Abstract: A two-way variable-section control valve for a refrigeration circuit, having a movable member for choking a refrigerant passage interposed between the inlet and outlet of the valve; the position of the movable member is controlled by a wax actuator having a bulb fitted with an electric resistor supplied by a control circuit; and the bulb is immersed in and cooled rapidly by the refrigerant when the heat supplied by the resistor is reduced, thus ensuring rapid response.

Abstract: A refrigeration system, particularly for controlling the temperature of an environment, and presenting a compressor; a condenser; a laminating thermostatic valve; an evaporator; an evaporation pressure control valve interposed between the outlet of the evaporator and an inlet of the compressor; an economizer in turn presenting a laminating orifice downstream from the condenser, and a flash tank with an inlet communicating with the orifice, a liquid-phase outlet connected to the thermostatic valve, and a gaseous-phase outlet connected to an intermediate inlet of the compressor; and a tapping valve interposed between the outlet of the compressor and the flash tank, and which is opened when the pressure in the flash tank falls below a predetermined threshold value.

Abstract: An electrolyte-activated battery, particularly for generating electric energy for the propulsion of underwater systems, and presenting a reservoir, an electrochemical cell, and a system for forming and circulating the electrolyte between the reservoir and the electrochemical cell; the electrolyte forming and circulating system presenting an inlet conduit communicating with the outside environment, a circulating pump, a device for regulating the temperature of the electrolyte at the inlet of the electrochemical cell, and a gas separator located at the outlet of the electrochemical cell and presenting a liquid phase outlet, and a gaseous phase outlet connected to an outlet conduit; the system also presenting a switching device for selectively connecting the liquid phase outlet to the inlet conduit and the outlet conduit.

Abstract: An electrolyte-activated battery, particularly for generating electric energy for the propulsion of underwater systems, and presenting a reservoir, an electrochemical cell, and a system for forming and circulating the electrolyte between the reservoir and the electrochemical cell; the electrolyte forming and circulating system presenting an inlet conduit communicating with the outside environment, a circulating pump, a device for regulating the temperature of the electrolyte at the inlet of the electrochemical cell, and a gas separator located at the outlet of the cell and presenting a liquid phase outlet connectable to the circulating pump, and a gaseous phase outlet connected to an outlet conduit; the inlet and outlet conduits presenting respective closure members facing and rigidly connected to each other so that they are subjected to the same but opposite hydrostatic pressures, and which are movable between a closed position and an open position wherein they are housed inside the respective conduits.