US1757409A - Warper - Google Patents

Description

C. D. BROWN May 6, 1930.

WARPER Filed Dec. 21, 1928 2 Sheets-Sheet l Invenror.

Carl D. Brown bymMkW C. D. BROWN May 6, 1930.

WARPER Filed Dec. 21, 1928 2 Sh68tS-5h8et 2 lnvenror. Carl D. Brown bym WyW Atty:

Patented May 6, 1930 UNITED STATES PATENT OFFICE CARL I). BROWN, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER CORPORATION, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE WABPER Application filed December 21, 1928. Serial No. 327,547.

This invention relates to a warper for winding warp yarns drawn from a suitable supply such asa creel onto a warp beam of that type in which the Warp beam rests against a P driving drum and is rotated by the frictional a construction in this type of warper which,

will enable the warper to be run at the high speeds now demanded by the trade. WVhen a warper of this type is run at high speed, the warp beam frequently jumps and vibrates, injuring the yarn more or less and preventing the yarn mass being wound under even tension and with the desired degree of homogeneity.

his the object of the present invention further to provide friction-controlled means acting to prevent such jumping or vibration I of the warp beam in which the amount of friction shall be gradually reduced as the total weight of the beam increases due to the increase in the weight of the yarn mass as the winding operation proceeds.

It is the further object of the invention to provide such a construction in which the friction-controlled means acts upon any movement of the beam toward the driving drum to present a greater resistance at the end of such movement than at the beginning to a continued or further movement of the beam away from the driving drum so that jumping or vibration of the beam is reduced to the minimum.

It is the further object of the invention to provide for the adjustment of the frictioncontrolled means to accord withthe condi tions prevailing in a particular warper and also to provide means for enabling the beam to be doffed and a fresh beam put in place without disturbing the adjustments.

The object of the invention is further to provide a simple, eilicient and durable form of construction operating upon the friction control principle for enabling this type of warper to be run at high speed Without deleterious jumping or vibration of the beam.

These and other objects and features of the invention will appear more fully from the accompanying description and drawings and will be particularly pointed out in the claims. Since the invention is concerned solely with the control of the warp beam during the winding operation, the preventing of the jumping or vibration of the Warp beam and the provisions for dotting the warp beam, and as the other features and mechanisms of the warper may be of any suitable construction and form, and as the general principle and operation of a warper are well-known and familiar to those skilled in the art, it is only necessary here to illustrate and describe those portions of awarper directly concerned with one preferred form of embodiment of the present invention.

In the drawings:

l is a side elevation of a warper with j a simple and preferredform of the invention embodied therein and with elements of the warper not concerned with the present invention omitted.

2 is a view on a larger scale of the friction device shown in Fig. 1, partially in vertical cross section and looking at theside thereof opposite to that shown in Fig. 1.

Fig. 3 is a view in transverse cross section taken on the line 33 of Fig. 2.

Fig. 4 is a detail view showing a clamp connection at one end of the friction band.

The warper comprises end frames such as l standing on the floor 2. A shaft. 3 mounted in suitable hearings n the end frames supports the usual driving drum 4 and is driven at high speed in any suitable manner from a suitable source of power. The warp beam may be of any suitable type comprising the of the drum with the beam barrel or the Warp mass thereon rotates the beam, winding the warp yarns thereon. The yarn mass 11 on the warp beam therefore gradually increases in diameter until the beam is filled. Conse quently also the total weight of the beam and yarn mass likewise gradually increases.

. Any suitable means may be employed for supporting the warp beam gudgeons so as to enable the warp beam to rest against the driving drum and to move away from the driving drum as the yarn is wound on the beam by the frictional engagement of the drum therewith. Such means, as well as the frictional controlling devices with which this invention is particularly concerned, are desirably the same at both sides of the warper so that it is sufficient to illustrate the construction at one side. .The means for supporting the warp seam gudgeons is shown as of an ordinary type. At each sideof the warper a supporting arm 12 is pivotally mounted on the stud 13 carried by a link 14 pivotedto the crank 15. By turningthe shaft 16, through interposed and familiar mechanism not necessary here further to describe, the crank arm 15 is turned about its axis 17 to lower and raise the arms 12 for dotting and replacing the beam. Each warp beam gudgeon 8 is supported in a bearing sleeve 18 seated in a hearing seat 19 formed on the supporting arm and a; bearing cap 20 pivoted at 21 serves to hold the bearing sleeve in place. Thus it will be seen that as the warp yarns are wound on the beam, the diameter of the warp mass increases and the supporting arms swing forward and upward as the beam moves away from the driving drum.

In this invention a frictional resistance is presented to control this movement of the warp beam and this frictional resistance decreases as the mass of yarn increases on the warp beam. It is desirablethat there shall be no great variation throughout the winding operation in the pressure between the driving drum and the warp beam. Otherwise the compactness of the warp mass will vary.

But as the total weight of the warp beam and yarn mass gradually increases from the beginning to the end of the winding operation, if this were the onlyfactor acting to cause pressure between the friction drum and the warp beam, this pressure would gradually increase. But with a friction-controlled device applied in addition to the warp beam; it'is possible to control the total effective pres sure between the driving drum and the warp beam as required and preferably so as to maintain it substantially uniform throughout the winding operation. Consequently in this invention the amount of friction acting to prevent movement of the warp beam away from the driving drum is gradually reduced from the beginning to the end of the winding operation so as to offset the increase in'the weight of the warp beam and yarn mass.

A preferred form of construction embodying the invention is shown in Fig. 1 and more in detail in Figs. 2 and 3 and, as noted, is

the same at both sides of the warper. A bracket 22 is bolted at 23 to the side frame 1 and extends upwardly therefrom beneath the supporting arm 12. This bracket is formed to'present an extended bearing hub 24 and in this hub is rigidly mounted a stud 25 extending parallel with the axes of the driving drum and warp beam. A friction drum 26 having the annular flange 27 and a base 28 is secured'to the bracket 22 and is w in place by a nut 35. This anchor stud extends transversely across and adjacent the flange 27 of the friction drum. A helical spring 86 surrounds the hub 32 of thearm and has one end 37 connected to the hub and the other end 38 connected to a collar 39 mounted and rotarily adjustable on the end of the stud 25 by means of a removable pin 40 extending through aligned holes in the collar and stud.

A friction band is connected at one end to the stud 33 on the arm 31 and extends therefrom encircling the friction drum and at its otherend is connected to the supporting arm 12. This friction band may be of any suitable material for the purpose. As illustrated, it comprises a heavy fabric strap 41, an intermediate steel strip 42 and a cork facing'43. At the anchor end the steel strip 42 is bent into a loop around the stud 33,

back upon the main body of the friction band 1 s and all the layers are there secured together by rivets 44. At some distance from'this end a suitable clamping member 45v holds the component parts of the friction band to gether, but from there on the strap 41 is free to separate from the other members of the band which are secured together at their opposite ends by a rivet 46. The other end of the strap 41 passes through the looped end .47 of a rod 48 'and'is bent back upon the body of they strap and clamped thereto between two plates 49 which are drawn together by bolts 50 passed through the plates adjacent the edges of the strap. The rod 48 extends throughbifurcatcd lugs 51 projecting from thebearing seat and bearing cap of the supporting arm and has pivoted to it at its upper end 52 a cam lever 53.

Stops for limiting the rotary movement of the arm 31 in either directionare provided 23:.

warp beam or supporting arm away from the and are shown as lugs 54 and 55 formed integral with and projecting from the base 28 of the friction drum.

The anchor stud 33 for the end of the friction band moves circumferentially of the fixedly mounted friction drum and the spring 36 acts yieldingly to move this anchor for the friction band in a direction opposite to the pull exerted by the warp beam through the friction band as the winding operation pro ceeds and the warp beam moves away from the driving drum. This spring 36 may be adjusted by rotarily adjusting the collar 39 so as to vary the tension exerted thereby on the friction band but when once adjusted the amount of resistance to the movement of the driving drum will be substantially dependent upon the length of the arc of the friction drum engagedby the friction band. When the beam is empty and the winding operation is about to begin, the length of this are may be adjusted by adjustingthe rotary position of the friction drum by means of the bolts 29 and by making the length of the friction band such as when connected to the supporting arm to stand taut. Then as the winding operation proceeds and the supporting arm moves away from the driving drum, the friction band steadily slips around the friction drum, drawing the anchor with it and coin sequently gradually diminishing the arc of its engagement with the friction drum. Consequently it will be seen that as the total weight of the beam and yarn mass increases, the frictional resistance opposed by this invention to the movement of the beam away from the driving drum decreases and the relation between the rate of increase and the rate cf decrease may beifixed as desired by proquently permitting the spring 36 to act to move the anchor in the direction opposite to the direction of pull on the friction band and consequently increase the length of the arc of the friction drum encircled by the friction band. It will be seen, therefore, that the device acts to neutralize or prevent jumping or vibration on the warp beam. Any such movement of the warp beam necessarily in volves both a movement away from and a movement toward the driving drum. The former meets the powerful resistance of the friction device while the latter, because of the principle just set forth, results in a greater resistance being presented to any continued or further movement of the beam away from the driving drum.

The invention thus presents a friction-controlled means resisting with a gradually reducing amount of friction the movement of the beam away from the driving drum and further acting to neutralize or prevent jump in or vibration of the beam as when running at high speed.

iv hen the beam has been wound full of yarn and it is desired to dolf the beam, the friction device will be exerting the minimum amount of friction. By seizing the free end of the lever 53 and rocking its cam end about theprojecting end of the upper lug 51, the bar i8 is readily pried out free from both lugs 51, thus freeing the beam supports from the friction device. -When a fresh beam is placed in position, the reverse operation is performed lthelever 53 in this case acts to stretch the iC'lilOl'l band firmly into initial position.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is

l. A warper comprising a driving drum, n warp beam supported to rest against the drum and to move away from the drum as the yarn is wound on the beam by the frictional engagement of the drum therewith, a fixedly mounted friction drum, an anchor movable oircumferentially of the friction drum, a friction band connected at one end to the beam, encircling the friction drum and connected at the other end to the anchor, and means for yieldingly moving the anchor in a direction opposite to'the pull exerted by the beam on the friction band.

2. A warper comprising a driving drum, a warp bear 1 supported to rest against the drum and to move away from the drum as the yarn is wound on the beam by the frictional engagement of the drum therewith, a fixedly mounted friction drum, an anchor movable circumferentially of the friction drum, a friction band connected at one end to the beam, engaging an extended are of the friction drum and connected at the other end to the anchor, and means for yieldingly resisting the movement of the anchor due to the pull of the friction band by the warp beam, the said movement of the anchor due to said pull acting gradually to diminsh the length of the arcof the friction drum engaged by the friction band and thereby the resistance to the movement of the beam away from the driving drum and the said yielding means acting to move the anchor in the opposite direction upon any movement of the beam toward the friction drum thus to neutralize vibration of the beam.

3. A warper comprising a driving drum, a warp beam supported to rest against the drum and to move away from the drum as the yarn is wound on the beam by the frictional engagement of the drum therewith, a

fixedly mounted friction drum, an anchor movable circumferentially of the friction drum, a friction band connected at one end to the beam, encircling the friction drum and connected at the other'end to the anchor, means for yieldingly moving the anchor in a direction opposite to the pull exerted by the beam on the friction band, and means for adjustably limiting the movement of the an hor in said direction. p

4. A warper comprising a driving drum, a warp beam supported to restrvagainst the drum and to move away from the drum as the yarn is wound on the beam by the frictional engagement of the drum therewith, a fixedly mounted friction drum, anv anchor movable circumferentially of the friction drum, a friction band connected at one end to the beam, encircling the friction drum and connected at the other end to the: anchor,

'means for yieldingly moving the anchor in a direction opposite to the pull exerted by the beam on the friction band, a stop lug on the drum for limiting the movement of the anchor in the said direction,'and means for rotarily adjusting the position of the friction drum thus to adjust the position of said stop lug.

5. A warper comprising a driving drum, 1 warp beam supported to restagainst the drum and to move away from the drum as the yarn is wound on the beam by the frictional engagement of the drumtherewith, a fixedly mounted frictionv drum, an anchor *novable' circumferentially of the friction drum, a friction band connected at one end to the beam, encircling the-friction drum and connected at the other end to the anchor, a spring acting to move the anchor in a direction opposite to the pull exerted by the beam on the friction band and means for adjusting the tension of said spring.

6. A warper comprising a driving drum, a warp beam supported to rest against the drum and to move away from the drum as the yarn is wound on the beam by the frictional engagement of the drum therewith, a fixedly mounted friction drum, a stud extending axially of the friction drum, an arm iournalled on the-stud and having its ends extending across the periphery of the fric-,

tion drum to form an anchor, a helical spring on the stud secured at one end to the arm and at the other end to the stud and a friction band connected at one end to thebeam, encircling the friction drum and connected at the other end to the anchor.

EA warper comprising the construction defined in claim 6, in which a collar is provided rotarily adjustably mounted on the stud and in which the helical spring is secured to the collar and thus to the stud, thus enabling the tension of the spring to be: adjusted'.

8. A warper comprising a driving drum,

a warp beam, a support for the warp beamacting to hold the warp beam resting against the drum and to movewiththe warp beam away from the drum as the yarn is Wound on the beam by the frictional engagement of the drum therewith, a cam device detachably mounted on the said support, a fixedly mounted riction drum, an anchor movable circumferentially of the friction drum, a friction band connected at one end tothe cam device,encirclin g the friction drum and connected at the other end to the anchor, and means for yieldingly moving the anchor in a direction opposite to thepull exerted on the friction band, the cam device when in working position acting to hold the friction band taut and when moved to detaching po sition acting to relieve the strain on the friction band. I

9. A warper comprising a driving drum, a warp beam having gudgeons, a support for the warp beam acting to hold the warp beam resting against the drum and to move with the warp beam away from the drum as the yarn is Wound on the beam by the frictional engagement of thedrum therewith, the said support having a bearing seat and a bearing cap for the warp beam gudgeon, a cam lever carried by the support, a fixedly mounted friction drum, an anchor movable circumfercntially ofthe friction drum, a friction band connected at one'end-to the cam lever, encircling the friction drum and connected at the other end to the anchor, and means for yieldingly moving the anchor in a direction opposite to the pullexerted on the friction band, the cam lever acting when in working position to lock the bearing cap in position and to hold the friction band taut and acting when swung to-doffing position to release the bearing cap and also to release the strain on the friction band.

In testimony whereof, I have signed my name to this specification.

CARL 1); BROWN.

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