US2285733A - Floating friction yarn tension - Google Patents

Description

June 9, 1942. Q MARTEL, JR 2,285,733

FLOATING FRICTION YARN TENSION Filed July 19, 1940 Ti 151i.

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40 jw dum-umii j 40 K 56 34 I I C .-32 4? Am %5 Q0 26 lNVENTOR Ednwar 0-MtZ/i8ljl' I AT RNEY Patented June 9, 1942 FLOATING FRICTION YARN TENSION Edmour'O. Martel, Jr., Ramsey, N. .L, assignor to Feldlinka Silk 00., Garner-ville, N. Y.

Application July 19, 1940, Serial No. 346,251

6 Claims.

The present invention relates to thread tensioning devices, and'it has specific relation to a floating friction yarn tension device that may be attached readily to any conventional winding or quilling machine.

Heretofore, it has been customary to use yarn tensioning devices on winding or quilling machines, but such devices generally employed a spring tensioning means or had an axially mounted shaft or stud-like projection for receiving and holding a plurality of tensioning weights in their proper positions against a fixed base plate or member. It has been discovered, however, that such devices slow up the movement of the yarn or thread, and have a tendency to become jerky at high speeds, producing an uneven tension especially when knots, twists and slugs (thelatter being the trade term for rough spots in yarn) are being passed therethrough.

An object of the present invention is the pro vision of a yarn tensioning device that is simple and inexpensive to manufacture, and economical and eflicient to operate.

A further object of the invention is to provide a yarn tensioning device having a freely movable or floating friction"- base that maybe easily and quickly assembled and attached to Fig. 1 is a perspective view of a yarn tensioning device constructed in accordance with my invention, which is shown suitably mounted upon a supporting bar by which the same may be attached to a conventional winding or quilling machine, and illustrating diagrammatically the op- I eration of the device in a conventional winding a conventional yarn winding or quilling machine.

Another object of the invention is the provision of a yarn tensioning device that not only has a floating friction base, but permits the shortest unobstructed passage of a yarn or thread therethrough, which short and unobstructed passage permits higher speeds of oper-'- ation than those formerly employed with conventional yarn tensioning devices of the character above described, thereby permitting greater production on identical winding or quilling machines.

A further object of the invention is the provision of a simple, compact and efilcient floating. friction yarn tension device that gives a steady even tension to the yarn or thread at high speeds, and which permits knots, twists and slugs to pass. therethrough while maintaining an even tension at such high speeds.

Other and further objects and advantages of the invention reside in the detailed construction of the device, which result in simplicity, economy and efficiency, and whichwill be apparent from the following description, wherein a preferred form of embodiment is shown, reference being had to the accompanying drawing, forming a part hereof, wherein like numerals indicate like parts, in which:

operation.

Fig. 2 is a cross-sectional view of the device shown in Fig. 1, the same being taken substantially along the line 2-2 thereof, looking in the direction of the arrows; and

Fig. 3 is another cross-sectional view of the device shown in Fig. 1, the same being taken substantially along the line 33 thereof, looking in the direction of the arrows.

Referring now to the drawing, there is shown in Fig. 1 a yarn tensioning device l0 mounted upon a suitable supporting bar i2, and illustrating diagrammatically its use in connection with a conventional spool or yarn spindle M, from which a yarn or thread i6 is being drawn for any suitable purpose under a constant and even tension, such as, for example, rewinding onto a larger spool or warp beam, which is diagrammatically indicated at Hi. When the yarn or thread I6 is being moved .in the direction of the arrows, it is obvious that it would have a tendency to unwind loosely from the spool or spindle I! if no tensioning means were employed, and that the slack so created would prevent an even and tight rewinding onto the larger spool or warp beam Hi. In order to prevent slack in the yarn or thread I6 and to insure that the same will-be wound upon the spool l8 with a uniform tension, the iioating friction yarn tension device It] is mounted between the spindle i4 and spool or warp beam I8.

It will be understood that the arrangement illustrated diagrammatically in Fig. 1 is merely for the purpose of depicting an embodiment of one use to which the tensioning. device maybe employed, and that many other uses may be found wherein it is desirable to place a moving thread under an even tension without departing from the spirit of the invention.

The floating friction yarn tension device It! consists of a base member 20 of cylindrical shape, which may be made of any suitable metallic material, desirably non-rusting. The base member 20 in the modification depicted is made of substantial thickness to provide a suitable attaching a threaded machine attaching bolt 24 by which it is suitab y fastened removably tothe supporting bar l2. The supporting bar I2 is provided with an aperture l3 for facilitating atto, and may be integrally formed therewith if desired. The sleeve member 28 projects above the base member 20 for a substantial distance, which distance may be predetermined by the thickness of the floating friction disc and the thickness and number of gravity weight members to be used in connection therewith to produce the amount of tension desired. A portion of the sidewall of the sleeve member 28 is suitably notched or cut-away, as indicated at 30, to facilitate insertion and removal of the floating friction disc 32 and the gravity weight membars 34, hereinafter to be described in greater detail. r

A pair of diametrically opposed apertures 36 and 38 are provided in the sidewall of the cuplike receptacle or sleeve member 28 in spaced relation to the notched or cut-away portion 30. The apertures 36 and 33 are disposed intermediate the bottom and top of the receptacle or sleeve member 28, and have integral external projecting flanges!!! extending circumferentially thereof. The apertures 36 and 38 and their respective projecting flanges 4B are provided internally with porcelain sleeves or eyelets 42, which are suitably secured therein in any conventional manner, such as being glued thereto, etc. These porcelain eyelets 22 have rounded edges, as indicated at 44, and provide a smooth substantially frictionless surface for guiding the yarn or thread l6 into and out of the device l0, thereby facilitating passage of the yarn therethrough without danger of cutting or otherwise damaging the same. Y

The "floating friction disc 32, which provides substantially a floating frictionless base for the yarn or thread it, is desirably made of glass. While plastic or other composition substances might be used satisfactorily for a short time, it will be found that they are too soft in texture to provide a durable disc. Consequently, if such types of discs are utilized, they must be frequently replaced as they become worn by the high speed movement of the yarn or thread is thereover. A worn disc presents a roughened surface which has a tendency to damage the yarn or catch the knots, twists or slugs causing jerks in the winding operation. The disc 32 is shown curved or beveled on its opposite edges to present a smooth curved surface to the yarn or thread, thereby eliminating any sharp corners which might have a tendency to cut the thread at times. While I- have shown both edges of the disc 32 curved or beveled, it will be obvious that only the upper edge, which contacts the yarn or thread, need be curved or beveled. I have found, however, that if both edges are curved when the disc is made no special care need be taken in assembling the device III to make sure that the curved edge is up against the yarn Ii as would be the case where only one edge had been curved or beveled.

The conventional gravity weight member 34 may be made of any suitable material, but I have found that if the weight member to be deposited directly on the yarn or thre'ad I6 is made of glass, better results are obtained. If additional tension is desired, additional weights may be employed, as indicated at 48, wherein the additional weight is shown in the form of a conventional washer. It is, of course, to be understood that if such weights are made of materials having dlfierent specific gravities or having different thicknesses, it is possible to increase or decrease the amount of tension imposed upon the yarn or thread l8 passing thereunder to any desirable degree.

In assembling the tensioning device ill for operation, the floating friction disc 32 is deposited in the cup-like receptacle 28 over the base plate 20, and the free end of the yarn or thread l6, as it unwinds from the spindle I4, is passed through the eyelet 42 mounted in the aperture 38 over the floating friction, disc 32 and out through the opposite eyelet 42 of the aperture 36 from which it is threaded to its starting position on the spool 18. One or more gravity weights 34 and/or 48 are thereupon deposited into the cup-like receptacle or sleeve 28 over the top of the yarn or thread l'6 passing over the disc 32. The number of gravity weights 34 to be positioned in the cup-like receptacle 23 depending entirely upon the amount of tension desired to be placed upon the yarn or thread It. 'Ihe tensioning device I0 is now ready for operation. By providing a freely movable or rotatable floating friction" bottom disc 32 for the yarn or threadit to pass thereover while passing under the gravity weight 34, I have found that the yarn or thread l6 may be rewound at a much more rapid rate of speed than was heretofore possible with the conventional tensioning devices above described, and that knots, twists and slugs will be passed therethrough uninterruptedly without causing any unevenness or jerkiness in the movement of the yarn or thread It or tension. The tension remains steady and even under all conditions of operation. In operations where a stop motion is frequently imparted and the yarn is subjected to violent movement due to the operation of the stop motion, .1 have found that my floating friction yarn tension device l0 prevents a hammeringaction to be set up, which, upon conventional types of tensioning devices above described, is sometimes sufficient to cut the yarn or thread 5. It will be noted that the yarn or thread 16 passes directly through the device H! in the shortest possible path, and is not subjected to a devious course around a shaft or stud such as encountered in conventional tensioning devices having an axial shaft for positioning and retaining the weights thereon. This feature, plus the unobstructed passageway for the yarn, is believed to facilitate the passing of the yarn or thread therethrough evenly at greater speeds than heretofore practiced, which increases the production 01' the machines equipped with my devices.

By use of the term "cup-like receptacle in the specification and claims, I do not mean to limit the invention to an open-top receptacle having closed sides, but it is to be understood that the term shall be construed generically and to include any kind of a. receptacle capable of retaining the disc and weights therein, such as, for example, a base member having a series of upstanding clrcumferentially spaced pe s, or a lattice like sidewall construction, which is capable of retaining the members in their respective positions of operation.

Although I have only described in detail one out departing from the spirit thereof or from the scope of the appended claims.

What I claim is:

A tension device of the character described comprising a cup-like receptacle having an inlet and outlet port extending through its side thereof in diametrically spaced relation, said ports having a non-metallic sleeve, a non-metallic disc member mounted freely within said receptacle, and a non-metallic gravity weight member mounted freely within said receptacle and adapted to apply pressure on the yarn passing therethrough. I

2. A tension device of the character described comprising a cup-like receptacle, a disc member mounted freely within said receptacle over which the yarn to be tensioned is adapted to be passed in the shortest possible path, and a gravity weight member mounted freely within said receptacle and adapted to apply pressure on the yarn passing therethrough.

3. A tension device of the character described comprising a cup-like receptacle having means for fastening the same to a supporting bar, 'diametrically spaced inlet and outlet ports mounted in its sides, a disc member mounted freely within said receptacle over which the yarn passing through said device is adapted to be moved diametrically in the shortest possible path, and a weight member mounted freely within said receptacle to apply pressure on the yarn as it is passed over said disc member,

4. A tension device of the character described comprising a metallic cup-like receptacle having oppositely positioned inlet and outlet ports mounted in its sidewalls thereof, a glass disc member mounted freely within said receptacle over which the yarn passing through said device is adapted to be moved, and a glass gravity weight member mounted freely within said receptacle to apply pressure on the yarn as it is passed over said disc member.

5. A tension device of the character described comprising a cup-like receptacle having closed upwardly extending sides, a portion of one side being cut-away to afford access to said receptacle, oppositely spaced ports extending through said closed sides, said portsbeing lined with nonmetallic sleeves, a non-metallic disc member mounted. freely within said receptacle and below said ports over which the yarn passing through said device is adapted to be moved, and a gravity weight member mounted freely within said receptacle for applying pressure on the yarn as it is passed over said glass disc member.

6. A tension device of the character described comprising a metallic cup-like receptacle having and open-top and closed upwardly extending sides, one side having a portion thereof cutaway to afford access to said receptacle, diametrically spaced inlet and outlet ports extending through said closed sides and lined with nonmetallic sleeves, a glass disc member mounted freely within said receptacle and below said ports over which the yarn passing through said device is adapted to be moved, a gravity weight member mounted freely within said receptacle for applying pressure on the yarn as it is passed over said glass disc member, and fastening means mounted on the underside of said receptacle for securing the same to a supporting bar.

EDMOUR O, MAR'IEL, J a.

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