Air-driven turbines

Claim 1

IN AN AIR DRIVEN TURBINE FOR POWERING A GRINDING SPINDLE: AN ELONGATED HOUSING HAVING A BORE THERETHROUGH AND A COUNTERBORE AT ONE END; AN ELONGATED BEARING SLEEVE WITHIN SAID BORE HAVING AN ANNULAR RADIAL FLANGE AT ONE END NESTED IN SAID COUNTERBORE DEFINING AN END AIR THRUST BEARING; A ROTOR LOOSELY JOURNALED IN SAID SLEEVE INCLUDING AN ANNULAR HEADPIECE JOURNALED IN SAID COUNTERBORE AND SPACED FROM SAID END THRUST BEARING; AN END PLATE ON SAID HOUSING CLOSING SAID COUNTERBORE AND SPACED FROM SAID HEADPIECE DEFINING A SECOND END THRUST BEARING; THERE BEING A PAIR OF SPACED EXTERIOR ANNULAR AIR SUPPLY RECESSES IN SAID SLEEVE WITH RADIAL AIR FEED HOLES COMMUNICATING WITH THE SLEEVE BORE; AND AXIAL AIR FEED HOLES THROUGH SAID BEARING FLANGE INTERCONNECTING AN AIR SUPPLY RECESS WITH SAID COUNTERBORE ON ONE SIDE OF SAID HEADPIECE; AN AXIAL COMPRESSED AIR INLET PORT IN SAID END PLATE COMMUNICATING WITH SAID COUNTERBORE UPON THE OTHER SIDE OF SAID HEADPIECE; THERE BEING A SERIES OF INTERCONNECTED RADIAL AND AXIAL PASSAGES IN SAID HOUSING AND END PLATE COMMUNICATING WITH SAID BEARING SLEEVE ANNULAR RECESSES; AND A REACTION PROPULSION MEANS IN SAID ROTOR HEADPIECE COMMUNICATING WITH SAID AIR INLET PORT, WITH JET OUTLETS COMMUNICATING WITH THE EXTERIOR OF SAID HOUSING; BY WHICH THE COMPRESSED AIR OPERATES THE PROPULSION MEANS WITH SOME AIR BEING BLED INTO THE BEARING SLEEVE BORE AND COUNTERBORE TO DEFINE AN AIR BEARING FILM AND AN END THRUST BEARING FILM FOR SAID ROTOR.