Abstract: A hydraulic motor having variable speed and torque capabilities is comprised of a housing which provides a primary chamber and a plurality of secondary chambers spaced apart about the primary chamber and opening radially thereinto. A primary gear is supported for rotation in the primary chamber, and a secondary gear is supported for rotation in each of the secondary chambers and in meshing engagement with the primary gear. Each secondary chamber is provided with a pair of ports for connecting the chamber with a source of hydraulic fluid under pressure, whereby fluid flow across the secondary chamber rotates the secondary gear to impart rotation to the primary gear and an output shaft associated therewith. A hydraulic fluid flow control system provides for selectively controlling fluid flow to each of the secondary chambers, thus enabling driving of the primary gear and output shaft in opposite directions and with variable speed and variable torque characteristics in each direction.

Abstract: A plurality of portions of an open-end spinning machine are dynamically coupled to a plurality of magnetic discs for generating a plurality of pulse sequences indicative of the operating speed of the spinning unit portions, i.e., sliver supply speed, yarn withdrawal speed, etc. The so-generated sequences of pulses are routed through a cyclically operated multi-tap switch into a main and an auxiliary binary counter. The output states of the various counters are out-pulsed to a memory and to a data transmission line after being filled during each switching interval of the multi-tap switch, such interval normally being set by a clock pulse generator. In order to generate ratios of the measured quantities, i.e., the machine draft, the clock pulse generator is overridden and the auxiliary counter initially measures a quantity (i.e., the sliver input rate) indicative of the divisor of the ratio.