US1338074A - Embroidery-sewing machine - Google Patents

Description

e. M. EAMES AND J. s. FINCH.

EMBROIDERY SEWING MACHINE.

APPLICATION FILED MAY 24,:9l'6.

1,33 ,07 Patented Apr. 27,1920.

6 SHEETSSHEET I.

W/ T/VESSES: I INVEN TORS Geoiyegzl cgames 246%. im gym/z.

ATTORNEY G. M. EA'MES AND J. s. FINCH.

EMBROIDERY SEWING MACHINE.

APPLICATION man MAY 24. 1916.

1,338,074. S Patented Apr. 27,1920;

- s SHEETS-SHEET 2.

WITNESSES: IN VE IV TORS .Gewyem. $02105 K05. Saw/aw Jam .JfZ'nc/L.

yaw/11 I WW0 A TTOR/VEY G. M. EAMES AND J. S. FINCH.

EMBROIDERY SEWING MACHINE, APPLICATION FILED MAY 25. 1916- 1 f I J k a 3 v E M A 7 Q I y a H Ma "E m J WITNESSES: mmvrons I v I eoiyq m'a/nws 4%? M Jiwg i 7221020.

. A TTORNEY Patented pr. 27, 1920.; I '6 sugars-shin 3.

G. M. EAMES AND J. S. FINCH.

EMBROIDERY SEWING MACHINE.

APPLICATION FILED MAY 24. 1916.

1,338,074. Patented Apr. 27, 1920.

' 7 6 SHEETSSHEET 5.

W/T/VESSES: G lm/7siuzrogs eoifye am 934% Jizrg gfiiiwh.

A TTORNEY e. M. EAM'ES AND]. S. FINCH.

EMBROIDERY SEWING MACHINE. APPLICATION min MAY 24. 1915.

1,3 7 I Patented Apr. 27,1920.

I la 6 SHEETS-SHEET 6.

WIT NESSE 8: 'INVENTORS ATTORNEY UNITED STATES PATENT OFFICE.

GEORGE M. EAMES AND JOHN S. FINCH, OF BRIDGEPORT, CONNECTICUT, ASSIGNOBS TO THE SINGER MANUFACTURING COMPANY, A CORPORATION OF NEW JERSEY.

EMBROIDERY-SEWING MACHINE.

To all whom it may concern."

Be it known that we, GEORGE M. EAMES and JOHN S. FINCH, citizens of the United States, residing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improve ments in Embroidery-Sewing Machines, of which the. following .is a specification, reference being bad therein to the accompanying a given embroidery design controlled to effect variations of such design, but it is believed that it is new to automatically effect a multiple of given designs without any changein the construction or combination of the elements comprising such means.

The present invention comprises im proved means, over that employed in the embroidery machine construction represented by United States Patent No. 1,196,534, August 29, 1916, to Eames and Finch, for automatically effecting, by a iven construction, a greater range of emiroidery designs than is possible by any construction known to applicants at the present time.

Referring to the drawings, Figure 1 is a view in front side elevation of a sewing machine embodying the present invention. Fig. 2 is a top plan View of Fig. 1. Fig. 3 is a view in rear side elevation of Fig. 1, the arm-bracket and bed-plate being slightly broken away to better illustrate the feed-dog actuating mechanism. Fig. 4 is a view in front side elevation illustrating the main portion of the arm-bracket and bed-plate in section. Fig. 5 is a detached View of the means for actuating the pattern-cam and certain of the. needle controlling elements, later to be referred to, actuated by said cam, together vwith dotted line View of the rear end of the sewing machine frame. Fig. 6 is an under side view of Fig. 1. Fig. 7 is Specificationof Letters Patent.

Patented Apr. 27, 1920.

Application filed May 24, 1916. Serial No. 99,490.

a plan view of certain elements comprising theneedle controlling mechanism, later to be referred to. Figs. 8 and 9 are views on the lines a-a and bb, respectively of Fig. 5 looking in the direction indicated by the respective arrows. Figs. 10 to 15, both inclusive, are detailed views to be referred to hereafter, and Fig. 16 is a view of certain of the embroidery designs and variations of the latter, common to the products of the present improved means.

Referring to the figures, 1 represents the bed-plate of the sewing machine upon which is mounted the bracket-arm comprising the arm-bracket 2 and standard 3, 4 the main or needle-bar driving shaft provided at its rear end with a band-wheel 5 and at its opposite end With a shaft flange 6 to which is pivotally connected the needle-bar actuating link 7 operatively connected with the needle-bar 8 carrying the needle 9, 10 and 11 the needlethread tension and take-up, respectively, 12 the cloth-presser carrying-bar and 13 the cloth-presser. The needle carrying bar 8 is mounted to move vertically in the needlebar carrying frame 14 pivoted at its upper end on a stud-bolt 15 threaded into the bracket-arm, and 16 represents the presser lifting lever for moving the cloth-presser vertically to accommodate the positioning .of the fabric with respect to the line of formed at the under side of the bed-plate and having formed integral with it the bearing lugs 18 and 19 into which is threaded the bolt 20 secured against accidental movement by a nut 21, and upon said bolt is pivoted a feed-dog carrying bracket 22 provided with a feed-dog 23, the opposite end of said shaft being connected by an arm 24 with a feed connection 25 whose upper end embraces the usual feed connection eccentric (not shown) carried by the mainshaft, thus transmitting from said last mentioned shaft feed movements to the feeddo 2% represents the feed lift rock-shaft mounted in the manner of shaft 17 and carrying at its forward end an arm 27 pro-' vided with a stud-screw 28 carrying a slideblock 29 which engages the usual slot formupper end embraces a feed lift eccentric 34' carried by the'main-shaft and from which vertical movements are transmitted to the feed-dog.

35 represents a spiral gear carried by the main-shaft 4 said gear meshing with a spiral gear 35' carried by a cam-shaft 36 mounted at one end in a bearing 37, shown in dotted lines only Fig. 7, formed in the bracket-arm and at its opposite end in a suitable bearing formed in a bracket-arm plate 38, said gears being of the ratio of 2 to 1, thus giving to the cam-shaft 36 one rotation to two rotations of said main-shaft. On the cam-shaft is mounted a needle vibrating cam 39, to be referred to hereinafter.

40 represents a rotary loop-taker actuating shaft mounted in suitable bearings depending from the sewing machine bed-plate and carrying at its forward end a spiral gear 41 which meshes with a like gear 42 secured on the rotary loop-taker shaft 43, the latter being mounted in the usual manner below said bed-plate and carrying a loop-taker 44. Upon the rear end of the shaft 40 is secured a belt driven pulley 45 operatively connected by a belt 46 with a belt driving pulley47 carried by the mainshaft, said belt-driving and driven pulleys being of the ratio of 2 to 1, thus giving to the loop-taker two rotations to one rotation of said main-shaft.

48 represents a sleeve loosely mounted on the shaft 40 and held against lengthwise movement by collars 49 and 50, said sleeve having formed integral with it a bearing hub 51 upon-which is pivoted one end of the loop-taker actuating shaft link 52, the opposite end of said link being pivotally attached to the lower end of the loop-taker actuating shaft shifting lever 53, the latter mounted to oscillate on a bearing stud 54 secured in the standard 3 and pivotally connected at its upper end with the shifting lever connection 55 pivotally attached to the needle carrying frame connection in the form of a vibratory lever 56.

The means herein employed for controlling the amplitude of movement of the feed- 58 represents a pattern-cam feed-shaft provided with a spiral gear 59 meshing with the spiral gear 35 carried by the main-shaft, said shaft being mounted in suitable bearings formed in the arm-bracket and held against endwise movement by the collar 61 and eccentric 62, the latter formed integral with the eccentric frame 63 pivoted by screw 64 on a disk 65 secured upon the shaft 58 by screw 66. 67 denotes a slot formed in the eccentric-frame 63 opposite the pivot screw 64 and 68 a headed screw fitted within said slot and tapped in the disk 65. 69 and 7() denote pockets formed in said eccentricframe the outer ends of which are closed by the respective screws 71 and 7 2 tapped therein, and within the pocket 69 is housed a coiled spring 73 one end of WlllCll bears against the shaft 58 while the other end abuts against the screw 71, and with n the pocket is a beveled end screw-p n 74 whose threaded head takes within the internally threaded outer end of the pocket 70 and is backed up, after the manner of a jamnut, by the screw 72. 7 6 represents a feed adjusting cap provided with a stud-screw 77 threaded, as at 78, to enter the threaded portion 79 in the shaft 58, the beveled end 80 of said stud acting through the adjustment of the cap 76 to position the eccentric 62 more or less eccentric to the shaft 58.

The means just described for adjusting the eccentric 62 is the same as that employed for adjusting the feed eccentric 8 of U. S. Patent No. 718,988 previously referred to and the same as that employed in the pres ent construction to controlthe amplitude of movement of the feed-do in which the parts illustrated are designate by the numeral 57.

lower'lever being provided with a cam-fol lower 87 tracking the cam-groove 82. 88 denotes a feed-disk loosely mounted on the stud 83 and provided with a hollow hub 88' carrying the pattern cam 81, said feed disk through the pawls as 89, springs as 90 and the toothed arm 91 loosely mounted on the stud 83 and connected by pivotscrew 92- with the eccentric connection, 93 provided with the eccentric strap 94 encircling the eccentric 62, effecting, through the rotation of the shaft 58, step-by-step rotary movementsof the pattern cam 81.

95 represents an oscillating shaft mounted in a suitable bearing formed, in the bracketarm and on said shaft is secured by screws as 95 a needle-bar positioning arm 96 provided with a registering pin 97 and springplunger 98, the inner end of the shaft 95 being provided with an integrally formed crank-arm 99 provided with a bearing sleeve 100 in which is journaled a link adjusting shaft 101. and on the inner end of the latter is suitably secured one end of a crank-arm 102 whose opposite end receives a threaded bolt 103 secured by a nut 104, and on said bolt is fulcrumed one end of a link. 105 whose opposite end .is fulcrumed on .a bolt 106 passing through suitable bearings formed in the connection 55 and 56 and secured against accidental movement by the nut 107.

Upon the shaft 101 is suitably secured a crank-arm 108 to which is pivotally connected a two part connection 109, later to be referred to, and upon the extreme outer end of the shaft 101 is suitably secured a lug 110 carrying a plate 111 indexed J on its front face and 0, 1, 2, 3 and 4 on its upper edge and provided with an arcuate slot 112 in which tracks a reduced portion 113 of the shaft 95, and upon a screw 114 threaded into the end of the shaft 101 is mounted an I indexing finger 115 provided at its opposite end with an opening 116 through which passes the reduced portion 113 of the shaft 95. On the outer end of the shaft 95 is threaded a nut 117 which acts upon a washer 118 to secure the plate 111 against movement except about the axis of the shaft 101, as is required when stitching certain of the designs, later to be explained.

The segment lever rock-shaft 86' has suitably secured upon it a bracket 119 having arms 119 and 119" indexed R. C. L., a loosely mounted segment lever 120 indexed 0, 1, 2, 3, 4, 5 and 6 and a loosely mounted segment bracket 121, indexed 0, 1, 2, 3, 4, 5 and 6, the latterv held against accidental movement in the direction of the length of the shaft 86 by the teated screw 122 tracking the groove 123 formed in the latter shaft. The upper end of the lever 120 is indexed B and provided with a springplunger 124 registering with either of the openings, R. C. L. of the arm 119"- depending upon the design or figure required, and the free end of the arm 125 of the bracket 121 is indexed D and provided with a spring-plunger 126 for registering with either of the openings R. C. L. in the arm 119" forming a part of the'bracket 119, as the character of the embroidery may require.

The two part connection 109 indexed F,

and pivotally connected at one end with the crank-arm 108, has its oppositeend adjustably' and pivotally connected with the, index-lever 120 which, at will, is an idle or active power-transmitting connection dependent upon the character of the roduct, and the connection 129, indexed at one end and at its opposite end R. C. L., is pivotally vand adjustably connected at one end with the segment bracket 121 and at its opposite end adjustably connected with the pin 97 carried by the arm 96.

It will be evident from the foregoing, in connection with the drawings, that the cam 39 imparts to the connection 56 under all conditions equal vibratory movements on both sides of an imaginary line connecting the shaft 36 with the pivot screw 56 corresponding with the mean lateral position of said connection and the crank- arms 99 and 102 are of substantially the same length as the swinging link 105, it therefore results that in any of the positions of the needlebar positioning arm 96, the rock-shaft 101, which with the crank-arm 102 constitutes the fulcrum-support, will assume such a position that the fulcrum-stud 103 may be shifted from a neutral point in the said mean position of the connection 56 to a position coaxial with the shaft 95.

As the rock-shaft 101 is movable in an arcuate path concentric with the shaft 95 inclined to and crossing the mean position of the connection 56, it will be observed that such supporting shaft 101 is adapted to assume positions spaced apart not only lengthwise of such connection but upon opposite sides of its mean position, thereby I sponding with the maximum'throw of the needle, as in the constructions represented.

by Patent No. 1.196.534 herein referred to.

It is evident that the stitchrfor'ming mechanism, besides the loop-taking device, comprises the following primary features operating in combination to produce a novel effect (1) means for .endwise reciprocating the needle consisting of the driving shaft 4, shaft-flange 6, link 7 and needlebar 8;'

(2) actuating mechanism for transmitting lateral movements to the needle consisting of an actuated cam '39, vibratory lever 56, pivotpin 106, link 105, fulcrum 103 for the lever 56 and needle-bar frame 14; (3) mech-' anism connected with the lateral-movement actuating mechanism for controlling the amplitude of the lateral movements of the needle consisting of an actuated patterncam 81, rock-shaft 86', oscillating bracket 119, segment 120, link 109, rock-shaft 101 and link 102 connected. with the fulcrum 103; (4) mechanism connected with the amlitude controlling means for controlling the field of lateral movement of the needle in the formation of a predetermined design and also for controlling the variations in theamplitude of the lateral movements, consisting of the oscillating bracket 119 actuated from the pattern-cam and connected by means ofthe segment 121, link 129, arm 96, rock-shaft and'positioning' arm 99 with the shaft 101. It will be observed that while both the amplitude and field controlling mechanisms are operated from a single element, they are interconnected to produce relative variations in their effective action. The operation to produce said variations will now be described in detail Viewing the machine as shown in Fig. 3 of the drawings throughout the following description and with both of the links 109 and 129 operative, as the bracket 119 swings step-by-step to the right, the arm 96 is moved to the right, thereby rockingthe arm 99 about an arc a horizontal component of which movement is the extent of throw of the fulcrum 103 to the left and therefore of the lever 56 to swing the needle to the left into a different field. The rocking movement of the arm 96 rocks the shaft 101 about the shaft 95 as its axis. Now assuming the segment 120 to be stationary, this movement of the shaft 101 causes a counter clockwise rocking movement thereof on its own axis, due to. the link connection 109 with the segment 120. This moves the fulcrum 103 to increase the lateral throw of the needle. However the segment 120 is at this.

time actuating the link in a direction to the left, consequently rocking the shaft 101 a greater distance in a counter clockwise direction and increasing the lateral throw of the needle to a still greater extent.

From this it is evident that the extent of lateral vibration of the needle is multiplied by the movement to the left of the working field of the needle. Conversely, the extent of vibration of the needle is lessened when said working position is moved to the right. In other words, while the links 109 and 129 receive a constant ratio of movement from the bracket 119 in any of their adjusted positions, the effect upon the shafts 95 and 101 is at a constantly varying ratio and this relative difference in the ratio of movement will vary constantly as the angular position of the arm 99 changes.

In the resulting embroidery figures produced when the links 109 and 129 are both set in operative positions it is possible to automatically maintain a substantially straight line representing the central or mean positions of vibration of the needle during a portion of the embroidery figure simultaneously with variations in the extent of lateral vibrations of the needle, and dur ing another portion of the same figure automatically change both the central line and the extent of vibration either with a constant or varying ratio according to the ad justment of the parts. The primary feature of the present mechanism is that it is possible to obtain radical changes in the extent of vibration during a substantially constant field of action for a portion of an embroidery figure and in the same figure vary both the field of operation and the extent of vibration without change in adjustment. Such an embroidery figure is illustrated for instance at C in Fig. 16 of the accompanying drawings.

There will now be explained the sequence of movement for effecting different designs and figures and varieties of such products.

To effect the centrally arranged embroidery design of Fig. 16, commercially termed coin spot, the plungers 124 and 126 and pin 97 are each set at C, the connection 109 and 129 at O and the plate 111 unsecured by the nut 117, and when so adjusted the camgroove 82 of the pattern-cam 81 acts on the cam follower 87 to, through the cam-follower lever 86, rock the shaft 86' carrying the two arm bracket 119, which latter through the pin 124 rocks the lever 120 and through the connection 109 transmits rocking movements to the shaft 101 carrying the crank-arm 102, thus causing the link 105 to be rocked on the stud 106 to vary the amplitude of the lateral movements of the needle across its zero or center line of ornamental seam formation Z to the positions required for the present design. The variety X of the present design being effected by increasing the amplitude of step-by-step movement of the pattern-cam 81 through the adjustment of the feed-adjusting cap 76, and the variety Y by decreasing the amplitude of said stepby-step movements. It being understood that in effecting the present design the connection 129 has no power transmitting action on the shaft 95.

To effect the so termed left-hand embroidery design B of Fig. 16, the plungers 124 and 126 and pin 97 are set to register with the openings L and the connection 109 and 129 at O, as in design A, which causes the connection 109 to rock the shaft 101 to carry the pivotal bolt 103, of the crank-arm 102 and link 105, downward or to a position to cause the needle to effect lateral movements to the left of the dotted line U of design A. The varieties X and Y of the present design are effected as in the like designated varieties of design A.

To effect the shield like design C, of Fig. 16, the plungers 124 and 126 and pin 97 are registered at R, the connection 129 at 3 and the connection 109 at 2, and when so adjusted the connection 109 transmits rocking movement to the shaft 101 which, as in the previously described designs, has the eflect of increasing and diminishing the amplitude of the needle vibration, and the connection 129 transmits rocking movements to the shaft 95 which has the effect of shifting the overseam stitches laterally with respect to the fabric, so it results that in the present design overseam stitches are placed at the right and across the central line Z of design A.

To efiect the scallop design D of Fig. 16,

the plunger 124: is disconnected from the arm 119 of the bracket 119, the plunger 126 registering with the opening R of the arm 119 of said bracket andvthe pin. 97 in the notch R of the connection 129 whose oposite end is secured at 3 on the segment bracket 121, the connection 109 being inoper ative owing to-the adjustment of the pin 124, and the indexing finger 115 at 2 of the index on the periphery of the plate 111, said finger being secured against accidental movement by the tightening of the nut 117, and when so adjusted the shaft 101, through the action of the connection 129, is moved about the axis of and synchronously with the rocking movement of the shaft 95, thus maintaining a given amplitude of lateral movement of the needle but shifting the field of such lateral movement to the requirements of the present design, the varieties X and Y being effected as in the like designated varieties of design A.

From the foregoing description of the se-' quence of movements ofthe needle-controlling elements for effecting the embroidery designs, and the varieties of the latter illustrated, it is to be understood that in the present improved means the pattern-cam is a controlling element which through adjustments of the connections connecting it with the needle effects many distinctly unlike designs and that by the adjustment of the means for controlling the step-by-step movements of the pattern-cam many varieties of such designs may be effected, all of which is accomplished without change in construction, and it is self evident that if a different design of pattern-cam were employed the present chain of connections between it and the needle would effect an equal number of unlike designs and varieties. The few designs and varieties herein illustrated and described have been selected as best illustrating the general application of the present means for automatically effecting predetermined design stitching.

From the foregoing it is to be understood that the position of the center line Z of the ornamental seam-formation can be automatically shifted relatively to the center of the lateral movements of the needle and the latter relatively to the line Z.

Having thus set forth the nature of the invention, what we claim herein is 1. In a sewing machine, thecombination with stitch-forming mechanism including a needle. a driving shaft, and actuating mechanism for imparting endwise reciprocating movements and lateral movements to said needle, of a pattern-cam, means for driving said pattern-cam, and operative connections between said pattern-cam ing mechanism for automatically varying the mean positions of the lateral movements of the needle and for automatically varying and said actuatthe amplitude of said lateral movements, said operative connections including means for automatically varying in inverse ratios the mean position variations relatively to the amplitude variations in the needle movements.

2. In a sewing machine, the combination with stitch-forming mechanism including a needle, a driving shaft, and actuating mechanism for imparting endwise reciprocating movements and lateral movements to said needle, of a pattern-cam, means for driving said pattern-cam, operative connections between said pattern-cam and said actuating mechanism for automatically varying the amplitude of the lateral movements of the needle, and means brought into action by said pattern-cam for automatically multiplying and lessening the effective action of said operative connections.

3. In a sewing machine, the combination with stitch-forming mechanism including an endwise reciprocating needle-bar, a needle carried by said needle-bar, a driving shaft, and means for imparting lateral movements to said needle including a needle-bar carrying frame and a frame-connection, connection independent of the means for imparting lateral movements to said needle for controlling the amplitude of lateral movement of the needle, a movable supporting element for said fulcrum controlling the mean position of said lateral movements, and automatic means for actuating said movable supporting element to thereby vary both the mean positions of said lateral movements and the amplitude thereof.

4. In a sewing machine, the combination with stitch-forming mechanism including an endwise reciprocating needle-bar, a neeof a movable fulcrum for said framedle carried by said needle-bar, a driving I parting lateral movements to said needle, I

ofa movable fulcrum for said frame connection, a movable supporting element for said fulcrum, a pattern-cam, and mechanism operated from said pattern-cam to displace said fulcrum to vary the amplitude of the lateral movements'of the needle, and mechanism also operated from said pattern-cam to displace said movable supporting element to vary the mean positions of said lateral movements.

5. In a sewing machine, the combination. with stitch-forming mechanism including an endwise reciprocating needle, a driving shaft, and means for imparting lateral movements to said needle, of a pattern-cam, means for driving said pattern-cam, a rocking bracket operatively connected with said pattern-cam, and connections intermediate said bracket and said needle for varying the amplitude of the lateral movements of the needle and for varying the mean positions of said lateral movements in inverse ratios throughout an embroidery figure.

6. In a sewing machine, the combination with stitch-forming mechanism including an endwise reciprocating needle, a driving shaft, and means for imparting lateral movements to said needle, of a pattern-cam, means for driving said pattern-cam, a rocking bracket operatively connected with said with stitch-forming mechanism including an endwise reciprocating needle, a driving shaft, and actuating mechanism for imparting lateral movements to said needle, of a pattern-cam, means for driving said pattern-cam, operative connections between said pattern-cam and said actuating mechanism for varying the mean positions of the lateral movements of the needle and forvarying the amplitude of said lateral movements, and means constantly varying in effect for automatically varying in inverse ratios the mean position variations relatively to the amplitude variations in the needle movements.

8. In a sewing machine, the combination with stitch-forming mechanism including an endwise reciprocating needle, a driving shaft, and actuating mechanism for imparting lateral movements to said needle, of a pattern-cam, means for driving said pattern-cam, operative connections between said pattern-cam and said actuating mechanism for automatically varying the mean positions of the lateral movements of the needle and for automatically varying the amplitude of said lateral movements, and means permitting adjustment of said operating connections to produce a predetermined design in any one of a pluralitv of fields of operation.

9. In a sewing machine, the combination with stitch-forming mechanism including an endwise reciprocating needle, a driving shaft, and actuating mechanism for impart ing lateral movements to said needle, of.a pattern-cam, means for driving said patterncam, operative connections between said pattern-cam andsaid actuating mechanism for automatically varying the mean positions of the lateral movements of the needle and for automatically varying the amplitude of said lateral movements, means permitting adjustactuating mechanism for automatically varying the mean positions of the lateral movements of the needle and for automatically varying the amplitude of said lateral movements, means for controlling the movement of the fabric feeding mechanlsm, and means including an adjustable eccentric for controlling the driving means for the patterncam.

11. In a sewing machine, the combination with stitch-forming mechanism including an endwise reciprocating and laterally movable needle, means for reciprocating the needle, and actuating mechanism for transmitting the lateral movements to said needle, of a bodily movable rock-shaft independent of said actuating mechanism, a controlling connection between said rock-shaft and said actuating mechanism, automatic means for moving said rock-shaft bodily to vary the mean positions of the lateral movements of the needle, and means for axially oscillating said rock-shaft to vary the amplitude of said lateral movements.

12. In a sewing machine, the combination with stitch-forming mechanism including an endwise reciprocating and laterallymovable needle, means for reciprocating the needle. and actuating mechanism for transmitting the lateral movements to said needle, of a bodily movable rock-shaft independent of said actuating mechanism, a controlling con.- nection between said rock-shaft and said actuating'mechanism, a pattern-cam, means for driving said pattern-cam, and operative connections intermediate said pattern-cam and said rock-shaft for bodily moving the latter to vary the mean positions-of the lateral movements of the needle andthereby vary the amplitude thereof.

13. In a sewing machine, the combination with stitch-forming mechanism including an endwise reciprocating and laterally movable needle, means for reciprocating the needle. and actuating mechanism for transmitting the lateral movements to said needle, of a bodily movable rock-shaft independent of said actuating mechanism, a controlling conrection between said rock-shaft and said actuating mechanism, a second rock-shaft sustaining said first mentioned rock-shaft, a pattern-cam, connections intermediate said pattern-cam and each of said rock-shafts whereby said first mentioned rock-shaft moves angularly about the axis of said second rock-shaft to vary the mean positions of the lateral movements of the needle, and means whereby said bodily movement ofthe rockshaft imparts a rocking movement thereto on its own axis to vary the amplitude of said lateral movement of the needle.

14. The combination with a reciprocating and laterally movable needle, of a vibratory and endwise movable lever connected with and adapted to impartto said needlelateral movements, means for vibrating said lever, a swinging link pivotally connected with said lever,- a fulcrum for said link, a patterncam, operative connections between said pattern-cam andsaid link formoving said fulcrum in an arcuate path crosswise of said lever, and means also operated from said pattern-cam for changing the position of said arcuate path of movement relatively to said lever.

15. Ina sewing machine, the combination with stitch-forming mechanism including an endwise reciprocating and laterally movable needle, means for reciprocating saidneedle,

' and actuating mechanism for imparting the lateral movements to said needle, of a pattern-cam, an oscillating bracket actuated from said pattern-cam, a bodily movable rock-shaft independent of said actuating mechanism, a controlling connection between said rock-shaft and said actuating mechanism, needle positioning segments adjust ably sustained by said oscillating bracket, and operative connections intermediate said segments and said rock-shaft to move the latter bodily to vary the mean positions of the lateral movements of the needle and axially to vary the amplitude of said lateral movements. v

16. In a sewing machine, the combination with stitch-forming mechanism including a reciprocating needle, actuating mechanism for transmitting lateral movements to said needle, including a vibratory lever, a movable fulcrum for said lever, a bodily movable rock-shaft sustaining said fulcrum, and a second rock-shaft sustaining said first mentioned rock-shaft, of a pattern-cam. means for intermittently driving said pattern-cam, an oscillating bracket actuated from said pattern-cam, a plurality of segmentrlevers adjustably secured to said bracket, an operative connection adjustably secured to one of said segment-levers and adapted to axially oscillate said first mentioned rockshaft to move said fulcrum and thereby vary the amplitude of. the lateral movements of the needle, and an operative connection adjustably secured to the other segment lever to bodily move said first needle, of a primary rock-shaft controlling the mean positions of said lateral movement, a secondary rock-shaft sustained by 'and movable in an arcuate path about the axis of saidprimary rock-shaft, operative connections intermediate said secondary rock-shaft and said actuating mechanism whereby axial oscillations of the secondary rock-shaft vary the amplitude of the lateral movements of the needle and whereby bodily movements thereof vary the mean positions of said'lateral movements, means for actuating said primary rock-shaft to impart said bodily movements to the secondary rockshaft, and means for locking said secondary rock-shaft against axial oscillations during said bodily movements to prevent variations in the'amplitude of said lateral movements.

18. Ina sewing machine, the combination with stitch-forming mechanism including an endwise reciprocating and laterally movable needle, and. actuating mechanism for transmitting the lateral movements to said needle, of a primary rock-shaft controlling the mean positions of said lateral movements, a secondary rock-shaft sustained by and movable in an arcuate path about the axis of said primary rock-shaft, operative connections intermediate said secondary rock-shaft and said actuating mechanism whereby axial oscillations of the secondary rock-shaft vary the amplitude of the lateral movements of the needle and whereby bodily movements thereof vary the mean positions of said lateral movements, means for actuating said primary rock-shaft to impart said bodily movements to the secondary rockshaft, an index plate carried by one of said rockshafts, and means for adjustably securing said index plate to the other rock-shaft to prevent axial oscillations of the secondary rock-shaft during its bodily movements.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

GEORGE M. EAMES.

JOHN S. FINCH.

Witnesses: 1

STANLEY N. SMITH, WM. A. SAU'rrER.

Images