US1790617A - of hoped ale - Google Patents

Description

Jan. 27, 1931. c BRQWN 1,790,617

TAKE-UP MECHANISM FOR Looms Filed Jan. 28, 1928 Cqrl D. Brown Aitys.

Patented Jan. 27,1931

CARL n ROWN,

F HOPEDALE, MASSACHUSETTS, ASSIGNOR-TO DRAPEB CORPORA- TION, 0F HOPEDALE, IEASSACHUSETTS, A CORPORATION OF MAINE TAKE-iii? MECHANISM non Looms Application filed January 2a, 1928. se ial No. 250,187.

This invention relates to the take-up mechanism of a loom. It is very important that the take-up mechanism shall act uniformly and surely during the weaving of the cloth.

5 Any uneven movement of the cloth as it is taken up, especially in occasional backward slippage of the cloth, results in an imperfect product. Such slippage may be due to a wide variety of causes. If, for example, the

19 cloth presents a softer yielding surface such as a terry or pile fabric, or if, for example, the cloth presents a smooth surfacewhich is not readily gripped by the take-up roll surface, there may be backward slippage of the cloth. r

The present invention provides two' positively driven take-up rolls located beneath a transverse bar which may be fixed or rotatable and may be adjacent to, or a part of, the

20 breast beam of a loom, around which the cloth passes from the fell. l/Vith the cloth passing from the transverse bar around and between the two positively driven rolls and thence to the usual cloih roll upon which it is wound, each of the two surfaces of the cloth engages a positively'driven take-up roll and each surface engages a wide segment of the corresponding take-up roll. Thus the take-up mechanism has a very firm hold on the cloth, whatever may be its character or surface, and even when the take-up rolls present relatively smooth peripheral surfaces, the cloth is still gripped and taken up in such a way as to prevent backward slippage and insure uniform and even weavlhe object of the invention is therefore to provide a take-up mechanism involving two positively driven take-up rolls mounted be neath the transverse bar and so related that the desired results are secured.

The present invention also involves as a subsidiary feature a slight differential in the peripheral soeed of the take-up rolls, so

that the main ta re-up roll or the latter of the two rolls around which the cloth passes and is taken up moves at 'a slightly greater peripheral speed than the other or auxiliary take-up roll. Under some circumstances this is desirable as further insuring against any backward slippage of the cloth around the auxiliary take-up roll or the first take-up roll to which the cloth passes from the transverse bar. Y

The nature and objectsof the invention will appear more fully from the accompanying description and drawings and will be particularly pointed out in the claims.

As the invention is concerned solely with the take-up mechanism andis applicable to a wide variety of looms and as the general construction and operation of such looms and the relation of the take-up mechanism thereto is well known and familiar to those skilled in the art, it is only necessary to illustrate and describe a portion of one form'of loom in connection with a preferred embodiment of the invention.

' In the drawings:

Fig. 1 is a somewhat diagrammatic view in vertical cross section and side elevation showing the forward upper portion of a loom with a preferred form of the invention embodied therein.

Fig; 2 is a front elevation of a portion of the loom showing the same construction.

Fig. 3 is a detail to illustrate a variation in the periphery of the take-up roll.

Fig. 4: is a diagrammatic view showing a,

slightly different arrangement of the path of the cloth.

Fig. 5 is another diagrammatic View showing a third arrangement of the path of the cloth.

The take-up mechanism of a 100m is a veryimportant mechanism because the degree. of

perfection with which the cloth is woven depends upon operation.

regularly, the cloth itself will be woven irregularly and will not be perfect. A great deal of difliculty isexperienced, especially in connection with some types of cloth, in securin the re uired action of the take-u mechanism upon the cloth. If, as has alreadybeen noted, the cloth being woven presents a' terry or pile surface,

its uniformity and accuracy of If the cloth be taken up iror if it presents an unusually smooth surface, or if for any reason the cloth is with difficulty gripped and held by the peripheral surface of the take-up roll, there is likely to be backward'slippage occurring undesirable results.

at irregular intervals and producing highly The present invention by a very simple and yet eifective means is found in practice to in sure uniformity and accuracy in taking up cloth of various types. 'The invention depends chiefly upon the use of two positively driven take-up rolls located beneath a trans verse bar around which bar tne cloth is led from the fell. By passing the cloth from this bar around and between these two positively driven take-up rolls, it is found that t is cloth is firmly grippedgand held by the takeup rolls. The location is sucii that cloth neces sarily passes around large segments, that is more than half the per phery, of each take-up roll andfurthermore, the two sides of the cloth are each presented to a positively driven peripheral surface of a takeaip roll. The taking up action under some conditions may further be assisted by 621115111 the periphery of the latter of the two take-up rolls to move the usual breast beam. The cloth 3 illustrated in Fig. 1 is inoicated much exaggerated in thickness and of the terry type of weave presenting pile loops at both surfaces.

Beneath the transverse bar 2 is located the main take-up roll l journalled on the shaft 5. This shaft 5 carries the pinion 6 driven by a gear 7' positively rotated from the driving shaft of the loom or in any other suitable manner. v

Above the main take-up roll and behind and beneath the bar 2 is located the auxiliary take-up roll 8. This roll is also positively driven. 'In the form illustrated, the positive drive for the auxiliary take-up roll is secured by a pinion 9 on the shaft 10 of this roll meshing with a gear 11 on the shaft 50f the main take-up roll. Usually the two take-up rolls are so geared together'that their peripheral surf ces travel at the same speed.

A suitable cloth roll 12 upon which the cloth is wound is mounted in'the usual manner upon a shaft 13 carried by vertical slides 14 so that as the diameter of the cloth wound on the cloth roll increases, the cloth roll moves downwardly, the rotation of the cloth roll being effected by peripheral ontact with the main take-up roll. As is usual in this construction, the shaft 13 of the cloth roll isprovided with a pinion 15 which at the beginning of the operation meshes with the gear 11- on the main take-up roll and insures he rotation of the cloth roll at the start. As the cloth is wound on the cloth roll, this pinion 15 moves out ofmesh with the gear 11.

that there be a slight differential in the peripheral speed of the two take-up rolls. If the periphery of the main tale=up roll moves very slightly faster than the periphery of the auxiliarytake-up roll, especially when a pile fabric is being taken up, it serves further to prevent anybackward slippage of the cloth on the auxiliary take-up roll. This differential in speed must be very slight and it may be secured by any desired means, but usually it will be suffi'cient, without altering the gears,

to increase the diameter of the roll a, as shown in Fig. 3, by winding additional layers 'sof paper or other surfacing material 17 thereon.

In the operation of the take-up mechanism as illustrated in Fig. 1, the cloth3 passes from the fell around the transverse bar 2,

thence back and around the auxiliary take- .np'roll 8, thence forwardly and around the main take-up rolll, thence upwardly and around the guide bar 16 and thenceto the cloth roll 12 at a point well in advance of the bite between the cloth roll and the take-up roll by which it is driven.-

lt will be seen that with this arrangement, the cloth encircles a very large portion of the peripheries of the two take-up rolls, that one surface of thecloth engages the periphery of the auxiliary take up roll 8 and the opposite surface engages the periphery of the take-up roll 4-, and that the peripheries of the two take-up rolls are Slightly separated to prevent any calendering or rubbing of the cloth.

V Thus'the cloth is very firmly engaged by both take-up rolls and uniformlyandaccurately fed without injury to either surface.

The surfaces of'the takeup rolls maybe finished in any suitable manner depending upon the cloth being woven and are shown in Fig. 2 as covered with fine sandpaper, such as usually employed.

In Fig. l is illustrated a slightly difl'erent arrangement. Here the cloth 18 after passing around the transverse bar 2 passes rearward and aroundthe auxiliary take-up roll 8, thence forwardly and around the main take-up roll 4:, and thence directly to the cloth roll 12. In Fig. 5 the cloth 19,.after passing around the transverse bar 2, passes downwardly and around the inain take-up roll l, thence up and around the auxiliary have .a slightly greater peripheralspeed than I the main take-up roll 4 because the cloth passes from the transverse bar firstto the main take-up roll.

There is thus afiorded by the arrangement of the cloth with respect to the take-up rolls and guide bar means for varying more or less the extent to which the cloth is engaged by he peripheral surfaces of the two take-up rolls. But in all cases it will be observed that the cloth passes first around the transverse bar and from thence around and between in succession two positively driven take-up rolls located beneath the transverse bar.

When, as shown in Fig. 1, a terry or pile fabric is being woven, it is frequently desirable to give an initial set in the direction of the pile loops so that as they lie on the surface of the take-up rolls they will lie in the same direction. To secure this result, the transverse bar 2 in Fig. 1 is shown as presenting at the top a ridge bar 20, which bar presents a rear pile deflecting edge or corner 21. This edge, acting against the pile loops of the under surface of the cloth, gives them a definite set.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is:

1. A take-up mechanism for looms comprising a transverse bar, a positively driven "lain take-up roll beneath the bar, a positively driven auxiliary take-uproll beneath and behind the bar, the said take-up rolls being j ournalled in bearings maintaining the roll peripheries separated, and a cloth roll beneath the main take-up roll driven by a peripheral contact therewith, the said elements being so related that when the cloth is led from the fell around the bar, around and between the main and auxiliary take-up rolls and thence around the cloth roll, the two faces will be engaged by segments greater than half the peripheries of the take-up rolls and the cloth will be wound on the cloth roll and fed thereto well in advance of the line of peripheral contact with the take-up roll.

2. A take-up mechanism for looms comprising a transverse bar, a positively driven main take-up roll beneath the bar, an auxiliary take-up roll beneath and behind the bar and above and geared to the main take-up roll, said take-up rolls having bearings fixed in position to vspace the rolls slightly apart, and a cloth roll beneath the main take-up roll driven by a peripheral contact therewith, the said elements being so related that when the cloth is led from the fell around the bar, around and between the main and auxiliary take-up rolls and thence around the cloth roll, the two faces will be engaged by segments greater than half the peripheries of the take-up rolls and the cloth willbe wound on the cloth roll and fed thereto well in advance of the line of peripheral contact with the take-up roll.

3. A. take-up mechanism forlooms comprising the construction defined in claim 1, together with a guide bar at the rear of the main take-up roll and beneath the auxiliary take-up roll over which the cloth is led be fore its passage to the cloth roll to cause the cloth to engage nearly the entire periphery of the main take-up roll.

l. A take-up mechanism for looms comprising a fixed transverse bar around which the cloth is led from the fell,'two positively driven take-up rolls beneath and below said transverse bar geared together and having their peripheral surfaces spaced slightly, the cloth passing from said bar rearwardly around and between said rolls, a guide roll positioned to wrap the cloth around one of the take-up rolls for the major portion of its surface and a cloth roll beneath the take-up rolls driven by peripheral contact with one thereof and to which the cloth passes from said guide roll.

5. A take-up mechanism for looms comprising a transverse fixed bar, a positively driven main take-up roll beneath the bar, an auxiliary take-up roll spaced slightly therefrom above and geared to said main take-up roll and behind and adjacent to said transverse bar, whereby when the cloth is led from the fell around said transverse bar over said auxiliary take-up roll and between the two take-up rolls both faces of the cloth will. be engaged by the major portion of both the bar and the auxiliary take-up roll, a guide roll positioned relatively to said main take-up roll to cause a maximum wrap thereabout, and a cloth roll beneath said take-up rolls driven by peripheral contact with said main take-up roll and to which the cloth passes from said guide roll.

6. A take-up mechanism for looms comprising a transverse bar around which the cloth is led from the fell, two positively driven take-up rolls beneath the bar around and between which the cloth passes successively from the bar, a cloth roll to which the cloth passes from the take-up rolls and upon which it is wound, and a guide bar around no I which the cloth passes after it leaves the V take-ups rolls and situated with respect to the cloth roll to direct the cloth into engage-.

ment with said cloth roll at a point well in advance of the bite between the cloth roll and the take-up roll.

In testimony whereof, I have signed m name to this specification.

CARL D. BROWN.

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