Air heating fireplace

Claim 1

IN A COMBINED FIREPLACE AND SPACE HEATER, A UNITARY BUILT-UP SHEET METAL PARALLELELPIPEDAL CASING COMPRISING TOP, BOTTOM, BACK, AND END WALLS, FIRST AND SECOND VERTICAL LATERALLY-SPACED PARTITIONS IN SAID CASING EACH HAVING ITS TO, BOTTOM AND BACK EDGES SECURED TO SAID TOP, BOTTOM AND BACK WALLS, RESPECTIVELY, TO DEFINE BETWEEN THEM A FORWARDLY-OPEN FIREPLACE SPACE IN WHICH FUEL MAY BE BURNED, THERE BEING AN OPENING IN SAID TOP WALL FROM SAID FIREPLACE SPACED FROM EGRESS OF COMBUSTION GASES, EACH SAID PARTITION DEFINING WITH SAID BOTTOM AND BACK WALLS AND ITS ADJACENT END WALL A CHAMBER OUT OF DRECT COMMUNICATION WITH SAID FIREPLACE SPACE, WALL MEANS COVERING THE FRONT OF EACH SAID CHAMBER, AN AUXILIARY FRONT WALL OVER THE UPPER PORTION ONLY OF THE FORWARD OPENING IN SAID FIREPLACE SPACE AND HAVING ITS UPPER AND END EDGES IN SEALED RELATION WITH SAID TOP WALL AND SAID PARTITIONS, RESPECTIVELY, AND A TUBULAR CONDUIT HAVING ITS ENDS SEALED IN OPENINGS IN SAID PARTITIONS RESPECTIVELY AND PASSING HORIZONTALLY THROUGH THE UPPER PORTION OF SAID FIREPLACE SPACE, BEHIND SAID AUXILIARY WALL, SAID TUBULAR CONDUIT BEING SPACED FROM SAID TOP, BACK AND AUXILIARY WALLS, BLOWER MEANS IN ONE SAID CHAMBER AND OPERABLE TO IMPEL AIR SUCCESSIVELY FROM ONE SAID CHAMBER, THROUGH SAID TUBULAR CONDUIT, TO THE OTHER SAID CHAMBER, AND CIRCUIT MEANS CONNECTED WITH SAID OTHER CHAMBER, FOR CONDUCTING AIR THEREFROM TO SPACE TO BE HEATED.