US536969A - Warp stop-motion for looms - Google Patents

Description

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No. 536,969. Patented Apr. 2, 1895'.

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- C; F. ROPER.

WARP STOP'MOTION FOR LOOMS.

No. 536,969. n Patented Apr. 2, 1895.

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WARP STOP MOTION FOR LOOMS. No. 536,969. vPaAzented Apr. 2, 1895.

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STATES CHARLES F. ROPER, OF I-IOPEDALE,

PATENT Orrrcnci MASSACHUSETTS, ASsIeNoR To THE WARP STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 536,969, dated April 2, 1895.

Application filed September 4, 1893. Serial No. 484,723. (No model l) To all whom, it may con/067%:

Be it known that I, CHARLES F. ROPER, of I-Iopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Warp Stop-Motions for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like letters and figures on the drawings representing like parts.

This invention has for its object to improve that class of loom wherein the heddles, used to control the warp in the formation of the shed for the reception of the weft or filling, are made instrumental in automatically stopping the loom when a warp thread breaks.

The heddles in the form in which I have herein chosen to illustrate my invention are represented as composed of thin sheet-metal strips provided each with a warp receiving eye and with an elongated eye which is entered by a cross-bar of less depth than the length of said elongated eye, said cross-bar forming part of a harness frame, said elongated eye enabling the heddle co-operating with the warp threads put into the lower plane of the shed to be sustained wholly by said threads in such manner than when a warp thread in the warp, rather than at right angles thereto.

The elongated slots referred to enable the heddles to be moved longitudinally independently of the cross-bar of the harnessframe. In order, however, to enable those heddles co-operating with the unbroken warp threads in the lower plane of the shed to be properly held up out of the path of movement of said feeler I have had to combine with the described heddles strung on the cross-bar, as described, means for arresting the warp threads in what is to be the bottom plane of the shed before the crossbar of the heddleframe has completed its full descent to effect the opening of the shed, said arresting means being herein exhibited as rods or bars extended across the loom from side to side, one being located directly behind and the other directly in front of the heddles, and prefer whatever may be the form of the heddle.

ably close to the vertical plane in which the heddles are to move, the arrestingmeans, by supporting the warp threads close to where the said' threads hold up the weight of the heddles, preventing the uneven dropping of the heddles, as it is obvious would be the case owing to the very considerable distance between the usual whip-roll and the fell of the cloth.

A support for the warpv in the lower plane of the shed and near the vertical plane in which the heddles work is a necessity for the complete success of my invention, and this The employmentl of a thin sheet Vmetal heddle, as herein illustrated, in combination with a feeler moving parallel to the warp-threads is also advantageous, for in such plan the strain on a dropped heddle comes in the line of its greatest resistance to strain, which would not-be the case if the feeler should be worked in a line at right angles to the length of the warp.

In order to enable thin sheet metal heddles to be used and not be twisted out of shape when struck by the feeler in case a warp breaks, I have provided the loom with heddle guides made as bars independent of the harness frames, and notched for the reception of the edges of those heddles controlling the warp threads put into the lower plane of the shed, said notches also preventing any lateral dis placement of the lower ends of the lowered heddles. The feeler or vibrator is also notched at its acting edgeto embrace the edge of the heddle struck by it, both edges of a lowered heddle when struck by thefeeler being, it will be understood, embraced by notched portions of the guide-bar and feeler, and hence said heddles cannot be shifted laterally, or overturned, or twisted out of shape or bent. This provision to prevent lateral displacement of the dropped heddles, as well as to prevent them from being twisted or bent, is Aanother important feature of this invention. The feeler or vibrator herein shown, it constituting a part or member of a stop-motion mechanism, is also as. herein shown supported independently of the harness frames, thus reducing the weight of said frames, andconsequently the strain on the cording supporting said frames, and the power required to open the shed.

As before stated, the elongated slots at the ends of the heddles fit the cross-bars of the heddle-frames loosely and in such manner that said heddles may move vertically of the bars, the heddles, however, when the bar carrying them is depressed to thus put the threads controlled by it into the lowest plane of the open shed resting each one on a warp thread, each thread sustaining its own heddle and consequently in case any one thread in the lower plane of the shed should be broken the heddle which contained it may drop by gravity for a distance determined by the'slots referred to, thus placing the said heddle in the range of movement of a suitable vibrator or feeler forming part of a stop motion mechanism, the arresting of the movement of the vibrator or feeler causing the usual shipper handle of the loom to be released to disconnect the driving power from the usual power or cross shaft of the loom.

Figure l is a longitudinal section of a sufficient portion of a loom with my improvements added to enable my invention to be understood; the shed being shown as open. Fig. 2 is a right-hand side view of the loom, said iigure showing parts broken away from Fig. l. Fig. 3 is a plan view of the parts shown in Fig. 2. Fig. 4 is a detail enlarged of the heddle frame and heddles, such figure also showing a portion of the whip roll and portions of the warp stop motion mechanism. Fig. 5 shows one of the heddles enlarged. Fig. 5 shows three of the heddles side by side. Fig. 5b is a section in the dotted line Fig. n. Fig. G is a partial plan View of the vibrator or feeler co-operating with the heddle. Figs. 7 and 8 show parts of a heddle and parts of the devices co-operating therewith, the vibrator or feeler being shown in different positions. Fig. 9 is a detail to be referred to, said figure showing the controller for the shipper handle in different positions.

The loom frame A, the crank or lay shaft A' therein, having suitable fast and loose pulleys adapted to receive a belt under the control of a belt shipper A2, the cross or cam shaft A3, the lay A4 carrying a reed, the Whip roll A5, the shipper handle A, and the notched plate AT to hold it in place while the loom is moving properly, are and may be all as cornnion intloonis.

I have attached to the uprights AX, one at each side the loom frame, suitable like stands B having bearings for the reception of journals of one or more, preferably two, warp arresting or supporting devices illustrated as rolls or rods b, shown best in Figs. l and 3, said rolls or rods being represented as suiticiently separated to permit the heddles or harness frames to move between them. The warp arresting rods or rolls besides possessing the advantages hereinbefore stated also insure the retention in a definite and in substantially the same horizontal plane or level of all the warp threads iu the lower half of the shed, thus insuring a more uniform opening for the passage of the shuttle, and further, owing to the fact that the warps contact with the arresting devices, whatever tendency the individual warp threads with the weight of the heddles on them might otherwise have to sway or swing laterally is substantially negatived.

I have herein shown a loom having two heddle frames each frame being composed essentially of a bottom bar a, a top bar a', said bars being connected as shown best in Fig. 4, by side bars a2, thus making a rigid quadrilateral frame.

Each heddle frame has suitably attached to it heddle carrying bars c, the connection in this instance ot'l my invention being by suitable bolts c.

Fig. 5 shows one of the heddles d separated from the heddle frame, said heddle being flat for its whole length and width, and having preferably a round central warp thread receiving eye 2, and, as herein represented, said heddle has long slots 3 and et at its upper-and lower ends, said slots receiving through them the bars c, the slots being preferably longer than the bars are wide, so as to let the heddles have a movement vertically independently of the vertical movement of the heddle frame and bars.

The upper bars a of the heddle frames are connected by suitable straps 0.4, a5, with pulleys a mounted in a suitable stand ci?, while the lower bars a of the heddle frames are connected by suitable straps as and a", with the levers am, 0.12, pivoted ata13 on a cross girt of the loom frame, said levers each having preferably a suitable roller which is acted upon by a suitable cam as al, a, carried by the cross shaft A3 before referred to. These cams, levers, straps and pulley are and may be all as usual in looms for weaving cotton cloth.

I have shown the loom frame as provided with guides e, extended from one to the other side of the loom, the harness frames bearing against said guides during their vertical movement, said guides steadying the harness frames especially when the vibrator or feeler to be described acts upon a dropped heddle. These guides are notched as shown, to act in engaging a dropped heddle to better advantage so as t0 prevent its twisting when being acted on by the vibrator.

The loom frame has suitable bearings for a rocker shaft f provided with suitable vibrators or feelers composed essentially of barsf, adapted to be moved in a direction parallel to the length of the warp threads, and shown as sustained entirely independently of the harness-frames, there being two such bars shown in this my present invention, said bars being carried by armsf2 connected with said rock-shaft, said bars being preferably notched or toothed at their acting edges as best represented in Fig. 6, said teeth by embracing IOO the edges of the heddles obviating twisting the same out of proper position or obvi'ating throwing the heddles laterally outv of place on their carrying bars.

The rock-shaftf, see Figs-1, 2 and 3, has fast upon it just outside the loom frame a controller lever g having a toe g', a heel g2 eX- tended inwardly from one side of it, as represented by dotted lines in Figs. 2 and 9, and in full lines Fig. 3, and a pin or projection g3, a spiral spring g4 operatively connected to one arm of said controllerlever acting normally to keep the toe g of the said lever in contact with the cam G fast on the shaft A3, said cam having extended from its rear side suitable pins or projections as h, said projections in the rotation of the said cam being adapted when` the loom is working properly and the warpsare unbroken, to pass under the elevated end, see Fig. 9, ot' the connecting rod h attached to the shipper handle A6, the said rod at such time resting upon the heel g2 referred to and between it and the said pin g3, as best represented in Fig. 9, butin case a heddle drops into the position shown by one of the heddles in Fig. 1,-t-he warp thread then in the lower plane of the shed and which should then support said heddle having been broken-, the feeler will strike said heddle and will prevent the toe ofthe controller le ver `from going back to the cam, and in such position of the controller lever, the end of the rod h will be in the path of movement of one of the projections h, as in Fig. 2, so that said .projection in the further movement of the cam will disengage the shipper handle from the notch in the usual holding plate and will permit said released shipper handle to operate in the usual manner through usual devices to cause the belt shipper or other equivalent device used, to pass the belt from the fast onto the loose pulley, thus stopping the loom. The lay` has a reed r of usual construction.

I-Iaving described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A heddle frame provided with a cross-bar and a series of metallic heddles adapted to move independently of said bar, and having also each an eye for the reception of a warp thread, combined with a roll or rod extended across the loom under the warp, said roll or rod supporting the warp threads brought to the lower plane of the shed in adetinite hori- Zontal plane, thus insuring the retention at a definite point of the lower ends of those heddles which rest by their weight on the warp threads in the lower plane of the shed during the insertion ot' the filling, substantially as described.

2. Aheddle-frame provided with a cross-bar and a series of metallicheddles adapted to move independently of said bar, said heddles having each an eye to receive a warp thread, combined with two rolls or rods extending across the loom under the warp, one of said rolls or rods being in front and the other behind the vertical planes in which saidheddles move, said rolls or rods supporting the warpthreads entering into the lower plane ot' the shed thereby enabling said threads in turn to uniformly support the heddles controlling the warp threads in the lower plane of the shed, and a stop-motion mechanism co-operating with any heddle which is dropped by reason of the breakage of the thread which should sustain it, substantially as described.

3. A heddle-frame having a horizontal bar, a series of metallic heddles having elongated slots and strung thereon and having thread holes, lcombined with a vibrator having notches to engage the edge of the heddle when dropped, and means to move said vibrator back and forth in the direction of the length of the warp, and a notched guide, as e, to receive the edge of the dropped heddle, substan` tially as described.

4. A heddle frame having a transverse bar, a series of flat metallic heddles having elongated slots and strung loosely on said bar and adapted to be moved vertically thereon independently of the movement ot' said bar, a vibrator supported independently of said frame, and a shipper handle, combined with a controller lever, devices to connect said vibrator with said controller lever, devices to actuate said controller lever, and a connection between said controller lever and said shipper handle, to operate, substantially as described.

5. In a loom the following instru mentalities, Vizz-a shipper handle; a heddle frame having a transverse bar; a series of flat metallic heddles having elongated slots and mounted loosely on said bar and adapted to move vertically thereon independently of the movement of the heddle frame; a series of guides, as e, for the loweredges of said heddles located below said heddle frame; a vibrator to engage the edge of said heddles when dropped; devices to move said vibrator back and forth in the direction` of the length of the warp, combined with a controller lever; devices to actuate it; and a connection between said conv troller lever and said shipper handle, substantially as described.

6. In a loom the following instrumentalities, viz:--a heddle frame having a bar; a series of metallic heddles supported upon said bar and adapted to be moved vertically independently of the position of said bar, combined with a vibrator supported independently of the heddle frame and adapted to engage the end of the heddle when dropped, and means to move said vibrator back and forth in the direction of the length of the warp, substantially as described.

7. In a loom, a harness frame having a crossbar, a series of heddles having each a thread eye and an elongated slot near its end to embrace and be slid vertically on said bar, combined with a notched guide-bar to receive and guide the lower ends of the heddles controlling the warp threads moved into the lower IOO 1o warp threads, and a guide for the same below the plane of the warp, combined with a vibrator having a notched edge, and with devices to move said vibrator back and forth in the direction of the length of the Warp, substantially as described.

In testimony whereof I hm'e signed my name to this specification in the presence of two subscribing witnesses.

CHARLES F. ROYER.

Witnesses:

E. D. BANoRoFr, H. F. SEARLEs.

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