US2602607A

US2602607A - Traverse mechanism

Info

Publication number: US2602607A
Application number: US24804A
Authority: US
Inventors: Calvi Giovanni Battista
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-05-10
Filing date: 1948-05-03
Publication date: 1952-07-08
Anticipated expiration: 1969-07-08

Description

July 8, 1952 G. B. cALvl TRAVERSE MECHNISM 4 Sheecs--Sheel l :Filed May 3, 1948 EGE/VTS.

July 8, 1952 i G. B. CALVI 2,602,607

TRAVERSE MECHANISM Filed May 5, 1948 4 Sheets-Sheet 2 INVENTOH.

July 8 1952 G. B. CALVI 2,602,607

TRAVERSE MECHANISM Filed May 5, 1948 4 Sheets-Sheet 3 Ilm I l JNVENTQR. w1/1mm afisla Cal u July 8, 1952 G. B. cA| v| 2,602,607

TRAvERsE MECHANISM Filed May 5, 1948 4 sheets-sheet Patented July 8, 1952 UNIT applicaties Mays, 194s, sensi Ns'. 24,804 Iny Italy May 10,194?

The present invention relates to a mechanical device for distributing and winding yarn on botu tle bobbins or the like.

In the known devices meant for the same work, for the filling of the bobbins, the spoolers require apawl provided with a thread guide which, sliding on the same thread of the bobbin, displaces itself gradually, while another device causes alternating motions to the thread guide and therefore provokes the formation of successive truncated cones of yarn on the l"bobbins The result is that, owing to the unavoidable irregularity of the winding tension of the yarn fed to the bobbin, the working of said pawl is not always accurate and therefore an irregular winding of the yarn on the bobbin takes place.

Moreover, in the known types, there is a further drawback when winding very thin yarn, for instance silk, viz. it is necessary to keep a very low winding speed, because otherwise the yarn breaks.

Moreover, in the known types, in order to take into account the different winding diameter of the yarn during the successive rotations of the bottle bobbin, it is necessary to provide a continuously operative device by which, at every moment, the rotation speed of the bobbin is varied in order to keep constant the winding speed, in spite of the continuous variation of the diameter according to which the yarn is wound up. The necessity for the continuous operation of this device further necessitates a very low rotation speed of the bobbin.

rlhe device, according to the invention, eliminates all these drawbacks and presents at the saine time further advantages.

The mechanical device for distribution and windingof yarn according to the present invention is characterised by the fact that, in addition to known means for varying the speed transmitted between the motor and the principal member operated by it on the machine, there is provided a mobile equipment continuously displaced in the direction of the axis or the bobbin from its larger diameter to the smaller, a mecha' nisrn, provided with a thread-guide, carried by said mobile equipment, and with an alternating motion, in the saine direction of motion as the mobile equipment, and mechanical means for giving to said mobile equipment and to said 5 mechanism velocities exactly connected with each other and in precise and mathematical reciprocal relation, as well between themselves, as with the rotation speed of the winding bobbin.

The device is further characterised by the factl i Claims. (Cl. 242-158) that known means are provided in order to modify thev ratio between the mobile equipment velocity and the rotation velocity of the bobbin.

The device is further characterised by the fact that known means are provided in order to modify the ratio ybetween the velocity of the mechanism provided with the thread-guide and the displacement speed of the mobile equipment and therefore the rotation velocity of the bobbin.

The device is still further characterised by the fact that special means are provided for automatically stopping the motion of the mobile equipment, when it has reached the end of its active course, viz. when the bobbin has been completely lled, these means being also used, when this has taken place, to bring back the mobile equipment to the beginning of its active course for the winding up of a new bobbin.

In the annexed drawings there is illustrated. by way of example, a preferred embodiment of the invention:

Figures 1 and 2 show external sideV views, at right angles to each other, of the machine provided with the device according to the invention; Figure 3 shows a plan view of the machine, partly in full and partly in horizontal section along plane IIL-ill of Figures 1 and'Z; Fig. 4 shows a partial section along plane IV-IV of Fig. 3; Fig.

V5 represents a schematical partial section along plane V-V of Fig. 3. Fig. 6 shows a schematical partial section along plane V-V of Fig. 3A Fig. i represents, on a largerscale, a partial schematical section along plane VII- VH of Fig. 3 and Figuresfrom 8 to l12, show, still, on a larger scale, respectively a plan view in the direction of arrow VIII, the sections IX-X, XX, XI-XI and the view from below of section XII-XII of Fig. 7 for the group illustrated in that figure.

The main shaft l of the machine is operated from motor 2 by means of

pulleys

3 and 4 and a belt B. On shaft l are mounted, longitudinally slidable by means of keyways li, the friction discs ii, one for each bobbin foreseen on the machine, and on the hub of disc 6, by means of ball-bearing "l, is mounted the end 8 of arm 5l ending in a cross-piece lil toothed on top as a rack, which slides on aguiding surface Il of the machine frame and `engaging a toothed wheel l2 carried by shaft i3 connected to head lil provided with a 'handle i5 which operates the successive positions, in axial direction, of friction disc 6, by means 'of the click device i6 and shell shaped disc Il. The friction disc S cooperates with anotherv frction'disc I8, mounted on shaft I9 of bobbin 2t. These details are repeated for each bobbin foreseen on the machine so that only the mechanism cooperating with one of the bobbins will be described.

On shaft |9 is mounted an helical gear 2| which engages helical gear 22 mounted on shaft 23. On one side of the latter is mounted pinion 24 engaging pinion 25 which operates shaft 26 at the end of which, inside a liftable lid 21 and by means of nut 28 is mounted thepini'on 29. r-Jhe latterengages pinion 33, also mounted, by means of nut 3|, on shaft 32 which, at the other end, carries the helical gear 33 engaging helical gear 34 mounted on vertical shaft 35, theoperation of which will be described later on. vAt the other end, shaft 23 carries the Ypinion 33 'which by engaging pinionwl',V l`Cf 1lia-tes shaft 38, which, by means of the helicaljgear operates helical gear 43 mounted on shaft-343|, the operation of which will be describedlate'r on.

Shafts 35 and`4| are ,parallel to each other and are supported bybearings fitted abovevandbelow `onfa fixed support-42 of the machine; Vshaft 35 has 'a threadedpor'tion 43 and shaft 4| hasa longitudinal groove A44; on said shafts is mounted a mobileequipment, particularly illustrated by Figures 7 and Yl2. VSaid mobile equipment consists of a 'tubular element 45 which, with the Aend sleeves r46 and 47, is sldably mounted on the external diameter-of thread 43; at vtop and bottom ends of the tubular element '45 are mounted the hubs 48 of arms 49. Above top arm 49, freely Vrotatable on shaft 4|, is mounted the cross-piece 50, which, urged by spring carried by'arm 49, has a tendency to rotate in the direction of arrow '52, so 'that the semicylindrical end 53 threaded on its internalsurface rengages `thread 43 of shaft 35.y B y acting, Vat any moment,V on extension 54 of cross-piece v5u in the direction of arrow 55, it willfbe possible to disengage, at will, the mobile 'equipment from the thread 43.

A pinion 53 is mounted on the lower arm '49 Vand by'means of key 51 engages groove 44 of shaft 4|` and vis driven by it; Vpinion'56 engages pinion 58"'m'ounted on shaft: 53, supported for rotation by top "and bottomifalrms 49 and having two threadsi and 'Blfwith opposed inclinations convenientlyijoined at the top and at .the bottom Vin 52 and 63.

Inside said grooves iseng'aged the end of aprovlonged button 65 introduced into the cylindrical .cavity 6 S`vf arider |61 and kept therein by a Vsetvscrew SS.. ',Button`j`65 `is freely rotatable `around its axis, inside cavity 66. 'Iherider '61 is 'provided with the small rodg'which passes .at the exterior of tubular element 4,5 thus hindering the rotation of element E1; uitisaflsoprovided Awith thread v guide X19,

It Inustbe observed that, on top, shaft 35 has a'portion 7| of a diameter corresponding to that of the threaded bottom of screw 43. On an uprightpiece 'l2 of the machinegis'mounted by means of pivot 13a ,rocking double lever 14,

which, at one end is loaded fwith an adjustable Vyarn will pass from parafn .roller '|6 to thread guide '|0.

The operation of the device-is as follows:

The bobbins will rotateatan angular velocity depending on the gearratio adopted for pulleys ,Y v43jand 4 used and depending also on lthe regulaity which is a function ofthe rotation velocity of the lcobbin-carrying shaft.

The rotation of the shaft 35 is such that the mobile equipment; through the engagement of thesemicollar 53 with thread 43, displaces itself gradually, at-a-constant speed, in the direction of :arrow l. This motion will take place till the momentin which semicollar 53 arrives at the top portion 1| Aof shaft 35; then, the disengagement 'of the mobile equipment from shaft 35 will take place and the mobile equipment will stop. This will happen, when the whole bobbin will have Vbeen wound up.

vAt the same time, the .rotation of shaft 4|, through

pinions

56 and 53 will causethe'continnous-rotation of shaft 53` and rider 3l will laccomplish alternating motions by the cooperationl of nger andthe double thread 63, 5|; the amplitude of these alternating runs will correspond to the truncated cone portion of the'bobbin.

During the winding 'up of a truncated cone layer on the bobbin and in consideration of the fact that the bobbin rotates at aconstant angular speedftheconditions of the winding up ofthe .yarn are continuouslyV variable; in spite of this, the winding up will take placerin a perfect mannerand under a regular tension of the yarn, be-

cause owing to the presence of the parain roller 76, the disposition, taken by the yarn, is continuously variable viz. v it causes a continuous variation of `frictional resistance of the yarn on thread-guide 1G, softhat the portion of yarn going from thread-guide 1E! to the bcbbin is substantially `:submitted always to the same tension. Thisis due to the pendularoscillations made by arm 'lli-on pivot 'I3 and bythe different-direction of the thread-guide 'm in relation with the paraf- `inroller 'i5 during each alternate-runof threadguide' 73.

iFrom what has been said above it results that bythe use of `the device-according to the invention, a perfect vhomogeneity of winding up is attained, that'the bobbin'canrotate-at a higher lor-lower speed according to the count of the yarn to be wound up, that the rotation speed of the bobbin controls also the motion speeds of the other parts of the-device, that the lifting speed of the mobile equipment inthe direction of arrow 79 can'be adjustedin relationvwith the count of the yarn to wind up, by changing the pinions 29,

fand lastly that, owing to the fact that by the elimination of all the causes which compelled to keep a' very low speed when winding up coarse 'counts of yarn in the known devices, by the device Iaccording to the invention, it is possible `to use very high winding'speeds and, therefore, to exploitat the utmostthe production of the machine. Lastly, the motion of the thread-guide 70 being perfectly and mechanically operated, as well inthe ralternating runs, as inthe general motion of the lifting of the mobile equipment,

the winding will be done in the most perfect conceivable manner.

Moreover the device is self disengaging Awhen the bobbin is completely wound up.

Although, for descriptive reasons, thev present invention is based on what has been described and illustrated only by way of an example, many practical modifications can be made to the vembodiment of theinvention, all based, though, on the fundamental conceptions of the invention, covered in the following claims.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I

declare that what I claim is:

1. In a lbobbin Winder having an upright bobbin spindle, drive means and a variable speed transmission between the drive-means and spindle, the provision of a yarn distributing device comprising two vertical shafts, gear means connecting each shaft for rotation with the bobbin at a, speed Which is a function of the speed of the bobbin, the first shaft being externally threaded and the second having a longitudinal groove, a yoke surrounding both shafts and having means releasably engaging the thread of the first shaft thereby to move the yoke longitudinally of the shafts, a vertical screw journalled in the yoke and having opposed intersecting threads with connecting ends, a first gear keyed to the screw, a second gear journalled in the yoke coaxially with the second shaft and engaging the first gear, a pin projecting radially inwardly from the second gear to engage in the longitudinal groove to rotate the second gear with the second shaft and permit longitudinal movement of the yoke, and a thread guide mounted for longitudinal movement on the screw and including means holding said guide against rotation and means engaging in the threads of the screw.

2. A device as in claim l wherein the yoke comprises a tubular member surrounding the rst shaft and having two arms extending therefrom,

the screw being journalled vbetween the` two arms.

3. A device as in claim 1 wherein the gear means comprise replaceable gears for varyingV the speed of rotation of the shafts relatively to each other. l

4. A device as in claim 1 including a variable friction drive mechanism for varying the speeds of the gear means relatively to the bobbin.

GIOVANNI BATTISTA CALVI.

REFERENCES CITED The following references are. of record in the file of this patent:

UNITED STATES PATENTS