US2477082A - Device for combing warp threads in circular weaving looms - Google Patents

Description

July 26,1949. H. PELCE 2,477,082

DEVICE FOR COMBING WARP THREADS IN CIRCULAR WEAVING LOOMS Filed Jan. 21, 1948 Patented July 26, 1949 UNITED STAT DEVICE 'FOR COMBING WARP THREADS in f CIRCULAR WEAYING'rIJOOMS i Hem-i Pelc, Paris, France, assignorto socit dite: Saint Freres (Socit Anonyme), Paris,

France Application January 21, 1948, Serial No; 3,568

I In France J anuary'25, 1947 v Claims. 1

The present invention relates 'to a device for combing warp threads in a circular weaving loom.

The Patent 2,398,956 discloses such a device which comprises a set of wheels peripherally provided with spikes or teeth, mounted outside the shed at the rear of each shuttle and rolling on the layers formed when the shed is closed by the warp threads, with their spikes or teeth engaged between said threads.

The copending application Ser. No, 628,829 has for its object a device for tightening the weft threads of a circular weaving loom including to the rear of the loom shuttle a movable wheel carrying spikes mounted in a manner such that the path followed by the spikes may be oblique with the reference to the axis of the loom while the spikes are arranged obliquely with reference to said path.

The main object of the present invention is to provide behind each shuttle the loom is provided with, a belt stretched over two wheels and carrying spikes, said wheels having a movement of rotation round the well of the loom with an angular speed equal to that of the shuttle and the spikes carried by the side of said belt adjacent the warp threads engaging said threads, the wheels being so arranged that this side of the belt is approximately tangent to the well.

With this improved mechanism the spikes are 1 in engagement with a great many threads and the belt, in the case the wheels round which it is stretched are loosely rotating, is less liable to drag than are the several spike-carrying wheels disclosed in the Patent 2,398,956 and the spikes of which engage but a quite less number of warp threads. After all, by positively driving any one of the stub shafts that carry the belt-supporting wheels a mechanism is obtained whose action is fully reliable and which is equivalent to the reed of a straight loom.

An embodiment of this novel mechanism, which is given by way of example, is described hereinafter, reference being had to the appended drawing in whose single figure the mechanism is illustrated in perspective view.

The shuttle l is moved on a circular path about the axis of the well I5 and lays a weft thread 2| between the warp threads I 2 and I3. Provided at the outside of the shed behind the point of which the weft thread 2| is inserted between the warp threads l2 and I3, and partaking of the motion of the shuttle, are a pair of small wheels 22 and '23 round which a belt 24 is run which carries spikes 20. The stub shafts of the wheels 22 2 1 and 23, are mounted in brackets '25. carried on a ring 26 that is rotated about the axis-of the well l5 at the same angular speed as the shuttle and said stub shafts may besetat an angle to the horizontal plane as shown in the single figure.

- The spikes are inclined with respect :to the belt backwise to the direction of rotation of the wheels 22 and 23 as indicated by the arrows. That side of the belt whose spikes 20 are in engagement with the warp threads (i. e. the upper side as shown) is substantially tangent to the well at a point located behind the shuttle in such a direction that the spikes on the belt will comb the warp threads from the outside towards the well. Such an inclination is also effective to compact the weft thread 2| pressed sidewise by the spikes 20 into the bottom of the shed.

Since the system composer of the wheel pair 22, 23 and the belt 24 that carries the spikes 20 is moved in parallel circular motion about the axis of the well and the vertical axial plane through the warp threads engaged by the spikes are fixed, it follows that the wheels 22 and 24 will rotate in the directions indicated by the arrows in the figure. Any one of the stub shafts that carry the said wheels may also be driven positively so that a mechanism is obtained that is absolutely reliable in action.

What I claim is:

1. A device for combing warp threads in a circular weaving loom comprising an endless belt, a set of two wheels about which said belt is stretched, spikes carried by said belt, this whole system being arranged outside the shed behind the shuttle, partaking of the movement of the shuttle and being so arranged that the spikes on one of the sides of the belt engage the warp threads, said side being substantially tangent to the well at a point located behind the shuttle.

2. A device as claimed in' claim 1 wherein one of the wheels round which said belt is stretched is driven positively into rotation.

3. In a device for combing warp threads and for tightening the weft thread in the bottom of the shed of a circular weaving loom, a shuttle, two wheels having a movement of rotation round the conventional well of the loom with an angular speed equal to that of the shuttle and mounted outside the shed behind the shuttle, an endless belt adapted to run over said wheels, spikes carried by the outer surface of said belt, the spikes carried by the side of said belt adjacent the warp threads engaging said threads, said wheels being so arranged that said side of the belt is approximately tangent to the well.

4. in a circular weaving loom provided with a conventional well and with at least one shuttle, a device for combing warp threads and for tightening the weft thread in the bottom of the shed, comprising a pair of loosely rotating wheels mounted outside the shed behind each shuttle and having a movement of rotation round the well with an angular speed equal to that of this shuttle, an endless belt adapted to run over each pair of said wheels, spikes carried by the outer surface of each belt, the spikes carried by the side of said belt adjacent the warp threads engaging said threads, said spikes being inclined in the direction reverse to the direction of rotation of said wheels which rotation results from said engagement of the spikes with the warp threads and from said movement of rotation of said wheels round the well, said wheels being so arranged that said side of the,. belt adjacent the warp threads is approximately tangent to the well.

5. In a circular weaving loom provided with a well and with at least one shuttle a device for combing warp threads and for tightening the weft thread in the bottom of the shed behind each shuttle, comprising two wheels mounted outside the shed behind each shuttle and having a, movement of rotation round the well with an angular speed equal to that of this shuttle and one of which is positively driven, an endless belt adapted to run over said wheels, spikes carried by the outer surface of said belt, said spikes being inclined in the direction reverse to the direction of the peripheral speed of said wheels, the spikes carried by the side of said belt adjacent the warp threads engaging said threads and said wheels being so arranged that said side of the belt is approximately tangent to the well.

HENRI PELCE.

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

UNITED STATES PATENTS

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