Electric motors of asynchronous or eddy-current

Claim 1

A HIGH-SPEED LOW-INERTIA MOTOR COMPRISING A HOUSING; MAGNETIC STRUCTURE MOUNTED IN SAID HOUSING AND DEFINING A GENERALLY CYLINDRICAL ANNULAR AIRGAP; WINDING MEANS CREATING A RADIAL ROTATING FIELD IN SAID AIRGAP; A TUBULAR SHAFT MADE OF LIGHTWEIGHT ELECTRICALLY-CONDUCTIVE NON-MAGNETIC MATERIAL JOURNALLED IN A RECESS OF SAID HOUSING AND DEFINING A RADIAL CLEARANCE SPACE BETWEEN THE OUTER SURFACE OF SAID SHAFT AND THE INNER SURFACE OF THE RECESS; A GENERALLY CYLINDRICAL ANNULAR EXTENSION PROJECTING FROM ONE END OF SAID TUBULAR SHAFT INTO SAID AIRGAP FOR ROTATION BY SAID ROTATING FIELD; AND MEANS CONNECTED WITH A SOURCE OF PRESSURE GAS AND COMMUNICATING WITH SAID CLEARANCE SPACE TO DISCHARGE SAID GAS THEREINTO TO FLOAT THE SHAFT IN THE RECESS; SAID RECESS COMMUNICATING WITH SAID AIRGAP WHEREBY SAID GAS WILL ISSUE FROM SAID CLEARANCE SPACE AND FLOW AROUND SAID ANNULAR EXTENSION AND INTO THE TUBULAR RECESS OF SAID SHAFT AND THENCE TO THE EXTERIOR FOR COOLING THE MOTOR.