Pebble heating chamber

Claim 1

AN IMPROVED PEBBLE HEATING CHAMBER COMPRISING AN UPRIGHT CLOSED OUTER SHELL HAVING AN UNBROKEN SIDE WALL; INSULATING MEANS WITHIN AND ADAPTED SO AS TO INSULATE SAID SHEL; PEBBLE INLET MEANS CERTRALLY DISPOSED INT THE UPPER PORTION OF SAID HEATING CHAMBER; A BAFFLE MEMBER DISPOSED BELOW SAID PEBBLE INLET MEANS AND IN THE UPPER PORTION OF SAID HEATING CHAMBER, SAID BAFFLE EXTENDING DOWNWARDLY AND OUTWARDLY FROM AN APEX TOWARD THE SIDE WALL OF SAID CHAMBER; GASEOUS EFFUENT OUTLET MEANS IN THE UPPER PORTION OF SAID HEATING CHAMBER; A PERFORATE REFRACTORY LOADSUPPORTING DOME WITHIN SAID CHAMBER, INTERMEDIATE THE ENDS OF SAID HEATING CHAMBER AND DIVIDING SAID CHAMBER IN A HEATING ZONE ABOVE SAID DOME AND A COMBUSTION ZONE BELOW SAID DOME; PEBBLE OUTLET CONDUIT MEANS EXTENDING SUBSTANTIALLY CENTRALLY THROUGH SAID DOME AND DOWNWARDLY THROUGH SAID COMBUSION ZONE AND THE BOTTOM OF SAID SHELL; AND A PLUARLITY OF UPRIGHT BURNERS IN THE BOTTOM OF SAID SHELL, SPACED INWARDLY FROM THE SIDE WALL OF SAID HEATING CHAMBER AND DISTRIBUTED ABOUT SAID COMBUSTION ZONE.