US1755097A - Warp stop mechanism for looms - Google Patents

Description

April 15, 1930. c. D. BRQWN 1,755,097

' WARP STOP MECHANISM FOR LOOMS I Original] Filed Feb 14, 1928 Hill" I 1- Hill /NI/ENTOR" ATTORNEY Patented Apr. 15, 1930 U HQDZ IA CARL 1). BROWN, or HQPED'ALE, MASSACHUSETTS, ASSIGNIOR To DRAPER CORPORA- Tron, or Ho EnALn,'MAssAonus Trs, A oonronArron or MAINE i wAinr s'ror MncHAmsM non LooMs Original, application filed February-1 1, 128, Serial No, 254,201. Divided and this application filed March j I 14,:1929. serial No. 347,067.

' This invention relates-to warp stop mechanisms for looms and more particularly to warp stop mechanism of the transversely movable detector bar type,'the present appli- *5 cation being filed as aidivisi'on of applica-. No. 254,201,1iled February 7 tion, Serial 1928.**" t .7

In warp stop mechanism'of the above'm'entioned type relatively fixed? and; movable =10 toothed detecting bars are employed, and the movable detecting bar is given'its-detecting movement by an actuator operated from a going part of the loom. It is found desirable at times to disconnect the actuator from its Idetecting bar and'it'has been the generalprac tice heretofore to detachably'connectthe actuator and detecting barby a link having an open-ended slot to engageajpin fon thede tecting bar. -This construction, however, is

open to thexobjection that theloomattendant while piecing up warp threads or working about the stop motion is liable to accidentally detach the connection between the actuator anddetecting bar, and the presentinvention seeks to avoid this accidental detachment by I providing' a lo'ck'which will afford protection against accidental disconnection and yet permit intentional disconnection of the actuator and detecting bar. I V The invention and novel features thereof will best be made clear from the following, description and the accompanying drawings of one good formthereof. I In the drawings; I I V Fig. 1 is 'anelevat-ionfofwarp stop mechanism embodying the present invention,"some of the parts being shown'in section and one I of the drop wires being shown as arresting a detecting bar; I

'40 Fig. 2 is a sectional side elevation with some parts omitted, showing more particu larly the yieldingly mounted bar actuator connected to it s'detecting bar and'the stop bars embracing the actuator; and I I Fig. 3is-a section on the line 33 of Fig. 2, showing thepmanually operable slide in its detaching position; 1 i

' As is usual in warp stop mechanism of the transversely I movable detecting bar type, a bracket. is secured to each side of the loom Y for supporting the warp stop mechanism, and

in the present instance of the invention the loom'frame is providediat each side thereof 2 with a support 1 fora bracket 2 which may be adjustably's'e'cured in place by the bolts3. "The bracket 2 has an upstanding portion 4-.

to which the side member 5 of the warp stop mechanism is secured by one or more bolts 6. Extending between the side members 5 at OPPOSltGlSldGSOf the loom are the warpv supports 7 of which there maybe any de sired 'numbeu The parts so far described are I I of usual construction and need'no further,

description. I t I Extending between the side members 5 are the fixedtoothed detecting'bars 8 each of which has associated with it a transversely tectingbars appropriate to'the character of the loom in use: and number of warp threads." The ends of the fixed detecting bars 8 are firmly'but're'movably secured to the support ing brackets 5 by the cla'mpingbars 1O having the securing bolts 11. The fixed andmov able detectingfbars are provided {with the V usual teeth adapted to receive between'them a fallen drop wire 12 when the warp thread 'which normally supports each drop wire breaks or becomes too slack, the arrangement 7 being suchthat the back and forth movement which is impartedto'the detecting bar 9 during the norm al operation of the loom will be arrested byithe fallen drop 'wireto thereby effect loom stoppagej II "While different forms of mechanism may 'be employed forimparting the detecting movements tothe transversely movable-bars is disclosed in'the application of which this 9, one good practical construction to this end is a division, and maybe briefly described shaft may be readily'aifectedby alocking screw 16, the construction being such that as the rockshaft is given itsrocking movement,

ers 15 is a detecting bar actuator 18, each of which has two pins 19 on its lower portion adapted to be seated in the fulcrum recesses 17 of the associated rocker 15, and the ac tuator supporting pins 19 are normally held seated in the fulcrum recesses 17 of the asso ciated rocker by a spring 20 connected-atits upperend to the actuator 18, as'by a pin 21, and at its lower end to a part 22 carried by the associated rocker. Each of the detecting bar actuators 18 is connected to its associated are the stop bar carriers 23, two at each side of the warp stop mechanism, as shown. EX- tending' between the stop bar carriers 23 are the stop bars 24 which may be rigidly se- 7 cured to the associated carriers by means of the set screws 25, and the stop bars 24 normally embrace the actuator or series of actuators 18, one bar being positioned at each side of the actuators, and, as willpresently appear, yielding means are provided for holding the stop bars 24 in the described relation to the actuators. y r 1 One of the stop bars 24 has secured thereto the link 26 which is provided with a slot 27 into which the opposite or companion stop bar 24 extends. 7

Mounted in the slotted portion of the link 26 is a plunger 28 which is normally under the influence of a spring 29 v which serves to hold the end of the plunger against the stop bar 24 in the slot of the link, with the result that the two stop bars disposed at opposite sides of the actuators 18 are held in yielding relation against the opposite sides of the actuator or actuators. The plunger 28 may be appropriately carried by a sleeve 30 which may be secured by a set screw '31 to the link 26, andbearing upon the enlarged portion 32 of the plunger is the endof a flexible sheathed wire 33, which serves to transmit longitudinal movement of the plunger to thereby call into action the stop mechanism. The details of the stop mechanism are not herein shown, asthey may be of any appro priate character, as, for instance, that disclosed in the patent to HarryA. Davis and Arthur S. Johnson, No. 1,538,625, dated May 19, 19 25, i r

actuator 18 will likewise be arrested, while From the construction thus far described it will be apparent that should one of the detecting bar actuators be arrested in its movement, it will act through one of the stop bars 24 to arrest such stop bar, whereupon the other stop bar which is moved by the actuators will act either through the link 26 or the stop bar in the slot of the link to cause relative movement of the plunger and link to thereby move the sheathed wire33 and eifect loom stoppage, as more fully set forth in'the parent application above'referred to.

relates more particularly'tomeans forsecuring and'locking the actuator 18 to the transversely movable toothed detecting bar 9, so that alldanger of theserparts being accidentally disengaged is avoided. This mechanism may take various forms but as illustrated in the present instance of the invention, the actuator 18 is provided with a manually operable slide 34, the lower end portion of whichis bifurcated, as at 35, to engage a pin 36 rigidly secured to the movable detectingbar 9, the construction being such that when the slide 34 is moved downwardly relative to the actuator upon which it is mounted, the bifurcated end 35 will engage the pin-36 and upon movement of the actuator will impart movement to the detecting bar 9.' g

As will beapparent fromFigs. 2 and 3, the actuator 18 is provided with the pins 37 which engage the elongated slots 38 inthe slide 34 and these pins are provided with enlarged overlapping heads 39 adapted to retain the slide 34 in sliding engagement with the ac As above indicated, the present invention tuator 18. WVhen the slide 34"ismoved downwardly into engagement with thepin 36 of the associated detecting bar, it is, important that such connection be not accidentally disturbed by the loom attendantin piecing up provided upon the slide34 which may be r 1 constitutedas a ball or sphere held in a recess formed in the slide 34. This projection or "ball is adapted to engage either. one of the twoopenings 41, 42 formed in a strap or blade 43 which overlies the projection or ball 40 carried by the slide, and the strap is held in fixed position relative to the slide by engaging beneath the enlarged heads 39 of the pins 37'. The strap 43 is appropriately formedas a leaf spring, with the result that when theslide 34 is in its upperposition,as

indicated inFig. 3, and the ball 40 is engaged with the upper-opening 41 in'the strap, the slide will. be firmly held in its inactive position, thus freeing the connection between the actuator andits assoeiateddetecting-bar5 similarly, when the slide 34 is in-its lowered position, as indicated in Fig. 2, to which it may be'readilymoved by manual effort, the

I ball 40 will engage the lower opening in the strap and maintainthe actuator locked to its detecting bar.

' From the construction described it will be apparent that accidental disconnection be- I tween the actuator and its toothed detecting and when disconnected the manually oper-,

' the slots in the slide, the upper onepreferably bar Will-be preventedby the manually operable slide and lock associated. therewith to hold the slide in engagement with the pin 36,

able slide will be held'by the lock in its inactive position. r

- The movement of the slide to and from its locking position is limited by the length of as shown, in connection with the pin or pins securedto the actuator and when any one of the slides in a plural bank warp st0p-mo-. tion is' raised to disconnect the actuator from the associated detecting barthe fact is ob servable by the top'po'rtion of the-slide prowhether or not any bank of the warp stop jecting above the companion slides, so that the loom attendant is at-once informed of motion is functionally inoperative.

' Any suitable means maybe employed for imparting to the rock shaftl l-and'the rockers 15 the desired rocking movement, but in the present instance of the invention the rock shaft 14 has secured thereto, an arm 44,the

outer end portion of which is provided with a slot whichis engaged by a'pin'46 con as such details form'no part of the present invention they are not herein further described and are, moreover, well-known in the art. 7

What is claimed is: 1 Inawarp stop mechanism forlooms, the combination of aseries of drop wires, a transversely movable detecting bar, a detecting bar actuator,'means for connecting the bar is arrested by a drop wire.

bar actuator and thedetectingbar, a lock which operates automatically as said con necting means is moved 1nto connecting po-.

sition to prevent accidental disengagement between said connecting means and the transverselymovable detecting bar, and means for efiecting loom stoppage when the detecting 2. In awarpstop' mechanism for looms, the combination of a series of'drop wires, a transversely movable detecting bar, a yieldingly operated detecting bar actuator, manually actuated meansgfor detachably connect ing the actuator and detecting bar, alock operated automatically'by manual actuation of the connecting meansto prevent accidental stoppage when the detecting bar is arrested by a drop wire. ,7 u r 1 3. In a warp stopmechanism for looms,

the combination of a series of drop wires, a transversely movable. detecting bar, a de-V tecting bar'actuator, andmeans for detachably connecting the actuator and detecting bar,and a friction lock which operates automatically asv the, actuator and detecting bar disconnection, and means for effecting loom v are connected by said means to prevent accidental disconnection, r I, r 4. In a warp stop mechanism for looms, the combination ofa'series of drop wires, a transversely movable detecting bar, a de-.

'tecting' bar; actuator, a member fordetachably connecting the actuator and detecting bar andmounted on one of them for'relative movement into and outofconnecting position, and an automatically operable lock-for.

preventing accidental movement-of said member out ofconnectingposition 5. In a warp stop mechanism-forilooms,

the combination ofa series of dropwires, a

transversely-movabledetecting bar, :a detecting bar actuator, and means for detachably connecting the actuator and. detectingbar including a slide mounted for manual sliding movement upon the actuator into and out of engagement with the detecting bar and a lock, which operates automaticallyas the slide is manually moved into engagement with the detecting bar to prevent accidental disengagement of the slide and detecting bar.

6. In a warp stop mechanism for looms, the combmation of a series of drop wires, a

transversely movable detecting bar, a-detecting bar actuator, means for detachably connecting theactuator and detecting bar including a member mounted for longitudinal sliding movement upon the actuator into and out of engagement. with the detecting bar and a friction lock which operates automatically to lock the sliding member fromaccidental movement into and out of engagement with the detecting bar. I

7. In a. warp stop mechanism for looms, I the combination of'a series of drop wires, a transversely movable detecting bar having a projection through. which operative movement is imparted to the bar, a detecting bar actuator,an'd means for detachably connecting the actuator and detecting bar including a slide Tmounted upon said actuator for slid ing movement longitudinally along the actuator into and out of engagement with said projection. I I V I I 8. In a'warp stop mechanism for, looms,

the combination of a transversely movable ment with the detecting bar, connections betweensaid means and the actuator for limit ing the movement of said means into andout of operative relation Withthe detecting bar, and alock for holding said means in either of its two positions. 7

9. In a Warp stop mechanism for'looms, the combination of a transversely movable detecting .bar, a bar actuator, a connector mounted on the actuator andmovable longitudinally on the actuator into and out of operative engagement with the detecting bar, and locking means betweenthe connector and actuator acting automatically as the connector is moved into operative engagement with the detector bar for holding the connector in operative engagement with the detecting bar. r

10. In a warp stop mechanism for looms, the combination of a transversely movable detecting bar, a bar actuator, a connector constituted as a slide mounted upon the actuator for longitudinal movementrelative thereto-into and out of engagement With the detecting bar and having'its end extending above the actuator to constitutea signal when the slide is disengaged from the detecting bar, and a lock for holding the slide in either of its tWo positions. v

In testimony whereof, I have signed my 7 name to this specification.

I CARL D. BROl/VN;

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