Production of elemental sulfur

Claim 1

IN APPARATUS FOR PRODUCING ELEMENTAL SULFUR FROM GASEOUS HYDROGEN SULFIDE BY BURNING PART OF THE HYDROGEN SULFIDE TO FORM SULFUR DIOXIDE AND REACTING THIS FULFUR DIOXIDE WITH REMAINING HYDROGEN SULFIDE, AN ELONGATED DRUM OF SUBSTANTIALLY UNIFORM CROSS SECTION DISPOSED ON ITS SIDE AND ENCLOSING A PLURALITY OF SUCCESSIVE PORTIONS EACH EXTENDING ACROSS THE DRUM AND COMPRISING A COMBUSTION CHAMBER FOR THE HYDROGEN SULFIDE AT THE FRONT OF THE DRUM, A FIRST WATER JACKET FOLLOWING THE COMBUSTION CHAMBER AND PROVIDED WITH A RELATIVELY FEW TUBES OF LARGE CROSS SECTION SPACED FROM EACH OTHER AND EXTENDING LONGITUDINALLY OF THE DRUM THROUGH THE JACKET AND OPENING AT ONE END INTO THE COMBUSTION CHAMBER, A FIRST OPEN CHAMBER IMMEDIATELY FOLLOWING THE FIRST WATER JACKET WITH THE OTHER END OF THE TUBES OF LARGE CROSS SECTION OPENING THEREINTO, A SECOND WATER JACKET FOLLOWING THE FIRST OPEN CHAMBER AND PROVIDED WITH RELATIVELY NUMEROUS TUBES OF SMALL CROSS SECTION SPACED FROM EACH OTHER AND EXTENDING LONGITUDINALLY OF THE DRUM THROUGH THE SECOND WATER JACKET AND OPENING AT ONE END INTO THE FIRST OPEN CHAMBER, AND A SECOND OPEN CHAMBER FOLLOWING THE SECOND WATER JACKET WITH THE TUBES OF SMALL CROSS SECTION OPENING THEREINTO AT THEIR OPPOSITE END, A CONDUIT CONNECTED TO AND OPENING INTO THE BOTTOM OF THE SECOND OPEN CHAMBER FOR DRAINING ELEMENTAL SULFUR THEREFROM, A VAPOR OUTLET CONDUIT CONNECTED TO AN UPPER PORTION OF THE SECOND OPEN CHAMBER, THE DRUM BEING PROVIDED WITH MEANS FOR INTRODUCING THE HYDROGEN SULFIDE AND AN OXYGENCONTAINING GAS INTO THE COMBUSTION CHAMBER, AND THE COMBUSTION CHAMBER AND THE TWO WATER JACKETS EACH BEING SUBSTANTIALLY LONGER THAN SAID FIRST AND SECOND CHAMBERS.