End structure for dynamoelectric machine

Claim 1

A VENTILATING END STRUCTURE FOR GENERATORS DESIGNED FOR USE ON AIRCRAFT AND COOLED BY A HIGH VELOCITY AIR STREAM PASSING THROUGH THE GENERATOR, THE GENERATOR HAVING A SHAFT ADAPTED TO BE DRIVEN BY A PRIME MOVER AT ONE END, A ROTATING ELECTRIC CIRCUIT ON THE SHAFT, A HOUSING MEMBER HAVING A STATIONARY ELECTRICAL CIRCUIT THEREON, A COLLECTOR ASSEMBLY INCLUDING BRUSH HOLDERS AND BRUSHES AT THE OTHER END OF THE SHAFT ELECTRICALLY CONNECTED TO THE ROTATING ELECTRIC CIRCUIT, SAID VENTILATING END STRUCTURE COMPRISING AN AIR BLAST COVER REMOVABLY MOUNTED ON THE COLLECTOR END OF THE HOUSING, SAID COVER HAVING A NOZZLE PORTION DEFINING AN AIR STREAM ADMITTING OPENING AND FLARING INTO A LARGER DIAMETER PORTION, AIR FLOW BAFFLING MEANS SUPPORTED AND SPACED FROM THE INTERIOR OF THE LARGE DIAMETER PORTION OF SAID COVER AND FORMING WITH SAID COVER AN ANNULAR PASSAGE FOR FLOW OF THE AIR STREAM AROUND SAID COLLECTOR ASSEMBLY, AIR FLOW DIRECTING MEANS MOUNTED WITHIN SAID COVER ADJACENT SAID OPENING TO SHIELD SAID COLLECTOR ASSEMBLY FROM IMPINGING AIR FLOW AND MOISTURE INTRODUCED INTO SAID OPENING, SAID BAFFLING MEANS BEING ARRANGED TO DIRECT THE AIR STREAM OVER THE ELECTRICAL CIRCUITS OF THE GENERATOR AND TO COOPERATE WITH SAID AIR DIRECTING MEANS TO FORM A SHROUD ABOUT SAID COLLECTOR ASSEMBLY TO PREVENT GOOD HEAT EXCHANGE RELATIONSHIP BETWEEN THE COOLING AIR STREAM AND SAID COLLECTOR ASSEMBLY.