US2555045A - Yarn tensioning device and break detector for spoolers - Google Patents

Description

y 29, 1951 H. G. LIND 2,555,045

YARN TENSIONING DEVICE AND BREAK DETECTOR FOR SPOOLERS 1 Filed Nov 4. 1947 .IINVIZNTOR. Harry G. Lina *CJL m mw ATTORNEYS Patented May 29, 1951 YARN TENSIONING DEVICE AND BREAK DETECTOR FOR SPOOLERS Harry G. Lind, Rockford, Ill., assignor to Barber- Colman Company, Rockford, 111., a corporation of Illinois Application November 4, 1947, Serial No'. 783,898

.13 Claims. 1

The invention pertains to yarn winding ma chines or spoolers of the type disclosed in C01- man Patent No. 1,267,977, and has particular reference to a device for tensioning the strand running from the bobbin which is being unwound to the cheese or yarn mass which is being formed.

When unwinding yarn from so-called warp wound bobbins, a considerable amount of friction develops in the unwinding of the yarn from the bobbin so that the running strand is placed under sufficient tension to insure the formation of a firm and hard cheese. But when using filling wound. bobbins as the source of supply of the yarn, the yarn unwinds freely with the result that the tension imposed upon the running strand is insufficient to form a satisfactory. yarn mass or cheese.

With the foregoing in View, the primary object of the present invention is to provide in a spooler of the character indicated a tensioning device operative to subject the running strand. to sufiicient tension to permit the use of filling wound bobbins While avoiding the formation of loose or soft yarn masses or cheeses.

Spoolers of the type referred to employ between each bobbin and yarn mass or cheese a device for detecting the exhaustion or breakage of the running strand. This means comprises, as disclosed in said Colman patent, a grid and an associated detector responsive to the exhaustion or breakage 'of the thread and operative in such event to shift or throw out the cheese from its normal running position to an inactive position. Cheeses thus shifted into inactive positions are operated upon by a winder tendin mechanism whose function it is to seize the loose ends of the threads leading to the cheeses and to unite them by meansof a tying mechanism to form a new running strand, The Winder tending mechanism further operates to position the detector with respect to the grid so as to receive the new strand and to restore the cheese to active or running position. A more specific object of the present invention is to provide in association with the grid a thread tensioning device so correlated with the detector as to be shifted together with the detector into open relation to the grid by the winder tending mechanism and subsequently restored by such mechanism to active position.

The objects of the invention thus generally set forth, together with other and ancillary advantages, are attained by the construction and arrangement shown by way of illustration in the accompanying drawings, in which:

Figure 1 is a fragmentary perspective view of one of the winding units of a spooler of the type shown in said Colman patent and incorporating my improved yarn detecting and tensioning device, a portion of the winder tending mecha nism also being shown.

Fig. 2 is a fragmentary view partially in section showing the detecting and tensioning device in plan.

Fig. 3 is a fragmentary vertical sectional view illustrating the mounting of the detector and tensioning element.

Referring now to Fig. 1 of the drawings, I have shown one of a series of winding units which are arranged side-by-side about the spooler frame, each unit having a support such as a device generally designated l2 and thence past a stationary grid I3 with which is operatively associated a detector in the form of a finger l4 bearing lightly upon the running strand as the same passes over the grid l3 and operative upon the breakage or exhaustion of the strand to interrupt the winding operation. As in the case of said Colman patent, the cheese support H is in the form of an arm pivoted on a bracket l5 and having integral therewith an arm IE to which is attached a U-shaped bail H. The detector finger M is fast upon a vertical rockshaft I8 urged by a torsion spring IS in a direction to move the finger I4 against the running strand. The upper end of the shaft carries an arm '20 positioned for engagement with the bail l1 and operative when the shaft I 8 is rocked by its spring upon breakage or exhaustion of the thread, to swing the bail into the path of a constantly oscillating hook 2|. As a result, when the finger l4 detects the breakage or exhaustion of the running strand, the bail is swung into the path of the hook 2i and is drawn downwardly thereby so as to cause the cheese supporting arm II to be shifted into its inactive position. In the winding position, the cheese rests upon a revolving drum 22 so as to be driven thereby.

.One of the functions of the winder tending mechanism, as above indicated, is to shift the detector finger M from the position occupied thereby after breakage or exhaustion of the thread, first into open or spaced relation to the grid [3 (see Fig. 2) so as to permit entry of the new strand formed by the reunited threads and then reversely into active position in engagement with the strand. For this purpose, the vertical rockshaft I8 is actuated in the travel of the winder tending mechanism by cam means comprising, s hnra a M 3 a isie y th winderltending mechanism and enacting with the arfn ZKL which serves to shift the bail I! as above described, and an additional arm 24 fix e d on the upper end of the rockshaft. This cammeans is substantially identicakwith. thatdisclosed in said Colman patent and it thereto a deemed unnecessary to illustrate and describe the same in detail. In generali thebar 23: is pro;-

vided with a cam surface 25 coacting with the arm 24, and a cam surface 26 coacting with the arm 20, the arrangement b ing;i h;th a1th 24 on the shaft I8 is first engaged by the cam surface 25 so as to i part a partial rotational or rocking movement 0 the shaft and the cam surface ZS cooperating withlthearm:Zihcempletes the rockingnioizement Cam surfaces and 28 control we. movement ofthewshaftin a; reverse direction aslthetwinder tendinglmechanism continues. in its. travel.

In carrying. out my invention, I- providea. yarn tensioning' deviceespring pressed 2111130, a predetermined strand deflecting position relativeltothe grid: I3 during the. windinaQDeration andalso ngedrformovementin the travel'ofthel-winder I tending mechanism first into open relationtqthe grid landlthen into, activecpositien for the-windin operation. In ,thepresent embodiment Qi;my -,lnvention I provide an additional fingerEmperatigely. associated,v with the shafiir l8 -;-and -=l he ,detectornnger- 14, in.- a mann rsuq hat-both fin rs; are utilized, tapetferm. the: tensien ee fun ti0n.

Ref rrin now? -F s; hand-:3; ther c shai I 8i= s= s uppe aend. iourn .d n a u ack n39, lts lower end is formed w .stud,- 3I re ived n oc e i -l t .theupner eat, ec ndtmq naf lfitt h lat e eing axiallylalined withh hamh sbafi fleri u ee et qsata pee ctiin. rack t-1 5; and em ts-la r- Q a sk t rm dete terfieeet t r i -l teuresh n i lgrk fitfiaeel -fihlever 611 of Y .g ee ienfist e h y gst 1!- h ig S at q. n l, P9 5 e vest igutm extent amer went it el fin nrwq the "spring; as and to hold the tensio i'ng. finger A; ii torsion fl 3v so, aslto, be

I the light sprin l9;

4 with the running strand between the upper and intermediate fingers 42 and 43, and the tensioning finger 29 bears upon the strand between the intermediate and lower grid fingers 63 and 44. The tension of the spring 19 is such as to cause the detector finger [4 to bear upon the running reiteratin l It will he observed that the detectqr finger 14 must be capable of movement by its spring I9 U in the event of breakage or exhaustion of the thread independently of the tensioning finger 29. A tgthesame time rocking movements imparted ,toh. the shaft [8 by the cam bar 23 coacting with thearmsjg ztznu s t be transmitted to the tengfinger .Eqr this purpose, a one-way connection is progided between the blocks 36 and 31 (Fig. 3) This connection is provided in the present instance-lbytmeans of a pin 45 rigid with the lower block 3! and projecting therefrom into abutting relation to a shoulder 46 on the upper block 36. It Will be seen that by this construction the fingen-Hbisiree to. moverearwardly under the-infiuenceof its spring l9- (Fig. 1) upon breakage or-exhaustion of: the. running strand while the tensioning finger 29 remains.- stationary. On the other hand; reverse. rotational movementof. theshaft. I78. by the camlmeans on the winder tending mechanism is transmitted through the. one-way connectionr lfig. 461 between the blockstfi. and-13:1: Asa result, bothoL-the fingers. I9 and 29am rendered operative-by-the cam means forshiftingthe, finger into Q961 relation to. thegrid and: then-restoring them to their active-positions.

It will also be. seen that by. the construction and arrangement; set 'forththe spring 3l8rser-ves to impart a tensioningqfunctionato, the deteetor finger.- while enabling, the latter? to perform, its detecting function solely under the-influeneeaof hushe sprin .81 acts t rou e: on warnnect on" 4 7 held the;- fin er n. a, os t on e a iv et hee rid determ d hest p 3 0;: ich'no itien et an 'z d fl tedt n am un erresmndin q,-:. a r du er by "the fin er llz 1* laim a my? inventi n:

1.- In -,-a winder having supports 1 for; a bobbin nde ew .m ansa or tectm n rnailson aka e o a nin t' trande ten m rom he bo bin-t ther h e i. me snnsn a de ermi d r f en i e on; h tm sa dteqtina nd eas qnia me ns: nc din vm va e m nts. and sprin s fe m9Y'il '4- h? z eme e e deatl lmdrcam 0pt at me ns f z ftingt eie r w le em nt vor breakage oj a runningstrandextendingjrom h ehbmi t heh es means e v mrpsm p edate m neochde een r nsient the runnin tr nd; a detect n nd. ensien n e nlll it aen 9 ar rildl ndl ana r n pv hl t mentsm vnted n a ommgn tension..- win ng, .,m9yem ntto wa td d mm;. hel 1t prm or y n h he morable. elements nde endent in one iree onl andr ea sl or; hiitina ai mwahle l ments onipi ltl ag in t he ctiq .11 lnder ha inav u pqrtsl or abehbi and a ese means; forI etettma heexhws- 91 .01.". breakage of. a.r nn n f rand xtensi romithgbe bin' will? hee e for; m etns ,a. I predeterwged; d gree. f a ens on, n, he

running strand, said means comprising a grid having a plurality of stationary fingers, a plurality of movable fingers normally engageable with the running strand to hold it against the grid and spring means for moving the movable fingers independently to urge them against the running strand, and means having a common actuator for shifting said movable fingers against the action of said spring means.

4. In a winder having supports for a bobbin and a cheese, means for detecting the exhaustion or breakage of a running strand extending from the bobbin to the cheese, means for imposing a predetermined degree of tension on the running strand, said means comprising a plurality of stationary strand engaging elements, a pair of movable thread engaging elements, means providing a one-way connection between said movable elements, spring means operative upon the respective movable elements to urge them into engagement with the strand, and means operative through said one-way connection to shift said movable elements conjointly against the action of said spring means.

5. In a winder having supports for a bobbin and a cheese, means for detecting the exhaustion or breakage of a running strand extending from the bobbin to the cheese, means for imposing a predetermined degree of tension on the running strand, said means comprising a plurality of stationary thread engaging elements, a pair of movable thread engaging elements, a rockshaft supporting each of said elements, means providing a one-Way connection between said rockshafts, a spring for each of said shafts tending to shift the movable elements independently, and means for shifting one of said shafts reversely against the action of its spring means, the last mentioned means being operative throughsaid one-way connection to shift the other movable element against the action of its spring means.

6. In a winder having supports for a bobbin and a cheese, means for detecting the exhaustion or breakage of a running strand extending from the bobbin to the cheese comprising a rockshaft, a movable strand engaging detecting element on said shaft, a spring yieldably holding said detecting element against the strand, and means for shifting said element reversely against the action of said spring; and means for imposing a predetermined degree of tension on the running strand including a movable tensioning element, a spring acting upon said tensioning element tending to urge it against said strand, and means providing a connection between said tensioning element and said rockshaft operative to shift the element reversely conjointly with the detector element.

7. In a winder having supports for a bobbin and a cheese, means for detecting the exhaustion or breakage of a running strand extending from the bobbin to the cheese comprising a rockshaft, a movable strand engaging detectin element on said shaft, a spring yieldably holding said detecting element against the strand, and means for shifting said element reversely against the action of said spring; and means for imposing a predetermined degree of tension on the runnin strand including a movable tensioning element, a second rockshaft carrying said tensionin element, a spring for said second shaft acting to move the tensioning element against said strand, and a one-way connection between said shafts operative in the reverse rotation of the first shaft to actuate the second shaft.

8. In a winder having supports for a bobbin and a cheese, means for detecting the exhaustion or breakage of a running strand extending from the bobbin to the cheese comprising a rockshaft, a movable strand engaging detecting element on said shaft, a stationary grid, a spring yieldably urging said detecting element relative to the grid and against the strand, and means for shifting said element reversely against the action of said spring; and means for imposing a predetermined degree of tension on the running strand including a movable tensioning element, a tensioning spring acting upon said tensioning element tending to urge it against said strand, stop means for limiting the movement of the tensioning element by its spring, and means providing a one-way connection between said tensioning element and said rockshaft operative to shift the element reversely coniointly with the detector element, said one-way connection being operative to transmit the force of the tensioning spring to said detecting element to hold it in a predetermined strand deflecting position relative to the grid.

9. In a winder having supports for a bobbin and a cheese, means for detecting the exhaustion or breakage of a running strand extending from the bobbin to the cheese comprising a rockshaft, a movable strand engaging detecting element on said shaft, a stationary strand engaging element, a spring acting on said detecting element to hold it lightly against the strand, a second rockshaft having a one-way connection with the first rockshaft, a tensioning spring acting on said second rockshaft through said connection to urge said detector element against strand and stop means for limiting the movement of the detector by said tensioning spring.

10. In a winder having supports for a bobbin and a cheese, means for imposing a predetermined degree of tension on a running strand extending from the bobbin to the cheese comprising a stationary grid, having a pair of straight parallel strand engaging elements, a movable tensioning finger coacting with said grid and yieldably urged in a direction to bear upon the running strand, stop means for limiting the extent of movement of the movable finger to maintain it in parallel relation to the strand engaging elements of the grid, and cam means for shifting said movable element in a direction away from said grid.

11. For a winder having means for detecting the exhaustion or breakage of a running strand including a grid, a detector finger and a rockshaft supporting thefinger for movement relative to the grid, and cam operated means for rocking said shaft reversely to move said finger into open relation to the grid; a strand tensioning device comprising a tensioning finger and a supporting member therefor, means for rotatably supporting said member in axial alinement with said shaft, a spring acting on said member to urge the tensioning finger toward said grid, and means providing a one-way connection between said member and said rockshaft effective' only in the reverse movement of the rockshaft by said cam means.

12. For a winder having supports for a bobbin and a cheese and a grid for engagement by a running strand extending from the bobbin to the cheese; a detector finger, means for swingably supporting the finger for movement relative to said grid, a spring yieldably urging said finger lightly against said strand to hold it against said 7 rid a em e refqetahle te a ive z nger ha n a; ne-way see-metion h r w h) a tenfsiomne s r n ey said membe zact ng n. ai fin e hr h e d:- qonpe t qn d 1 1! eans oe em ine mo em m' of; h fin er by said n.- s o n i pn n 32-.v n ind nhe ng up ers o a bo bin and; a cheese, a; statipngrygrid haying a plurality of elementg fprengagement; by a, strand; ext nd n rom he b bb nto e h es 2 m able strand: engggipg element, a spring tending to move said movable element through the grid ne n; haus n- Q breakag o the r,v a seqollsi: mo able elemen meunt d for movement owerdhe mm. .1 s rin el ve y av r han aid-fies m nt one pn n gam ac p a second element, stopmeans for limiting the moveme t of sa d' econd element y p ns. and means for transmitting the, force ofthe. sec.. 0nd or heavierspring: to the first strand engaging element;

, HARRY G. LIND.

REFERENCES. CITED The following references. are. of record in the me of thisv patent:

UNITED STATES PATENTS Number Name- Date 682,77Q Wardwell Sept; 1-1, 1901 1; 2619-77 Colman May 28, 1918

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