Abstract: An electrolytic cell is suitable for production of aluminium, and includes at least one collector bar made of first metal and at least one complementary bar made of a second metal having an electrical conductivity greater than the first metal and arranged adjacent to one of the side faces of the collector bar so that the external end of the complementary bar is at a specified distance from a specified end face of the block. The second end terminates so as to limit heat losses from said cell. The cell makes it possible to obtain significantly lower voltage drops while avoiding excessive heat losses through the collector bars.

Abstract: An electrolytic cell is suitable for production of aluminium, and includes at least one collector bar made of first metal and at least one complementary bar made of a second metal having an electrical conductivity greater than the first metal and arranged adjacent to one of the side faces of the collector bar so that the external end of the complementary bar is at a specified distance from a specified end face of the block. The second end terminates so as to limit heat losses from said cell. The cell makes it possible to obtain significantly lower voltage drops while avoiding excessive heat losses through the collector bars.

Abstract: The harvester for picking up berries comprises a frame adapted to be driven in a field of berries, a comb mounted between opposite sides of the frame and comprising a plurality of teeth extending substantially in a horizontal position to seize branches of berries as the frame is driven in the field. The harvester is provided with a sweeping system mounted on the frame above the comb for sweeping the berries of the branches seized by the comb. The sweeping system preferably comprises a brush parallel to the comb and comprising a rotatable shaft operatively mounted between the opposite sides of the frame and a plurality of bristles circumferencially distributed around the shaft.