US278804A - Assigsob - Google Patents

Description

(No Model.)

J. M. LINSGOTT. WEFT STQP MOTION FOR. L OOMS.

Patnted June 5,1883.

Inventor.

N. PETERS, Phuko-Lifi-lognpiuer, Wahingum DJ).

' UNITED. STATES;

PATE T OFFICE.

JOI ilN M. LINSGOTT, OF LEWVISTON, MAINE, ASSIGNOR, BY MESNE ASSIGN MENTS, TO HIMSELF AND LEWIS O. PECK, OF SAME PLACE.

W'EFT STOP-MOTION FQR LOOMS.

SPECIFICATION forming part of Letters Patent No. 278,804, dated June Applicatlon filed August-14, 1882.

To all whom it may concern:

Be it known that I, JOHN M. LINSCOTT, of

Lewiston, in the county of Androscoggin, of

the State of Maine, have invented a new and declare the same to be described in the following specification and represented in the ac companying drawings, of which Figure l is a top view, and Fig. 2 a transverse section, of the lay and breast beam of a loom with my improved stop-motion applied thereto. Fig. 3 is a side elevation of the said stop-motion, and Fig. 4 is a front elevation of the portions thereof carried by the race-beam of the lay.

My present invention relates to the kind of stop-motion described in the United States Patent No. 251, 699, granted to Elwood M. Cole, the nature of such invention being defined in the claims hereinafter presented.

. I11 the drawings, A denotes a part of the race-beam, andB a partof the breast-beam, of a loom. Extending nearly across the top of the said race-beam is the stationary grid a, to receive the prongs b of a fork, O, pivoted within a support-piece, D, fastened to the inner face of the race-beam, the same being so as to admit of the fork being turned upward and downward vertically, Fixed on the pivotal shaft ofthe fork is a gear or toothed sector, E, that engages with a toothed rack, F, extending up from and pivotedat its foot to the tripping-pawl H, arranged, as represented, with and pivoted to the support-piece D. Furthermore, there is pivoted to a projection, d, of the pawl H a gravitating arm, 0, which, when vertical or about so, brings up against a stop or abutment, e, formed on or making part of such projection. Attached to and projecting from the breast-beam is a bracket, L, carrying a slide, M, adapted to slide rectilinearly in the said bracket, and provided with a retractive spiral spring, f, fixed to it and the bracket, and arranged in the latter in manner as shown. The slide M has a slot, made through it and arranged in it as represented, there being within such slot and projecting above it an adjustable projection, S, flat oh its top, but inclined 5o therefrom in opposite directions, as shown at useful Improvement in W'eft Stop-Motions for Looms for \Veaving Cloth; and I do hereby (X0 model.)

It and vi, the said projection, at its rear end, extending, as represented at '1 somewhat above the slide. This projection may be permanently fixed to the slide; but it is preferable to have it adapted thereto so as to be adjustable there- 5 5 on lengthwise of it, and to be provided with means of clamping it in position. To this end the projections S may rest on the top of the I slide-bar M, and be held in any position in its slot by means of a clamp-plate extending underneath it and the bar, and secured to the latter by screws. Alongside of the said slide M, and fixed to the bracket, there is an adjustable inclined plane, N, arranged as shown, and there is also fixed to the bracket, and arranged with relation to the slide in manner as represented, an adjustable tripper, P, which comes directly in rear of the gravitating arm 0. The tripper and the inclined plane are held to the bracket by headed clamp-screws, going through long slots in the bracket and inclined planes, each screw having screwed upon it a nut to bear against the tripper or inclined plane. By such an application of the tripper and inclined plane to the bracket, such devices may be adjusted in position as circumstances may re; quire, for all that has to be done to effect such adjustment is to turn back or loosen the nut on the clampscrew, and next move the inclined plane (or the tripper provided with such screw) the requisite distance, and afterward set up or tighten the nut. The slide M extends through the rear part of the bracket, and in practice has applied to it mechanism for tripping the loomshipper, so as to stop the loom on an advance 8 5 of the slide taking place when no weft-thread may be across the grid. Such mechanism for tripping the shipper is the same, or substan tially like that for the purpose, which is employedwith the slide, as represented inthe United States Patent No. 263,292, granted to me.

I would observe that in my improved stopmotion, as hereinbefore described, looping or corrugating of the weft or filling thread by the fork while the lay is beating up is prevented, such being injurious to the cloth when woven, as is well known to weavers. Instead of the fork, all the while the lay is beating up, resting upon the thread and pressing it down 10o between the bars of the grid so as to loop or corrugate it, such fork will be forced upward off the thread immediately after falling upon it by the action of the incline i of projection S, and will be kept off it until advanced by the lay far enough to drop clear of it when it (the said fork) may next fall.

The operation of the stop-motion may be thus explained: While the weaving of a piece of cloth is progressing and the weft-thread carried by the shuttle through the shed of the warps and across the race-beam and the grid remains unbroken, the prongs of the fork cannot fall down into the grid, as they will rest upon the thread laid upon the grid 5 but should suchthread become broken and not extend across the grid, the prongs will fall into and below the latter. On such falling of the prongs taking place the pawl H will be depressed to an extent to cause it during the beating up of the lay) to at its endbe carried into contact with the rear end of the projection S at the foot of the incline 1', in which case the pawl, in continuing to advance, will move the slide M forward, so as to effect a stoppage of the loom. As the slide M may be driven forward by the pawl the latter will meet and rise on the inclined plane N, and by such will be forced upward out of engagement with the projection, so as to allow of the slide being retracted by its spring, the pawl passing over the projection as the latter may be drawn backward. In an advance of the lay toward the breast-beam the gravitating arm will be carried in contact with and will pass acrossandbeyond the tripper; but in a retreat of the lay such arm will be drawn against the tripper and will bring up against the abutment 0 and be arrested by such abutment. In passing across the tripper the gravitating arm will thereby be forced upward, so as to press upward the pawl H in a manner to cause the prongs of the fork G to be thrown upward relatively to the grid, and be kept up while the gravitating arm may be 011 the tripper, in order for the shuttle to pass. without contact with the fork.

From the above it will be seen that in carry-- ing out my present improvement I have not only dispensed with a lever provided with a toothed sector to engage with the toothed sector of the fork, as is shown in. the patent of said Cole, but I have directly combined with the pawl H, in manner as described, the gravitating arm 0 and the abutment e also, that I have dispensed with the catch-lever shown in said patent as pivoted to the slide carried by the bracket projecting from the breast-beam; also, that I have provided the bracket with v the inclined plane N and the adjustable tripper 1, and the slide M with the adjustable projection S, all of which differs both in con struction and operation from what is shown in the said patent. Therefore,

\Vhat I claim as myinvention-in the abow'edescribed stop-motion is as follows, viz:

1. The pawl H, provided with theabutment e, the gravitating arm 0, pivoted to the said pawl, the fork C and the rack F, and toothed sector E, adapted to the fork and pawl, as set forth, in combination with the tripper P and its sustaining-bracket L, substantially as de-' scribed.

2. The projection S, applied'to the slide M, and the inclined plane N, applied to the bracket L, in combination with such bracket and slide, and with the pawl H, the fork C, and means of connecting the said fork with the said pawl, all being adapted and to open ate essentially as set forth.

3. The combination of the pawl H, having the abutment c, the gravitating arm 0, applied to the said pawl, the fork C, and means for connecting the said pawl with the said fork, with the tripper P, the bracket L, having the inclined plane N applied thereto, and the slide M, supported by said bracket and having the projec s tion S applied to it, (the said slide,) all being substantially as described.

JOHN M. LINSCOTT.

Vitnesses R. H. EDDY, E. B. PRATT.

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