Water tube boiler

Claim 1

A WATER TUBE BOILER CONSTRUCTIOON, COMPRISING A SUBSTANTIALLY RIGHT RECTANGULAR PRISMATIC HOUSING, A VERTICAL PARTITION WITHIN AN EXTENDING ALONG THE LENGTH OF SAID HOUSING AND DIVIDING THE HOUSING INTO A COMBUSTION CHAMBER AND A CONVECTION CHAMBER, A BURNER DIRECTED INTO ONE END OF SAID COMBUSTION CHAMBER SUBSTANTIALLY AXIALLY OF THE LONGITUDINAL DIMENSION OF THE CHAMBER, A STEAM DRUM ALONG THE TOP OF SAID COMBUSTION CHAMBER AND EXTENDING SLIGHTLY INTO SAID COMBUSTION CHAMBER AND EXTENDING SLIGHTLY OUT OF THE TOP SURFACE OF SAID HOUSING, SAID COMBUSTION CHAMBER HAVING A FIREPROOF LINING, A WATER DRUM IN SAID LINING AND EXTENDING ALONG THE BOTTOM OF SAID COMBUSTION CHAMBER, BOILER TUBES EXTENDING FROM SAID WATER DRUM TO SAID STEAM DRUM THROUGH SAID COMBUSTION CHAMBER, FURTHER BOILER TUBES EXTENDING FROM SAID STEAM DRUM TO SAID WATER DRUM THROUGH A LINING IN THE SIDE OF SAID COMBUSTION CHAMBER, A PLURALITY OF COILED TUBES IN SAID CONVECTION CHAMBER, EACH TUBE HAVING A PLURALITY OF SUBSTANTIALLY RECTANGULAR COILS WHICH LIE IN SUBSTANTILLY VERTICAL PLANES IN THE CONVENTION CHAMBER, THE ONE ENDS OF SAID COILED TUBES BEING CONNECTED TO ONE END OF SAID STEAM DRUM AND CIRCULATING PUMP MEANS TO WHICH THE OTHER ENDS OF SAID COIL TUBES ARE CONNECTED, SAID CIRCULATING PUMP MEANS BEING CONNECTED TO THE OTHER END OF SAID STEAM DRUM, A SUBSTANTIALY HORIZONTAL PARTITION EXTENDING ALONG THE LENGTH OF SAID HOUSING AND COVERING THE TOP OF SAID CONVECTION CHAMBER, MEANS FORMING AN OPENING BETWEEN SAID VERTICAL PARTITION AND SAID HOUSING AT THE END REMOTE FROM SAID BURNER FOR ADMITTING COMBUSTION GASES INTO SAID CONVECTION CHAMBER, A PLURALITY OF TRANSVERSE HORIZONTALLY SPACED BAFFLES IN SAID CONVECTION CHAMBER, ALTERNATE BAFFLES EXTENDING UPWARDLY FROM THE BOTTOM OF THE CONVECTION CHAMBER AND THE REMAINDER EXTENDING DOWNWARDLY FROM THE HORIZONTAL PORTITION, SAID HORIZONTAL PARTITION DEFINING AN AIR PREHEATING CHAMBER BETWEEN ITSELF AND THE TOP WALL OF THE CASING, A PLURALITY OF COMBUSTION GAS PIPES EXTENDING LONGITUDINALLY OF THE CASTING THROUGH SAID AIR PREHEATING CHAMBER AND HAVING THEIR ONE ENDS OPENING INTO SAID CONVECTION CHAMBER ADJACENT THE END OF SAID CASTING WITH THE BURNER THEREIN AND HAVING THE OTHER END OPENING OUT OF THE CASING AT THE OTHER END OF THE AIR PREHEATING CHAMBER, PASSAGE MEANS BETWEEN SAID CASING OF ONE END OF SAID AIR PREHEATING CHAMBER FOR ADMITTING COMBUSTION AIR INTO THE AIR PREHEATING CHAMBER, A DUCT OPENING OUT THE OTHER END OF SAID AIR PREHEATING CHAMBER AND EXTENDING TO SAID BURNER, AND BAFFLES IN SAID AIR PREHEATING CHAMBER FOR CAUSING COMBUSION AIR TO TRAVEL A ZIGZAG ACROSS SAID COMBUSTION GAS PIPES.