US1536827A - Loom - Google Patents

Description

May 5, 1925.

C. H. DRAPER Filed March 17', 1921 v I J- with/e66:

Patented May '5, 1925.

- CLARE H. DRAPER, or HOPEDALE, MASSAGHUSETTS,'ASSIGNOR TO HoPEnaLE MANU- FACTURING COMPANY, or MASSACHUSETTS.

MILFORD, MASSACEUSETTS, A coaroaawion or Loon.

Application filed March 17, 1921. Serial No. 453,077.

T all whom it may concern Be it known that L 'cLARE H. DRAIER, a citizen of the United States, residing at Hopedale, in the county of Vorcester and State of Massachusetts, have invented certain new and useful Improvements in Looms; and I do hereby declare the followingto be-a full, clear, and exact description of the invention, such as will enable others skilled in the art) to whichlit appertains to make and use the same.

Q Thepresent invention relates to an improvement'in looms. I v

Heretoforegin the operation of a loom the cloth standsfast at the-breast beam and is onlytakenaip thereas' it is advanced by the beat of the lay, as a consequence of which owing to the shedding operations thelength of the warp from the fell to the whip roll is lengthenedand shortened at each shedding operation. This is compensated for by anountingthe whip roll so. as. to. yieldingly resist the pull of the warp exerted by. the. shedding operation. *Therefore the warps. advance and retreat slightly through the.

drop wires and harnes'ses, thus sawing or reevingback andforth as a result of which they are worn more orjless, sometimes to theextent of seriously weakening them and facilitating or causing breakage. f

The-object of the present invention is to produce at 100111 'havingmeans for automatically taking up and letting out the cloth after it is woven near or at the breast beam so as to reduce the amount of reeving or sawing. through the drop wires and harnesses.

The invention consists in the loom here-' ,inafte-r described and particularly defined in the claims.

In the accompanying drawings illustrating the preferred form of the invention Fig. 1 is a longitudinal, sectional, diagrammatic elevation of a loom; Fig. 2 is a plan of the warp beam and associated parts; andv Fig. 3 is a sectional elevation of a cloth take-up and let-out device on a larger scale than that shown in Fig. 1 for the purpose of. more clearly illustrating the construction. The illustrated embodiment of the invention is described as follows: From the Warp beam 1' the warp extends up over the whip roll 2,- yieldingly' supported in operative po- Sition by the spring 3 i the us l manner.

"lhence the warps extendthrough the drop wires 1 0f the warp stop motion and over and under lease rods 5 and 6 to the heddles 'or harnesses 7 and 8 thence through the reed 9 of the lay 10 to the fell from which the cloth extends tothe draw rollll and to the wind-up roll 12 at the front ofthe machine. Just in the rear of the breastbea'm 13 is mounted the cloth take-up and let-out device which consists generally of a channel bar arranged concave side up, over the edges of which the cloth extends. Centrally disposed above the open side of the channel is a yieldingly supported take-up bar which rises and falls as the tension onth'e cloth is in: creased and decreased by the formation of the sheds.

In detail this cloth take-up and let-out de vice is describedlas follows:- A supporting bar 20' bolted at 21 at its ends to thebr'east beam is provided which extends rearwardly downwardly' and transversely across the loom under the cloth. This bar 20 may con veniently be termed the cloth take-up and let'out supporting bar or the channel sup port. "To this bar 20 is attached'a channel bar 22 which is secured to the bar 20 at each end by bolts 23 which are screwed into the cross bar 20 and down on the bottom of the channel bar 22 so as thereby to hold; the channelbar rigidly in position, its up r: edges engaging the under surface of the cloth as it approaches the draw roll or breast the take-up 'bar 24, said take-up bar being provided with two holes adapted'to loosely receive thebolts23. Each bolt 23 is embraced by a spring 25 which engages the take-up bar at its lowerend and a washer at its upper end, which latter forms an abutment for the spring and is secured in place by a nut 26. The pressureof the springs 25 on the take-up bar 24% is such as to depress the cloth slightly between the edges of the channel bar 22 and thereby bend the cloth or deflect it out of its normal position, that is out of a straight path from the fell to the draw roll. I

Thegoperation of this loom in so far as it is modified by the presence of this cloth take-up device is as follows: Assuming the position of the parts as shown in Fig. 1

with a shed formed for the passage of the shuttle from one side of the loom to the other, the tension on the cloth induced by the draw roll supports the take-up bar in such position that the pressure of the cloth against the bar equals the pressure exerted upon the bar by the weight of the bar and the pressure of the springs exerted thereon. Now as the heddles move past each other vin opposite directions to form a new shed they thereby lengthen the distance from the fell to the lease and this permits the fell to move toward the draw roll under the influence of the pressure of the take-up bar exerted on the cloth, which take-up bar moves downward slightly into the channel bar 22 and thereby takes up a portion of the increased length of warp between the fell and the lease at the warp beam, thereby diminishing the amount of reeving or sawing of the warps through the eyes of the thread supports, i. e., the harnesses and drop wires As the heddles pass each other to form the new shed they again exert a pull upon the warps and pull the fell rearwardly in the machine, thereby lifting again the take-up bar and causing it to give up the cloth which it had taken up in its downward movement.

It is apparent that a considerable part of the reeving or sawing of the warps through the harnesses and drop, wires is eliminated by this construction with the important result of diminished wear upon the warps, due to such reeving and sawing, is accomplished.

The particular form of take-up and letoutdevice applied to the cloth at the breast beam to take-up cloth as the shed closes and give up cloth as the shed again opens is immaterial to my invention viewed in its broader aspects, which contemplates broadly providing the loom at the breast beam with means for taking up cloth as the shed closes and giving up cloth as the shed opens so as thereby to reduce the reeving and sawing of the warps through the harnesses and drop wires.

Having thus described the invention, what is claimed is:

1. A loom having, in combination, a

breast beam, a lay, heddles and drop wires,

and a cloth take-up and let-out consisting of threemembers, two of which engage one side of the cloth near the breast beam and the third of which engages the cloth be tween the first two, and means for yieldingly pressing the members toward the cloth so as thereby to take up cloth when the shed is closed and give up cloth as the shed is opened.

2. A loom having, in combination, a breast beam, a lay, heddles and drop wires, and a cloth take-up and let-out consisting of a channel bar supported with its edges in contact with one surface of the cloth, a take-up bar supported with its surface in engagement with the opposite surface of the cloth between the edges of the channel bar, and springs for yieldingly pressing the channel bar and take-up bar toward each other to take up cloth as the heddles close and give up cloth as the heddles open.

3. A loom having, in combination, a breast beam, a lay, heddles and drop wires, and a cloth take-up and let-out device supported inposition in the rear of the breast beam comprising a channel bar having its edges in engagement with the under surface of the cloth, a take-up bar having a portion engaging the upper side of the cloth between the edges of the channel bar, and springs for yieldingly pressing the take-up bar against the cloth.

CLARE I-I. DRAPER.

Images