US515536A - Warp stop-motion for looms - Google Patents

Description

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v 0. SMITH. WARP STOP MOTION FOR LOOMS.

No. 515,555. 7 Patented Pb. 27, 15.94,

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No. 515,636. Patented Feb. 27, 1894.

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0. SMITH. WARP STOP MOTION FOR LUOMfi.

Patented Feb. 27, 1894.

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DEER-LIN SMITH, OF BRIDGETON, NEWV JERSEY, ASSIGNOR OF ONE-HALF TO GEORGE DRAPER 8: SONS, OF I-IOPEDALE, MASSACHUSETTS.

WARP STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 515,536, dated February 27, 1894.

Application filed June 12, 1893.

To all whom it may concern.-

Be it known. that I, OBERLIN SMITH, of Bridgeton, county of Cumlierland, State of New Jersey, have invented an Improvement in Warp Step-Motions for Looms, of which the following description, in connection with the accompanying drawings, is a specificalion, like letters on the drawings representin g like parts.

This invention relates to warp stop motions for looms, in which the breakage or slackening of a warp thread is detected by the difference in tension upon the heddle through which it passes.

The object of this invention is to provide simple and. reliable mechanism by which the loom may be stopped when the tension of any particular warp thread or threads upon its heddle or heddies is not as great as it should be.

In carrying out this invention 1 provide a series of heddle heads, which, when thread heddles are used, are formed independently of the heddles and movedthereby, but which when wire heddles are used are formed preferably by the ends of the heddles themselves, which heads are moved at each formation of a shed by the tension of the warp threads when moved by said heddles into one or the 0 other plane of that shed. Each heddle frame is provided with a feeler which is moved toward and from the heddle heads of that frame, the range of movement of such feelers being varied by the positions of the heddleheads. (lo-operating with the several independent feelers on the respective heddle frames, and constituting one of the principal features of this invention, is a single masterfeeler which stands at the end of the loom and co-operates with the feelers on the beddle-frames, which thereby control the movements of the master feeler at the end of the loom, the latter controlling the stop-motion. In the preferred construction I have also pro- 5 vided a suitable connection moved or controlled by this master feeler at the proper time, and interposed between a lug on the weft or other slidebar which actuates the stop-motion, and a moving part of the loom, whereby the said moving part through said Serial No. 477,342. (No model.)

connection moves the lug and stops the loom without throwing any stresses or work of any sort upon the more delicate parts of the stopmotion.

Other features of this invention will be hereinafter more fully set forth in the specification and claims.

Figure 1 of the drawings represents in vertical cross section, a loom equipped with a stop-motion embodying this invention; Fig. 2, a section on an enlarged scale of the essential working parts of Fig. 1; Fig. 3, a partial face view looking from the left of the parts shown in Fig. 2; Figs. 4 and 5 similar views to Figs. 2 and 3, but showing the parts in difierent position, or in the positions they will assume when stopping the loom; Figs. 6,

7 and 8, enlarged sectional details of parts of a heddle frame showing the co-operative movement of one of the auxiliary feelers with the heddle-heads; Fig. 9, a detail showing the manner of actuating an auxiliary feeler; Fig. 10, a sectional detail illustratinga modified construction to be described; Fig. 11, a cross sectional detail of the swinginglever o, 5 showing its forked or recessed end to be described and Fig. 12, a detail showing a modification of heddle head to be described.

Referring to the drawings, A represents a portion of the end frame of a loom; B the Sc lay or crank-shaft; G the lay; O the laysword operated from said shaft; 0 the breastbeam; (3 a weft-fork; C a weft-slide bar; C a weft-hammer; O a cam on the shaft C to actuate the said weft-hammer; f a rock-shaft having an arm f adapted to be engaged and moved by the weft slide-bar O and an arm f adapted to push the shipper, not shown, from its notch and effect the stopping of the loom, all of which are and may be of any well no known or desired construction and arrangement, actuated in usual manner, and need not therefore be herein further described either as to their construction or operation.

D, D, represent the heddle frames or car-* 5 ricrs for the heddles through which the warp threads are passed, which heddles, so far as this invention is concerned, may be of either thread or wire, or in fact of any other suitable or desired form.

I have, however, in the 00 principal figures of the drawings, elected to illustrate my invention as used in connection with the usual thread heddles.

Referring to Figs. 2 and 3, the heddle frames D, D, consist of upper and lower frame bars d, 61', together with an intermediate bar 61* located parallel with and near to the upper frame bar cl. The thread heddles it having eyes h, through which the warp threads 10 are passed, are, at their lower ends, passed about or otherwise secured to the lower frame bars d of the heddle frames, and at their upper ends said heddles are attached or hooked to the lower ends of the pins 6, see Figs. 2, 6 and 8, fitted to slide vertically in the intermediate bars cl" of the heddle frames, the said pins at their upper ends being provided with heads 6 which constitute one form of heddle-heads connected with the heddles and moved by the varying tension of the warp threads thereupon.

Referring to Fig.8, the springs a surrounding the pins e, and acting at their upper ends against the heads e thereof, act to move the heads normally into their elevated positions thereby maintaining the 'heddles taut.

Each heddle frame is provided, as shown best in Figs. 6 to 8, with a feeler'm, hereinafter termed an auxiliary feeler, to distinguish it from a master feeler to be described, said auxiliary feeler being pivoted at its ends in the Vertical end bars of the frame, and is adapted to be moved about itsaxis,and caused to sweep across the paths of movement of the heddle heads of that frame, clearing the said heads when the latter are drawn down into their lowermost positions, as in Fig. 6, but encountering and being stopped by any one of said heads permitted to remain in its elevated position, as shown in Figs.7 and 8. Each auxiliary feeler m has secured toits pivotat one end of and outside its frame, an arm m, see Fig. 9. which preferably extends in a direction substantially at right angles to the feeler, said arm in the present construction in turn having a finger m leading from it at right angles or in a direction substantially parallel with the feeler m, said arm m at its outer end having an eye through which is passed the end of a feeler actuating rod m extended downwardly, as shown in Fig. 5, and at its lower end secured to some fixed support, as, for instance, the frame of the loom, a spring m being interposed in and preferably forming a part of this actuating rod m From this it will be seen that whenever a heddleframe is raised, carrying with it the feelerm, the actuator m attached to a fixed support at its lower end will act to pull the arm m down,and thereby turn the feeler on its pivot and cause it to sweep across the paths of movement of the heddle-headsin that frame, the spring m interposed in the actuator permitting-the heddle frame to be at all times raised whether or not the feeler is permitted to partake of its full movement. A spring m also attached to the outer end of the arm m, and at its upper end to the heddle frame, serves to return the feeler to its normal posithan upon the descent of the heddleframe.

By reference to Figs. 6, 7, and 8, it will be seen that the finger m stands in a vertical position only, when the feeler is in its position, Fig. 6, it having been moved through the entire range of its movement, and that whenever the feeler is stopped by either of the heddle-heads it leaves the said finger in an angular position, as shown in either Fig. 7 or Fig. 8.

Referring particularly to Figs. 1 to 5, N represents what 1 term a master-feeler, the same being arranged in a position substantially at right angles to the auxiliary feelers m, and journaled at its ends in suitable bearings 72 carried by one of the end frames of the loom, said master feel'er, opposite the ends of the heddle frames, having the depending plate portion n in which are out several vertical slots 01 there being a slot for each heddle frame, said slots being located in such positions with relation to the said heddle frames and the fingers m mounted thereon, that when the said fingers stand in substantially vertical positions, as in Fig. 6, the said masterfeeler may be swung on its pivots toward the ends of the heddle frames, the fingers passing through the vertical slots m in the said master feeler, but when the said fingers are in their positions Figs. 7 and 8, they cannot enter said slots and will therefore interrupt and stop the movement of the master-feelen The master feeler is moved by oppositely extended arms n 71 see Figs. 3 and 5, to which are connected the actuating rods n a leading downwardly and connected with the ends of the oppositely extended arms 71", a see Fig. 1, on the lower pivoted end of the lay sword, so that when the latter is rocked to carry the lay forward and back the movements of the arms n 91 will act through the rods n n", to communicate a rocking movement to the master feeler, causing the latter to move toward and from the heddle frames at each pick. The actuating rods, as herein shown, have interposed between their ends, springs at, n which yield when the master feeler encounters and is stopped by one of the fingers m or otherwise. To the forward end of the master feeler N is pivoted at 0 the swing-bar 0', counter-weighted at 0 and maintained thereby in a normal inclined position, Fig. 2, against the pin 0 on the feeler. This swing-bar is rocked back and forth with the master feeler from its full to its dotted line position Fig. 3 at each pick.

Referring particularly to Fig. 2, 0 is a lug standing vertically from the weft slide 0 and o is an arm projecting forward from the end rail upon the lay and movable therewith, said arm having, as shown, an upturned end 0 In the normal operation of the mechanism the full, unobstructed movement of the master feeler carries the swing lever 0 always into one or the other of its extreme positions,

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Fig. 3, clearing in its movement the arm which latter is not of. sufficient length to reach the lug 0 when the lay reaches the end of its forward movement. hen, however, the master feeler is obstructed in its movement, and is stopped after having begun such movement, it leaves the swing-lever midway between its two extreme positions, or in a substantially vertical position, Fig. 5, where it is retained frictionally by the spring n said lever in its intermediate vertical position being interposed between the upturned end 0 i of the arm 0 on the lay and the lug 0 on the weft slide, so that when the lay approaches the end of its forward or beating-in movement the said arm 0 will encounter the lower end of the swing-lever o and through said lever will push the lug o and the weft slide 0 forward to efiect thestopping of the loom. The rods n n, are, as before stated, connected at their lower ends with the arms n 72- on the lay swords by chains or other flexihis or suitable connections which provide a lost movement, whereby the master feeler is moved only at the last end of each forward and back movement of the lay.

The operation of my improved stop-motion may be briefly described as follows, vizz-So long as the wrap-threads remain unbroken and taut they will, when moved into the upper plane of the shed, exert apull ortension upon the heddles which raise them, and will thereby A draw said heddles and'the pins or heads 6 connected thereto down into their lowermost positions, as in Figs. 2, 3, and 6, so that the auxiliary feeler m of the heddle frame, which is raised, may have an unobstructed and free movement across the paths of movement of the said heads to thereby be turned to bring the finger m on its arm m into a substantially vertical position, Figs. 6 and 9. This is done just before the lay reaches the end of its backward movement, at which time the master feeler N, rocked by the actuating rods 01?, n is moved on itspivots inwardly or toward the ends of the said heddle frames and the fingers thereon. The fingers on the raised heddle-frames standing in substantially vertical position by reason of the full movement of the auxiliary feeler described, permit said master feeler to have a full movement passing the fingers m the latter passing through the slots n in the master feeler, such movement of the master feeler carrying the swing lever 0' to the right, as in Fig. 3, into its dot-- ted position beyond or out of the line of movement of the arm 0 on the lay, so that as the latter approaches and reaches the end of its forward movement the upturned end of said arm will fall short of the log 0 on the weft slide and will fail to move the same, thereby permitting continued operation of the loom. If one of the warp-threads becomes broken or unduly slack it will fail to exert the proper tension upon the heddle which moves it and will permit said heddle to be retained taut by the action of the spring e against the heddle-head keeping the said head in its raised normal position, as in Figs. 7 and 8. With the heddle-head in this position the movement of the auxiliary feeler on that bed die-frame is obstructed and stopped, leaving the finger m on its arm on in such an inclined position, as shown in Fig. 7 or Fig. 8, that it will not pass through its slot in the master feeler when the latter is moved toward it, the said finger when in such position stopping the master feeler midway the movement of the latter, after it has moved the swing-lever 0' into a substantially vertical position, as in Fig. 5, directly in the line of movement of the arm 0 on the lay. In its next succeeding forward or beating-in movement of the lay the end 0 of the arm 0 will strike theswing lever 01, interposed between it and the lug 0*, and will push the said lever before it against and thereby moving the lug and the weft slide to effect the stopping of the loom, the said swing-lever turning on its pivot 0 to permit such movement, it being immediately returned to its position Fig. 2 upon the return movement of the master feeler. The lower end of the swing-lever 0', see Fig. 11, is formed at its front side adjacent the log 0 to present a concavity or recess, which when the lower end of the said -lever is in contact with the said lug prevents the said lever being moved laterally away from the lug. This is necessary for the following reason, viz:The master-feeler is, owing to the lost motion or slack in the rods a n, moved only at the latter parts or ends of the forward or back movements of the lay. With this in mind, if the swinging lever has been stopped in its intermediate position by reason of a broken or slack warp-thread, as described, the arm 0 will strike it as the lay approaches the end of its forward movement and will tend to push the same against and to move the log 0 to stop the loom, but as the master feeler is normally moved at or near the end of the inward movement of the lay, the tendency of the rod n would be to pull the swinging lever out from between the arm 0 and the lug 0 before the slidebar had been pushed sufficiently forward to stop the loom. This is prevented, as willbe seen, by the recess 0 in the front side of the swinging lever, which prevents the latter being withdrawn from between the lug and the arm 0 so long as the said lever is maintained in contact with or against the lug. In thenormal operation of the loom the swinging lever o swings over and clears the arm 0 behind the upturned end 0. For eonvenience in manufacture the heddle-heads e are staggered in the bar d in order to make them as large as possible without requiring an undue amount of room.

The swing lever 0' constitutes a connection, interposed at times between the movable lug 0" which effects the stopping of the loom and the lay, a moving part of the loom.

In Fig. 10 I have shown one adaptationof y the heddles themselves, as shown in Fig. 12.

7 As manyheddle-frames as'desired may be employed, for whatever be the number, a single masterfeeler is sufficient, it being neces- I sary only that said master feeler be provided with as many vertical slots n as there are I heddle-frames; and it matters not how many of these heddle-frames be raised at once, for all or a part only may be raised and operate equally as well. 7 I I The term heddle-heads, asemployed in I the claim s,includesany heads either indethe warp threads passedthrough the heddles.

This invention is not limited to the particular construction or parts herein shown, for I the construction shown issimply one embodiment of this invention and such construction may be varied in many particulars without departing from the spirit and scope of the invention.

I claim- 1. Awarp-stop motionfor looms containing the following instrumentalities, viz;-a hed dleframe, a series of heddles carriedthereby, and, heads connected with the, said heddles and adapted to be moved by the varying tension of the warp threads therein, a feeler movable toward and from said heads,a co-operating master feeler, and a stopping mechanism controlled thereby, substantiallyas described.

2. A warp-stop motion for looms containing the following instrumentalities, viz; -a heddle-frame, aseries of heddles carried thereby, heads connected with said heddles and adapted to be moved by the varying tension of the warp threads therein,a feeler movable toward and from said heads, a co-operating master-feeler, a stopping mechanism for the loom, a movable lug to actuate the same, and a connection actuated by said master-feeler and adaptedto be at times interposed between said lug and a moving part of the loom to actuate the former by the latter, substantially as described.

3. Awarp-stop motion for looms containing the following instrumentalities, viz;a series of heddle-frames, heddles carried by each, heads moved by said heddles, and auxiliary feelers on and movable with said frames, a master-feeler co-operating with said auxiliary feelers, and a stopping mechanism for the loom controlled by said master-feeler, substantially as described.

4. A warp-stop motion for looms containing the following instrumentalit-ies, viz;-a series of heddle-frames, heddles carried thereby, and heads connected with and moved by said heddles, a feeler on each of said heddle frames, a finger moved into different positions by said feeler, a master-feeler having heads connected with and moved by said heddles; an auxiliary feeler on each ofsaid frames; fingers on and movable by said auxiliary feelers; a master-feeler, having openings therein to co-operate with said fingers; a stopping mechanism; a movable lug controllingthesame and a movable connection on sa'idmaster-feeler, and adapted to be moved intoposition between said lugand a moving 7 part of the loom whereby said lug is'a'ctupart of'the loom, subated by said moving stantially as described.

,6. Awarp-stop motion for looms containing the following instrnmentalities, viz;'a lied die-frame; heddles carried thereby; heads connected with and moved by said heddles; a co-ope'rating pivoted feeler adapted to be swung toward and from said heads; and stopping mechanism for the loom controlled by scribed.

7. A warp-stop motion for looms containing the following instrumentalities, viz;-'a series of heddle-frames; heddles carried thereby; heads connected with and moved by said heddles; auxiliary feelers on said heddle frames respectively; a lay and a master-feeler actuated therefrom and co-operating with said auxiliary feelers; and stopping mechanism for the loom controlled by said master-feeler, substantially as described.

8. A Warp-stop motion for looms containing the following instrumentalities, Viz;a series of heddle-frames; heddles carried thereby; and heads moved by said heddles; a feeler; and an actuator therefor connected with a fixed support whereby movement of the said heddle-frame with relation to said support causes movement of said feeler, substantially as described.

9. A warp-stop motion for looms containing the following instrumentalities, viz ;a series of heddle-frames; heddles carried thereby;

movements of said feeler, substantially as de heads connected with and moved by said heddles; a feeler and a yielding actuator connecting the same with a fixed support whereby said feeler is moved by movement of said heddle-frame with relation to said support, said actuator yielding when movem ent of the feeler is obstructed, substantially as described.

10. A warp-stop motion for looms containing the following instrumentalities, viz ;a series of heddle frames; heddles carried thereby; heads connected with and moved by said heddles; a feeler on each heddle frame and means to move the same; a co-operatingmaster-feeler on the loom-frame; an actuator for the same connected with and moved by the lay; and a spring interposed in said actuator; substantially as and for the purpose specified.

11. A warp-stop motion for looms containing the following instrumentalities, viz';a series of heddle-frames; heddles carried thereby, and heads connected with and moved by said heddles a feeler on each of said heddle-frames movable toward and from the heddle heads of their respective frames, a co-operating master-feeler, rods connecting the same with and to be actuated by the lay and to provide a lost motion whereby the feeler is moved only at or near the ends of the forward or back movement of the lay; stopping mechanism forthe loom; a. movable log to actuate the same; and a connection actuated by said master-feeler and adapted to be at times interposed between said lug and a moving part of the loom to actuate the former by the latter,

substantially as described.

12.- A warp stop motion for looms containing the following-instrnmentalities, viz;a series of heddleframes, heddles carried thereby; heads connected with and moved by said heddles; an auxiliaryfeeler on each of said frames; fingers on and movable by said auxiliary feelers; a mastenfeeler, openings therein to cooperate with said fingers; a stopping mechanism; a movable lug controlling the same; a movable connection on said master feeler adapted to be moved into position between said lug and a moving part of the loom whereby said lug is actuated by said moving part of the loom; and a friction device for and to retain the said master-feeler and its connec tion in its diiferent positions, substantially as described.

13. A warp stop-motion for looms containing the following instrumentalities, viz ;a series of heddle -frames, heddles carried thereby; heads connected with and moved by said heddles an auxiliaryt'eeleron eachof said frames fingers on and movable by said auxiliary feelers; a master-feeler, openings therein to cooperate With said fingers; a stopping mechanism; a movable lug controlling the same; and a movable connection 0 on said master-feeler and provided with a recess o at its front side,

a the said connection being adapted to be moved into position between said lug and a moving part of the loom whereby said lug is actuated by said moving part of the loom, substantially as described.

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

OBERLIN SMITH.

Witnesses:

HUGH L. REEVES, RoBT. S. SCHILLER.

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