US59962A - Improvement in stop-motion foe looms - Google Patents

Description

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IMPROVEMENT nv sirop-MOTION:sontoons.

ALEXANDER CARMICHEL AND WILLIAM lBARNEY, OF WESTERLY, RHODE ISLAND, AS

SIGNORS TO THEMSELVES AND COTTRELL 8u BABCOCK, OF THE SAME PLACE. i

SPECIFICATION. TO ALL WHOM IT MA'Y CONCERN:

Be it known that we, ALEXANDER CARMICHEL and WILLIAM BARNEY, of Westerly, in the county of Washington, State of Rhode Island, have invented certain new and useful improvements in Stop-Motions for Looms and we do hereby declare the following is a full and exact' description thereof.

Our invention consists -in mechanism whereby the belt is shipped 'oi the driving-pulley, and a positive stop` interposed to arrest themotion ofthe loom by the'same automatic movement; and in arrangements of the details which make the same more eiicient and convenient. i

Stopmotions have long been considered necessary, the purpose being to stop the action of the loom when:

ever the filling-yarn breaks. ln -some varieties of weaving, no particular harm results, excepting 'the loss of time, when theshuttle iies idly across, and all the mechanism ofthe loom continues toact with its proper motions; while, in consequence of there being no filling introduced by the traversing of the shuttle, no weaving` is performed. But in other varieties of looms, those adapted to weaving checks or figures, for example, the evil becomes very great, by reason of the disturbance and confusion thereby introduced in the weaving of such work.

The stop-motions in general use are of two kinds. The first is a positive stop, arresting the motion of the machinery by interposing a sudden check, as` by suddenly locking the driving pulley, or some other principal part. With such, the `mechanismis strained, and the belting, etc., subjected to moreor less injury by being compelled to islip on the driving pulleys. '.lhe` other form of lcommon stop-motion simply ships the belt' ofi' the driving pulley, and this relieves the mechanism, bnelting, etc;, from strain; but with such, the action of theloom is not instantly arrested, and the few'revolutions, or partial revolutions, of the loom after the shipper has moved, may be sutlicient to produce serious diiliculty. Our invention, by simultaneously moving the shipper, and positively arresting the motion, avoids these faults of the ordinary stop-motions, reduces the labor of attending looms, reduces the quantity of waste produced, andmakes a better cloth.

We will first proceed to describe our invention,'and will afterwards designate the points which we believe to be new. Accompanying drawings form a part of this specification. i

Figure 1 is a side elevation; and

FigureZ a plan'yiew of a loom with our improvements. n v

Similar letters o'f reference indicate like parts in both figures. The drawings represent the novel parts, with so much of Vthe other parts asis necessary to indicate their relation thereto. Thematerial may be of the ordinary kinds. The novel parts may be iron. A

A is the fixed framing of the machine, B is the crank, and C the connection which givesnnotion to the lay, D, which latter isiadapted to vibrate on. the centre, d, as usual. D1 is the reed, Dithe shuttle-race, and M the cloth. E is a shaft which turns with half the velocity of the crankshaft, B; and E isa cam fixed thereon, which consequently revolves once while the crank, B, revolves twice. F is the long arm, and F the short arm of] a lever which vibrates onv the centre, f, and is actuated by the cam, E. G is a loose lever mounted on the saine eentre,f, and g is a light lever nearly balanced on the lever, G, just described, being pivoted thereon at the point, g. AAt each revolution of the shaft, E, the lever, F F', is operated, throwing the arm, Ff, powerfully to the left, looking at the drawings, and returning. The light lever, g, formed` as represented,'hooks over. the end of thevarm, F', and holds thereon with such force as to compel itself and the connected arm, G, to-.be also carried forward, that is, toward the left,'in our `figures, with the arm, F', unless it has previously felt the threadof the filling, which stretches across the space where the lighter end of the lever, g, is presented. In all ordinary cases, the lever, g, touches the filling thread andisv tilted so that the arm, F', when it makes its forward movement, produces .no effect but the moment the filling breaks, it ceases to tilt the lever,.g, and, consequently, the lever, g, and the connected arm, G, under such circumstances are moved forward. So far `as yet described, the mechanism is old. The forward movement `of the arm, G, thus taking place only at the time when the iilling is broken, has long been employed to set inmotion the additional mechanism which stops the loom# The additional mechanism hereinafter described contains novelty. H is a lever pivoted to the framing at the point, h, and

adapted to be struck andturned by the forward movement of the arm, G. I is a lever provided with a convenient` handle, I', at its top, and attached tothe framing by aspring connection, z', below, so that it is adapted to allow a slight motion by its elasticity. J is a hook fixedA in the frame at the point represented. Kis a slide mounted as represented, in the housings, c c, and bent as represented the long arm, K1, receiving the pressure of the strong spring L, fixed on the frame at the point, Z, and which tends to move the arm, K, outward from the framing of the loom, it being restrained only by its contact with the lever, I, before described. On the other extremity of the slide, K, is a short arm, K2, projecting horiz ontally-toward the lay, D. This arm, K2, forms a positive stopfor the lay by striking the pin, which projects forward `from the lay, D'. When the slide, K, is in its usual condition, and the loom is working satisfactorily, the arm, K2, stands out of thepath of -the pin, and produces-no effect But when, inconsequence of the absence of the filling thread, the lever, H, is turned as above described, it pushes.-

the lever, I, out of contact with the hook, J, in which condition it oifers-noresistance to the motion of the'slides, K, which immediately moves outward, in obedience to the spring, L. This movement puts the stop, K2, directly in the path of the pin, so that las the lay, D, moves forward, the pin,` strikes the' arm, K2, and arrests the motion. P is a lever pivoted to the frameA at Athe point, p, it is providedlwith two forks. The fork, P1, embraces the lever, I, and the fork, P2, embraces the belt, Q, which 'is the drivingbelt. When the loom isworking satisfactorily, the lever, I, bein'g held close to the framing of the loom by being held within the hook, J, the fork, P2, stands in such position that the belt, `Q,'runs on the fast pulley, R, and maintains the properhmotion of the loom. At the Amoment the lling thread breaks, and induces the series of movements above described, the outward motion of the arm, I, turns the lever, P, on its centre, p', moving the fork, Pl, 'outward from theframing of the loom, and movingl the opposite fork,'PZ, inward toward the bed of the loom.- This causes the fork, P2, to act as a belt shipper, and transfer the belt from the fast pulley, R, to the loose pul1cy,-R., and allows the belt to turn the loose pulley, R', idly, without imparting` any motion to the loom vor inducing any friction or strain on the parts. l?3 is an additional arm on the same lever, P. It stands in such position that it is of n0 effect while the loom is working satisfactorily; -but the moment the lever, I, moves outward as described, and

turns the lever, P, on its'centre, p, the arm, P3, is placed in such position as to meet the crank, B, and to thereby arrest the motion of the loom. It will be observed that this arm,'P3, forms an additional positive stop to thev loom, so .that with all the parts here described, the breaking of the.' thread induces iirst, the simultaneous putting in `position of two positive stops to the motion 'of lthe loom, the arm, K2',strik'ing the'pin, on the lay, D, and the arm, P3, striking the crank, B; and second, the movement of the belt shipper, P2, so as to shift thevbelt olf the driving pulley. I can, as above intimated, dispense with one of the positive stops, P3, or K2, when the other is in good condition, so as to 4be perfectly reliable. All the'parts are instantly placed in a condition for weaving again by the attendants simply 'grasping-the handle, I', and moving it inward toward' the frame, and' drawing it forward into the hook, J. This movement ships the belt onto the driving.pulley,R, and removes both the positive stops out of the way, so as to no longer obstruct the motion of the loom and itat the same time places all the parts in a-proper position to be again operated whenever the filling thread breaks. I provide the handle, K3, for convenience in sometimes moving the'slide, K, to allow of turning the loom by hand before touching the handle, I. `We do not confine ourselves to the employment of both the positive stops, the one acting against the lay, D, and the other againstlthe crank, B, as we believe either may be used with good effect without the other, but in such cases weprefer to retain that portion of the mechanism which directly arrests the action of the 1ay,'D. Itis not essential to the success of our invention that the'positive stop shall be a slide. A lever,

or any other convenient modification of such device, may be employed in lieu of the slide if preferred; the purpose being to simply provide-a movable part of sucient strength, and easily moved, so as to be readily thrown into position, to arrest the motion, by the action of a spring, or an equivalent weight, or the like, at the time when the absence ofl the filling thread shall callV for it. Some ofthe advantagesdue to'certain features of our invention may be separately enumerated as follows:

First, by reason of the fact that a positive stopis introduced to arrest the motion of the loom at the same Y moment the shipper is moved, we are able to insure that the belt shall be placed in a position for being immediately slipped off the pulley so as to greatly diminish the strain thereof; while at the same time the action of the loom is positively and instantaneously stopped, so that there an be no possibility of another throw, or partial throw of the shuttle.l This avoids the necessity for picking out threads, setting the motion of the loom back, readjusting, etc., in case a jacquard4 or .other delicate mechanism is employed to produce 'ligures, checks, or the like saves-the wearof belting, and the loss of vmotive power','a.nd .weaves a better fabric,

Second, Vby reason of the fact that the stop, K2, arrests the motion of the lay, we are able to insure that no springing of the mechanism, or other cause, shall allow the lay to advance sofar as to strike the shuttle, if the shuttle lies in the shed. i

Third, by reason of the fact that we arrange the slide, K, near the top of the beam, and provided with aA handle K3, or its equivalent, for conveniently moving it by hand, we promote the convenience of the operator by making it easy to observe its position, and easy 'to change it byhand, so that the loom may be turned by hand and perform one or more revolutions in that manner before the belt is shipped on thepulley, and powe weaving begins.

Having now fnlly described our invention, what we claim as new therein, and desire to secure by Letters Patent, is asV follows:

1.l We claim the combination, with a loom, of a belt-shifting motion and positive stop, arranged for joint operation, substantiallyl as and for the purpose herein specified. v

2. We claim arranging a positive stop in such combination, that it shall act against the lay of the loom, substantially as and for the purpose herein specified.. .Y

3. We claim the within-described arrangement of such positive stop in combinationas specified, in sight and within convenient reach of lthe operator,`and providing it witha handle K3, or its equivalent, so that it may be more easily placed by hand in such position as to allow the loom to be Yoperated freely by' hand, all substantially as and fol` the purpose herein speciiied'. f

' ALEXANDER CARMIGHEL,

Witnesses WILLIAM BARNEY.

JEDIAH D. TAYLOR,

WILLIAM P. Cov.

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