US138893A

US138893A - Improvement in stop mechanisms for looms

Info

Publication number: US138893A
Authority: US
Publication date: 1873-05-13
Anticipated expiration: 1890-05-13

Description

T. I'SHERWGUD SLW. NUTTALL.

Siep-Mechanism for Looms.

iNo. 138,893, Patented May 13,1873.

UNITED STATES PATENT FFI IMPROVEMENT IN STOP MECHANISMS FOR LOOMS.

Specification forming part of Letters Patent No. 138,893, dated May 13, 1873 application filed April 5, 1873.

To all whom it may concern:

Be it known that we, THOMAS IsHEEwooD and WILLIAM N UTTALL, of Westerly, in the county of Washington and State of Rhode Island, have invented a new and Improved Weft Stop-Motion, of which the following is a specification Our invention consists of two or more wires, with devices for presenting themi behind the weft-thread at the middle of the lathe, or thereabout, after the shuttle passes, to insure the action of the weft-fork or feeler for throwing off the shipper-lever when the weft is present. It also consists of a novel arrangement of means for presenting the feeler to the weft in a suitable position in advance of the cloth, and then movingit away, so as not to interfere with the beating up of the weft by the reed. The arrangement of the stopping mechanism at the middle of the lay saves the necessity of employing one near each edge of the warp, and it is better, because, in the latter arrangement, an end of broken weft extending to the middle of the warps, or beyond, will often raise the latch of the weft-fork and prevent the stopping of the loom. It often happens in looms carrying several shuttles that the wei'ts break, so that the ends are long enough to raise the latches, Vowing to the cutting or overstraining of them in particular places by the boxes in which the shuttles are changed.

Figure 1 is a sectional elevation of a loom provided with our improved weft-stop motion. Fig. 2 is a front elevation, with a part of the front beam broken out. Fig. 3 shows the catch of the belt-shipper lever.

Similar letters of reference indicate corresponding parts.

A A represent two wires or small rods projecting upward through the beam B of the lathe from the free end of a rock-lever, C, pivoted at D on a braeket,E, projecting downward and forward from the lathe-beam, and carrying at its other end a friction -roller, F, which works in a cam-slot, G, of a plate, H,

attached to the under side of the front beam time to pass the notch L of the lever N, or

until the lathe goes back. The latch and the feeler are pivoted on the end of the rock-lever O, on the shaft P, which has a long arm or crank, Q, operated by the cam It, on the main shaft S, which is so shaped that the feeler is carried back between the warps in front of the lay immediately after the shuttle passes, and sufficiently far to be struck` by the weft and pressed back by it until the latch has passed the notch L, but withdraws it in time to be out of the way of the reed at the beat up. When the weft is broken, the latch falls into the notch L, so that cam B throws lever N back by means of arm Q and rockdever O, and lever N throws the shipper lever T out of notch n by the arm V, on the end of shaft P1, rock-lever W, and the pin w. A

It is immaterial whether the wires A be arranged under the lathe-beam, together with their actuating devices, or above, for they can be arranged above it as well, as shown in dotted lines A1, the rock-lever being arranged on the upper part of the lathe, say the beam A2 andthe cam-plate H, lnounted on any suitable standard rising up from the loom-frame. By preference it, and the rock-lever C, would be arranged at one side of the loom, while the rod B1, projecting from the free end of the rock-lever, would extend along the lathe to the middle or thereabout.

In practice we propose to have the levers N and O so attached to the shafts P and P1, or blocks Q thereon, that they can be readily removed by removing a pin, Q2, to facilitate the removal of the cloth from the clothroll.

Having thus described our invention, we claim as new and desire to secure by Letters Patentl. The combination with the lathe of the wires A and mechanism substantially as described, for presenting them behind the weft and withdrawing them in the manner set forth.

2. rIhe combination of the rock-lever O, arm Q, cam R, and feeler and latch with the lever N, for operating the shipper-lever, all arranged to operate in the manner described.

3. The combination of the wires A, arranged and operating with the lay as described, and the feeler and latch as set forth.

THOMAS ISHERWOOD. WILLIAM NUTTALL. Witnesses:

T. B. MosHER. ALEX. F. RoBERTs.