US1438564A - Warp stop mechanism for looms - Google Patents

Description

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WARP STOP MECHANISM FOR LOOMS.

AP'PLICATIION man MAR 16, 1922.

2 SHEETSSHEET '1,

1,438,564. Patented Dec.12,1922.

U I f um I h m a/c, W

I. smow. WARP STOP MECHANISM FOR LOOMS.

APPLICATION FILED MAR. 16, I922- -2 SHEETS-SHEET 2- Patented Dec. 12, 1922?.

Patented Dec. 12, llQZZ.

ISAAC SHOW, 05 LIUNRENCE, IEASSAGTHUSETTS. ASSIGNOR TO DBAPEE CORPORATION, OF HOZPEDALE, I'DIASSAGHUSETTS, A CORPORATION OF HIAINE.

"WARP STOP MECHANISM FOR LOOMIS.

Application filed. March 16, 1922. Serial No. 5%,072.

To all whom it may concern:

Be it known that I, Ismxo Snow, a citizen of the United States, residing at Lawrence,

breaks or becomes too slack for wearing purposes. It will happen at times during weaving that a warp thread will become crossed over other warp threads and produce defective clothunless the condition is remedied. Such crossing of a warp thread may occur when a warp thread breaks be tween the shedding mechanism and the fell of the cloth. In such case the broken end of the warp threac is liable to extend lat-- orally of the loom and cross several of the warp threads of one of the shed planes, and when the shed is changed by the shedding mechanism, the crossed end of the broken warp thread will deflect the warp threads of the other plane of the shed. and cause increased tension to be exerted on the warp threads of that plane. Should the weaving operation continue under such condition defective cloth will be produced and therefore one of the purposes of the present invention consists of means for effecting loom stoppage when a drop wire of the warp stop mechanism is abnormally raised by a warp thread.

It is also desirable to stop the loom when one of the warp threads breaks or becomes too slack for weaving purposes, and another important feature of the present invention therefore consists of a warp stop mechanism in which two feelers are employed, one of which is adapted to be arrested and effect loom stoppage when a drop wire is abnormally raised and the other of which is adapted to be arrested and effect loom stoppage when a drop wire is abnormally lowered as by breakage or undue slackage of a warp thread. i i

The accompanying drawings illustrate one good form of the invention wherein one of the feelers is constructed and arranged to be arrested in its detecting movement above the plane of the warp threads and the other of which is adapted to be arrested in its detecting movement below the plane of the warp threads; and while this consti-v tutes a good form of theinvention the essential advantages thereof may be secured by other arrangements of the feelers and drop wires. In the drawings, Fig. 1 is a perspective view, showing sufficient portions of a loom to make clear the association of the present ;invention therewith.

Fig. 2 is anenlarged cross sectional view of the warp stop mechanism proper.

Fig. 3 is a detached. enlarged detail showing one means for giving the two feelers their detecting movements.

Fig. 4 is a modified form of means for giving the two feelers their feeling movements.

It is the object'of warp stop motions, as now generally constructed, to stop the loom whenever a warp thread breaks. This functional operation of thewarp stop motion is dependent on the release of some kind of a detector or drop device by the broken warp thread which becomes too slack to support the drop device or detector. It sometimes happens, however, that the end of the broken thread gets crossed laterally of the adjacent intact warp threads and is held taut or does not slacken sufiiciently to free the drop device or detector, and in such case these prior warp stop motions fail to function even though a warp thread breaks.

The warp stop mechanism of the present invention includes a series of drop wires which are normally supported by the warp threads during weaving and which are free to move into an abnormal position either by breakage or by undue slackness of a warp thread or into another abnormal position by undue tension of the warp thread, the two feelers are constructed and arranged, one to eifect loom stoppage when a drop wire moves into one abnormal position upon breakage or undue slackage of a warp thread and the other feeler of which 1s ar-- rested whena drop wire ismovedinto the other abnormal position by undue tension exerted on a warp thread.

The warp threads at are wound upon thethe warp stop motion proper, either with or without being positioned by the lease k mechanism by which the warp threads are divided into appropriate sheds from time to time then through the reed of the-lay and frontwardly to the fell of the cloth or weaving line and thence tothe usual sand. roller or take up.

rodsfthen through the shedding;

The loom frameis of usual character appropriatefor supporting the loonrparts and has a breast beam 4 to which. is secured the temple 5 which engages'the cloth Z) at the point rearward of the usual sand or take up roll 6. The lay 7 has the usual reed 3 through which the warp threads pass as usual, and the lay is given its usual beat up movements by a well known train of mechanism. i I

The shedding mechanism for-producing a shed for the introduction of the weft or filling thread may be of any usual and well known type and as indicated in Fig. 1 comprises theharness forms 9 and 10 between the upper and lower bars of which arethe heddles 11 each having "an eye for the pas sage of a warp thread as usual. The mechanism for forming; the shed not'show'n be cause the details thereof formn'o part of the present invention and may be of the usual and well known character.

The warp'stop motion proper as shown in I Fig.1 is positioned between the" shedding mechanism and the whip roll and is supported on suitable brackets 12 extending from ca ch .side of the loom fra me. To facilitate adjustment of the warp stop mechanism' proper into its desired position the brackets 12 maybe providedwith slots'13 engaged by bolts, 14 passed through the slots 15 of side brackets 16 oneat'ea'ch side of the loom.

' Since each'of theside brackets 16 may be of the same construction it will not be necessary to describe more than one.

drop wires20, two rows of such drop wires being shown in the present instance. Each drop. wire 20 is normally supported by a warp thread a, during weaving and in the present instance each drop wire has an opening or eye 21 through which the warp thread may bepassed. The drop'wires are guided" in their movements and as shown each drop wire in the presentinstance has an elongated slot 22 through which extends one of the drop .wire guides 23; the construction being such that the drop wires 20 which are arranged in rowsinay be guided in their up and down movements for the action of the feelers, presently "to be described. The thread guides 23 are secured at each side of the loom to the side members 1'? as indicated in Fig. l. H

In accordance with the present invention the loom is to be stopped when one of the drop wires drops or is free'dfrom its warp support by he breakage or unducslackness of a warp thread andalso when one of the drop wires is moved into another abnormal position by unduete sion on a warp thread. This feature of the invention is carried into effect by two feelers one of which is arrested by an abnormally raised drop wire and the other of which is arrested by an abnormally lowered drop wire.

In the present instance the warp rest members 18 are each provided with the tooth plates 24% and mounted for detecting movement towards andfrom the plates 24: is the feeler 25. 'Thc feeler 25 is shown as hav ing a toothed edge portion 26 at each side adapted to engage and be arrested by one of the drop wires when it fails to be supported by a warp thread; The feeler 25 is secured to rocker arms 27 of which there may be a suitable number to properly support the feeler between the sides of the loom. The

feeler rocking arms 27 are mounteduponthe rocker ment, as usual in warp stop motionsy from some going part ofthe 1007111. In the pres ent instance the rocker 28 has the lugs 29,

Fig. 2, which are connected by links 30 to a train of mechanism for imparting to the rocker 28 andperforce the feeler 25 the feeler or detecting movement; The train of mechanism to which reference has been made may be-of the general type of that shown 28 which receives'a rockingmoyethrough which the 'leeler extends.

ine; the extension3h with the lower and describedin the patent to George -linbleti'. No. 863,830, August 13:5. 1907, but any well known trains of mechanism for giving the iceler its detecting movement may be employed. In tl e present instance of the invention the stopping mechanism comprises means for arresting the loom operation'when one o1"? the feelers is arrested. Such stopping mechanism is typified in Fig. l by the shipper 31 which may be thrown from holding notch 332 to effect loom stoppage substantially indicated in the An bler patent hereinbeitore mentioned.

The rocker arm 27' at the side of the loom is shown as outside of the bracket or dowin ward extension 3?) of side member .ll' by which the roclrer is Supported, and. in such case the portion is provided with aslot 34: The slot is of appropriate size and character to permit the teeler to partake of its detecting movements. 1

Extending transversely ot the loom, and as shown in the present instance, between the warp rest men'ibers 18 is a rod or shaft on which mounted for rockingmovement the other te'eler member which acts to effect loom stoppage when one. of the drop wires is abnormally raised by a warp thread unduly tensioned. In the form of the invention indicated in Figs. 1 and 2 the rod or shaft extends outside of side members 17 and lldSdl'lOllTllltXl thereon the tteeler 36, the

upper portion 37 of which extends transversely ot the loom adjacent to the upper end portions of the drop wires. The side members of the teeler 36 or at least one of them has adownward extension 38 which passes through an opening 39 in the bracket 16 and at its lowerend connected with the other feeler.

In the present instance the feelerfifiis connected to the feeler 25 through the extension 38. Fig. 3, the lower end portion of which is loosely connected to thelugs 39 carriedv by the train of: mechanism constituting the lower teeler. The lugs or bearings 39 have an enlarged opening 4C0 through which. passes the pin ll. l inl 1;:

From the construction thus tar dos it will be apparent that the detecting movement given to the lower teeler 25 will impart detecting movements to the other or upper teeler and that such movements of the two feelers will be in opposite directions. In other words. when feel-er 25 moves to the lctt. 2. iieeler 36 willmove to the right. and it either feeler be arrestedby a drop wire it will act through the trainoi stop mechanism to effect loom stoppage.

Fig. i shows a modified form of the connections between the two feelers whereby both feelers will move simultaneously inthe same direction rathjerl than, in the opposite direction. as effected by the hereinbetore de scribed connections between the two feelers. In Fig. L the rocker '28 which is the same as the rocker of Fig. 2 carries the teeler ZLKIDS 42 of which there may be any desired numher. to which is secured the lower .teeler 43. The rocker 28 is given its rocking movement by the train of mechanism such as is shown tor instance in the patent to Ambler hereinbetore mentioned. In Fig. i the rocker 28 has an arm 44; connected by a link t5 with an arm 46 extendingtrom the hub portion of the upper ieeler supporting arm a? carrythe rod or teeler 4:8. The arms 46 and 4%? are mounted on the rod or shaft 49. Fig. t, the construction being such/that upon rocking movement of the rocker28 the lower teeler will be given its detecting movement and the upper :teeler will be given a like detecting movement in thesame direction.

Should a warp thread become crossed, that is be crossed over two or more warp threads forming the shed, it will bind together the adjoining threads ot the other shed plans when the shed is chan ed and consequently put increased tension on the threads of such other plane This is indicated in Fig. I wherein the warpthreadc of the lower shed. is shown as having been broken between the shedding mechanism and the reed of the layand such end a. is indivcated. as crossing several of the warp threadspso that as the threads which iorno the upper plane the shedare; raised by "the sheddingmechanisin the warp threads are given an increased tension: or lengthwise pull due to the deflection of such threadsby the crossed warpend. The effect of this is that the. warp threacs that have been crossed by the broken end-lift or raise the drop wires through which they pass. As indicated in Fig. 1 there are usually several warp threads given increased tension under the conditions noted and so several. of the drop wires are raised. It inay sometimes happen that the warp threads that form the diii'erent shed planes may be stuck together or intertwined by a stray piece of thread or by a bunch of flutl or fibre in which' case the increased tension will be placed upon the warp threads thus bound together and the associated drop wires will be raised when the shed is formed.

Usually it will be sufficient to depend upon the shedding mechanism to lift the drop wires an abnormal amount or into stopping position when the shed is formed but in some cases it may be desirable to lace the warp stop motion proper, slightly below the horizontal plane passing through one to be arrested by a drop wire when it is moved into an abnormal position by the breakage or undue slackness of a warp thread and the otherof which is moved into another abnormal position by undue tension placed upon the warp threads, the effect being that imperfect cloth which may result from either broken or too slack threads or from a crossed warp thread will be prevented because the loom will be stoppedon the occurrence of either defect in the threads and enable the weaver or attendant to cor rect the fault.

What is claimed 'is: I I

1. In a warp stop mechanism forlooms, the combination of a series of drop-wires normally supported by the warp'threads during weavin loom stopping mechanism,

two feelers having detecting movements, one

above andthe other below the plane of, the warp threads,and connections between the feelers and stopping mechanism for, stopping the "loom when a drop wire is raised to an abnormal position by a warp thread or is lowered to an abnormal posit-ion due to breakage or slackness of .a warp. thread.

2. In a Warp stop mechanism for looms,

the combination of a series of drop wires normally supported by the warp threads during weaving, two feelers having detectmg movements, one of which feelers is con structed and arranged to be'arrested when a drop wire is abnormally raised by a war p,

thread and the other of which is constructed and arranged to be arrested by. a drop wire when a warp thread breaks or becomes too slack, and stopping mechanism for stop;

ping the loom when the detecting movement of either of the feelers is arrested.

' 3. In a warp stop mechanism for looms, thercoinbination of a series of drop'wires adaptedto be supported by the warp threads during weaving, drop wire guides for the series of drop wires, two feelers having detecting movements, one of said feelers adapted to engage and'be arrested by a drop wire when it is raised to an abnormal position, and the other to engage'and be arrested by a drop wire/when it lS'lOWQIGCl to an abnormal position, and, stoppingmechamsm. for stopping the loom when either of the feelers is arrested. I

4. In a warp stop mechanism for looms,

the combination of shedding mechanism, a

series of drop wires adapted to bes'upported by the warp threads during weaving, a feeler having a detecting movement above theplane of the warp threads and adapted to bearrested by a drop wire when it is abnormally raised by a warp thread, and loom stopping mechanism for stopping the loom when the feeler is arrested by an abnormally raised dropwire. j

'5. In awarp stop mechanism for looins, the combination of shedding" mechanism, a

series of drop wires adapted to be supnism for stopping the loom when either feeler is arrested by a drop wire.

6. In a Warp stop mechanism for looms, the combination of a series of drop wires adapted to be supported by the warp threads during Weaving, loom stopping mechanism, two feelers one of which has a detectlng movement adjacent the upper portions of the drop wires and the other of which has a detecting movement adjacent the lower portions of the the drop wires, and means controlled by the two feelers to cause the stopping mechanism-to effect loom stop-- page when either of the feelers isarrested by a drop wire. j I

7. Ina warp stop mechanism for looms, the combination of. a series of drop wires adapted to be supported by the warp threads durin weaving, loom stopping mechanism,

two f eelers one of which has a detecting movement adjacent the upper portions of the drop wires and the other of which has a detecting movement adjacent the lower portions of "the drop wires, connections between the feelers and means controlled by the twoufeelers to cause the stopping mechanism to effect loom stoppage when either ofthe feelers is arrested by a drop wire.

8. In a warp stop mechanism for looms,

-the combinationflof-a, series of. drop wires adapted to be supported by the warp threads during weaving, loomshedding mechanism, two feelers having detecting movements toward and from the drop wires, the detect- -1ng movement of one ofthe feelers being arrested when a drop wire is abnormally raised and the detecting movementof the other feelerv being arrested when a drop wire .is abnormally lowered, and loom stopping mechanism for stopping the loom when the detecting movement of either feeler is arrested. 1 I p 9. In a warp stop mechanism for looms, the combination of a series of drop wires adapted to be supported by the warp threads during weaving, loom shedding mechanism, a feeler having a detecting movement and adapted to be arrested by an abnormally raised dropwire when the shed is opened, loom stopping mechanism for stoppingthe loom when'a drop wire is abnormally raised and another feeler adapted to-be arrested and effect loom stoppage when a warp thread breaksor becomes too slack.

10,- In a warp stop mechanism for looms,-

the combination of a series of drop Wires adapted to be supported by the Warp threads during Weaving, drop Wire guides for the drop Wires, tWo feelers, one of Which is adapted to engage and be arrested by a drop wire above the plane of the Warp thread and the other of which is adapted to engage and be arrested by a drop wire below the plan: of the Warp threads, and loom stopping mechanism for stopping the loom when either of the feelers is arrested.

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

ISAAC SNOVW

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