US492998A - Weft stop-motion for looms - Google Patents

Description

(No Model.)

- "r, THAGKER. WBFT STOP MOTION FOR LOOMS.

Patented Mar; '7, 1893.

\/\/|TN 55.555: INVENTD F1:

"j" rw' i UNrTnn STATES ATENT Finca WFT STOP-MOTION FOR Looms?) SPECIFICATION forming part of Letters Patent No. 492,998, dated March '7, 1893.

Application filed August 8, 1892. Serial No. 442.413. (No model.)

'To @ZZ whom t may concern.-

Be it known that I, THOMAS TRACKER, of Fall River, in the county of Bristol and State of Massachusetts, have invented certain new and useful Improvements in Weft Stop-Motions for Looms, of which the following is a speciiication.

This invention has relation to weft stop motions for looms for Weaving; and it has for its object the provision of means whereby the weft-fork may be adjusted with respect to the course of the weft thread to meet requirement arising from changes in size or number of such weft-thread, and the tail piece of the slide bar may be adjusted independent of the weft fork to suit it to the position of the weftfork lever which sets upon the shippin g mechanism to knock off the loom.

To this end my invention consists in providing the slide-bar upon which the weft fork is pivoted with peculiar features and with adjustable means for acting upon the devices for effecting a knocking off of the loom, all as I will now proceed to describe and claim.

Reference is to be had to the annexed drawings and the letters marked thereon, forming a part of this specification, the same letters designating the same parts or features, as the case may be, wherever they occur.

Of the drawings-Figure l is a side view of so much of a loom as is necessary to show, in order to explain my improvement. Fig. 2 is a top plan View of the chief parts shown in Fig. 1,with myimprovement'applied thereto. Fig. 3 is a `sectional side view of the invention with immediately associated parts.

In the drawings-ct designates the loom frame.

b is the slide-bar upon which the weft-fork cis pivoted in the usual way. The slide bar b is provided with a tail-piece d which is adapted when the slide-bar is moved back to move the weft-fork lever e Which acts upon the shipper rod f to eect a knocking off of the loom. Said tail piece may also act upon a lever g, which, through the medium of other devices may throw out of action the means for actuating the cloth roll.

71 is the bottom shaft upon which there is a cam or tappet 'L' which acts upon one end of an angular lever j, the other end of said lever being constructed and arranged to en gage the hooked-end 7c of the weft fork when said hooked end is not raised, and move the slide-bar b back. It will be understood that so long as the weft thread is not broken and lies in the shuttle-race it comes in contact with the fork c in the usual way at each alternate beat of the lay and turns it on its pivot, raising its hooked end lo out of the way of the upper end of the leverj; but when the thread is broken or absent, the fork is not turned, and consequently its hooked end remains in the path of movement of the upper end of the lever j which engages it and moves the slide bar b back with the effect of 'stopping the loom, as before explained.

In the operation of weaving it is necessary to adjust the weft fork nearer to the weft laid in by the shuttle When a high number of fine Weft is used, than when a loW number or coarse thread isemployed, in order to have the thread act with sufficient stress to raise the hooked end of the fork. Heretofore this adjustment has been most commonly effected by bending the tines of the weft fork. This was not only difficult of accomplishment, but frequently threw the tines out of proper alignment and resulted in breakages. Moreover, when the tines were bent far forward the fork would some times skip the weft by passing thereover, With the effect of stopping the loom While the weft remained intact. I accomplished the necessary adjustment of the weftfork by adjustment of the slide bar b, in'a manner to render the same to all intents and purposes extensible, so that the weft-fork may be adjusted toward and from the line of the weft Without affecting the position of the tail piece. I also make the tail piece cl adjustable toward and from the weft-fork lever c without affecting the position of the weft-fork with relation to the line of the weft. These adjustments are effected by means of a bolt l which passes through a slot in the slide-bar and'also a slot-in the shank of the tail piece, the said bolt being tapped into a nut n below the shank of the tail piece. In the present instance the nut n is constructed with an angular part o which abuts against an offset p of the frame and limits the forward movement of the slide bar, as shown in Fig. 3. In this Way the slide bar is, as it were, made extensible, so that the weft fork and tail piece can be adjusted the one independent of the with an adjustable angular part or stop to other if need be to meet the requirements limit its forward movement', anda weft-fork noted. pivoted upon the slide-bar, as set forth.

Having thus explained the nature ol' the n- In testimony whereof I have signed my 15 5 Vention and described a Way of constructing name to this specification, in the presence ot and using the same,though Without attempttwo subscribing" Witnesses, this 22d day of ing to set forth all of the forms in which it July, A. D. 1892.

may be made o1' all of the modes of its use, it THOMAS THACKER. is declared that What is claimed islVitnesses: lo The frame or suppo1t,aslidebar extensibly ARTHUR XV. CROSSLEY,

adjustable on the said support and provided ABBA N. LINCOLN.

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