Air diffuser

Claim 1

AN AIR DIFFUSER FOR DISCHARGING AIR THROUGH A NARROW ELONGATED OPENING IN A CEILING OF A ROOM OR OTHER ENCLOSURE, SAID DIFFUSER COMPRISING ELONGATED OPPOSING SIDE WALLS AND SHORT CONNECTING END WALLS ONE OF WHICH WALLS HAS AN OPENING THEREIN CONNECTIBLE WITH AN AIR SUPPLY DUCT AND EACH OF WHICH SIDE WALLS IS ADAPTED TO BE ENTERED VERTICALLY IN A NARROW ELONGATED CEILING OPENING SO THAT ITS LOWER EDGE LIES SUBSTANTIALLY IN THE PLANE OF THE LOWER SURFACE OF THE CEILING, A TOP WALL CONNECTED WITH SAID SIDE AND END WALLS AND COOPERATING THEREWITH TO DEFINE A DOWNWARDLY OPEN AIR CHAMBER, AND A SUBSTANTIALLY HORIZONTAL AIR DEFLECTING FLANGE EXTENDING ALONG AND PROJECTING FROM THE INNER SURFACE OF ONE OF SAID SIDE WALLS AT ITS LOWER EDGE AND COOPERATING WITH THE LOWER EDGE PORTION OF THE OPPOSITE SIDE WALL AND WITH THE LOWER EDGES OF THE END WALLS TO DEFINE A NARROW ELONGATED AND DOWNWARDLY OPEN AIR DISCHARGE SLOT COMMUNICATING WITH SAID AIR CHAMBER, A LONGITUDINALLY EXTENDING PORTION OF SAID OPPOSITE SIDE WALL SPACED UPWARDLY FROM SAID AIR DEFLECTING FLANGE BEING FORMED TO PROJECT INWARDLY AND TOWARD SAID FLANGE, SAID PROJECTING LONGITUDINAL SIDE WALL PORTION AND THE UPPER SURFACE OF SAID AIR DEFLECTING FLANGE SERVING COOPERATIVELY TO EFFECT AIR DISCHARGE FROM SAID SLOT IN A DIRECTION SUBSTANTIALLY PARALLEL WITH THE CEILING AND IN A WIDE FLAT STREAM CLOSELY ADJACENT THE LOWER SURFACE OF THE CEILING.