US2468524A - Vibration preventer for bobbin magazines - Google Patents

Description

April 26, 1949; R. G. TURNER 2,468,524,

VIBRATION PREVENTER FOR BOBBIN MAGAZINES Original Filed June 28, 1947 2 Sheets-Sheet 1 I-NVENTOR RICHARD G. TURNER ATTORNEY April 26, 1949- R. e. TURNER 2,468,524

VIBRATION PREVENTER FOR BOBBIN MAGAZINES Original Filed June 28, 1947 2 Sheets-Sheet 2 FIG. Fl.G.l2

FIGJO INVENTOR inc/14 RD 6. TURNER ATTORNEY Patented Apr. 26, 1949 VIBRATION PREVENTER FOR BOBBIN MAGAZINES Richard G. Turner, Worcester, Mass, assignor to Crompton & Knowles Loom l/Vorks, Worcester, Mass, a corporation of Massachusetts Original application June 28, 1947, Serial No.

757,875, new Patent No. 2,455,149, dated November 30, 1948. Divided and this application May 29, 1948, Serial No. 30,091

3 Claims. 1

This is a division of my copending application Serial No. 757,875, filed June 28, 1947, now Patent No. 2,455,149.

This invention relates to improvements weft replenishing looms and it is the general object of the invention to provide an improved reserve bobbin magazine.

The diameter of the weft wound on the re serve bobbins in a weft replenis ing mechanism may be larger than, equal to, or: smaller than diameter of the bobbin butts. Furthermore in the weaving of certain types of fabrics it not permissible to have knots or the like in the weft because of blemishes which they would produce the finished fabric. When the yarn breaks during the winding of a bobbin to be used in the weaving of such fabrics the bobbin is removed from the winding machine and sent to the loom, even though the bobbin be only partly wound. Under such conditions the magazine will contain bobbins some of which are fully wound and others of which have only a short mass of weft thereon. The full and partly wound bobbins, regardless of their weft diameter, will not stack properly, and the upper bobbins will have their tips so far below their butts that they fall out of the magazine.

It is an important object of the present invention to provide a bobbin magazine with readily adjustable guideways for both the butts and tips of the bobbins so that by a simple manual operation the weaver can adjust the widths of the guideways to a condition which will enable the bobbins to lie substantially horizontally and therefore feed downwardly toward transfer position without falling out of the magazine. Thus, if several partly filled bobbins are in the magazine the tip guideways can be made narrow to raise the tips and prevent objectionable tilting of the upper bobbins.

Since the bobbin conditions change from time to time as new bobbins are placed in the magazine it is desirable that the widths of the guideways be readily adjustable, and it is a further object of the invention to accomplish this result by means of yielding locks which can be moved quickly easily to alter the widths of the guideways.

In the weaving of fabrics requiring two shuttles a rocking magazine may be employed which can be shifted to place the lowest bobbin in either of the two bobbin stacks in transfer position. This requires a pivot for the magazine and also generally requires that the outer or bobbin tip engaging plate oi the magazine be supported from the inner or butt engaging plate of the mega-- zine. When magazines of this type are made large enough to accommodate a considerable number of bobbins it is found that the outer plate tends to vibrate, and to correct this condition it is a further object of the present invention to pro? vide anti-vibration guides, such as rolls, positioned to engage theinner plate of the magazine.

It is occasionally desirable to be able to effect slight adjustments in the vertical. position of the magazine and to accomplish this result it me further object of the present invention to form the aforesaid pivot of the magazine as an eccentric to enable the magazine to be raised or lowered to place the bottom bobbins in transfer position correctly with respect to the shuttle on the lay. Any horizontal displacement of the lower end of the magazine caused by adjustment of the eccentric can be corrected by adjustable. stops, which determine the two extreme angular positions to which the magazine can be swung.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth.

In the accompanying drawings, wherein a convenient embodiment of my invention is set. forth,

Fig. 1 is a side elevation partly in section of the forward part of a loom equipped with a magazine made according to the present invention,

Fig. 2 is an enlarged front elevation of the magazine looking in the direction of arrow 2, Fig. 1,

Figs. 3 and 4 are side elevations, partly in section, looking in the directionsof arrowsv 3 and 4, respectively, of Fig. 2, Fig. being enlarged,

Fig. 5 is an enlarged horizontal section on line 55 of Fig. 3 showing the adjustment for O e of the butt guideways,

Fig. 6 is an enlarged horizontal section on line t-l5 if Fig. 1, showing the adjustment for one. of the tip guideways,

Fig. 7 is an enlarged vertical section on line 'i'l, Fig. 2, i

Fig. 8 is a vertical section on line ll8, Fig, 7,

Fig. 9 is an enlarged vertical section on fline 9El, Fig. 3,

Fig. 10 is a diagrammatic view showing the normal relation of bobbin butts and tips when the bobbins are fully wound, the weft and butt diameters being the same,

Fig. 11 is a diagrammatic front elevation of a magazine containing partly filled bobbins as they appear before adjustment of the tip guideway, and

Fig. 12 is a view similar to Fig. 11 but showing the bobbin tips raised subsequent to reductionin the width of the tip guidewayf Referring to Fig. 1, the loom frame It has mounted thereon a support H for the magazine designated generally at M. The latter is pivoted on a stud l2 extending through a hub it on the magazine support, see Fig. 9. The magazine has an inner or butt engaging plate M and an outer or tip engaging plate I5. Plate 14 has front and back bobbin butt guideways l5 and ll, respectively, while plate !5 has front and back bobbin tip guideways l8 and 19, respectively.

The bobbins B and B in the two stacks feed down their respective front and back guideways by gravity toward transfer positions, one at the bottom of each of the bobbin stacks, as will be apparent in Fig. 3, to permit a transfer arm 23 to transfer the bobbin under it in transfer position into one or the other of two alternately active shuttles only one of which is shown at S. The shuttle when at the replenishing end of the loom occupies shuttle box 2| on lay L.

The bobbins have butts or heads 22, a mass of yarn Y, and tips 23. The lower part of the inner plate It is provided with a spacer lug 25 which separates the lowest bobbins of the two stacks, and front and back bobbin butt supports 26 and 21, respectively, may be mounted in usual manner to yield whenever the lowest bobbin in the associated guideway or stack is being transferred. In similar manner, the tips of the bobbins may be held by yielding supports 28 and 29 mounted pivotally on the outer magazine plate lb.

The magazine is ordinarily at rest in the position shown in l, but can rock about stud it. When a replenishing operation is to occur the magazine will remain in its normal position if the rear lowest bobbin B is to transferred, but if the lowest bobbin B is to be transferred the magazine will be rocked. The rocking mechanism includes a rod 30 pivotally connected to plate 14, a second rod 3! operated by the shifting shuttle box motion (not shown), and a bell crank lever 32.

Except as indicated hereinafter the matter thus far described may be of the usual construction and operates in the usual manner.

As already stated, the magazine can operate with various types of bobbins which, because of the diameter of their yarn masses Or amount of yarn thereon, may not stack properly or feed properly down their guideways toward transfer position. The yarn diameter may be greater or less than the butt diameter or equal to it, and the bobbins may be either fully wound with weft extending practically the full length thereof, or only partly wound. The magazine may thus be supplied with an assortment of bobbins, some full and others only partly full. If a large number of partly full bobbins are present the tip ends of the upper bobbins will slant downwardly far enough so that they can roll out of the magazine and with such a group of bobbins it will be desirable to make the tip guideways narrow. If the yarn diameter is less than the butt diameter it will then be additionally desirable to widen the butt guideways.

In order to adapt the magazine for proper operation with these various types of bobbins I make each of the guideways adjustable as to width. Considering the forward butt guideway It, for instance, the inner magazine plate 54 is formed with an integral flange or wall for the right hand parts of the bobbin butts in the left stack as viewed in Fig. 3, and the lower left part of guideway 16 may also be defined by a second integral flange or wall 36. The upper left hand part of the guideway, however, is formed by a movable wall 3! the lower end of which is pivoted as at 38 to the plate l4.

The upper part of the movable wall 31 is held in position by means shown more particularly in Fig. 5. The plate It is provided with a horizontal slot 5E} and a series of holding teeth 4| on the inner or left hand side thereof, as viewed in Fig. 2. The wall 37! has a flange 22 lying flat against the surface 53 of plate M. Bolt 35 passes through the flange 62 and slot 36 and has its outer end surrounded by a compression spring located in the cylindrical shell or cup 41 of a yielding lock or holding member 38. The latter has teeth 49 which are normally urged into holding relation with teeth M by the spring.

The movable back wall 58 for the rear guideway if is similar to the wall 3? except that its pivot 5i is lower than pivot 33. It is also held adjustably in position by mechanism similar to that shown in Fig. 5.

In like manner, the outer magazine plate I5 is provided with adjustable front and back walls 55 and 555, respectively, to cooperate with flanges or walls 5? and 58, respectively, integral with plate l 5 to define the bobbin tip guideways. The walls 55 and 55 are pivoted as at 5B and have bolts ii, see Fig. 6, provided with the same character of fittings shown in Fig. 5 and passing through slots 62 in plate it.

From the matter thus far described it will be apparent that each of the adjustable walls 37,

55 and 56 can be moved readily from one position to another merely by movement of the adjustable clamping or locking members 4'3 in directions to release teeth ts from teeth 4|. After the walls have been moved to their new positions the members 48 can be released, whereupon their springs will reengage teeth 3! and 9 to hold the movable walls in their adjusted positions.

Diagrammatie Fig. 10 shows the normal arrangement of the bobbins when they are all fully wound and of a given weft diameter, as for instance when the latter equals the butt diameter.

Both the butt and tip guideways will be flared so that their walls diverge upwardly to permit the bobbins to be staggered to prevent rolling due to loom vibration. If the bobbins should not all be fully wound, and two of them have short masses of weft as in Fig. 11, the top bobbins will be tilted and will tend to fall out of the magazine. Under these conditions the tip guideway will be too wide, and its movable wall will be moved toward the fixed wall, thereby causing the tips to rise as they come more nearly into vertical alignment. The bobbins will then be in positions such as shown in Fig. 12, and will be in proper position for correct downward feeding.

A similar adjustment can be made if the yarn diameters are larger than the butt diameters and some of the bobbins are only partly wound. If movement of the adjustable tip wall does not give all the correction needed the movable butt wall can be moved away from its fixed wall. These adjustments can be made even if the yarn diameter equals the butt diameter, provided some of the bobbins are only partly full of weft.

It will therefore be seen that full and partly wound bobbins can be placed in the magazine stacks in any order and the movable walls adjusted to effect substantial horizontal alignment of the bobbins. These adjustments are able to move the bobbins as described due to the fact that the butt and tip guideways are normally flared upwardly, thus permitting adjustment of the movable walls toward their fixed walls.

The inner and outer magazine plates are held together by a brace 65 having feet 65 secured to the plates and joined by a horizontal section ii? the length of which determines the distance between the magazine plates. The feet are suitably secured to their respective plates as at 63 so that the outer plate derives its entire support from the inner plate i i.

The second feature of the invention relates to steadying or vibration preventing means for the magazine. As shown in Figs. 3 and 7, the magazine support H is provided with two antivibration members it made as shown in Fig. 8. Each support has a shank threaded into the support H and held in adjusted longitudinal position by a lock nut H. The end of each member 7!] adjacent to the inner magazine plate [4 is provided with a ball '12 which bears against an anti-friction plate 13 secured to the magazine plate and rolls freely in its socket 69 when the magazine rocks. These members 1B are located a considerable distance below the pivot stud I2 and when properly set to engage plate 13 prevent objectionable vibration of the magazine, particularly the outer plate. Obviously other forms of anti-friction devices than the balls 12 can be utilized, but whatever form the mem hers is take the magazine when rocked incident to a replenishing operation will be caused to move with a minimum of twisting, and the lowest bobbins B and B will be parallel to the shuttle box 2|.

The rod is connected to the magazine at a point not far removed from the s-teadying members 16 and this relationship results in proper movement of the outer magazine plate l5 when the magazine is rocked. A spring 14 acts to return the magazine to normal position subsequent to swinging by rod 30.

The third feature of the invention relates to the vertical adjustment of the magazine. As shown in Fig. 2, support H is provided with a stopping lug 15 shown in cross section in Fig. '7 This lug is adapted for engagement with one or the other of the front and back stop screws 16 and 7?, respectively, which are mounted on the inner magazine plate M. These screws are adjustable so as to determine the correct transfer positions of the lowest bobbins in the front and back stacks.

The previously described stud l2 has a shank 80 rockable in the hub i3 and has an eccentric end 81 passing through a hub 82 on the inside magazine plate M. Nut 84 clamps the hub 82 against shoulder 85 of stud l2 and lock nut 86 holds the setting. The nuts when loosened permit turning of stud l2 so that the eccentric 8! can cause rising or falling of the magazine as a whole. As shown in Fig. 9 the magazine is in its lowest position adaptable to small weft diameters, but the magazine would be raised to provide added clearance if large diameter wefts are wound on the bobbins. If there should be any back and forth movement of the magazine due to turning of the eccentric the adjusting screws 76 and 11 can be altered to locate the lowest bobbins in the magazine correctly for transfer.

From the foregoing it will be seen that I have provided a magazine wherein bobbins of various amounts of weft wound thereon can be aligned so they will remain in the magazine and feed downwardly in their stacks toward transfer position. Any one of several assortments of bobbins can be placed in the guideways at random and when so placed the movable guideway walls can be adjusted as described to establish 1e widths of the guideways best suited to the bobbins. While the movable guideway walls have been described in connection with a particular kind of holding device, such as the members @3, I do not wish necessarily thus to be limited, since any suitable holding means by which the adjusted widths of the guideways may be retained will serve the purpose of the present invention. It will also be noted that the steadying members it are adjustable toward and from the magazine and are at a considerable distance below the pivot stud l2 and not far from the point at which a turning force is applied to the magazine by rod 39. Wear plate 73 is not essential but is desirable. Also, the eccentric stud l2 permits a vertical adjustment of the magazine with respect to the shuttle box, and the adjustable stop screws 76 and Ti afford compensation for any back and forth misplacement of the lowest bobbins in the magazine resulting from adjustment of the eccentric. The details of the bobbin guides set forth hereinbefore are not claimed herein but form the subject matter of the parent application of which this is a divisionv Also, the hereinbefore described vertical adjusting means for the bobbin magazine is not claimed herein but is claimed in copending application Serial No. 30,092 filed on even date herewith.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a weft replenishing loom having a support, a pivot on said support, a rocking magazine on said pivot, means to move said magazine about said pivot, and anti-vibration roll members engaging the magazine to prevent vibration of the latter when the same is moved by said means.

2. In a weft replenishing loom having a support, a pivot on said support, a magazine on said pivot, means to move said magazine angularly about said pivot, a member mounted on said support for adjustment toward and from the magazine, and roll means on said member engaging the magazine to prevent vibration thereof when said means moves the magazine angularly about said support.

3. In a weft replenishing loom having a support, a pivot on said support, a magazine on said pivot including an end plate, means to move said magazine about said pivot, a wear member secured to and normally rigid with respect to said end plate, and anti-vibration means engaging said wear member to prevent vibration of said magazine when the latter is moved by said means.

RICHARD G. TURNER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

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