US381617A - Whip-roll for looms - Google Patents

Description

(No Model.)

D. DURKIN.

WHIP ROLL FOR LOOMS. No. 381,67. Y Patented Apr. 24, 1888.

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UNITED STATES PATENT @trice DANIEL DURKIN, OF NORTHBRIDGE, ASSIGNOR TO GERGE DRAPER- 85 SONS, OF HOPFDALE, MASSACHUSETTS.

WHlP-ROLL FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 381,617. dated April 24, 1888.

Application `filed August 3], 1857. Serial No. 248,373i (No model.)

To @ZZ whom it may concern:

Be it known that I, DiiNrnr. DURKIN, of Nortl1hridge,county of Worcester', and State of Massachusetts, have invented an Improvement in Whipdtolls for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

In accordance with this invention the yarn to be woven into cloth as it passes from the yarnvbeam to the heddles is carried over a bearing-roll, thc journals of which are supported in yielding boxes so located that the said roll, under strain applied to the warp in weaving, is free to be moved substantially horizontally toward and from the breast-beam and fell of the cloth.

In looms for weaving cotton cloth,to which my invention is chiefly applicable, the take-up usually continues to operate even after the weft in the shuttle runs out and until the loom is stopped, and under such circumstances, to

l avoid the formation of thin stripes in the faloric, it is customary to turn the take-up roll or mechanism backward by hand for about the number of lost picks; but if the mechanism so operated by hand be turned back foradistance less than to compensate .for the lost picks a thin stripe will appear in the cloth, and if turned back for a distance greater than necessary the cloth when the weaving is again coinmenced will show a thick stripe. These evils, apparent in most cotton cloth, are obviated by the employmentof the yielding bearing-roll herein shown, which is free to move horizontally to a limited extent, under the action of a spring, toward the breast-beam or toward the fell ofthe cloth.v So, also, if for any reason the shuttle should be caught in the shed as the lay is being moved forward, the extra strain exerted upon those warpthreads immediately above and below the shuttle will be sufficient to cause the movement of the bearing=roll toward the breast-beam or the fell of the cloth, thereby preventing the warp from being broken, the yielding bearingroll thereafter tak ing back the said warp-threads or taking up the slack therein as soon as the shuttle is removed. As thelathe beats the filling into the cloth, the blow of the reed on the filling pulls the bearing-roll somewhat forward against the springs supporting it, such operation being repeated at every pick. The springs supporting the bearingroll are of such length and stiffness as to permit the said roll,iu casca shuttle is caught in the shed when the lay beats np,to move far enough toward the harnesses to prevent what is called a smash7 in the Warps, or to prevent the warps being broken.

Figure l,in side elevatiomshows a sufficient portion of an ordinary loom to enable my iuvention to be understood. Fig. 2 is a partial top view of Fig. l; Fig. 3, a partial sectionin the line a', Fig. 2, showing one ofthe arms for supporting the yielding roll; Fig. 4, a section in theline x, Fig. 3, parts being in elevation. Fig. 5 is a modification showing the box for the bearing-roll as adapted to slide iu a rigid or stationary guidingarm.

The loomfframe A, the yarubeani B, harnesses C, having heddles 8, lay D, links E, crank-shaft F, and reed A2 are and may be of any usual shape and construction.

Upon the fra-me A are erected two uprights, ce, which receive a shaft, Z1, having attached to it by suitable screws, 2, two arms or bearings, c, which, as herein shown, are slotted to receive the journal-boxes for the journals oi' the bearing-roll f, said boxes resting upon spiral springs e. Each of these boxes emitted to slide in a slot which guides it as the bearingroll is moved toward the breastbeam by the strain of the warp upon it, has a foot, d, which enters one of the said springs e, the said feet forming a connection to prevent the disen- 85 gagement of the boxes from the springs, or their movement laterally out from their guidingslots in the arms or guides c, the lower ends of each of the said springs being so held in the said arms as to prevent them from be- 9o ing moved ont laterally from the slots of the arms or guides c, the said connection being herein shown by means of a socket in the arm or guide c, which leaves a wall, m, (see Fig. 4,) to surround the said spring.

The foot on the box and the socket referred to to receive the spring are effectual in preventing lateral movement of the said spring out from the slot in the arm c.

The shaft b may have attached to it at one end an arm, g, which may be connected to a link, h, extended through a guide, n, the link ICO having a spring, h', upon it, which normally acts to keep the bearing-roll f'elevated, as shown in Fig. 1, the said rod actuating any usual let-off mechanism.

The warp-yarns are all led from the yarnbeam B up over the yielding bearing-rollf, thence into and through the heddle-eyes of harnesses of usual construction, and thence the said warp yarns are passed, as usual, through the dents of the reed over the breast-beam 9, and to a cloth receiving or take uproller. (Not shown.) The slots in the arm c form substantially horizontal guides for the boxes d in their movement under the strain of the warp on the rollerf.

W'hen the shed is bein'g made for weaving, the warps are subjected to their maximum strain, and the rollf is somewhat depressed, and at such time, if necessity demands, the boxes holding the journals of the yielding bearing-rollerf are free to be moved in a substantially horizontal direction in the slots in the arms c, and toward the breast-beam and fell of the cloth, thus giving up, as it were, a portion of the warp-threads, the closing of the shed, however, relieving the strain of the warp-threads upon the yielding-bearing-roller fand permitting it to be moved by its springs away from the breastbeam or fell of the cloth, thus taking up the extra slack in the Warp. The rod h, when the bearing-roll is made to vibrate by reason of the strain upon it, may, in practice, actuate a let-off, as in United States Patent No. 289,420.

The boxes cl will preferably have a flanged edge at d, (see dotted lines, Fig. 3,) the flanges preventing the lateral movement of the boxes outwardly from the arms c.

In Fig. l the boxes d are shown as depressed somewhat into the slots in the guide-arms c, as they will be when the strain of the warp on the yielding bearing-roll is about at the minimum, as when the shed is open and loom working properly.

Prior to my invention I am aware that a roller over which warpyarns are extended has been supported upon a spring.

It is absolutely essential to the practical 0peration of the mechanism herein described that the warp-threads be extended between the usual warp-beam and heddles over a roller which is free to rotate as strain is put upon the warp, which tends to take it from the usual warpbeam, for were a non-rotating bar employed instead of the roll the friction and strain upon the warp-threads would be so great as to be destructive to the operation of the parts for the production of the results accomplished by my invention.

In Fig. 5 I have shown a modification wherein the boxes are free to slide in slotted guides formed in the uprights a.

I claim- 1. The breast-beam, and warp-beam, and bearing-roll f, and boxes to support itsjournals or ends, and guides for the boxes, combined with springs io-operating with the said boxes to permit the bearing-roll to be moved bodily in a substantially horizontal plane toward and from the breast-beam and the fell of 7o the cloth, and with the rod or shaft b, arm g, and means to act upon the said arm to vibrate the said rod or shaft and bearing-rail, to operate all substantially as and for the purpose set forth. Y

2. The bearing-roll f, the boxes d, having feet d3, and the springs e, to engage the said feet, combined with the socketed and slotted arms or guides in which the said boxes are free to slide, the said boxes receiving in them the journals of the bearing-rollf, the springs and feet preventing the escape of the boxes from the slots of the arms or guides, substantially as described.

3. The bearing-roll f, the boxes d,having feet d, and the springs e,to engage the said feet, combined with the socketed and slotted arms or guides in which the said boxes are free to slide, and with the shaft b, carrying the said arms or guides, the said boxes receiving in them the journals of the bearing-roll f, the springs and feetpreventing the escape of the boxes from the slots of the arms or guides, substantially as described.

In testimony whereof I havesigned my lname to this specification in the presence of twosubscribing witnesses.

DANIEL DURKIN.

Vitnesses:

E. D. BANCROFT, C. E. LoNGrELLoW.

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