Van ackeren

Claim 1

IN A REGENERATIVE MASONRY UNDERJET COKING RETORTOVEN, THE COMBINATION COMPRISING: A ROW OF COKING CHAMBERS, WITH TWO SETS OF VERTICAL HEATING FLUES THEREFOR OPERABLE IN ALTERNATION AS "ON" AND "OFF" BURNING COMBUSTION FLUES; A FUEL GAS LOW BURNER AT THE BOTTOM OF EACH FLUE AND A FUEL GAS HIGH BURNER AT A LEVEL ABOVE THE BOTTOM OF EACH FLUE; AIR REGENERATORS BELOW SAID ROW OF COKING CHAMBERS AND HEATING FLUES AND COMMUNICABLY CONNECTED WITH THE BOTTOMS OF THE HEATING FLUES, SAID REGENERATORS BEING MOUNTED ABOVE AN ACCESSIBLE BASEMENT SPACE; SEPARATE FUEL GAS RISER CHANNELS IN THE REGENERATOR MASONRY EXTENDING FROM THE BASEMENT SPACE INDIVIDUALLY UPWARDLY TO THE SEPARATE HIGH AND LOW BURNERS INEACH OF THE HEATING FLUES; WASTE GAS RECIRCULATING DUCTS COMMUNICABLY CONNECTING THE HIGH BURNER RISER CHANNELS OF THE TWO SETS OF HEATING FLUES WITH EACH OTHER IN THE REGION OF THE BOTTOMS OF THE REGENERATORS; FUEL GAS INTRODUCTION MEANS COMPRISING INDIVIDUAL FUEL GAS UNDERJET DUCTS FOR EACH OF THE HIGH AND LOW RISER CHANNELS WITH REGULABLE ORIFICE MEANS FOR INDIVIDUALLY ADMITTING FUEL GAS INTO THE SEPARATE RISERS IN THE FORM OF A JET, THE REGULABLE ORIFICE MEANS OF THE UNDERJETS FOR THE HIGH BURNER RISER CHANNELS BEING SO DISPOSED WITH RESPECT TO RECIRCULATING DUCTS INCOMMUNICATION THEREWITH AS TO ASPIRATE A FLOW OF WASTE GASEOUS COMBUSTION PRODUCTS INDIVIDUALLY INTO THE HIGH BURNER RISER CHANNELS WHEN OPERABLE FOR ONFLOW FROM HEATING FLUES OF THE SET THEN OPERABLE AS "OFF" BURNING FLUES, THROUGH THEIR IDLE HIGH BURNER RICH GAS RISERS AND THROUGH THE INTERCONNECTING WASTE GAS RECIRCULATING DUCTS, AT A VELOCITY INDEPENDENT OF THE VELOCITY OF FLOW OF THE JETS INTO THE LOWER BURNER RISER CHANNELS, TO DILUTE THE RIGH GAS FOR THE HIGH BURNER RISER CHANNELS TO A COMPOSITION WHICH REMAINS SUBSTANTIALLY UNDECOMPOSED AND FREE OF CARBON DEPOSITION WHILE RISING TO THE HIGH BURNERS.