Abstract: A rotary machine tool that includes first and second slides mounted on a bed for opposed movement transverse to the axis of rotation of a workpiece. Each of the first and second slides includes facility for mounting a cutting tool for engaging diametrically opposite sides of the workpiece from directions transverse to the workpiece axis of rotation. A control mechanism is coupled to the first slide for moving the first slide relative to the bed for controlled engagement of the cutting tool on the first slide with the workpiece. A hydraulic actuator is coupled to the second slide for moving the second slide relative to the bed in a direction transverse to the workpiece axis. A synchronizing valve is operatively coupled to the first slide for operating the actuator responsive to movement of the first slide so as to move the second slide by means of the actuator in a manner equal and opposite to movement of the first slide by the controller.

Abstract: A UPS having a ferroresonant transformer is selectively switched from AC line voltage to an inverter by a control method and apparatus using fuzzy logic to select an optimum switching point. The control apparatus and method senses output load current, output voltage and input voltage. Output current is used to calculate output load as a percentage of full load. First membership functions relating to percent load, second membership functions relating to output voltage, third membership functions relating to input voltage switching points, and rules using percent load membership and output voltage membership as antecedents and values of input voltage switching points as consquents as determined by regulation characteristics of the ferroresonant transformer, are used to execute a fuzzy inference and generate dynamic input voltage switching points for comparison with line input voltage to control switching of the UPS between line and inverter sources.

Abstract: In view of increased risks for physicians and personnel to catch old and new virus infections like hepatitis-B and aids, the invention provides pre-cleaning of medical hand instruments by mechanical cleaning means, e.g. brushes (38, 39) lamellas or plastic pads disposed below the liquid surface of a disinfecting solution in a possibly closed cleaning container (31) or in a cleaning trough (30).Proposed are advantageous embodiments preventing a spattering of contaminated particles into the environment. In this connection it is proposed to use an additional disinfecting trough (41) at the work place serving as an emergency relief aid for persons injured at the work place. The invention may be used also in non-medical practices, e.g. in barber, manicure, pedicure, cosmetic and tatooing shops and offices to protect the personnel and clients from infections.