US114606A - Improvement in loom take-ups - Google Patents

Description

W. ROUSE.

Improvement in Loom Take-Up. N0. 114,606. Patented May 9,1871.

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tutti sara ttinri 'f (tffift WANTON HOUSE, OF TAUNTON, ASSIGNOR TO GEORGE DRAPER & SON,

OF HOPEDALE, MASSACHUSETTS.

Letters Patent No. 114,606, dated May 9, 1871.

IMPROVEMENT IN LOOM TAKE-UPS.

The Schedule referred to in these Letters Patent andv making part; of the same. 1

To all persons to whontthes presents may come Be it known that I, WANTON Rouse, of Taunton, of the county of Bristol, of the- State of Massachusetts, have made a new and useful invention having reference to Looms for Weaving; and do hereby declare the same to be fully described in the following specification and represented in the accompanying drawing, of which- Figure 1 is a top view,

Figure 2 a rear elevation, and

Figure an end elevation of a loom-frame provided with my said invention.

v The main purpose of the mechanism to be hereinafter described is to allow the sand or cloth-roller to revolve backward a short distance when a stoppage of 'the loom takes place by reason of breakage of the weft or filling, or the'want of weft or filling in the shuttle,

the amount of such back movement of the roller circumferentially being an arc equal to the width of two or'three threads of the lling or thereabout. The object of thus causing or allowingthe roller to fall back is to avoid the production of what weavers term thin place in the cloth.

It is well known that after a stoppage of the loom takes place, by reason of breakage of the filling ora want of lling in the` shuttle, the-latteiL-that is, the

shuttle-will generally be thrown one or more times too much across the race-beam of the lay. Thelay beating up in the mean time will actuate the takeu-p motion or mechanism and the let-off motion or mechanism., whereby an extra takingl up of the cloth and an extra letting otf of warp will be effected, so that when the shuttle again commences to weave there will be a loose or thin place or filling-void7 left in the cloth.

From the above it will be seen that, by letting the cloth woven fall back a little, equal tothe amount taken up during the false movements of the shuttle, I restore the cloth to its normal position, and thus avoid the improper weaving, as described.

Mechanism for the purpose above mentioned will be found explained in the specification of Bellfords British patent No. 670, A. D. 1853; in those of the British patents of Taylor and Hurst, N o. 12,997, and Goldie, N o. 3,203, for 1863; and also in the specification of the United States patent No. 109,345, dated August 4, 1870, and granted on an invention made by George Richardson.

The mechanisms of Bellford and Richardson depend entirely 'on the strain or contraction of the cloth and warpe to effect the necessary backmovcment of the cloth-beam,and in doing this there has to be overcome the gravit-ating power or weight of the sliding portion of the sectoral pawl.

In the weaving of thin or light cloth, owing to the little strain on the warps and cloth, great diiiiculty isV anisms of Taylor and Hurst, and Goldie; when there is a levei' supporting the journal of the ratchet-wheel the arrangement ofthe same is such as to cause it to operate as an obstruction to the back movement of the cloth-beam. A

In iny mechanism, as hereinbefore described, there is employed with the ratchet nocompound retainingpawl, such as is found described and represented in either of the said patents of Belli'ord or Richardson. lVith my invention the turning back of the cloth-roller is entirely under control, and in fact, instead of such roller being resisted in its backward movement, it by my invention is assisted in making sneh,one object of my invention being to avoid the resistance incident to those of Bellford, Taylor andHui-st, Goldie, and Richardson., whereby they are rendered incapable of heilig used to advantage, 'or are objectionable in the weaving of thin and light cloth.

In the drawing- A denotes the loom-frame.

B, the ratchet of the take-up mechanism.

C, .the impelling or draw-pawl of such ratchet.

D is the linger of thc stop motion or mechanism, such n'ger being projected vupward from a shaft, E,

O. composing part of such mechanism, as is well known.

As the take-up and thc stop motions or mechanisms are well understood by weavers and manufactuicrs of looms, it will be unnecessaryfor nie to further describe Athem, as l have exhibited in the drawing those elementary parts of them to which my apparatus or mechanism, to be hereinafter described, is directly applied.

The cloth-beam or roller is shown at F, and its op- I erating train of gears at Gand H, the ratchet B heilig fixed on the shaft I of the pinion H.'

The rctainiiig-pawl of the ratchet isshown at I as arranged on a stationary journal, a, and extended over the draw-pawl. l

The two pawls are raised at once out of engagement with the ratchet by means of an arm or`pawl-lifter, l, extended from the finger-shaft E, and underneath the alongside of, and diametri'cally and horizontally or' tbereabout across, the ratchet; and I pivot to one arnl ot such lever a pawl, c, to engage with the ratchet, such pawl being furnished with aspring,d, to preserve it in contact with the toothed periphery of the ratchet.

The range of vibration of the lever is limited by a stud, e, projecting from it into a slot, f, made in a standard, g, projecting from the loom-frame, all being arranged in manner as represented.

That arm of the lever L to which the pressure-pawl cis pivoted should be heavier than, or equal in weight with, the other arm'; or either may be weighted, as occasion may require. When the pawl-arm is the heavier of the two, or is weighted, the excess of weight will gperate to facilitate the back movement ofthe clothearn.

The third or pressure-pawl admits of the forward rotary movement of the ratchet produced by the drawpawl, and serves, by its friction on the ratchet,` to enable the weighted arm of the lever to aid in revolving the ratchet, and thereby facilitate the required back motion of the cloth-beam the distance suoli beam may have been improperly advanced by the action of the lay while the 'shuttle may have been improperly or unnecessarilymoved over the race-beam.

i/Vhile the ratchet may be advancing the pawl-arm of the lever L will be at its hghestelevation. As

lsoon as the draw and rotary pawls are lifted out of action with the ratchet the cloth-beam will be free to .uncut be moved back, and will be assisted in such movement by the excess of weight of the pawl-arm of the lever L over the weight of the other arm.

'I would remark that a spring applied to and forming part of the pressure-pawl is better than a weight, as it is more certain in its action, or will keep the pawl in contact with the peripheries'oi the ratchet to better advantage. The pawl, however, may be weighted or be of suilicient weight to enable the spring to be dispensed with; but it is far preferable to have a spring with the pawl in order to effect the proper degree of pressure of it against the periphery of the ratchet.

` l make no clair-.i to either ofthe mechanisms hereinbefore mentioned as found in the British patents of Bellford, Taylor and Hurst, and Goldie, or in the American patent of Richardson. i 'My mechanism contains a mechanical element or device not incident to either of the others, viz., a mechanism that either presents vno resistance to the back motion of the cloth-roller or operates to facilitate such. Therefore,

I claimv l rlhe lever L and its pressure-pawl c, the stud e and the slotted standard g, as arranged and combined with the ratchet B of the take-up motion, substantially as shown and described, such ratchet being provided with the pawls C I and-with the lifter K to be operated-by the stop motion, the whole being-essentially as and for the purpose or purposes as explained.

. VVANTON ROUSE.

Witnesses:

It. H. EDDY, 4J. R. SNOW.

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