US3304957A

US3304957A - Weaving heddle

Info

Publication number: US3304957A
Application number: US413171A
Authority: US
Inventors: Koch Bernhard Robert
Original assignee: Grob and Co AG
Current assignee: Grob and Co AG
Priority date: 1963-12-19
Filing date: 1964-11-23
Publication date: 1967-02-21
Anticipated expiration: 1984-02-21
Also published as: CH410814A; GB1027328A; BE652854A; AT247257B; NL6414770A

Description

Feb. 21, 1967 B. R, KOCH 3,304,957

WEAVING HEDDLE B. R. KOCH 3,304,957

v WEAVING HEDDLE Feb. 21, 1967 Filed Nov. 23, 1964 2 Sheets-Sheet 2 INVENTOR BERNHARD ROBERT KOCH United States Patent O 3,304,951 WEAVING HEDDLE Bernhard Robert Koch, Zurich, Switzerland, assignor to Grob & Co. A.G., Horgen, Switzerland Filed Nov. 23, 1964, Ser. No. 413,171 Claims priority, application Switzerland, Dec. 19, 1963, 15,693/ 63 11 Claims. (Cl. 139-93) The invention relates to Weaving heddles.

There are various known forms of weaving heddles which have end loops joined to the body of the heddle. These known weaving heddles differ one from another owing to the nature of the heddle body, the type of l@he end loops and the way in which such loops are connected to the heddle body.

That part which extends between the two end loops and which includes one or more eyes to receive warp threads, and if required, further openings is called the body of the weaving heddle. The heddle body can be made from flat steel wire, strip steel or of tinned twin wire, as used for twin wire heddles. The end loops which are to lbe mounted on the body of the heddle are of a shape determined by the shape and dimensions of the heddle carrying rods. They can either embrace the heddle carrying rods completely, be open at one `side (C- or lshaped) or be hookor claw-shaped.

Heddles are known with attached one-piece end loops, so-called end loop plates, as well as such with two end loop plates which are individually attached to the end of the Iheddle body, vand such with double end loop part formed by folding.

One-part end loop plates are joined to the heddle body in the known manner by inserting its end into ya suited slot-like opening at one end of the plate and soldering or welding it onto same. If the heddle body consists of tinned twin wire, its end may be split and the individual wires bent apart and pressed into suitable openings. In this kind of heddle it is desirable that the weaving heddles, once the end loop plates have been attached, can be transported to the soldering device without changing their position in relation to the heddle body.

To attach a flat steel heddle body to a one-piece end loop plate the end of the body may in the known manner be punched head-shaped and fitted into a suitable cut-out and soldered. A more simple method is. to weld the broad side of a one-piece ilat end loop plate to the broad side of the heddle body. This joint however has distinct protruding edges and warp threads may get caught.

It has been suggested that two closely adjacent end loop plates or two individual end loop plates be attached to the heddle body. This requires a welding operation and at the junction the thickening is more distinct, thereby unfavourably inuencing the maximum set of heddles.

It has also been proposed to attach one-piece end loop plates to flat steel heddles by different ways of interlacing the end of the heddle body with the end loop plate.

Such connections can be carried out without welding or soldering, however, the one piece end loop where it is folded is about two or three times its thickness and considerably reduces the number of heddles that can be lined up and warp threads can get caught at the various protrudings. To introduce or hook the end of the heddle Patented Feb. 21, 1967 ICC body into the end loop plate and the subsequent bending operation are an obstacle to quick Iand economic manufacture.

It is the purpose of the invention to create a weaving heddle with at least one separately manufactured onepiece end loop, which is connected to the heddle body without welding, soldering -or bending, by introducing the end of the heddle body into the end loop, which when pressing the latter enters into openings provided therein.

Thus, according to the present invention, a weaving heddle including at least one end loop and a heddle body secured thereto, said end loop having superimposed parts between which the heddle body extends is characterised in that the end of the heddle body is held in position in the loop by at least one deviation which is achieved by entering the body into a correspondingly adjusted cutout in the material of the end loop.

A suited procedure to manufacture this new heddle is that the end of the heddle body is slid into the sleeve shaped end loop and is then distorted by pressing same together.

The invention will now be described further, by way of example only, with reference to the accompanying drawings in which:

FIG. 1 shows a lateral view of a twin wire heddle with attached end loops;

FIG. 2 shows the upper end loop of FIG. l to a larger scale;

FIG. 3 is a cross-section on the line III-III of FIG. 2 to a larger scale;

FIG. 4 is a longitudinal section on the line lV-IV of FIG. 2 to a larger scale;

FIG. 5 shows an alternate form of upper end loop;

FIG. 6 is a cross-section on the line VI-VI of FIG. 5 to a larger scale; and

FIG. 7 shows a longitudinal section on the line VII- VII of FIG. 5 to a larger scale;

FIG. 8 is a plan view of a yblank employed in forming the end loop; .and

FIG. 9 is a perspective view of the prefolded blank 4before being folded side to side and after the heddle end has been inserted.

The weaving heddle as illustrated in FIG. 1 consists of the heddle body `1 with a uniform, laterally open, C- shaped end loop 2 secured to each end thereof. In the embodiment illustrated, the body 1 of the weaving heddle corresponds with that of a twin wire heddle with twin wires arranged juxtapositioned in the running direction of the warp. The eye to accommodate the warp thread has been omitted for simplicitys sake. The heddle illustrated shows the end loops 2 at the upper and lower ends of the body, but it is to be appreciated that it would be possible to provide an end loop at one end only.

FIG. 2 shows an upper end loop 2 made of strip steel folded side to side so that the abutment joint 3 does not coincide with one of the two edges. At 4a and 4b longitudinal recesses have been provided at the joint side, into which recesses the twin wire of the heddle body enters.

The cross-section of the end loop 2, as illustrated in FIG. 3, shows how the twin wire of the heddle body 1 enters into the recess 4a. This illustration clearly showsthat thanks to the recess 4a the twin wire of the Weaving heddle causes no thickening whatsoever of the end loop 2. Such end loops lie at on each other `and can be perfectly piled contrary to known -one-piece end loops, since the thickening that would have been caused by soldering7 can be avoided.

The longitudinal section as shown in F'IG. 4 demonstrates how the end of the heddle body 1, after the introducing thereinto and the pressing together of the prefolded end loop 2 successively enters into the openings b, 4b, 5a and 4a provided alternately in the back and `front or inner or outer walls of the end loop, the openings being arranged in partly 4overlapping relationship in said inner and `outer walls. Without soldering or welding a connection is cre-ated which is not 4subject to play, and is resistant to pull simply by bending and respectively offsetting successive portions of the end of the heddle body. Also, in the longitudinal direction of the end loop, no thickening is caused by introducing the heddle body end.

A `further important advantage -of this weaving heddle is that it is sufficient to place the cut-off end of the heddle body into the pre-folded end loop as shown in FIGURE 9 and then completing the fold from side to side as shown in FIGURE 3. Any splitting of the twin wire and bendin-g or spreading of the individual wires is not necessary. Likewise, one has only to cut off the heddle body o-f flat steel heddles when assembling same. Any fitting form and respective cut-out in the end loop can be saved.

Since the ends of the twin wire forming7 the heddle body of the twin wire heddle no longer have to be spread this connection can be kept considerably narrower than with the known arrangements. As shown in FIG. 2, the upper part of the connection of a heddle for a riderless weaving frame with C-shaped end loops can by virtue of its small width, also extend to a position adjacent to the cut out for taking up the heddle carrying rod. Thus, it is possible to keep the end loop shorter, by which a saving of raw material, lessening of weight :and correspondingly easier movement of the weaving heddle is achieved.

It is no longer necessary to slit the end loop over the full extent of that part of the heddle body which enters the loop and thus the weakening of the body is less.

By virtue of its small width the junction can also be placed near the narrow ed-ge of the end loops formed by a welt. The advantages of this arrangement are described with reference to FIGS. 5 to 7, such iigures showing the upper part of a weaving heddle with closed end loop. The end loop 6, into which the end of the heddle body 7 is pressed, also consists of one part and has an abutment joint 8. For example, two in this case round, cut-

outs

9a and 9b have been provided, with which the twin wire of the heddle body 7 is engaged. The long cut-out 11 serves to accommodate the heddle carrying rod. `In order to reduce weight, oblong slots |12 have been provided. The slots are loc-ated either on the fr-ontor joint-side, as can be seen from FIG. 6, or if they are on the frontand rear-side they are staggered relative to each other. Thus it is possi-ble to avoid accumulation of fluff and fly, since the slots are not going lright through and their depth is limited.

Lf the cut-outs in the end loop are staggered and do not even partly coincide, as shown in FIGS. 6 and 7 and if the end loop is made of material well suited 4for cold working, the twin wire 7 and the end loop material, in areas where no cut-outs are provided, are squeezed when the end loop is closed and pressed flat. At the spot where the heddle body 7 enters into the end loop 6 it is feasible somewhat to chamfer the end loop at 13 to cre-ate la conical inlet.

The heddle body 7 lies at one side of the vertical axis running through the cut-out 11 for the upper and lower heddle carrying rod. By reversing alternate heddles having closed end loops on the heddle carrying rods a double rowed heddle set-up can be achieved without the heddle having to be bent twice in the known manner near the .upper and lower end loops.

It is in the intention 'of the invention that the end loop can be created differently and the positioning, shape and number of the cut-outs be varied. If the material from which the end loops are .made can be cold-worked, the cutouts can be arranged unstaggered. The body of. the weaving heddle will enter int-o the cut-outs on either side or be squeezed between the end loop material.

It is also possible to choose the cut-outs so that only one of the twin wires enters whilst the other enters for example into the opposite cut-out staggered by the thickness of the individual wire.

What I claim is:

1. A weaving heddle including at least one end loop and a heddle body secured thereto, said end' loop having superimposed parts forming inner and outer walls between which the heddle body extends, one end of said heddle body being held in position by said parts against `frictional displacement, `said inner yand outer walls being provided with at least -one cut-out and said heddle -body lbeing provided with a laterally extending offset portion extending into said cut-out to securely hold said heddle body end between said superimposed parts.

2. Weaving heddle as claimed in claim 1 characterised in that the end loop consists of a folded piece of plate with its ends forming a joint, said joint being positioned in one wall of the end loop.

3. Weaving heddle as claimed in claim 2 characterised in that the cut-outs are openings in the plate which forms the end loop.

4. Weaving heddle as claimed in claim 3 characterised in that the openings in the inner and outer walls of the end loop are staggered with relation to each other in the longitudinal direction of the end loop.

5. A weaving heddle comprising lspaced end loops and a heddle body extending between said loops and the ends of said heddle body secured to the said end loops, each end loop having two superimposed parts between which the respective end of. the heddle 4body is located and which, furthermore, present openings into which the heddle body extends thus to preclude longitudinal motion of the body relative to the loop.

6. A weaving heddle as claimed in claim 5 wherein the openings in one part are disposed in part overlapping relationship relative to those of the other part.

7. A weaving heddle as claimed in claim 6 wherein the end loop consists of a folded piece of plate having the edges terminating in a joint and a side face area, the joint being positioned in the area of one .side face of the end loop.

l8. A weaving heddle comprising an end loop formed 4from a folded plate, ya heddle body extending between superimposed parts of the end loop, and detent formations in adjacent opposed walls of. the end loop into which the heddle body extends thus to preclude longitudinal movement thereof relative to the end loop, the detent formations of one wall being displaced in the longitudinal direction of the heddle body relative to those of the other wall.

9. A weaving heddle as claimed in claim 8 wherein the plate which forms the end loops is folded side by side so that the edges thereof abut and forms a joint which lies in the area of one wall of the end loop.

.10. 'In the method of making a heddle having a heddle body and an end loop, the steps of locating the end of said heddle body between superimposed parts of an end loop, each such superimposed part having detent formations in align-ment with the heddle body and across which the sai-d body extends, and applying pressure to the superimposed parts thus to deform the body and to cause said body to move into the .detents 11. In a heddle structure, comprising an elongated heddle body having alternate offset bent portions, and a heddle loop attached and clamped to the end of the heddle body, said heddle loop having wall portions extending on opposite sides of said heddle body and said wall portions being provided with offset and staggered openings for receiving said alternate offset bent portions o-f the heddle body.

UNITED References Cited by the Examiner STATES PATENTS 6 2,646,825 7/1953 Thorpe 139-96 2,691,389 10/1954 Thorpe 139-96 2,964,066 12/1960 Ramseier 139-95 FOREIGN PATENTS 372,255 11/ 1963 Switzerland.

M'ERVIN STEIN, Primary Examiner.

I. KEECHI, Assistant Examiner.

Claims

1. A WEAVING HEDDLE INCLUDING AT LEAST ONE END LOOP AND A HEADDLE BODY SECURED THERETO, SAID END LOOP HAVING SUPERIMPOSED PARTS FORMING INNER AND OUTER WALLS BETWEEN WHICH THE HEDDLE BODY EXTENDS, ONE END OF SAID HEDDLE BODY BEING HELD IN POSITION BY SAID PARTS AGAINST FRICTIONAL DISPLACEMENT, SAID INNER AND OUTER WALLS BEING PROVIDED WITH AT LEAST ONE CUT-OUT AND SAID HEDDLE BODY BEING PROVIDED WITH A LATERALLY EXTENDING OFFSET PORTION EXTENDING INTO SAID CUT-OUT TO SECURELY HOLD SAID HEDDLE BODY END BETWEEN SAID SUPERIMPOSED PARTS.