Tapping cowper

Claim 1

A TAPPING COWPER COMPRISING A VERTICAL CYLINDRICAL CASING, A VERTICAL WALL DIVIDING SAID CASING INTO A COMBUSTION WELL AND A STACKING, SAID VERTICAL WALL TERMINATING BELOW THE UPPER END OF SAID CYLINDER TO PROVIDE COMMUNICATION BETWEN SAID COMBUSTION WELL AND STACKING AT THE UPPER END OF SAID CYLINDER, CHECKERWORK HAVING VERTICAL BOIRES THERETHROUGH IN SAID STACKING, A BURNER FOR PRODUCING HOT COMBUSTION PRODUCTS IN SAID WELL, MEANS FOR DISCHARGING SAID COMBUSTION PRODUCTS FROM THE LOWER PORTION OF SAID STACKING WHEREBY SAID COMBUSTION PRODUCTS PASS THROUGH AND HEAT SAID CHECKERWORK, MEANS FOR INTRODUCING AIR TO BE HEATED AT THE LOWER PORTION OF SAID STACKING, MEANS FOR DISCHARGING A FIRST PORTION OF SAID AIR AT AN INTERMEDIATE LOCATION SUBSTANTIALLY BELOW THE TOP OF SAID STACKING AND PROVIDING A FIRST TAPPING CONDUIT PORTION OF SAID THEREIN, MEANS FOR DISCHARGING A SECOND PORTION OF SAID AIR FROM SAID COMBUSTION WELL AND PROVIDING A SECOND TAPPING CONDUIT HAVING A VALVE THEREIN, WHEREBY SAID FIRST PORTION OF AIR PASSES THROUGH A LOWER PORTION ONLY OF SAID CHECKERWORK AND IS HEATED THEREB WHILE SAID SECOND PORTION OF AIR PASSES THROUGH THE ENTIRE CHECKERWORK AND IS HEATED TO A HIGHER TEMPERATURE THAN SAID FIRST PORTION OF AIR, MEANS CONNECTED TO SAID FIRST AND SECOND TAPPING CONDUITS FOR MIING SAID FIRST AND SECOND PORTIONS OF DISCHARGED AIR AND MEANS DELIVERING THE RESULTING MIXTURE, AND MEANS INCLUDING SAID VALVES FOR SELECTIVELY VARYING THE PROPORTIONS OF SAID FIRST AND SECOND PORTIONS OF AIR TO CONTROL THE TEMPERATURE OF THE MIXTURE RESULTING FROM MIXING SAID FIRST AND SECOND PORTIONS OF AIR.