US673824A - Warp stop-motion for looms. - Google Patents

Description

' Patented May 7,1901.

2 Shnot--Shee I.

E. s. STIMPsoN, "wAP sToP manon Fon Looms.

(Applicntion led Nov. 30, 1900.)

(No Modal.)

Zfes, ffm@ @faam No. 673,824. Patented may 7, 19m.

E. s. sTmPsoN. f

vWARP STOP MTION FR LOMS.

(Application led Nov. 30, 1900.) (no Model.) 2 sheets-sheet 2.

Illllll i limitan Starts Partnr Ormes.

EDWARD S. STIMISON, OF IIOPEDAIE, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY, OF SAME PLACE AND PORTLAND,` MAINE.

WARP STOP-MOTION FOR LOOVIS.`

SPECIFICATION forming part Of Letters Patent N O. 673,824, dated May 7, 1901.

Application led November 30,1900. Serial No. 38.092. (No model n To a/ZZ whom t may concern,.-

Be it known that I, EDWARD S. STIMPsoN, a citizen of the United States; and aresident of Hopedale, county of Worcester, and 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 specication, like characters on the drawings representing like parts.

This invention has for its object the production of novel warp-stopmotion mechanism particularly adapted for use in connection with looms for weaving, wherein the detectors are normally supported in inoperative position by the warp-thread between the leaserods, a series of detectors cooperating with each of the divisions of the warp-threads, and in the present embodiment of my invention I have shown two series or banks of detectors oppositely arranged and adapted to cooperate with a common and normally-vibrating feeler, engagement'of the feeler with areleased detector of either series being made operative to effect the stoppage of the loom automatically. In order to reduce the friction on the warp-threads, I have arranged the lease-rods in such a manner that they are freely rotatable, and the bearin gs or supports for the lease-rods are arranged to be lubricated, novel and simple means being provided to prevent the escape of lubricant from such supports or bearings to the exterior of the lease-rods and thence to the warp-threads.

Various novel features of myinvention will be hereinafter described in the specification, and particularly pointed out in the claims.

Figure l is a transverse sectional View of a portion of a loom with one practical embodiment of my invention applied thereto, taken on the line .fc Fig. 2, looking toward the left. Fig. 2 is a rear elevation of the mechanism shown in Fig. l, the whip-roll and warpbeam being omitted to more clearly show the novel mechanism. Fig. 3 is an enlarged detail, in transverse section, of a part of the mechanism shown in Fig. l, but showing a detector in abnormal position and about to cooperate with the feeler. Fig. 4 is an enlarged longitudinal sectional detail of one of the lease-rod supports or bearings, the adjacent end of the lease-rod, and the device for preventing escape of lubricant from the sup. port or bearing; and Fig. 5 is a top or plan view of a portion of the vibrat-ing mechanism for operating the feeler and for effecting the operation of the stopping means.

The loom-frame A, lay A3, harnesses H, Whip-roll W, and cam-shaft O may be and are of usual or well-known construction, the loom being provided with stopping means, the only portion thereof which is herein shown being the shipper-lever S, which is held in running position in the usual notched holding-plate NX, Fig. 2. On the inner face of each loom side is rigidly attached an arm a, having its upper end iiattened to support a substantially horizontal shelf a', on which rest horizontally-extended ears bx on upright brackets B, it being understood that one of these brackets is located adjacent each loom side and held in position upon the adjacent shelf d by a suitable bolt ax. Each bracket is provided at or near its top with two bosses b, each adapted to receive an inwardly-extended stud b, shown in Fig. 4.- as shouldered at b2 and held longitudinally in place by suitable set-screw 2. The inner smaller portion of each stud has rotatably mounted upon it a sleeve c, the outer side of which abuts against the shoulder b2 and against the inner face of the bracket B, the sleeve at its outer side having an external annular liange 0X, which is overturned, as clearly shown in Fig. 4, to overhang the joint between the outer end of the sleeve and the bracket, the external diameter of the sleeve being such as to receive snugly upon it the hollow end of one of the lease-rods L, and preferably the leaserods are made as hollow metal tubes having sufficient rigidity to properly support the warp-threads, the mounting of the rods as described permitting their free rotation with the sleeves c upon the supporting-studs b'.

The supporting-studs b may be lubricated in any suitable manner, and in order to prevent the escape of the lubricant to the external surface of the lease-rods and thence to the warp-threads I have provided the annular overturned flange cX on each of the sleeves c, this flange serving to collect and retain any oil which may Work out from the bearing and IOO effectually preventing it from passing to the lease-rod. This device is shown, but not described in detail nor claimed, in another application, Serial No. 38,093, filed contemporaneously herewith. l Each bracket is provided with two vertical recesses b3, located below and between the lease-rods, to receive transverse supporting-bars dx, which extend from one to the other bracket across the loom and on which bars the detectors are strung, the bars being held in place by a pin b4, passed th rough the bracket and intersecting the slots below the bars.

The detectors ci, are preferably made of round wire bent into substantially hair-pin shape and with one of the legs prolonged, as at d', this prolongation being left round,while the remainder of the detectors are tiatten ed in order to take up less space. The detectors straddle the bars dx and are freely movable vertically relatively thereto,the said detectors being strung on the warp-threads between the lease-rods, as clearly shown in Fig. 3. There is little or no vibration of the warpthreads at these points, and therefore the detectors have no tendency to jump or iiy out of place, and in their normal inoperative position the detectors are held with their lower ends out of range of a feeler, to be described.

The brackets B are provided with seats b5 for cross-bars B', which extend from one to the other bracket, two of such cross-bars being used, as herein shown, and rigidly secured to the brackets by a bolt B2, (see Figs. 2 and 3,) the crossbars being made heavy and strong to form a rigid connection between the brackets. The inner faces of the cross-bars are cut away to leave a longitudinally-extended lip or shoulder 4 outside of the path taken by the long leg of a detector when released by breakage of its warp-thread and serving to support the detector against the thrust of the feeler.

A bridge comprising upright end pieces BS and cross-bars B4 is inserted between the two brackets B below the bars B' and held in place bya rock-shaft F, which extends through the end pieces b3 and the lower adjacent portion 5 of the brackets, the tops of the end pieces Bs abutting against shoulders 6 on the brackets, as best shown in Figs. 2 and 3.

The bridge-'bars B4 are so located when in position as to leave a clearance-space between their inner edges 7 and the longitudinal ribs or edges 4 of the bars B', and normally the feelerfvibrates in and out of the spaces thus presented. The feeler is shown as a metal plate slightly curved transversely (see Fig. 3) and mounted on arms f', rigidly secured to the rock-shaft F, the feeler in its vibration moving below the lower ends of the detectors without interference therewith. Should a Warp-thread break, its detector will descend into the position shown by the detector d, Fig. 3,with its prolongation d' extended across the space between the edge 7 of the bridgebar B4 and the edge 4 of the cross-bar B' and in the path of the feeler, engagement of the latter with the released detector operating to arrest the movement of the feeler, such arrest operating, through means to be described, t0 effect the operation of the stopping means for the loom.

The cam-shaft C has fast thereupon a feeler-actuating cam C, the periphery of which is engaged by a follower h, fast on a rock-shaft hx, mounted in a yoke m, secured to or forming part of a link M, hooked at its upper end, as at m', to embrace the cam-shaft CX, a spring SX (see Fig. 2) surrounding the shaft hX and being secured at one end to the yoke and at the other to a collar 8, fast on the rock-shaft, the winding of the spring being such as to normally press the follower h against the periphery of the cam-shaft C. The follower is rearward ly extended from the rock-shaft to form an arm h', which is connected by a link h2 with a rocker-arm f2, loose on the rock-shaft F, and an oppositely-extended rocker-arm f3, fast on said shaft, is connected by a link h3 with a rearwardly-extended arm h4, loosely mounted on the rockshaft hX and provided with a forwardly-extended bunter h5, (see Fig. 5,) which is at times adapted to be engaged by a tappet t, rotatable with the shaft CX for a purpose to be described. A second' tappet t', also rotatable with the shaft CX and substantially diametrically opposite the tappet t, is adapted to at times engage a bunter h6, mounted on the rock-shaft hx and rigidly held in position thereon by a suitable set-screw 9. The arm f3 is provided with a lug 30, (see Fig. 2 anddotted lines, Fig. 3,) against which a lug 4:0 on the arm f2 is normally held by a spring S6, (see Fig. 2,) one end of the spring'being secured to the arm f2 and the other end to the adjacent end piece B3 of the bridge, the winding of the spring being such as to normally keep the two lugs together and to effect rocking of the shaft F when the arm F2 is oscillated. As the cam Cis rotated it will act upon the follower h to rock the latter and through the link h2 to rock the shaft F, so that the feeler f will be vibrated back and forth below the back-stop bars B', and through the link h3 the rock-shaft hX will be oscillated, but in a direction opposite to that of the shaft F, and the hunters h5 and 71,6 will be moved out of the paths of their respective tappets t' If, however, a detector is released, as by the breakage of its warp-thread, (see Fig. 3,) its longer leg or prolongation will move down into the path of the feeler, arresting the movement of the latter, and one or the other of the bunters will remain in the path of its coperating tappet, the engagement of the tappet and bunt'er moving the bunter to the left viewing Fig. 1, and effect longitudinal movement of the link M in the direction of the arrow 20, Fig. l. If the feeler when arrested is moving toward the right,

Fig. 3, the follower h will be held stationaryl away from the low part of the cam C, inas- IOO IIO

much as a downward movement of the follower corresponds to lthe movement of the feeler to the right, Fig. 3; but ii" the feeler is arrested when moving in the opposite direction, as by the release of a detector in the rear bank or series, then the spring s6 will give as the high portion of the cam C continues to lift the follower h. With this simple construction the common follower is adapted to operate with two banks or series ot' detectors. It will be remembered, however, that it is immaterial which stroke of the feeler is arrested, as one or the other of the bunters will be engaged to move the link M longitudinally, and such movement of the link is made effective to release the shipperlever S, and thereby stop the loom, the lower end of the link being pivotally connected at m20 to an arm m21, fast on a short shaft m22, supported in suitable bearings on the crossgirth A12 of the loom, said rock-shaft having fast upon it a knock-olif arm m23, which engages the lower end of the shipper-lever, so that when the link is moved as has been described the knock-off arm m23 will operate to release the shipper-lever from its holdingnotch in the plate NX.

My invention is not restricted to the precise details herein shown and described, as I have illustrated one practical embodiment of my invention.

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

1. A stop-motion for looms, comprisinga series of detectors in engagement with the warpthreads between the lease-rods, and normally supported by the threads in inoperative position, the lease-rods, a bar which the detectors straddle, each detector having a depending prolongation, a feeler normally vibrating below the bar and adapted to pass beneath the shorter portion of a released detector and cooperate with the prolongation thereof, and a back-rest for the prolongation when engaged by the feeler.

2. A stop-motion for looms, comprising oppositely-arranged series of bifurcated detectors in engagement with the several divisions of the warp-threads between the lease-rods and normally supported by such threads in inoperative position, each detector having a long and a short leg, a guide-bar for each series of detectors, straddled by the latter, and a common feeler normally vibrating below the detectors and adapted to cooperate with the longer leg of a released detector of either series.

3. Astop-motion for looms, comprising oppositely-arranged series of bifurcated detectors in engagement with the several divisions of the warp-threads between the lease-rods and normally supported by such threads in inoperative position, each detector having a long and a short leg, a guide-bar for each series of detectors, straddled by the latter, a longitudinally open back-restbelow each bar, to sustain the outer side of the long leg of a released detector, and a feeler, normally vibrat-ing below the detectors into and out of the openings of the back-rests, to engage the long leg of areleased detector of either series.

4. In aloom, cylindrical,l1ollowended leaserods, a iiXed shouldered support extended into each end of a lease-rod, and a sleeve mounted loosely on each support, and fixedly embraced by the lease-rod, the sleeve having an annular, overturned flange to form a receptacle for lubricant and overhang the joint between the outer end of the sleeve and the shoulder of the adjacent support.

5. In a loom, tubular lease-rods, xed supports to enter the ends thereof, a bearingsleeve interposed between each support and the adjacent end of the lease-rod, and external means mounted on the sleeves to prevent escape of lubricant to the exterior of the lease-rods.

6. In a loom, two rotatably-mounted leaserods, opposed series or banks of bifurcated warp-stopmotion detectors in engagement with two divisions of the warp-threads, respectively, between the lease-rods, each detector lhaving a short leg, and at its outer side a long leg, and normally maintained in inoperative position by the cooperating warpthread, and a double-edged normally-vibrating feeler located below the series of detectors and adapted to pass under the short leg and cooperate with the long leg of a released detector of either series.

7. In a loom, a pair of upright brackets each having on its inner face supporting studs and seats, detector-bars supported by the brackets, lease-rods rotatably mounted on the supporting-studs, transverse back-stop bars seated on the brackets and rigidly secured thereto, and a bridge interposed between and connected with the brackets below thebackstop bars, said bridge having bearings for a feeler rock-shaft and transverse connectingbars.

8. In a loom, an upright bracket connected with each loom side, a bridge rigidly connecting the lower portions of the brackets, leaserods mounted on the brackets, series of detector-supporting bars connecting the latter below and between the lease-rods, warp-stopmotion detectors mounted on the bars and adapted to engage the warp-threads between the lease-rods, and a vibratable feeler mounted in the bridge and brackets.

9. In a loom, stopping means, controllingdetectors normally held inoperative by the warp-threads, a feeler to cooperate with a released detector, and means to vibrate the feeler, combined with a longitudinally-movable link, to eftect the actuation of the stopping means, an operating-cam therefor, a bunter mounted on the link, and means operative upon engagement of the feeler with a released detector to positively move the IOO lIO

IZO

bunter into position to be engaged by the cam and effect longitudinal movement of the link.

10. In a loom, stop-motion detectors controlled by the Warp-threads, a vibratable feeler to engage and be stopped by a released detector, means to vibrate the feeler, including a rock-shaft mounted on a link and having a rocker-arm operatively connected with and to move the feeler, an actuating-cam, and a spring-controlled follower connected With the rock-shaft, combined with stopping means, a link-operating cam, a bunter carried by the link and adapted to be at times engaged by the cam, and means operative upon enl5 gagement of the feeler With a released detector to effect coperation of the bunter and the link-operating cam.

In testimony whereof I have signed my name to this specification in the presence of zo two subscribing Witnesses.

EDWARD s. STIMPsoN.

Witnesses:

GEORGE OTIs DRAPER, ERNEST W. Woon.

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