Abstract: A shaft rod 2) according to the invention has, particularly in its mid region, a particularly low mass. The shaft rod has an upper ledge (11) and a lower ledge (12) which have a reduced thickness in the mid region of the shaft rod. As a result, the load induced by acceleration forces is significantly less in the mid region than in conventional constructions. By virtue of the reduced acceleration forces, the extent of bending of the shaft rods in the middle is less and therefore a shaft rod of such a structure is better adapted for use in very rapidly operating weaving machines.

Abstract: A heddle frame (1) is driven via drive rods (15), which pass through its lateral sampsons (13). To that end, the lateral sampsons (13) each have a corresponding channel (19). The play between the circumferential face (22) of the drive rods (15) and the channel wall face (21) of the respective channel (19) has an intermediate layer (24), which extends over the full length, or portions, of the drive rod (15). The intermediate layer (24) preferably comprises an impact-proof, permanent-elastic, damping material. A slight residual play allows the introduction of the drive rods (15) and the intermediate layer (24) into the channel (19) without force.

Abstract: In a heddle (6), the slender heddle shank (21) has been lengthened, at the cost of the end eyelets (7, 8) and the yarn eyelet region (29). This is accomplished on the one hand by shortening the end eyelet regions (7, 8) to their absolute minimum length and on the other by placing the auxiliary openings (38), which serve to transport the heddles, closer to the end eyelets (7, 8). The radii R in the region of the end eyelets (7, 8) are reduced. Instead of the usual 2 mm width, the heddle shank (21) still has a maximum width of 1.6 mm. The regions (14, 13) of the heddle (6) that protrude past the end openings still have, instead of the usual length of 4 mm, a length of 2.5 mm to 3 mm. Directly around the yarn eyelet (33), the heddle has a width which, as before, is equivalent to twice the width of the yarn eyelet (33). However, the length of this region is shortened to a maximum of twice to three times the yarn eyelet width.

Abstract: A support element for a heddle frame is formed by profiled pieces (1, 1?) at each end that consist of a polymeric material. The profiled pieces (1, 1?) are connected to one another at each side by at least two side pieces (2, 2?) made of a metallic material. At the inside cavity of the body formed by the profiled pieces (1, 1?) and the side pieces (2, 2?) there is a separate core (4) arranged, and the inner surfaces of the side pieces (2, 2?) are provided with a layer of insulating material.

Abstract: A shed forming device (1) for a power loom has a plurality of heddle shafts, to which a drive mechanism with a plurality of servo motor groups (13, 14) is assigned. The servo motor groups are located below each of the heddle shafts (3 through 8), in each case as a cluster, and they are located with their pivot axes (27 through 32) on a circle, an ellipse, or a similar figure. They are also axially offset from one another. Each servo motor (15 through 20) is provided with a driven lever (21 through 26). The free ends of all the levers are located approximately at the center of the circle or ellipse or other figure of revolution. They are connected to the heddle shafts (3 through 8) via connecting rods (34 through 39) and form various angles with the connecting rods (34 through 39). The result is a drive mechanism with little inertia, low resilience, and little play. Very fast shaft motions can be attained in a controlled way.

Abstract: A heddle (14) of the invention is distinguished by end eyelets (15, 16) of reduced size, with which heddle support rails (6, 7) of reduced cross section are associated. The axial play of the heddles on the heddle support rails (6, 7) is limited to from 0.5 mm to 1.5 mm. The lateral play is in the range of 0.2 mm to 0.5 mm. This system formed of heddle support rails and heddles is especially suitable for particularly rigid heddle shafts for power looms with an extremely high operating speed.

Abstract: A loom shaft for a heddle has two end eyes in which at least one eye is elongated in the longitudinal direction of the heddle such that even during operation and bending of the shaft in the region of the shaft center, the distance between an inner rail edge of the heddle support rail and the region of the cutout end of the eye and the outer rail edge of the opposite heddle support rail is greater than the distance between the inner stop of the cutout end eye and the outer stop of the opposite end eye. The inner edge facing the heddle support rail may be of elastic material on at least one support bar of the shaft to prevent impact of heddles against the support bar during high stress placed on the shafts.

Abstract: In a heddle (6), the slender heddle shank (21) has been lengthened, at the cost of the end eyelets (7, 8) and the yarn eyelet region (29). This is accomplished on the one hand by shortening the end eyelet regions (7, 8) to their absolute minimum length and on the other by placing the auxiliary openings (38), which serve to transport the heddles, closer to the end eyelets (7, 8). The radii R in the region of the end eyelets (7, 8) are reduced. Instead of the usual 2 mm width, the heddle shank (21) still has a maximum width of 1.6 mm. The regions (14, 13) of the heddle (6) that protrude past the end openings still have, instead of the usual length of 4 mm, a length of 2.5 mm to 3 mm. Directly around the yarn eyelet (33), the heddle has a width which, as before, is equivalent to twice the width of the yarn eyelet (33). However, the length of this region is shortened to a maximum of twice to three times the yarn eyelet width.

Abstract: A loom shaft for a heddle has two end eyes in which at least one eye is elongated in the longitudinal direction of the heddle such that even during operation and bending of the shaft in the region of the shaft center, the distance between an inner rail edge of the heddle support rail and the region of the cutout end of the eye and the outer rail edge of the opposite heddle support rail is greater than the distance between the inner stop of the cutout end eye and the outer stop of the opposite end eye. The inner edge facing the heddle support rail may be of elastic material on at least one support bar of the shaft to prevent impact of heddles against the support bar during high stress placed on the shafts.

Abstract: A support element for a heddle frame is formed by profiled pieces (1, 1′) at each end that consist of a polymeric material. Said profiled pieces (1, 1′) are connected to one another at each side by at least two side pieces (2, 2′) made of a metallic material. At the inside cavity of the body formed by said profiled pieces (1, 1′) and said side pieces (2, 2′) there is a separate core (4) arranged, and the inner surfaces of said side pieces (2, 2′) are provided with a layer of insulating material.

Abstract: A heddle system for mechanical looms consisting of heddles (51) as well as upper and lower heddle slide bars (52, 53) that are attached to a heddle frame whereby said heddles are lined up on said heddle slide bars. Said heddles are provided with two end eyes (56, 57) whereby the ones (56) that are disposed within the heddle frame and above the warp threads have less play in longitudinal direction of the heddles, while said heddle eyes encompass the upper heddle slide bar (52), in comparison to the particular end eyes (57) that are disposed below the warp threads. The upper and lower heddle slide bar has each a different cross-sectional dimension or a difference width according to one embodiment version.

Abstract: Weaving heddles, intended for paired operation, are rendered spring-like resilient in the areas adjacent the end eyes to prevent breakage of the heddles in operation by the high degree of dynamic loading. Such spring-like resiliency is achieved by a provision of a shape change, such as a recess or inwardly bowed section, in the heddles adjacent the end eyes and at a location between the adjacent end eyes and the elongated shaft section of the heddle body.

Abstract: Weaving heddles adapted to be arranged in pairs on a heddle frame of a weaving machine have at least three deformations or corrugations provided to space the individual heddles of the pair apart and to space the pair of heddles apart from adjacent heddles in adjacent pairs. A first of the deformations is located at one of the end loops at the upper end of the pair, a second of the deformations is located at one of the end loops at the lower end of the pair, and a third of the deformations is spaced a predetermined distance in a direction toward the thread eye of the heddle away from the end loop at the lower end of the pair.

Abstract: A heddle shaft is formed of shaft rods which have hollow ends containing inserts fixedly positioned therein and lateral supports which include projections that respectively extend into recesses in the inserts. Clamping screws, which can extend through the shaft rods, apply a compressive force to clamp the projections in place and create detachable corner connections between the shaft rods and the lateral supports.

Abstract: A weaving loom shaft has removable heddle support bars to facilitate their replacement in the loom shaft upon movement of the support bars solely toward one another in the plane of the weaving loom shaft. Slidable telescopic connectors are utilized for removably mounting the heddle support bars in place, such that the heddle support bars can be replaced in the loom shaft upon movement in a direction solely toward the center of the shaft perpendicular to the parallel support rods of the loom shaft.

Abstract: A heddle frame of spaced, horizontal hollow shafts and spaced hollow side supports are corner interconnected by an angled joint element having an elongated leg portion extending within the side supports at opposite ends and beyond open longitudinal slots at such opposite ends through which protrusions of the joint element extend for extension into the opposing ends of the horizontal shafts. The leg portions of the joint elements are connected along the length thereof to the side supports by rivets, screw fastener, spot welds or adhesive.

Abstract: A heddle for a weaving machine is in the form of an elongated strip having opposed end portions lying in a common flat plane, the strip having a thread eye portion intermediate such end portions. The thread eye portion lies in a plane rotated in the range of 10.degree. to 20.degree. about the central axis of the heddle, the eye portion comprising a pair of spaced legs defining a thread eye. The legs lie in respective planes parallel to and spaced from opposite sides of the common flat plane of the heddle.

Abstract: A rotary switch is provided in a dobby with a rotation drive and has for controlling the coupling part an annular collar. During rotation of the drive shaft, the coupling part is guided actively by the rotary switch, the position of which during this time is releasably secured by a lock. For this purpose, a differential lever is arranged on the dobby, the position of which varies based on feedback through a rocking lever and a rail which indicates the position of the heddle frame. The reading of a point on the pattern card results automatically in the correct engaging or disengaging movement of the coupling part, independent of its position.

Abstract: Two rotation heddle frame units pivotally engage the respective ends of a differential lever, which units move the center of the differential lever in a patternlike manner between three different positions. The movement of the center of the differential lever is transmitted, through a rocking lever, onto a plate which, in spite of the three different lever positions, moves an angle lever and thus the heddle frame into only two positions, namely, the upper and lower shed positions. The heddle frame moves without any intermediate stop between its two end positions. Since each lifting unit stands still during the operating movement of the other unit, this standstill time, together with the duration of a possible shed standstill of the weaving machine, is available for actuating the lifting unit, and a higher weaving speed is thus possible.