Fan

Claim 1

IN A LINE FLOW FAN, A PLURALITY OF PARALLEL ARCUATE BLADES IN A CYLINDRICAL ARRANGEMENT FORMING A ROTOR, A CONDUIT THROUGH WHICH AIR IS CONVEYED ENCOMPASSING THE ROTOR, THE CONDUIT INCLUDING A PAIR OF SIDE WALLS, EACH SIDE WALL HAVING A PAIR OF SLOTS THERETHROUGH, THE SLOTS EXTENDING SUBSTANTIALLY RADIALLY WITH RESPECT TO THE ROTOR AXIS AT OPPOSITE SIDES THEREOF AND FACING A MATCHING SLOT IN THE OTHER SIDE WALL, THE CONDUIT ALSO INCLUDING A PAIR OF BAFFLE ASSEMBLIES, EACH ASSEMBLY COMPRISING A PAIR OF FLAT ELONGATED STRIPS HINGED TO EACH OTHER ALONG ONE OF THE LONGITUDINAL EDGES OF EACH STRIP, A PAIR OF PINS, EACH PIN FORMING ONE OF THE HINGES, EACH END OF SAID PIN PASSING THROUGH ONE OF THE SLOTS TO PERMIT RADIAL SHIFTING EACH OF THE PINS ASSOCIATED WITH ONE BAFFLE ASSEMBLY SELECTIVELY TOWARD AND AWAY FROM THE ROTOR AXIS, A PAIR OF PEGS SECURED TO EACH OF THE STRIPS, A SLOT IN A SIDE WALL ASSOCIATED WITH EACH PEG, THE PEG SLIDABLY PROTRUDING INTO THE SLOT ASSOCIATED THEREWITH, WHEREBY FOUR PAIRS OF RETAINING MEMBERS COOPERATING WITH THE SIDE WALLS ARE FORMED WHICH PERMIT A PIVOTING MOVEMENT OF THE BAFFLE STRIPS AROUND AN AXIS SPACED FROM THE HINGE SO THAT EACH OF THE BAFFLE ASSEMBLIES IS ADAPTED TO ASSUME EITHER OF TWO POSITIONS CORRESPONDING TO FIRST AND SECOND POSITIONS OF THE PIN ENDS AT THE END OF THE SLOTS, WITH THE BAFFLE ASSEMBLIES BEING MAINTAINED IN A V-SHAPED CONFIGURATION IN EITHER OF THE POSITIONS, THE V-SHAPED BAFFLE ASSEMBLY