Apparatus for shielding door openings by means of air

Claim 1

APPARATUS FOR SHIELDING A DOOR OPENING IN A WALL OF A STRUCTURE BY MEANS OF A PLURALITY OF AIR STREAMS TO RESTRICT PASSAGE OF HEATED AIR FROM THE STRUCTURE TO THE ATMOSPHERE WHICH IS AT LOWER TEMPERATURES, COMPRISING, (A) AN AIR INTAKE AND DISTRIBUTING CHAMBER MOUNTED UPON AN OUTER FACE OF A STRUCTURE WALL ABOVE AND EXTENDING ACROSS THE SAID DOOR OPENING AND PROVIDED WITH BOTTOM OPENINGS ADJACENT EACH END THEREOF FOR INTAKE OF AIR FROM ABOVE SAID DOOR OPENING, (B) THREE SPACED VERTICALLY DISPOSED AIR DISTRIBUTION DUCTS AT EACH SIDE OF A DOOR OPENING BENEATH SAID AIR DISTRIBUTION CHAMBER AND ARRANGED IN A PLANE NORMAL TO A STRUCTURE WALL, EACH SAID DUCTS AT EACH SIDE OF A DOOR OPENING BEING CONNECTED WITH SAID AIR INTAKE AND DISTRIBUTION CHAMBER OUTWARDLY OF THE ADJACENT SAID BOTTOM OPENINGS THEREIN FOR RECEPTION OF AIR THEREFROM AND PROVIDED WITH VERTICALLY EXTENDING OPENINGS FOR DISCHARGE OF AIR THEREFROM FACING ACROSS THE DOOR OPENING, (C) A BLOWER HOUSING WITHIN SAID AIR INTAKE AND DISTRIBUTION CHAMBER ADJACENT EACH END THEREOF AND OVERLYING THE BOTTOM OPENINGS THEREIN IN SPACED RELATION THERETO, SAID BLOWER HOUSING HAVING ITS SIDE AND TOP WALLS EXTENDED TO THE ADJACENT OUTER WALL OF SAID AIR INTAKE AND DISTRIBUTION DUCT AND DOWNWARDLY TOWARD SAID ADJACENT AIR DISTRIBUTION DUCTS, AND AXIALLY ALIGNED AIR INTAKE OPENINGS IN SAID BLOWER SAIDE WEALLS, (D) PASSAGEWAYS AT EACH SIDE OF THE BLOWER HOUSING ENCLOSING SAME AND EXTENDING DOWNWARDLY THEREFROM FOR COLLECTING AND DIRECTING AIR FROM SAID DISTRIBUTION CHAMBER BOTTOM OPENINGS TO SAID BLOWER HOUSING AXIALLY ALIGNED OPENINGS, (E) A PARTITION WALL EXTENDING LONGITUDINALLY WITHIN SAID BLOWR HOUSING DIVIDING IT INTO TWO CHAMBERS AND DEPENDING THEREON TO OVERLIE AND BISECT THE INLET OPENING OF THE ADJACENT INTERMEDIATE AIR DISTRIBUTION DUCT, (F) A ROTOR JOURNALED IN SAID BLOWER HOUSING PARTITION WALL IN AXIAL ALIGNMENT WITH SAID BLOWER HOUSING SIDE OPENING FOR WITHDRAWING AIR FROM SAID PASSAGEWAYS AT EACH SIDE OF SAID BLOWER HOUSING AND DISCHARGING SAME INTO SAID AIR DISTRIBUTION DUCTS, AND (G) A HEATING MEANS WITHIN ONE SAID PASSAGEWAY FOR HEATING INCOMING AIR BEFORE ENTERING THE BLOWER HOUSING AND DISCHARGED TO THE INLET OPENINGS OF THE VERTICALLY DISPOSED AIR DUCTS DISOPOSED AT ONE SIDE OF THE SAID BLOWER HOUSING PARTITION WALL.