US2666231A - Roller guide means - Google Patents

Description

Jan. 19, 1954 Filed Nov. 13, 1950 W. STAHLECKER ROLLER GUIDE MEANS 2 Sheets-Sheefl .lnkenfo n" WW gmm Jan. 19, 1954 w. STAHLECKER ROLLER GUIDE MEANS 2 Sheets-Sheet 2 Filed Nov. 13, 1950 Inventor-.- WM

"2 Whiz/LEM v.

Patented Jan. 19, 1954 UNITED STA ES 91F "R ER wee "M ANS ,w helm si ahn qket fi meGexmnm aesigner to Vereinigte.Kugell l erfabrikenAktien- "gjesllsehaft,'Sehweinfurt;Gefxhaiiiy" Application November 13, 1950, Serial-No. 195,192

l' ClaimS.

1M5 znresent invention relates to a guide arm 191' 115116 upper xollerspf ;a textile :fiber drawing m ehanism. I V

@ne ofztneiobjects of myj present inventionis to prov d a guideam ;for th upper:r011ers vof dnawingime hanismzwhiqh will automatically ali n :the :axisof :the u nerzmllers with those of ,th ilowenrollers.

.-.asiditiqnal ohiect iQ my present inve tion is to provide a guide arm which will automatically nompepsatezfqrithe inevitable ina euztaciesinlthe nonstltuntion, ofithe, guideairmn herzobiectpf any present inventi n is to mm- ,e aui warm'wh ll may b e sily rei he rollers asso iated-therewith.

:lflfitflhifil herro i o qfzmy pres n inte tion is :to :p qvid a guid arm which will hav .ionly elimited play n a :to mainta n the vali n npperzrollelz -withtk e l w ro venti'on mainly v cnllsist o :a device "for guidin the npper rollerseofma textn fi erdraw n me anism {in which the upper -vr c; 11er s -are arranged ainsLa-eoxnpr' mg, i nec m n i n, a iguid arm 'navin eat least a :ifi'lfst rsectiq an 1 s co d s tion .antaneeu ubstantial y. al n astrai' ht line with an ends q qn of th vfirst ;-s 0 ocat adj? em gtovazsigleg-portion of the-second. section,

port on v, pf :vhde see d-se t on, emean Q n c g the ith the iaihev obj cts in Vi w, my pr s n intstseetlq wi h theside port on en de ram 11 theu nen iQl el th t th iu p r a. e. y l tate with respect to the gu i cle aim th .-fi em i name tw sep t si er e edir mi id arr n d i e aral el li Q h LePK S m m o n tin t of sidear siwhichare clistantirom It eeneqie i lzq @ih "fi st se tiq an $1,110 In. ele rne nt gnounted on the drawing mechand located in abuttin enga ement with e a fi-ifllfi m t t osslsrnembei and the sideQarms connected -;t ;li e'to' cooperate with the fulcrum' element: in t e a.n j erw Ora ndulum s e o automatically 1c igeps ter rg if en nees .in thelen ths of the sidarms.

21 tim l eature which a n i re es tic or ti e inyention azge set iorth in he appendedelaims. "The invenld iee t a d l-e nta h e i i b under t od f om ,the i l wine deser ption "fifilsmb tl j emswhen ifial 1m l pi M11211 th ee meem s re ifi lin M 1 99 weve lji thias toits prisp nep od of operation, together with'adqi- Big. 31 is an elexational View, partly in section, of ia u de armaceording o a present dayknow cons r tion;

1*' ig. 1a is a partialieleyational viewpf the-strum- ;tureshpwn in Fig. llrwith thelefthand rollers of Fig. 1 in a difierent position from that shown m :F

Fie- 2:, 1ap a ieW, pa l in section, o -the uq .u :e sh wn iHiEjfi-th Ri -33 is sane eVa QnaI review, ,p tl in eq n, of a guid -a c ns cted in-accordan e with y prese t inv nt on;

:Ei A is e v i w pa tl in enti n, of the structure shown in Fig. V

Fig; 5 is an end elevational gview f the struc: t e h wn in Fie a e yiewed zfr m the -rieh {hand n g h r of;

,6 "it .an-fi vational view, =part1 in se ion, of another embodiment of a guide v :arm constructed ;in; aqc 0rdanee with *my presen inv ntion;

;Fig. 7 is ,a plan iew, partly in section, of the structureshown in, Fi g. 6

Fig. 8 .i s an elevational view taken along line of Fig 6,,and looking in the direction ..of th e rmvfzs:

,-Fig.;, 9 is an elevationalzfliew, partly in section, o asti fu heriemhq im n f id m .1. structed in ,aocordanqe with ,my present invention;

fie. is .a sect ona .vi a en alon ine of Fig. 9 and looking in the directionpf the arrows; and

-=Eiehi @3 3 iewp s r c rele h wn ea f i h h nd end-.Q e--;

"Gu de gene o I t pe t which my prese ion'-relates, a1;e shown in U. 38. PatentNo. 2,245,514. finch- 3 guiqegai misillustrated inFigs. nd en re res nt jn nst l Qfi dQ-aniis- I :In; eknewn-cpnstm tion s ownni en Z,;tl 1e:upper rollers shown in the leftportion-of tact therewith. Mounted on a through rod 15 are the guide arm support members 6 which are adjustably connected to the through rod 15 by means of the bolt H which clamps together the spaced portions of the supporting member shown at the right hand end of Fig. 1. Mounted in the recess l8 in element 6 is the pin 4 to which is connected the guide arm section 2.

It will be noted that this guide arm section 2 is formed of a single piece of metal which is bent centrally thereof to form two separate side arm portions on this section of the guide arm, the free ends of these side arms being bent so as to form the bearing joint portions 3a and 319;

Section i of the guide arm shown in Figs. 1 and 2 is connected to the saddle members 59 and 20 by means of the bolts 2| and 22, respectively. Saddle member 26 has a pair of recesses which receive the end portions 311 and 31) therein so that section l of the guide arm is thereby connected to section 2 of the guide arm. Fixedly connected to saddle I9 is the hook 23 to which a weight is connected for loading the upper rollers shown at the left hand side of Fig. 1. Element 212- is a guide member for a clearer roller to be mounted above the upper roller 3.

It is evident that, in a guide arm of the type shown in Figs. 1 and 2 where guide arm section 2 is manufactured from one piece of metal, it is hardly possible to accurately construct the guide arm section 2 so that both of the bearing elements 3a and 3b are equally distant from the pivot 4 and symmetrically located with respect to a ver tical plane passing perpendicularly through the lower rollers and through the pivot point 4. Only when these requirements are fulfilled, and also in certain exceptional cases, can the guide arm section 2 be accurately aligned with guide arm section 1 and the guide arm section I be in bearing engagement with both portions 3a and 31).

Because the upper and lower rollers are not truly circular and because windings form von the rollers, the guide arm section will necessarily make linear and lateral movements which must be limited, for various reasons, by the guide arm section 2. Because of the unsymmetrical-position of the bearing joints 3a and 3b, there is a tendency for a lateral movement of the section I which is much greater than its limits permit. The result is that guide arm section I rubs against guidearm section 2 and the position of the upper rollers in parallel relation to the lower rollers does not obtain. I

- A further result is that only one of the bearing elements 3a and 3b is in engagement with guide arm section I so that a lateral turning of guide arm section 2 occurs which causes the central portion of the upper rollers Ta and 8 to be moved out of the vertical plane passing perpendicularly through the lower rollers and through the pivot 4.

My present invention overcomes these defects principally by means of a two section guide arm. The sections of the guide arm are connected together in such a way that they are free to move with respect to each other and so that the unavoidable differences in the dimensions of the sides of the guide arm section 2 are automatically compensated for.

One embodiment of my present invention for overcoming the above mentioned defects in known guide arms, is shown in Figs. 3 and where the member corresponding toguide arm section 2 of Figs. 1 and 2 is no longer made of a single piece of metal. As is shown in Fig. 4, two separate arms 2a and 2b are connected at their 4 ends to a cross member 20. The cross member 20 has reduced end portions which pass through apertures formed in the ends of the elements of 2a and 212, respectively, so that the arms 2a and 2b are freely mounted with respect to cross member 20. The connection of elements 2a, and 2b to guide arm section ia by means of the bearing joint portions 30 and 3d, respectively, is the same as that described in connection with Figs. 1 and 2.

In the form of my present invention which is illustrated in Figs. 3 to 5, the guide arm support Ea comprises a pair of longitudinal side portions 25 and 21 anda'pair of grooves 23 and is formed at the lower inner sections of these side portions. Between the side portions 26 and 21 is mounted a block 32 having a pair of projections 30 and 3| located in the grooves 28 and 29, respectively. The block 32 has a portion thereof cut away so as to permit cross member 20 to extend across the block 32. Threadedl mounted through a substantially vertical threaded opening in block member 32 is the fulcrum element 'ia against which cross member 20 bears. The position of the upper rollers may be adjusted by moving block 32 along support member 6a, and block 32 may be fixed in any desired position by turning screw do so that the projections 35 and 3| bear against the upper surfaces of grooves 23 and 29, respectively. Roving guide member 33 is shown in Fig. 3.

It will be noted that, due to the arrangement of guide arm section 2a, 2b, 20 shown in Figs. 3 to 5, the arms 2a and 2b and the cross member 20 connected thereto may move about fulcrum element 4a in the nature of a pendulum so that bearing portions 30 and 3d are always in contact with guide arm section la. If arm 2a, for example, is'moved in one direction, arm 2b necessarily moves in the opposite direction, and in this manner any differences in the dimensions of the arms 2a and 2b are automatically compensated.

The guide arm sections la and 2a, 2b, 2c are therefore constantly in alignment with each other, and all of the necessary movements of the entire guide arm are freely permitted. In order to guarantee a quick automatic parallel alignment of the axes of the upper rollers with those of the lower rollers, the lateral movements of guide arm section la with respect to guide arm section 2a, 2b, 2c are narrowly limited, as well as the lateral movements of guide arm section 2a, 2b, 2c. The lateral movement of guide arm section Ia with respect to guide arm section 2a, 2b, 2c is limited by the location of guide arm section la between elements 2a and 2b, as shown in Fig. l, and by the minimum of side play permitted between the bearing portions 30 and 3d and the recesses in the saddle element 20a shown in Fig. 4. The lateral movement of elements 211 and 2b is limited by the small clearance which is provided between these elements and the inner surface of side portions 26 and 21 of the support member is. A narrow limiting of these lateral movements permits the entire guide arm and the upper rollers connected thereto to be conveniently and eifectively controlled.

Figs. 6 to 8 show another embodiment of a construction for carrying out my present invention. In this embodiment the guide arm section is formed of two separate arms 21 and 29. However, at the left hand end of these arms, as viewed in Figs. 6 and 7, the bearing portions have been replaced by hook-shaped end portions 2d formed integrally with side arms 2) and 29. Instead of a cross member similar to 20, shown acet c-sit in Figs-2eam d-the eon e'cting'er ss mmtefze shown iii-Fig; 7' comprisesan aperture" eiteiiding' theretorodgh perpendicularly to arms 2 f and 2g and" having annular rojection" 34" located therein; V 'rhrougli the aperture in element 2e and in engagement" with projectioz'i flds 'located the fiil'-' gram member" 35 which is supported withinslotfs 36; passin through the side portions 26c and floor 'pport 6b. This fulcrum-member ably" connected by means of a thread thereonand' the nut 31 at any position along theslots 35 so as to thereby adiu'stthe ositions of the epreee re11ersene -topm ee1e toners; It you be" noted" that the hoolreshaped pertior'is 2d engage the shaft 1 ofupper roller id so that" there is providedbetween guide a'ri'n' sectib'"ameXtremelys-trong, simple and rigid con nection' wherein the shaft 1 itself forms-a pivot between the sections: Due to-this-type ofl'c'on netion it is only necessary to raise guide arm section" lc' and roller 8 in order to correct any trouble which may have occurred during the op eration of the machine; and the roller Ta will remain in the position shown in- Fig. 6. It will not' -move fromthis position as it'doeswith' the fOrmof-g'uide arm shown in Figs. 1 and-2. This movement of roller 1a is illustrated in Fig; l a and particularly harmful in a double apron" draw ingsys'tein V In order toe'lirhinate, asmuch as'possible, playbetween guide arm'sections', there is provided a pin 38'' on'which-is mounted the spring H! which pressesthe armsz-aend 2b outwardly against'the inner surfaces of the depending portions of saddle" member 261); as isclearly shown in Figs. 7 9111658:

one advantage cfthe' construction shown in Figs: 6 -to 8- is that'theg'uide arm-section- 2f,-2g' may be turned-us to the dOttedlineposition illusti'a-ted in Fig. 6, after guide armsection 27, 2o lia s -been disconnected from shaft 1; so as to give access to the rollers located beneath'guide arm section -2f, 2g.

The-construction shown in Figs. 6 to 8 permits guide arm se tion: [c to be separated'from; guide ar section 21, 2g simply by moving the shaft '1 out or thehook-shaped portions 211, so that guide arm" section 2f,- zgma then be turned up to the dottedline position shown in Fig. 6. Guide arm section 292-. 2g or its support member 6b may be constructed in any known manner so that the guide-arm section 2- ,2'9 will remain in the dotted line position shown in Fig. 6. In'contrast to this, the guide arm sections l and 2 shown in Figs. 1 and 2'- cannot be'easily separated from each other and can only be moved up to a limited degree, asis: evident from Fig. 1a.

While the spring l0 eliminates undesirable play between the guide arm sections, the force of the spring is small enough to provide only a slight frictionbetweensaddle member 2% and ends 2 d of: guide arm section 2 2g, so that guide arm sec ti'on" to maybe easily turned with respectto guide arm 'section 2'7; 2g. The construction shown in Figs. 6 to 8 therefor provides the desired'ali'gn mefitthe guide arm" section, as described above. '1 ad tion to the lateral movement of-arms an d2g, in' F-igs. sand-'7, beinglimited by side portiQhsQEa'and 21a; asdescribed above, this lateral movement is further limited to the space between the pin and the aperture extending thrbugh' cross merr'rber ze; I v} Figs. Qto l l-show alfur'th'er 'embodiment ofm'y present-invention in which the'three upper rollers 1 abutt'ihg engagement with ahnular projectiong. are air saddle waded, In this form of themve'l'lfifill'; the rearguide arm section again eludes the arms 2h'and'2isimi1arto those shown in Figs. sand 7 and-which area-Isa pressed-by spring l'lla againstthe inner surfaces of depend ingportions of the saddle member 39" which is constructed diifere'ntly rrom'saddiemember 20b"; connecting the right hand end" portions" or arms 2h" and 2;,- asviewed in- Figs; 9 and 11, is the cross-mem er 2 having the annular projection- 4'0' thereon; The fulcrum member of this" em bodiriient comprises an extension 41 of support member" 6' which has a substantial: planar-sur face-located adjacent to cross member 2a and ti" The pendulum-like movement of guide a sectiofi 2h,- Zi, Shown in Figs. 9 and 11, is lirfii 1 by" contact between the outer surface of cross member ti with the adjacent surfacevof fulcru'i'ri element} 41 I't'is evident that the guidearm section showni-n Figs; Qa-ri'd 1 1 possesses al l o the dirnerision compensating endear-enema tur es' which are-possessedby the guide arm s trons described above" in connection with-the em bodiinents of the invention shown'i'n" Fi'gst S am 6- respectively; p Saddle member 39 itself forms a part or the forward guidearm section and" is connected to" arm lo any suitable manner, e2: b a strod ture shown'in dotted lines in Fig. 9 consi's ng abifurcated element to and? a cross 1 member 51*. i he bifurcated element is-form'e'dwith an" open ing passing transversely therethrough and the elongated arm- Io extends through this opening. A threaded opening extends through arportioii of the bifurcated element which overlies the arrfr lb, and aset screw 52 is threadedly' mounted in this last mentioned opening; so as-to rigidly cone nect the bifurcated element to the'arm lb; The bifurcations of the bifurcated element 50 are mounted on opposite sides of the cross member 5! whichextends across the space between the dependingsi-de portions of saddle member 39: In order to have the bifurcated element 50- fit 39 clearances are provided on both sides between the saddle member and said element.

7 By means of this aforementioned structure the arm lb may be fixed in position with-respect to the saddle member 39 by tightening the set screw while upon looseningthe set screw the arm lb can easily be adjusted or removed. Member 39 is formed with an opening (not' shown) over the screw 52 so that the latter is easily reached.

The rod 42' for supporting the Weight which loads the upper rollers of Fig. 9 is seated ina notch provided in the upper part of'ar'm I151, there being a number of notches provided for adjustment of rod 42. The notches are not shown in the figure.

Counterclockwise rotation of eie'ment as about shaft 7 is limited by means of extensions" I2 which are formed integrally with the depending portions of saddle 3'9 and which engage step member ll 'formed on armslzh and 21'. When the load has been removed from element and when arm lb has been disconnected from member 39, this member 39 may be turned to the dotted line position shownin Fig. s te give access to the lower rollers;

It will be understood that each of the elements described above, or two or'more together; may also find a useful application in other types'of roller guide means differing from" the'types do: scribed above.

While I have illustrated and described the invention as embodied in guide means for upper rollers in a, textile drawing machine, I do not intend to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of my invention,

Without further analysis, the foregoing will so fully reveal the gist of my inventionthat others can by applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

What I claim as new and desire to secure by Letters Patent is:

1. A device for guiding the upper rollers of a textile fiber drawing mechanism in which the upper rollers are arranged in pairs, comprising, in combination, a guide arm having at least a first section and a second section arranged substantially along a straight line with an end portion of said first section located adjacent to a side portion of said second section; joint means for articulativel connecting said nd portion of said first section with said side portion of said second section; means for connecting said guide arm to the upper rollers so that the upper rollers are free to rotate with respect to said guide arm; said first section having two separate side arms spaced from and arranged in parallel relation to each other; a cross member connecting the ends of said side arms which 'are distant from said connected end of said first section; and a fulcrum element mounted on said drawing mechanism and located in abutting engagement with a central portion of said cross member, whereby said cross member and said side arms connected thereto cooperate with said fulcrum element in the manner of a pendulum so as to automatically compensate for diirerences in the lengths of said side arms.

2. A device for guiding the upper rollers of a textile fiber drawing mechanism in which the upper rollers are arranged in pairs, comprising, in combination, a guide arm having at least a first section and a second section arranged substantially along a straight line with an end portion of said first section located adjacent to a side portion of said second section; joint means for articulatively connecting said end portion of said first section with said side portion of said second section; means for connecting said guide arm to the upper rollers so that the upper rollers are free to rotate with respect to said guide arm; said first section having two separate side arms spaced from and arranged in parallel relation to each other, each of said side arms being arranged in substantially parallel relation to a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism; a cross member connecting the ends of said side arms which are distant from said connected end of said first section; and a fulcrum element mounted on said drawing mechanism and located in abutting engagement with a central portion of said cross member, whereby said cross member and said side arms connected thereto cooperate with said fulcrum element in the manner of a pendulum so as to automatically com-v pensate for differences in the lengths of said side arms.

3. A device for guiding the upper rollers of a textile fiber drawing mechanism in which the upper rollers are arranged in pairs, comprising, in combination, a guide arm having at least a first section and a second section arranged substantially along a straight line with an end portion of said first section located adjacent to a side portion of said second section; joint means for articulatively connecting said end portion of said first section with said side portion of said second section; means for connecting said guide arm, to the upper rollers so that the upper rollers are free to rotate with respect to said guide arm; said first section having two separate side arms spaced from and arranged in parallel relation to each other, each of said side arms being arranged in substantially parallel relation to a vertical plane passing perpendicularly through the lower rollers of the drawingmechanism; a cross member connecting the ends of said side arms which are distant from said connected end of said first section; a fulcrum element mounted on said drawing mechanism and located in abutting engagement with a central portion of said cross member, whereby said cross member and said side arms connected thereto cooperate with said fulcrum element in the manner of a pendulum so as to automatically compensate for diiierences in the lengths of said side arms; and means for limiting the movement of said cross member and said side arms connected thereto about said fulcrum element.

1. A device for guiding the upper rollers of a textile fiber drawing mechanism in which the upper rollers are arranged in pairs, comprising, in combination, a guide arm having at least a first section and a second section arranged substantially along a straight line with an end portion of said first section located adjacent to a side portion of said second section; joint means for articulatively connecting said end portion of said first section with said sid portion of said second section; means for connecting said guide arm to the upper rollers so that the upper rollers are free to rotate with respect to said guide arm; said first section having two separate side arms spaced from and arranged in parallel relation to each other, each of said side arms being arranged in substantially parallel relation to a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism; a cross member pivotally connected to the ends of said side arms which are distant from said connected end of said first section so that said side arms may pivot in a vertical plane with respect to said cross member; a fulcrum element mounted on said drawing mechanism and located in abutting engagement with a central portion of said cross member, whereby said cross member and said side arms connected thereto cooperate with said fulcrum element in the manner of a pendulum so as to automatically compensate for differences in the lengths of said side arms; and means for limiting the movement of said cross member and said side arms connected thereto about said fulcrum element.

5. A device for guiding the upper rollers of a textile fiber drawing mechanism in which the upper rollers are arranged in pairs, comprising, in combination, a guide arm having at least a first section and a second section arranged substantially along a straight line with an end portion of said first section located adjacent to a side portion of said second section; joint means for articulatively connecting said end portion of connected to theends of said side arms which (are distant iromsaid connected end of said-first :section so that said side arms .may vpivot in -a vertical plane with respect to said cross member; a.-fulcrum element mounted on said drawing mechanism and located in abutting engagement 'with a central portion .of said cross member, whereby said cross member and said side arms connected thereto cooperate with said fulcrum element in the imanner f a pendulum so as it automatically compensat for differences in the ilengths of saidside arms; and means for flim'it- ,ingthemovement of said cross member and said \sidearms connected thereto about said Ifulcrum element.

6. A device for guiding the upper rollers of a textile fiber drawingmechanism in which the upperrollers are arranged in pairs, comprising, in combination, a guide arm having at least a first section and a second section arranged substantially along .a straight line .with an end por- .tion o'fsaid .first section located adjacent to a side portion of said second section; joint means for articulatively connecting said .end portion of said 'first :section with said side portion of said second section; means .for connecting said guide arm to the upper rollers so that the upper rollers are 'free to rotate with respect to said guide arm; said first section having two separate side :arms spaced from and arranged in parallel relationto each other, each of said'side arms being arranged in substantially parallel relation to a "ertical plane passing perpendicularly through the lower rollers of the "drawing mechanism and said second section also being arranged in substantially parallel relation to a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism; a cross member pivotally connected to the ends of said side arms which are distant from said connec't-ed end of said first section so that said s'id'e'arms may pivot in a vertical plane with respect to said :cross member; a fulcrum element mounted -onssa id drawing mechanism and located in abutting engagement with "a central portion of said cross imember, whereby said :cro'ss member and said side arms connected thereto cooperate with said :fulcrum element in the manner of a pendulum :so :as to automatically compensate for diffierences :in the lengths ofs'aid side arms; and means for limiting the movement of said cross member and :said side arms connected thereto about :said fulcrum element, said joint means for articulatively connecting said :guide :arm :sections to eac'h other comprising apair of end por tions located respectively on .said side harms and each forming a substantially right angle bend with the remainder of said side :armsaand :a pair of :recessesiormed .in said :side portion :of said seccnd sectinn and in which said zendpcrtions .of said sidearmsare received.

. l0 7. A :device for guiding the upper rollers of a textile -@fiber drawing mechanism in which the upper rollers are arranged in pairs, comprising,

in combination, a guide arm having at least .a first section and a second section arranged substantially along a straight line with an end portion of said :first section located adjacent. to a side portion of said'second'section; joint means :for articulatively connecting said end portion of said first section with said side portion of said second section; means for connecting said guide :arm to the upper rollers so that the upper rollers are free to rotate with respect to saidguide arm; said first section having two separate side arms spaced from andarranged in parallel relation :to eachother, eachof said side arms being arranged :in substantially parallel relation to a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism and saidsecend section also being arranged in substantially ;para1lel:relation:to-a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism; a cross member pivotally connected to the ends of said side arms which 'are'distantfrom'said connected end-of said first section so that said side :arms may pivot in a vertical plane 'with respect to said cross memher; a fulcrum elementmounted on said :drawing mechanism and located in abutting engagement with a central portion of said cross member, whereby said cross member and said side arms :connected thereto cooperate with said fulcrum element in the manner of :a pendulum so :as .to automatically compensate for differences zin-the lengths .of saidside arms; means for limiting the movement of said :cross memberandsa id asid arms connected thereto about said fulcrum :element; and :ashaft-on which the upper rollers nearest to :said joint means are rotatably -mount- :ed, said joint means comprising a pair of hookshaped end :portions formed respectively at the ends of said side arms adjacent said side portion of said second. section, th said hooked-shaped .end portionsembracingsaid shaft.

:8. A device foriguiding the upper :rollers of (a textile fiber drawing mechanism in which the upper rollers are arranged :in pairs, comprising, in combination, a guide arm having at least a first section and aisecond section arrangedsubstantially along a straight .line with an endzportion of said first section located adjacent to a side portion .ofssaid second section; joint means tor-.articulatively connecting said end portion of said first section with said side portion of said secondsection; means for connecting said guide arm 'to the'upper rollers so .that'the upper rollers are .free to rotate with'respect to said ,guide arm said first section having two separate side arm's spaced "from and arranged in parallel relation to each other, each of said-side arms being arranged in substantially parallel relation to a vertical plane :passing perpendicularly through the lower :rollers of the drawing :mechanism and said second section also being arranged .in substantially :parallel relation "to a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism; a cross member :pivotally connected :to the ends of said side arms which are distant .from .said connected end of said first section so that said side arms may pivot a vertical plane with respect to said cross member; a .fulcru-m element mounted on said drawing mechanism and located .in abuttin engagement with acentral portion of said cross member, whereby "said cross member and :said

r ii

side arms connected thereto cooperate with said fulcrum element in the manner of a pendulum so as to automatically compensate for differences in the lengths of said side arms; and means for lizniting the movement of said cross member and said side arms connected thereto about said fulcrum element comprising a supporting member on which said fulcrum element is located and a pair of longitudinal side portion mounted on said supporting member and located adjacent to but slightly spaced from said side arms so as to provide a slight space for play of said side arms before they contact said side portions.

9. A device for guiding the upper rollers of a textile fiber drawing mechanism in which the upper rollers are arranged in pairs, comprising, in combination, a guide arm having at least a first section and a second section arranged substantially along a straight line with an end por tion of said first section located adjacent to a side portion of said second section; joint means for articulativeiy connecting said end portion of said first section with said side portion of said second section; means for connecting said guide arm to the upper rollers so that the upper rollers are free to rotate with respect to said guide arm; said first section having two separate side arms spaced from and arranged in parallel relation to each other, each of said side arms being arranged in substantially parallel relation to a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism and said second section also being arranged in substantially parallel relation to a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism; a cross member pivotally connected to the ends of said side arms which are distant from said connected end of said first section so that said side arms may pivot in a vertical plane with respect to said cross member; a fulcrum element mounted on said drawing mechanism and located in abutting engagement with a central portion of said cross member, whereby said cross member and said side arms connected thereto cooperate with said fulcrum element in th manner of a pendulum so as to automatically compensate for difierences in the lengths of said side arms; means for limiting the movement of said cross member and said side arms connected thereto about said fulcrum element; and a shaft on which the upper rollers nearest to said joint means are rtatably mounted, said joint means comprising a pair of hook-shaped end portions formed respectively at the ends of said side arms adjacent said side portion of said second section, the said hookshaped end portions embracing said shaft, said means for connecting said guide arm to said upper rollers comprising a hollow saddle member mountde on said second section of said guide arm and having depending portions which embrace said shaft, said hook-shaped end portions of said side arms being located within said depending portions of said saddle member.

19. A device for guiding the upper rollers of a textile fiber drawing mechanism in which the upper rollers are arranged in pairs, comprising, in combination, a guide arm having at least a first section and a second section arranged sub-' stantially along a straight line with an end portion of said first section located adjacent to a side portion of said second section; joint means for articulatively connecting said end portion of said first section with said side portion of said second section: means for connecting said guide arm to the upper rollers so that the upper rollers are free to rotate with respect to said guide arm; said first section having two separate side arms spaced from and arranged in parallel relation to each other, each of said side arms being arranged in substantially parallel relation to a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism and said second section also being arranged in substantially parallel relation to a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism; a cross member pivotally connected to the ends of said side arms which are distant from said connected end of said first section so that said side arms may pivot in a vertical plane with respect to said cross member; a fulcrum element mounted on said drawing mechanism and located in abutting engagement with a central portion of said cross member, whereby said cross member and said side arms connected thereto cooperate with said fulcrum element in the manner of a pendulum so as to automatically compensate for differences in the lengths of said side arms; means for limiting the movement of said cross member and said side arms connected thereto about said fulcrum element; and a shaft on which the upper rollers nearest to said joint means are rotatably mounted, said joint means comprising a pair of hook-shaped end portions formed respectively at the ends of said side arms adjacent said side portion of said second section, the said hookshaped end portions embracing said shaft, said means for connecting said guide arm to said upper rollers comprising a hollow saddle member mounted on said second section of said guide arm and having depending portions which embrace said shaft, said hoolr-shaped end portions of said side arms being located within said depending portions of said saddle member; and means for limiting the movement of said first section with respect to said second section comprising a spring mounted between said side arms so as to push the hook-shaped end portions thereof against said depending portions of said saddle member.

11. A device for guiding the upper rollers of a textile fiber drawing mechanism in which the upper rollers are arranged in pairs, comprising, in combination, a guide arm having at least a first section and a second section arranged substantially along a straight line with an end portion of said first section located adjacent to a side portion of said second section; joint means for articulatively connecting said end portion of said first section with said side portion of said second section; means for connecting said guide arm to the upper rollers so that the upper rollers are free to rotate with respect to said guide arm; said first section having two separate side arms spaced from and arranged in parallel relation to each other, each of saidL side arms being arranged in substantially parallel relation to a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism and said second section also being arranged in substantially parallel relation to a Vertical plane passing perpendicularly through the lower rollers of the drawing mechanism; a cross member pivotally connected to the ends of said side arms which are distant from said connected end of said first section so that said side arms may pivot in a vertical plane with respect to said cross member; a fulcrum element mounted on said drawing mechanism and sne'mber and said side iarms connected thereto cooperate awith said fulcrum .elementfin the :manneriof a pendulum so as to automatically compensate if or differencesi-n the lengths eof said side arms; and ,-.a shaft .on which dzhe upper rollers neares't to :said joint means are 'rotatablyrmount- "ed, said \joint means comprising a :pair of hookshaped end :portions sformed respectively at :the ends of said side arms adjacent said side por tion of said second section, the :said hook-shaped end portions embracing said shaft, said :means forcon-necting said guide arm to said upper rollers comprising a hollow saddle .member mounted onsaidsecondsection ofsaidiguidearmand having depending portions which embracesaidishaft, --said hook-shaped end portions of said side arms being located within said depending .portions of said saddle member; and means for limiting the movement of said first section :with respect to said second section comprising a springimounted loetween said side arms so as to push :the hookshapedend portions thereof against saidv'dependeing portions of said saddle member, said cross member fleeing formed with an aperture extend- 'ing therethrough in a direction which is substantially perpendicular to said side arms, said fulcrum element comprising a fixedly mounted :pin extending through said aperture, and a projection -mounted on said cross member andbear- *i-ngagainstthe outer "surface of-said pin and said being of asubstantia'lly smaller cross-section than said aperture so that a space is provided between the Outer surface of said pin and :the

surface of said-aperture, whereby the movement of said cross member and said side arms connectedthereto about said pin is limited to said space between said pin and said aperture.

'12. A device "for guiding the upper :rollers-o'fa textile fiber drawing mechanism in which the upper :rollers are arranged in pairs, comprising, in "combination, a guide arm having at least a first section and a second section arranged substantially along a straight line with'an-end portion of said first section located adjacent-to a side por- "tionof saidsecond section; joint means for articulatively connecting said end portion of said first section with said side portion-of said second section; means for connecting said guide arm to the upper rollers-so thatthe upper rollers are free to'rotate with respect to said-guide arm; said first section having two separate side arms spaced from and arranged in parallel relation to each other, each :of said side arms being arranged in relation to a vertical "plane passing perpendicularly through the lower rollers of the drawing mechanism; a cross member pivotally connected to the ends of said side arms which are distant from said connected end of said first section so that said-side arms may pivot in a vertical plane with-respect to saidcross member; a fulcrum-element mounted on said drawing mechanism and located in abutting engagement with a central portion of said cross member, whereby said cross member and said side arms connected thereto cooperate with said fulcrum element in the mannor of a pendulum so as to automatically cornpensate for diiferences the lengths of said side arms; and #a shaft on which the upper rollers nearest to said ioint means are '-rotatably mount- -ed, said joint :means comprising :a pair of hookshaped. end portions form-ed respectiuely zat ithe ends of :said side :arms adjacent said side portion of said second section,;thesaidrhookeshaped end portions embracing said shaft, said means :for connecting said guide arm :to said :upper mailers comprising ;a hollow saddle member mounted :on said section section of said guide :arm :and having depending .gportions which embrace rsaicl shaft, said hook-shaped end :portions -of said :side :anms being located within said depending :portions said saddle member; means for limiting sthe movement of said first section with respect do said second section comprising :asspring mounted betweentsaid side arms :so as to :pushthookshaped end portions thereof against said depending portions of said saddle member, said cross 'memberibeing formed with an raperture ex tending therethrough in .a direction which'fis substantially perpendicular tosaidsidearmsesaiid fulcrum element :comprising a fixedly mounted pin extending through said aperture, :andramrojection mounted 101']. said cross member and hearing against the-outer surface of said pin and said :p'in fbeing of :a substantiallyrsmaller cross-section than-said aperture so that aspace is providedbetween the outer surface .of said pin and the :sun- :face'oi said aperture, whereby the :mo-vemen't or said cross member-and said side :arms :connected thereto about :said :pin is limited to saidspace :be-

tween said pin and said :aper-ture; :a slot formed in said drawing mechanism .iniwhich said ipill 'is received; and means for a'djustably fixingsa'id pin at any desired location in said slot "whereby the position of said upper rollers may be regulated.

13. A :device for guiding the upper rollers-01 a textile fibendrawing'mec'hanism in which theupper rollers are arranged in pairs, comprising. in combination, a guide arm :naving at least 'a filst section :and a second section arranged "substan tially along a straight dine with an end portion of said first section "located adjacent to a side portion :of said second section; do'int means for articulatively=connecting said end portion :of said first section 'with said side portion :of said second section; 'means ior connecting said guide arm 'to the upper rollers so that the upper rollers are free to rotate with respect to said guide arm; first section having two separate side arms spaced from and arranged in parallel relation to each other, each of said side earms being arrangcdin substantially parallel relation to a vertica-l plane passing perpendicularly through the lower rollers "of the "drawing mechanism and said second =section also being 1 arranged in substantially parallel relation a vertical plane passing perpendicularly through the lower irollers pf the drawing mechanism; {a cross member pivotally connected to the'ends of said side arms which are distant from said connected end of said first --section so that said side arms may pivo't in a vertical plane with respect to s aid press member; 'a fulcrum element mounted-on said drawing mechanism and located in abutting engagement with a central 7 portion of said cross member, whereby said cross member and said side arms connected thereto cooperate with said idlcruzmlement in the manner of a pendulum so as to automaticallycon'lpensate for differences in the lengths of said side arms; and a shat-t on which tho-upper rollers nearest to said joint means are rotatably mounted, said joint ,means comprising-a pair of hook-shaped end portions formed respectively the :ends of said side arms adiacen-t said side portion "of said second section, the said hook-shaped end "portions embracing said shaft, said means for connecting said guide arm to said upper rollers comprising a hollow saddle member mounted on said second section of said guide arm and having depending portions which embrace said shaft, said hook-shaped end portions of said side arms being located within said depending portions of said saddle member; and means for limiting the movement of said first section with respect to said second section comprising a spring mounted between said side arms so as to push the hook-shaped end portions thereof against said depending portions of said saddle member, said cross member bein formed with an aperture extending therethrough in a direction which is substantially perpendicular to said side arms, said fulcrum element comprising a fixedly mounted pin extending through said aperture, and a projection mounted on said cross member and bearing against the outer surface of said pin and said pin being of a substantially smaller cross-section than said aperture so that a space is provided between the outer surface of said pin and the surface of said aperture, whereby the movement of said cross member and said side arms connected thereto about pin is limited to said space between said pin and said aperture and whereby said side arms are free to rotate with said cross member about the axis of said pin so that, when said hook-shaped end portions of said side arms are disconnected from said upper roller shaft, said side arms may be turned up to give access to rollers located beneath said side arms.

14. A device for guiding the upper rollers of a textile fiber drawing mechanism in which the upper rollers are arranged in pairs, comprising, in combination, a guide arm having at least a first section and a second section arranged substantially along a straight line with an end portion of said first section located adjacent to a side portion of said second section; joint means for articulatively connecting said end portion of said first section with said side portion of said second section; means for connecting said guide arm to the upper rollers so that the upper rollers are free to rotate with respect to said guide arm; said first section having two separate side arms spaced from and arranged in parallel relation to each other, each of said side armsbeing arranged in substantially parallel relation to a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism and said second section also being arranged in substantially parallel relation to a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism; a cross member pivotally connected to the ends of said side arms which are distant from said connected end of said first section so that said side arms may pivot in a vertical plane with respect to said cross member; a fulcrum element mounted on said drawing mechanism and located in abutting engagement with a central portion of said cross member, whereby said cross member and said side arms connected thereto cooperate with said fulcrum element in the manner of a pendulum so as to automatically compensate for differences in the lengths of said side arms; and a shaft on which the upper rollers nearest to said joint means are rotatably mounted, said joint means comprising a pair of hook-shaped end portions formed respectively at the ends ofsaid side arms adjacent said side portion of said second section, the said hook-shaped end portions embracing said shaft, said means for connecting said guide arm to said upper rollers comprising a hollow saddle member mounted on said second section of said guide arm and having depending portions which embrace said shaft, said hookshaped end portions of said side arms being located within said depending portions of said saddle member; and means for limiting the movement of said first section with respect to said second section comprising a spring mounted between said side arms so as to push the hookshaped end portions thereof against said depending portions of said saddle member, said cross member having an annular projection located centrally thereof, said fulcrum element having a substantially planar surface against which said annular projection bears and which is slightly spaced from the cross member, so that the movement of said cross member and said side arms connected thereto about said fulcrum element is limited by the contact of a portion of said cross member with said surface of said fulcrum element.

15. A device for guiding the upper rollers of a textile fiber drawing mechanism in which the upper rollers are arranged in pairs, comprising, in combination, a guide arm having at least a first section and a second section arranged substantially along a straight line with an end portion of said first section located adjacent to a side portion of said second section; joint means for articulatively connecting said end portion of said first section with said side portion of said second section; means for connecting said guide arm to the upper rollers so that the upper rollers are free to rotate with respect to said guide said first section having two separate side arms spaced from and arranged in parallel relation to each other, each of said side arms being arranged in substantially parallel relation to a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism and said second section also being arranged in substantially parallel relation to a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism; a cross member pivotally connected to the ends of said side arms which are distant from said connected end of said first section so that said side arms may pivot in a vertical plane with respect to said cross member; a fulcrum element mounted on said drawing mechanism and located in abutting engagement with a central portion of said cross member, whereby said cross member and said side arms connected thereto cooperate with said fulcrum element in the manner of a pendulum so as to automatically compensate for differences in the lengths of said side arms; and a shaft on which the upper rollers nearest to said joint means are rotatably mounted, said joint means comprising a pair of hook-shaped end portions formed respectively at the ends of said side arms adjacent said side portion of said second section, the said hook-shaped end portions embracing said shaft, said means for connecting said guide arm to said upper rollers comprising a hollow saddle member mounted on said second section of said guide arm and having depending portions which embrace said shaft, said hookshaped end portions of said side arms being located within said depending portions of said saddle member, said side arms each having a projection on the surface thereof and said saddle member having a pair of projections in engagement with said projections of said side arms so as to limit the rotation of said saddle mem- 17 her about said shaft; and means for limiting the movement of said first section with respect to said second section comprising a'spring mounted between said side arms so as to push the'hookshaped end portions thereof against said depending portions of said saddle member, said cross member having an annular projection located centrally thereof, said fulcrum element having a substantially planar surface against which said annular projection bears and which isslightly spaced from the cross member, so that the movement of said cross'member and said side arms connected thereto about said fulcrum element is limited by the contact of a portion of said cross member with said surface of said fulcrum element.

16. A device for guiding the upper rollers of a textile fiber drawing mechanism in which the upper rollers are arranged in pairs, comprising,

in combination, a guide arm having at least a I first section and a second section arranged substantially along a straight line with an end portion of said first section located adjacent to a side portion of said second section; joint means for articulatively connecting said end portion of said first section with said side portion of said second section; means for connecting said guide arm to the upper rollers so that the upper rollers are free to rotate with respect to said guide arm; said first section having two separate side arms spaced from and arranged in parallel relation to each other; a cross member connecting the ends of said side arms which are distant from said connected end of said first section; and a fulcrum element comprising a pin which is supported in a substantially vertical position and which is mounted on said drawing mechanism and located in abutting engagement with a central portion of said cross member, whereby said cross member and said side arms connected thereto cooperate with said fulcrum element in the manner of a pendulum so as to automatically compensate for differences in the lengths of said side arms.

17. A device for guiding the upper rollers of a textile fiber drawing mechanism in which tne upper rollers are arranged in pairs, comprising, in combination, a guide arm having at least a first section and a second section arranged substantially along a straight line with an end por- 18 tion of said first section located adjacent to a side portion of said second section; joint means for articulatively connecting said end portion of said first section with said side portion of said second section; means for connecting said guide arm to the upper rollers so that the upper rollers are free to rotate with respect to said guide arm; said first section having two separate side arms spaced from and arranged in parallel relation to each other, each of said side arms being arranged in substantially parallel relation to a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism and said second section also being arranged in substantially parallel relation to a vertical plane passing perpendicularly through the lower rollers of the drawing mechanism; a cross member pivotally connected to the ends of said side arms which are distant from said connected" end of said first section so that said side arms may pivot in a vertical plane with respect to said cross member; a fulcrum element comprising a pin which is supported in a substantially vertical position and which is mounted on said drawing mechanism and located in abutting engagement with a central portion of said cross member, whereby said cross member and said side arms connected thereto cooperate with said fulcrum element in the manner of a pendulum so as to automatically compensate for differences in the lengths of said side arms; and means for limiting the movement of said cross member and said side arms connected thereto about said i'ulcrum element comprising a supporting member on which said fulcrum element is located and a pair of longitudinal side portions mounted on said supporting member and located adjacent to but slightly spaced from said side arms so as to provide a slight space for play of said side arms before they contact said side portions.

WILHELM STAHLECKER.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,108,930 Stroink Feb. 22, 1938 2,246,474 Stahlecker June 17, 1941 2,326,979 Stahlecker Aug. 17, 1943

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