Abstract: The apparatus for making textile fiber strands has a principal drive unit and at least one auxiliary drive unit. At least one alternating current motor of the principal drive unit is provided with a supply current of an adjustable frequency by a frequency converter. The frequency converter or at least one of the frequency converters is connectable to at least one alternating current motor of at least one of the auxiliary drive units in an intermediate time interval in which the receiving members of the apparatus for the fiber strands being produced are not loaded with the fiber strands.

Abstract: The invention relates to a tangential-belt drive for a plurality of work units of the same kind, arranged at least in one row next to each other, of a machine for the production of twisted or twined yarns. The work units are divided into sections with at least approximately the same number of work units, each driven with an endless tangential belt. At least one electromotor is assigned to each section for driving the thereto pertaining tangential belt and guiding means for the tangential belt.In order to reduce the energy losses of such a tangential-belt drive, the width and thickness of the tangential belt used is considerably reduced, particularly to a width between 7 and 14 mm and a thickness between 2 and 2.7 mm. Size reduction becomes possible because the number of working units in each section is selected by considering the working capacity required by this number of work units and the acceptable belt stretch factor.

Abstract: The cooling apparatus for removal of heat from at least one compartment, enclosed space or the like containing electronic or electrical components comprises a metallic ribbed body mounted on the outside of or constructed as a part of a peripheral wall of the compartment and a blower mounted outside of the compartment acting to blow cooling air into the cooling air channels of the ribbed body facing it. The longitudinal direction of the cooling air channels of the ribbed body is so inclined to the direction of flow of the cooling air prior to deflection by the ribbed body that fuzz does not collect on the metallic ribbed body to such an extent that the heat transfer would be impaired. Advantageously, the ribbed body is inclined at an angle of from approximately 35.degree. to 55.degree., preferably from 40.degree. to 50.degree., with respect to the direction of flow of the cooling air before it is deflected.

Abstract: For compensation of changes in rotational speeds, for example, occurring because of varying loads on the motors, the drive mechanisms for at least two kinds of working units have a common synchronizing mechanism and are connected operably by a torque transfer device. The torque transfer device comprises, for example, a drive belt and two drive pulleys, each of which is attached to a different drive mechanism. The common synchronizing mechanism can comprise either a common rotational speed control or an adjustable current supply for the motors of the drive mechanisms.

Abstract: A machine for spinning or twisting yarn comprises a plurality of similar operating units, groups of which are each drivable by a tangential drive belt and a drive having a motor. Each of the tangential drive belts is connected with a drive belt performance observation mechanism, which shuts off the spinning or twisting machine, when the machine senses a deviation from the normal operation of the drive belt. The drive belt performance observation mechanism may also transmit the signal it produces either to a display device or to a sound producing device, so that the machine operator can take further action.

Abstract: A spinning or twisting machine comprises at least one operating unit, which is driven by a drive motor mounted near an operating unit, at least one suction or air duct, a heat collecting jacket for a drive motor at least partially enclosing the drive motor, and at least one connecting air duct connecting the heat collecting jacket with at least one suction or air duct so that heat generated at the drive motor can be exhausted through the duct. The ventilators normally associated with the drive motors can be eliminated or reduced in output and energy consumption.

Abstract: A spinner is disclosed having at least one drawing roller arrangement, the bottom rollers of which are driven by at least one electric motor. For the purpose of identifying specific malfunctions and setting errors, a monitor is allocated to the electric motor, or to at least one of the electric motors, which monitors its power input and/or torque.

Abstract: A device for controlling the output speed of a motor of a ring spinning machine, a ring twisting machine and the like in case of replacing travelers of such machines includes a speed setter for the motor and a potentiometer which is operatively connected with the speed setter to limit the output speed of the motor for allowing breaking in of replaced travelers. The potentiometer is further coupled with a speeding-up unit which is e.g. a stepper motor and which over a selected period of time increases the limited output speed to the normal operating level by automatically resetting the slider of the potentiometer from one end position to another end position.

Abstract: On a ring spinning or twisting machine which comprises a row of spindles on each of the two longitudinal sides of the machine, these spindles being drivable in common by a single tangential belt, at least one driven tangential belt drive roller is mounted in each longitudinal end region of the machine and at least at one other place therebetween. The other place is at the region of the substantially straight path of the tangential belt and has no looping, or only slight looping. The energy transmission is effected by pressing or gently looping the tangential belt against a friction drive roller by means of a pressing roller. The pressing roller may consist of the whorl of an operating unit of the machine. A back pressure roller may be associated therewith in order to ease its mounting.

Abstract: A textile machine has a spinning frame whose working elements, such as spindles, for respective whorls tangentially driven by a common belt. In order to allow energy efficient start-up of the individual whorls while the remaining whorls continue to be driven by the belt and without effecting the remaining whorls, the individual working element or spindles and their whorls are provided with a pivot pressing roller carrier whose pressing roller can hold the belt with normal pressing pressure at operating speed, can relieve the pressing pressure for braking of the individual whorl, and can press the belt with increased force against the individual whorl by manual operation of a lever individual to each mechanism for start-up.

Abstract: An emergency battery power supply for a ring-spinning or ring-twisting frame can be brought into operation by an automatic circuit to bridge brief power failures and effect programmed shutdown of the motors upon longer power failures, with the speed ratios between the motors being maintained substantially to standstill to avoid yarn breakage during shutdown.

Abstract: A drive system drives a plurality of whorls rotatable about respective whorl axes and having radially outwardly directed faces centered on the respective axes, forming a discontinuous whorl surface, and of a predetermined whorl width measured parallel to the respective axes. The system has an endless flat drive belt extending past the whorls generally perpendicular to their axes and having a first belt surface radially directly confronting the whorl surface and of a predetermined axial belt width measured parallel to the axes and pusher rollers bearing radially inward against the belt and urging the belt surface toward the whorl surface. A ridge is formed on one of the surfaces, radially engages the other surface, holds the rest of the other surface out of contact with the one surface except at the ridge, and is of a predetermined ridge width in contact with the other surface and measured parallel to the axes equal to at most one-third of the belt width.

Abstract: A spinning or twisting machine has a plurality of spindles which are rotatable about upright axes aligned in a row and which are each provided with a whorl tangentially engaged by the outer face of a straight stretch of a flat drive belt. This machine is driven by a system comprising a motor having an output pulley rotatable about an upright axis adjacent the flat drive belt, a drive wheel operatively tangentially engaging one face of the flat drive belt at a drive location, and another belt reeved over the output pulley and drive wheel and driving the latter from the former. A pinch roller is operatively engageable with the other face of the flat belt at the drive location and is pressed thereagainst to pinch the flat belt between the pinch roller and the drive wheel.

Abstract: An improved ring spinning machine for making a filled bobbin of yarn, thread or the like comprises at least one ring rail which moves up and down near a plurality of spindles driven by a ring rail drive. A control for the ring rail drive in case of an unforeseen machine stoppage, is arrayed so as to cause the ring rail drive, when it would otherwise drive the ring rail in the upward direction on restart because the ring rail was moving up at the time of shut-off, to reverse so that the ring rail moves downward no later than the time of restart of the spindles, so that the ring rail moves downward after the unforeseen machine stoppage at the beginning of restart thus providing for a safer, more reliable spinning operation.

Abstract: A cap spinning machine includes a spindle which supports a spool and a cap covering the spindle and the spool. The cap is supported in a freely rotatable manner and is brought into a rotating motion by the spindle via a thread which is guided around the outer surface of the cap to the spool. Consequently, the rotational speed of the cap is automatically controlled depending on the lagging of the cap behind the rotation of the spindle. By means of a driving and/or braking device, the driving force of the cap transmitted by the spindle via the thread is additionally controllable so that the tensile force of the thread and thus the closeness of the formed winding is influenced as well.

Abstract: In a ring spinning or other textile machine with a multiplicity of thread-winding stations each including one or more variable-speed motors, a central controller supplies periodic or continuous timing signals to respective speed setters of all stations for a predetermined progressive speed change of the associated variable-speed motors. In a specific embodiment, the timing signals are recurrent pulses for the advance of identical programs of the local speed setters whereby the several stations will follow the same routine but with possible relative staggering in time, taking individual delays due to thread breaks or the like into account.

Abstract: A strand-advancing system, particularly for a drawing frame, has an asynchronous electric motor powered from an alternating-current source and having a plurality of separate windings forming separate poles. This motor has a rotary output speed directly related to the advance speed of the filament. During normal operation the motor is driven at a relatively high nominal speed by connecting a relatively small group of its poles to the alternating-current source. The strand advance is stopped by first simultaneously disconnecting the relatively small group of poles from the alternating-current source and connecting a relatively large group of the poles to the source to operate the motor hypersynchronously generator-fashion for a relatively short time. Then the relatively large group is disconnected from the alternating-current source and the small group is energized with direct-current voltage until the motor and strand stop.

Abstract: In textile machinery wherein two or more loads--such as transport rollers of a tension frame and a bank of spindles carrying take-up spools--are driven by respective three-phase motors of the asynchronous (induction) type at speeds which are different from each other but are to be mutually correlated during an entire operating cycle including a startup and a cutoff period, the motor with the shorter acceleration time is slowed down during startup to let it reach its operating speed substantially at the same time as the other motor whereas the motor with the longer deceleration time is braked during cutoff in order to reach standstill substantially simultaneously with the other motor. The slowdown during startup and the braking during cutoff can be controlled by a comparator which determines deviations of the speed ratio of the two motors from a predetermined reference value.

Abstract: In order to minimize the current consumption of an alternating-current motor of the induction or the synchronous type (or possibly a plurality of such motors connected in parallel) driving a variable load, a sensor coupled to a supply line of the motor detects the occurrence of a significant change in its operating current and determines the sense of that change. A controller responsive to signals from the sensor then reduces the supply voltage by an incremental or decremental step and, if the sensor detects a resulting decrease in amperage, continues with one or more similar steps until the current levels off. If the initial voltage modification causes the current to rise, the controller progressively changes the supply voltage in the opposite sense until the amperage reaches a minimum.

Abstract: A ring spinning machine for spinning yarns comprised of finite length fibers has a plurality of spinning locations for combining two untwisted textile strands into a yarn to which a twist is imparted prior to winding up of the yarn. A sensor is associated at each spinning location which reacts to a break of one of the two fiber strands and causes an interruption of the spinning of the yarn. The sensor is designed to sense a characteristic of the yarn which changes in a manner recognizable by the sensor when the yarn is only being spun from one of the two fiber strands and an interrupter is provided which acts in response to the signal from the sensor to interrupt the spinning of the yarn upon the detection of a strand break.