US2500211A - Sewing machine - Google Patents

Description

March 14, 1950 v. SIGODA 2,500,211

SEWING MACHINE Filed June 7, 1947 3 Sheets-Sheet l INVENTOR. V/c TOR (15/6004 V. J. SIGQDA SEWING MACHINE March 14, 1950 3 Sheets-Sheet 2 Filed June 7, 1947 INVENTOR. 14cm? (ZS/000 4 BY Q2 @m March 14, 1950 V. J. SIGODA SEWING MACHINE 3 Shee'ts-Sheet 3 Filed June 7, 1947 INVENTOR V/cro/e d 5/600/1 A T TORNEKS Patented Mar. 14, 1950 UNITED STATES PATENT OFFICE Victor J. Sigoda, Great Neck, N- Y.,;asS 11.Qr to TMan-Sew florporation, New York, N. Y. a corporation of New York Application June '7, 1947, Serial No. 753,175

18 Claims. 1

This invention relates tosewingmachines, more particularly to that type of machine useful for producing ornamental stitching inthe nature of embroidery and incorporating :the essential features of the Well-known vibrating needle or zigzagzmachine.

Sigoda Patent No. 23655222 of December 19, 1944, shows mechanism capable of application as an attachment to a standard zigzag machine (Singer sewing machine type iii-7W1) for pro- :ducing embroidery stitching. The mechanism operates to laterally v ibrate the needle to produce zigzag stitches and simultaneously to laterally shift the work area of the needle to produce patterns. .to the line of stitching, the filler feeder being shifted so as to follow the median line of the zigzag stitching. The general objects of the present invention are to improve and augment that mechanism and increase its versatility with respect to the variety of work it is capable of producing.

More specific objects of the invention-are:

(a) to provide means for automatically varying the bight-of the zigzag stitchingas the Work progresses togetherwith range limiting and'lockout means therefor;

(b) to provide improved means for feeding a filler thread to-and underneath the line of zigzag stitching so as to assure the engagement of the filler by each stitch;

(c) to provide means whereby the patternforming and filler feeding mechanism incorporated in a zigzag machine may be rendered inoperative at will so that the machine may be continued in operation, without removal of that mechanism, asa regular zigzag machine; and

(d) to provide mechanism capable of performing all of the foregoing objects simultaneously orselectively and of being attached to standard machines without alteration of their basic structure.

For the attainment of the above objects :and others which will appear in the course of the ensuing description, the invention is illustrated by various specific embodiments illustrated in the .Fig. 1;

:It also :feeds a filler thread Fig. 4 is a detail, partly in section, of the adjustable .eccentric [forming part of the :bightcontrolling mechanism taken on the line -4-4 of Fig. 3;;

Fig. 5 is a detail 1in;rear elevation of part of the filler-feeding device taken on the line 5-4: of Fig. 2;

Fig. -6 is a side view .of the same, partly in sectiomtaken generally on the line =65 of Fig. 5

Fig. 7 ,is a plan view of the same taken on the line 1-4 (JfFigAt);

Fig. 8 is an enlarged detail -.view.of the end of the filler-feeding arm with its position relative to the needle shown bythe broken ,line;

Fig. 9 ,is an enlarged detail view, principally in central vertical section, (of 1a modified form of arm-carrying sleeve which enables "the patterncontrolling and filler-jeeding mechanism to be disconnected and rendered inoperative so that the machine operates .as a regular zigzag machine;

Fig. 10 is a viewof the parts shown in Fig. 9 shifted to inoperative and locked -position;

Fig. 11 ,is an elevation of 1a modified form of the device in which separate cams drive the pattern forming mechanism and the bight control :mechanism;

Figs. 12 and ;13 are enlarged detail-views illustrating the iormation of a zigzag stitch over .a filler;

Fig. 1 4 is a composite view showing two different patterns formed by the machine with two different adjustments of the-workieed;

Fig. 15 shows another type Of work capable of being produced; and

Fig. '16 shows a type .of fagoting which may be performed by the machine.

The attachment of the aforesaid Patent 2365;222 isiillustrated :inthat patent as applied to la "Singer type 2107 W 1 .machineand the attachments :of :the present invention .are shown as .applied to a generally similar machine known asthefSingerlKlBW'l.

'Referringzto'Fig. Lthis machine has the usual base or cloth plate 2|), pedestal 12'], armz22 and head .24. Extending horizontally .withinthe arm, as=shown in Fig. .3, is the usual main shaft-25 .having a drive :wheel :26 .at 10118 end and connected at :the other end, within the .head 24, with the usual mechanism for reciprocating the :needle bar 1:23 which passes througha laterally shit-table guide frame '29 pivoted at its upper end "in the usual vmanner .within :the head '24. .The =vertically ymovabl-e Dresser :foot bar :38 is also mounted in -h.ead :2 in {the usual Way and carries the presser foot 3| at its lower end. The machine is provided as usual with one or more tension devices 32 for the needle thread and with an auxiliary tension device 34 for a filler thread, the latter passing downwardly through a guide 35 to the filler-feeding arm 36.

Fastened to the back of arm 22 in the manner described in Patent 2,365,222 is a housing 38 in which is mounted, parallel to main shaft 25, a cam shaft 39 to which is fixed a pattern cam 49 and a worm gear 4| adapted to be driven by a worm 42. The worm is mounted on the end of a transverse shaft 44 which is somewhat longer than and replaces the corresponding shaft with which the machine is originally equipped. Motion is imparted to this shaft from drive shaft 25 through a pair of spiral gears 45 and 46 (Fig. 3) which may have the usual ratio of 2 to 1 so that the transverse shaft 44 rotates once for each two revolutions of main shaft 25. The worm 42 and worm gear 4| may, for example, have a ratio of 2a to 1 so that the cam shaft 39 makes one revolution for each 48 revolutions of drive shaft 25. It will be understood that each revolution of shaft 25 forms one complete stitch. Cam 49 will therefore revolve once during each 48 stitches with the above ratios.

Also mounted on the transverse shaft 44 is an adjustable eccentric of known construction, generally indicated at 48, the principal working parts of which are shown in detail in Fig. 4.. They comprise a disc 49 rotatable with shaft 44 on which is mounted a frame 50 pivoted at to said disc, the movement of the frame being limited by the cooperation of a stud 52 with an arcuate slot 54. Frame 5|! is provided on either side with a hollow arm in one of which is a compression spring 55 held in place by a screw 56 and in the other of which is a thrust pin 53 having a head 59 threaded in the frame. The thrust pin passes through an opening in the side of shaft 44 into the bore 69 with which this shaft is provided and in which is a plunger 9| having a conical end 6|. As is well understood, the degree of offset of eccentric 62, which is integral with frame 59, with respect to shaft 44, may be varied by longitudinal movement of plunger 5|, the end 6| of which acts against the end of pin 58 to move frame 59. When plunger 6| is moved inwardly it moves frame 50 and eccentric 52 against the compression of spring 55, increasing the degree of offset; and conversely, when the plunger is retracted the spring 55 moves the eccentric to reduce the amount of its offset.

Lateral vibratory movement for the formation of zigzag stitches is produced by the rotation of eccentric 62, when it is offset from the center of shaft 94, through the connecting rod 64, which has a strap 65 surrounding the eccentric, rod 64 being attached to the upper end of a link 66 to which is connected a pitman 68 which is attached to the needle bar guide frame 29.

The lower end of link 69 is fulcrumed on the end of an arm 69 which is carried by a sleeve 79, said sleeve having another arm H (Fig. 3) which is provided at its end with a roller 12 which engages with cam 49. Sleeve 19 is rotatably mounted on a rod M which is supported in a bore 13 in the lower part of housing 38. Rod 74 has a head 15 and is held stationary by a set screw 76. As cam 49 rotates it acts through arm H and sleeve 18 to shift arm 69 in accordance with the pattern on the cam, thus shifting the fulcrum point of the linkage which produces the vibratory motion of guide 29 to produce a lateral shifting of the working area of the needle which is independent of its lateral vibration. Also attached at one end to arm 69 is a bar 18 which is attached at its other end to the filler-feeding mechanism, hereinafter described, so that a lateral shifting of said mechanism is produced which corresponds to the lateral shifting of frame 29.

As thus far described, the mechanism is, in general, similar to that disclosed in Patent 2,365,222.

Filler feeding mechanism The apparatus about to be described has for its function the feeding of any desired filler to the line of zigzag stitching, which filler may consist of thread, cord, gimp or the like.

This mechanism actuates the filler-feeding arm 36. Its relation to the machine is shown in Figs. 1 and 2 and its detailed structure in Figs. 5, 6, '7 and 8. Clamped on the presser foot bar 39 by means of a set screw 19 is a yoke having a pair of forwardly extending arms Si and 82 perforated horizontally to receive a sliding shaft 84 which is attached at one end to the bar '18 by a screw 85. Fixed on slide shaft 84 by a set screw 86 is a block 88 which has a bore 89 to receive the pivot pin 99 which is carried by the swingable arm 9|. The latter arm has a socket in its lower end to receive the filler-feeding arm 36, which is held in place by a set screw 92, and above its pivot pin 90 it has a rectangular aperture 94 in which slides a small block 95 which is perforated to receive a pin 96 carried on a collar 98 clamped on the lower end of frame 29 by means of a screw 99.

The operation of this feeder is as follows: As arm 59 is laterally shifted by the rotation of cam 4-!) it simultaneously shift-s frame 29 through pitman 68 and slide shaft 84 through arm '18, thus simultaneously moving pivot pin 99 which supports arm 9| and the pin 96 which is carried by the collar 98 attached to frame 29. So long as these two pins 99 and 96 are kept in the same relative position, arm 9| will not swing but will merely move from side to side following the working position of the needle. However, the lateral vibratory movement of frame 29 which is produced by the eccentric 62 will cause a relative shifting of the pins 99 and 95, which causes arm 9| to swing about pivot 99. Viewed from the rear, as in Fig. 5, when frame 29 is shifted to the left, thus carrying the needle in the same direction, the lower end of feeder arm 95 will swing to the right, and, when the next stitch is formed, frame 29 will swing to the right and arm 9| will swing to the left. Obviously the filler may be made to swing in the same direction as the lateral movement of the needle by modifying the structure shown so that the connection between the frame 29 and arm 9| is below pivot 99 instead of above it as shown. The extent of the swing of the filler feeder will be proportionate to the swing or bight of the needle and the ratio of the distances through which these two elements swing will depend upon the vertical spacing between the pins 90 and 96. This is subject to adjustment by vertical movement of the collar 98 or of the yoke 89. Movement of the latter will also affect the position of the arm 36 with respect to the work positioned on the base 29 of the machine, but it is subject to further compensatory adjustment through movement of the arm 38 within the arm 9|. The

:zslidablae :mounting of :block 13.5 ;in aperture 194 permits :such zadjustmentrandzit also ;permits::.the

raising of presser foot bar 301to releasetheawoi'k. It is desirable that the fillerefee'din arm 35 :work very close "to -:and directly sin front .of the needle, approximately as shown in .Fig. 2, where the needle is designated H10. h'iiEl :8,.the end of the filler-feeding armis shown in enlarged detail andits ,path .of travel relative :to needle I00 is shown by the :broken line Jill. ;In the end of arm 36is:an aperture H12 through -.which the filler masses, this aperture :sloping downwardly toward the aneedle. The ,end:of:arm:3.6

containing :the aperture :102 is :formed with ga :curved surface as shown, and at zone side .of the aperture :the thickness of :the arm :is reduced at JIM for reasons which will be evident from inspection of Figs. 12 and 213, "which :illustrate how the filler iIilii is drawn to one side .against each stitch after it is formed so that w it will'be crossed by the needle :thread EH as the needle descends to make the next stitch.

This action positively sassures 1 the crossing of the filler by each stitch because just prior to the formation of every stitch the filler iis :pnll-e'd :up

against the thread which extends from the last preceding stitch to the needle and when the needle descends it is bound .to .lay the thread across the filler. In prior :machines, in which the filler is merelyguided in front of the needle,

without being shifted laterally, the stitches are frequently formed to one side of :the filler so that the filler is outside the line of stitching.

While line I I0 I passes through thehead of feeder .36, it will be under-stoodthat the needle is' raised 1 out of the way as the feeder moves from one side of theneedle path tothe other.

Bight control It has been explained above :how :the :zigzag stitchis formedby lateral vibrationof .theneedle bar guide frame 29 from the eccentric 62 which transmits motion to the 'frame'througheconnecting rod 64,111'11565 and pitmanifiil. ,Thes'extent of this lateral vibration is determined by "the longitudinal position of the pointed plunger :EI

with respectto thethrustpinfifi of the-variable eccentric shown in Fig. i. To automatically vary'the'bight of the stitching as the work.pro gresses, the machine is provided .with actuating mechanism for plunger .6! which is :;con-

trolled by a cam on theshaft'39 which may ;be the same can! which operates to :laterally shift guide frame 29 to produce a pattern, as is :the

case in thestructure shown in 'Figs. :1 and .3, or

it maybeaseparate camas shown in Fig. :11.

Referring to Figs. @1,:-2 and: 3, plungerifii, which is freely slidable'in the bore :of shaft -44, .is pro- .of the screw bearing against an arm I-Zflxwhich is .formedon or attached toathe side .of the sleeve :18. It will .thus .be seen that as sleeve Jil =is rocked by cam 46, the arm L .Will actuate crank H6, pressing inwardly on plunger 6| whensleeve "Iii is rotated in a clockwise direction as seen .inrFig. 11, thus -,varying the .bight in -.accorclance :with the pattern cof ram 40. 19h the Hit upper side :o'frthe :lower end ;of crank it I 6 a second adjustable screw [21 is provided .by means .of LWhlCh the outward movement of plunger 6| may be limited. Screw IN ;is adapted to be :turned up into'engagementwith the under side of the arm 22 of the machine. Screw I2! may be turned up sufiiciently so as to produce the maximum bight for which the machine is dessigned,in which case the bight will be unaffected by movements of the arm i263, or it-may be set to maintain a desired minimum .bight. -Screw l2! lis internally threaded throughout :most of its length and is rotatable on threaded shaft I23 which is screwed :into arm H6 and held there by lock nut 122. A detent like detent II9 (Fig. 1) may be used to hold screw IZI in any given position if desired.

'Referring'to FigJll, a-modified form of bight control 'is shown mounted in a housing 38 in which a second cam dfl' is placed on shaft 39 betweencam 46 and gear 4! so as to actuate the sleeve 7i) having a side arm 32 pressing against screw M8 to effect bight control independently of the-cam ll] and arm-59. Cam 46' transmits motion to sleeve "'3' through an arm'lI. With 'thisarrangement, in which the bight control is independent of the pattern control, any desired combination of effectsmay be produced by proper shaping and positioning of the'separate cams.

Pattern control disconnecting mechanism -Referringto Figs. 9 and 10, a modified 'struc true is shown which may-be substituted for the :sleeve i'iiland the armsfill and H carried thereby, :asbest shown in Fig. 3,'by means of which :the mechanism for producing lateral shifting'of guide :frame'29 and the filler-feeding mechanism may he-rendered inoperative andheld in fixed position 'sothat'the'machine may be operated at will as :an ordinary zigzag machine.

There is substituted for-rod it a rod 525 having peripheral grooves I26a, I26!) and i260 and a head I 23 having an aperture I29. Mounted on this red is a cam-following arm I30 having a roller l3I,-which arm is carried on a sleeve I32 itowvhichisfixedakey I34. Sleeve I32 is provided with a threaded socket in which is a ball I35, .pressed upwardly by a spring we held in place :by a screw I38, and adapted to engage grooves 12505 or I261) Concentric with sleeve I32 is a second sleeve Mil carrying an arm MI which corresponds to the arm' 69 of Figs. 1 and 3. Sleeve I4!) is slotted at I43 to receive key I36 and is provided'with a detent M2 like I coacting with groove I 230. Since sleeve I32 is slidable longiztudinally within sleeve I 4%, arm 136 may be moved :along rod I25 toward itshead E28 whenever key .1 34 is in alignment with-aperture H29, which is :of a sizeito fit the key closely. When thus moved *the'key will enter the aperture as shown in Fig. .10, roller l3I will be disengaged from cam and arm 13!! will be maintained in this position by the engagement of ball l3'5 with the groove I262). The arm I4I will befixed in position by the engagement of key I 34 withaperture E29 and this will hold stationary the fulcrum for link 65, through whichthe lateral vibration is transmit- "ted-to frame 29. During operation of the machine nmierthese conditions, frame '29 .will'be moved :only by eccentric 62. The needle may be lateral- Zly=vibrated to produce zigzag stitches but they will be applied to the work in a'straight line unaffectedby :the patterncontrol mechanism. The .filler feeder, however, will continue to operate as usual so .long as there v is any relative lateral movement between the needle bar guide frame 29 and the presser foot bar 30.

Disconnectable cam following mechanism as just described may be used also in connection with cam 40 in Fig. 11, if desired, in place of sleeve 18' and arm II.

The structure of Figs. 9 and 10 requires stop-- ping of the machine with key 3 5 in alignment with aperture E29 to permit withdrawal of the roller [3| from cam 40. However, by proportioning the parts so that roller I3l is free of the cam before key 34 enters aperture E29 the mechanism can be disconnected and locked with the machine running.

Examples work Fig. 14 illustrates a type of scallop embroidery which may be produced by the simultaneous use of the pattern-forming and the bight control mechanisms. Referring to the scallops 158, it will be observed that the scallop is produced by the lateral shifting of the working position of the needle as the work progresses, each scallop being formed during one complete revolution of the pattern cam 40. Of course, one cam may be designed to produce a, plurality of scallops. Simultaneously the bight is varied by the same cam, acting through arm I20 and crank H5, to vary the eccentric 62 so that the bight is substantially zero at the beginning of each scallop and gradual- 3 1 increases in width toward its center, at which point it begins to diminish again, giving the scallop a true crescent shape. The longer scallop l! illustrates the change in form resulting from a. change of the rate of feed alone, the rate of feed being twice that used to form the scallops I50. This change is made in the usual manner by means of the feed dog adjustment 15 i (Fig. 1) which is standard equipment on this type of machine. Scallops, as shown, may be formed either with or without a filler.

Fig. 15 shows another type of stitching produced without bight variation and by means of a pattern cam so formed as to rapidly shift the guide frame 29 at intervals from a central position to the left, back to the center, to the right, back to the center again and so on.

Fig. 16 shows a type of fagoting which may be produced, either with or without a filler, so as to join together the spaced edges of two pieces of fabric I and I55. The pattern cam 40 is so formed as to shift the frame 29 from side to side at a substantially constant rate If a filler is not used, the needle thread I06, in passing across the space between the two edges of the fabric, will merely form a twist with the bobbin thread. If a filler H35 is used, as shown in the lower part of Fig. 16, the needle and bobbin threads will be twisted about the filler in the space between the pieces of fabric. Where the stitching overlies the fabric the needle thread of course forms stitches therein and, if a filler is used, the filler is secured to the fabric by the stitches.

The machine herein described is capable of producing a great variety of other stitches in addition to those specifically shown by Way of example, the form and appearance of which can be varied by using different pattern cams, different bight control cams, by different relative settings of the cams when separate cams are used, by various combinations of thread and filler and by different rates of feed.

It will be understood that the details of construction described in connection with the foregoing specific embodiments of the invention are to be construed as merely illustrative and not as limitations of the invention as hereinafter defined in the claims.

What is claimed is:

1. In a, sewing machine having a reciprocating needle bar, a guide frame therefor and mechanism to concurrently produce lateral shifting and lateral vibration of said frame, said mechanism including a variable eccentric having regulating means to control the amplitude of said vibration and a continuously rotating pattern cam to produce said shifting; the combination with said mechanism of an oscillatable member actuated by said cam, said member having operative connections with said guide frame to shift it laterally and with said regulating means to vary the adjustment of said eccentric, whereby the rotation of said cam simultaneously shifts said frame laterally and varies the amplitude of its vibration.

2. In a sewing machine having a reciprocating needle bar, a guide fram therefor and mechanism to concurrently produce lateral shifting and lateral vibration of said frame, said mechanism including a variable eccentric having an axially slidable regulating spindle to control the ampli tude of said vibration and a continuously rotating pattern cam to produce said shifting; the combination with said mechanism of an oscillatable member actuated by said cam, said member having a pair of arms, one of said arms serving to shift said frame, a lever pivoted intermediate its ends, one end of said lever acting upon said spindle to move it axially and the other end of said lever having an operative connection with the other of said arms on said member, whereby the rotation of said cam simultaneously shifts said frame laterally and varies the amplitude of its vibration.

3. In a sewing machine having a vertically reciprocable needle bar and a guide frame therefor adapted to impart lateral vibratory movement to said bar, filler feeding mechanism comprising a feeder arm, a pivotal support for said arm adjacent said frame, and a pivotal connection between said frame and said arm spaced from said pivotal support whereby the lateral movement of said frame swings said arm about its support.

4. The mechanism of claim 3 wherein said pivotal connection between said frame and said arm is slidable in a direction substantially at right angles to the movement of said frame, whereby said feeder arm and its support are movable vertically relative to said frame.

5. In a sewing machine, the combination with stitch forming mechanism including a needle bar and needle carried thereby a guide frame for said bar, and mechanism for impartinglateral vibratory motion and concurrent lateral shifting to said frame to form a design, of means for feeding a filler to the stitching and for guiding it under each stitch, including a filler feeding arm, means for pivotally mounting said arm for swinging motion in advance of the needle and across the feed path of the material, means for shifting the pivotal point of said arm in accordance with said lateral shifting of said frame, said frame and said arm being inter-connected at a point spaced from said pivotal point whereby said lateral vibratory movement of said frame is translated into lateral swinging motion of said arm.

6. In a sewing machine having a presser foot bar, a reciprocable needle bar parallel thereto, a guide frame for the needle bar, and means for laterally vibrating said frame; filler feeding mechassume of the presser foot bar, and a direct driving connection between said frame and-said arm spaced from the center of rotationof said armon its support, whereby lateral movement of said frame causes said arm to swing on its pivot.

7. Filler feedingmechanism for a sewing ma chine which has parallelpresserfoot and'needle bars, and a guide frame for the needle baradapted to be laterally shifted to form a pattern and laterally vibrated to form zigzag stitches, comprising: a yoke attached to said presser foot bar having arms extending toward said needle bar, a shaft slidably mounted in said arms, means for sliding said shaft in accordance withthe lateral shifting of said frame, a block fixed on said shaft, an arm pivotally mounted on said block and having an aperture spaced fromits pivot point, and a member carriedby saidframe extending into said aperture to transmit motionof the frame to said arm, whereby. said arm is rotated on its pivot as said frame is laterally vibrated.

8. In a sewing machine, in combination, a main shaft, a needle bar reciprocated by the rotation thereof, a guide frame for said bar, a transverse shaft driven from the main shaft, a cam shaft driven from the transverse shaft, vibrating means for said frame including a variable eccentric on the transverse shaft having a regulating spindle extending outwardly therefrom, a cam carried by the cam shaft, a member oscillated by said cam, a bell crank having one end positioned to actuate said spindle and the other end to be actuated by said member, and means connecting said member with said frame whereby movement of said member simultaneously shifts said frame and varies said eccentric.

9. In a sewing machine, in combination, a main shaft, a needle bar reciprocated by the rotation thereof, a guide frame for said bar, a transverse shaft driven from the main shaft, a cam shaft driven from the transverse shaft, vibrating means for said frame including a variable eccentric on the transverse shaft having a regulating spindle extending outwardly therefrom, a pattern cam and a vibration-controlling cam carried by the cam shaft, members separately oscillated by each of said cams, a bell crank having one end positioned to actuate said spindle and the other end to be actuated by the said member oscillated by the vibration-controlling cam, and means connecting the member oscillated by said pattern cam with said frame whereby rotation of said cams simultaneously shifts said frame and varies said eccentric.

10. In a sewing machine, in combination, a main shaft, a needle bar reciprocated by the rotation thereof, a guide frame for said bar, a transverse shaft driven from the main shaft, a cam shaft driven from the transverse shaft, vibrating means for said frame including a variable eccentric on the transverse shaft having a regulating spindle extending outwardly therefrom, a cam carried by the cam shaft, a member oscillated by said cam, a bell crank having one end positioned to actuate said spindle and the other end to be actuated by said member, and means associated with said crank to limit the extent of its move ment by said member.

11. The combination of claim 10 wherein the said means to limit the movement of said bell crank comprises an adjustable stop adapted to hold said crank out of driven engagement with said member during at' least a part of the=movement' of said member.

12. In a sewing machine having a-reciprocating needle bar, a guide frame therefor, and mechanismtoconcurrently produce lateral shifting and lateral vibration of said frame, said mechanisminoluding a rotating pattern cam to" produce said shifting; means for rendering operative or inoperative at will said-mechanism for producing lateral shifting without affecting said mechanism for producing lateralvibration com-- prising: a fixed rod mounted adjacent said cam, a first arm adapted to be driven by said cam slidably and rotatably mount-ed on said rod,- a-

secondarm rotatably mounted on-said rod and having a driven connection with said first arm,

said second arm serving as a fulcrum for a part of said mechanism'for producinglateral vibration, and" lockingmeans operative upon sliding of said first arm outof engagement with saidcam to hold said'second arm in a fixed position on saidrod.

13. In a sewing machine having mechanism including a rotating cam to produce variations in the stitching; means for rendering operative or inoperative at will said mechanism comprising: a fixed rod having a head and mounted adjacent said cam, a first arm adapted to be driven by said cam slidably and rotatably mounted on said rod, a second arm rotatably mounted on said rod, a key carried by said first arm and extending through a way in said second arm, said head having an aperture to receive said key upon sliding of said first arm out of engagement with said cam to hold said second arm in a fixed position on said shaft.

14. In a sewing machine having mechanism including a rotating cam to produce variations in the stitching; means for rendering operative or inoperative at will said mechanism comprising: a fixed rod mounted adjacent said cam, a first arm adapted to be driven by said cam slidably and rotatably mounted on said rod, a second arm rotatably mounted on said rod and having a driven connection with said first arm for rotation therewith, and locking means rendered operative upon sliding of said first arm out of engagement with said cam to hold said second arm in a fixed position on said rod.

15. In a sewing machine having a reciprocable needle bar and a needle carried thereby adapted to form stitches, means for feeding a filler underneath said stitches comprising a filler feeding arm, a support for said arm, a guide member for said bar, means for laterally vibrating said member relative to said support to laterally vibrate said bar, said arm having spaced points of direct connection with said support and said guide member respectively, whereby the differential motion between said support and said member produces motion of said arm to laterally shift said filler in accordance with the lateral vibrations of said bar.

16. In a sewing machine having a reciprocable needle bar, a thread-carrying needle mounted thereon, a guide frame for said bar, and means for laterally vibrating said frame; filler feeding mechanism for guiding a filler across the path of each stitch prior to its formation comprising, a filler feeding arm, means for supporting said arm for swinging motion in a plane parallel to the axis of said needle, said arm and said frame being interconnected at a point spaced from the support for said arm, whereby after the formation of a stitch said arm is shifted by movement of said frame relative to said supporting means to draw the filler up against the thread extending from said stitch to the needle prior to the formation of the next succeeding stitch.

17. In a sewing machine having mechanism including a rotating cam to produce variations in the stitching; means for rendering operative or inoperative at will said mechanism comprising: a fixed rod mounted adjacent said cam, an arm adapted to be driven by said cam slidably and rotatably mounted on said rod, means for retaining said arm in two positions longitudinally of said rod, one position being a cam-engaging position and the other being a cam-disengaging position, and means adapted to secure said arm against rotation on said rod when in the latter position.

18. In a sewing machine, the combination with stitch forming mechanism including a needle bar and a needle carried thereby, a guide frame for said bar, and mechanism for imparting lateral vibratory motion and concurrent shifting to said frame to form a design, of means for feeding a filler to the stitching and for guiding it under each stitch, mechanism for imparting lateral vibratory motion to and concurrent lateral shifting of said filler feeding means comprising a member attached to the machine in the general vicinity of the needle bar, a member supported thereby for slidable movement in a straight line, means for operating said slidable member from said design forming mechanism, and a feeder arm supporting said filler feeding means operably connected with the slidable member.

VICTOR J. SIGODA.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 20 1,136,823 Maier Apr. 20, 1915 1,267,594 Rogers May 28, 1918 2,121,884 Prazak June 28, 1938 2,365,222 Sigoda Dec. 19, 1944

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