US7936A - isaac h - Google Patents

Description

.UNITED STATES PATENT orrrcnasaltos. oansnrsonifon omniown. .i

`Specication of Letters Patent No.`7,936,

frame with those port-ions of the loom to which my improvements are applied; Fig. 2 is a vertical transversesectionof the same, and` Fig. 3 is a plan with certain portions removed to show more clearly the construction and operation of the loom.

\ My invention consists first in effecting the movement of theheadles by a motion de-` rived fromithe lay throughthe intervention of a cam shaft and treadles or their e`quiva`` lents, the irst of which is made to revolve by means of a ratchetwhich is put in motion by the lay and acts upon ratchet teeth secured to the camshaft; andA second, in effecting the throwing ofthe shuttle by a motion derived from the lay,`by means of a pair of levers whose arms are connected with breast beam and shuttle drivers.

In the accompanying drawings A A is the frame of the loom and B is the breast bea-1n. Two standards C `C are erected upon the side rails a a of the loom frame and are connected at their upper extremities by the treadle bearer D; the latter is perforated to admita pair of sheaves over which the cords b are passed from which the upper headle shafts d fl are suspended. The lower headle shafts c c of each set is connected by cords z' d with a pair of levers or marches f f which are pivoted at their hinder extremities to the opposite sides of the loom frame. The front extremities of the marches are operated by cams c which are proj ectedin alternate pairs corresponding with the pairs of marches from the barrel ofa transverse cam or tappet shaft E whose gudgeons are supported in brasses allixed to the side rails of the loom frame. This cam shaft is furnished with a series of ratchet teeth j corresponding in number with the cams at each end ofthe shaft. A ring block G is constructed to turn .by a rcord s with the breastbeanr i upon thel cam Lshaft the direction indicated by the arrow'mpin the drawinggthe block is fitted rwitha spring ratchet 7c which` engages with the ratchet teeth on thecarnV shaft and is connected by means of astrap or cord Z` with the back of the lay; the arrangement of the several parts `of this device being such` that as `the lay is drawn toward the breast beam `B the weight K `acting through the cord Z turnstheblock in the direction indicated by the arrow m in Fig. 2,

. and the lratchet la leavingyzthe tooth with which it `is in contact slips o-ver thebarrel of the shaft E and engages'with the next succeeding' ratchetttooth; while as the lay` is moved back from the breast beam thecord'Z l' turns the ring-block in a direction the reverse of that indicated by the arrow `m and the ratchetengaging with the ratchet tooth on 'thecam shaft, turns the lat-ter and depresses one pair of cams upon the front ends of their corresponding pairof marches, f. The latter by means ofV the cords draw the one setof headlesdownward lwhile the other set being act-ed `upon by the cords 7L are drawn upward, thus forming the shed, while at the same time the pair of marches f connected with the ascendingset of headles are also drawn upward to be acted upon in turn by the next succeeding pair of `cams as they are depressed by the turning of the cam shaft, effected by ay succeeding stroke of the lay. As the cord Z turns the rin block in a direction the reverse of that inc icated by the arrow m the cord l with its weight K is wound up to beready to act as the layis again moved forward.

The` second part of myinvention has reference to the movement` of the shuttle.

In the accompanying drawing I-I I are the shuttle boxes which are arranged in any convenient manner at the opposite extremities of the lay J. Each shuttle box is litted with a driver n which is connected by a cord 0 passing through a slot in the bottom of the shuttle box, with the projecting arm of a lever or picker stick p which is pivoted to the lay beneath the race. The other arm 1' of the lever ya is curved and is connected The lengths of the breast beam cords .sf are such that when the lay is at its `hindermost position and the levers are in the positions in which they are represented at Fig. 3, `these cords are drawn tight. The lengths of the shuttle driver cords o are such that when lio i proper box.

the levers p are in the positions in which they are represented at F ig. 3, the drivers are at their innermost positions in their respective shuttle boxes. The operation of this shuttle motion is as follows: The lay is drawn forward, that is toward the breast beam, thel drivers n are drawn to their outermo-st positions in their respective shuttle boxes and the shuttle is then inserted in its As then the lay is shoved backwards, the breast beam cords, tightening cause the levers p to turn on their pivots and by means of the driver cords to draw the drivers to their innermost positions, thus causing the shuttle to travel from the shuttle box in which it was inserted toward the box at the opposite extremity of the race. As the lay is redrawn forward as soon as it reaches its hindermost position, the tightened breast beam cords are immediately slacked and the shuttle, entering the box, toward which it was driven strikes the driver therein 'and forces it to its outermost position; the driver in moving turns back the lever p with which it is connected, to the position which it occupied before the lay was thrust back, and thus places it in the proper position for being operated by the breast-beam-cords at the next succeeding backward stroke of the lay.

t From the foregoing description it is evident that the principal operations in the loom, that is the throwing of the shuttle,

and the formation of the shed by the movement of the headles, are effected by the movement of the lay to which in hand looms the hands of the operator are applied. By these improvements the working of hand looms is greatly simplified as the treading is superseded by this lay-treadle-motion, and the hand-shuttle throwing is replaced by this lay-shuttle-motion.. At the same time the simplicity of the whole is such that these improvements can be applied by very ordina-ry mechanics to hand looms of the usual constructio-n.

What I claim as my invention and desire to secure byLetters Patent is- 1. The device, consisting substantially of the tappet shaft with its ring block and ratchet together with the connecting cord weight and marches, whereby the headles are raised and depressed in the proper order to form the shed by the movement of the lay substantially as herein set forth.

2. A likewise claim the device, consisting substantially of the levers with the breastbeams co-rds and picker-stick cords, whereby the picker sticks are moved to drive the shuttle by the movement of the lay.

In testimony whereof I have hereunto subscribed my name.

ISAAC H. GARRETSON.

Witnesses:

FER'rUs REED, ALEXANDER SMITH.

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