Rotatable elongated air diffuser construction

Claim 1

A HORIZONTAL AXIS PARALLEL RIBBON JET BARREL-TYPE AIR DIFFUSER COMPRISING A RECTANGULAR FRAME FOR MOUNTING AGAINST THE PERIPHERY OF A RECTANGULAR WALL OPENING HAVING ELONGATED HORIZONTAL SIDE MEMBERS AND SHORT CONNECTING END MEMBERS, AND L-SHAPED JUNCTION ELEMENTS CONNECTING THE ENDS OF SAID SIDE AND END MEMBERS AT THE CORNERS OF THE FRAME TO HOLD SAID FRAME TOGETHER, AND A ROTATABLE ELONGATED CYLINDRICAL BARREL PIVOTALLY MOUNTED THEREWITHIN, PIVOTAL MOUNTS AT THE ENDS OF SAID BARREL ON SAID END MEMBERS AND HAVING PARTIAL CYLINDRICAL OUTSIDE BEARING WALLS, SAID BEARING WALLS FORMING THE OUTSIDE OF SAID BARREL AND CONTACTING AND BEARING AGAINST THE INSIDE EDGES OF SAID SIDE MEMBERS AND FLAT PARALLEL INSIDE VANE CARRYING WALLS, SAID CARRYING WALLS CONSISTING OF A CENTRAL WALL EXTENDING ALONG AND BEING POSITIONED IN THE HORIZONTAL AXIS OF THE ROTATABLE BARREL AND TWO OUTSIDE WALLS SPACED ON EACH SIDE OF SAID CENTRAL WALL AND CREATING SEPARATE PARALLEL CHANNELS THROUGH WHICH THE AIR MAY BE PROJECTED IN A SERIES OF JETS IN THE SAME OR OPPOSITE DIRECTIONS ON OPPOSITE SIDES OF SAID CENTRAL WALL, SAID WALLS EXTENDING THE FULL LENGTH OF SAID BARREL PAR-