US103600A - Improvement in loom - Google Patents

Description

naar smet @anni mijn.

CHARLES W.GILBERT, 0F WORCESTER, MASSACHUSETTS.

Letters Patent No. 103,600, dated May 31, 1870.

IMPROVEMENT IN LOOM.

The Schedule referred to in these Letters Patent and making part of the same.

scription thereof, reference being 'had to the accompanying drawing forming par't of this specication, and in which- Figure 1 represents .a front viewof so much o f. a loom as is necessary to illustrate my present improvements;

Figure 2 represents a top or plan view of the same.

Figure 3 represents a section on line AIB, lig. 2;

Figure 4 represents a rear view; and s Figure 5 represents a view of the right-hand side of the loom, shown in fig. 1. Y f

To enable those skilled in the art to which my invention belongs to make and use the same, I will describe it more in detail.

My invention or improvement relates to the combination with the bottom cross-girts of central sup-l ports, as hereafter explained.

A A are the side pieces of the loom-frame, which are secured together hy meansof the cross-girts B B.

To the top of the side pieces A A are secured the cross-pieces C C.

-The slides or travelers D work upon supporting bars a connected with Ithe top'pieces C G, and have the double hooks E pivoted or hinged to them, in the'same" manner as the corresponding parts in Bleakies loom, for which he is about to apply for Letters Patent.

The harness-barslor knives F rest upon projections b upon the tops of the cross-pieces C', and are heldin place by removable guide-pieces e c'.

From the piece c an arm, d, projects forward and upward, and terminates inT-shape, as shown in fig. 2.

To the ends e e of arm d are hinged the front. upwardly-curved ends of the harness-bars or knives F, as shown in gs. 2 and 5. f

The opposite ends of the harness-knives or bars project back of the top cross-piece C, and are provided with slot f through which pins project from the three-armed lever G, which is pivoted at 1 to a stand, 2, secured to the back cross-piece G. v

The central arm of lever G is connected to the bellcrank or lever H bythe hinged connection I.

The bell-crank lever H is connected to crank J on I the end ot shaft K by means of a hinged wrist-piece, lt, and two pieces L L', the latter beingprovided with aseries of holes, 3, as indicated in fig. 4, (or a that may be used for that purpose,) whereby the conne@ tion can be lengthened or shortened at pleasure'.

The crank J should be provided with a slot, so that wrist-pin 4 can be moved in and ont as the connection L L is lengthened or shortened.

The joined ends of the parts L L being enlarged and flattened, as shown in the drawing, a very strong and still` connection is formed.

In wide looms, complaints have been made that thel frames are liable to sag or spring down, thus impairing and seriously a'ecting the proper action of the looms;

To remedy such diculties', I have introduced auxiliary supporting steps M, which, in this instance, are fitted to slide upon the lower girts B, the ends of the cross-piece N b'eing fastened to the tops of such steps.

By this arrangement, it will be seen that the ends of the cross-piece N are supported directly from the steps M, which in turn are so arranged that they rest upon the door underneath the front and back girts-B.

While, therefore, the Vsteps are brought directly,for nearly so, under the frontand back cross-girts, thereby economizing room, they, at the same time,` are so combined with the ends of the cross-girt as to give direct support to that, and near each end thereof.

The upper parts of the harness-frames Q are con-v nected to the inner ends of the slides or travelers D by means of flattened Wires m, which pass over rolls or sheaves n,while the lower parts ofthe harness-Y frames are in like manner connected to the outerends of the slides or travelers D by means of flattened wires' '0, whichpass down under rolls or sheaves p supported' andvturniug on journals in the arm-pieces P,fastened tothe cross-beam or piece N, thence under rolls or sheaves t, supported in arms fastened to the side of the loom-frame; thence up and over sheaves or rolls s to the outer ends of-the slides or travelers I), to which they are properly secured.

Flattcned wire for connecting the harness-frames with the slides or travelers, is an improvement over cords and straps. It' is strong, light, runs easily, and retains a uniformity of tension, which is a great desideratum. v

lI prefer to use tempered wire, the ends of such wire having the temper drawn, to facilitate the attach-- lies on the convex side must be expanded, while the successive parts of the cylindrical wire are bent over the pulley, and-when many wires'are used, the aggregate strain thus produced becomes very considerable.

Another defect is that this expanding and compressing action causes the crystallizing of the ,'metal sooner orlater, and thus units it for use.

With the attened wire no ne of these, defects are noticed. It bends much more easily than the other, and thus produces less strain, while, owing to its ilat, thin form, there is no compressive action, and the quality of the metal is not impaired.

Byarranging theharness-bars or knives across the top -of the loom, and turning or curving up their front projecting ends over the breast-beam S, as shown in the drawingLI ain able to obtain the desired motion to saidbars to give the necessary elevation and depression to each harness, whereby all of the threads ibi-ming a single shed, will stand upon the same angle irrespective of the number of harnesses which may be depressed or raised to form such shed, and that, too, without the intelposition of levers or connections bctween the slides or travelers D and the wires which connect the same to their respective harness-frames;

By the elevation of the front projecting ends of the harness-bars or knives, they do not incomrnode the operator, while at the same time they and the arm d -atford very convenient supports for the suspension of mending or piecing threads.

' When the crank-shaft K is put in motion, "the three-armed lever Gwill be rocked `back and forth, thereby alternately spreading and closing the rear ends of the harness-knives F for opening and closing the harnesses, the double hooks E being operated upon by. means of indicator-levers.

Having thus described my improvements in looms,

lVhat I claim therein as new and of my invention, and desire to secure by Letters Patent, is

1.'The arrangement of central steps under the front and back-girts of the loom-frame, and in combination with and supporting the cross-giri; near its ends.

2. v'lhe combination with the front and back girts B of the steps M, substantially as shown and described.

- CHAS. NV. GILBERT;

Witnesses THos. H. DODGE, ALBERT E. IEIRCE.

Images