US1562071A - Thread-tensioning means - Google Patents

Description

Nov. 17, 1925. 1,562,071

J. BARNES THREAD TENSIONING MEANS Filed July 10. 1923' Patented Nov. 17, 1925.

Unirse stares JOSEPH BARNES, OF .N'EN BEDFORE, MASSACHUSETTS, ASSIGNOR TG L. V. B. TENSION COMPANY, OF NEW BEDFORD, MASSACHUSETTS, A CORPORATGIT 'OF MASSACHU- SETTS.

THREAD-TENEEONENG- MEANS.

Application filed July l0, 1923.

The invention comprises various improvements which have been designed primarily for application in connection with tension devices of the type of those shown and described in U. S. Letters Patent No. 1,356,026, dated Oct. 19, 1920, and No. 1,393,926, dated Oct. 1 3, 1921.

Tension devices of the type just referred' to comprise a bearing surface, bed, or backing, and a presser which is lightly borne toward such surface or bed, the yarn or thread passing between the two. The later form of device which is illustrated in Patent No. 1,393,926, comprises a weighted presserlever, and a yarn or thread-engaging presser pivotally mounted on said presseiklever adjacent the opposing surface or bed, and having a yielding face making a two-point contact with the said surface or bed.

One drawback in the use of tension devices in general is a tendency to collection of lint at a tension device, alongside the running yarncor thread, portions of such lint at intervals passing onwardwith the yarn or thread and sometimes remaining in the form of slubs or slugs attached thereto as wound, with the result that when the wound yarn is used subsequently in the manufacture of cloth the character and quality of the latter are injured by the said slubs or slugs. One object of the present invention is to improve the tension devices of the patents aforesaid so as to avoid this drawback by making effective provision adjacent the point or points of contact for escape of lint so that itdoes not collect at such points, and consequently cannot form slubs or slugs.

Another object of the invention is to render a tension device of the type of those yof the Letters Patent aforesaid automatically or self-threading. for adjustments to accommodate supply-` Another is to provide Serial No. 650,637.

bobbins of different lengths. Another is to give the lpresser a. capacity to rock transversely. Another is to provide for the convenient connection of the presser rwith the presser-lever, and disconnection therefrom.

The accompanying drawings show an illustrative embodiment of the features ofthe invention. In the saidV diawings,-.-

Fig. 1 is a side' view of a ytension device and a stand or bracket containing the said features, showing also a supply-bobbin, a receiving spool, and certain parts belonging to a yarn-spooler.

Fig. 2 is a plan view of the tension device.

Fig. 3 is a view in vertical section in the plane indicated bydotted line 3,3, in Fig. 2.

Figs. t and 5, respectively, are views in section on line 4f, 4:, and 5, 5, of Fig. l.

Having reference to the drawings,-

The supporting-stand or bracket comprises the main member 2, the bobbin-supporting' member 3 and the member 4 supporting the tension means, the three members being combined with one another with capacity for adjustment to accommodate bobbins of various lengths. f l

In this instance the main member 2 is provided with a notch 21 in its foot-portion to permit it to be mounted upon a supporting-'rod 5 in a yarn-spooler, or the like, such member being held in place on such rod by a clamping screw 6.

The bobbin-supporting member, or hanger, 3, is applied in the present embodiment to member 2 near the lower end of member 2, and isv provided with a short spindle 7 of suitable size and length to enter the bore of a supply-bobbin 71. For adjusting 'the height at which the bobbin is supported, or to accommodate bobbins of different lengths, a slot 22 is made in member 2 to receive the bolt 8 securing this hanger 6 to member 2. This 'slot extends lengthwise of member 2, at a slight outward inclination. It permits the hanger 3 toV be moved up or down iuitil correctly positioned, notches 23, 23, being provided in one side of member 2 transversely of the-slot (as indicated by dotted lines in Fig. l) to receive a rib or ribs 2st (shown by dotted lines) formed on the adjacent face of an ear of hanger 6 to hold the two parts' firmly in adjusted relations.

I provide, in addition to the provisions .described above fof'adjusting the hanger 3 up down upon the member 2, a supplementary adjustment in the manner of combining members 2 and Ll. To this end a slot 25 is formed in the upper end of member 2 for the bolt 26 which unites the two members. This slot extends longitudinally of member 2, at a slight outward inclination, as shown. 1t permits the shifting of the clamping bolt 2G, and consequently the head with its tension device, relative to the main stand-mem ber 2. Notches 23 and a rib or ribs 24C, shown by dotted lines, prevent accidental loss of adjustment.

The tension-producing means is located upon the head 11 of the upper member 1, the said head having at its front end a fork constituting an open guide 9 which is occupied by the yarn or thread c passing from the supply-bobbin 71. The said yarn or thread passes up through the said open guide or fork between the two prongs or branches 91, 92, thereof.

As in Letters Patent No. 1,393,926 a plate 12 of wear-resisting material is set flush in the top of the head, and the presser 13 of the tension producing means normally bears against the surface of such plate. On its way toward the rear of the said head the yarn or thread passes between the presser and the said surface. rifhe presser 13 in this instance., like that of Patent No. 1,393,926, has the face portion 131 thereof constituted by a resilient spring member having transverse convex bearing ribs 130, 130, to contact with the running thread or yarn, the yielding compression of the yarn between these bends and the underlying plate 12 operating to produce friction sutiicient to establish the desired degree of tension of the yarn as it leaves the head. Herein, as in Letters Patent No. 1,393,926, the elast-ic strip constituting the face-portion of the presser is secured at one of its ends to one end of the presser-body 14, the latter being pivotally mounted on a pintle 15 projecting trans versely over the head, and parallel thereto, from the presser-lever 16. This presser lever 16 is pivoted to the side of member 4l at 17, just below the surface of the head, and is provided with a weight 18 which may be adjusted forward or backward along a slot 19 in the lever to either side of the pivot 17, to add to or reduce the pressure of the resilient spring or presser 13 upon the yarn or thread beneath it. The weight 18 is conveniently adapted to be fixed at any point in the slot 19 by being drilled and tapped, as shown in Fig. 5, to receive a screw 2O having a flanged head at the back of the carrying lever, and also having its stem slabbed olil on opposite sides of its length so that it cannot revolve in the slot 19. Thus, rotation of the weight by hand in the proper direction serves quickly and easily to clamp it tightly to the lever 16 to hold t-he weight in place upon tl e lever, or loosen it to permit of adjustment of the weight along the slot 19 into the relations to lever-pivot 17 required to give the desired action upon the yarn or thread, The features just described providing for adjustment of the weight 18 are not claimed herein because they are the subject of claim in my application for U. S. Letters Patent filed Mar. 21, 1925, Serial No. 17,253.

To prevent the accumulation of lint from the thread or yarn at the convex ribs 130, 139, of the presser, and guard against its subsequent adherence to the yarn in the form of slubs, l provide slots or apertures 27, 28, one thereof in advance of the leading rib and the other thereof between the two ribs, to permit. downflow of portions of the cur rent of air produced by the moving yarn or thread, carrying away such lint as may work oif from the running yarn adjacent the ribs and between the presser and the plate 12. These slots or apertures 27 28, may be of any desired shape or disposition. In the present embodiment two such slots or apcrtures are shown, correspending` with the number of convex ribs 130, 130, provided on the particular presser illustrated, the forward slot 27 beingl formed through'the metal of the head immediately in front of the forward end of plate 12, for the full width of said plate; and the aperture 28 being formed directly through the plate 12 and underly ing metal of the head, intermediate the two ribs. 1t has been found in practice that the running yarn passing over the slots or apertures creates downward currents of air therethrough, which serve very satisfactorily to carry any accumulated lint down with it and away from the yarn, clearing the yarn and the friction-creating parts of the device.

In the present invention 1 have combined with the tension device as described above, means by which the thread or yarn from the bobbin is caused to enter automatically between the aresser 13 and the plate 12, inerely as a result of being entered between 'the two prongs 91, 92, at the front of the head, and drawn in a general rearward direction in being wound upon the receiving spool 199, Fig. 1. rlhs provision does away with all loss of time incident to performing the threading operation by hand. 1n accordance with the invention, a dciecting edge 31, which may be of any suitable design and in its preferred form, as shown herein, cornprises a bent wire, entends from a point to the left of the guide-,notch 9 between prongs' 91, 92, above the plane of the head, across the space lying between the said prei i laterally outward to the right aro presser 13,-thenee rearwardiy to a poivthe rear of the presser 13, as well as c se to the said plane of the head and plate 12, having always a smooth cf tov-fard the rear of the device, and their reversely across behind the presser2 Thus, when. the thread the yarn or thread rises away troni the plane c ot the head. This guide 32 is located directly rearward 4ot and closely adjacent ltothe rear end ot' presser 13. The lateral extremities ot the convex ribs 130, 13G, formed on the presser preferably are beveled or rounded ofi `at the side of the presser which is toward the detleeting edge 31, so that the thread or yarn slips easily between the presser and the plate 12 in its eiort to straighten its line yof travel between guide 9 and the guide 32 in being drawnv rearwardly.

In its preferred form the device also comi bines with the detlecting edge 31 a curved guard 33 of any suitable material. preferably a wire similar to that used for the said deliecting et ge,and extending from a point on the prong 91, around the presser laterally outside ot the said detleeting edge 31 and substantially parallel thereto. The rearward extremity of this guard 38 is engaged with the head lat the rear of the presser. As the yarn or thread is drawn rearwardly over the head and around `the deiiectfing edge 31 for the purpose ot causing the device to thread itselt, this guard contines the yarn k.or thread closely to the deflecting edge 31.

To limit the ballooning of the yarn as it unwinds from the bobbin. a web /lti is con structed on the under side of the head at one side of the line of travel ot the yarn or thread on its `way from the bobbin to the guide 9, the prong 92 in the present embodiment, in position to be struck by the running yarn as soon as the latter begins to circle at all widely, to thereby curbor damp the ballooning action. l

To provide for the lateral rocking aforesaid of the presser in conjunction with its longitudinal swinging movement, the presser and its suliporting pintle or stud are fitted to each other to give the presser capacity for suoli rocking. In this instance, as illustrated in Fig. d, the said pintle or stud is barrelsliaped in that portion thereotl on which the presser-body 14 is mounted, the hole through said body being parallel-sided, or substantially so. This permits the said rocking.

The presser-body preferably is composed of a strip of spring material, steel for instance, one portion of the length thereof being bent back upon the other, as shown, a

bearing to tit :thelsu-pportmg pintzle or stud being formed by bending lthe strip. In" this instance such bearing is produced by a bend in the back-folded upper portion of the strip. The supporting lpintle or stud formed witha shoulder for engagement lwith one edge of the presser-body, and with a head at its outer end tor engagement with. the other edge ot' the presser-body, said shoulder and lhead serving to prevent the presser from Abecoming laterally displaced and from coming oli the supporting pintle or stud. The elasticity ot the material of the presser-body permits the upper. and lower portions thereof to be sprung Yapart through the applicationof slight torce, so as to enable the head of the supporting .pintle or stud to pass through between such portions in mounting the presser upon the sai-d pintle .or stud, and in idismounting itgtherefrom.

What is claimed as my invention is 1. A tension device comprising, in combination, a plate yover which the yarn or thread is adapted to pass, a presser provided with la yielding tace Vplate cooperating with said plate, said tace plate having fone or more convex ribs to press the yarn or thread aga-inst the sai-d plate, and said plate iii-st mentioned having :a slot or slots ladjacent the said convex rib or ribs through which portions ot the current of air produced bythe traveling yarn or .thread :escape carrying with them particles of lint.

2. A tension device comprising, in combination, a plate over which the yarn is adapted to pass, a presser cooperating wit-h said plate, a yarn guide in line with said presser, means rendering the device seltthreading comprising a deflect-ing edge extending from a point in front of and to one side ot' the guide and above the plane of the said plate, across in front ot' the presserto a point laterally beyond the presser, reversely across at the rear ot the presser, and down to the plane ol the said plate and a guard commencing at the opposite side of the first-named guide from that on which the said detlecting edge begins, and extending around to the rear of the presser.

3. A tension device comprising in combination, a plate, a presser cooperating with said plate` a yarn guide in front of said presser, and means rendering the device selfthreading comprising a deiiecting edge eX- tending from a point in front of and to one side ot the guide and above the plane of the said plate, across in front of the presser to a point laterally beyond the presser, reversely across at the rear of the presser, and down to the plane ot the said plate, with an upward bend forming a guide for the yarn after it has passed around the said defiecting edge and entered between the presser and plate.

4. tension device comprising, in coinbination, a plate, a presser' cooperating with said plate, a yarn guide in front of said presser, means rendering the device selfthreading comprising a ydeflecting edge eX- tending across in front of the presser, along one side thereof, and reversely across at the rear thereof, and sloping downward to the surface of the said plate, with an upward bend forming a yarn guide at the rear of said presser` and a guard c mmencing at the opposite side of the first-named guide from that on which the said detlecting edge begins, and extending around to the rear of the presser. Y

5. In combination, a stand or bracket adapted for attachment to a spooling machine or the like, comprising a main meinber, a bobbin supportingmember, and a member' provided With tension means, and means combining both of the other members With the main member with capacity for individual adjustment thereof to suit bobbins of varying lengths, such means comprising upper and lower slots`r bolts occupying such slots and fastening the other two members in adjusted position upon the main member, and intermeshing ribs and notches upon the respective members holding the members from turning displacement relative to one another.

6. A tension device comprising, in combination, a backing for the yarn or thread, a presser cooperating with the surface of said backing, and a presser-lever having a laterally extending pivotal stud on which said presser is mounted to swing, said stud shaped to permit lateral rocking of the presser in conjunction With its swinging movement.

7. A tension device comprising, in combination, a backing for the yarn or thread, a. presser-lever, and a presser cooperating with the surface of the said backing and engaged With the presser-lever in manner permitting swinging movement of the presser lengthwise of the yarn or thread and rocking movement transversely thereto.

8. A tension device comprising, in combination, a backing for the yarn or thread, a presser-mounting, and a presser having a yielding face which cooperates with the surface of said backing, said presser-combined with said mounting in manner permitting swinging movement of the presser length- Wise of the yarn or thread and rocking movement transversely thereto.

9. A tension device comprising, in combination, a backing for the yarn or thread, a presser cooperating with the surface of said backing, and a carrying member having a laterally extending pivotal stud formed With a barrel-shaped portion on which said presser is mounted to swing longitudinally as Well as roch transversely.

10. A tension device comprising, in combination, a backing for the yarn or thread, a presser cooperating With the surface of said backing and having a body portion composed of a spring strip folded back upon itself and bent to form a transversely extending bearing, and-a headed supporting pintle or stud, the elasticity of said spring strip permitting the head of said pintle or stud to be forced through between the two portions of the strip in assembling and disassembling the parts.

I 11. A tension device of the character described comprising a head having a transverse presser-bearing, a presser, a presserlever having the presser pivotally connected therewith and also having a transverselyextending lever-pivot which occupies the said presser-bearing, and a screw entering a threaded axial hole in the said lever-pivot, With a fla-nge engaging With the head to -prevent accidental transverse displacement of the presser-lever' and presser.

JOSEPH BARNES.

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