Dual purpose space heater

Claim 1

IN SEALED COMBUSTION CHAMBERS FOR WALL MOUNTED SPACE HEATERS OF THE TYPE WHEREIN A PAIR OF GENERALLY RECTANMGULAR VERTICALLY ARRANGED SHALLOW PAN-SHAPED METAL STAMPINGS ARE JOINED TO EACH OTHER ALONG THEIR MARGINAL EDGES IN FACING ABUTMENT TO FORM A HOLLOW CHAMBER, SAID CHAMBER HAVING PARALLEL FRONT AND BACK VERTICAL UPPER WALLS AND PARALLEL FRONT AND BACK VERTICAL LOWER WALLS, SAID LOWER WALLS BEING SPACED FROM EACH OTHER A SUBSTANTIALLY GREATER DISTANCE THAN THE DISTANCE BETWEEN THE UPPER WALLS AND BEING JOINED TO THE RESPECTIVE UPPER WALLS BY TAPERING SYMMETRICALLY ARRANGED INTERMEDIATE WALLS, SAID CHAMBER BEING PROVIDED WITH AN AIR INLET OPENING AT THE BOTTOM AND A COMBUSTION PRODUCTS OUTLET OPENING IN A VERTIIICAL WALL AT THE TOP, SAID INTERMEDIATE WALLS SERVING TO DELAY THE FLOW OF COMBUSTION PRODUCTS FROM THE LOWER PORTION OF THE CHAMBER AND THE UPPER PORTION OF THE CHAMBER BEIING PROVIDED WITH MEANS TO RESTRICT THE FLOW OF COMBUSTION PRODUCTS TO SAID OUTLET MEANS, SAID RESTRICTION MEANS INCLUDIING A PAIR OF INWARDLY DIRECTED RIBS FORMED IN THE RESPECTIVE UPPER FRONT AND BACK WALLS AND VERTICALLY OF SET WITH RESPECT TO EACH OTHER BE LOW THE LEVEL OF THE OUTLET OPENING AND EXTENDIING HORIZONTALLY ACROSS SUBSTANTIALLY THE ENTIRE WIDTH OF THE CHAMBER.