US2370598A - Textile drawing mechanism - Google Patents

Description

Feb. 27,' 1945..' s. R. WALSH Em 2,310,598

TEXTILE DRAWING MEGHANISM Filed April 2S, 1941 2 Sheets-Sheet l IN V EN T ORS. @af/Wzze/ ff?. Mis/.JZ

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'Feb.27,1945. s. R. WALSH Em 2,370,598

TEXTILE DRWNWMEQHANISM Y Filed April 28, 1941 2 Sheets-Shef 2 i eass ATTORNEYS.

Patented Feb. 27, 1945 TEXTILE DRAWING MECHANISM Samuel Rushton Walsh, Valley Falls, and George Edward Repass, PawtucketkvR. I., assignors to H & B American Machine Company, a corporation of Maine Application Aprilv28, 1941, Serial No. 390,740 18 Claims. Cl. 19-13 1) This-invention relates to the drawing mechanism of drawing, twisting or spinning frames for,

operating on iibrousv textile materials, and more A particularly to a drawing mechanism of the class in which a short, endless rotatable belt or apronis used under the fibers of a moving strand of roving or sliver to support and transport the bers in their travel through a drafting zone to a forward'pair ofdrawing rolls from an intermediate pair of drawing rolls immediately preceding them.

It is the general object ofthe present invention to provide a drawing mechanism of the above type having an extensible belt run for 4, supporting the roving or sliver,l and improved means for varying and controlling the length of such belt-run as occasion requires for maintaining acontrol of the bers through the drafting zone A further object ofthe invention is to pro- 'vide elevatable belt-pushing means for applying f adjustable pressurel to the lower belt-run and for compressing together into varied degrees of closeness the portions of the upper and lower runs of the belt near to its front loop so as to lengthen or shorten the length of the active fiber-engaging portion of the upper belt-run by definite adjusted amounts, and in which said means will be movable about a pivot distal from and outside of the y zone of action of said belt-pushing means.

An'important feature of the invention relates to .the provision of a pivoted guide device for laterally guiding the endless belt which is arranged under the' bers, and means carried by and movable with the guide device acting on the lower run of the belt to push the belt against a roll disposed above the` path of -travel of the bers whereby a desired and definite elongation of the length of the upper run ofthe belt may be.

obtained by adjustment of the guide device 4and diierent adjusted positions relative` to the belt.

With these and other objects in-view, the invention consists of certain novel features of 1 with the top rolls removed.' I

Fig. 3 is a detailedV view, on slightly enlarged scale, of the drawing device of the present invention; and v a spinlt Fig. 4 is a detail view showing the form of the side plates and pivot-shaft receiving opening'of the guide frame shown in Fig. 3.

Referring first to Figs. 1 and 2 of the drawings, the usual roller beam of a spinning -frameor of a Speeder is shown conventionally at I0, and it has at spaced intervals therealong-a plurality of roller stands I2, of which one is shown in the present instance, invr which is rotatably mounted the lower front roll I3, with which coacts the usual top roll. I4. Onthe roll stand is adjustably secured the bearing block I5 in which is journaled the lower intermediate roll I6 and the lower back roll Il. A back top roll"|8 and an intermediate top roll I9 coact with the lower back roll I'I and the lower intermediate roll I6 respectively. The three lower rolls I3, ,I6 and I1, .are all posi- .tively driven at different speeds by the usual the intermediate roll I6 and the front roll I3 is greater, in order to give a large draft to the roving passing between these rollsand their respective coacting top rolls. lThe top rolls I4, I8'and I9V are all preferably covered with a. resilient material, such as leather, cork composition, natural '40 the associated belt-pushing means thereon into or synthetic rubber, which materials have been employed in.A the art; or, they canbe made of metal provided with a smooth operating surface, if desired. y

The lower front and back rolls I3 and Il are of the usual fluted or grooved construction, while the lower intermediate roll I6 is knurled or suitably roughened and drives the endless belt or apron 2| over which the roving or sliver (not shown) supplied from the back rolls Il and I8 to theintermediate rolls I6 and I9 is fed from these intermediate rolls to the front rolls I3 and I4. y

As illustratedy in Figs. 1 and 3, the belt 2-I Y passes between the intermediate rolls I6 and I9, runs forward with its upper belt-run 22 extending under and bent slightly upwardly around the front of the positively driven roll 23 rotatable in the bearing block I5, has its front loop 24 free and yslightly in advance of the roll 23 and ungulded vwith no encirclement of any guide member internally positioned within this loop, and then extends downwardly over the top of an adjustable support-bar 25 and thence rearwardly around the roll I6. The roll 23 mounted above the bers of the roving or, sliver is positively driven in a suitable manner. 'I'he fibers are supported upon the upper belt-run 22 of the moving leather belt or apron 2| and controlled by the intermediate control roll 23.

The top rolls I4, I8 and I9 may be weighted and held in place by various weighting' systems commonly employed in the art, such as, for example, a saddle and stirrup mechanism which is of .a well known construction in the art, and which forms no particular feature of the present invention.

The support-bar 25 is carried by and extends laterally across one end of a guide frame or cradle which is mounted at the other end upon a pivot-shaft 26 and comprises side plate members 21. The pivot-shaft 26 isrotatably supported in bearings 28 in the blocks I5 of a plurality of roller stands I2, or in other words, at intervals of eight to ten spindles of the spinning frame or speeder, as the case may be.` The side plates 21 are provided with upper recesses 29 to receive and nt around the reduced portions of the lower intermediate roll I6. The support-bar 25 is rigidly secured to the side members 21 of the guide frame and engages the outer surface of the lower belt-run 30 near to the free front loop 24 and pushes the upper and lower belt- runs 22 and 30 against the roll 23 to produce the desired amount of lengthening or shortening of the upper beltrun 22 relative to the arc ofl contact with the roll 23, as well as the desired extension or retraction of the front loop 24 with respect to the bite of the front rolls I3 and I4. l

The pivot end portions of the side plates 21 are shown provided with openings 3| of partially circular shape which receive and have a tight press-fit upon the correspondingly shaped mounting portion of the pivot shaft 26 whereby a swinging movement of the side plates 21 either upwardly or downwardly will result upon turning of the pivot-shaft in the proper direction by `the lever 33 iixedly secured thereto to raise or to lower the bar 25 the desired extent relative to the lower belt-run 30 and thus vary the relative `spacing between the roll 23 and the bar 25 and consequently the relative closeness to which the opposite belt-runs are compressed'toward each other 'by theaction of the bar 25 so that. the nose of the front loop 24 will-be positioned as desired.

Various non-circular pr polygonal shapes may be provided for the opening 2| of the side plates land for the cross-sectional shape of the intertting portion of the pivot shaft whereby a nonrotary mounting of the plates relative to the 'pivot-shaft 26 willbe obtained.

rection as it travels forwardly from the back rolls I1 and I8 to the intermediate rolls IB and I9.

'I'he present invention is not limited to the foregoing illustrated and described embodiment of a. three-roll drafting system as it is to be understood that it may be embodied in any of the draft stages of various other forms of drafting systems employing four and iive pairs of rolls without departing from the spirit of the invention. We desire it to be understood that we reserve the privilege of resorting to al1 the mechanical changes to which the device is susceptible.

the invention being defined and limited only by the terms of the appended claims.v

We claim: v

1. In a drawing mechanism, in combination, a single endless belt or apronv to support the roving or the sliver, means acting upon the lower run of the belt or apron, means adapted to laterally .guide the belt or apron and arranged for movement into different adjusted positions, the said first-named means being carried by and raised and lowered by appropriate movement of said guide means into any of its adjusted positions, and a roll disposed above the line of travel of the roving or the sliver against which the belt or apron is pressed by the action of the said iirstnamed means in any of its adjusted positions.

v2. In a drawing mechanism, in combination, a single endless apron or belt to support the roving or the sliver, a guide device for laterally guiding the shank of a stud 38 carried by the roller 'stand I2 for clamping the lever 33 in the diierent adjusted positions to which the lever is manually ably secured to the pivot-shaft 23 and these iingers which are of substantially ,fiat shape are inclined upwardly from the pivot shaft and adapted to guide the roving or sliver in its lateral dlthe belt or apron, said guide device being movable in a direction toward and from the sliver, means carried by saidguide'device movable bodily with the same acting on the outer side of the lower run of the apron or belt to push said belt upwardly, and means distal from said belt-pushing means operably connected to said guide4 device for moving it so as to adjust the position of said means in different adjusted positions.l

3, In a drawing mechanism, in combination, a single endless apron or belt having an upper run to support the roving or the sliver, a guide frame having spaced side members for laterally guiding the edges of the belt or apron and to vbe movable in a direction toward and from the roving or the sliver, means carried by and movable with said frame acting upon the outer side of the lower run lof the apron or belt to push the same upwardly, and means supporting the frame at one end .arranged for adjusting said frame and said belt-pushing means to adjust said upper ,beltu run to a desired length, said support means comthe line of travel of the roving or sliver extending transversely of and acting upon the lower -run of the belt or apron for pushing it against said roll, and spaced side members disposed at opposite side edges of the belt or apron to laterally u guide the same, said side members being connected together at one end by said bar and pivoted for swinging movement in unison into different vertically adjusted positions so .as to vary the relative spacing between said bar and said roll and to correspondingly regulate 'the distance between the upper and lower belt-runs whereby various desired extended lengths of the upper belt-run will be obtainable,

5. In a drawing mechanism, in combination, a

v single endless belt or apron to support the roving or the sliver, a roll disposed above the line ofl of the beltor apron for pushing it vagainst said roll, and spaced side members disposed at opposite sideY edges of the beltor apron to laterally guide the same, said side 'members being conn ected together at one end by said -bar and e pivoted at their other end for swinging movement in I unison into different vertically adjusted positions so as'to vary the relative spacing between said bar and said roll and to correspondingly regulate the` distance between the upper. and lower belt-runs `whereby various desired extended lengths of the upper belt-run will be obtainable. t 6. In a drawing mechanism, in combination, a' single endless belt or apron -to support/the roving or the sliver, a roll disposed above the line of travel of the roving or the sliver against which the belt or apron is to be pressed, a bar below the line of travel of the roving or sliver extending transversely of and acting upon the lower run of Athe belt or apron for pushing it against said roll, and spaced side members disposed at opposite side edges of theubelt or apron to laterally guide the same, said side members being connected to.

disposed above said member and positioned above the line of travel of the belt or apron, and pivotal means supporting said member and adapted to move it into diiferent elevated positions to push said belt or apronagainst said small roll, said means comprising a guide frame having spaced sidev members between which said belt or apron moves and swingable` relative to said beit to raise said member into various adjusted positions to lift the belt a desired and varied extent and push it against the small roll.

9.- In a drawing mechanism, in combination, a

positively driven roll, an endless belt on said roll having an upper belt-,run arranged for conducting the roving o'r sliver. to the drawing rolls, a

positively driven small roll disposed above the `line of travel of the roving or ysliver and positioned in cooperating relationship with the forward portion of the upper run of said belt, a member beneath said small roll acting against the outer side of the lower run of the belt to support the forward portion thereof, the front looptpart of said belt extending through the gap between said member and said small roll and being guided solely thereby, and two spaced pivoted arms forming a pivoted support on which said member for engaging the lower run of the belt is mounted.l

f seid member beingl movable beduy toward ene theA same, and means forturning said rotatable member to move said side members and said. bar into a desired position to adjust the operating part oi' the belt or'apron't a desiredlength.

'7.In a drawing mechanism, in combination, a

.single endless belt or'apro'n to support the roving or the sliver,'a roll disposed above the line of f travel of the roving or the sliver against which the belt or apron is to be pressed, a bar below the line of travel of the roving or sliver ex against said roll, and spaced side -members dis-Y posed at opposite side edges of the beit or apron to laterally guide the same, said side members vided with. a non-circular opening, a rotatable from said small roll by appropriate pivotal movement of said pivoted support so as to vary the'gap between said member and said small roll and control the relative spacing between said forward portions of th upper and lower belt-runs whereby the eilective working length of the upper belt-run is adjusted and controlled.

10. In a drawing mechanism for textile slivers or rovings,rthe combination oi positively driven bottom draft rolls of successively greater surface 'velocity, top rolls coactlng with said bottom rolls.

an'endless belt or apron on a positively driven bottom roll of less velocityy for conducting the roving or sliver to a pair of cooperating top and bottom draftrolls of higher velocity. a member the line of travel of the belt or apron, and a pivoted frame having spaced arms connected at their outer ends by said member and adapted to move it bodily into diiferent elevated positions to push said vvbelt or apron against said small roll,

member supporting said side members for swinging movement in unison provided with a non-circular portion of corresponding shape as the said openings in the side members'and received by s and tightly fitting the same, an arm Vamxed to vsaid rotatable member for manually turning the same to eiect movement of said side members and saidbar into a desired adiusted position to obtain a desired length of the upper belt run, and means for securing said arm in its various adjusted positions.

8. In a drawing' mechanism. the combination of positively driven bottom draft rolls of successively greater surface velocity, top rolls coacting with said bottom rolls. van endless belt or apron on a positively driven bottom roll of less velocity for conducting the roving or sliver to a pair of top and bottoni rolls 'of higher velocity, a movable member acting on the outer side of the lower run of the belt or apron, a positively-driven small roll the pivot for said neme being internem seid being connected together at one end by said bar, belt-pushing member and outside of the 'zone ot the other end of said vside .members being pro-v` lower `roll of the set forming the feed-rolls forthe other set of drawing rolls, said belts or aprons each having an upper part extending between theassociated lower roll and its companion upper. roll and thence running forwardly toward the other set of drawing rolls for conducting the roving or sliver thereto, a roll of smaller diameter than any of said drawing rolls positioned intermediate thereof above the line of travel of the moving roving or sliver from said feed rolls to said forward drawing rolls. said small roll beins of such length .as to extend laterally over' the forward part of all the upper run portions of said belts or aprons, a plurality of members in tei-mediate said drawing rolls beneath said small roll each member acting on. the outerside of the lower run of a belt or apron to push the same and swingable in vertical planes, each pair of arms being connected at their outer end portions by one of said belt-pushing members, a

single' pivot shaft upon which all of said arms i are mounted for simultaneous swingingmovement when said shaft is actuated, and a single control element for the said pivot shaft whereby all of said arms will be actuated in unison and cause all of said belt-pushing members to operate,

simultaneouslyon the lower runs of the belts or aprons so as to vary the distance apart between the said small roll and the said belt-pushingl .members and to adjust the forward part of the upper run of each of said belts tol a desired length.

12. The combination with a cradle for long draft spinning frames and an actuating member for the cradle having a portion of geometric shape, the cradle comprising two spaced side plates united at the front part by a cross-bar which serves as a guide over which slides an endless belt, each side plate having its top edge portion formed with anotch to receive a roll for actuating the endless belt, and means in each side 'y plate' distal from said cross-bar having a geol a framefor laterally guiding the belts or. aprons said plates andmaintains 'them separated at a distance corresponding tothe width'of the belt, said'cross-member being disposed beneath the roving-engaging element that coacts with the upper belt-run and engagingtheouter Aface of the lower run of the belt, and support means for said i plates connecting' together the tail parts of the plates. said means being pivotal'ly arranged forv actuating said plates and said cross-member to swing them into vertically adjusted positions and maintain said cross-member and the coacting element for the upper belt-run separated at the required distance apart-for forcing the belt'against its coasting element withthe necessary pressure to adjust the eective operating length ofthe upper belt-run to the desired extent.

16. V.In a textile drawing mechanismtne-combination of positively-driven lower rolls, top rolls coactlng with said'lower rolls, an endless travelmetric shape corresponding to that of the said portion of the actuating member whereby rota` tion of said actuating member provides adjustment of the cradle.

13. The combination with a cradle' for long draft spinning frames and an actuating member for the cradle having a portion of geometric shape, the cradle comprising two spaced side plates rigidly connected at the front part by a cross-member which serves as a guide over which slides an endless belt, each side plate having its top edge portion formed with a deep notch to receive a bottom roll for actuating the endless ing belt on a lower roll-for conducting the roving to a forward pair of top and lower rolls, the front loop of said belt being free and capable of elongation when squeezed from opposite sides, a movable cross-member engaging the outer face of the .lower run of the belt, a positively-driven small rolldisposed above said cross-member and coacting with the upper run of the belt, and pivotal means 'for guiding` said belt, said means including said cross-member and comprising a frame having two spaced side plates arranged for laterally guldingthe belt and swingable relative belt, and means at the rear part of each side plate y having a geometric shape corresponding to that of the said portion of the actuating member thereto to adjust said cross-member into its various elevatedpositions'for positioning the crossmember and said small. roll the required distance apart and forcing the belt with the necessary pressure against the small roll to squeeze together the opposite run portions of the front loop of said belt whereby said front loop will be elongatedand adjusted to the desired extent relative tothe nip of the drawing rolls receiving the roving from said belt.

whereby rotation of said actuating member provides adjustment of the cradle.

14. In a textile drawing mechanism, the combination with an endless belt actuated b`y a positively-driven roll, and an element coacting with f the upper run of said belt for engaging the roving \plates and the cross-member in unison to move them so as tovposition and hold the cross-member and the element coacting with the upper belt-run 6 the desired distance, apart `for forcing the belt against the said coacting element with the necessary pressure to adjust the effective operating length of the upper belt-run. 15. In a textile drawing mechanism, the coin-v bination with a lower endless belt having. a free iront loop and actuated by a positively-driven roll within the rear loop of said belt, and an element enacting gazing the roving and conducting it to the draw:v ing rolls, of two movable plates one at each side of the belt for laterally guiding said belt, said plates being formed with notch portions for reoeiving lthe driving roll of the belt, a cross-member that rigidly connects, the forward parts of th the upper run of the belt for en- 17. In a textile drawing mechanism'the com- Yblnation' of positively-driven bottom draft rolls cross-member/to be raised and lowered engagingv the outer face of the lower run of said belt, a posiof successively greater surface velocity, top rolls coacting with said bottom rolls, an endless belt having its rear loop about and in operative relation with a. positively-driven bottom roll of less velocity, said belt being adapted to move in the same direction with the roving for positively feeding Vthe roving to a forward pair of top and bottom draft rolls of higher velocity, the front loop of said belt being close to said last-named pair of draft rolls and capable of elongation when squeezed from opposite sides for varying the effective operating length of the upper belt-run. a

tively-driven small roll disposed above said crossmember and coacting with the upper run fof the l belt. and pivotal means incorporating said cross- -member and adapted to laterally -guide said belt,

said means beingepivoted below the line of travel of' the roving and intermediate the'belt-drlving roll and the bottom roll-:of the drafting stage 'immediately precedingthe'draft stage in which said belt and said cross-member operate, said means -being operative upon appropriate movement to raise or to lower saidcrbss-member and adjust it in desired elevated positions thereby positioning the cross-member and said small roll the required distance apart for forcing the belt with thepnecessary pressure against said small roll to squeeze together the opposite run portions of the front loop of said belt whereby said front loop will be elongated andadiusted to the vdesired dis-- l0 front loop.

plates associated with each enlarged portion in which each cross-member is arranged at the forward part of these plates for engaging the outer face of the lower run of an endless belt to form a support over which slides the front loop of the belt, and means engaging said side plates at their rearward-parts for swinging said plates to vary the position of said'cross-mernber which supports said front, loop of the belt, thereby to vary said SAMUEL RUsHToN WALSH. GEORGE EDWARD REPASS.

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