US1011237A - Warp stop-motion for looms. - Google Patents

Description

E. 1). oseoon & A.- E. RH'DADB'S.

WARP STOP MOTION FOR LOOMS. APPLICATION rum) no. 20, 1910.

Patented Dec. 12, 1911.

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akqqz TENT (if EDWARD DANA OSGOOD AND ELONZO E. EHOADEfi OF HOPEDALE, MASSACHUSETTS, ASSIGINOBS TO DIELAPEPJ CQMPANY, 0F HOPEDALE, MASSACHUSETTS, A CDLEEOM.

T1011 OF MAINE.

WA RP STOP-MOTION FOR LGOMS.

tonne Specification of Letters Patent.

Patented 113cc. 2'12, ihflilfl To all whom it may concern:

Be it known that we, EDWARD DANA Osoooo and Ammo E. RI'IOADES, both citizens of the United States, and residents of Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Warp Stop-Motion for Looms, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates more particularly to loom stop-motions of the type wherein an electrical circuit is rendered operative to effect the actuation of the stop-motion by or through failure of one or more warpth-reads. In one form of such apparatus the metallic detectors or drop-bars are arranged in a plurality of banks, each detector being suspended from a single warp-thread and capable of free movement of the warpthreads, said warp-threads being so disposed that each thread is normally out of contact with the detectors suspended from two adjacent threads, thereby avoiding chafing of the threads. -This brings the detectors wholly below the sheet of warp, and when a .particular detector descends or drops into electrical contactwith one terminal of the controlling circuit, the latter is closed and rendered operative, the detectors themselves at all times being in electrical contact with the other terminal of such circuit. A warp stop-motion of this type forms the subjectmatter of Beissued United States Patent No. 11,923 granted July 30, 1901 to Coldwell and Gildard. When the loom is stopped by the stop-motion therein disclosed the weaver must discover the location of the faulty warp-thread, and this is done by causing the loom to run while the weaver watches for the spark between the dropped detector and the circuit terminal onto or against which it has dropped. The presence of the spark thus marks the location of the dropped detector, the vibration or jarring .of the loom when running causing such de tector to jump or chatter toward and from the lower terminal and thereby c ause the sparking.

It will be understood that after the stop running, so long as the warp fault is uncorrected, unless the shipper is retained in running position against the releasing tendency of the. stop-motion, and there are two methods in use for keeping the shipper in running position. By the one method one operative holds the shipper in running position while the weaver goes to-the side of the loom and looks under the sheet of warp for the tell-tale sparking which locates the dropped detector and the faulty warpthread', two persons being required to manipulate the loom. By the other method the weaver jams something against the shipper to hold it in running position while he looks for the spark, and usually a bobbin is either forced into the slot of the notched holding plate to retain the shipper in desired position, or the bobbin is inserted between'the shipper and the stopping end of the slot. This tends to break or split bobbins and is in every way objectionable, and the other method is objectionable because itrequires the cooperation of two persons whenever loom stoppage is due to a warp fault.

Our present invention has for its object the production of simple and ellicient means for preventing automatic movement of the shipper to stopping position whenever necessary, and as our invention is particularly useful in connection with a warp stop-motion of the class disclosed in the patent referred to we have shown our invention as applied to a loom provided with such a stopmotion. It will be understood, however, that our invention is not necessarilyrestricb ed to that particular form of stop-motion, as it can be used with other forms wherein the ship-per can be retained in running position without injury to a continued or recurrent operation of the stop-motion.

The novel features of our invention will be fully described it the subjoined sp cification and particularly pointed out in the following claims. 3

Figure 1 is a left-hand side elevation of a portion of a loom provided with an electromechanical warp stop-motion of the class referred to, and with one embodiment of our present invention applied thereto; Fig. 2 is an enlarged. transverse sectional view through the lease rods and adjacent parts, showing the detectors or drop-bars and the circuit terminals with which such detectors pooperate when a warp fault occurs; Fig. 3 IS a rear elevation of the notched holding plate for the shipper, and the novel means for. rendering inoperative the releasing means wi h respect to the shipper, the various parts being shown in normal position;

Fig. 4 is a top plan view of the parts illustrated in Fig. 8.

Referring to Fig. 1 the upright brackets 2, 2.1nounted opposite each other on the loom-sides, each having at its inner side a bearing-bracket 7 provided in practice with a-suitable bearing of insulating material to sustain one end of a copper or other metallic electrically connected with an insulated wire 52 forming part of an electric circuit and leading to one pole of the battery 50 or other source of' electrical energy; an insulated wire 51 leading from the other pole to the coils of an electro-magnet 3 4 inclosed in a box or case 33; the pivoted armature-lever 36 and its referred to and operate armature 37, and the contact-spring 40 insulated from the loom-side and connected by insulated wire 42 with the magnet, said spring 40 being arranged contact with the metallic shipper 28 when the latter is in running position, may be and are all substantially as in the patent as therein set forth.

Above the contact roller 10, which forms one terminal of the controlling circuit, the brackets 2 support two horizontally disposed, flat metal rods 19, spaced a suitable distance apart and inclined toward each other at their upper edges, said rods constituting the other terminal of the controlling circuit from spring 40, shipper QSand the loom-frame, as will be apparent. Lease rods 24 are supported by the brackets 2 above the terminal rods 19, see Fig. 2, and over and under the lease rods the warpthreads are alternately passed in usual manner, as in said patent. The sheet-metal drop-bars or detectors 25 are longitudinally slotted to easily fit over and slide longitudinally-upon the terminal rods 19, and each one terminates at its upper end in an eye 26 to loosely straddle the warp-tl-n'ead, as in the aforesaid patent, and normally the con trolling circuit is held open by the intact warp-threads maintaining the detectors 1 lifted and out of engagement with the terminallO. lVhen a warp-thread fails its detector drops onto said terminal 10, and

' --the."el'ctrical circuit is completed, the magnet 341being energized and thereby its armature 37 is attracted, while the free end of the lever 36 is raised, it being understoeo that the 100111 frame forms a part of such circuit. The knock-off lever 14, fulcrumed at 43 below the notched holding plate 29 for the shipper 28, has pivotally connected with it at 45 a rearwardly-extended gravity-latch to be in electrical 4E6, notched or shouldered'at 47 and connected by a light rod or link 49 with thearmature-lever 36, as in the Coldwell and Gildard patent, and as therein described, when the magnet is, energized and its armature is attracted the latch 4-6 is positioned to be struck by the lay on its forward stroke, whereby the knock-off lever 44: releases the shipper from its holding notch in thev plate 29.

\Vhen the loom has been stopped by re'ason'of a warp-fault the position of the dropped detector is indicated by sparking between itand the terminal 10 when the loom is caused to run by maintaining the shipper in running position. We will now describe the means whereby we prevent ship.- per'release when the loom is started forthe purpose of finding the faulty warp-thread. At'the rear side of the plate 29 above the latch l6 we fulcrum at a 2. depending detent b, the head I) of which is extended across the holding plate, Figs. 1 and 4, far enough to be normally engaged, when the shipper is in running position, by a dog 0 pivoted at 0' on the shipper, said dog having a finger piece 0 on its outer end, a stop 0* on the shipper preventing the heavier inner end of the dog from swinging down below the head Z) of the detent. Normally the weight of the inner end of the dog keeps it in the position shown, Fig. 3,;when the shipper is in running position, so that the dog then engages the head Z) and swings the detent b outward carrying its lower end to one side of the latch 46, and no obstacle is presented to the upward movement of the latch into operative position to be engaged and pushed forward by the lay to effect shipper release. Ordinarily the weaver pays no attention to the detent or its controlling dog 0, butafter stoppage of the loom by a warp fault, when it is desired to run the loom and locate the dropped detector, the weaver moves the shipper to running position and at the same time depresses the finger-piece 0 thereby lifting the inner end of the dog c'so that when the shipper enters its holding notch said dog passes above and drops onto the head 6 and the detent Z) remains in the position assumed when the shipper was automatically released, the lower end of the de tent being above and in the path of the latch 46. The loom is of course started up by the movement of the shipper to running position, and as the warp fault has not been corrected the controlling circuit is closed by engagement of the shipper with the spring contact 40 and also by engagement of the tively positioned above said latch the latter cannot rise and hence it cannot be engaged by the lay on its forward beat. As a result the shipper remains in its holding notch, and the loom continues to run, giving the Weaver a chance to move about the loom to a point where he can see the sparking betweenthe dropped detector and the terminal 10, and thereby locate the dropped detector. When the dropped detector is located the faulty warp is properly manipulated to correct the fault, and the loom is stopped by throwing the shipper manually out of its holding notch. Thereupon the dog a resumes its normal position on the shipper and when the latter is again moved to runningposition said dog engages the head Z) of the detent and moves the latter to the position shown, at one sideof the path of the latch- 46. Should, the detent be operatively positioned while the shipper isin running position, as has been described, the weaver can by hand move'the head I) inward from beneath the dog, the latter then dropping into the-position shown in Fig. 3 to engage said head and hold the detent in inoperative position. By means of our invention the weaver can manage the loom without assistance when a warp faultoccurs, and the use of a bobbin or some other device to prevent movement of the shipper to stopping posi- 'tion is wholly eliminated.

. by Letters Patent is:

Changes or modifications in, different details of construction and arrangement may be made by those skilled inv the art without departing from the spirit and scope of our invention as set forth in the claims hereto annexed.

Having fully described our invention, what we claim as new and desire to secure 1. In a loom, a shipper, and releasing mechanism therefor including a latch and electro-mechanical means to operatively position it by or through the occurrence of a warp fault, combined with a device adapted to prevent operative positioning of the latch, and a controlling member for said device, mounted on the shipper and normally maintaining the said device inactive with respect to the latch when the shipper is in running position, abnormal positioning of the controlling member when the shipper is moved to running position permitting said device to cooperate with the latch and prevent movement thereof to operative position.

2. In a loom, a shipper, and releasing Inechanism therefor including a latch and electro-mechanical means to operatively position it by or through the occurrence of a warp' fault, combined with means forming a part of the loom instrumentality and which normally permits the operative positioning of said latch when theshipper is in running position, said means including. a

member manually movable into position to render'the means active to prevent such op erative positioning of the latch, whereby the loom can be run when desired during the continuance of the warp fault.

3. In a loom, a shipper, andreleasing mechanism therefor including a latch and electro-mechanical means to operatively position it by or through the occurrence of a warp fault, combined with separate means to prevent operative positioning of said latch and normally rendered inactive by movement of the shipper to running posi tion, said means including a member manually positioned to render the means active to prevent operative positioning of the latch.

4. In a, loom, a shipper, and releasing means therefor including a latch, combined with automatic means adapted to operatively position the latch byor throughgthe occurrence of a warp fault, and separate means comprising two members normally adapted to cooperate and thereby permit operative positioning of the latch by said automatic means when the shipper is in running position, manual movement of said members out of cooperation acting to prevent operative positioning of the latch.

5. In a loom, a shipper, and releasing mechanism therefor actuated by or through the occurrence of a warp fault, combined with governing means .for the releasing mechanism comprising a controlling member movable with and also relatively to the shipper and a separately mounted-detent normally maintained inoperative by said controlling member when the shipper is in running position, said means serving to prevent the actuation of the releasing mechanism when the shipper is in running position and said controlling member is moved manually into abnormal position.

6. In a 100110; a shipper, and'an electromechanical stop-motion adapted to effect shipper release by or through failure of a warp thread, combined with means, comprising a plurality of members, to at will render said stop-motion inoperative to efi'ect shipper releasewhen the shipper is in running position, movement of the shipper to such position normally acting to effect coopera tion of said members and thereby render said means inactive with respect to the stopmotion.

7. In a loom, a shipper, a series of stopmotion controlling detectors suspended from prising a detent member, and a controlling member on the shipper, to prevent at will the normal operation of said shipper releasing means when the shipper is in running position and a detector is positioned abnormally, whereby the loom can be run while such detector is located by the weaver.

8. In a loom, a shipper, and releasing mechanisi 1 therefor including a latch and means to operatively position the same upon the occurrence of a warp fault, combined with a detent movable into cooperation with and to prevent operative positioning of said latch, and a controlling dog carried by and movable relatively to the shipper and normally acting to render the detent inoperative when the shipper is in running position, manual movement of said dog to clear the detent when said shipper is moved to running position permitting the detent to remain operative with respect to the latch.

9. In a loom, in combination, a shipper, an electro-mechanical warp stop-motion including a series of controlling detectors and adapted to effect shipper release upon dropping of a detector due to a warp fault, and means to at times prevent shipper release by the stop-motion, when the latter is set in action by a dropped detector, whereby such dropped detector causes the formation of a series of electric sparks, said means comprising a plurality of normally cooperating members, manual movement of one of such members to abnormal position rendering the said means active to prevent shipper release.

In testimony whereof, we have signed our names to this specification, in the presence of two subscribing witnesses.

EDbVARD DANA OSGOOD. ALONZO E. RHOADES.

Witnesses:

HARRY F. PIERCE, F. H. FRENCH.

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