US90627A - Improvement in stop-motion for looms - Google Patents

Description

,waited gister @stent @twine Letters Patent No. 90,627, dated June 1, 1869.

IMPROVEMENT IN STOP-MOTION FOR LOKQMS.

The Schedule referred to in these LettersPatent and making part of the sama.

To all whom. Iit may concern:

Be it known that I, A. A. BARKER, of Lewiston, in the county of Androscoggin, and State of' Maine, have invented a new and useful [Improvement in Looms;'a.nd I hereby declare t-he following to be a full, clear, and exact description thereof, which will enable others to make and use my invention, reference being had to the accompanying drawings, forming part of this specitication, in which- Figure l is a. View of the interior of one side of the loom, next to the stop-motion.

Figure 2 is a side elevation of my invention, showing the pattern-chain, stop-motion, Sac.

Figure 3 is a front end elevation.

A is a side view in detail of the stop-motion.

B is a top plan of same.

As looms are now usually constructed, when the fillfing 'runs out, the stop-motion used stops the loom, but the momentum ofthe machinery springs the shed three or four times, and operates, for about the same number of times, the pattern-chain and box-motion. By this continued motion, the shuttles are changed, and frequently a thread or threads of another color woven in before their turn. This necessitates the picking out of the wrong thread or threads, and setting back the pattern-chain and box-motion to the exact point at which they were when the filling run out.

Any error in the setting back causes a break in the weit-pattern.

To avoid accidents of this kind, and the loss of time required to correct them, the weaver is obliged to watch his loom very carefully, and replace the shuttles as soon as they7` are empty, which occurs about once in three-quarters of a minute. But on an average, with an vordinary weaver, this accident will occur about once in ve shuttles, and, with an intricate pattern, from five to eight minutes are required to set the loom in motion again.

It has long been desirable to obtain some device which will stop the box-motion and pattern-chain as soon as the iilling runs out, as it would enable a weaver to take charge of' more looms, and consequently doV his work more cheaply, The quality would also be improved, as it would lessen the liabilityy of breaks occurring in the pattern, which detract' from the value ofthe fabric.

Toobviate this diliculty is the object of my invention, and by reference to the accompanying drawings its details will be understood.

Fig. 1 shows an inside view ofthe loom.

.The stop-motion is seen at a, iig. 1, with the tongue d dropped and caught by the lever 1).

b is operated by the cam c on the main shaft of the loom.

As long as the thread remains in the shuttle, the tongue d is thrown up by it, as seen in dotted lines at A, but when it runs out, it is caught by b, as seen ,in fig. 1, and the stop-motion pushed outward by it, as shown.

B shows a top view of the stop-motion, the portion marked 1 being the bed of thc same, and 2 being the slide moving in it, operated by b in the manner de- Aates to raise the dog, which gives movement to the clmin-motion. s

This dog is seen at f, and is operated by the grooved eccentric g on l.the main shaft. The wire e raises it, and detaches it from the ratchet h of the pattern-chain.

At the same time it presses inwardly ythe wire t', pivvoted at The end of this wire is passed through the loop l, fig. 2, in the lever m, drawing it out from the patternchain.

To this lever m is attached the wire n, connecting with the right-angled lever a at its lower end p.

The, upper end y 0l this lever has a wire, q, attached to it, the lower extremity of which is fastened to the dog Ir, which operatesV the box or shuttlemotion by means of the' ratchet s, seen in dotted lines.

The lever working the shuttles is indicated at t.

-u is the cam giving it motion.

fc is the reed through which the web passes.

w shows the lever moved by the cam :t on the main shaft, which gives to the pawl r its motion.

Vhile the thread remains in the shuttle as it passes 1 through the shed, it strikes the tongue of the stopmotiou, and throws it up, as seen in dotted lines at A, so that it does not' engage the lever b, but when the filling runs out, the tongue is caught by its lip by b, thc slide is pushed forward, pressing outward the wire c, which both raises the dog, or pawl f from the ratchet h of the chain-motion, stopping that, and at the same time forcing the wire Ai inward, turning out its end k, and the lever lnt connected with it, and drawing with it the wire-n and end p of the right` angled lever o, and raising the end y, wire q, and dog,

Wlnit I claim as my invention, and desire to secure by Letters Patent, is-

The eombinntion, with the weft-fork, pattern-cylinder, and shuttle-box operating-cum, ofthe rods 6,1', 12, and q; and levers o m, for stopping the pattern-oylin .der and shuttle-box cam when the weft fails, substantially as described.

Witnesses:

F. 0. SANDS7` B. S. BARR.

A. A. BBKER.

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