US1704128A - Tension mechanism for embroidering machines - Google Patents

Description

W. HUELLER March 5, 1929.

TENSION MECHANISM FOR EMBROIDERING MACHINES Original Filed May 26, 1923 4 Sheets-Sheet 1 March 5, 1929. w. HUELLER TENSION MECHANISM FOR EMBROIDERING MACHINES Original Filed May 26, 19 23 4 Sheets -Sheet 3 W. HUELLER March 5, 1929.

TENSION MECHANISM FOR EMBROIDERING MACHINES 4 sheets-sheet 3 Original Filed May 26, 1923 March 5, 1929. w. HUELLER TENSION MECHANISM FOR EMBROIDERING MACHINES Original Filed May '26, 1925 4 Sheets-Sheet 4 Arrow/7:

Patented Mar. 5, 1929..

siren srAT-ss PATIENT:QFFICEQ,

"WALTER HUELLER, OF WEST NEWI-YORKINEW JERSEY.

mansion ra ser-realism FOB EMBRQIDERIN QHINES. I

Original application filed May '26; 1922, Serial No. time; a No. 1,645,532, dated {October 18, 1927.

V Divided and'this applieatioirfiled' Apri} 1.1,1925Q SerialN'o. 22,278.

This invention relates to needle mechanism for embroidery machines and has for its primary object to provide a mechanism adaptable to embroiderymachines of present standard construction whereby the operation of the needles may be easily and quickly changed in the embroidering of intricate designs upon dress goods, laces and other materials and is a division of my application Sorial No. 641,592 filed May 26 1928.

An embroidery machine embodying my present improvements provides in the one machine a combination of three features which have heretofore only been found 111 separate machines, nan'iely, a needle carriage haying stable or hired needles; secondly, means for automatically controlling the operation oi? needles ll'lOUllllQi'l to reciprocate upon thecarriaqe in accordance with the design being embroidered, or the different colhrs of the design, and thirdly, a hand opera ed means for controlling the stitch forminn mo 'einents of the reciprocating needles.

It is also an object of my present improve ment to provide improved mea s for applying relatiyely dill 'erent tensions to threads or cords of difierent Weight which are used 111 embroideringgg various designs.

It it also an importantfeature of my presl L I "trating the tensloning means for the threads ent invention to provide a means for control-' ling the operation of needles in sections in accord mice with the design being embroidered so in accordance with the different color in the designs and in the provision why or the individual"needles in operation so that extreme accuracy is obtained andsthe u'oduction of faulty a nd unsalable goods obviated.

It is another objectofthe' invention to provide autom atically operating perforating means associated with each needle and adapted to provide an opening through the ork with respectto which the stitchesai capplied. by the needle.

mechanism for embroidery machines; and in the in, construction and relative arrange needlemechanisni;

s which will insure the absolute stabiL' I J and other objects in iew, the invention consists infthe mproved"needle one simple and'practical embodiment of the invention and in which similar reference characters designate corresponding parts tl irougliout the severalviews: M i I Figure 'l is a side elevationrof the needle mechanism and its operating means as con structed in accordance with my present jim provem'ents; p i Figure Q'isfa top plan view of a part of the Figure 3 is a detail elevation of the pattern plate; Figure l is a similar viewof the plate holder;

Figure 5? is a fragmentary front end elea ion of the carriage; l

dle carriages arrangedin series and operated from a con'imonp'ower shaft; i

Figiilres 7 and 8are detailperspective views of partsof theneedle stabilizing machine;

Figure 8 a detail sectionalview showing the needle claniiping device;

Figures 9, 10, lland l2 illustrate examples machine; e

Figure ltl is an enlargedplan View illusor cords; i

showing a hand operated means for controlling the stitch forming operations of the needles and Fig. 18 a sectional view along the line 18-18 ofFig. 17; i i 1 Embroidery n'lachines of the type'to which the present invention is applicabley are defFigure 5 is a lzingitudinal section through the'needle carriage;

F igureG is a planviewillustrating the nee so i of diiierent kinds of work executed by the signeclto. operate upon materials over a Width of ten to fifteenyards' 'and apply the embroidery across the entire'width of the matei'iall Insuch machines the needlesare arranged in groups, the series of needles in each group bein mounted upon-a sliding cartions ofthe needles inthe carriage by hand so that only certain of the needles would operate. In cases Where it was attempted to make this change automatically, as by the use of changeable pattern plates, it was found that the necessary stability of the needles in operation could not be maintained. Such machines operate at a speed of about 120 revolutions per minute audit was found practically impossible to produce the desired automatic change in the operation of ti e needles without complicating the mechanism, in view of the relatively small space within which the needles must operate. This difiiculty 1 have succeeded in overcoming in my present inventionand have provided an arrangement in which the working of the needles may be automatically changed, without complicating such machines as heretofore constructed and also maintaining the desired stability of the needles in operation.

As shown in Figure 1 of the drawings, each needle carriage is mounted to reciprocate towards and from the work upon a suitable support 6, the carriage preferably including a base section and a removable needle supportin section 7. This latter section of the carriage is provided with spacedlongitudinally extending flanges 9 and 10, respectively,

upon which the needle holding rods 11 are mounted for axial movement. To one end of each of these rods, the needle 12 is detachably secured by a suitable clamping device 13. l The needle carriages are reciprocated by a suitable actuating means 1% arranged at t-l e rear of the carriage, and between this carriage actuating means and the needle carriages a power shaft 15 extends the entire length of the machine.

.A standard 16 is also mounted rearwardly of each needle carriage and has a forked upper end 17 through which the power shaft 15 extends. Through openings in the spaced arms of the standard, the square end 19 of a shaft 18 is loosely positioned, said shaft at spaced points being journaled in the flanges 9 and 10 of the needle carriage'and moving as a unit with said carriage when the latter is reciprocated. The shaft 18 is rotated by means of a worm gear 20 engaged upon the square portion 19 thereof between the arms of the fork 17 and having meshing en agement with the worm 21 on the power shart 15.

The shaft 18 is also provided with a threaded section 22 engaged in tnc opening in bar 23 which extends substantially the full length of the needle carriage and is provided in its upper edge with a slot or bifurcation 2 1 to receive-a pattern plate The upper side of each of theneedle carrying rods 11 has a plane or flat face 26 so as to prevent said rod turning or rotating in the supporting flanges 9 and 10. The plate is formed with spaced openings 27 arranged in. accordance with the design to be worked in the material, said openings being in line with certain of the needle bars 11 so that when the plate holder 23 is moved with respect to the carriage by the rotation of the shaft 18, said plate will engage only certain of the rods 11 to cause a stitch forming movement of the needles carried thereby, while the other rods will pass through the openings 27 in said plate. The bar 23 at each side of the plate receiving channel 2% therein is likewise provided with openings corresponding in number to the number of the rods 11. As shown in Figure 2 of the drawings, the bar 23 has been moved forwardly and the entire series of needles with the exception of one has been actuated by the plate 25, while the single needle in line with the openings 2'? in said plate has remained stationary.

In order that the needles shall move absolutely in a straight line without deviation in any direction, I have provided a stabilizing machine therefor. To this end, a member 28 is fixed upon each of the rods 11 bya suit-.

able set screw 29. At each side of the rod, an ad ustable screw or pin 3011s threaded in I L110 member 28 and is adapted for engagement against the concave face of a spring plate 31 at the opposite ends thereof, said plate being provided with an opening through which the rod 11 extends and having :1 lug 32 on its upper edge which is suitably fixed to the bar 33 which is secured upon the flange 9. In this bar the set screws 3 1 are tl'ireaded which may be adjusted into engagement with the flat faces 26 of the rods so that any one or more of said rods may be securely fixed against axial movement. in additicn to the spring plate 31, a coil spring 35 also surrounds each rod 11 and is initially placed under compression in the needle projecting movement of the rod before the screws come into contactwith the ends of said spring plate. For further stabilizing movement of the rods, 1 provide the coil springs 36 attached at one of their ends to the members28 and at their other ends to the flange 10 at a point below the plane of the rods 11, said springs exerting a downward and rearward pull upon said rods. It will be apparent that owing to the provision of the spring plates 31 in conjunction with the coil springs and 36, the needles are stabilized against any possible deviation froi'n their straight line movement so that the formation of the embroidery stitches will be very accurately performed. 3

1n manyembroidery designs, the material being worked is perforated, and the embroidery stitches are applied around the edges of the perforation. For the purpose of producing these openings through the material, I provide the perforators 3'? on the ends of the rods 38 which are mounted for axial movement in the flanges 9 and 10 independently of the needle rods 11. The rods 38 carrying the .perforators 37 are normally urged rearwardly' in the needle carriage by means of the coil ill) lll

' thread.

bearings 44-.

springs 39-. Each rod 38 forwardly of the carriage is provided with a stud or pin 40 which is engaged by the member ll threaded on the extension 42 of the shaft 18 so that when said shaft isrotated, said member ll is moved longitudinally of the shaft to thereby impart a longitudinal thrust to the rod 38 against the action of the spring 89, thus causing the perforator 3'? to be protruded through the material.

For the purpose of applying a proper ten-.

sion to the thread and core which is used in making the embroidery stitches, I have devised the mechanism shown in Figs. 13 14: and

of the drawings. In the embroidery art there is used what are knownasrunning stitches and cover stitches each of which requires a different tension. It is possible with my present improvement to use at one and the same time, a fine needle carrying a line thread and a heavy needle carrying a heavier thread. it is also'possible to vary the tension applied to the heavy thread at any time independently of the tension on the'lin'er The different threads to-be used are carried by spools Seuitably mounted and sup- )orted. Ad'acent thereto, a threaded shaft 43 extends the full length of the machine section and is mounted 'at its ends in suitable These be'a rings also support rods 45 arranged above the plane of said shaft at opposite sides thereof. At spaced intervals, plates it; are fixed upon the shaft 43 by nuts Abovethe shaft 4.3 transversely disposed plates 48 are engaged at their ends upon the rods as. stop pins 49 in said rods preventing movement of the plates 48 thereon in one direction. At one side of plates flanged rollers 50 are mounted upon the rods 45 and have convex ends 51 to which the con'--' vex protuberances 52 on the endsof a plate 53 loosely engaged on the shaft d3 are ops posed. These convex t1ons51 and 52 of the rollers and the plate 03 are yieldingly heldv in engagement wit-h'each otherby two springs 5st interposed between the plates 53 and the plates 46. he heavy cord carried by certain of the needles extends between the convex ends 51 of the rollers 50 and the convex proj-ections 52 on plate 53 the propertension being applied thereto by theacliion of the two. springs 54-. Such heavy cord is usually used for edgingdesigns in the material. The line cotton thread requires adifl'erent tension in used in the machine. 56 indicates a braking space from A to P 7 needle.

It will thus be seen. that the proper tension will be n'iaintained upon the dill erent kinds of thread and cord device of any suitable type whereby the threadedrod or shaft may be axially shift ed to apply. additional pressure against the threadsand regulate the feed thereof. Heretofore, adjustable tensioningsprings have been used in such machines, but they have not been found practical, since it was impossible to maintain exactlythe same uniform tension'on the differentthreads. By providing the adjustable screw extend'n entire length of the machine, and operating this sci-e i as above described, the tensioning devices are simultaneously adjusted sothat exa'ctly the same degree of tension is applied to all of the threads. j

From the foregoing description considered in connection with the accompanying dr ings, it isbelieved that the several media ical features of my present improvements will be fully understood. In Figures 9 to 12 of the drawings I have illustrated several examples of work ofthe kind executed by anembroidery machine equipped with my invention. Thus in Figure 9, l have shown a lace dcsign in which the embroidery stitching is applied ona foundation of silk texture with a the threads at all" times constant and e so as to obviate all possibility of se aeration of 1 i the repeated, designs and damagingof the goods. In the design illustrateih t r section of the lacebetweenthe lines and is what is called all/ l rep'eat while the portion beitween B and C 18 M18 l re Jeat. the chan e beingautomatically made inthe inaehne b the change of the pattern plates, an-tl'witltout. making any change whatever in needles. It is possible to do "this m the roll tension which isv applied to the thrcai J" shown a design in which the operations of the space from A to C", are 'ierformed by i needles while twenty needles operate in 'llhisdesign may be worked by the use of the hand operated needle controll $5 I means shown; in Figure l? of the'drawings,

1t is essential that the needle shall operate without the leastvibration. This hand changing device consists of the angular levers 60 p'ivotally mounted at 61 upon the bar 2o.-

one of said levers being provided for each The levers are norn'iallyheldwi one end positionedover the opening'inthe b: 23 in linewith the needle by means ofspring 62. Thus when'it is desired toprevent the operation of any one of theneedles in the reciprocation of c, the bar 23 the lever 60 is s the Therefore, it will be appreciated that the repeated operat ons of the needles must be absolutely exact and the tension on to i the use of the. combined spring and truer carried"by theneedles. ,In Fig. 10, I have moved against the action. of the spring 62 so as to permit the needle carrying rod to move freely through the opening in said bar. Thus any one or more of the needles may be rendered inoperative as required in accordance with the design being worked.

In Figure 11 of the drawings 1 have illu, trated a section of filet lace of line cotton which is edged in with a heavy cord and is known in the trade as the best machineanade imitation of hand made lilet lace It will be understood, of course, that a line needle is used for the cotton while a relatively heavy needle is used with the cord. Owing to the fact that by means of the new spring tension above describech the proper tension may be maintained on the her. y cord independently of that used on the liner cotton which is wound around the emery roller a very high grade product oi this kind can be produced.

In Figure 12 l have illustrated, a design stitch upon dress goods, in the e 'ecution of which a/e and Q-ai/el needles and perl orators are used in themachine. liach of the seallops bordering the edge of the material and the flower design is in 12/ l repeat, while the openings are Q/l/ l repeat ie change being 'automatlcally made in changing the pattern plates, and with the accurate application of the proper colors by reason oi the improved tensioning means.

Of course, it is apparent that my present improvements are not necessarily limited to the specific examples of work to which i have above referred to butthe autonat-ic needle control mechanism for changing the working operations of the groups of needles automatically, may be advantageously employed in the execution of various other intricate embroidery designs upon silk, cotton or other materials in the rapid quantity production of work of this kind It is also possible in the present machine to apply various ornaments to the material such beads, butt ms braid. pearls an d the like which have heretofore been attached only in machines having a fixed or stable needle and it was not possible to an automatic needle clumping attachment such as that herein described, However. inview oi the stabiliZing; means which I provide for the reciprocating needles the automaticneedle controlling and changing mea may be used for the attachment of such ornamental air-- This is a division of my application Serial No. MLSSL. iiled May 26 1923, Patent No. 1,645.532, granted October 18, 1927.

1 claim: v I

l. in an embroidery machine, a tensioning mechanism for threads of different mate ials including rollers around which one kind ott thread is engaged, springplates opposed to one end oi each roller and adapted to exert a tensioning' pressure against another thread positioned between said plates and the ends oi the rollers.

In an imdnfoidery machine, a tensioning mechanism for threads of different materials inclun' A rollers around which one kind of thread is engag one end of each roller and adapted to exert a tensioningg pressure against another thread positioned between said plates and the ends of the rollers, and means for simultaneously adjusting the tensional pressure upon all oi the threads "'l Joughout the length of the machine.

In an embroidery machine, a teusiouing mechanism tor threads of diil'erent materials including rollers around which one kind of thread engaged. spring means opposed to one end of each roller and adapted to exert the tension in pressure against thread positioned hetwecn said spring means and the ends of the rollers.

et. n an embroidery machine a tensioniug meal ism for threads of different material includ thread engaged.

, spring means opposed to one end of each roller and adapted to exert atensioning "re against another thread positioned pr ng means and the means tor simultaneously adjusting the tension upon all oil the threads throughout the length oi the machine. I p i 5 In an en'ibroidery machine, a tensioning mechanism for threads oi diiterentmaterial including rollers around which one thread is engaged, and spring means cooperating with the rollers and exerting a tensioning pressure against another thread positioned between the same and the rollers.

6. In an embroimry machine a tensioning mechanism for thr ids of diii'ercnt material including rollers around which one kind of thread is engz red, means opposed to one end of each roller and adapted to exert the tensioning pressure against another hread positioned between said spring means and the ends of the roiier, and an emery roller around which thi ads of one material are woimd and over which the other threads pass.

in testimony that my invention, and have signed my name hereto.

lVALTER HUELLER.

. spring plates opposed to another rollers around which one kind of l claim the foregoing as

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