Fans

Claim 1

A FAN COMPRISING A MOTOR, A BLADED CYLINDRICAL ROTOR COAXIAL WITH AND DIRECTLY DRIVEN BY THE MOTOR IN ONE DIRECTION, MEANS FOR CLOSING BOTH ENDS OF THE ROTOR AND GUIDE MEANS EXTERNAL TO THE ROTOR INCLUDING END WALLS EXTENDING GENERALLY IN THE PLANES OF THE ENDS OF THE ROTOR AND A PAIR OF GUIDE WALLS EXTENDING BETWEEN THE END WALLS AND DEFINING AN ENTRY REGION AND A DISCHARGE REGION, SAID GUIDE WALLS COOPERATING WITH THE ROTOR WHEN ROTATED BY SAID MOTOR TO INDUCE A FLOW OF AIR FROM THE ENTRY REGION THROUGH THE PATH OF THE ROTATING BLADES TO THE INTERIOR OF THE ROTOR AND THENCE AGAIN THROUGH THE PATH OF THE ROTATING BLADES TO THE DISCHARGE REGION, AN ELECTRIC HEATING ELEMENT MOUNTED WITHIN THE ROTOR; SAID ROTOR BEING MOUNTED ON BEARINGS AT EITHER END, AND SUPPORT MEANS BEING PROVIDED FOR THE HEATING ELEMENT WHICH COMPRISE A STATIONARY MEMBER EXTENDING AXIALLY OF THE ROTOR THROUGH THE MOTOR AND THROUGH SAID ROTOR BEARINGS AND FORMING AT LEAST ONE ELECTRICAL CONNECTION TO THE ELEMENT.