Jet air circulator

Claim 1

THE COMBINATION WITH A ROOM HAVING A FLOOR AND A CEILING; AND A ROOM AIR CIRCULATING FLUE ADAPTED TO EXTEND VERTICALLY FROM THE ROOM FLOOR TOWARD THE CEILING, AND HAVING A ROOM AIR RETURN OPENING IN THE FLUE ADJACENT THE FLOOR OF THE ROOM AND AN OUTLET OPENING INTO THE ROOM ADJACENT THE CEILING; OF AIR BLOWER MEANS HAVING AN INTAKE FOR RECEIVING FRESH AIR FROM OUTSIDE SAID ROOM; A PLENUM CHAMBER; SAID BLOWER MEANS DISCHARGING FRESH AIR INTO SAID PLENUM CHAMBER; SAID CHAMBER BEING WITHIN SAID FLUE AND INCLINED UPWARDLY, TOWARD, AND TERMINATING IN AN OPEN END FIXED ABOVE THE UPPER MARGIN OF AND SPACED INWARDLY OF THE FLUE AIR RETURN OPENING; A WALL IN SAID CHAMBER FOLLOWING THE INCLINATION THEREOF AND EXTENDING FROM A LOWER END INTERMEDIATE SAID BLOWER MEANS AND SAID CHAMBER OPEN END AND DIVIDING SAID CHAMBER INTO UPPER AND LOWER PASSAGEWAYS, ONE OF SMALLER CROSS-SECTIONAL AREA THAN THE OTHER, BOTH OF SAID PASSAGEWAYS DISCHARGING FROM SAID CHAMBER OPEN END; A DAMPER IN SAID OTHER PASSAGEWAY HINGED TO A LOWER PORTION OF SAID WALL ADJACENT ITS SAID END AND NORMALLY FALLING UNDER INFLUENCE OF GRAVITY ACROSS AND CLOSING SAID OTHER PASSAGEWAY; SAID SMALLER AREA PASSAGEWAY DISCHARGING THROUGH THE CHAMBER OPEN END INTO SAID FLUE BETWEEN SAID OTHER PASSAGEWAY DISCHARGE AND THE SIDE OF THE FLUE OPPOSITE SAID ROOM AIR RETURN OPENING.