US1107296A - Heddle. - Google Patents

Description

JULIUS GROB, OF HORGEN, SWITZERLAND.

HEDDLE.

To all whom it may concern:

Be it known that I, JULIUs GRon, a citizen of the Republic of Switzerland, residing at Horgen, Switzerland, have invented certain new and useful Improvements in Heddles, of which the following is a specification.

In the manufacture of sheet metal heddles for looms it is the custom at present to form the loops thereof whereby the bed dles are strung on the cross-rods of the harness shafts by a punching operation which produces simultaneously an appreciable displacement of the metal on both sides of the entering tool, for the purpose of distending the slit formed to an extent suificient for it to receive shaft-rods of suflicient cross-sectional dimension to be capable of properly supporting the complete set of heddles; sometimes the metal is first transversely stretched and then the eye or loop referred to is formed by punching, pressing or cutting out the middle of the stretched part. Either of these methods of forming the loop has the disadvantage that the metal of the heddle at the loop is very considerably weakened, especially at each end of the loop; it is for this reason that, as is well known, the ends of heddles frequently become broken off. Besides, this method of forming the loops possesses the disadvantage that the danger of unduly weakening the heddles in forming the loops makes it necessary to limit the width of the loops, in consequence of which it is generally impracticable to employ cross-rods hav "ing round or otherwise appreciable crosssections, notwithstanding there are many instances where cross-rods of this kind are desirable.

The object of this invention is to provide a heddle wherein the loops by which the same are strung on their supporting crossrods may have any necessary size or form, for instance, round as well as elongated, and yet the metal of the heddles remain unstretched and hence unweakened. This object, briefly stated, is accomplished by forming a longitudinal slit in the metal at the place where the loop is to be, and bending the material at both sides of the slit in opposite directions out of its original plans; in order to bring the axis of the loop thus produced into angularity with reference to that. of the thread eyelet or mortise Specification of Letters Patent.

Application filed March 5, 1913.

Patented Aug. 18, 1914.

Serial No. 752,008.

of the heddle (2'. e., into angularity with respect to the plane of the heddle, which of course must stand flatwise or broadside to the line in which the thread extends therethrough when in operative position in the shaft), so that it may be strung on the cross-rods of the shaft and allow the thread held and guided thereby to feed freely therethrough, the loop-including portions of the heddle are twisted or turned more or less out of .coincidence with, the plane of the body of the heddle.

Referring, now, to the accompanying drawing, Figures 1 and 2 show in side and front elevation one form of the heddle produced in accordance with this invention; Figs. 3 and 4 are fragmentary views in side and front elevation of a modification of the same; Fig. 5 is an enlarged plan view of a group of the heddles shown in Figs. 1 and 2 strung on'a cross-rod; Fig. 6 is an enlarged. front elevation illustrative of the spacing of the body parts of the heddles shown in Fig. 5; Fig. 7 is a plan of a group of the heddles shown in Figs. 3 and 4 strung on a crossrod; and, Fig. 8 is an enlarged front elevation illustrative of the spacing of the body parts of the heddle shown in Fig. 7.

Referring, now, to Figs. 1 to at of said drawings, a is a heddle of well known type, the same having a well-known form of warp thread eyelet or mortise b.

To form the loop in each end portion of the heddle, whereby the same is adapted to be strung on the cross-rods of the harness shaft, a slit is first formed, extending longitudinally of the heddle, and then the metal at both sides of said slit is bent in opposite directions, as at 0 0 in Figs. 1 and 2 and d (Z in Figs. 3 and 4, and so that their relatively inner edges 0' and d (Figs. 5 and 7) lie both substantially inta plane perpendicular to their original plane; or the slitting and bending maybe performed simultaneously. The portions so 'bent in opposite directions may have any desired shape, for instance, so as to produce the circular loop shown in Figs. 1 and 2 or the elongated loop shown in Figs. 3 and 4, according to the size and shape which it is desired or necessary that the cross rods of the harness shaft should have. I

In order to bring the axis of the loop thus produced into the desired angularity with reference to that of the thread eyelet or mortise Z) the end portion of the heddle including the thus-formed loop is bent or twisted into a plane having angular relation to the plane of the body part of the heddle.

Figs. 1 and 2 and about 90 in the heddle shown in Figs. 3 and 4.

According to the extent to which this twisting 0r bending is carried it will be obvious that, further, the spacing of the body parts of the heddles, and hence of the threads they support, may vary; and yet all the heddles may be crowded or nested in closely disposed relation so far as their 100pforming portions are concerned.

Having thus fully described my invention,

what I claim and desire to secure is:

The herein-described sheet-metal heddle thus forming a loop to receive a cross-rod of a harness shaft, said portions having their relatively inner edges both substantially in a .plane perpendicular to the first-named plane and each loop-including part of the heddle being twisted into angular relation to the plane of the thread-eye-including por tion of the heddle, substantially as described. In testimony whereof I atfix my signature in presence of two witnesses.

JULIUS GROB. Witnesses:

CARL GREBLER, AUGUST RUEGG.

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