Combination air warming and centrifugal fan unit for transmitting heated air

Claim 1

IN A DEVICE OF THE CLASS DESCRIBED, A DRUM HAVING OPEN FORWARD AND REARWARD ENDS, AN ENCLOSED MOTOR HOUSING, MEANS FOR SECURING SAID MOTOR HOUSING WITHIN SAID DRUM, OPENINGS IN THE SIDES OF SAID DRUM AND SAID HOUSING, A PIPE CONNECTING THE OPENINGS OF SAID DRUM AND SAID HOUSING SO THAT SAID HOUSING CAN COMMUNICATE WITH THE AIR OUTSIDE SAID DRUM, A POWER SHAFT COAXIALLY POSITIONED IN SAID DRUM AND EXTENDING FORWARDLY FROM SAID HOUSING, A PLATE RIGIDLY SECURED TO SAID SHAFT AND IN SPACED RELATION TO SAID HOUSING, FIRST BLADES ON THE FORWARD SIDE OF SAID PLATE WHEREBY AIR WILL BE DRAWN INTO THE FORWARD END OF SAID DRUM AND TO THE PERIPHERY OF SAID PLATE UPON THE ROTATION OF SAID SHAFT, OPENINGS IN SAID HOUSING ADJACENT SAID SHAFT, BLADES ON THE REARWARD SIDE OF SAID PLATE ADJACENT SAID OPENINGS IN SAID HOUSING WHEREBY AIR WILL BE PULLED FROM SAID HOUSING UPON THE ROTATION OF SAID SHAFT, A COWLING ON THE FORWARD END OF SAID DRUM AND HAVING ITS CENTER PORTION EXTENDING INWARDLY AND REARWARDLY, THE CENTER PORTION OF SAID COWLING TERMINATING IN AN OPENING ADJACENT SAID FIRST BLADES, THE FORWARD END PORTION OF SAID DRUM BEING SPACED OUTWARDLY FROM THE INWARDLY AND REARWARDLY EXTENDING CENTER PORTION OF SAID COWLING TO FORM AN ANNULAR SPACE, THE OUTER PERIMETER OF SAID PLATE BEING SPACED FROM THE INSIDE WALL OF SAID DRUM TO FORM A SPACE IN DIRECT COMMUNICATION WITH THE OUTER PERIMETER OF SAID ANNULAR SPACE WHEREBY AIR CAN BE BOTH DELIVERED TO AND RETRIEVED FROM SAID ANNULAR SPACE BY THE SUPPLY OF AIR BEING DELIVERED TO THE SPACE AROUND SAID PLATE, AN AIR HEATING BURNER ELEMENT MOUNTED WITHIN SAID ANNULAR SPACE, AND MEANS IN SAID HOUSING FOR ROTATING SAID SHAFT.