US1381636A - Bobbin-smash preventer for weft-replenishing looms - Google Patents

Description

T. HAWORTH. BOBBIN SMASH PREVENTER FOR WEFT REPLENISHING LOOMS.

APPLICATION FILED MAY 17, 1920.

Patented June 14, 1921.

Wain/e35.-

UNITED STATES PATENT OFFICE.

BOBBIN-SMASH PREVENTER FOR WEFT-REPLENISHING LOOMS.

Application filed May 17,

To all whom it may concern:

Be it known that I, THOMAS I-IAwoR'rH, a subject of Great Britain, residing at Fall River, in the county of Bristol, State of Massachusetts, have invented a certain new and useful Improvement in Bobbin-Smash Preventers for Weft-Replenishing Looms, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention'is designed for application to looms of the class in which weft-replenishmentris effected automatically through replacement of the spent filling-carrier or bobbin occupying the working shuttle on the lay by a fresh filling-carrier or bobbin transferred to the shuttle from a magazine containing a supply of reserve filling-carriers or bobbins.

The general aim of the invention istoprovide-improved means for preventing bobbin smashes. The term bobbin smash applies to the breakage of warp-threads caused in the flight of a shuttle across a loom, by a filling-carrier or bobbin which projects above the top of the shuttle instead of being completely housed within the latter.

- Such accidents occur in bobbin-changing weft-replenishing looms as a result of failure of the transferring devices to insert the fresh filling-carrier or bobbin properly into the shuttle at the time of making a transfer, or of a failure of the holding springs of the shuttle to keep the filling-carrier or bobbin in its proper place Within the shuttle. The outcome of such failure is that when the shuttle is picked from the shuttle at the replenishing side of the loom toward the other side of the 100m, through a shed in the warn-threads, breakage of the warp-threads results from the engagement of the upstanding head therewith.

. The invention consists,firstly, in a bobbinsmash preventer for bobbin-changing weftreplenishing looms comprising a shuttle-lock Specification of'Letters Patent.

Patented June 14,1921.

1920. Serial No. 381,956.

gaged with the look from being swung downward through the bottom of the shuttle 1n consequence of such engagement, and operating to arrest the inwardly-moving shuttle before it has passed into the shed in the warp-threads. By such arrest of the shuttle, injury to the warp-threads is prevented. The described location of the lock avoids liability of the loom to become pickbound, and thereby guards against tendency to straining or breakage of the parts.

The invention consists, secondly, in the revoluble lock and filling-carrier or bobbin depressor which is described hereinafter.

The features of the invention are illustrated in the drawings, in which latter,

Figure 1 is a front elevation of portions of the lay of a loom having said features applied thereto, showing also portionsof the picker sticks, the middle portion of the lay being broken out. 7 a

Fig. 2 is a partly sectional plan view thereof.

Fig. 3 is a sectional detail on a relatively enlarged scale. 7

The drawings show portions 1,. 1, of a loom lay-beam, a shuttle 8 at the replenishing or magazine ide of the. loom, and a filling-carrier 0r bobbin 9 in connection with said shuttle, having thereon a full load 10 of weft or filling. 2, 2, are the front-plates of the shuttle-boxes at the two ends of the lay; 3, 3, are the shuttle-boxbacks, and 4, 4;, are the lips projectingv forwardly from said backs and constituting the shuttle-box tops; 5, 5, are the picker-sticks at the opposite ends of the lay, and 6, 6, arethe pickerscarried by the said picker-sticks. 7, Fig. 1, is the slot or opening through the lay-beam at the replenishing or magazine side through which spent filling-carriers or bobbins expelled from the shuttle in the performance of the replenishment drop into the usual catcher-box, not shown.

The shuttle 8 is represented in Fig. 2 fully home within the shuttle-box at the replenishing or magazine side. of the loom, which is the position it occupies at the time replenishment is effected by inserting into the open top of the shuttle-body a filling.

carrier or bobbin 9 supplied with a load 10 of weft or filling, and expelling the spent filling-carrier or bobbin through the open bottom of the shuttle-body. .In such position of the shuttle, its open bottom is over ishment, and thereby the shuttle will be .back 3 ofthe said shuttleboX.

the lay-beam opening 7 and the latter filling-carrier or bobbin is free to fall through such opening.

' The look a is located adjacent the inner end or mouth of the shuttlerbox at the replenishing or magazine side of the loom. In the preferred form of embodiment shown .in the drawings it comprises a sleeve a which is revolubly mounted upon a supporting stud a projecting forward from the The said lockis mounted at such a height above the "shuttle-race that it just clears the top of the shuttle as the latter slides below it in being picked back and forth across the loom. lVhile the filling-carrier or bobbin carried by the shuttle occupies its proper position.

within the shuttle, wholly below the top surface of the latter, the movements of the shuttle will not be obstructed by the look.

If, however, the head of the filling-carrier extends up above the top surface of the shuttle, as in Fig. 1, as sometimes it does following the replenishingoperations, the upstanding head will engage with the lock as in Fig. 1 in the first pick following replenarrested in its movement from the replenisha ing side of the loom toward the opposite side before it has entered the shed in thewarp-threads. -To insure stoppage of the shuttleas a result of engagement of the lock with the upwardly projecting head of the fillingcarrier or bobbin, I make provision for preventing the look from expelling the filling- -.carrier or bobbin from the shuttle or causing it to project below the shuttle. The tendmay of such engagement is to cause the barrel and tip of the filling-carrier or bobbin to swing downward through the open botbecomes pick-bound, with a tendency to' tom of the shuttle. When that happens in practice, it frequently results that the filling-carrier or bobbin is trapped between the eye-end of the chamber within the shuttle-body' and the inner end of the opening 7 through the lay. This arrests the movement of the shuttle sometimes before the picker-stick and picker have completed their inward picking movement, so that the loom breakage of picker-sticker picking tappet nose. To prevent suchfaction fromtakingplace, I locate the lock at such a distance;

inward beyond the inner end of the laybeam opening 7 that the shuttle is allowed to move with the picker far enough to carry its contained filling-carrier or bobbin over the portion of the lay-beam intermediate said inner end and the look before the engagement takes'place. Such portion being beneath the shuttle; at the instant when the engagement of the lock with the head takes place, it will prevent the filling-carrieror bobbin from being swung downward so as to What is claimed is,-

cause it to partly projectthrough the bottom of the shuttle. This location of the shuttle-lock obviates breakage or other injury ofthe picker-stick and its actuating devices, because the action of the picking tappet in producing the movement of the pi ker-stick inward ceases before the movement of the shuttle is arrested in consequence of engagement of the head of the filling-carrier with the lock. Usually, when the engagement of the head of the fillingcarrier or bobbin with the lock occurs, the shuttle moves relative to the fillingcarrier or bobbin until the threader-block or a portion of the wood of theshuttle at the corre though it may be made of brass orthe'like composition, or of wood.

.An important advantage of a revoluble lock is that it will turn incase the shuttle rises so as to make contact with the surface of the stop; thus I avoid what'is known asa short pick resulting from friction against the lock, and which would be followed by the loom banging off on the return pick. The lock by revolving operates in improved manner to guide the shuttle properly into the box in case the shuttle should have been thrown too'high'.

From the foregoing it willappear that by preventing the bobbin'from being wholly or partially ejected from the shuttle through the action of the lock, 2'. 0., by compelling the bobbin toremain within the chamber of the shuttle, the lock acts to arrest both the bobbin and the shuttle, and thereby prevents them from entering the shed, while at the same time I safeguard against breakage or injuryin the case of the picker stick and other parts of the picking mechanism. 7

I contemplate in some cases employing also a revoluble device such as aforesaid, as

at 6?, at the mouth of theshuttle-b'ox at the opposite side of the loom from that atwhich the magazine is located. 1 In the case of such employment, the device will act as a lock or depressor in connection with an elevated filling-carrier tip.

1. A bobbin-smash preventer forbobbinchanging weft-replenishing looms, comprising a shuttle-lock combined with the shuttle box at the replenishing or magazine'side of a loom andadapted to engage a filling-carrier head standing up above the top of the inwardly-moving shuttle, located at such a distance inward beyond the lay-beam open- I contemplate making it ing through which filling-carriers ejected by the replenishing operations descend that the intermediate portion of lay-beam beneath the shuttle will prevent the filling-carrier engaged with the look from being swung downward through the bottom of the shuttle in consequence of such engagement, and operating to arrest the shuttle before it has passed into the shed in the warp-threads.

2. In a weft-replenishing loom, the com bination with the lay and a shuttle-box thereon, of a revoluble stop and depressor device lo'cated adjacent the shuttle-box mouth and adapted to engage a filling-carrier projecting above the top of the shuttle at such a distance inward beyond the lay beam opening through which filling carriers ejected by the replenishing operations descend that the intermediate portion of lay beam beneath the shuttle will prevent a filling carrier that is positively engaged and held by the stop from being swung downward through the bottom of the shuttle in consequence of such engagement, the said stop adapted to arrest the shuttle before it has passed into the shed in the warp-threads.

In testimony whereof I aflix my signature in presence of two witnesses.

THOMAS HAWORTH. Witnesses:

NATHAN B. DAY, ELLEN 0. SPRING.

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