Ventilating system for dynamoelectric machines

Claim 1

IN A FAN-COOLED DYNAMOELECTRIC MACHINE INCLUDING A STATOR CORE HAVING WINDINGS THEREON AND HAVING A TUBULAR STATOR FRAME, AN END BRACKET INCLUDING AN AIR INLET OPENING AND AN AIR DISCHARGE OPENING AND A ROTATABLE SHAFT HAVING A ROTOR CORE AND ROTOR WINDINGS THEREON EXTENDING THROUGH A CENTRAL OPENING IN SAID END BRACKET; A VENTILATING SYSTEM COMPRISING A HEAT EXCHANGER SECURED INTERMEDIATE SAID END BRACKET AND SAID SHAFT FRAME AND ENCLOSING SAID TUBULAR FRAME AT ITS END, SAID HEAT EXCHANGER HAVING RADIALLY EXTENDING, HEAT ABSORBING FINS ON ITS INNER SURFACE AND HEAT RADIATING MEANS ON ITS OUTER SURFACE, A FIRST FAN BLADE SECURED ON SAID SHAFT INTERMEDIATE SAID END BRACKET AND SAID HEAT EXCHANGER, A SECOND FAN BLADE SECURED ON SAID SHAFT WITHIN SAID STATOR FRAME EXTERIORLY OF SAID STATOR WINDINGS ADJACENT SAID HEAT EXCHANGER, ANNULAR BAFFLE MEANS CLOSELY ADJACENT BUT SPACED FROM THE PERIPHERY OF THE INTERIOR OF SAID STATOR FRAME AND INTERMEDIATE SAID STATOR WINDINGS AND SAID SECOND FAN BLADE FOR DIRECTING INTERIOR AIR IN SAID MACHINE TOWARD SAID HEAT EXCHANGER AND RADIALLY INWARD, AND AN ANNULAR BAFFLE SECURED WITHIN SAID END BRACKET AND EXTENDING RADIALLY INWARD FOR DIRECTING EXTERIOR AIR FROM SAID AIR INLET OPENING TOWARD SAID HEAT EXCHANGER AND RADIALLY OUTWARD TOWARD SAID DISCHARGE OPENING, WHEREBY A COUNTERFLOW HEAT EXCHANGE SYSTEM IS ESTABLISHED.