USRE9610E - Weft-stop-motion for looms - Google Patents

Description

x G. URO-MPTO N.

Weft Stop Motions for Looms.

No. 9,610. Reis sued March 22,1881.-

NJEIERS. PNDTO-LITHOGRAFNER. WASNINGTON, D. c

To all whom it may concern:

Be it known that I, GEORGE ORoMProN, of Worcester, in the county of Worcester, State of Massachusetts, have invented an Improvement in Weft-Stop-Motions for Looms; and I do hereby declare that the following, taken in connection with the drawings which accompany and form part of this specification, is a description of my invention sufficient to enable those skilled in the art to practice it.

The invention relates to mechanism for automatically stopping a loom of the Orompton class whenever the shuttle or Weft-thread breaks.

In this my invention I have pivoted upon the lay two gravitating grids having prongs extended horizontally across the raceway of the lay, the tail-pieces of the grids being suffioiently heavy to keep their pronged parts elevated. I have also pivoted upon and at the rear of the lay two weft-feelers having horizontal prongs extended across the raceway of the lay above the grids, and at the rear of, but independent of, the lay I have located or placed means to act upon the tail pieces of the weft-feelers during the forward movement of the lay to move the forked ends, of the said feelers downward toward the grids.

By moving the weft-feelers down and toward the race of the lay, rather than upward, I am enabled to keep the weft down upon those warps nearest the race of the lay; and the weft, when beaten up by the reed of the lay, is moved forward horizontally, or nearly so, directly to the cloth-making point with the least amount of friction.

I have placed a grid and feeler at each end of the lay, and have provided means for operatin g both feelers at every pick, which makes it possible to readily detect a break in the shuttle-thread at either side of the web being woven. A shuttle moving from a box at the right-hand end of the lay into a box at the left-hand end of the lay has its shuttle-thread felt for outside the left-hand selvage, and a shuttle moving from a box at the left-hand side of the lay to a box at the right-hand side of the lay has the thread felt for outside the right-hand selvage. If a shuttle passes through the shed from either the right or left hand side of the lay and immediately returns in the next shed, it is obvious that the thread UNITED STATES PATENT OFFICE.

GEORGE OROMPTON, OF WORCESTER, MASSACHUSETTS.

WEFT-STOP-MOTION FOR LOOMS.

SPECIFICATION forming part of Reissued Letters Patent No. 9,610, datedMarch 22, 1881.

Original No. 69.974, dated October 22 1867. Application for reissue filed February 2, 1880.

of that shuttle will not be extended over the grid at that side of the warps into which the shuttle started on its return movement; and consequently, if means were not provided for such emergency, the weftfeeler coming down upon the grid outside at that edge of the warps, it not having a thread laid across it,

would stop the loom, although the shuttlethread was not broken.

1 have herein shown the weft feelers at both ends of the lay as being operated at the same time, each one descending toward the grid under it after each pick, and the two feelers are operatively connected in such manner that the belt-shipper cannot be moved to stop the loom, except when the shuttle-thread is wanting above both grids; or, in other words, the absence of the weft from that grid at that side of the warps from which the shuttle started in its flight through the shed will not alone be sufficient to stop the loom.

Figure 1 represents in plan view a sufficient portion of a loom to illustrate my invention, the usual shuttle-boxes at each end of the lay being omitted from the drawings; Fig. 2, a vertical cross-section of Fig. 1; Fig. 3, a front view of the lay-beam; and Fig. 4, a sectional detail taken through the lay and breast-beam, showing the grid and feeler in side view, the feeler being elevated.

a denotes the loom-frame; b, the lay common to the 'Orompton or other fancy loom, the lay being driven by the shaft 0, in the usual manner. 0 is the lay-beam over which the shuttle flies; d, the breast-beam.

At the front face of the lay-beam c, and near each end thereof, I have placed a slotted slideplate, 6. The slide-plate e, suitably supported at the front of the lay, is slotted at each end, and each slot receives a tooth, g, of one of the carriages p, the said teeth being extended through the lay-beam a into said slots. The slide-plate e is connected by a pin, a, with a rockenplate, k, hung upon a pin, 1, of the lay. The rocker-plate has a hole, m, which at every forward movement of the lay (when the'weftthread is unbroken) is maintained in position to be entered by a pin, a, of the shipper-lever 0. When the lay beats up, if the rocker-plate varies at all from its normal position just referred to, the pin 01., instead of entering the hole m, will be struck by the face of the said plate,

. sion of the grid is located at the rear of the lay. The tail-piece of each grid is provided with a projection, t, and each carriage is held pushed forward by means of a spring, 10. The

feelers 'v, pivoted at 20 upon standards or arms it carried by the lay, have prongs :20, located above the grids and projected forward across the lay toward the breast-beam. The tail-pieces y of the feelers, extended backward from the lay, are weighted at z to hold the prongs m normally in elevated position; but as the lay beats up the curved lower sides of the tail-pieces y strike a stud, a, extended in from a bracket, 0, supported on the loom-frame a, tipping up the rear end or arm of the tail-piece y and carrying the prongs of the grid into the laybeam 0.

Each weft-feeler has an arm, 4, provided with a pin, 5, which, as the lay moves forward, strikes the pin t of the grid below it, provided the prongs of the feeler, in their descent toward and through the spaces between the prongs of the grid 8, do not strike a weft-thread. Should a weft-thread be present on the prongs of the grid, the latter will be depressed, and its tailpiece will be elevated sufficiently to 'place the pin t out of the line of movement of the pin 5 ofthe armt of the feeler. When a pin, 5, of a weft-feeler at oneend of the lay is permitted to strike a pin, t, the weft-feeler and carriage or slide 19, on which it is pivoted, will be drawn backward to remove the finger g of that carriage from the opening in the slide-plate e in which it extended; but it will be noticed that the said slide-plate cannot move longitudinally and let the plate 70 drop by removing but one finger, g, for the other finger, yet in engagement with the slide-plate at its opposite end, will prevent longitudinal movement thereof.

Should a shuttle be thrown across in one shed and back in the next shed, it would not leave a thread extended across that grid at that end of the lay from which the shuttle last started, and, as described, if the grid and carriage at that side are drawn back the loom will not be stopped. a

It will be noticed that the teeth g at each end of the lay must be drawn back from both slots of the slide-plate 0 before it can be moved longitudinally to permit the plate k to drop and operate the belt-shipper handle and stop the loom, and this can only be done when the X weft is absent from above both of the grids.

I depend for the release of the shipper handle or lever upon the absence of weft from above both grids, as the feelers, operated at every 6 pick, descend to the level of the grid. When,

in the operation of the loom, two shuttles are thrown in succession from the same end of the lay, the weft-feeler at the opposite end of the lay, it being operated at each pick, prevents the 100m from being stopped.

In my loom each grid moves independently of the other, and is located just below the level of the race of the lay, and is so balanced as to be sensitive to the finest felling; whereas, if both grids were connected, the weft must be strong enough to move both grids and the connections between them under the action of the feeler.

It will be noticed in this my invention that both the grid and feelerare pivoted upon and moved with the lay; that the grid serves as a yielding support for the weft laid upon it that the main parts of the weft-stop mechanism are kept at the back of the lay, so as to be out of the way, and that there is a grid and feeler at each end of the lay, each connected with the other and with the belt-shipper, so that the loom is especially designed for operation where {here are drop-shuttle boxes at each end of the By pivoting the grid upon the lay I am en a bled to secure most delicate action of the feeler andvgrid, adapting the devices to the lightest zontally across the raceway of the lay, the tailpieces of the grids being sufiiciently heavy to keep their pronged parts elevated, two weftfeelers having their pivots at the rear of and made movable with the lay, and having horizontal prongs extended across the raceway of the lay above the grids, combined with means located at the rear of, but independent of, the lay to act upon the tail-pieces of the weft-feelers during the forward movement of the lay and move the forked ends of the weft-feelers downward toward the grids, such combination enabling the weft-feelers to keep the weft down upon those warps nearest the race of the lay, and permitting the weft to be moved horizontally forward, or nearly so, to the cloth-making point with the least amount of friction between the warp and weft and the grid, substantially as described.

GEO. OROMPTON. Witnesses:

J. B. SYME, J. A WARE.

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