US267778A - Setts - Google Patents

Description

(No Model.)

' G. CROMPTON & H. WYMAN.

LOOM.

No. 267,778. Patented Nov. 21,1882.

fizz/673 55715, W26, 6 670196 wan 520 ,7 I 7 me @mw UNITED STATES GEORGE PATENT OFFICE.

OROMPTON AND HORACE WYMAN, OF VVOROESTER, MASSACHU- SETTS; SAID WYMAN ASSIGNOR TO SAID OROMPTON.

LOOM.

SPECIFICATION forming part of Letters Patent No. 267,778, dated November 21, 1882.

Application filed December 9, 1881.

' on the filling, according to the character of the weaving and the material used.

This invention is particularly applicable to silk-looms wherein the fabric is to have transverse stripes denser than other portions thereof. The reed is held ina frame pivoted upon the lay, so that the bottom of the reed may yield to the blow of the dents of the reed against the filling. In this invention the bottom of the reed is held pressed forward by the arms of a rock shaft or lever acted uponby a spring, and in connection with this lever we have provided one or more pressure-augmenting spring-held levers adapted to be automatically actuated by pawls connected by cords with and under the control of any usual jacquard, so that the force of either or both of the said pressure-augmenting levers or devices may be removed from the main lever, which directly acts upon and holds the bottom of the reed, whenever it is desired to have the reed yield to a resistance less than that jointly exerted by the main lever and the pressure-augmenting levers, which co-operate with it.

Figure lrepresen ts a vertical cross-section of a sufficient portion of a loom to illustrate our present invention, the lay being shown in full lines in its backward position, and in dotted lines as having been moved forward to beat up the filling, one of the pressure-augmenting levers being shown in the latter case as rendered inactive by the hook in engagement with it. Fig. 2 is a rear elevation of Fig. 1, with the addition of a small part of the lay and reed at the opposite end of the loom, to show the manner of holding the bottom of the reed at that end of the loom; and Fig. 3, a detail showing a portion of a jacquard-head.

(No model.)

The lay A of the loom, of usual construction, has a reed, a, held in a frame, b, pivoted upon the lay at 2, so that the lower end of the reedframe and reed may recede when the pressure and blow of the reed on the filling are in excess of the amount desired for the material being woven. The bar a forming the bottom of the pivoted or receding reed-frame, has, as herein shown, lugs a, which are entered loosely into grooves at the upper ends of the arms of a rock shaft or lever composed of the shaft 0, held in'bearings 3 on the lay, and arms 0 0 The shaft 0 has upon it a spiral spring, d, one end, 12, of which (see Fig. 2) bears against the lay or the plate carrying the bearing of shaft 0, while the other end of the said spring is connected with the collar (2, adjustably secured to the said shaft 0 by a screw, 13, the collar being adjustable to give to the said spring more or less tension, and consequently regulate the strength of the blow of the reed when arms 0 0 are held pressed forward'only by the spring at, which, by its tension, regulated as herein pro vided for, will determine the minimum strength of the blow to be struck by the reed.

In some classes of goods it is desirable at different portions of the lengthof a fabric to beat up the filling more orless compactly, and to be able to do this automatically we have added to the devices thusfar described-viz., the shaft 0 and its armsc 0 all of which are commoncertain pressure-augmenting devices, (shown as levers c c,) which are supported on asuitable rod held in a bracket, 5, on the lay-sword, so that their upper ends are pressed against the end of the lower arm, 0, of the main-lever contrivance, as we denominate the parts 0 c 0 Each of these levers c e is under the control of a spiral spring, e one end of which is connected with the said lever, while the opposite end of the spring is attached to a collar, 6, which may be turned to control the power of the said spring, and be held in adjusted position by the screw 14. The levers 6 a normally occupy the position shown by the lever e, Fig. 1. The maximum pressure or blow of the reed will be exerted when both of the levers e c are left free to bear against the lower arm, 0, and augment theaction of the spring d on the main lever and through it on the reed-frame. Each lever e e at its lower end is provided with a projection adapted to be engaged by one of the pawlsfor f, pivoted on a stand,f properly bolted or secured to the loom-frame, f whenever either of the said paWls is permitted to descend into the range of movement of the projection of the lever e or 6, next to it, as the lay is being moved forward. Either of the levers e or 6 may be so engaged as the lay is being moved forward and be turned to remove it from contact with the arm 0, thus decreasing the effective pressure on the reed by the amount of pressure exerted by one of the springs 0 or both of the said levers e a may be so removed as the lay carries the reed against the filling. lhese pawls are joined with cords g g, which are intended to represent the common liftingcords of any usualjacquard-head, J, (see Fig. 3)-such, for instance, as shown in United States Patent No. 50,993one of which heads will be supported upon usual standards rising from the loom-frame, and will raise the said cords at the desired times designated by the v usual jacquard pattern, barrel, or prism, t, the said cords, when not held up by the common trap-board or griff of the jacquard, being pulled down by the weight of the pawlsff, they acting on the cords g g as do the usual weights in usual jacquards.

We claima The lay, the pivoted or receding reed, the main lever, and means to keep it pressed forward at its upper 'end, combined with one or more independent pressure-augmenting devices, and pawls to operate them at the desired times to change the effective pressure of the reed against the filling, substantially as set forth.

In testimony whereof we have signed our names to this specification in the presence of 40 two subscribing witnesses.

GEO. OROMPTON. HORACE WYMAN. Witnesses:

J. B. SYME, H. L. ADAMS.

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