Abstract: A storage battery of the lead-acid type has unipolar electrodes (6) and bipolar electrodes (7), having a tubular shape fastened preferably perpendicularly to walls (3, 4) made of an insulating material, which divide container into two or more adjacent cells (1) containing the electrolyte. In a preferred embodiment, each tubular electrode (6, 7) is formed by an axial bar (8) of lead or an alloy thereof, having a circular section, surrounded by active material (9), either positive or negative, in its turn enclosed by a coaxial tubular sheath (10) in porous synthetic and insulating material, and end plates (11, 12) of plastic material. The exteriorly extending ends (13), of the bars (8) of the unipolar tubular electrodes (6) of each of the end cells are connected to a respective external bus bar (14) for the current. The external bus bar (14) constitutes a pole of the storage battery.

Abstract: In a method for the production of a polyvalent metal, particularly titanium, by the cathodic dissolution of a halide of the metal in an electrolyte of alkali or alaline earth metal halides and the electro-extraction of the dissolved metal ions, the electro-extraction stage is carried out with the use of a composite electrode including an anode and a framework surrounding the anode and provided with metal partitions capable of anodic dissolution for confining within the framework a bath of alkali or alkaline earth metal halides which does not contain ions of the metal to be produced, and then applying a potential between the anode and the framework to cause the formation of an accumulation of alkali metal or alkaline earth metal by cathodic reduction, after which a potential is applied between the anode and the cathode to cause the deposition of the metal to be produced at the cathode and the simultaneous anodic dissolution of the partitions.

Abstract: The plant for the electrolytic production of a metal in a molten salt bath by deposition at the cathode in the solid state includes an outer casing, means for maintaining an atmosphere inert to the metal to be produced in the casing, a container within the casing and arranged to contain the molten salt bath and having a movable cover, a plurality of electrodes suspended in the molten salt bath each bearing on means for supporting it and connecting it electrically, the means comprising for each of the electrodes a pair of electrically conductive elements facing each other and supported respectively by two opposite walls of the container and handling means associated with the outer casing for removing any one of the electrodes from the container after raising of the movable cover.