Abstract: An improved shed forming device having two-part heald holders the parts of which are secured together by a quickly detachable connecting means. The means connecting the two portions of the holder is made as a locking means in which the extremity of one portion of the holder is inserted or telescoped into the other portion and is held in the inserted position by a selectively releasable pawl. With the heald holders of the invention, warp threads may be drawn into the healds, when changing the weaving design or the number of healds in the individual holders, outside and away from the loom; thus reducing the idle time of the loom to a minimum. With the locking means there is preferably provided means for unlocking the pawl and for shifting the two portions of the holder relative to each other.The device of the invention may incorporate a cursor running or guide means extending across the loom, the cursor selectively locking the two portions of successive holders together or unlocking them from each other.

Abstract: An improved technique for presetting the adjustment cams that move the heddles of a travelling wave loom between their upper and lower shed-forming positions as described. The succession of control cams or guiding members, which engage actuating butts on the lower ends of the successive heddle members in the weaving region of the loom, are carried by a first endless conveyor; the succession of guiding members includes spaced adjustment portions including a slider element having three superposed cam track junction portions. A control section in the form of a travelling endless program member resembling a second endless conveyor upstream of the weaving region is selectively coupled to a link which engages a roller supported on the slider of each adjustment portion of the succession of guiding members. The link is movable into three positions corresponding to the three positions of adjustment of each slider.