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: 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: A spinning machine for the production of yarn in which at each spinning station, a yarn break sensor is provided in conjunction with a sliver-stopping unit. The latter is electrically actuated and to reduce peak current draw upon simultaneous thread breaks, a time-delay circuit, e.g. using shift registers, is provided to time-stagger the operation of the stopping units.

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.