Abstract: A method for optimizing the spinning geometry of a spinning machine in which the lengths of the path segments between the drafting output and rolls and the yarn guide, between the yarn guide and the balloon constricting ring, between the balloon constricting ring and the traveller, or other angles are controlled in response to the yarn break frequency and/or spinning force and, when necessary, the spindle speed is also controlled to minimize the spinning force. The system can use a fuzzy logic.

Abstract: A stop motion apparatus for a drafting device for roving in a textile machine includes a stop member into roving stopping engagement with the intake feed rollers of the drafting device by operation of an actuating rod. The actuating rod includes a notch having an undercut surface for engagement by a plunger element. Preferably, the undercut surface is transversely arcuate and the plunger element includes a plastic sleeve element compatibly configured with the actuating rod notch. the plunger element is selectively insertable into, and retractable from, the notch of the operating rod by an electromagentic assembly operatively connected to a yarn break monitor. The stop motion apparatus includes a shaft having a forked end for manually clearing the plunger element from the actuating rod notch.

Abstract: An improvement in a roving stop motion for a spinning machine of the type having a series of pairs of drafting rollers, the stop motion including a clamping member mounted on a lever arm drivenly connected to an actuating rod by a carriage which is selectively mountable at differing locations along the actuating rod. The actuating rod is responsive to roving breakage to drive the lever arm to cause the clamping member to separate the feed rollers from one another and press the roving against one roller. The positionability of the carriage enables the lever arm to be properly disposed with respect to the feed rollers when the spacing between the roller pairs is varied.

Abstract: Apparatus for guiding the travel of roving between succeeding roller pairs at a spinning machine drafting station having telescoping tube members defining a roving guide channel therethrough and displaceable apart from one another to be variable in length for adjustable disposition between the nip areas of the successive roller pairs throughout a full range of different spacings therebetween.

Abstract: Apparatus for spinning yarn from roving including a spinning frame with spinning units arranged thereon. The roving to be drawn is fed from a common double-roving bobbin to each of two neighboring spinning units, further referred to as spinning units pair. At least one stopping device is assigned to each of the spinning units of the spinning units pair, to stop and release again the roving feed to the two drawing frames of the respective spinning units pair. The purpose of the stopping device is to reduce the loss of roving and to avoid the danger of yarn lapping on the drawing rollers. The stopping device can be actuated by each of two yarn break sensors of the spinning units pair for the simultaneous arrest of the roving. In a second embodiment a yarn-setting carriage is provided on the spinning frame to correct a yarn break, such correction occuring only when all correction hindering conditions are absent.

Abstract: A traveler for spinning rings, twisting rings and the like includes a plastic part with a given mass and a metal part having at most the given mass. The metal part is disposed on the plastic part at a point facing away from the axis of the ring.

Abstract: Controlling the stop of the feed of roving in a spinning machine in which yarn is wound on spindles through travelers rotating on rings and in which a stop motion is actuated to stop the feed of the roving to drafting rolls in response to detecting a yarn break and is subsequently deactuated to permit roving feed during a yarn break repair operation. The stop motion includes an arcuate stop member rotatably mounted on one of the drafting rolls for rotation into disposition between opposing rolls to separate the rolls and stop roving feed, with the stop member having a projecting cam engaging in a recess in a slide member that is manipulated by a spring and electromagnetic device to control manipulation of the stop member.

Abstract: A service device in a ring spinning machine is moved after a yarn break to the appropriate spinning position to separate the broken yarn end from the winding by generating an air blast that acts on the yarn end. If the winding build-up is in a stage in which the initial winding cone has not yet been completed, the air blast is set at a high value so that a relatively strong separating force acts on the broken yarn end. If, on the other hand, the build-up of the winding cone has been completed, the separating force acting on the yarn end is less. The stage of the winding build-up is determined with the aid of a switch, which is connected to a stop member that contacts and rests on the ring rail of the spinning position. The setting of the two air blasts is performed by a switchable trottle.

Abstract: Along the ring bank of a twisting or spinning machine is provided a shaft rotatable about an axis parallel to the ring bank and supporting holders for thread-break sensors inductively responding to the orbiting of the travelers. Since the holders are independent of the ring bank, they can be swung out of the way to allow replacement or maintenance of the ring bank.

Abstract: Spinning machine in which the upper rollers of the drafting units are arranged at pressure arm assemblies, whereby each pressure arm assembly has a main arm and an operating lever which is positionally arranged above the main arm and radially movable. To each work location of the machine are assigned signal lights for indicating disruptions at the work location. For optimum visibility from distant locations, the indicator lights are provided at the operating levers.

Abstract: A nozzle for the pneumatic release of a broken yarn end in a spinning or twisting frame has a plurality of mutually parallel closely spaced passages trained at an angle to the yarn package so that the individual jets in closely spaced relationship are collectively effective to liberate the broken yarn end and enable it to be captured by a suction hood.

Abstract: A nozzle for liberating a broken yarn end from a yarn package in a spinning or twisting frame is either tiltable or has selectively actuatable orifices to alter the angle at which the jet or jets for dislodging the broken yarn end is trained to the yarn package. The change in the angle is effected during the course of package building and the liberated yarn end can be captured by a suction hood.