US1880810A - Tension device - Google Patents

Description

4 Oct. 4, 1932. H. D. CLINTON 1,880,810

TENSION DEVICE Filed Nov. 11, 1930 alibi/"e134 Patented Oct. 4, 1932 Fries HARRY I). CLINTON, OF JOHNSON CITY, YORK TENSION DEVICE Application filed November 11, 1930. Serial No. 494,990.

This invention relates to tension devices and aims to provide improved means for tensioning yarn in feed operations such as warping and winding, especially where the feed is rapid and tends to increase the gatherings or discharge of lint from the yarn at points of friction for tension purposes.

It will be best understood by description with reference to the attached drawing illustrating one practicable embodiment in the form of a bracket attachable to a warping creel.

In said drawing:

Fig. 1 is a plan view representing a strand of yarn passing deflectively between tcnsioning elements of the improved character;

Fig. 2' is a sectional side elevation taken on the line 22 of the first figure andshowing the yarn in feed passage between said eleinents and Fig. 3 represents one of the tensioning elements in plan and side elevation respectively. The illustrative device comprises a pair of cup-like or frusto-conical discs l and 5 fitting substantially one within the other and movable independently on the same axis as common to devices of this kind.

Being apertured centrally for the latter purpose, they fit loosely over a retaining or guide post 6 disposed upright in this instance from a special form of bracket 7 attachable.

to a support. As the special form of this bracket is not an important feature of the invention, there is no occasion to describe the same in detail, but it may be remarked that said bracket provides guides and additional friction surfaces for the yarn where such are desired, as for example in certain warping operations.

The use of discs slidable on a post and yielding one from another against weight or spring action is of course an old expedient for tensioning yarn drawn therebetween and no claim to the idea broadly is made. Most prior devices of the kind however are subject to the objection of causing a discharge and gather ing of lint from the yarn passing there through, especially at the very high speeds attainable by comparatively recent improve ment in methods of warping. Such gatherings of lint tend to attach to the yarn feeding between thediscs and form what is known as slubs, which give rise to breakage and defects in the yarn and in cloth woven therefrom. In my "prior U. S. Patent1,762,049 dated J rule 8, 1930, is disclosed a tension deice of related characterdesigned to eliminate these lint gatherings by dropping through such particles as are not thrown-off by centrifugal force of rotation under action of. the feeding yarn. The present invention is a furtherdevelopment providing means minimizing if not entirely eliminating the discharge of lint from the yarn while tensioning it properly at high as well as low rates of feed.

This is accomplished byproviding one of the discs with a. tubular axial extension 8 through the other and engirdling the common retainer post for a liberal extent beyond the others plane. It is applied in this instance to the upper or outer disc (4). which in the illustrative device moves away from the other disc 5) as theyarn-is drawn therebetween. Fitted loosely around or over the post and 7 within the central aperture of saidother disc, it allows free-play movement of the two discs independently while serving also to guide; and steady the one.

The other disc (5)'is rested on'an accommodating ledge 9 in the bracketfor holding in place without need of iguidement by the retainer post, since ithas little if any axial movement although free to rotate by action of the yarn thereon; This permits its central apertureto be of a size leaving liberal space between it and said extension of the first disc, so that any lint particles may drop out through underlying web-openings 10' in the bracket (see Fig, r

A strand :11 of yarnis shown feeding deflectively between the discs asfrom a loaded spool to a warp beam. WVhile ordinarily guided to and fromthese tensioning elements, it is notso represented here because of th numerous ways and means of so doing.

As iir'other devices of the kind, the discs serve to' holdup the-strand when slacked from interrupted operationand to tension it during feed. Likewise; one of said discs (in lOO thereunder during feed, but acts to hold the yarn down yieldingly against said other by weighting or spring-depression variable ac cording to the desired tension. In feeding, the yarn of course tends to rotate the discs by the light friction therewith,

As distinguished from other devices however, the aforedescribed extension of the movable disc shields the retainer post toprevent contact of the yarn therewith, even though it may move said disc quite far away from the other. The yarn accordingly bears or deflects instead against this roller-like part rotatin easily with the disc. Suchobviation of I'll l) against a stationary element or surface between the discs minimizes the friction and so reduces the wear on the yarn as to virtually eliminate its discharge of lint parti-.

cles even at the highest rates of feed, while tensioning the yarn asefiectually as any similar device lacking this feature. 7

Such new lint particles as may be discharged areeither thrown off by centrifugal force of disc rotationor dropped out through the openings below the lower or inner disc (5) as previously stated.

It is believed the advantages of a device according to this invention will be apparent to anyone familiar with the textile industry and art, without necessity for further description. Obviously also, other embodiments with various changes inform and arrangement of parts may be made without departing from the scope of the invention, as for example, the retainer post may be of circular cross-section instead of square with rounded corners as shown in this instance, or the lower rather than the upper disc may carry the tubular axial extension. Further, the discs themselves might be given a shape similar to those shown in my aforesaid prior Patent No.

on the post in fit one within the other between which the yarn is frictionally drawn with capability of forcing themsubstantially apart under tension; the inner of said discs having a tubular axial extension through and bey'ond'the outer one at a substantial spacing from the surrounding edge thereof and slidably fitted on the post serving as a guide therefor against which they'arn in feeding between the discs may bear inrotative jaction thereupon without touching the post however much they may be forced apart.

4. A yarn tensioning device, comprisinga support brackethaving apost'extending rectangularly therefrom, and a pair of centrally apertured frusto-conically shaped discs rotatably centered on the post in; fit one Within the other between which the yarn is frictionally drawn with capability of forcing them yieldingly apart under tension; the outer of said discs being peripherally supported over an opening through thebracket and the inner of said disosbeing guided on V saidpost by a tubular axial extension thereof {slidably fitting onthe post in projection through and beyond the outer disc and at a substantial spacing from' the surrounding edge thereof over the aforesaid opening in the bracket. 7

. In testimony whereof I affix my signature.

I HARRY DFOLINTON.

1,7 62,049 dated June 3, 1930. Theappended claims are therefore not intended to limit the invention to the specific device or form there- 3 of herein illustrated.

Having thusdescribed my inventiomwhat I claim as new and desire to secure by Let ters Patent of the United States is: v

l. A yarn tensioning device, comprising a post and a pair of cup-like frusto-conically shaped discs centered thereon betweenwhich the yarn is drawn; one of said discs being adapted to fit within the other and having an axial tubular extension through said other at a substantial spacing from the surrounding edge thereof in sliding fit upon said post. 2. A yarn tensioning device, comprising a post, and a pair of rotatable frusto-conically shaped discs centered on said post in fit one within the other between-which the yarn is tensionally drawn with capability of forcing them substantially apart; the inner of said discshaving an axial tubular shank extending

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