Electrode boiler

Claim 1

An electrode boiler for operation at substantially atmospheric pressure comprising a substantially cylindrical container made up of identical hollow upper and lower parts each closed at one end and open at the other end and moulded from a synthetic plastic material, the parts being placed with their open ends in juxtaposition, each part having a central connection at its closed end to form a steam outlet in the upper part and a water connection in the lower part, each part being formed with bosses which, in the upper part, are drilled through, a plurality of electrodes mounted in the drilled bosses, a circumferential enlargement forming a bead around the open end of each part, each bead being defined by a flat annular surface at the open end, a cylindrical portion extending from the flat surface, and a tapered portion extending from the cylindrical portion, indexing means on the annular flat surfaces to locate the two parts against relative rotation or transverse movement, and an endless elastic member around the two beads, the elastic member having two ring-shaped portions which closely embrace the two parts and an intermediate raised portion containing an internal groove with tapered sides corresponding with the tapered portions of the beads, the elastic member serving to draw the two parts together in their relatively located positions and to provide a liquid seal.