US2618231A - Control means for sewing machines - Google Patents

Description

E. P. TURNER CONTROL MEANS FOR SEWING MACHINES Nov. 18, 1952 3 Sheets-Sheet 1 Filed May 5 1950 gin .5 V T M F P M V 1 QZJ 3% m w m 3 WITNESS Nov. 18, 1952 E. P. TURNER 2,618,231

CONTROL MEANS FOR SEWING MACHINES 3 Sheets-Sheet 2 Filed May 5, 1950 7 5 INVENTOR.

Edgar B Turner ATTORNEY WITNESS Nov. 18, 1952 TURNER 2,618,231

CONTROL MEANS FOR SEWING MACHINES Filed May 5 1950 3 Sheets-Sheet 3 IN V EN TOR.

,1 Y Edgar Tin Mr WITNESS. 5 M

Patented Nov. 18, 1952 UNITED STATES FATENT OFFICE CONTROL MEAN S FOR SEWING IVKACHINES Application May 5, 1950, Serial No. 160,271

16 Claims.

This invention relates to improvements in sewing machine control mechanisms, and more particularly in mechanisms for controlling the amplitude of lateral needle vibration of zigzag-stitch sewing machines, although certain features of construction are adapted for employment in controlling other sewing machine components such as presser-bars or stop-motion devices.

A more specific object of this'invention is to provide an improved manually operable means for controlling the amplitude of needle-vibration of an organized pantograph-equipped embroidering machine of the type which is adapted for placing monograms on sheets, towels, garments and the like goods.

With the above and other specific objects in view, the invention comprises the devices, combinations and arrangements of parts hereinafter described in connection with the accompanying drawings which illustrate a preferred embodiment of the invention, from which the several features of the invention and the advantages attained thereby will be readily understood by those skilled in the art.

In the drawings:

Fig. 1 represents a perspective view of a sewing machine and its supporting table in which the present invention is employed.

Fig. 2 represents a fragmentary right-hand end View of the unit disclosed in Fig. 1.

Fig. 3 represents, in a diagrammatic manner, a monogram formed in a piece of work material by means of zigzag stitches.

Fig. 4 represents a front side elevation, partly in section, of a sewing machine employed with the present invention.

Fig. 5 represents a fragmentary rear side elevation of the sewing machine disclosed in Fig. 4 and with the rear bracket-arm wall cover-plate removed.

Fig. 6 represents, on an enlarged scale, a section of a portion of the machine bracket-arm taken substantially in the horizontal plane containing the needle-bar vibrating cam-shaft.

Fig. 7 represents a bottom plan view of the table unit which supports the sewing machine, which view is taken substantially along the line ll of Fig. 2.

Fig. 8 represents a sectional view taken substantially along the line 88 of Fig. 7.

Fig. 9 represents a sectional view taken substantially along the line 99 of Fig. '7.

Fig. 10 represents a side elevational view of a portion of the present control apparatus.

Fig. 11 represents a right-hand end view of the control apparatus disclosed in Fig. 10.

Company, Elizabeth,

Fig. 12 represents, on an enlarged scale, a diagrammatic showing of the various motions imparted to a portion of the control mechanism disclosed in Fig. 11.

Fig. 13 represents a fragmentary view of the under side of the table and illustrates an alternate form of needle-bar control means.

Referring to the drawings, the present invention is broadly employed with a zigzag type sewing machine 14 and a manually controlled pantograph mechanism i5 of which one end portion carries an embroidery hoop I6 for presenting beneath the vibrating needle of the sewing machine the work to be monogrammed. The other end portion of the pantograph mechanism carries a stylus, generally designated by the numeral ll, which the operator'employs for tracing a monogram stencil or pattern which may be presented beneath the pantograph. The movements of the embroidery hoop are directly controlled by the operator through the pantograph and thus the monogram formed in the work by the sewing machine corresponds to the stencil or pattern. For a more detailed description of a related type pantograph and sewing machine unit, reference may be had to the U. S. Patent of Corrall No. 1,328,821, January 27, 1920. A knee-shift lever I8 is provided for enabling the operator to vary the amplitude of lateral needle vibration so that the width of the zigzag seam may be altered during the stitching operation to the end that the mono grammed outline may be of divers widths.

Referring particularly to Figs. 1, 2 and 7, the present invention is incorporated in a table having a substantially flat upper surface I 9 which is provided at one end portion with a conventional sewing machine cut-out 20 for receiving therein the above noted zigzag sewing machine generally designated by the numeral M. This cut-out, and consequently the sewing head, may be set at an angle of 45 with the longitudinal axis of the table in order that the vertical and horizontal runs of the monogrammed work will have the same angle of stitches. In this connection, reference may be had to Fig. 3 wherein a monogram in the form of a letter L is disclosed and designated by the numeral 2 I. This monogram is formed by means of zigzag stitches 2|, and it will be understood that with the machine head I4 disposed at the above noted 45 angle, the vertical and horizontal runs of the monogrammed work have the same angle of stitches. For the purpose of illustration, the distance between these stitches is greatly exaggerated. Mounted directly beneath the table top I9 and upon a shelf 22 carried by table legs 23 is a horizontally disposed pantograph-supporting apron 24 which extends outwardly from beneath the table top !9 in order to expose the stylus-supporting end of the pantograph unit. This stylus-supporting end of the pantograph mechanism is supported directly upon the outwardly protruding apron 24 While the other end portion thereof is carried by the shelf 22 at a location beneath the table level and in vertical alignment with an opening 25 formed within the table surface. An arm 26 extends upwardly from the pantograph and through this table opening and it is provided with a horizontal limb 27 which extends over the table i9 so as to support the en}:-

broidery hoop 16 directly over the sewing machine throat-plate and beneath the needle-bar mechanism. H The upper surface 28 of the protruding apron 24 may be formed from a fiat piece of transparent material directly beneath which and in a rectangular pooket, 29 formed in the apron '24, a pattern or stencilsheet maybe positioned. .The stylusl'l provided on the outwardly protruding end portion of the pantograph maybe tracked about a, given pattern carried in the apron pocket 29 so as 30 ve fecta corresponding movement of the embroidery hoop, 16 to theend that the sewingmachine will produce a monogram of predetermined shape e g A 4 a The above noted protruding apron 24is slidably mountedontrackelements 30 carried directly upon the shelf 22 so that it may be manually shiftedcrosswiseeof thetable. This movement of th apron, which carries the stylus-suppor nel nd o .t e.;pan srap is effective to alter th pattermto-momgram ratio. r An aperturedindexing plate generally designated by the numeral 3|, is provided ,at the right-hand end portion ofthe apron and a manually operable locking pin 3.2. isprovided upon the shelf 22 for the purposeoflocking the plate .3] and consequently th aprong l, in any one of several prede fl h h w enrhnnoshiona 7. M ans. .notherein i s arepr vi edineach of the two end portions of thepantographunit for locking such ends respectivelyto the apronuand to theshelf, h by 9 e ect a. rel tiveadjustment of the two eh qj r hh ends 11m h. t e sh t oflthe The specific construction details of the apron.24, together with the pantographunit [dare not a D ft of the present invention and thus need not be cr bed n deta l- 1 7 r The above noted sewing machine l4 comprises a flatb'ed 33 aifording a work support, and from one end of which-rises thehollow ,standard' 34 of a bracket-arm 35 overhanging the bed-plate and terminatingin a headjfi closed at its outer end by a" detachable faceplate 3?. A l 7 Referring particularly to Eigs. 4, 5 and 6, there is rotatably'j'ournaledin suitable bearings provided in the bracket-arm 3- 5 a horizontally disposed main-shaft 38 extending lengthwise of the bracket arm and carrying at one end a driving, pulley 39. At its otherend the main-shaft carries a' counterbalanced crank 4% provided with a crank-pin 4| luponwhioh is pivotally mounted a splitsleeve 42 having depending spaced ears 43 between which the upper end of a needle bar reciprocating link M is pivotally mounted for swinging movements about anaxis transverse to the axis of the main-shaft 38. The lower end portion of the linlr is; pivoted between the 'upstanding spaced ears 45,0f asleeve 46 journaled. upon a stud 4! extending parallel to the mainshaft 38 from a collar 48 suitably secured upon a vertically disposed needle-bar 49.

4 Y The needle-bar 419 carries at its lower end a needle 50 and is journaled for endwise reciprocation in suitable bearings provided upon a vibratory gate 5|. The flattened upper end of the gate is disposed within the vertically slotted lower end of a supporting member 52 carried by the head 36. Thus, the gat'e isg'pivotally mounted in the usual fashion for'swi'nging about a pivotal axis substantially tranverse to the axis of rotation of the main-shaft 38. The lower end of the gate 51 is slabbed so as to provide opposed fiat walls 53 slidably disposed within appropriate guidevwalls formed .in the slotted lower wall of the bracket-headjfi, which construction confines the swinging movements of the gate 5| in a vertical plan which in the present case also contains the axis of rotation of the shaft 38.

Extending horizintally from the lower end of the vibratory gate 5| is an arm 54 of which the free end at, the sideof ,thebracket-"arm headlcarries arivht b o k, 5'5.,;Embr c ne.the. p-iv,ot .b1cck 5.5 is the forked e dpf amok-arm 56..1d pendine from t e front en o a shor l chhaft 3 .115118 n s d. hor onta y. an ve se top he. ma n .shaft 3a andsuit my li rn le attheun ersidec hebrecket-arm he diti Ex en i upwardly from the .roek-s aftfill t .the' reerw rdl e e h d. 3.6. is a ck-unlit ro l-lwhi hkthe f nd. i onne e by a vo screwv 53 to Q e ndp a pit a 60. d sp sed. hori on all hdtext i e etth re rw r .s ehf-thehre ke m 35- he er ndl fl h pit 'he i iha Qrk..-9 h El an e n throu a sl l hn ui 6 formed at the outward side oftherear-wall of he v h h n lt w l e nders ood hat't oke end o h pi mahfli disp e e ndi eerwa dly Q the racket-arm. l-. .A coverlete timer.be m l diqren n h fo k endof the pitinan GIL The yokeel of the itman emb aces-a mi dis s dw nt r ck reeess. This cam 64 has a flange 65.between which the pitman is laterally confined. The cam 64 is suitably secured upon the rearward end of the cam-shaft B6 journaledwithin he front and r eri lh of. herhrec t rm 3 A shaft collar Gl housedina recess 68- in the front side of he brack t-ermhon .t e am ha 6 against endw semhvem h A s ir gear E9 carried Joy-the main-shaft; drives a spiral gear 0 upon the 9am haft Where vthela ter is rotated at one-half the speed of rotation of the main-shaft 38. Fromthe foregoingflt will be understood that during theoperation of the machine,.the earner vibratesthe pitman 60 laterally about its pivot screw 59 and thatthe needle 50 performs one complete reciprocation for each directionvof lateral throw of the pitman.

\In order, to translate the otherwise idle; lateral vibratory movements of' the pitman 60 into-e f,- fective ndwise reciprocatory movements thereby to mp Sw n ng v m n sto th ee le-ba gate t k id 9 9! 1,! ie-fsh tehl secure u o the Pi heh at s. s d and..adiacent. the yolre member. Theguidqroller 'H is received ithin a guidewey. UQQQhStiWEdhvthe rearwardly opening slot formed in the latter, or rear-- ward exposed face or guide head 13 extending into the bracket-arm 35 The guideway is segmental, the center of curvature, thereof in one position of theguide head 13 lyingin the pivotal axis of the. pitman '60 afforded by its'pivotal connection with .thesrock-arm 58. g" Theguide head 73 lhas a hubflltl extending through an aperture 'l5'in the bottom wall of the bracket-arm cavity, said hub being "secured bya set screw I4 upon an adjusting shaft I8 disposed parallel to the cam-shaft 66 and having the longitudinal axis in substantialy the horizontal plane containing the axis of rotation of the cam shaft. The guide head hub I4 abuts against the end of a bearing bushing I8 suitably secured in the front wall of the bracket-arm 35 and affording a bearing for the adjusting shaft I8. Secured by screw I9 upon the adjusting shaft I6 is a manually operable member 88 in the form of a lever arm. The throw of the arm 80 is limited in one direction by a stop screw 8I adjustably secured within an apertured ear 82 mounted directly upon the bracket-standard 34 to locate the guide head in its zero position so as to position the guide head in a manner whereby the guideway I2 is concentric to the pivot screw of the pitman 6I. Thus, the pitman may perform idle lateral vibrations and the needle-bar gate 5i will remain stationary during the operation of the machine. Movement of the lever 89 from its zero position is adjustably limited by an opposed stop screw 83 threaded into another ear 84 also carried upon the bracket-arm 35. It will be understood that when the lever 88 is moved from its zero position toward the stop screw 83, the guide head is angularly adjusted into position such that, during the operation of the machine, the travel of the guide roller H in the guideway I2 effects endwise reciprocation of the pitman 6|, thereby imparting lateral vibratory movements to the needle-bar gate 5|. A coil spring 85 has its upper end secured to the lever 88 for biasing the latter into engagement with the lower stop screw 8| while the lower end portion of the spring is secured to the bracket-arm as by a pin 85. Thus, the spring urges the needle-bar control mechanism into a null position so that the needle-bar will reciprocate in a fixed vertical path.

The above noted knee-shift lever I8 is in the form of a substantially inverted L-shaped crank, the horizontal limb 8B of which is journaled within a pair of apertured brackets 81 and 88 which are respectively secured directly to the adjustable apron 24 and to the shelf 22. Also mounted on the apron 24 is a substantially U-shaped bracket 89 which, as may be best observed from Fig. 2, functions to embrace a portion of the knee-shift lever so as to prevent the latter from shiftin endwise within its journal bracket 81. This lever I8 is adapted to be operated by an operators knee.

Referring particularly to Figs. 1, 4, '7 and 8, the free end portion of the lever arm 89 has pivotally connected thereto the upper end portion of an extension arm 90 the lower end portion of which extends through an aperture 9| provided in the sewing machine bed-plate 33 so as to permit its extreme lower end portion to project below the surface of the table. Means hereinafter described are provided for connecting the lower end portion of the member 90 to the knee-shift lever. Thus, the operator may vary the amplitude of the lateral needle vibration during the operation of the machine by means of the knee-shift lever I8 to the end that the width of the zigzag seams may be altered. In this connection, reference may be had to Fig. 3 wherein a monogram is illustrated as a letter L. It will be observed that the width of this letter varies throughout its length so that in order properly to form such a letter by means of stitches it will be necessary to vary the amplitude of lateral needle vibration. Thus, the present invention contemplates the provision of a mechanism which may be controlled by the above noted knee-shift lever I8 so apron 24. relative to the shelf unit 22.

that a movement of such lever will vary the amplitude of lateral needle vibration.

As hereinabove noted, the operator may vary the pattern-to monogram ratio by shifting the This movement of the apron also varies the knee-shift linkage system so that the ratio of movement of the knee-shift lever I8 relative to that of the needle control lever 89 may be altered and the maximum throw of the needle is made to vary with the monogram size while the knee-shift lever is still adapted to be moved in accordance with the pattern size.

More specifically, the present knee-shift linkage system comprises a horizontally disposed shaft 92, the opposite end portions of which'are journaled in the end portions of a box-like bracket generally designated by the numeral 93. Referring particularly to Figs. 2 and 7, this bracket 93 may be secured to the upper leg channel member 94 by means of bolts 95, 95. It is to be understood that the shaft 92 is disposed in parallelism with the knee-shift lever 86. Carried at the opposite end portions of the shaft 92 are a pair of arms of unequal length which are connected together at their free end portions by means of a rod 98 which overlies and engages a crankarm 91 carried by the horizontal limb 89 of the knee-shift lever. The shorter of these two arms is designated by the numeral 98 while the larger one is designated by the numeral 99. Thus, in effect, the arms 98 and 99, together with the inclined rod 98, form a crank which engages the crank 91 so as to transmit motion from the kneeshift lever I8 to the shaft 92. Furthermore, the rod 96 forms a, substantially inclined cam portion of this crank so that when the knee-shift lever I8 is rotated relative thereto the effective lever arm ratios between such cranks will be varied. Referring particularly to Figs. 10, l1 and 13, it is to be understood that the short arm 98 is provided with a crank element I99 which, in one form of the present invention, is adapted to underlie directly the lower end portion of the depending connecting element 98. The above noted coil spring functions to bias the lever 80 together with the connecting element downwardly thereby to force the lower end portion of the element 90 into operable engagement with the underlying crank I09. Furthermore, a spring IIlI embracing the rear end portion of the kneeshift lever 88 functions to bias this lever about its longitudinal axis and in a clockwise direction as viewed in Fig. 1. More specifically, one end portion of this spring is secured by means of a pin I92 to the knee-shift lever 86 while the other end portion I83 embraces the bracket 88 so as to bias the lever arm 89 in the clockwise direction.

The inclined rod 96, carried by the two depending arms 98 and 99 forms, as above noted, an angle with the knee-shift lever 86 and thus when the apron 29 is shifted relative to the shelf 22 the crank arm 91 and the rod 96 are moved relative to each other to the end that their effective lever ratios are varied. Thus, an increment of movement of the knee-shift lever 86 about its longitudinal axis can produce various increments of movement in the depending connection element 90 depending upon the amount of lengthwise adjustment of the knee-shift lever arm 88 relative to the inclined rod 9%. From the above, it will be appreciated that a rotary movement of the knee-shift lever 88 about its longitudinal axis from its zero position will be effec- 7 tive; to. operate. the above noted: lever. arm; 8.0 which, in turn, iunctionsatdcontrolzthe amplitude Ofi lateralneedle; vibration;- As the;movement:.of the knee-shift lever:.arm- 8.6.: is. increased. in. a counterclockwise;direction asiviewedi in Fig. 1,,t-h-e lever arm; 80f wi1l,.be.-shifted also lira-counterclockwise direction so astov increasethe amplitude of lateral needle'rbar. vibrations, frourzero to a. maximum; Also, if: the knee-shift leverr 8.6; s movedendwise of itself itzwill. function toalter. theieifective'lever ratio between its; crank portion 9.! and; the inclined rod 9Irso. that a given amplitude of rotary motion of theknee-shiftdever will produce various selective amplitudes of lateral needle bar vibration. V

For a more complete; understanding of this. adjustable linkage system, reference may be had to F'igs 1 0, 11 and 12. Reierringfirst'toF-ig 11', the solid. lines: illustrate the knee-shif-t-lever- 86 in its nullor 7 zero position,- whilethe. dotted lines illustrate thismember in its maximum position of rotary movement. Itwill. be notedthat. this rotary movement of the lever arm will produce acorresponding rotary-movement of the crank lflfifwhich functionsto liftv thedepending connecting element 9Ilwhich projects. through the supportingtable (see-Fig. 13). A1so, Fig. 11 illustratesthe arm 98 as having a, single aperture A04 for receiving the headedend of the-rod96 while the arm flfl isprovided. with a. plurality of apertures I95 for receiving the. other end ofthe: rod. Thus, therod- 95may have its lower end portion inserted-in any one of the several apertures I to the end that. its angle relative to its axisof. rotation. may be selectively varied.

Referring particularly-to Fig. 12; there-is illustrated. diagrammatically the eifctwhich the lengthwise adjustment of the'leverv arm 86. has upon the. movements ofithe. crank element I00. The solid'lines illustrate the member 91in its zero position while. the dotted lines represent this member at theend portionof a given. amplitude of motion- Also illustrated. in this. view is the rod. 56;. which when the crank 91' is. turned through .a given amplitude to a position-represented, by the dotted. lines, moves, through. an, angle A to. a secondary position designated'by the dottedcircle'fifi'; However, if th'elever. arm crank 86 is shifted. to a dotted position, as; illustrated in Fig, then the cranksTwilllfun'ction to shift the rod Stthrough angle 3; which latter angle is appreciably greater than the angle AL The initial and final positions of the rodfifiwhen moved'through angle B: are designat'ed'by. the dotted circles designated respectively by thenumerals 96"" and 96". From this itwill be readily appreciated that by shiftingthe knee-shift'lever 86 lengthwise of itself an adjustment in the link'-. age system willbe effected whereby a given'ame. plitude of rotary motion of the knee-shift lever may be made'to produce various selective ampli-. tudes of motion within the crank IIlII.

As. hereinabove noted, the; first form of the;

present invention contemplates theprovisionof' a table top which is, provided at oneend portion with a cut-out. 20 formed at 45. to the longitudinal axis of: the table. This cut-out'and; conse' quently, the. sewing head, are-.setiat this145-so' that the vertical and horizontal runs of" the: monogram work will have. the same angle ofstitches. Experiments with this type ofunit-indicate that unless relative rotationbetween'the work and the sewing head can be produced about the null or vertical axis vofithe sewing ;needle,' manygstyles of monogram letters cannot be. prop we produced. In other words, to produce a 8 properimonogramzinsomea instances it is-anece'sa sary tohave the; direction'ofzthe sidewiseneedle vibrations disposed ."at' a: .substantial. angle to the longitudinal axis of. each limb: of; a monogram letter. In view. of; this. situation. a: second form Ofl the presentinvention; contemplates the: pro.- visiori of means whereby: the. sewing. machine head-,may: be rotated aboutthe-null axisof its needle;

More; specifically,- andv referring particularlyt to. Figs; 1;? and 8, the top. of the present table. I9 may be, providedwith'apircular aperture I05 in whichis-rotatably mounted, in any suita-ble manner; a; turntable Iflfihavingacut-out- 20-1for-receivingj therein the sewing head I4. Projecting upwardly from the turntable platform IE6 at a location adjacent the work-supporting end of. the sewing-machine is a handle III-ii by meansof whichv an operator may swing the turntableand head, into any desiredangular location relative to the work. The cut-out I05 is so located within the turntable that the .null or vertical axisof. the needle corresponds with the center of rotation of; the turntable.

This second form ofthe invention necessitates an alteration in the variable needle throw control mechanism described hereinabove. Dueto the factthat the machine sewing headis turnable about its-vertical needle axis, provision-has to be made for properly transmitting the motions of they knee-shift lever, which is carried upon the stationary table unit; to the needle throw adjusting lever which'is carried upon the rotatable sewing head.

In the second form of this invention shown in Figs. 7, 8 and 9, thismotion-transmitting system comprisestwo horizontally, disposed interengaging fulcrum levers Hi9 and III). The first of these levers is provided with a transverse shaft element III which is pivotally. mounted in brackets IIZ; IE2 secured. directly tothe turntable so-that. the member I09 is bodily rotatable with the turntable. In this formofthe invention, the free end portion of the fulcrumlever I09 is disposed directly beneath the lower end portionofthe connecting. element so as to .be engageable therewith. Also, the fulcrumlever I 09. is disposed lengthwise of the. sewing. head. so that. its-intermediate portion intersects the null axis. of the. needle, .which-nulllaxis. is designated by the. numeral H3.

The second-fulcrum lever. IIil-is also provided with ashort transverse shaft: H4. whichis pivotally. mountedin brackets I I 5;. I I 51 secured directly to the undersurface ofthe table I9. This second .fulcrum member is disposed so thatthe intermediate portion thereof will intersect the null axis- H3 of r the needle andunderlie and engage-anintermediate portion of the member I991 The free end-portion'of the fulcrum lever IIBis engaged-and supported by a crank element IElIi which:is'secured-directly torthexarm 98:.oftheadjustable; crank system. In other words; the crank: I 93' employed in" thefirst'. form of 'the. invention .is-reliminated and in lieu .thereof: the. crank. I 606 is. provided'in its. place. From thezabove; it' will be understood that rotarymovsments. of the knee-shift lever 86 will'be imparted to.the-orank arm. I00 through the above described adjustable crank system andthese movementswill be faithfully transmitted tothe depending link- 90 by means of the 'interengagingfulcrumlevers- I69 and I I0 Glearly, anyrotation 'of the-sewinghead= I land the platform I 06 about .the null "axis I I 3-wil1 'not disturb the eif ec tiveness of this motion-transmitting system. Thus, an operator may, by operating the kneeshift lever about its pivotal axis, vary the throw of the needle during the operation of the machine to the end that the width of the zigzag seams may be altered. Furthermore, by shifting the knee-shift lever lengthwise of its axis of rotation, the operator will effect a change in the ratio of the rotary knee-shift movement relative to that of the needle throw control lever 80 so that a predetermined amplitude of rotary kneeshift lever movement will produce various selective amplitudes of movement of the needle control lever 80.

In order to form a proper foundation for the terminology employed in the accompanying claims, we hereby state that the present invention broadly provides a sewing machine operative mechanism, such as a needle vibrating mechanism, and manipulative means for controlling the action of the operative mechanism and. including (1) an element 80 which is adapted to be selectively actuated through various'amplitudes. of movement for thus controlling the operative mechanism, (2) means including a manually operable lever arm I 8 for actuating the element 80, and (3) manually controlled adjustable means such as the inner engaging motion transmitting cranks 96 and 91, operatively connecting the lever arm [8 with the element Bil whereby a predetermined amplitude of movement of the lever arm is can be selectively made to produce various amplitudes of movement of the element 80. The manually operable lever arm l8 also functions as a manually operable means for adjusting the cranks 96 and 91 relative to each other so as to alter the effective lever ratio therebetween.

Having thus set forth the nature of the invention, what I claim herein is:

l. A sewing machine having operative mechanism carried thereby, manipulative means for controlling the action of said operative mechanism and including an element which is adapted to be selectively actuated through various amplitudes of movement for thus controlling said operative mechanism, means including a manually operable lever' arm for actuating said element, and manually controlled adjustable means operatively connecting said lever arm with said element whereby a predetermined amplitude of movement of said lever arm can be selectively made to produce various amplitudes of movement of said element, said adjustable means including a pair of interengaging motion-transmitting cranks of which one is mounted for independent adjustable movement relative to the other whereby such adjustment will alter the effective lever ratio therebetween, and manually operable means for so adjusting said adjustable crank.

2. A sewing machine having operative mechanism carried thereby, manipulative means for controlling the action of said operative mechanism and including an element which is adapted to be selectively actuated through various amplitudes of movement for thus controlling said operative mechanism, means including manually operable lever arm for actuating said element, and manually controlled adjustable means operatively connecting said lever arm with said element whereby a predetermined amplitude of movement of said lever arm can be selectively made to produce various amplitudes of movement of said element, said adjustable means including a pair of interengaging motion-transmitting cranks each being turnable about a fixed axis of rotation and one having its surface of crank engagement inclined relative to its axis of rotation whereby a relative adjustment of said cranks lengthwise of their axes will alter their effective lever ratios, and means for adjusting one of said cranks relative to the other lengthwise of its axis of rotation.

3. A sewing machine having operative mechanism carried thereby, manipulative means for controlling the action of said operative mechanism and including an element which is adapted to be selectively actuated through various am" plitudes of movement for thus controlling said operative mechanism, means including a manually operable lever arm for actuating said element, said lever arm being mounted for rotation about and movement lengthwise of a predetermined axis, and manually controlled adjustable means operatively connecting said lever arm with said element whereby a predetermined amplitude of rotary movement of said lever arm can be selectively made to produce various amplitudes of movement of said element, said adjustable means including a pair of interengaging motion-transmitting cranks each being turnable about a fixed axis of rotation and one having its surface of crank engagement inclined relative to its axis of rotation whereby a relative adjustment of said cranks lengthwise of their axes will alter their effective lever ratios, and means connecting one of said cranks with said lever arm whereby such crank will be both rotated about and shifted lengthwise of its axis of rotation in synchronism with the like movements of said lever arm.

4. A sewing machine having, an endwise reciprocatory and later-ally vibratory needle, automatic means for reciprocating said needle endwise of itself, automatic means for laterally vibrating said needle, means for selectively varying the amplitude of lateral needle vibration including a pair of interengaging motion-transmitting elements of which one is mounted for independent adjustable movement relative to the other whereby an adjustment of such adjustable element will alter the amplitude of motion transmitted from one of such elements to the other,

and a manually controlled member shiftable in a first direction for operating said interengaging elements thereby to alter the amplitude of lateral needle-bar vibration and being shiftable in a second direction to adjust said intereng-ageable elements relative to each other.

5. A sewing machine having, an endwise reciprocatory and laterally vibratory needle, automatic means for reciprocating said needle endwise of itself, automatic means for laterally vibrating said needle, means for selectively varying the amplitude of lateral needle vibration including a pair of interengaging motion-transmitting elements of which one is mounted for independent adjustable movement relative to the other whereby an adjustment of such adjustable element relative to its associated element will alter the amplitude of motion transmitted from one of such elements to the other, a manually controlled member connected to one of said'elements for actuating the same thereby selectively to vary the lateral needle vibration, and manually controlled means for effecting an adjustment of said adjustable element relative to its associated element thereby to cause a predetermined amplitude of movement of said member to produce various selective amplitudes of lateralneedle vibration.

6. nsewing machine having, a;n endwiserecipr'ocatory and laterally vibratory needle, automatic means for reciprocating said needle endvvise of itself, automatic means for laterally vicrating said needle, means for selectively varying the amplitude of lateral needle vibration including a pair of interengaging motion-transmitting cranks of which one is mounted for independent adjustable movement relative to the other whereby an adjustment of such adjustable crank relative to its associated crank will alter the effective lever ratios therebetween, a manually controlled member connected to'one ofsaid cranksfor actuating the same thereby selectively to vary the-lateral needle vibration, and manually controlled means for effecting an adjustment of said adjustable crank-relative to its associated element thereby to cause a predetermined amplitudeof movement; of said member to produce various selective amplitudes eflateral needle viibmliifll o A in ..ma hi ha in e v se rei r ca o a d lateral v r r n dle a matic means for reciprocatingnsaid needle endvvise of itself, automatic;means ;ior;laterally vibrating said needle, means f crselectively-varying the ampl udeo later l need e ib ation ,ine u in ,a pa r 10f in erens si o -t a smitting cranks each beingturnable about a fixed axis of rotation and cne having its surface of crank engagement inclined relative to its ,axis of rotation whereby a relative adjustment of said cranks lengthwiseof their axes will -alter their effective lever ratios, a manually controlled member connected to one of said cranks for; turning theasame abou ts x therebv select ve to vary thelateral-needle vibration, and manually controlled means foreffecting a relative; adjustment of said cranks lengthwise ,Of their axes thereby tocause a predetermined amplitude of movement of said member to produce various Sel ctive amplitudes of lateral needle vibration.

8.;Asewing machine having, an endwise re- ;ciprocatory and laterally vibratory needle, automatic' means for reciprocating said needle endwise of itself, automatic ;means for laterally -:vibrating said needle, means for selectively vary- ;ing the amplitudecflateral needle vibration including a pair ;of interengaging motionetransmitting cranks each beingturnableabout a fixed axis of rotation and one having its surface of :crank engagement inclined relative to its axis of rotation whereby a relative adjustment of said cranks lengthwise of their axes will alter their effective lever ratios, and a manually controlled :member connected to -one of said cranks for turning the sameabout its axisthereby selecheir to vary-the lateral n edle "Vibration, said .ua l co tr lled :member fleeing shiftable lest wis fi i self :for enactin in .resp Qnse to the len h se movement thereon-a relative adjustment of said cranks lengthwise of their axes t reby to ca se a predetermined amplitude .of rotary movement of said member :topro duce varii -fI' e comb n ion o r table, ;a:; ewin .ma-

chin mo ed u on said ab e and ha in a icndwise recirrocater and .lateraflv v br tory ,needie, automatic means carried by the machine head for reciprocating said needle endwise cf 12 inc m ti n-tra smitting1.-rct r cran s carried byand disposed beneath said table, one of said cranks being mounted for independent adjust- .a'ble movement relative to the other whereby an adjustment of such adjustable crank relative to its associated crank will alter the degree of mo tion transmitted from one of such cranks to the other, means connecting a first of said cranks to the needle vibrating mechanism, a manually controlled member located beneath said table and connected tocthe second of said cranks for actuating the same thereby selectively to vary the lateral needle vibration, and manually controlled means for effecting an adjustment of saidadjustable crank relative to its associated crank thereby to cause a predetermined amplitude of movement of said member to produce various selective amplitudes of lateral needle vibration.

10. The combination of a table, asewing machine mou te ,upon said; table andv hav n an en wise reciproca r and later ll vibrato y n ed e,automaticmeans carri d by th m chine head 'for reciprocating said needle endwise ;of itself, automatic means; carried by the machine head for laterally vibratingsaid needle, means second one of said 'cranksfor turning the same about its axis of rotation thereby selectively to vary the lateral needle vibration, said knee-shift lever being shiftable lengthwise of itself for effecting, in response to the lengthwise movement thereof, a relative adjustment of said cranks lengthwise of their'axes thereby to cause a predetermined amplitude of rotary movement .of said knee-shift lever to produce various selective amplitudes of lateral needle vibration.

11. The combination of a table, a platform rotatably mounted upon said-table, a sewing machine head carried upon said platform, operative -mechanism carried by thesewing machine head,

manipulative means for controlling the action of said operative mechanismand including an element extending from said head to a location beneath said platform, said element being dis- .posed at one side of the axis of platform rotation so as to berotatable thereabout, a manually operable lever arm privotally mounted beneath the table surface, and meansoperatively connecting said element with said leveriarm whereby a turning movement of therlatter Will function to actuate said element and thu control said operative mechanism, said last mentioned means including a fulcrum ,lever .operatively connected with saidelementandpivotally mounted on-said platform so as to be bodily rotatable therewith, and means including a crank member connected with said lever arm and engaging said fulcrum lever at a point located along the axis of plat- :o m r tatio 12 The combination of a table, a platform rotatably mounted upon said table, a sewing machine head carried upon said platform, operative mechanism carried by the sewing machine head, manipulative means for controlling the action of said operative mechanism and including an element extending from said head to a location beneath said platform, said element being disposed at one side of the axis of platform rotation so as to be rotatable thereabout, a manually operable lever arm pivotally mounted beneath the table surface, and means operatively connecting said element with said lever arm whereby a turning movement of the latter will function to actuate said element and thus control said operative mechanism, said last mentioned means including a pair of interengaging fulcrum levers of which one is operatively connected with said element and pivotally mounted upon said platform so as to be bodily rotatable therewith while the other is operatively connected with said lever arm and pivotally mounted upon the table proper, said two fulcrum levers engaging each other at a point located along the axis of platform rotation.

13. The combination of a table, a platform rotatably mounted upon said table, a sewing machine head carried upon said platform, operative mechanism carried by the sewing machine head, manipulative means for controlling the action of said operative mechanism and including an element extending from said head to a location beneath said platform, said element being disposed at one side of the axis of platform rotation so as to be rotatable thereabout, a manually 0p erable lever arm pivotally mounted beneath the table surface, and means operatively connecting said element with said lever arm whereby a turns ing movement of the latter will function to actuate said element and thus control said operative mechanism, said last mentioned means including a pair of interengaging fulcrum levers of which a first has its one end pivotally mounted upon said platform so that it is bodily rotatable with such platform while its other end portion is operatively connected with said element, the second of said fulcrum levers having its one end pivotally mounted upon said table While its other end portion is operatively connected with said lever arm, said two fulcrum levers engaging each other at a point located along the axis of platform rotation.

14. The combination of a table, a platform rotatably mounted upon said table, a sewing machine head carried upon said platform, operative mechanism carried by the sewing machine head, manipulative means for controlling the action of said operative mechanism and including an. element extending from said head to a location beneath said platform, said element being dis said element with said lever arm whereby a turning movement of the latter will function to actuate said element and thus control said operative mechanism, said last mentioned means includin a pair of substantially horizontally disposed interengaging fulcrum levers of which a first has its one end pivotally mounted upon said platform so that it is bodily rotatable therewith while its other end portion is operatively connected with said element, the second of said fulcrum levers being disposed beneath said first fulcrum lever and having its one end pivotally mounted upon said table, said two fulcrum levers engaging each other at a point located along the axis of platform rotation, and a crank element connected with said lever arm and underlying and engaging the free end portion of the second fulcrum lever.

15. The combination of a table, a platform rotatably mounted upon said table, a sewing machine head carried upon said platform, operative mechanism carried by the sewing machine head, manipulative means for controlling the action of said operative mechanism and including an element extending from said head to a location beneath said platform, said element being disposed at one side of the axis of platform rotation so as to be rotatable thereabout, a manually operable lever arm pivotally mounted beneath the table surface, and means operatively connecting said element with said lever arm whereby a turn ing movement of the latter will function to actuate said element and thus control said operative mechanism, said last mentioned means comprising a fulcrum lever operatively connected with said element and pivotally mounted on said platform so as to be bodily rotatable therewith, means including a crank member operatively connected with said lever arm and engaging said fulcrum lever at a point located along the axis of platform rotation, and means for varying the effective lever arm ratio between said lever arm and said crank member so that the ratio of movement between said lever arm and said element can be selectively varied.

16. A sewing machine having, an endwise reciprocatory and laterally vibratory needle, automatic means for reciprocating said needle end- Wise of itself, automatic means fo laterally vi-- brating said needle, a manually controlled mem ber connected with said last mentioned automatic means for selectively varying the amplitude of lateral needle vibration, a pair of lnterengaging motion-transmitting rotary cranks interposed between said last mentioned automatic means and I means connected with said adjustable crank for REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 709,310 Eves Sept. 16, 1902 880.133

Fink Feb. 25, 1908

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