Baseboard heater

Claim 1

A GAS-FIRED HORIZONTALLY ELONGATED COMBUSTION UNIT FOR A SPACE HEATER, THE LENGTH OF SAID UNIT BEING SUBSTANTIALLY GREATER THAN THE VERTICAL AND TRANSVERSE DIMENSIONS, SAID UNIT HAVING WALLS DEFINING THREE ELONGATED CHAMBERS EXTENDING LONGITUDINALLY OF SAID UNIT AND DISPOSED ONE ABOVE THE OTHER, THE LOWERMOST CHAMBER HAVING A GENERALLY UNIFORM TRANSVERSE CROSS SECTIONAL AREA ALONG ITS LENGTH AND COMMUNICTING ALONG ITS LENGTH WITH THE BOTTOM OF THE INTERMEDIATE CHAMBER, SAID LOWERMOST CHAMBER HAVING AT LEAST ONE AIR INLET OPENING THEREIN AND CARRYING AN ELONGATED GAS BURNER TUBE WHICH EXTENDS SUBSTANTIALLY THE LENGTH OF SAID LOWERMOST CHAMBER, THE UPPERMOST CHAMBER HAVING A VERTICAL DIMENSION WHICH INCREASES FROM EACH END TOWARD THE MIDDLE THEREBY EFFECTING A TRANSVERSE CROSS SECTIONAL AREA WHICH IS GREATEST AT THE MIDDLE, THE WALL AT THE LOCATION OF GREATEST VERTICAL DIMENSION HAVING A HORIZONTALLY FACING COMBUSTION GAS OUTLET OPENING, SAID INTERMEDIATE CHAMBER BEING OF LESSER LENGTH AND LESSER TRANSVERSE DIMENSION THAN SAID LOWERMOST CHAMBER AND SAID UPPERMOST CHAMBER, SAID INTERMEDIATE CHAMBER TAPERING UPWARDLY AND INWARDLY TOWARD THE LONGITUDINAL CENTER LINE OF SAID UNIT THEREBY FORMING A SLOT OF RELATIVELY SMALL WIDTH EXTENDING THE LENGTH OF SAID INTERMEDIATE CHAMBER, SAID SLOT COMMUNICATING ALONG ITS LENGTH WITH THE BOTOM OF SAID UPPERMOST CHAMBER, SAID GAS BURNER TUBE BEING SEALED AT ONE END AND OPEN AT THE OTHER END TO RECEIVE GAS, THE WALL OF SAID UNIT WHICH DEFINES THE END OF SAID INTERMEDIATE CHAMBER REMOTE FROM THE OPEN END OF THE BURNER TUBE BEING INCLINED UPWRADLY AND INWARDLY TOWARD THE TRANSVERSE CENTER LINE OF SAID UNIT FROM THE BOTTOM OF SAID INTERMEDIATE CHAMBER TO THE LOWERMOST EDGE OF SAID SLOT AND THEN INCLINED UPWARDLY AND OUTWARDLY AWAY FROM SAID TRANSVERSE CENTER LINE, SAID UNIT FURTHER COMPRISING A SMALL GENERALLY L-SHAPED BAFLE DISPOSED IN SAID INTERMEDIATE CHAMBER NEAR THE OPEN END OF SAID GAS BURNER TUBE, SAID BAFFLE HAVING A HORIZONTAL LEG PORTION BLOCKING COMMUNICATION BETWEEN SAID INTERMEDIATE CHAMBER AND SAID LOWERMOST CHAMBER, SAID BAFFLE HAVING AN UPSTANDING PORTION REMOTE FROM THE OPEN END OF SAID BURNER TUBE.