US1519804A - Thread-conducting device for gripper looms - Google Patents

Description

Dec, 16, 1924.

G. SIEBER THREAD CONDUCTING DEVICE FOR GRIPPER LOOMS Filed Nov. 26. 1923 ooooo ooo Inventor:

K ttorlyg Patented Dec. 16, 1924.

UNITED STATES GOTTWALT SIEBER, 0F PLAUEN', GERMANY.

THREAD-CONDUCTING DEVICE FOR GRIPPER LOOMS.

Application filed November 26, 1923. Serial No. 677,024.

To all whom it may concern:

Be it known that I, Go'r'rwALT SIEBER, a citizen of the German Republic, and a resident of Plauen, Saxony, Germany, have invented a new and useful Improved Thread- Conducting Device for Gripper Looms, of which the following is a specification.

This invention relates to a device for conducting the weft threads from the bobbin board to the thread board of a gripper loom for the manufacture of a chenille preliminary fabric, especially such as required for the manufacture of Axminster carpets. There is required for this kind of work a loom in which a large number of threads of difierent colors is introduced between the warp threads in a certain succession as ren dered necessary by the pattern to be produced. Introducing said weft threads between the warp threads can be effected best by means of a gripper shuttle to which the free ends of the various weft threads are held forth. for being grasped selectively, which is done with the aid of the above-mentioned thread board. The weft threads must be conducted from the bobbin board to the thread board in such a manner that they cannot get entangled with each other, but can be drawn in again if any thereof should tear. The arrangement must be such that each weft thread can be pulled off its respectiVe bobbin and through between the warp threads without any impediment by warp threads, knots or the like.

The device forming the subject-matter of this invention answers all these require ments, and the gist thereof consists in the feature that the connection between the bobbin board and the thread board is efi'ected by means of grooveor channel-forming members apt to conduct the threads secure- 1y from one board to the other board. These conducting members are movably at tached to the bobbin board in such a man ner that they can follow all movements thereof, and this board itself is provided with suitably large apertures or passages which, although being so large, do not impair the secure gripping of the weft threads by the shuttle grippers, as is all more fully described hereinafter.

My invention is illustrated, by way of example, in the accompanying drawing, in which Figure 1 is a perspective representation of the bobbin frame and its connection with the thread board; Figure 2 is a vertical section through the thread board drawn to an enlarged scale; Figure 3 is a front view of the same; Figure 4 is a verti cal transverse section through one of the thread conducting members; Figure 5 is a horizontal section in the plane AA of Fig ure 2; Fig. 6 illustrates how the weft thread is grasped by a gripper; and Figure 7 is a perspective View of a single individual thread-member, drawn to an enlarged scale.

The bobbin frame consists, in the example shown in Figure 1, of the horizontally disposed bobbin board 1 to which is attached a plurality of upright mandrils 2, each of which receives a bobbin. Above these parts is a plurality of horizontal bars 3 having bores through which the threads coming from the bobbins, i. e. the weft threads, are passed; and above the bars 3 is an oblique lath grate t, on the laths of which are arranged rows of thread guides 5 which are U-shaped in section as shown in Figure 4. The object of these guide members 5 is to conduct the weft threads securely on their way from the bobbin frame (.0 the thread board 6.

The lower part of the thread board consists of parallel vertical members 6 and 7 (Figs. 2' and 3), of which the members 6 are located in front of the members 7. These latter are provided with apertures corresponding in shape to the shape of the thread guide members 5, each of which extends with its front end 5 into one of said apertures, the ends of the legs of the U be ing then bent round in the manner shown in Figures 5 whereby the two parts are connected with each other in such a manner that the guide members 5 are capable of a f certain vertical movement in said members 7. The rear ends of the guide-members or channels 5 rest loosely on the laths 4. and are kept on their proper places either by notches provided in said laths or by pairs of pins, as indicated in Figure 1. This loose connection of the guide members with the laths is necessary in order to enable the f0."- mer to give way in the case of a shifting of the thread board in horizontal or vertical direction.

The thread guide channels 5 converge strongly towards the thread board 6, the distance between the threads at the latter amounting to less than 2 0111., whereas their distance on the laths 4 is such that the rear end of each guide member lies approximate lHI thread ends.

usual tubular thread end holders, the abovely vertically above its appertaining bobbin, or the mandrel thereof respectively, so that the respective thread is drawn off that bobbin approximately vertically upwards and cannot possibly get entangled with any of the neighbouring threads. The bars 8 wh1ch are arranged between the bobbins and the thread guides 5 prevent entangling also 1f any thread should be swung laterally owlng to a comparatively quick pull thereof.

It is obvious that the thread guide members 5, i. e. the channel-shaped guides, may be replaced by equivalent guide members, for instance pieces of tube, a grating or gratings, or the like, and it is also possible to combine a certain number of the threads to a set without departing from the invention.

In order to be able to insert again and in a convenient manner a thread which had been torn, the thread board is divided into individual members 6 and 7, of which the former are wedge-shaped in horizontal section and have each vertical flanges at the face opposite the appertaining member 7 which is connected with the respective member 6 by two connecting pieces 6; one thereof being located at the top, the other at the foot of the respective two members 6 and 7.

Each member 6 is provided with a plurality of bores 9 lying opposite the aper tures 7 of the member 7; these bores terminate at one of the oblique surfaces of the individual wedges, and a flat spring 10 is attached near bore in such a manner that the thread is tension-held so as to hold forth its end to the gripper in proper operative position. Although I prefer the wedgeshaped form of the members 6, this form is not indispensably requisite, as instead thereof flat members with grooves in one side may be employed, may be in connection with springs or equivalent means for retaining the In contradistinction to the described improved holder offers the advantage that the gripping member 11 6) of the weft gripper can engage the holder (6) behind the end of the bore (9), or its equivalent, and engages the thread in when being withdrawn, whereby it is prevented from-gliding oif upwards or downwards so that also faults in the fabric resulting from such undue movement are obviated.

The upper part of the thread board 6 is formed by a kind of grating 8 consisting of parallel vertical bars forming guides for the members 6 and 7 which can be shoved along them as shown, by way of example, in the righthand upper part of Figure 8. This arrangement renders it possible to lift any of the vertical rows of the thread guide channels 5 out of the whole set so as to afford access to any channel and its thread and rendering it possible to draw in another thread in lieu of a torn one, without any interruption in the weaving work.

I claim:

1. A device for conducting the weft threads from the bobbin board to the thread board of a gripper loom, comprising in combination, a bobbin board, a thread board, and thread conducting members extending from the bobbin board to the thread board, commencing approximately vertically above the appertaining bobbins and being movably connected with both boards, as set forth.

2. A device for conducting the weft threads from the bobbin board to the thread board of a gripper loom, comprising, in combination, a bobbin board, mandrels thereon, and bobbins on the mandrels; a thread board consisting of parallel vertical members adapted to be singly lifted, and thread conducting members arranged to form horizontal rows and vertical rows and extending from the bobbin board to the thread board and being movably connected with both boards, the ends of the conducting members forming vertical thread board members and being adapted to be lifted together therewith, as set forth.

3. A device for conducting the weft threads from the bobbin board to the thread board of a gripper loom, comprising, in combination, a bobbin board, mandrels thereon, and bobbins on the mandrels; a thread board consisting of parallel vertical members, and thread conducting members arranged to form converging horizontal rows and converging vertical rows and extending from the bobbin board to the threadboard and being movably connected with both boards, the rear ends of said conducting members lying approximately above the appertaining mandrels, as set forth.

4. A device for conducting the weft threads from the bobbin board to the thread board of a gripper loom, comprising, in combination, a bobbin board, mandrels thereon, and bobbins on the mandrels; a thread board consisting of parallel vertical members, guides for the same, and thread 0011- ductlng members arranged to form horizontal rows and vertical rows and extending from the bobbin board to the thread board and being movably connected with both boards, as set forth.

5. A device for conducting the weft threads from the bob-bin board to the thread board of a gripper loom, comprising, in combination, a bobbin board, mandrels thereon, and bobbins on the mandrels; a thread board consisting of parallel vertical members which are of wedge-shaped section on the side opposite the thread board, and thread conducting members arranged to form horizontal rows and vertical rows and extending from the bobbin board to the thread board being movably connected With both boards, as set forth.

6. A device for conducting the Weft threads from the bobbin board to the thread board of a gripper loom, comprising in combination, a bobbin board, mandrels thereon, and bobbins on the mandrels; a thread board consisting of parallel vertical members, guides for the same and thread conducting members arranged to form converging horizontal rows and converging vertical rows and extending from the bobbin board to the thread board and being movably connected with both boards, the rear ends of said conducting members lying approximately above the appertaining mandrels, as set forth.

In testimony thereof I affiX my signature in presence of two witnesses.

GOTTVVALT SIEBER. Vitnesses:

M. ORooKEn, J 01-1. THAUBER.

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