Sulzer Brothers Limited

Hans Demuth

Erwin Pfarrwaller

Frantisek Jankovsky

Danilo Vezzu

Walter Gruber

Jose R Ferreira

Walter Stumpp

The picking mechanism is provided with two torsion bars. One torsion bar is stressed in order to accelerate a gripper projectile of the loom. The second torsion bar, upon release of the first torsion bar, is temporarily connected to the first torsion bar so that energy can be stored by the second torsion bar via a double-arm lever. During a return motion of the acceleration lever to a picking position, the second torsion bar is relieved of tension by delivering the stored energy to the drive shaft of the picking mechanism via the double arm lever. The picking mechanism thus uses only little energy.

Dual torsion bar picking mechanism for a loom

The return device for the projectiles of a gripper projectile weaving machine has an end position brake employing an abutment in the form of a piston which is guided in the cylinder and which experiences the light pressure of a restoring spring. The ratio of the mass of the projectile to the mass of the piston at a given projectile speed is such that the projectile stops immediately upon striking the piston. The piston does not experience local wear over extended periods of time and obviates any need for a means to prevent a bounce-back of the projectile.

Return device for the projectile of a gripper projectile weaving machine

The tensioning apparatus for adjusting the tension of a whip roll in a weaving machine employs an adjustable eccentric element which is connected to the tension spring. The eccentric element includes an eccentrically mounted pin which can be moved about an axis of the eccentric element in order to make an adjustment in the force supplied to the tensioning lever by the spring.

Tensioning apparatus for a whip roll of a weaving machine

The catcher is operated so that prior to moving the projectile back into the ejection position, the brake block of the second braking station is disengaged while the first brake block remains in a braking position. Friction on the projectile and brake linings of the second braking station is reduced with a corresponding reduction in wear. In one embodiment, the braking stations are constructed with independent brake blocks. In a second embodiment, a common brake block may straddle the two braking stations.

Catcher and a method of operating a gripper projectile catcher

The deflection beam is mounted independently of the tensioning beam to permit raising and lowering of the deflection beam when mounting a warp beam on the loom. The deflection beam is mounted on a support which is secured to a support beam via a detachable clamp connection. A pivotally mounted roller lever which rides on a cam track on the support is used for raising and lowering the support and deflection beam.

Loom having an adjustable deflection beam

A knot hole beam, for instance a warp beam for looms, for winding-up yarns or the like, comprising a winding tube or cylinder provided at its periphery with knot holes, each knot hole possessing an insertion bore serving for the insertion of a bundle of tied together or knotted yarn or thread ends and at least one, therewith merging knot arresting opening of narrower shape than the insertion bore. Between the insertion bore and the knot arresting opening there is provided at least at one side of the knot hole edges an arresting projection for the inserted knot. Such arresting projection protrudes towards a line which is axially parallel to the lengthwise axis of the tube and extends through the center of the insertion bore. The arresting projection is situated closer to such axially parallel line than an outer peripheral portion of the knot arresting opening which is situated furthest therefrom.

Knot hole beam

The clips which are used to transfer the yarn, e.g. a ribbon yarn, have clamping surfaces which are disposed in cross-wise manner but at an inclined angle from a true perpendicular. For example, the clamping surfaces of one clip are inclined at an angle of at least 4.degree. from the perpendicular to the clamping surfaces of the other clip. The inclination of the clamping surfaces to each other may be obtained by setting the clamping surfaces at an angle to the jaws of the clips. Also, the clamping surfaces may be twisted within a clip.

System for transferring a yarn from one part of a textile machine to

The eccentric drive for moving the heddle frames between a top shed position and a bottom shed position is constructed to form symmetrical sheds not only for large frame movements but also for small frame movements. In one embodiment, the link between the cam-actuated lever and the deflecting lever is pivoted on the deflecting lever and secured to one of a plurality of positions on the cam-actuated lever. These positions are located on a curved line which has a center of curvature located away from the axis on which the link is mounted on the deflecting lever. These positions are formed by a toothing, a row of apertures or an elongated slot.

Eccentric drive for a dobby

The means for forming a fabric border is constructed with a cover to cover over the opening in the housing through which the operating element projects. The cover is formed by flange projections on the drive means for moving the operating element or by a separate sleeve-like part having a flanged appendage on the operating element. The cover is intended to prevent dust and lint from entering the housing.

Growing community of inventors

Winterthur, Switzerland

Hans Demuth