Electrolytic apparatus

A cell for electrolytic apparatus comprising a pressure vessel, said pressure vessel comprising:

• a self-contained electrode unit having an inlet for the supply of electrolyte and an outlet for liberated admixed hydrogen and oxygen gas, said electrode unit having a plurality of spaced-apart concentric cylindrical electrodes and a pair of internal end plates provided at each end of said concentric cylindrical electrodes, at least one of said internal end plates including said electrolyte inlet and/or said gas outlet and at least one of said internal end plates including duct means for communicating the electrolyte between said concentric cylindrical electrodes by a circuitous path of a length longer than between adjacent said electrodes, and
• a cylindrical outer shell having planar transverse end plates connected at or adjacent opposed ends of said cylindrical outer shell, said cylindrical outer shell and said transverse end plates are made from steel, said pressure vessel capable of withstanding explosions of the liberated gas stored therewithin.