US1283477A - Ornamental-stitch sewing-machine. - Google Patents

Description

A. H. DE VOE.

URNAMENIAL smcH s EwmGMAcHINE.

Patented Nov. 5, 1918.

5 bHEETS-SHEET l AFPLICATIN FILED FEB. 8. |917.

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A. H. D VUE.

ORNAMENT/IL STITCH SEWING MACHINE.

APPLICATION FILED FEB. 8, 1911.

Patented Nov. 5, 1918.

5 SHEETS-SHEEI 2.

MMX/M 1n: mmms verm; m., vnumurmx. wAsumamu n A. H. DE VOE.

ORNAMENTAL STITCH SEWING MACHINE.

APPLICATION FILED FEB. B. 1911.

1523,77. Patented Nov. 5, 191s.

5 SHEETS-SHEEI 3.

WITNESS INVENTO? www. MMM/g A. H. DE voE. ORNAMENTAI. STITCH SEWING MACHINE.

APPLICATION FILED FEB. 8. 1917.

Patent/ed Nov. 5, 1918.

5 SHEETS-snm a.

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oNAMENrAL-STHYCH SEWING MACHINE.

AFPLICATlON FILED FEB. 3. |917.

Patented Nov. 5, 1918.

SSHEETS-SHEE 5 WITNESS rrn erre rarita enrich.

ALBERT H. DE VCE, OF WESTFIELD, NEW JERSEY, ASSGNOR T0 THE SINGER MANUFAC- TUBING COMPANY, A CORPORATION OE NEW JERSEY.

ORNAMENTAL-STITCH SEWING-MACHINE.

To all whom it may concern: f

lle it known that I, ALBERT H. DE Von, a citizen ofA the United States, residing at lVestiield, in the county of Union and `State of New Jersey, Vhave. invented certain `new and useful Improvements in Ornamental- Stitch Sewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to improvements in ornamental stitchsewingmachines and especially vto machines having stitch-forming mechanism comprising one or more needles and, complemental loop-taking means, and thread-handling mechanism `for the ornamental thread including one or more threadlooping implements or loopers mounted for universal movement `transversely of the needle orV needles and adapted to present a thread or threads to the needle or needles in the formation of various ornamental seams differing in conguration. Y The present construction is an improvement of the machine disclosed in my copending application Serial No. 119,211, tiled September VE), 1916, in which the loopers for the ornamental threads are sustained by the presser-barV for universal movement transversely of' the needles and are actuated through connections with a pair of angularly displaced rotating cranks carried by a crossshaft geared to rotate at half the speed of the main-shaft. In my prior construction the looper-actuating mechanism includes freely fitting pin-and-socket connections permitting the presser-bar to be lifted for insertion and removal of work.

@ne of the objects of the present invention is to simplify the looper-artuating mechanism of my prior construction `and avoid the use of the pin-and-socket connections, while permitting rising andfalling moi-ements of the presser-bar. i Another object ofthe invention is to improve the timing of the. loopers, whereby they are given a substantial dwell in their advanced positions during the first part of the down-stroke ofthe needles. Y

The above and other objects, to be hereinafter referred to, are attained bythe present construction which is embodied in a sewing machine having a main-shaft disposed below the cloth-plate yand connected by 4a pitman to a needle-actuating rock-shaft journaled in the bracket-arm` of the machine.

Specification of Letters Patent.

The

Patented Nov. 5, reis.

Application filed February 8, v1911*?. Serial No. 147,295.

needle-bar carries a plurality of needles which cooperate with suitable loop-taking means, such as non-tlnead-carrying loopers, disposed below the cloth-plate and actuated in a well known manner. The machine also includes suitable feeding mechanism for advancing the work to and beyond the stitching point.

In the present construction the loopers for the ornamental threads are formed with thread-delivering tubes and are sustained for universal movement transversely of the needles by a looper-supporting frame secured to the presser-bar at a point below the machine head. The rearwardly disposed looper is supported in rear of the presser'- lfoot and projects forwardly toward stitching positionunder the arched or bifurcated shank of the latter.` The forwardly disposed looper Ais supported by a lever pivotally` sustained` in front of the stitching point. The loopers are simultaneously projected toward and retracted from the needles by a train of connections actuated through a toggle-link connection with a crank-pin carried by the needle-actuating rock-shaft. During the rst part of the downstroke of the needles no substantial movement is imparted to the looper-tubes, the tip ends'of which are at this,l timeprojected across a line joining the needles. The loopers are vibrated in unison transversely of the line of feed through mutually independent connections with a bell-crank-lever pivoted at the rear side of the bracket-arm and rocked by a linkconnection with a crank-pin on a countershaft journaled belowv the cloth-plate. The counter-shaft is geared to the main-shaft to rotate at half the speed of the latter in order that the loopers may be vibrated transversely of the line of .feed at half the frequency of reciprocation of the needle-bar. `In the accompanying drawings forming a part ofthis specification, Figure l is a front elevation ofthe machine with the cloth-plate and certain of the working parts indicated by dottedlines. Fig. 2 is a rear elevation of the machine. Fig. 3 is a plan view. Fig. l is a front end elevation. Fig. 5 is a horizontal section through the presser-bar, at a' point just below the machine head showing 'the looper mechanism for the ornamental threads in plan. Fig. G is an elevation of the looper mechanism for the ornamental threads from the side opposite that shown in Fig. 4. Fig. 7 is a perspective view of the looper-supporting frame. Figs. 8 and 9 are perspective views of the ornamental thread loopers. Figs. 10, 11 and 12 are detailed views of the presser-foot construction. Figs. 13, 14, 15 and 16 are plan views illustrating the four successive positions assumed by the looper-thread tubes relatively to the needles during a complete cycle of movement. Fig. 17 is a plan view on an enlarged scale of the seam illustrated in Figs. 1.3 to 16 inclusive.

In the preferred embodiment of the invention', as illustrated, the machine frame comprises the usual'base 1, raised cloth-plate 2, standard 3 and bracket-arm 4 terminating in the head 5. The main-shaft 6, journaled lengthwise of the base 1 and disposed below the cloth-plate 2, is formed with the usual crank 7 which is connected by the pitman 8 to the rocker-arm 9 fixed to the needle-actuating rock-shaft 10 journaled within and lengthwise of the bracketfarm 4. Secured to the needle actuating rock-shaft. 10, within the head 5, is a rocker 11 whose forward arm 11, Fig. 4, is connected through the usual pitma-n 12 to the needle-bar 13 which is journaled to reciprocate in suitable bearing sleeves 14, 14, sustained by the head 5. rlhe needle-bar terminates in a needle-clamp 15 carrying one or more needles. In the present instance the needle-clamp is socketed to receive four needles f/t, n2, W3 and at which are disposed in a row extending across the line of seam-formation.

Any suitable form of loop-taker mechanism may be provided to coperate with the needles in the production of stitches. In the present embodiment l have shown four nontlnead-carrying loopers 16 which are sustained by a looper-carrier 17 journaled to rock and slide upon a fixed shaft 18. An eccentric carried by the main-shaft 6 acts to impart loop-seizing and sidewise movements to the loopers in a well-'known manner through the eccentric-stra p 19 formed with a sleeve 2O embracing the inclined pin 21 fixed to the looper-carrier 17.

Journaled in the head 5. behind the needlebar 13 is the presser-bar 22 which is urged downwardly by the leaf-spring 23 and may be lifted by the usual hand-operated camlever 24 which acts upon the roller 25 sustained by the pin 26 projecting from the block 27 apertured to fit on the presser-bar andsecured to thelatter by a set-screw 28. To prevent turning movements of the presser-bar the block 27 is provided with al laterally projecting pin 29, Fig. 2, which is slidably received within the aperture 30r formed in the block 31 fixed to the upper end of the slide-bar 32 which is journaled in the head 5 in parallelism with the needlebar.

Fixed to the lower end of the presser-bar i 22 is the arched or bifurcated presser-foot supporting frame 33, Figs. 10, 11 and 12, whose downwardly projecting bifurcations are slotted at 34 to slidably receive the Shanks 35 of the yielding sole-pieces 36 and the connected shank portions 37, 37 of the chaining foot 3S which is disposed between the sole-pieces 36 closes the rearward side of the needle aperture 39 defined by said sole pieces. Each ofthe sole-pieces 36 is formed with a rib 40 which is fitted within an undercut slot in its respective supporting shank 35 and is pivoted to the latter at 41.. Rigidly secured' to the shank-portions 35, respectively, are vertical slide-pins 42, each of which is fitted within a suitable aperture in the presser-foot supporting frame 33 and at its upper end carries a screw 43, which serves to limit the downward movement of the pin 42 under the action of a spring 44 which bears downwardly on the shank 35. Rigidly secured to the shank-portions 37 of the chaining foot 38 are vertical slide-pins 45,

Y45, each of which `is fitted within a corresponding aperture in the frame 33 and at its upper end carries a screw 46 which serves to limit its downward movement under the laction of the surrounding spring 47. Cooperating` with the presser-foot to feedthe work is the plural-sectioned feed-dog f which is supported and actuated by any suitable mechanism such, for example, as that disclosed in my Patent No. 14,218, reissued November 28, 1916.

The loopers which present the ornamental threads to the needles are supported by a looper-frame 50 apertured to receive the presser-bar 22 rand fixed to the latter below the machine-head 5 by a set-screw 51. The frame 50 is slotted at 52 to embrace the reduced lower extremity of the slide-bar 32 which thus serves to prevent accidental turning of said frame on the presser-bar. Journaled in the horizontal bearing aperture 53 in theframe 50 is a rock-shaft 54 to one end of which is clamped t-he split socketed extremity 55, Fig. 4, of an arm 56 in whose opposite sleeved extremity 57 is journaled the upwardly extending looper-carrying shaft 5S to the lower end of which is ixedly secured the rearwardly disposed looper 59 which extends forwardly und'er the arched presserfoot frame 33 and terminates in the threadtubes 60. The looper-frame 50 is formed with a slotted lug 61 to guide the rock-arm 56. A collar 62, secured to the looper-shaft 58 above the sleeved extremity 57 of the rock arm 56, serves to support the shank of the looper' 59 snugly against the lower end of the sleeve 57. From the above description it will be seen' that looper-tubes 60 may move toward and'from the plane of the needles by rocking about the axis of the shaft 54 and may move laterally of the line of seam formation by rocking about the axis of the looper-shaft 58. Loosely mounted on the looper-shaft 58, Figs. 3 and 4, between the spaced collars 63, 63 iszasleeve 64 formed With :a lateral lug 65 apertured toV receive a `cross-.pin 66, whose oppositely projecting ends are journaled in one forked extremity of a pitman 67 whose opposite and offset forked extremity embraces Vand is pivotally connected at 68 to a rearward extension 11b ofthe double rock-arm 11. Vhen the needles are at the end of their 11p-stroke, the center 468 is slightly Vbelow a line connecting the `1, is a. pinion 70 which meshes with a spur gear 71 of double its size fixed to a countershaft 72 journaled in bearings 73,` 7 3, Fig. 2, formed in the bracket 74 screwed tothe bed 1 at 7 5. The shaft 7 2 is formed with a'crankarm 76 carrying the ballended crank-pin 77 which is embraced by the lower strapped end of a pitman 78 whose `upper strapped end embraces asimilar pin 79 fixed to the rear end of one arm 80 of a bell-cranklever fulcrumed at 81 to the rear side of the bracket-arm 4. The other arm 82 of the bell-crank-lever carries oppositely projecting ball-ended pins 83, 84, of which the pin S3 is embraced by one strapped end of the link 85 whose opposite strapped end embraces a similar pin 86 formed at one end of a crankarm 87 whose opposite split-socketed end S8 is clamped to the looper rock-shaft 58 at a point just below the lowermost collar 63. By virtue of the two-to-one speed-reduction effected by the gears 70, 71, the looper-tubes 60 are vibrated laterally at half the frequency of reciprocation of the needles. rIhe timing is such that the crank-pin 77 crosses the dead-center positions, relatively to 4the pitman 78 and shaft 72, during the first part of the down-stroke of the needles, thus causing the looper-tubes 60 to dwell at each extremity of their lateral component of `motion.

Journaled in a horizontal bearing aperture 90, Fig. 7, in the angular extension 91 of the looper supporting frame 50 is a headed pin 92, Fig. 5, to whose extremity 93 is clamped the split fulcrum-boss 94 of a supporting lever comprising a forwardly disposed angular leverarm 95 and a rearwardly extending power-arm 96. The leverarm 95 terminates in ahorizontally apertured boss 97 in which is fulcrumed the screw-pin 9S sustained by the looper-lever 99 to whose downwardly extending arm 100 is secured the forwardly disposed looper 101 `which is formed `at its extremity with a thread-tube 102. :Thepower-arm 96 of the supporting lever 95, 96, Fig. 6, is pivotally connected at 103 to one end of a short link 104 whose opposite end is pivotally connected at 105 to the forward end of a crankarm 106 whose opposite split-socketed end is clamped to the rock-shaft 54 which derives its movements from the rock-arm 56. As thus connected,`the thread- tubes 60 and 102 are caused to simultaneously approach and recede from the plane of the needles.

To cause the thread-tube 102 to partake of the lateral motion of the thread-tubes 60, the looper-lever 99 is provided at its upper end with a. ball-ended pin 107, Fig. 1, which `is connected byl a link 108 to a similar pin 109 `carriedbya slotted plate 110 adjustably sccured to the rock-arm 111 by means of a screw 112 passing through a slot in said plate. The rock-arm 111 is fixed to one end of a cross-shaft 113 journaled in a bearing bracket 114 secured to the Iupper' side of the bracket-arm 4\by a screw 115. Rigidly connected to the opposite end of the cross-shaft 113, Fig. 2, is a crank-arm 116 formed at its lower end with `guide-flanges117 defining a seat within which is adjustably secured the slotted shank of an arm 118 which forms an extension of the crank-arm 116 and carries a ballended pin 119 which is connectedby the link 120 to the ballended pin `84 previously referred to. `By means of the `toggle-link connection 67 with the needle-actuating rockshaft `10, the looper- tubes 60 and 102 are caused to simultaneously approach and recede from the plane of the needles while, at

the same time, the looper-tubes are caused to vibrate in unisonlaterally of the line of seam-formationvby means of the connection through the gears 70, 71-with the mainshaft 6.

The manner in which the loopers 59 and 101 coperate `with the needles to form an ornamental seamwill be understood from an inspection of Figs. 13 to 16, inclusive. Fig. 13 illustrates the operative relation of the vthread- tubes 60, 102, 60 and the needles a,

n2, and at, at the period of the stitchforming cycle at which the needle-points are just entering the fabric, the needles n', n2 and n3 having passed down close beside the thread- tubes 60, 102, 60, respectively. Fig. 14 illustrates theposition of the parts as the Arising needles are `leaving the fabric; the

thread-tubes having been retracted from the plane of the needles and moved slightly to the right.4 The work is now fed a stitchlength during which time the thread-tubes are moved still farther to the right and projected towardthe plane ofthe needles, passing under the then raised needle-points to the vposit-ion shown in Fig. 15 wherein the lneedle-points 'are again entering the fabric. -Inthis position the thread- tubes 60, 60, are

laying their respective threads, previously caught by the needles a', n3, about the needles n2, n4, while the thread-tube 102 lays its thread about the needle n3. Fig. 16 shows the position of the parts as the needles are subsequently leaving the fabric. During the next feeding stroke the thread-tubes` are moved toward the position shown in Fig. 13 for a repetition of the cycle of operations.

lThe seam illustrated in Fig. 17 is formed when a foursneedle machine is equipped with a rearwardly disposed double-tube looper and a forwardly disposed single-tube looper, as in the embodiment illustrated. This seam comprises a body-fabric z` supporting four spaced rows of single chain stitches b. Looped back and forth, in closed-loop or figure S formation, between each outer row of stitches and an adjacentintermediate row, are the embroidery threads c which are presented to the needles by the rearwardly disposed looper-tubes 60. The two intermediate rows of stitches are connected by an embroidery thread l which is looped back and forth in open-loop formation by the forwardly disposed looper-tube 102.

The invention, however, is not to be understood as limited to a foursneedle machine as the number of needles used is obviously immaterial. It 'is also evident that the number of looper-tubes carried by either of the loopers is immaterial and may be varied at will to produce ornamental seams differing in configuration. The present machine may therefore be put to a variety of uses including all of those suggested in my said copending application. The various structural features shown and described are also susceptible of material modifica-tion, both in the form and arrangement of the various parts, `within the scope of the invention as defined in the appended claims.

. Having thus set forth the nature of the invention, what I claim herein is 1. In an ornamental stitch sewing machine, in combination, a reciprocating needle and complemental loop taking means, a looper for the ornamental thread mounted for universal movement transversely of the needle, and actuating connections for said looper including a pivoted toggle device adapted to project the looper toward the needle, the pivots of said toggle-device being constructed and arranged to move across alinement during the first part 0f the downstroke of the needle, whereby the looper is caused to dwell substantially until the needle enters the work.

2. In an ornamental stitch sewing machine, in combination, a reciprocating needle and complemental loop-taking means, a needle-actuating rock-shaft, a crank-pin earried thereby, a looper for the ornamental thread mounted for universal movement transversely of the needle, actuating connecadapted to move `into alinement with the centers of said crank-pin and rock-shaft dur.- ing the first part of the down-stroke of the needle, whereby said looper is caused to dwell substantially until the needle enters the work. Y

3. In a sewing machine, in combination, a lower rotating main-shaft, an upper oscillating needle-shaft, stitch-forming mechanism including a reciprocating needle and complemental loop-taking means actuated by said shafts, a looper for the ornamental thread mounted for movements in mutually transverse directions, a speedreducing connection between said main-shaft and said looper whereby the latter is vibrated in one direction at half the frequency of the needle reciproeations, and connections between said oscillating needle-shaft and said looper, whereby the latter is vibrated in the other direction in unison with the needle reciprocations.

41. In a sewing machine, in combination fee'ding mechanism comprising ak feed-dog and a presser-foot having a bifurcated shank, and stitehforming mechanism comprising a reciprocating needle and aV cooperating thread-looping implement sustained in rear of said pressersfoot and projecting forwardly between the bifurcations of said presser-foot shank.

5. In an ornamental stitchV sewing ma.- chine, in combination, stitclrforming mecha-nism including a reciprocating needle and complemental loop-taking means, feeding mechanism including a feed-dog and presserlfoot having a bifurcated shank, and a looper for the ornamental thread, said looper being supported in rear of the presser-foot and projecting forw, rdly toward the needle between` the bifurcations of said presser-foot shank.

6. In a sewing machine, in combination, stitch-forming mechanism including a reciprocating needle, a presser-foot including late ally spaced shank-portions disposed mainly in rear ofthe needle, and a threadlooping element sustained in rear of the presser-foot and including a forwardly projecting thread-engaging arm disposed between the shank-portions Vof said presserfoot. i

7 A sewing machine comprising, in combination, stitch-forming mechanism including a reciprocating needle, feeding mechanism, a presserbar, a-thread-finger support fixed tol the presser-bar, a rearwardly directed arm pivoted to said support, an upwardly extending shaft journaled in said arm, a forwardly extending thread-finger carried by said shaft andpresenting an ornamental thread to said needle, means for rocking said shaft axially to move the thread-finger laterally of the line offeed,

and means for tilting said shaft to move the thread-linger lengthwise of the line of feed.

8. In a sewing machine, in combination, a reciprocating needle, a loop-taker, a needle-actuating shaft, a loop-taker actuating shaft, a thread-looping implement including a thread-engaging portion sustained for components of motions in mutually transverse directions laterally of the needle, operative connections between said implement and needle-actuating shaft for imparting` to said implement one component of its motion and operative connections between said implement and the looper-actuating shaft for imparting to said implement the other component of its motion.

9. In a sewing machine, in combination, a reciprocating needle, a loop taker, a thread-looping implement for the ornamental thread mounted for vibratory components of motion of different frequencies in transverse directions laterally of said needle, and actuating connections for imparting to said implement said components of motion, said connections including a toggle for producing a substantial dwell in the motion of said implement while in loop-presenting position adjacent the needle-path.

10. In an ornamental stitch sewing machine, in combination, a frame comprising a bracketarm terminating in a head, stitchforming mechanism incorporated in said frame and comprising a reciprocating needle and complemental loop-taking means, feeding mechanism, a, spring-pressed presser-bar journaled in said head and carrying a presser-foot at its lower extremity, a loopersupporting frame secured to said presser-bar at a point below said head, a looper for the ornamental thread mounted on said frame for universal movement laterally of the nee dle, and means for driving said looper in a figure 8 path in timed relation with the reciprocations of said needle.

l1. In an ornamental stitch sewing machine, in combination, a frame comprising a bracket-arm terminating in a head, stitch forming mechanism incorporated in said frame and comprising a reciprocating needle and complemental loop-taking means, feeding mechanism, a spring-pressed presser-bar journaled in said head and carrying a pressenfoot at its lower extremity, a loopersupporting frame secured to said presser-bar at a point below said head, loopers for the ornamental threads sustained by said frame for universal movement transversely 0f said needle, and means for actuating said loopers whereby they are caused to Apresent their respective threads to said needle in alternation.

In testimony whereof, I have signed my name to this specification.

ALBERT H. DE VOE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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