US172097A - Improvement in looms - Google Patents

Description

J'. C. DUCKWORTH.

LOOM.

Patented J"a.n.11,1876.

N PETERS, PHOTO-LITHOGRAPHER, WASHINGTONv u 0.

UNITED' STATES PATENT DFFIGE JOHN C. DUCKWORTH, OF NEW YORK, N. Y., ASSIGNOR TO E. S. HIGGINS &'OO.,OF SAME PLACE.

-|MPROVEMENT IN LOOMS- Specification forming part of Letters Patent No. 172,097, dated January 11, 1876; application tiled June 11, 1875.

scription of the same, reference being had to the accompanying drawing which forms part of this specification.

This invention, although applicable to shuttle-looms of difl'erent descriptions, is more especially advantageous with looms having changeable shuttle-boxes. The invention comprises an independent sh Little-raceway, in combination with a vibrating comb.and lay, for beating up the filling.

The invention consists in a combination, for

' giving a double beat, of a crank and toggle motion with a combined comb and lay made independent of the shuttle-boxes and raceway. I

The invention also consists in-a cam-andlever motion, in combination with the comb and lay, said motion lifting the comb, when back, to enter the warp, behind the fillingyarn, after which it is carried directly forward, thereby taking the comb through the warp without unnecessary friction.

In the accompanying drawing, Figure 1 represents a plan of 'a loom in part, having my invention applied, and Fig. 2 a vertical sec tion of the same, indirection of the length of the Warp.

A is the breast-beam, B the raceway, and G the reed, all of which are or may be stationary, as also the shuttle-boxes D 1), with provision, it desired,-for substituting other shuttle-boxes, when changeable shuttle-boxes are used. In all cases, however, the raceway and shuttle-boxes are independent of the lay E. This lay has combined with and mounted on it a comb, F, which beats in common with the lay, and receives the warp b between its dents, but is distinct from the reed. Said comb and lay are vibrated backward and forward to separate the warp b and beat up the filling 0, by means of devices which give a double beat each forward stroke or single revolution of the driving-shaft G, the advantage of which double beat in driving home the filling is well understood. The means here represented for this purpose consist of cranks H, connecting-rods I operated by said cranks, and toggle bars or levers J K, receiving an up-and-down motion from said rods, and attached at their outer ends, respectively, to the la at d, and a fixed fulcrum, 6.

By this arrangement or combination of devices, not only is the lay with its attached comb vibrated backward and forward, as required, but the same has a doublebeat when working up the'filling by the reverse flexing and straightening ot' the toggle-bars twice during each revolution of the driving-cranks, and the comb and lay work in proximity with the breast-beam. The lay and comb have also an up-avd-down movement by means of cams L on the shaft G, and arranged to act on bell-cranks or levers M, to which the lay is jointed below, said levers being held up to working contact with the cams by one or more springs f, and the cams and levers operating to lower the comb when moving toward the shuttle-race, and to lift it when, or shortly before, and while, working forward or away from the race. a

By the use of the combined comb and lay, in combination with an independent raceway and shuttle-boxes, there is a great advantage in the application of the same to looms having changeable shuttle-bo xes, including looms for weaving carpets, or other looms for working different-colored yarns, inasmuch as by my arrangement or combination the lay has much less to carry than when the shuttle-boxes and raceway are attached to it.

There is also another advantage, and which applies to all or different kinds of looms, and that is, by reasonot' the independent or stationary relation of the raceway and shuttleboXes, the shuttle may be completely thrown in the wide part of the shed, and entirely independent of the position of the lay. Thus it may -,be thrown while the lay is working back. If from any cause the shuttle should stop on the raceway it will not break the warp.

The comb F, too, which not only vibrates between the breast-beam and raceway, but also has a rising and falling motion, as described, to clear the shuttle-thread when approaching the raceway, and to rise behind it when or before vibrating forward again, or away from the raceway, is much easier on the warp than is a reed carried by the lay. Thus the comb Edoes not chafe the warp to the same extent, inasmuch as it does not leave and enter all. the warp at onc but only enters the upper part of the yarn after it has passed through the lower part; nor does the comb in its vibration backward and forward require to move .to the same extent as an ordinary reed that 1s, it need not move as far back, consequently its wear upon the yarn is very much less. Thinner dents likewise may be used in the reed G, inasmuch as all that said reed has to do is to separate the yarn, the comb and lay doing the beating up.

When the raceway and shuttle-boxes move with the lay, the filling is slackened by the coming forward of the lay, thereby making a slack selvage. This effect cannot take place in a loom which is constructed to operate as I have here described, as clearly shown by full and dotted lines, for the filling-yarn 0 in Fig. 1 of the drawing; but the filling is always kept tight when beaten up, and 'a tight selvage is consequently insured.

I claim 1. The combination, with the comb F and lay E, which are independent of the shuttleboxes and raceway, of one or more cranks, H

7 on a revolving shaft, G, one or more rods, 1

and the toggle bars or levers J K, essentially as and for the purpose herein set forth.

2. The combination, with the independent lay and comb, of the cams L and levers M, substantially as and for the purpose specified.

JOHN G. DUOKWORTH. Witnesses:

W.-O. WRITER,- JNo. 0. GOODRICH.

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