Flat rectifier stack

Claim 1

A FLAT RECTIFIER ASSEMBLY COMPRISING A PLURALITY OF FLAT SELENIUM CELLS, EACH CELL HAVING A BASE PLATE AND A SELENIUM COATING SURFACE THEREON, A PLURALITY OF FLAT METAL TERMINAL PLATES EACH HAVING A PAIR OF OPPOSITE SIDE CONTACT SURFACES AND AN UPWARDLY PROJECTING SOLDERING LUG AT ITS UPPER EDGE, SAID CELLS AND TERMINAL PLATES BEING STACKED WITH AT LEAST TWO OF SAID CONTACT SURFACES OF SAID TERMINAL PLATES IN CONTACT WITH TWO SELENIUM SURFACES OF SAID CELLS, A SHEET METAL CASE BENT TO U SHAPE AND HAVING PARALLEL SIDES AND A WEB PORTION COINNECTING SAID SIDES, SAID STACK OF SELENIUM CELLS AND TERMINAL PLATES DISPOSED WITHIN SAID CASE WITH AN EDGE THEREOF PARALLEL TO AND SPACED FROM SAID WEB AND HAVING THE RESPECTIVE FLAT SURFACES OF THE END MEMBERS OF SAID STACK ENGAGING THE INNER SURFACES OF THE SIDES OF THE CASE IN A SNUG FIT, AND WITH SAID SOLDERING LUGS PROJECTING LATERALLY FROM THE CASE, AND THE SIDES OF THE CASE HAVING MARGINS EXTENDING OVER THE RESPECTIVE EDGES OF THE CELLS AND PLATES IN SAID STACK AND TOGETHER WITH THE PERIPHERAL EDGES OF THE STACK FORMING A TROUGH AROUND THE PERIPHERAL SIDES OF THE CASE AND STACK, AND A POLYMERIZED INSULATIVE POTTING COMPOUND FILLING THE TROUGH AND COVERING THE PERIPHERAL EDGES OF THE CELLS AND PLATES WITH THE SOLDERING LUGS PROJECTING THROUGH AND EXPOSED ON THE EXTERIOR SIDE OF THE COMPOUND.