US154254A - Improvement in weft-stop mechanisms for looms - Google Patents

Description

Patented Aug.18,1874.

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UNITEJJ STATES PATENT OFFICE.

THOMAS ISHERWOOD ANDV WILLIAM NUTTALL, OF WSTERLY, RHODE ISLAND, ASSIGNORS TO THEgNATIONAL FANCY WOOLEN LOOM-STOP- MOTIONOOMPANY, OF SAME PLAGE.

IMPROVEMENT IN WEFT-STOP MECHANISMS FOR LOOMS.

Specification forming part of Letters Patent No. 154,254, dated August 18, 1874; application filed April 25, 1874.

To all whom t may concern:

Be it known that we, THOMAS IsHERwooD and WILLIAM NUTTALL, of Westerly, in the county of Washington and State of Rhode i Island, have invented a new and useful Im- .arrangement of devices for causing the tripping of the shipper-lever when the weft is not present, by which we are enabled to dispense with an apparatus arranged in front of the cloth-roll, and it is also simpler and cheaper than the apparatus commonly used.

Figure l is a front elevation of a loom having our improved stop-motion applied to it, a part of the front beam being broken out to show the apparatus clearly. Fig. 2 is aside elevation of the loom with a part of the frame broken out.'

Similar letters Aof reference indicate corresponding parts.

A represents the wire rising up through the lathe behind the weft B. T is the weft-fork in front of .the weft. This wire A we :mount on a rising-and-lalling piece,'D, below the racebeam E, by pivoting it thereto'at F, so as to swingforward and' backward, and ou the pivot or on the wire itself 'we arrange a trippingfinger, G, which is tobe swung forward when the weft is present by the backward pressure of the weft-fork and weft on the wire A, to be heldin the position for allowing the shipper to remain undisturbed; but when the weft fails to be present, to press the wire back, a light spring, H, which is suitably arranged for the purpose, holds the finger G back over the horizontal arm I of an elbow-lever, which has a rod, J, projecting from the side of its vertical arm K, so that when the block D goes down the linger will swing the rod forward, and hold it in the position to strike the lever L, when the lathe beats up and causes it to throw oil' the shipper-lever M. The elbowlever I K is pivoted to a bracket, N, projecting downward from the race-beam;l but the block D, on which the wire is mounted, is attached to the upper end of the connecting-rod O, and works in guides P iu the bracket, and the connecting-rod is attached to the lever Q, which is forced downward by the cam It and raised by the spring S. The cam throws the lever down during the latter part of the beat up, and if the weft is present and presses the wire back properly the finger Gr goes down in Vfront of arm I and does not disturb it. The

weft-fork T we suspend from the upper part of the loom-frame by an arm, U, so as to leave the front of the cloth-roll free, and we mount it on a pivot, V, so that it can be thrown over` back out of the way, as indicated in dotted lines W, when it may be required to do so. A light spring, X, holds the arm and the fork to cause the latter to press the wire A back by the weft.

It will be seen that in this arrangement the wire A acts as a tripper for freeing the shipper-lever, while the weft-fork 'l takes the ofiice of a comb for pressing the weft against the tripper.

If the feelers be arranged in front of the lathe, it will often be found that they will rise up in front of the weft and throw off the belt when the weft is all right, owing to their position so far forward. We iind that the nearer we can get the fee-1ers to the reed, and yet have them workV unobstructedly, the better, and, in practice, we arrange them about half an inch in advance of it.

By arranging the feelers to rise up through the lathe they may come up near the weft,

and thus have room to be swung back by the weft, when it is present, for moving the tripping-dnger out of the way of the throwing-ofi' lever, whereas if arranged on the front of the lathe, or in advance of it, it is necessary for them to be at the extreme of the backward range when they rise up to insure their coming behind the weft, and then, in order to move for throwing the tripping-linger, so as to act on the throwing-off lever, in case of the absence of the weft, they must swing forward, for which there' is not space between'the line Where the weft is left by the shuttle and the reed, nor time between the rising of the fmgers and the then forward movement toward the weft.

Having thus described our invention, We claim as new and desire to secure by Letters Patentl. The Wire A, pivoted to a rising-and-falling support, D, and provided With the linger G, and spring H, and the elbow-lever I K, and

rod J combined with the lathe, the lever L and the feeding-fork T suspended from the loom-frame, all operating together substantielly as specified.

2. The vertically-reciprocatng wire H, the support D, the tripping-tinger G, guide P, rod O, spring S, lever Q, and cam R, in combination with the lathe, all arranged and oonstructed to operate substantially as herein described.

3. The fork T, suspended from the upper part of the loom-frame, in combination with the vertically-reciprocating wire A, substantially as speoied.

THOMAS ISHERWOOD. WILLIAM NUTTALL.

Witnesses:

THOMAS D. SHEFFIELD, THOMAS VINCENT.

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