Portable hair dryers

Claim 1

A HAIR DRYER COMPRISING A CASING HAVING SPACED END WALLS, TOP AND BOTTOM WALLS INTERCONNECTING THE END WALLS, A CURVED REAR WALL MERGING INTO THE TOP AND BOTTOM WALLS OF A SIZE TO FIT BETWEEN THE THUMB AND FOREFINGER WHEN THE CASING IS GRAPSED IN THE HAND, THE END WALLS BEING FORMED WITH INLET OPENINGS AND THE CASING DEFINING A SLOT-LIKE OUTLET OPPOSITE THE REAR WALL AND EXTENDING OVER THE WIDTH OF THE CASING BETWEEN THE END WALLS, A COMMUTATOR-TYPE ELECTRIC MOTOR CENTRALLY LOCATED IN THE CASING ADJACENT THE REAR END AND HAVING A SHAFT PARALLEL THERETO, A PAIR OF CYLINDRICAL BLADED ROTORS OVERHUNG MOUNTED ON THE OPPOSITE ENDS OF THE MOTOR SHAFT AND EXTENDING BETWEEN THE MOTOR AND THE RESPECTIVE SIDE WALLS, AN OUTLET DUCT EXTENDING DIRECTLY FROM THE ROTOR TO SAID OUTLET WITH THE INTERIOR OF SAID BOTTOM WALL OF THE CASING FORMING A BOTTOM SIDE OF SAID OUTLET DUCT, AND ELECTRIC HEATER MEANS IN THE OUTLET DUCT; THE ROTORS ON ROTATION INDUCING FLOW INTO THE INLET OPENINGS, THROUGH THE ROTOR, THROUGH THE OUTLET DUCT PAST THE HEATER MEANS AND THENCE OUT OF THE OUTLET IN THE FORM OF A FLAT JET.