, 14

' to the main presser bar 15. This main presser bar 15 is mounted on the lugs at the forward end of the overhanging arm 5. Said main presser bar is provided with a laterally extending lug 16 on which a leaf spring 17 rests, which spring normally depresses said main presser bar and holdsthe roller foot in firm engagement with thematerialfi In rear of the main presser bar 15 is an auxiliary presser bar .18 likewise mounted in the lower lug at the forward'end of the overhanging arm 5. Said auxiliary bar 18 also reciprocates in a'lug 19 carried by the overhanging auxiliary presser bar may be varied. I threaded locking sleeve 2'Zi1s also placed'on and independent loopers arm 5. The upper lug at the forward end of V i in said sleeve 21 is a short movable rod 22 a which rests on the upperend of the auxiliary bar 18. The sleeve 21 isformed with a recess :therein'indicatedat 28,;which is slightly larger in diameter than the; recess for the upper end of the auxiliary presser bar. This rod 22 extends up into the sleeve 21. A spring 24 located in the recess28 bears at its lower end against a shoulder on the rod '22 and its upper end bearsagainst'the inside face of a cap sleeve 26; The outerface of the upwardly projecting sleeve 21' is threaded. The

inner face of the cap sleeve is likewise threaded and engages the threadon the sleeve 21. By adjusting the'cap sleeve up and down, the tension of the spring 24against the rod 22, and the pressure of the rod 22 against-the A the sleeve 21 and will serve as a suitable way" of locking the cap sleeve in its adjusted positions.;-' v V V The auxiliary presser foot 11 is fixed to the lower end of the presser bar 18. The lower end of. the-main presser bar 15 is reduced as indicatedat 28, and this reduced end of the mainbar extends into-a suitable opening 29 through thevshank of the auxiliary presser foot lll This is a loose connection between the shank of the auxiliary presser foot, and. the lower end of the main presser bar, and is for the purpose of preventing the auxiliary foot from "swinging laterally so that it might be struck by the needles 7 and 8. v

From the above it will be apparent that the 'main presser bar is yieldingly forced downwardly by the leaf spring 17, while the auxiliary presser bar is yieldingly forced downwardly'by the spring2 l. These two yielding devices are independent of each other. The tension of the spring on-the auxiliary foot may beset'so thatthefoot will bear lightly upon the material, as compared with the pressure of the main roller'foot on the material. Bigidly secured to the main presser bar 15 is a forked arm 30 which strad- "which is'ad'apted to engage a projecting pin 33 threaded into the main presser bar. 'Th s main presser'bar mayalsobe raised by means of a lever34, which is pivoted at 35 lto the overhanging arm of the machine. This lever ice adapted to be connected to the treadle in the usual manner so that by depressing the treadle, the main presser foot may be raised. This lever 34 not only lifts the main presser bar, but also the auxiliary presser bar, so "that both the roller foot and the auxiliary foot may'beraised simultaneously, for the insertion or removal of'the material being above referred to.

end 37' of the lever 34 extends underneath this lug 16., When the 'pressedit will engage the lug 16 and thus lift is de lever the'main presser bar. On the auxiliary presser'bar'18 there is a collar 38 which carriesa laterally extendinglug 39. This lug 39 'islikewise. directly over the end 3701 the lever so that when the lever is depressed it will engage both the lug 39 and the lug 16 and "lift 'notonly the auxiliary foot but the main foot. The width of the lug 16 vertically is greater than that of the lug 39, and therefore, the leaf spring 17, while bearing upon the lug 16, will. be above the lug 39 to a certain extent.

' Thisis for the purpose of enabling the spring 24 to controlthe pressure of the auxiliary 'pres'ser :foot' 11. In other words, the auxiliary presser bar has a limited vertical 'movement in the supporting lugs there- -for',', under the tGIlSlOIL of the spring 24;A spring 40 is provided for depressing the forward end of the lever 34. The arm 12 carrying the roller presser foot1O is pivotally connected to an angle bracket 12" "having a horizontal slot 12 therein, and this angle bracket is secured to another angle :fbracket12? by means of a screw 12 The 'angle bracket 12" is in turn secured tothe brac'ket1113 by a screw 13 which passes through a slot 13? in the angle bracket 12.

This is for the purpose of permitting the roller presser footto be properly set so as to engage the material being stitched, not only throughout the entire face of the roller foot,

- which of course, is angular: or beveled, but

curved path.

also for placing the roller foot so that it will be in proper position relative to the needles to enable the material to be turned to stitch in a The shank of the auxiliary presser foot 11 is provided with a collar 41 which is clamped to the lower'end of the auxiliary press'er bar 18. The auxiliary presser foot has a central'finger 42 (see Fig. 7) which'extends between the needles, when two needles are used.

The' throat plate 2 is proyided with needle "openings 43 and 44 for the two' needles 8 and '7, respectively. Alongside of the needle opening 43 is a slot 45 for the section 46 of the feed dog. In the rear of and along the opposite side of the needle opening 44 is a slot 7 -47;for the other section of the feed dog; This opening 47 is shown in dotted lines in Fig. 7.

The main portion of the feed dog is located in the slot 45, and the roller presser foot is directly above a portion-of this section 46 of the feed dog and is also directly at one side of the needle 8. Thus it is that the material may be readily turned while it is being stitched to form a curved line of stitching. The auxiliary presser foot is likewise provided with a finger 48 which lies alongside of the needle passing through the needle opening 43. The auxiliary foot is provided with anotherfinger 49 which is on the opposite side of the needle openings 43 and 44 from the finger 48. The purpose of these fingers of the auxiliary foot is to hold the material down when the needles are raised, so as to insure' the needles being withdrawn from the material without disturbing the location of the material. This auxiliary foot, as has alreadybeen stated, bears with comparatively n light pressure upon the material, and is for the primary purpose of stripping the material from the needles, while the roller presser foot insures a proper feeding of the material a stitch length. Said roller ,presser foot will, of course, turn as the material is fed along by the feed dog.

"same, while the other portion of the mate rial passes along the side of the edge guide and will be properly located relatively to the needles, so that both needles in a machine of the present type will pass through the material, and therefore, lines of stitches formed for securing the upper layer being stitched to the lower layer. This insures the proper placing of the sections of leather being stitched together when tipping or vamping shoes. The edge guide has a laterally projecting portion 52. The auxiliary presser foot has a'forwardly projecting arm 53. Be tween the laterally projecting portion 52 and the arm53 is a spring 54. This spring encircles a pin 55, which extends from the arm 53 down into the shank portion of the auxiliary foot. This pin passes through an opening in'the laterally projecting portion 52 of the edge guide, and therefore, the edge guide is not only yieldingly pressed downwardly by the spring, but is guided in its up and down movements. When the auxiliary presser foot is raised, the edge guide will be pressed downwardly until the lower portion 56 strikes the auxiliary presser foot. Thus it is that the edge guide israised with the auxiliary foot,

but is capable of moving to a position below I the face of the auxiliary foot, when the auxiliary foot is held raised by the material on which it rests, so that the edge guide is positioned for guiding the upper layer of the material as above stated.

While I have shown the invention-applied to a sewing machine having a cylinder bed,

it will be understood, of course, that it may 4 be used in connection with flat bed machines,

and with single needle machines as well as with two needle machines. Furthermore, instead of using an independent looper with each needle, the needlesmay be 'set abreast and a single looper used-therewith, making of a work support, a feed dog, needles, a roller presserv foot at one side of said needles, spring means for yieldingly holding said roller foot against the Work, a inain presser bar on which said roller foot is. supported, an auxiliary presser toot mechanism including an auxiliarypresser'bar disposed in rear of said main presser bar, and an auxiliary presserfoot on the needleside of said roller presser foot,sa1d auxiliarypresser foot having ashank rigidly secured to thelower 1 end of said auxiliary presser-barand having a free sliding connection with said main presser bar whereby said auxiliary presser.

foot can move vertically independently of the main presser bar and is held from lateral movement about the axis or" said auxiliary bar by said main bar and independent spring means for holding the auxiliary presser foot against the work.

- 2. Ina sewing machine,-t he combination -of'a work support, a feed dog, needles, a

' bar by said main bar,

roller presser toot at one side of said needles, spring meansi'or yieldingly holding said roller root against the work, a main presser bar on which said roller foot is supported, an auxiliary presserfoot mechanism including an auxiliary presser bar disposed in rear of said main presser bar, and an auxiliary presser foot on the needleside of said roller presser foot, said auxiliary presser foot having a shank rigidly secured to the lower end of said auxiliary presser bar and having 'a free sliding connection withsaid main presser bar whereby said auxiliary presser foot can move vertically independently of the main presser bar and is heldfrom lateral movement about the-axis of said auxiliary said auxiliary foot having a slot formedtherethrough, and an edge guide yieldingly mounted on theauxilfoot can move vertically independently of the main presser bar and-is held from lateral iary foot and adapted to project through said 7 slot and independent spring means for hold--.

ing the auxiliarypresser foot against the work. 7 r 3' .3. In a sewing machine, the combination of a work support, a feed dog,.needles, a;-:v

roller presser foot at one side of said needles, spring means for-yieldingly holding, said roller foot against the work, a main presser bar on which said roller foot is supv ported, an auxiliary presser foot mechanism 3 including an auxiliary presser bar disposed V in'rear of said main presser 'bar,an auxil ary V presser footon the needle side of said roller presser foot, said auxiliary presser lfoot havv ing a shank rigidly secured to melonsend of saidauxiliary presser bar and having I a free sliding connection with said main presser bar whereby said auxiliary: presser movement about the axis of said auxiliary barby said main bar, a treadle controlled lever, and lugs mounted respectively on the main and auxiliary presser bars andv so disposed relative to said lever that when said lever is depressed, both ofithe presser bars are liftedjand independentspring means for v holding the auxiliary presser foot againstthe work. L111 a sewing machine, the combination of a work support, a feed dog, needles, a yielding roller presser foot atone side of said needles,"a main presser bar on which said roller foot is supported, anauxiliary presser foot mechanism including an auxilarypresser bar d sposed in rear of said main' presser bar, an auxiliary presser foot on the needle side ofsaid roller presser foot, said auxiliary ,presser foot having a shank rigidly secured to the lower, end of said auxiliary V presser bar and having a free sliding con- 7 nection with said main presser bar whereby said auxiliary presser foot can move "verticallyindependently of themainpresser bar and is held from-lateralamovement about the axis of said auxiliary bar by saidmain bar, a treadle controlled lever,- lugs 'mount'ed respectively on the main and" auxiliary presser bars and so disposed relative to said lever that when'said lever is depressed, both of the presser bars are lifted, and a hand leverfor raising said main presserbar independently of said treadlecontrolled lever.

5. In a sewing machine, the combination of a work support, a feed dog, needles, a yielding roller presser foot at one side of c said needles, a main presser bar *on'wh'ich said roller footis supported, an auxiliary presser foot mechanism including. anauxil iary presser bar, {an auxiliary presser foot on the needle side of said roller presser foot, said auxiliary presser foot having a shank' rigidly secured to thelower end 'ofsaid auxiliary presser barand having a free sliding connection with said main presser bar whereby said auxiliary presser foot can move vertically independently of the main presser bar and is held from lateral movement about the axis of said auxiliary bar by said main,

bar, a treadle controlled lever, lugs mounted respectively on the main and auxiliary presser bars and so disposed relative to said lever that when said lever is depressed, both of the presser bars are lifted, a leaf spring bearing on the lug carried by the main presser bar for holding said roller foot in contact with the material, and an independent coiled spring adapted to engage the upper end of the auxiliary bar for yiel-dingly holding said auxiliary foot on the material, said lug on the auxiliary bar being located below the leaf spring whereby said auxiliary bar is free from the tension of the leaf spring. I

6. A presser foot mechanism for sewing machines including a main presser bar and an auxiliary presser bar, a main foot carried by said. main presser bar and an auxiliary foot carried by said auxiliary presser bar and having a free connection with the lower end of said main presser bar, whereby said auxiliary foot may yield independently of the main foot but is held from lateral movement relative to the main foot by said main presser bar, a leaf spring for holding said main presser foot in contact with the material, a coiled spring for holding the auxiliary presser foot in contact with the material, said coiled spring being located at the upper end of the auxiliary presser bar and bearing against the same, and a stationary abutment for engaging the other end of the coil spring, said abutment being adjustable for varying the tension on the coil spring.

a 7. A presser foot mechanism for sewing machines including a main presser bar and an auxiliary presser bar, a main foot carried by said main presser bar and an auxiliary foot carried by said auxiliary presser bar and having a free connection with the lower end I of said main presser bar whereby said auxiliary foot ,may yield independently of the main foot but is held from lateral movement relative to the main foot by said main presser bar, a leaf spring for holding said main presser footin contact with the material, a

bracket at the upper end of the auxiliary presser bar in which said auxiliary presser bar, freely moves vertically, an upwardly'extending sleeve carried by said bracket, a

'coiledspring located in said sleeve, and devices whereby said coiled spring presses -downwardly on said auxiliary presser bar,

a cap sleeve for housing said auxiliary spring auxiliary presser bar, a main foot carried by said main presser bar and an auxiliary foot carried by said auxiliary presser bar and having a free connection with the lower end of said main presser bar whereby said auxiliary foot may yield independently of the main'foot but is held from lateral movement downwardly on said auxiliary presser bar,

a cap sleeve for housing said auxiliary spring and serving as an abutment for the upper end thereof, said cap sleeve having threaded engagement with said bracket whereby the tension of the spring may be varied, and a threadedcollar carried by said bracket for locking said cap sleeve in adjusted positions.

.9. In a sewing machine, the combination of a work support, a feed dog, needles, a main presser bar, a spring bearing on said main presser bar, a roller presser foot carried by said main presser bar located at one side of said needles, an auxiliary presser bar disposed in rear of said main presser bar, a

spring for normally depressing said auxiliary presser bar, an auxiliary presser foot carried by said auxiliary presser bar and located on the needle side of the roller presser foot, said springs for depressing the presser bars being entirely independent of each other in their action.

10. In a sewing machine, the combination of a Work support, a feed dog, needles, a main presser bar, a roller presser foot mounted on said main presser bar, spring means for depressing said main presser bar, an auxiliary presser bar disposed in rear of said main presser bar, an auxiliary presser foot carried by said auxiliary presser bar and having a free sliding connection with the said main presser bar, whereby said auxiliary presser foot can move vertically independently of the main presser bar and is held from lateral movement about the axis of the auxiliary bar by said main bar, and spring means for normally depressing said auxiliary presser bar.

In testimony whereof, I affix my signature.

WILLIAM A. FEIGEL.

and serving as an abutment for the upper end thereof, said cap sleeve having threaded engagement with said bracket whereby the tension of the spring may be varied.

8. A presser foot mechanism for sewing machines including a main presser bar and an

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