Cooling means for dynamoelectric machines

Claim 1

FOR USE WITH A REFRIGERATION SYSTEM INCLUDING A MULTISTAGE COMPRESSOR COUPLED TO A CONDENSER TO DELIVER COMPRESSED REFRIGERANT GASES THERETO, AN ECONOMIZER COUPLED TO THE CONDENSER TO RECEIVE LIQUID REFRIGERANT THEREFROM, AN EVAPORATOR COUPLED TO THE ECONOMIZER TO RECEIVE LIQUID REFRIGERANT THEREFROM, FLOW CONTROL MEANS BETWEEN THE EVAPORATOR AND ECONOMIZER TO MAINTAIN A PREDETERMINED LIQUID LEVEL IN THE ECONOMIZER, A VENT CONDUIT EXTENDING FROM THE ECONOMIZER AT A POINT ABOVE THE LIQUID LEVEL THEREIN AND COUPLED TO AN INTERMEDIATE STAGE OF THE COMPRESSOR TO DELIVER REFRIGERANT GASES THERETO, SAID REFRIGERATION SYSTEM HAVING A HIGH PRESSURE CONDENSER SIDE, AN INTERMEDIATE PRESSURE ECONOMIZER SIDE AND A LOW PRESSURE EVAPORATOR SIDE, THE IMPROVEMENT OF AN ELECTRIC MACHINE HAVING A ROTOR AND STATOR SEPARATED BY AN ANNULAR GAP AND PROVIDED WITHA SEALED CASING, FIRST CONDUIT CONNECTED AT ONE END TO SAID CASING AND AT THE OTHER END TO THE HIGH PRESSURE CONDENSER SIDE FOR INTRODUCING LIQUID REFRIGERANT INTO DIRECT CONTACT WITH THE HEAT-PRODUCING PARTS OF THE MACHINE AND A SECOND CONDUIT FOR EXHAUSTING THE REFRIGERANT FROM CONTACTING RELATION WITH THE MACHINE, SAID SECOND CONDUIT CONNECTED AT ONE END TO SAID CASING AND AT THE OTHER END TOI THE INTERMEDIATE PRESSURE ECONOMIZER SIDE.