Apparatus for heating blast furnace stoves

Claim 1

A BLAST FURNANCE STOVE COMPRISING A HOLLOW STRUCTURE, CHECKERWORK IN SAID STRUCTURE EXTENDING FROM A POINT ADJACENT THE BOTTOM THEREOF TO A POINT ADJACENT THE TOP THEREOF, A FIRST CONDUIT OPENING INTO SAID HOLLOW STRUCTURE ADJACENT THE BOTTOM THEREOF BELOW THE CHECKERWORK, A VALVE FOR CONTROLLING FLOW OF AIR THROUGH SAID FIRST CONDUIT INTO SAID STRUCTURE, A SECOND CONDUIT OPENING INTO SAID HOLLOW STRUCTURE ADJACENT THE BOTTOM THEREOF BELOW THE CHECKERWORK, A VALVE FOR CONTROLLING FLOW OF BURNT GASES FROM SAID STRUCTURE THROUGH SAID SECOND CONDUIT, A THIRD CONDUIT OPENING INTO SAID HOLLOW STRUCTURE ABOVE SAID CHECKERWORK, A VALVE FOR CONTROLLING FLOW OF HEATED AIR FROM SAID STRUCTURE THROUGH SAID THIRD CONDUIT, SAID HOLLOW STRUCTURE HAVING AN UPWARDLY EXTENDING OPENING THROUGH THE TOP THEREOF, AN INNER SHELL BASKET MOUNTED ON TOP OF SAID HOLLOW STRUCTURE AROUND SAID OPENING WITH ITS AXIS SUBSTANTIALLY VERTICAL, SAID INNER SHELL BASKET HAVING OPENINGS THROUGH ITS WALL, AN OUTER SHELL MOUNTED ON TOP OF SAID HOLLOW STRUCTURE AROUND SAID INNER SHELL BASKET CONCENTRIC THEREWITH, A CONDUIT FOR DELIVERING FUEL TO THE TOP OF SAID INNER SHELL BASKET, A CONDUIT FOR DELIVERING COMBUSTION AIR TO THE SPACE BETWEEN SAID INNER AND OUTER SHELLS ADJACENT THE TOP THEREOF, AND VALVE MEANS BETWEEN SAID INNER BASKET AND THE HOLLOW STRUCTURE.