Sodium sulphur cells

Claim 1

A sodium-sulphur cell having a. a metal outer tubular member open at one end and closed at its other end, b. an inner tubular member extending substantially coaxially of the outer tubular member and open at its end adjacent the open end of the outer tubular member and closed at its other end, the inner tubular member constituting a solid electrolyte for the cell and dividing the cell into anode and cathode compartments, one said compartment being formed by the interior of the inner tubular member and the other said compartment being formed by the annular space between the inner and outer tubular members, c. an inturned radial flange on the outer tubular member, d. an out-turned radial flange on the inner tubular member, e. first compressible sealing means through which said out-turned radial flange abuts said inturned radial flange to close the annular space between said inner and outer tubular members, f. a closure member for closing said open end of the inner tubular member, g. second compressible sealing means through which said closure means abuts said out-turned radial flange, and h. a clamping member having an inturned radial flange which abuts said closure member and is held in position by said outer tubular member so that it applies a compression force axially of said tubular members to both said first and second sealing means.