Radiant gas burners

Claim 1

A RADIANT GAS BURNER COMPRISING A CAST METAL MEMBER HAVING A RECTANGULAR BURNER BODY IN PLAN, SAID BODY HAVING AN UPPER RECTANGULAR WALL WITH AN INTEGRAL UPWARDLY EXTENDING FLANGE EXTENDING ABOUT ALL SIDES OF SAID WALL FORMING A RECTANGULAR TRAY, SAID BODY HAVING A DEPENDING INTEGRAL CONTAINER FORMING A GAS MANIFOLD AND HAVING PARALLEL SIDES WALLS AND A BOTTOM WALL AND PROVIDED WITH A CENTRAL INLET PORT, SAID BOTTOM WALL COMPRISING TWO PARTS SLOPING UPWARDLY TOWARD BOTH ENDS TO DISTRIBUTE GAS UNIFORMLY TO THE UPPER WALL AND SAID UPPER WALL HAVING AN UPWARDLY CONVEX RIDGE PROVIDED WITH A MULTIPLICITY OF CENTRALLY LOCATED TRANSVERSE NARROW MILLED BURNER SLOTS LOCATED IN SAID UPWARDLY CONVEX RIDGE IN THE TRAY ABOVE AN INVERTED V-SHAPED GROOVE IN THE LOWER SIDE OF THE UPPER WALL, THE DEPTH OF CUT INTO THE V-SHAPED GROOVE BELOW THE UPPER WALL VARYING THE LENGTH OF THE SLOTS TO DETERMINE THE VOLUME OF GAS DISCHARGED, AND A CERAMIC RADIANT BODY HAVING A LOWER RECTANGULAR BASE RECEIVABLE IN SAID TRAY AND HAVING A PAIR OF LONGITUDINALLY EXTENDING SIDE WALLS JOINED BY A PLURALITY OF INTEGRAL TRANSVERSE VANES EXTENDING FROM SIDE TO SIDE OF SAID SIDE WALLS,