Bearing shunt

Claim 1

AN ELECTRODYNAMIC DEVICE COMPRISING IN COMBINATION A STATOR, A ROTOR, AN ELECTRICAL EXCITING WINDING CARRIED BY ONE OF THE FOREGOING MEMBERS, A SHAFT COMPOSED OF FERROMAGNETIC MATERIAL, SAID SHAFT CARRYING SAID ROTOR AND SAID WINDING ENCIRCLING THE SHAFT WITH A MAGNETIC AXIS PARALLEL TO THE SHAFT WHEREBY LINES OF MAGNETIC FLUX ARE GENERATED HAVING A PORTION OF THEIR PATH THROUGH OR PARALLEL TO THE SHAFT, END BELL MEANS COMPOSED OF FERROMAGNETIC MATERIAL SECURED TO THE STATOR AND CARRYING BEARING SUPPORTS, BEARING MEANS OF THE ROLLING ELEMENT TYPE INTERPOSED BETWEEN THE SHAFT AND THE BEARING SUPPORT FOR ROTATABLY SUPPORTING THE SHAFT, THE STATOR AND ROTOR BEING SO FORMED AS TO HAVE SURFACES SPACED FROM EACH OTHER LEAVING AN AIR GAP RESULTING IN TENDENCY FOR LEAKAGE FLUX TO PASS THROUGH THE END BELL MEANS AND THE SHAFT, A NONMAGNETIC METALLIC LINER INTERPOSED BETWEEN THE BEARING MEANS AND ONE OF THE P AIR OF ELEMENTS CONSISTING OF THE BEARING SUPPORT AND THE SHAFT, AND A PAIR OF RELATIVELY ROTATABLE MAGNETIZABLE MEMBERS WITH A PLURALITY OF INTELEAVED SURFACES IN CLOSE PROXIMITY TO EACH OTHER TO PROVIDE A SHORT AIR GAP OF LARGE CROSS SECTION, ONE MEMBER CONTACTING THE END BELL MEANS, THE OTHER CONTACTING THE SHAFT FOR PROVIDING A SHUNT PATH FOR MAGNETIC FLUX AROUND SAID BEARING MEANS.