US89561A - Improvement in weft-stop mechanism in looms - Google Patents

Description

naar ema JESSE D. COTTRELL, OF HOPEDALE, MASSACHUSETTS,

Leners Patent No. 89,561, @ma May 4, 1869.

IMPROVEMENT IN WEET-STOP MEOHANISM IN LOOMS.

The Schedule referred to inthese-Letters Patent-and making part of thesame.

To all persons to whom these presents may come:

Be it known that I, J Essa D. GoT'rnELL, of Hope dale, in the county of Worcester, and State of Massachusetts, have made a new and useful Invention, having reference to Looms for Weaving Cloth; and I do hereby declare the saine to be fully described in 'the following specification, and representedin the accompanying drawings, of which- Figure 1 is a top view,

Figure 2, a front elevation, and

Figure 3, an end view of the frame and sundry parts of a fancy loom, with Amy invention applied thereto.

The n. ture of my invention may be thus set forth, it consisting in the combination and arrangement of a separate lever, with the filling-fork, when such level'` is combined with other mechanism for operating the shipper, such separate lever being for the purpose, among others, of preventing a shuttle, when, during its iight, it .may .be caught back of the fork, from causing breakage of the fork, as is liable to take place when the filling-fork is restrained from swinging forward. v

Also, in the combination of a cammed arm, or-its mechanical equivalent, applied to and so as to be operated. by the illing-fork, substantially'in manner as hereinafter described, with a shelf or bracket, a recip rocating pitman, and its eccentric or their equivalent, and with a bent lever applied to the harness-operative mechanism, the takefup n1ecl1anism,the leto mechanism, and the drop-box operative mechanism, or either of such mechanisms, substantially in manner as hereinafter described, the object of the said combination being, onthe breakage of a weftthread, during the throw of a shuttle, to so throw out of operation either or each of such mechanisms, that the beating of the lay caused by its momentum, after release ofthe shipper, shall not putin operation either or each of the said mechanisms, so as to require any resetting or 'rcadjustment of parts, before the'next pick or throw of the shuttle can take place.

Also, in the arrangement of thc tension-spring of the whip-roller, or warp-guide, on the upright rod of such guide, and within the worm-shaft, and against a shoulder therein; such arrangement serving, not only to protect the spring from dust, or other accumulations, or injury, but enabling the spring to o'perate with friction, to prevent the worm-shaft from revolving ont of time.

filling-fork, G or G', which is a bent and furcated leg ver, having its longer arm arranged within and pivoted to the standard, the pinor pivot being as shown at d in fig. 4, which is a vertical section of the standard, the filling-fork, and the adjacent parts.

There is applied to the lay, in front of each fillingfork, one of two grids or racks,H H', of the kind ordinarily used.

Within each standard, and resting on the tail of the filling-fork thereof, is a separate lever, I, whose fulcrum is at or near its rear end.

The said lever I, by a rod, g, is connected with an arm, e, projecting froma rocker-shaft, 'f, arranged within the breast-beam, (see Figure 5,) which is an inner side view of the breast-beam and the mechanism connected therewith.

From the shaft f another arm, h, projects, and, by a rod, i, is connected with an arm, k, extending-from a short shaft, l, arranged below the shaft j, and going through one of the end-parts of the loom-frame.

Both ofthe rods y and i are jointed to the respective parts with which they are connected.

From the outer end of the shaft l, the cammed arm L extends, over and upon a shelf or bracket, M,'pro jecting from the loom-frame.

Figure 6 is a top view, and g Figure 7 a side elevation of the said cammed arm, it consisting of an arm provided with an inclined plane or cam, m., which is formed and extended from the arm, in manner as shown in the'drawings.

A pitman, N, is arranged on the shelf M, and applied to anV eccentric, O, fixed to the lay-shaft, such shaft, while in revolution, producing a reciprocating movement of the pitman, relatively to the shorter armof a bent lever, P, which has for -its fnlcrnm the main shaft n of the take-up motion, or mechanism.

The said shaft n is supported in a bearing or bracket, o, and has fixed on it a ratchet, p, and a pinion, q.

An impelling-pawl, 1', pivoted to the shorter arm of the lever P, rests on the toothedperipliery of the ratchet, and serves, by the'vbrations of the lever P, to actuate the ratchet, and, of course, the take-up mechanism, which may be supposed to be of the ordinary kind, of Awhich the ratchet and its shaft constitute a part.

In the drawings, three rods, s t u, are represented as jointed to the lever P, and extendedfrom it.

The h'rst of these rods, viz, s, is also jointed to the horizontal rocker-lever fu, which carries thev impellingpawl tv of the let-od mechanism, such pawl being to operate against the ratchet x of the worm-shaft y.

A worm, or screw, z, on the shaft y, engages with' a gear, a', fixed on a shaft, b', arranged and provided with a pinion, c, as shown in the drawings.

rlhe said ratchet x, lever vn, pawl vw, worm-shaft y, screw z, worm-gear a', and pinion c1, constitute parts ofa ietodmechanism in common use, the yarn-- beam being supposed to be geared to the pinion.

The rod t is 'jointed to the lever c2 of the draw-pawl d of the ratchet e of the drop-box operating mechanism.

The drop-box, shown atIt, as applied to the lay, is such filling-fork, force it back, or cause it to turn and supported by its arm f', upon the longer arm of a lever, y.

This leveris provided with a triangular cam, 71.',

which operates with a toothed wheel, t', fixed on the shaft of the ratchet c.

The lever P, while in movement, produces a corresponding movement of the said lever o2, whereby the draw-pawl d will set in motion its ratchet, and there. by effect the movement of the drop-box.

The rod Au connects the lever P with the lever S, which carries the impelling-pawl T.

This pawl operates the toothed wheel U of the toothed drum V, by which the set of levers W, connected with the harness-carriers Z Z, 85o., are operated, in order to eectt-he necessary changes of the harnesses, as may be required during the process of weaving. l

The lifter-lever, which acts in connection with the set of' levers WV, is shown at X, and its operative cams at Y, these latter being fixed on the shaft E. This apparatus, for operating the harnesses, is well known From the shaftk ofthe warp-guide, or whip-roller, an arm, Z', extends to a vertical rod, mjthe rod being passed through the arm, and provided with adjustable collars n' o', one of which is above, and the other below the arms.

Each of the said collars is furnished with a setscrew, p', to enable the collar to be clamped to the rod.

The rod m carries the sector g, by which the impelling-pawl w is kept out of action upon the ratch et The said sector, fixed to the rod m' by a set screw, is adjustable vertically on the rodand rests on the top ot' a shelf or bracket, fr'.'

Therod passes through the bracket, and `extends down within the worm-shaft a which is tubular.v

A helical spring, s, (see Figure 8, which is a, seotion of the wormshaft,) envelops. that part of the rod which is within the worm-shaft, and the ,said spring rests on a foot, t', fixed to the lower part of the rod.

The upper end vof the spring bears against a shonlf der, a', at the upper part of the worm shaft.

By pressing against the shoulder, thespring keeps the worm-shaft from revolving out of time.

This application of the spring saves the necessity of employing the frictionfpulley and band, generally used with the let-ofi` mechanism.

The belt-shipper is to be so arranged that, while the shorter arm of the lever P is in the act of being moved backward by the pitman, such arm or a pro jection from it shall be forced against the shipper, so as to throw it o its retaining-shoulder and set it iiee in order that it may spring and shift the driving-belt from the fast to the loose pulley.

From the above, it will be seen that while the weft, during a throw of the shuttle, may remain unbroken, it will lie against one of the grids or racks ofl the llving-forks, so that, when the lay may beat up, the weft,

resting against the grid, will, by its action against effect the eleva'tion of the cammed arm L.

This will enable the pitman N, during its advance, to pass directly underneath the cam m ofthe said arm, and meet and move the lever P, so as to actuatc each of the various mechanisms connected therewith.

But should the weft-thread, during a throw of the shuttle, not remain intact, or become broken, neither of the filling-forks will be actuated by it, when the lay beats up.

Consequently, the cammed arm L will remain down upon its bracket or shelf', and the pitman, in advancing, will moet and pass up the cam m'of the said arm, and over the top ofthe upright arm of the lever P.

Thus, under these circumstances, no movement of such lev'er, or the various mechanisms connected with it, will be produced, although the lay may continue to move after the shipper may have been set free, so as to cast the driving-belt of the -loom off the drivingpulley and upon the loose pulley.

The next time, theweft may be properly thrown across the race-beam of the lay, the harness-mechanism, the take-np mechanism, and the let-off mechanism will be again properly thrown into operation, and without the necessity'of any adjustment of the harnesses, by the attendant, in order to bring the right ones into action, to prevent irregularity of weaving of the figure or figures.

I claim the filling-fork Gas constructed, not only as a bent and furcated lever, support-ed on a pivot, or fnlcrum, d, as described, but as disconnected from and with its horizontall arm disposed underneath and against an arm, or lever, I7 combined with mechanism as explained, or its equivalent, for operating the shipper, the whole being substantially specified and represented, and to enable the illing-fork, when a shuttle, during its flight, may be caught in the Warp and borne. against the backs of the prongs ofthe fork, to move, so as to allowthe shuttle to pass yit without causing breakage ofthe fork or any part of the mechanism for actuating the shipper. I also claim the combination of the cammed arm L, or its-mechanical equivalent, applied to, and so as to be operated by the filling-fork, in manner and by means substantially as described, with the shelf, or bracket M, the reciprocating pitman N, and its eccentric O, or their equivalent, and with the bent lever P, applied to the harness-operative mechanism, the takeup mechanism, the let-oft` mechanism, and the drop-box operative mechanism, or either of the said mechanisms, substantially in manner as specified.

I also claim the arrangement of the tension-spring s', of the whip-roller, or warp-guide, on the upright rod m' of such guide, and within the worm-shaft y, and against a shoulder, n', therein, the whole being substantially as, and to effect advantages as hereinbefore explained.

JESSE D. COTTRELL. Witnesses:

WM. F. DRAPER, GEORGE DRAPER.

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