US1764879A - Warp stop motion - Google Patents

Description

June 17, 1930. J, G, MENZER ET AL 17,764,879

WARP STOP MOTION Filed Jan. 27, 192e 5 sneetsl-sneet 2 Jafe June 1.7, 1930. J, Q MENZER Er AL 1,764,879

WARP STOP MOTION Filed Jan. 27, 192e 5 shts-sheet 3 Swank June 17, 1930. 1. s. MENzl-:R ET Al- WARP STOP MOTION Filed Jan. 27. 1928 5 Sheets-Sheet 4 www@ June 17, 11930. J. G. MENzl-:R ET Al. x

v wARP sToP MOTION Filed Jan. '27, 1928 B sneetssheet 5 f drops.

Patented June 17, 1930 ETE A oonronnrrcn or rfinssaonusnrrs Appnctaifm` ned January 27, Y192s'.`

The presernn.y invention relates to 'warp stop motions for looms, invention is not restricted to a specific type of stop motion, it is intended primarily for use in connection with that type wherein the harness or shed forming heddles perform the additional function of detector Wires -whichserve toV stop the loom whenever one of the `warp threads breaks or `Stop Vmotions of this type are broadly old, and are illustrated, for example, `in my Patents N os. 1,527,195 and`l,527,l96, granted ret. ai, 1925.

An object of the invention is to provide a stop motion which 1s simple 1n construction, and requires little or no adjustment throughout extended periods oi' operation, and which, because of its simplicity of construction, is accurate and positive in operation, and may be A further object of the invention is to provide a mechanism which may be readily applied to a loom, irrespective of the number of its harnesses or harness lframes.

One objection to stop motions, which includea detector element having a detecting movement'` as the harness frames rise and fall, is that it is necessary toprovide an accurate timing of the .engagement ofthe `various arts which im art the detecting' movement to the bar, so, that the bar is rocked at exactly the proper position of the `harness frame, andis released for rocking 'y movement in the reverse direction at exactly whereby the detector bar the proper point, will not be locked except by heddles which have fallen.

One object of the present invention. is to` provide alconstruction' in Which the dwell of the locking position of the detector bar is practically fixed by the moving'contact parts which move the detector barl to the locking position and' in which the contact parts are separated by othermeans than the upward movement of the harness frame so that the detector bar can move back to unlocked position when not engagedV durin its detecting movement by a fallen heddle. The present invention seeks to provide a armes and although the readily applied to a loom. i

the line 'll-A of maar PATENT terri-CE); n Josnrn e. Mensen Ann nanna n. renommer ennronn, fianssncnusnrs, ASL

s IGnons To irnounrwenn sror Morton', rno.,e.s new Bnnronn, MASSACHUSETTS, l

wenn sror Morrow serial NQ, afiegeeol y construct-ion which will operatees desired withoutl the necessity for adjusting the'parts frequently to maintain the operation of itsvarious parts.

Furthermore, the invention seeks to ac`` complish these objects with a construction which is simpler, and hence more" economical to install and operate thandeviceswhich have heretoforebeen developed. i

Theseiand other objects of asimilar nature will `become apparent as the descrip tion proceeds in connection with a preferred embodiment shownk in the accompanying drawings, wherein: Y ,i Y Figure lis a sideelevational view with the lmechanism Vshown as applied to a tw`o` harness loom, the frame and lay ofi-which areshown in dotted lines; Y y Y Y Figure 2'is a fragmentary front eleva` tional view showing the 'relation of a harness frame to the parts which `areengaged to rock the detector bar, and effect stopping' an exact timing in.

Figure 4 isa horizontalsectional view onV y.

lFigure y Figure' 4a is an elevational bottom contact taken :from theoppo'site sidej from 3. a, v f y Figu're is a horizontal sectional view on the line 5 5 of Figure. i

` Figure 5 isa front Velevational view of the` top portion of a frame with a center part broken away. Y Figure 6LL is a fragmentarysectional view showing the connectionof the contactinger to the roclring detector. i l

Figure 7 isa side or end elevational view looking toward theV right in Figure 6.

Figure 8 is an end elevational view look ing toward the lett in Figure 6. i i

Figure 9 is a Vfragmentary vertical sectional view on the line 9-9 of Figure 6.

Figure lOVis a vertical sectional viewlon" substantially lthe line L10-7100i Figure 6.

Figure l1V is an elevational view of the11 upper portion'of a-harness frame showing -view #of the i sofet"r

lheddle openin gs moved to vertically lbroadly a modified construction and a fixed Contact with which it cooperates.

Figure 12 is an end or edge elevational view looking toward the rightin Figure 11.

Figure 13 is an end elevational viewl looking toward the left kin Figure 11.

Figure la is a fragmentary elevational view taken from the opposite sideof the heddle frame" shown in Figure V11, showing the lowermost position of the contact finger.

Figure 15 is atop plan view of the top contact mechanism shown in Figure 16 is a fragmentaryview showing a modified form of means for actuating the lower' contact support.

Referring to the drawings, and more particularly to Figures 1, 2`and 3, 10 indicates diagrammatically a side frame of a loom having the usual upstanding arm 10, supporting by the straps 11, the heddle frame 12. Y` f l The heddle frames, one of which is partially illustrated in Figures 2 and 6, are of the usual rectangular upper and lower cross pieces 13 connected by vertically disposed side pieces 14, which, intermediate their ends, receive upper and lower pairs of cross bars 15.Y These cross bars are held against by means of wire'retainers having portions 15 which extend into the side pieces 1e, and ends 16 which are angularly bent and extend through transverse openings in the projecting endsV of the bars 15. In each heddle frame thereis mounted, preferably above the upper pair of cross bars 15, va pair of detector bars 17, thenumber of detector bars depending, of course, upon the number of' banksV of heddles `arranged within the frame. As shown clearly inFigure 10, each detector bar between its ends is non-circular in cross section, having longitudinally cut away portions which form a rib 18. The n 19, through which the detector bars extend, are formed topermit free rockingy movementof the bars 4*when the warp threads are unbroken, but are adapted to lock the bar against such movement whenever one of the warp threads breaks. For this purpose, the slots 19 in the heddles are reduced, as indicated at 20, to

receive the rib 18 upon the detectorV bar, and, as will be understood,

j whenever one of the warp threads breaks or drops, its heddle will also drop, causing the rib 18, which is disposed position as the detector bar is rocked, to fit within the reduced portion 2O of the heddle slot, where upon the detector bar will be held against rocking movement, and through suitable mechanism Vas the heddle frame moves, will effect stoppage of the loom.

The mechanism thus far `described is old, and is disclosed and described more fully in myv patents above referred to.

yieldingly with its rib 18 inl the Figure 2, and,

formation, havingV longitudinal movementy f The present invention relates to certain other features of related and cooperating structure which will now be described.

VEach detector bar, as is customary in structures of this character, is normally held angularly disposed position with respect to the vertical, as illustrated in Figure 10. present instance, the yielding means for retaining the detector bars in this position comprises sleeves 22 each carrying a pair of short arms 21, 21', the sleeves being fixedly secured to the kbars as by cotter pins 23. A connecting link 24 has its ends extending intc va transverse opening in hollow pins 26 rotatably mounted in and adjacent the ends 25 of arms 21 and 21. An open end of each pin is interiorlythreaded and receives a set screw 26 which is adapted to engagethe link 2e within the pin and thus retain the link in any position it is adjusted through the opening in the pin. This construction permits an adjustment of the two detector bars so that the ribs 18 thereof may be set in exactly the proper position at one extreme of their movement to align with the recess 20 in the heddles. To make this adjustment, it is simply necessary to loosen the screws 26 and then to lock the detector bars by a heddle. When locked in this positic-n, the set screws 26 will be adjusted to clamp the link 24. There is thus provided a relatively simple adjustment which may be readily made.

, A spring 27 has its upper end 28 anchored to the heddle frame and extends downwardly so that its lower end passes the inner end of one of the pins 26 and thus presses the arms 21, 21 toward the right, as viewed in Figure 8. Y

v t the opposite side of the heddle frame, one of the detector bars carries a sleeve 30, which is secured 'thereto as by means of ka pin31 (Fig. 6a) projecting through aligned openings 31 in the bar and sleeve, wherein it is retained by aspring pressed lever 29 pivoted at 29 upon the sleeve 30, the pin being attached to the lever so that when its opposite end 29 isl pressed the pin will be withdrawn from the opening in the detector bar and thus `permit the sleeve to be removed from the bar as is sometimes desirable, for instance, to remove some of the heddles 'or to add others.

The sleeve has a portion projecting beyond the end of the detector bar and which is transversely grooved to receive an engaging or contact finger 32 mounted upon a lpivot pin 33 extending transversely of the Adjacent the pivot p-in 33,'the finger is In the laterally deflected as at y34, (Fig. 7 so that the projecting portion thereof is laterally ofl'setwith respect tothe rocking axis of the detector bar 17. The finger normally tends tom abutment face38, and an inclined side 39` which permits lthe linger tol drop downwardly as soon as the ldetector bar has rocked suiiiciently to carry the portionv 3G ofthe finger from beneath the relatively narrow under-face 38. When the downwardly inclined portion 32 of the finger is lifted by `means'which will be later described, the pressure on the under-face thereof tends to rock the bar to carry the rib 18` thereof toa vertical position, this roel;- ing movement of the bar which results from pressure on the under-edge of the finger 32 being due tothe laterally offset position of the portion 32 of the linger with respect to the axis of the bar, as illustratedin Fig- Fig. G.'

`should there bea ure 7 l j Y The rocking movement of the bar carries the portion 36"of the lifted linger beneath the block 37, and thus the linger is held in the substantially horizontal position illustratedlin dotted lines 'in Figure 6. Y

`As will be understood, rocking movement ofthe `detector bar,v upon which finger 82 is`mounted,"will also rock the adjacent detector bar throughthe link connection 2d (Figure 8) and rocking movement of the two bars islimited by means of a stop pin l0 extending downwardly through the block 37 and held in position by arset screw 41. The lower end of this stop pin fits within a groovel2 in the sleeve 30, andits engagement with the end ofth'egroove upon rocking movement ofr the sleeve and detector bar prevents rocking movement beyond the dotted line'position of the finger indicated in stopmotion of this type, fallen heddlel within the frame due tok a sagging or broken warp thread, when the detector bar is rocked, the

`As in the usual l narrow portion20 of the heddle will'ireceive the rib 18 upon the detector bar and prevent the-same. from rocking in a counter-clockwise direction under the tension of spring 27 which is tensioned as the bar is rocked by upward pressure on linger 32. Gn the other hand, should there be no fallen heddle, the detector bar will be rocked in a counterclockwise direction under j the influence of serine* 27 which has been areviousl tensioned, and such rocking movement in the counter-clockwise directionwill carry the finger portion 36 from beneath the vblock 37, and permit thefinger to drop to the position illustrated in Figure 6.

Referring to' the means for imparting a member l upon a cam 59 detecting or rocking movement to the deteci preferably is independent is mounted upon theV tor bar, the saine of the harnesses and loom traine. Y v

Referring more particularly to Figures 1, 2 and 3, supporting and guide' block 43 is ixedly mountedrupona horizontally extending' rod la carried at one end by a bracket block a5, into which'the rod 44 extends, being held therein by means of a. set screw l46. rlhe block has an elongated opening l-7 therein to receive a securing bolt 48 by means of which itis fixedly attached to the loom frame 10.*`

The opposite end of the rod 4:4 extends through the block 13 which is held against movement `on the rod 49. The block 4:3 has a vertically disposed guide opening through which slidably extends a vertical rod 50, whichat its lower end, is pivotally secured by means of a pin 51 to a forked lug 52 upon a horizontal armV 53. The arm 53 extends into a block 55 and by means of a set screw the latter is pivoted tothe loom frame by j means of a bolt 54. The end ofthe arm 53 has a nger 56, the under-surface 57 of which is curved upwardly from apoint 58 spaced from its end 58.` The ar1n53 and finger rest upon and are supported by a 59, carried .by a moving part of the loom, which yin the present instance, for pur! poses of explanation only, is located'on they lay. As the pin 59 moves with theoperation of the loom lay, the arm 53, which is supported at its free end thereby, moves up` wardly and downwardly about the bolt 54.-`

as a pivot, and through the pivotal connecl tion 51 with the vertical rod 50, the latter is vertically reciprocated in the guideblock 43;'

In Figure 16, there is shown a modified arrangement for vertically reciprocating `the rod 50. Referring to Figure 16, the rod 50 is extendeddownwardly and connected to a lever 53 pivoted at 54. The lever 53 rests which is employed instead of the pin 59" illustrated in `Figure 1. The cam 59V is mounted upon a continuously driven shaft-59 which may be the cam shaft of the loom. As will be understood, rotation of shaft 59 willcause the cam 59 to raise 'and lower the lever 53 and thus actuate rod 50 in substantially the same manner as the pin59 causes the arm 53 (Figure l) to rise and fall. This construction will sometimes be found preferable, since in the vconstruction first described, the movement of the rod 50 is dependent upon movement of the lay; rlhe formation of the cam Vpermits the rod 50 and the contact 60 associated therewith to be moved than when it is goingout, which is desirable, for instance, when weaving artificial silk. `With the cam 59 it is possible to arrange for 'the position of the lower contact 60 when the lay is going-in than when it is going out.

differently when the lay is going in` prevent the contact` finger 32 from moving beneath the horizontal portion 60, and is car- -ried at the outer end of an arm The contact element is adjustable longitudinally ofthe arm, being held in any selected position by means of ka set screw 6l extending into the contact element against arm 60 which Vprojects through the contactelement. The inner end of the arm 60 is enlarged to form a pair of shoulders 62, whichr abut upstanding lugs 63 upon a supporting'collarA 64 loosely fitted on the rod 50 because of its enlarged bore 6a rand supported by a collar 65 secured to the rod 50 by set screw 65.

VThe collar 65 has a Vshaped seat 65 in its top surface (Fig. 4a) which receives a depending projection 64 on collar 64 and this supports the latter with the contact arm 60 and contact 60 for lateral movement on rod 50, the `purpose of which will be later described.

As will be observed, the arm 60 is forked (Fig. A) to straddle `the rod 50. A coil spring 66, abutting a collar 67 at its upper end, presses a washer 68 downwardly against the upper surface of the arm 60, and thus maintains the arm uponr the collar 6ft. and in substantially horizontal position. The arm 60'( Ahas a depending lug 69, which lits within a vertically disposed groove 70 in the face of the collar, and, as will be observed (Figure 2) its rear edge is spaced from the inner face of this groove so that downw rd pressure upon the contact element will, if in j excess of the tension of spring 66, depress Vso the arm and contact element until stopped by engagement of lug 69 vwithvcollar 6a. Thus the contact element serves as a yielding abutment for the finger 32 as the harness rises and falls. l Y

As above explained, the contact lelement with the supporting arm 60 are mounted on rod 50 so that a lateral movement is possible. This lateral movement is'obtained through the provision of the enlarged bore in collar 64 and the resting of the latter on collar 65 through `the V-shaped seat in the latter and the `v'shaped bearing member on the-collar 64y (Fig. lu). Obviously pressure appliedr horizontally on the end of the'contact element 60, as by engagement of the lay therewith', will swing the arm 60 and rotate collar 6i causing the V-projection 64'. thereof to ride up the side of its seat 65 at thesametime tensioning spring 66 which will return the arm and collar to their normal position when the ressure is relieved. This arrangement is desirable for various reasons, particularly in view of the fact that in many installations there is danger that the lay, as it moves toward the heddle frames will engage the end of theV contact member 60, and unand collar 64 association of less the latter yields laterally there is danger of breakage as well as the danger that the handof the operator, which frequently rests on top of the lay, will be caught between the lay and the -end of the contact element 60. y

The arm 53, upon which rod 50 and contact element are supported, as has been explained, is movably mounted, having its free end upheld by the pin 59 upon the lay.

The arm is arranged so that as the finger 3Q. upon the harness frame engages the conlowing the roclring of the detector bar, thepin 59 beings to travel from the point 58 along the upwardly inclined portion of the under surface of linger 56, and thus permitsror causes the arm 53, with its rod 5 0 and the contact element, to drop to the dotted line position illustrated in Figure 3. This floating or moving support for the contact 59, which maintains it stationary until the detector bar has been given its full rocking movement, but hastens the separation of the contact element and finger onj the detector bar by positively. moving the contact element away from the detector bar immediately following the detecting movement, insures that the detector bar will be free to return to its normal position before the harness frame has risen enough to allow the heddles to rest on the detector bar. ln constructions which have heretofore been developed, it has been customary to rely upon the upward movement of the harness frame to disengage Vthe elements which have rocked the detector bar, and in case of defective adjustment, the loom is frequently stopped, due to the fact that the separation' of the engaging elements is not sufficiently instantaneous. Moreover, in stop motions of this character, due to the the detector bar with the heddle frame, it has been found that the time of movement of thel detector barvaries due to changes of the harness frame. The harness frame is ordinarily supported on straps of flexible material and is subject to a swaying motion, the extent of which depends on how tight the straps hold the frame. The straps stretch, and as they do the frame will drop lower andv also sway. As the horizontal portion of the un-V one end of the lever link El which at harness straps lengthen, the harness frame has a longer movement, and V.thus an ever increasing pressure isexerted upon the detector bar unless some means is provided to terminate at a lined and invariable time the pressure upon the detector bar which gives it its detecting movement. ln constructions heretofore provided, thepressure has been exerted upon the detector bar until the heddle'iframe rises, but in the presentv construction, due tothe lio-ating or moving support `for the stationary contact element, the lat- L ter will relieve the detector bar of moving pressure as soon as the detecting nievement of the bar has been completed,fandV thus there is provided.' a constant or invariable movement of the` detector bar regardless of the length of movement of the heddle frame. Moreover, by providing a i floating orv moving support for the contact element, and which, as described, positively moves the contact element on the loom frame away from the bar 1n the harness following the detecting movement of the detector bar, suoli exact or nice adjustments tre UHDSCQSS ary.

lThus far there has been describedthe construction of the harness frame and the de- "tector bar, and the means for imparting to the detector bar its detecting movement.

y Reference will now be made tothe mechp anism for stopping the loom when the detector bar is locked by a fallen heddle against return movement under the influence of return spring 27 and the linger in the hori- `zontal locked position shown by the dotted lines of Figure 6.

The supporting and guide block 43 upon rod 44 receives the lower end of a vertically disposed supporting rod 7l, which is held in vertically adjusted position by means of a set screw 72. The upper end of this rod carries a pin V73, which is pivoted in the rod and carries a lever 74h, having at its outer end and positioned directly above the contact inver 32 on the harness frame a hori- `zontally disposed contact element 75 which is arranged uponan arm 7.6. `The arm 76 is pivotally carried by means Vof pin 77 at 74, which has an abutment shoulder 7S arranged to coact with the curved end 79 of arm 76 `to permit the latter to pivot laterally in ,one indicated by the arrow-80, on pin 77; L'the lateral movement is normally opposed bya spring 80 which bears against the side of arm 76. This lateral movement dof! the `contact element 7 5 and its farm 75 is provided for the same reason `as the lateral movement of the lower V,contact element,

n .namely, to avoid breakage or danger to the :operator in the event that the lay engages the end of the contact element. The rear end oi? lever 74; carries I a dependls entends votally mounted on a Vdagger 81.

althon O'h tances, while at the same time tance much greater than Vthus'caused to engage the co direction,

through a laterally projecting pin 8l piv- The daggeris pivotally mounted at 82 upon a lug 83 fixed by means oyfpa set screw 84 upon a slide rod the shipper lever `88. The dagger is normally maintained Zontal position indicated inlFig. l by means of a collar or will Abe normally out of the path of a dagger engaging memberl 89 which in the pres ent instance is located upon the ,loomV lay,

g-- obviously, any other moving supported in the positionillustrated in'` F ig.

l with its forward end out ofthe path of` the pin 89, the operation of the loom will continue. p dagger supporting collar 82 the rear end or the latter will gravitate downwardly and its forward end 82" will move upwardly into the path of the pin 89 on the loom lay,

which, upon engagement with the dagger will actuate the latter andthe slide rod 8,5

tofmove the shipper lever. nection between the link 8l ger permits the link to move The Vslip C911.- and the Vdagvariable disproviding "a constant range of movement of" the dagger. This is an important `feature lofthe :construction, since sometimes after considerable use, the heddle lframemayV lift a disthat originally contemplated, and insuch event the upper Contact, aswell as thelink `8l", will be moved distance. Due,

tion, having to the detector baijand also stop the loom uwhen the detector-bar is locked bya iallen heddle. v[This form of mechanism` is illus` L trated as applied to a'heddle having a single detector bar 90 with the usual rib `91 for engagement with the narrow` portion of the heddle slot, and mounted at its ends in the harness 4frame. A` springV 92 at Vone side of the frame tends to urge the rocking bark `ofi-ts movement, which is to one extreme ,c bv" a sto finger 9 3 `hritendins into 85", the free end of which, at 86, U is connected to an operating fork 87 for" or supported Vin the horinut 82 on link 8l so thatit it may be located'upon Y part "of the y loom. As` will be understood so long as the dagger fis:

But should thelinkSl lower its Aci to 4l4f,"t here `is n [shown a modified harness frameiconstruca slightlydifferent `form ofA mechanism for cooperating with contact ele-1 v ments which .infmart` a detecting V,movement ll Y lse

inally maintained in Vzontal position illustrated in Figures 11 and 1111 by means of a spring ,102 anchored at 103 to the harness frame, and at/i secured to `may have with a toe 106 upon the lower end of a Va groove 94 upon a collar V95 fixed to the rdetector bar, the spring 92 also extending intol the same groove. K

At the opposite side koi' theheddle frame,

the detector bar carries a collar 96, having a cam surface 97 engaging a cam 98 which is Vpivoted at 99 upon a bracket 100, the axis 99, as will be observed, extending at a right angle to the axisV about which the detector bar rocks. `The cam 98`has anoutwardly extending contactinger 101,'which is northe substantiallyv horiyger will'be raisedj as it moves downwardiy past the contact as indicated by the arrow in Figure 11, and throughengagement ot the cam 98 with cam suriace 97, will jrock the 'detector bar to` carry the rib 91 thereon into Vverticalposition to receive any heddle which fallen. As the finger 101 moves upward past the contact 160, Figure- 141, it will yield downwardly and tension spring 102 which will return it when it. has movedv pastl contact 160 to the position in Figure 11.

The collar 96'upon the rock bar, has a second cam surface 105`adapted to cooperate lever 107, which is pivoted at 108 on a bracket 109 ixedly secured to the loom lframe. A

vleaf spring 110 bearsupon a pin 111 on the lever 107, and normally urges the same to its substantially vertical position illustrated in Fig. 11, but `upon actuating of the detector bar and its collar 96, the cam surface 105 engages the toe1106 and moves the'lever outwardly away from fthe harnessframe in which Yan outwardly extending i arm 112 thereon is carriedto a position beneath a second contact element which may be ,en- ,gaged upon upward movement of the har# ness frame, asuitable contact element being shown, tor instance, VVat 7 5 in Figure 2.V As will beun'derstood, in' the event the detector bar is not locked by a Vfallen* heddle when it is rocked through the operation ot cam 9,8 and its finger 101, itfwill be returnedto its normal position by means of spring 92,

which has been tensioned through the clockwise movement of-thedetector barv (Figure 13') and at; the same time,1the lever 1075will be drawn inwardly-by leaf spring 110, which l is tensioned uponvoutwardmovement oi the lever away from the harness frame.

This'iform of construction 1s distinguished from the`Y construction illustrated in Figures 1', '2 and 3, essentially in that there are provided 'two vseparate elements, namely, the

spectively,

ytector bar, and

vno further description is necessary.

and lever 107 for engaging, re- (1)v the contact element 160 which detecting movement to the de- (2) the contact element which-is engaged to stop the loom when the detector bar is locked by a fallen heddle. Furthermore, it will be observed that these engaging elements 101 andr112 upon the harness frame, are not mounted directly upon the detector bar, as in the form previously described, but are supported upon brackets on the harness frame independently of the detector bar. Moreover, theV finger 101 .is adapted to cooperate with a fixed contact instead of the loatinglysupported contact of Figure 3.

It will `be noted that in this form, provision Vis made for quick release or quick disengagement with the Contact elements 101 andV 160 by moving the contact 101 downwardly past the iixed Contact 160 as the heddle Jframe moves. As soon as the finger 101 passes contact 160 when moving in the direction indicated by the arrow in Figure 11, the detector bar will be free to move under the in'liuence of spring 92 unless it has been locked by a fallen heddle. As the harness frame moves upwardly to carry fininger '101 Y imparts the ger 101 past contact 160 (Figure 14), the movement downwardly oi' finger 101 will not aiect, by its engagement with the contact, the detector bar, since the cam 98 is freefor outward movement away 'from the cam 96 ron the detector bar.

As this device cooperates with the remainder of the stop motion in the manner described in connection with the form of Figures 1 to 10 inclusive, it is thought that Obviously, numerous modifications may be made in the structure illustrated, and which has been described in detail, and the invention is notlimited to details of construction, but f includes all Amodifications which are within vthe spirit of the following claims.

We claim.: f

1. ln a warp stop motion for looms, and in combination with the heddle frame and its shed forming heddles, a detector bar having a detecting'movement in one direction in said frame, movable means carried Yby said frame adapted upon movement to impart a detec ing movement to said bar,

lcontact means mounted on the loom adapted to be engagedV by said first mentioned means "as the heddle trame moves downwardly and to actuate the latter whereby to give said bar rection upon disengagement ot said Contact means and said means on the loom frame, and means other than the upward movement of the harness frame permitting disengagement o said movable means andsa-id Contact `means on the loom.

beengaged by said ii'st mentioned means as the lieddle frame moves downwardly and top actuate the latter whereby to give said bar its `detecting movement, yielding means J carried on the. harness frame for automaticallymoving said bar-in the opposite direction upon disengagement of said Contact means and said means ontlie loom frame, and means `other than the upward Vmovement of the harness framepermitting disengagement of said movable means and said contact means on the loom. l

3. In a warp-stop motion for looms,` the combination with a` verticallyV and bodily movable detector bar, of means` to impartV a detecting motion to said bar as it moves vertically in one direction, and meansfor freeing" said detector bar of said lirst mentioned means by movement of the latter away from the barlsubstantially immediately following itsdetecting movement and. bef'liore the bar has moved substantially in the other vertical direction.

,1 4511i a Awarp stop motion `:for looms, the combination with a vertically and bodily movable detector bar, of means engageable to impart a detecting motion to said bar it moves verticallyfin one direction, and means independent of the loom lay for movingsaid iirst mentioned means awa-y from said detector bar substantially imniediatcly following its detecting movement and before the bar has moved substantially in the other-vertical direction.

W5. ln a warp stop motion for looms, the combination with a heddle frame having a series of heddles, of a substantially horizontallydisposed detector bar movablewith said frame and having a detecting-movement'thereon, contact mea-ns engager-ble as the heddle frame moves `vertically in one direction togive said bar a detecting move'- ment, and means for moving said VContact means away from said bar substantially'iinmediately following said detecting movement and before the heddle frame has l moved substantially inthe opposite vertical t stantially' independent of the" direction, whereby disengagement ot the detecting means and the bar-is eiiected suby vertical movement of the heddle frame. i

'In a warp stop motion forllooms, lthe combination with a heddle trame having a `series of heddles, of` a substantially horizontallydisposed detector bar movable withsaid movement, said -frame and having a detecting movement therein, a contact element positioned beside said frame, meanscarried by said frameioi" engaging said contact element and'adapted upon engagement therewith `toimpart a dey tecting movement to said bar, and means for causing said contact element to moveaway from said irst mentioned means substantially immediately 'following saidr detecting first mentioned means upon the frame beinelmounted for pivotal movement'about an axis extending at an angle to the aXis'o detecting movement of the bar.

7. In a warp stop motion'for looms, the

combination with alieddle frame havinga f series of heddles, or" a substantially horizontally disposed detector bar movable with said frame and having a-detecting movenient thereon, a contact element positioned beside said'rame, means carried by said `traine or'engaging said contact element and adapted upon engagement therewith to iinpart a detecting movement to said bar, and means for causing said contact element `to move away from said first mentioned means l substantially immediately following said detecting movement, said iiist mentioned means upon the frame having pivotallmovement independent of the detector 'bar and about an axis other than the aXis of detecting movement of the bar.

8. In a'warp stop motion for looms,the combination with a heddle frame having a series of heddles, of a substantially horizontally disposed detector bar movable with said frame and having a detecting movement thereon, a'contact element positionedV beside said frame, means carried by said iframe for engaging said contact element and adapted upon engagement therewith to impart a detecting movement to said bar, and means for lcausing said Contact element to inc ve away from said iirst mentioned means substantially immediately following said detecting -movement, `said first lmentioned means upon the frame being mounted directly upon the bar and having a vertical movement, and means for'l-ocliing thefiirst mentioned means in lixed position when the detector barislocked. p y

9. In a warp stop motion for looms,jthe combination with a heddle frame carrying a series of heddles, of al detector bar movable with the frame and mounted for detecting movement tliereomcontact adjacent said heddle frame adapted to be means position ed fsa engaged as the heddleV frame moves to impart to said `bar aj rocking detecting movement, means movable with said frame `i501" engaging said contact means' to rock `the bar `and being pivotallypmovable upon engagement with said contact meansfmeansf for supporting said contact meansiwhereby the latter may move away from-said engag- 'Vmediately following n ment thereof;

mediately following said detecting movement of the bar, and me nsv for stopping the loom..when said'bar is locked following its detecting movement.

l10. In a warp stop motionfor looms, the combination with a heddle frame carrying a series of heddles, of a'. detector bar movable with the frame. and mounted for detecting movement thereon, contact means positioned adjacent said heddle frame adapted to be engaged as the heddle framemoves to impart to said bar a rocking d'etectingmovement, means movable with said frameand pivotally mounted on an axis other than the axis of said bar for engaging said Contact meansto rock the bar upon contact with said last mentioned contact means, said frame carried means being pivotally movable upon engagement Vwith saidcontact means, means for supporting said contact means whereby the lattermay move away from said engaging means onsaid fra-me substantially immediately following said detecting movement of the bar, and means for stopping the loom when said bar is lockedY following its detecting movement.

1l. In a warp stop motion for looms, aheddleframe having a series of heddles, a detector'bar mounted. in said frame and having a rocking detector movement thereon, a pivoted linger on said heddle frame pivotally movable toimpart detecting movement to said bar, means for locking saidv pivoted nger against movement when said detector bar is looked Vby a fallen heddle, means engageable as the heddle frame moves to rock said bar and move said iinOer, and

means engageable by said finger to stop the loom as the heddle frame moves.

y `12. In a warp stop motion for looms, a heddle frame having `a series of heddles, a detector bar 'mountedin said frame and having'arocking detector movement thereon, a pivoted finger on said heddle frame pivotallyA movable to impart detecting movement toV said bar,means for locking said pivoted finger against movement when vsaid detector bar is locked bya fallen heddle, means engagea-ble by said linger as the heddle frame moves to rock said bar, Ameans engageable by said linger to stop the loom as the Yheddle frame moves following locking of the bar,

and'means for sup ortino said bar rockin@ Il f3 v means to permit the latter to move vertlcally away said detecting move- 18. In a ,warp stop-motion `forlooms, the

combination with a'heddle frame having a yseries of heddles,a detector bar mounted onV said Yframe having la Vrocking vdetecting movement, a contact. linger pivotally mounted for; a pivotal movement independently ofthe bar, butibeing .adapted during iat leasta portion ofv its movement torimpart from said bar substantially im-v to the bar a detecting movement, means engageable as the Yheddle frame moves to move said finger on said bar and to impart a detecting movement to the bar, and means for locking said linger against pivotal movement when the bar is locked by a fallen heddle. V l

14; A warp-stop motion having in combination a plurality of drop wires arranged in parallel banks, oscillating detector bars forV said drop' wires, link means connecting said detector bars for simultaneous oscillation, and means for adjusting the arc of oscillation Vof said detector bars through said link means. y

15. A'warp stop motion'having in com- 'bination' a plurality of drop wires arranged in parallel banks, oscillating detector bars forsaid drop wires, link means connecting said detector bars for simultaneous oscillation, means for adjusting the arc of oscillation of said detector bars through said link means, said adjusting means being adapted to vary the effective length of said Ylink means between the detector bars.

16, In aY warp stop motion vfor looms, a harness frame having a detector bar therein, and a plurality of heddles associated therewith, movable means carried by the harness frame for imparting a detecting movement to said bar as the heddle frame moves in one direction, contact means on the loom vadapted vtobe engaged by said rst mentioned means as the heddle frame moves in said direction, said two vmeans being arranged so as to be disengaged substantially immediately following the detecting movement of said link andV before the heddle frame moves in a reverse direction,whereby to permit the detector bar to move reversely after its detecting 4movement before the h arness frame moves in the opposite direction. Y I

' 17. In a warp 'stop motion for looms, a harness frame having an oscillatory detector'bar therein, and a plurality of heddles associated therewith, movable means carried by the harness frame for imparting an oscillatory detecting movement in one direction to said bar asA the Vheddle frame moves downwardly, contactl means on the vloom adapted to be engaged by said first mentioned means as the heddle frame moves downwardly, said two means being arranged so `as to be disengaged substantially immediately followingv the detecting movement of said link and before the heddle frame moves upwardly, whereby to permit the detector bar tomove reversely after its detecting movement before the harness frame moves upwardly.y 1

18.` In a' warp stop motion for looms, the combination with avertically and-bodily movable detector bar,of -a'l contact element toimpart a detectingmotion tocsaid bar CJD as fit movestivertically .in one direction, andV ately following its detecting movement and substantially before the bar begins to move in the opposite direction, said last mentioned means being independent andl comprising a cam andra member movable thereby, said member .having connectionsy with saidcontact element.

19. In a warp stop motion .for`looms, the combination with a heddle frame having a series of heddles, of a substantially vhorizontally disposed detectorbar movable with the frame and having the detecting movement thereon, contact means engageable as the heddle frame moves in one direction to impart'to the bar a detecting movement, saidcontact means having a normal` detecting position and being movable away therefrom substantially immediately following detecting movement of the detector bar and substantiallybefore the heddle frame moves in the opposite direction, whereby to disengage the contact means from the detector bar, and means for operating said contact element to carry it toward and from its contact position, said means being independent `of the loom lay. i

20. In a warp stop motion for looms, the combination with-a heddle frame having a series of heddles, of a substantially horizontally disposed Vdetector bar movable with the frame and having the Vdetecting move- Vment thereon, contact meansengageable as the heddle frame moves in one direction to impart to the bara detecting movement,V

said contact means having anormal detecting position and being movable away therefrom substantially immediately following p detecting movement of the detector'bar and before the yheddleframe moves in the Voppo- 1 site direction, whereby to disengage the con-` tact means from the detector-bar, and means for operating saidcontact element tol carry it toward and fromrits contact position,

`said means being independent-lof the loom lay and comprising a rotary cam, anda member movable by said cam andhaving connections with said contact element.

2l. In awarp stop motion for looms, and inicombination with the lheddle frame and its said forming heddles, a detector bar carried by the frame and having a detecting movementf therein, a finger carried by the frame and movable thereon about an axis other than the bar, said finger being adapted upon movement to impart a detecting movement to the bar, a `contact element engageable by said finger as the heddle frame moves in one direction to impart movement to the finger and detector bar, saidV contact element having'` a normal contact osition and being movable away there rom of the loom lay substantially immediately .following `detectingmovement of `the `bar 'and' before the heddle frame moves inthe oppositerdirection, and means foractuating said contact element to carry it toward and from its contacting position, .said means being independent of the loom lay. v 1 i .22. In a warp stop motion for looms, and in combination with the heddle frame and its said forming heddles, a detectorbar carf ried by the frame and having-aa detecting movement therein, a movable "finger carried bythe frame and adapted upon movement to impart a detecting movement to the-bar, a contact element engagea-ble by said finger as the heddle frame moves in one direction to impartmovement tothe `linger-and detector bar, `said contact `element having a normal contact position and beingmovable away therefrom substantially immediately yfollowing detecting movement'of the bar,

and substantially before the heddle `frame moves in the opposite direction, and means ,for actuating said Contact element` to carry it toward and from its contacting position., said means being independent` of the vloom lay and comprising a rotary cam element, and a member movable thereby, said mem'- ber having connections with vsaid contact element. L" j .j

23. A warpstop motion `for looms, as

specified in claim 21, said motion-comprising a second contact element engageable upon upward movement of the harness frame and having connections for stopping the loom VAonly when the detector baris locked.`

VV2l. A'warp stop-motion for looms, as specified in claim 22, saidmotion comprising a `second Contact -element j engageable upon upward movement of the harness frame and having connections for stopping the loom only when the detector bar islocked.

25, In a warp stop motion for looms-'and incombination with the lay, 4heddle frame and its shed forming heddles, afdetector bar having a detecting movement, a contact element adjacent the frame and lay ,ulaptedv to imparta detecting movement-to said bar, said contact elementjbeing yieldably lmovable in a substantially horizontal plane. j i j 26, Ina warp stop motion for looms and in combination with the lay,hedd-le frame andV its shed forming heddles, a detector bar having a detecting movement', in said frame, ajcontact element adjacent the frameand lay adaptedto impart a detecting movement Y ltosaid bar as the heddle frame moves, said contact element being yieldably movable in a substantially horizontal' plane `and away ,from the lay wherebyto` prevent injury to the-handjorother 1part interposed between the contactand the lay. y,

"27. Ina warp stop motion for looms and in combination `withthe` lay, heddle frame' andv its shed :forningheddles a detetptorY bar eine e having a detecting movement, a contact Vsaid contact element against horizontal movement whereby the latter may yield horizontally upon interposition of the hand or .other part of an operator .between the contact and the lay.

28. In a vwarp stop motion-for'looms and in combination with the heddle frame and its shed forming heddles, a detector bar having a detecting movement and mounted in said frame, movable means on the loom adapted to be actuated when the detector bar is locked to stop the loom, adagger, means operatively connecting said contact element with said dagger whereby the latter is moved upon actuation of said'-` contact element, said means having a connection with said'dagger of a character adaptedL to cause movement of the latter a predetermined and invariable distance regardless of variations in the distance lof .movement of said contact element when the detector bar is locked.

29.`In a warp stop motion for looms and in combination with the heddle frame and its shed formingV heddles, a detector `bar mountedin said heddley frame and having va detecting movement, a contact'finger movable independently of the detector bar and adapted to impart a :detecting-movement to the latter, Contact meansy mounted on the loom adapted to be .engaged by the contact finger upon movement of ltheheddle frame' in one direction to impart a detecting movement to said bar, and means other than upward movement'of the heddle frame for linsuring discontinuance of moving pressure upon'sa-id detector bar from said contact element upon completion of theV detecting movement of the bar'regardless of variations in the movement of the heddle fra-me.

30. In a Warp stop motion `for loomsand in combination with the heddle frame and itsl shed forming heddles, al detector bar mounted in said heddlefframe and-having aV detecting movement, ,aY contactY finger operatively vassociatedA with saidbar to move the latterand movable independently ofthe detector bar about an axisother than Vthe detector bar axis,` a contact element mounted ,on the loom 'adj acent said heddle frame'adapted to be engaged by YVsaid-finger upon movement oftheY heddle frame in one direction to `impart a detectingmovementto said Vbar, and meansotherf'than lthe upward g movement 'fof' Hthe heddle frame operative -uponcompletion of the detecting its shedfforming heddles,A a detector bar mounted in saidheddle frame and having a detecting movement, a contact fingermovable withsaid frame operatively associated with said bar to move the latter Aand ha ing a pivotal movement about an axisother than the axis of said bar, a contact clement mounted on'the loom adjacent said heddle frame adapted to be engaged by said finger upon movement ofthe heddle frame in one direction to impart a detecting movement to said bar, and means other than the upward movement of the heddle fra-me operative upon completion of the detecting movement of the bar through said finger to relieve the detector bar from moving prossure.

32.' In a warp stop motion for looms and in combination with the heddle frame and Vits shed forming heddles, a detector bar mounted in said heddle frame 'and having a detecting movement, a contact finger movable with said frame operatively associated with said bar to move the latter and having a pivotal movement about an axis other than the axis'of said bar, said finger axis being angularly disposed With'relation to the bar axis, acontact element mounted on the loom adjacent 'said y heddleY frame adapted to be engaged by said finger upon movement of the heddle frame in one direction to impart a detecting movement to said bar, and means other `than the upward movement of the heddle frame operative upon completion of the detecting movement of the bar through said finger to'relieve the detector bar from moving pressure.

33. In a Warpstop motion for looms and in combination with the heddley frame and its shed forming heddles, a detector bar mounted in'said heddle frame and' having a detecting movement, Contact means mountved on the loom adapted to be engaged upon movement of the heddle frame in one direction to impart a4 detecting movement to said bar, and means other'than lupward'movement of the heddleA frame for insuring dis- "continuance of increase in 'pressure upon said detector bar upon completion of its desetY our hands.

' I JOSEPH Gr. IVIENZER.r Y 'HARRY E. 'KHOURY movementlo'f thebar'throu'gh said finger 'to relieve the detector bar from moving pressure;

inv'combinationwith 'the heddle fran'ie-V and 3'1.In arwarp' stop'ymotionfo'r looms and Y

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