US2560334A - Presser-foot mechanism for rug sewing - Google Patents

Description

July 10, 19 1 J. P. ENOS 2,560,334

PRBSSER-FOOT MECHANISM FOR RUG SEWING Filed April 26, 1949 2 Sheets-Sheet 1 v I a 75 77 a4 1. %f dgg July 10, 1951 Filed April 26, 1949 J. P. ENOS PRsssER-Foo'r MECHANISM FOR RUG SEWING 2 Sheets-Sheet 2 Patented July 10, 1951 PRESSER-FOOT MECHANISM FOR RUG SEWING John P. Enos, Union, N. J., assignor to The Singer Manufacturing Company, Elizabeth, N. J., a corporation of New Jersey Application April 26, 1949, Serial No. 89,737

14 Claims. (01. 112239) This invention relates to rug sewing machines and more particularly to presser-foot mechanisms used with this type of sewing machine.

The Moran United States Patent No. 1,975,728, issued October 2, 1934, discloses a sewing machine adapted for attaching a binding strip to the raw edge of a rug or carpet. The sewing machine of the Moran patent is equipped with a specially designed plate and a guide member which hold the edge of a rug while the binding strip is being applied.

The present invention has as one of its pri mary objects the provision of a presser-foot mechanism especially adapted for use in rug sewing.

Another object of the invention is to provide an improved means for stripping the needle of a rug sewing machine and thereby elfectively preventing flagging of the work and skipping of stitches.

A still further object of the invention is the provision of an improved presser-foot that will have both up-and-down movement with respect to a rug being sewed, as well as to-and-fro movement transversely of the line of stitches being formed.

With the above and other objects in view, as

will hereinafter appear, the invention comprises the devices, combinations, and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodiment of the invention, from which the several features of the invention and the advantages attained thereby will be readily understod by those skilled in the art.

. In the accompanying drawings:

Fig. 1 is a front elevational view of a portion of a rug sewing machine equipped with a presserfoot mechanism embodying the present invention,

Fig. 2 is a fragmentary plan view taken substantially on the broken line 22 of Fig. 1,

Fig. 3 is a fragmentary view, partly in front side elevation and partly in section, showing the presser-foot mechanism in the act of pressing a rug against a guide,

Fig. 4 is a fragmentary view similar to Fig. 3 but showing a modified form of the invention, and

Fig. 5 is a plan view of some of the parts shown in Fig. 4.

A sewing machine I, portions of which are illustrated in the accompanying drawings, is of known construction and is provided with the usual bed-plate I I, and the overhanging bracketarm l2 terminating in a head 13 having a face plate l4 and housing the usual mechanism for operating a needle [5. A main shaft I6 is journalled in the arm [2 and carries an eccentric I! for imparting reciprocating motion to a pitman 18 which, at its lower end, is connected to a mechanism It for operating a top-feeding wheel 2|. anism are fully disclosed in the Moran Patent No. 1,975,728 and, therefore, require no further description.

The presser-footmechanism under consideration comprises an L-shaped operating lever 26, the major portion of which is positioned in a vertical plane. The L-shaped lever 26 is provided with a substantially vertically disposed leg 21 having an offset 25. The lower end of the leg 21 is fulcrumed on a pivot pin 28 that extends parallel to the line of feed and the pivot pin is carried by an upstanding flange of an angle bracket 29, the base of the angle bracket being held to a plate 3| by screws 3232. The plate (H is adjustably secured to the sewing machine bed-plate Ii by screws 33-33 passing through slotted holes lit-34 provided in the plate 3 I The other arm 36 of the L-shaped lever 26 is disposed substantially horizontally and extends from the upper end of the vertical leg 21 in a direction away from the needle [5 of the sewing machine.

The L-shaped lever 26 is rocked toward and away from the needle I5 by a lost motion connection comprising one horizontally extending arm 3'! of an L-shaped pin 38 thatenters a slotted aperture 39 provided inthe arm 36. The other arm 4| of the L-shaped pin 38 is horizontal and formed integral with a notched block 42, which by means of a second notched block 43 and screws 44-44, is clamped to the pitman l8.

A presser-foot 48, having a sole-plate 49 apertured by an oblong needle-hole 5| extending normal to the line of stitches, is provided with an arm 52, extending from one side of the sole-plate. The arm 52 is upwardly curved as at 53 and is twisted ninety degrees as at 54. An upper end 56 of the arm 52 is provided with a hole 51 by which a headed pin 58 pivotally holds the end 55 to the arm 21 of the operating lever 26.

A stiff wire spring GI causes the sole-plate 49 of the presser-foot 48 to be biased downwardly about the pin 58. The upper terminal of the spring BI is held to the upper end of the leg 2? by a screw 62 and by virtue of having the end 63 of the spring 6| hooked about the arm 27. The other end 64 of the spring 6| is curved and slidably engages the upper face of the presser-foot sole-plate 49.

The curved and twisted arm 53-54 of the The sewing machine and the feeding mech- 'rection away from the needle l. The front edge of the sole-plate 49 is rolled upwardly as at B8 and thus provides easy ingress for the rug being.

sewed.

As previously stated, the Moran Patent No; 1,975,728 fully illustrates and discusses the sewing machine used to attach a binding strip tothe.

raw edge of a rug. Because of this, a detailed de 'scription of the sewing machine is not deemed necessary. Sufiice it to say: The feed-wheel; 2

presses yieldingly upon the back face of a rug 3 (Fig. 3) as it is passed, pile face down, over a thick work-supporting plate ll slotted at 12 to receive fastening screws 13. beveled at 1'4 and thereby provides. a work-guide ing edge against which the'pile of. therug is pressed. The plate 3|. has an upstanding rib T6, curved at itsfrontend as at 1]. A pair .of'screws l8l8 passthrough therib IE therebysupporting a rug-edge-bending. guide. 19.. Since :the plate 31 is adjustable, the guide i9is also adjustable transversel of the line of. scam formation, thereby making it possible to cause the needle. IE. to penetrate the bentedgeE of the rugR at the desired distance from. the. edge .of each alternate thrust.

The guide I9.has an. upstanding guidewall 81 which cooperates with the beveled end. 14 ofthe plate. TI to define apassageway.v The guide 19.

and. the. plate I l .guide.v the rug .R during the sewingoperation. Theguide I9 alsohas an.ov.er-- v hanging arm 82,,towardthefront and a second overhangingarmv 83 toward the. rear thereof.

Theunder surfaces of these arms are curved and.

thereby further assist in guiding therug R.

Reference to Fig. 2- indicates that the guide 19 has been cut away between the portionsindicated. by thenumerals. 84. and 86. This providesspace. for the presser-foot 48 tov descend a sufficient.

distance toengage the .rug- R=when the presser-. foot .is in its lowermostpo'sition.

it will beappreciated-that, as themain shaft lerotate's during the normal operation of the.

sewing machine, the eccentric I'I will impart reciprocating motion to the pitman l8, the blocks 42-t3 and the L-shapedpinBS. The up-anddown. movement. of the. arm 31- of-thepin 38 causes the operating lever .26 to rock aboutthe pivot pin 28.

The rockingv movementof the-operating lever 28 imparts two motions to the presser-foot, 48, onean up and-down..motion. and the other a horizontal to-and-fro. motion. Normally, the

presser-foot 48 is pressed downwardlyby the spring 6|. However, when theleverZB has moved in a direction far enough awayfromthe needle 15, the, shoulder 66 of thearm .52 engages the edge 62 of the. vertical leg 21. Further rocking movement of the .arm .26. away from the. needle causes the presser-foot 48, to be raisedsubstantially vertically awayfrom the rug R.

The to-and-fro. movement of thepresser-foot is at right angles to the needle as well as .at right angles to the line of stitches.

plate 49 of the presser-foot48 moves downwardly and engages the back face of the rug R; Asithe.

The plate H. is

As thelever 26 is rocked toward the needle I5, the soles.

stopped by the rug R, the arm 52 pivots on the pin 58 against the pressure of the spring 6 I This causes the sole-plate to move to the left from the position shown in solid lines in Fig. 3 to the position shown in dotted lines. Preferably, the mechanism will be timed so that the needle I 5 and the presser-foot t8 move downwardly? together. Thereafter the needle It starts-to rise while the presser-foot ig continues to descend. Eventually, the presser-foot 43 will begin to rise.

From the above it will be seen that the downward movement of the presser-foot 48 presses the rug R. against the plate I I, holding it there until after. the needle It has started to rise. This o-fcourse-strips the needle and prevents flagging ofthe rug R which if present might cause skippingofstitches. Also the movement of the presser-foot 48in a direction toward the beveled edge i (see Fig. 3) tends to crowd the rug R against the beveled edge '34 and thus positions the rug for proper engagement by the needle. l5;

Figs. Land 5 illustrate a modifiedform of the invention. The construction. shown in Figs. 4 and 5.is identical with theconstruction previously described except thatthe sole-plate49i of thepresser-foot s5. is. apertured with asquarehole 3B, which accommodates onedepending arm 8.):

of an angle shaped pusher orcompressorBL The other substantially horizontal arm 92 of the cori-e. pressor Si is provided with apairofslotted holes:

93- -93. A screw 94 passes through each ofthese holes and by virtue of being screwed into threaded holes in the sole-plate l adjustably.securesthe: pusher 9| to the presser-foot48'. Thearmta makes an angle of slightly more than ninety degrees with the arm. 92 and when the pusher Qi is installed the arm 89 .passesthrough the hole 88 and depends below-the. bottom of the.

so1e-plate49'. This, as best seen in Fig. 4,. places the pusher arm 89 in position to engage thecback face of the rug R and it will be understood'that when the presser-foot .481 executes its to-andfro movement that the pusher-arm BB: will crowdthe rug B, into intimate engagementwith the beveled edge 14 ofthe, plate. H. This.assures proper and accurate positioning of the .rug...R2

with respect to the. plate H and. the needle Having thus set forth the natureof my invena.

tion, what I claim herein is:

1. A sewing machinepresserfoot. mechanism comprising an L-shaped lever, means-for piV-- otally mounting one end of said L.-shaped lever,

a presser-foot pivotally supported from said L- shaped lever, and means for: rocking-said L shaped lever about said pivotal mounting, whereby, said presser-foot is caused to haves-a to-andfro -movement.

2. A sewing -machine .presser-foot mechanism comprising an L-shaped lever, means for pivotally' mounting one end of said L-shaped :lever, a pin carriedby said L-shapedlever, a presser-foct pivotally. supported from said pin, and vertically reciprocating means for engaging said -L-shaped lever and thereby rocking said lever about said pivotal mounting, whereby said presser-foot-is caused to have a to-and-fro movement;

3. A sewing machine presser-foot mechanism comprising alever having a pivotally mounted lower end, means for causing to-and-fropivotal movement of said lever, a presser-foot. arm-pivotally mounted'on. said .lever, asole-plate supported. by the free end of... said presser.-foot arm, ashoulder formed on'said arm and arranged to" eengage. said lever, whereby when said lever is;

rocked in one direction said arm and presser-foot will be raised by the movement of said lever, and a spring arranged to bias said arm and sole-plate downwardly to cause engagement of said shoulder with said lever. i

4. A sewing machine presser-foot mechanism comprising a lever having a pivotally mounted lower end and a front edge, means for causing to-and-fro rocking movement of said lever, a presser-foot arm pivotally mounted on said lever, 21, sole-plate supported by the free end of said presser-foot arm, a 90 bend in said arm,-a shoule der formed by said 90 bend and arranged to en gage said front edge of said lever, whereby, when said lever is rocked in one direction, said .arm and presser-foot will be raised by the movement of said lever, and a spring carried by said lever and arranged to bias said arm and sole-plate downwardly to cause engagement by said shoulder with said front edge.

5. In a sewing machine having a bed-plate, an overhanging bracket arm, a main shaft journaled in said bracket arm, and a reciprocating needle supported from said bracket arm and actuated by said shaft, a roller feed wheel, and a reciprocating pitman for operating said feed wheel from said main shaft; a presser-foot mechanism, comprising, an L-shaped lever having a pair of arms, means for pivotally supporting a first of said arms from said bed-plate, a lost motion pin connection between a second of said arms and said reciprocating pitman, a presser-foot pivotally mounted on said first arm and having a. needle hole for accommodating said needle, and a spring supported from said L-shaped lever and arranged to bias said presser-foot toward said bed-plate.

6. In a sewing machine having a bed-plate, an overhanging bracket arm, a main shaft journaled in said bracket arm, and a reciprocating needle supported from said bracket arm and actuated by said shaft, a roller feed Wheel, and a reciprocating pitman for operating said feed wheel from said main shaft; a presser-foot mechanism, comprising, an L-shaped lever having a pair of arms, means for pivotally supporting the lower end of a first of said arms from said bed-plate, the second of said arms being provided with a horizontally extending slotted aperture, an L-shaped horizontall positioned pin carried by said reciprocating pitman and engaging said slotted aperture, a presser-foot having a bent and twisted arm, means for pivotally mounting said twisted arm on said first arm of said L-shaped lever, said presser-foot having a needle hole for accommodating said needle, and a spring supported from said L-shaped lever and arranged to bias said presser-foot toward said bed-plate.

7. In a sewing machine having a bed-plate, an overhanging bracket arm, a main shaft journaled in said bracket arm, a reciprocating needle supported from said bracket arm and actuated by said shaft, a roller feed wheel, and a reciprocating pitman for operating said feed wheel from said main shaft; a presser-foot mechanism, comprising, a lever positioned in a vertical plane that is parallel to said main shaft, means for pivotally supporting said lever, means for rocking said lever toward and away from said needle, a presser-foot pivotally supported from said lever and having a needle hole for accommodating said needle, and a spring engaging said presser-foot and thereby biasing said presser-foot toward said bed-plate.

8. A sewing machine presser-foot comprising a lever, means for pivotally mounting one end of 6" said lever, a presser-foot pivotally supported from said lever, means for rocking said lever about said pivotal mounting, whereby said presser-foot is caused to have a to-and-fro movement, and a' .a presser-foot arm pivotally supported from said L-.shaped lever, a sole-plate carried by the free end-of said presser-foot arm, a pusher member depending below said sole-plate, and means for rocking said L-shaped lever about said pivotal mounting, whereby said pusher member is cause to have :a to-and-f-ro-movement.

10. In a sewing machine having a bed-plate, a work support guide plate carried by said bedplate, an overhangin bracket arm, a main shaft journaled in said bracket arm, a reciprocating needle supported from said bracket arm and actuated by said shaft, a roller feed wheel, and a reciprocating pitman for operating said feed wheel from said main shaft; a presser-foot mechanism, comprising, an L-shaped lever having a pair of arms, means for pivotally supporting a first of said arms from said bed-plate, the second of said arms being provided with an aperture, means carried by said reciprocating pitman and engaging said aperture and thereby rocking said lever, a presser-foot sole-plate, an arm secured to said sole-plate, means for pivotally mounting said presser-foot arm on said first arm, a pusher member depending below said sole-plate, and a spring supported from said L-shaped lever and arranged to bias said presser-foot and pusher arm toward said bed-plate, whereby when said pitman is reciprocated, said pusher member is caused to have a to-and-fro movement.

11. In a sewing machine having a bed-plate and a reciprocatory needle, a work-supporting plate provided with a work-guiding edge, a complemental work-guide spaced from said guiding edge and providing a passageway thereoetween for a downwardly bent margin of work passing over said work-supporting plate, a movable presser member overhanging said passageway, a hinge member for pivotally mounting said movable presser member, and means operating in timed relation with the reciprocations of said needle to move said presser-member into and out of engagement with the work.

12. In asewing machine having a bed-plate and a reciprocatory needle, a work-supporting plate provided with a work-guiding edge, a complemental work-guide spaced from said guiding edge and providing a passageway therebetween for a downwardly bent margin of work passing over said work-supporting plate, a movable presser member overhanging said passageway, a member for movably supporting said movable presser member, and means operating in timed relation with the reciprocations of said needle to actuate said presser-member in transverse directions to engage and disengage the work and to crowd the work-margin toward said work-guiding edge.

13. In a sewing machine having a bed-plate and a reciprocating needle, a work-supporting plate provided with a work-guiding edge, a complemental work-guide spaced from said guiding edge and providing a passageway therebetween for a downwardly bent margin of work passing over said work-supporting plate, a movable presser-member overhanging said passageway,

mamas;

a compressor aarm v carried :by iand idependingisbe- 10w a'said Vpresser-member, and means :operating timed. relation with th'eirecipro'cations -of: :said

'needie tomo v'e said presser-zmember into andcmt of engagementwith said work.

14. In a sewing machine having 'ia-bedrplate and a reciprocating needle, a. work-supporting plate provided with a work guiding edge, a complemental work-guide spaced from saidguiding edge and providing a passageway'therebetween for a downwardly bent margin of work passing over said work-supporting plate, a movable presser-member overhanging said passageway, a member for movahly supporting said movable presser .membena compresser arm carried by and depending below said presser-member and entering--said .passagewa.y, Land .Jmeans operating in timed relationiwithnthe reciprocations. of said needle :to actuate :said presser-member and comipressori arm in; transverse directions to engage and disengage the Work and thereby. crowd the [work toward-saidwormguiding edge.

JOHN P. ENOS.

, REFERENCES CITED 7 "Thdfoiiowingreferences are of record in the file "(if this patent:

fiNTTED STATES PATENTS .Name Date

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