Sulzer Brothers Limited

Erwin Pfarrwaller

Danilo Vezzu

Hans Demuth

Frantisek Jankovsky

Oskar Hubner

Eberhard Seifert

Rudolf Lehn

Kurt Nick

The lubricant mist is supplied in timed fashion to at least one nozzle (31, 36, 40, 45) associated with a lubrication station in the zone of movement of a moving part (32, 37, 41 and 34 respectively). The timed supply of the mist is effected in dependence upon the position of a drive shaft from which the moving part derives its movement. The lubricant mist can therefore be supplied to the lubrication station in an accurately dosed quantity only when it is needed there. A possible use of the lubricating method is for looms where it is particularly important that the web of cloth produced on the loom should not be soiled by lubricant.

Method of and device for timed lubrication by means of a lubricant mist

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

A projectile accelerator has a coupling transmission articulated between a cam follower lever and a picking lever which has two end positions. The projectile accelerator also has an eccentric rocker on the drive shaft which cooperates with a tensioning lug on the accelerating shaft in order to carry out a return motion of the picking lever without need for a large angular movement of the cam follower lever. The picking lever is able to traverse large angles of movement while the cam following lever traverses reduced angles of movement.

Projectile accelerator for a loom

The torsion bar firing device is provided with a striking lever having an end piece at the distal end which acts directly on the abutment face of a projectile on firing. The striking face of the end piece of the striking lever and/or the abutment face of a projectile may be formed as inclined planes or as convex, concave, or concave-convex surfaces. The direct drive of the projectile by the striking lever reduces the masses to be accelerated and braked. This advantageously influences the energy consumption and the weaving efficiency of the projectile weaving loom. The end piece may be integral with the distal end of the striking lever or may be in the form of a rotatably mounted roller of a trapezium shaped element.

Firing device for a projectile weaving machine and projectile therefor

A picking mechanism for a loom including a projectile lift which points a projectile into a ready-to-pick position is made with a guide profile cross section open on the striking side. The projectile opener is provided with an additional guide element to guide the projectile body during movement into the ready-to-pick position. After positioning, the projectile opener with the guide element pivots away to expose a semi-circular space on the striking side of the projectile for the operation of a picking mechanism. The opener guide element may engage with an outer surface of the projectile during pivoting or may be positioned coaxially of a gripper opener to engage an internal surface in an additional passage in the projectile.

Projectile opener and lift for a projectile loom

The plastic projectile with an associated projectile opener has a projectile clip having arcuate parts. The projectile opener exerts forces both transversely and lengthwise of the picking direction on the arcuate parts of the clip for simultaneous opening and positioning relative to these two directions. A through aperture in the plastic casing is not touched by the projectile opener. The problem of wear in connection with conventional positioning on the plastic casing therefor disappears. A projectile made of abrasion-resistant impact-resistant plastic facilitates oil-free operation and ensures very high cloth quality.

Gripper projectile

The projectile housing is made with thin-wall section at least in the central third of the housing. In addition, internal projections are provided on the housing walls in order to support the thin-wall section of the housing on the clamping arms of the weft thread clamp. In one embodiment, the thin-wall section may be formed by a sleeve which is joined in opposite ends to the remainder of the projectile housing. Alternatively, the sleeve may extend to the rear end of the housing while being supported on enlarged jaws located on the ends of the clamping yarns.

Shuttle projectile for a weaving machine

The projectile guide comprises guide teeth whose exit aperture for the weft yarn is subject to the following conditions in relation to the projectile:

Guide for a weft-picking projectile in a weaving machine

The tensioning beam assembly has a tensioning beam and/or support beam mounted in step bearings located across the width of the weaving machine. Sagging of the tensioning element is eliminated and reduced diameter tensioning elements and support beams can be used. The tensioning element may be formed as a solid shaft which is rotatably mounted in individual step bearings on the support beam or fixedly mounted by connecting pieces to the support beam. In one embodiment, the tensioning element is in the form of a plate which is secured directly to the support beam and which has a curved outer end over which the warp threads pass. In still another embodiment, the tensioning element is in the form of a U-shaped plastic strip which is mounted about a projection extending along the support beam.

Tensioning beam assembly for a weaving machine

At a fabric take-off apparatus the deflection rod arranged forwardly of the cloth take-off roll, is provided at both halves thereof with opposite pitch threaded grooves and, if desired, at the ends thereof with spreader-needle rolls. The fabric, directly after travelling on to the take-off roll, is stretched in its width. Upon departing from the take-off roll the fabric or cloth, at the region where it leaves the take-off roll and arrives at a deflection roll, therefore does not tend to become wider due to the appreciably lower tension of the cloth beam. In this way the formation of creases or folds in the fabric cloth is avoided, which otherwise could be permanently formed at the contact location or nip between the cloth take-off roll and the subsequently arranged deflection beam or roll.

Take-off apparatus for the fabric web of a textile machine, especially a

The fabric take-off device comprises a fabric take-off roller mounted to be movable transversely of its longitudinal axis and two associated rod-shaped fabric guide elements which are mounted on fixed axes for supplying the fabric to the take-off roller and for taking the fabric away from the roller. The fabric tension causes the take-off roller to be pressed against the two guide elements due to the movable mounting of the roller. This contact-pressure force increases automatically as the cloth tension increases. A very reliable fabric take-off is obtained without slipping of the fabric on the take-off roller. To avoid damage to the fabric, the take-off roller need not have a rough surface nor need any pins, but may have a relatively smooth surface made, for example, of plastics.

Fabric take-off device

The drive mechanism for a reciprocating sub-mechanism on a weaving machine, e.g. for a cam for raising a projectile into the picking line, comprises a dead-center type crank drive. The drive is pivoted to and fro continually through 180.degree.. The connecting rod, which drives the projectile raise cam, is kept practically completely in the standstill position in the two crank standstill positions. This rod is mounted on an eccentric section of the crank pin so that small reciprocating movements of the crank in the dead-center positions due to play in the parts driving them cannot be transmitted to the connecting rod and projectile raise cam. The eccentric section of the crank pin can also be adjusted.

Drive mechanism for a sub-mechanism of a weaving machine

A cam drive is used to control the picking movement of the picking lever. The cam drive includes a dam disc which has a recess (or projection) which causes the lever to accelerate at the beginning of a pick and thereafter imparts a prestress to the spring before the cam follower of the lever moves out of the cam disc recess. A dog clutch is used to permit movement of the cam disc relative to the uniformly rotating drive shaft.

Picking mechanism for a shuttle of a weaving machine

A method of operating a catcher mechanism in a gripper projectile weaving machine and a catcher mechanism for performing the method are disclosed. The projectile ejection portion of the catcher mechanism is operated by opening the projectile yarn clip, ejecting the projectile from the picking path, closing the yarn clip and moving the members of the ejection mechanism out of the picking path by pivoting the members sufficiently to permit immediate entry of a following projectile prior to returning the ejection mechanism to the initial position.

Catcher mechanism in a gripper projectile weaving machine and method of

A catcher mechanism for the weft picking means of a weaving machine which facilitates higher machine speed. Included in the catcher mechanism is a picking means brake, a sensing element movable into the path of the picking means, and a push-back member for pushing the picking means away from its stop position and into a yarn release position. The sensing element has the end thereof adjacent the picking means in engagement with a spring member so that the sensing element is movable along with the push-back member in the push-back direction, such movement being against the force of the spring.

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Winterthur, Switzerland

Erwin Pfarrwaller