Alternating current generators

Claim 1

A SOLID ROTOR FOR A HIGH SPEED ELECTRIC ALTERNATOR, COMPRISING FIRSTLY A FERROMAGNETIC ELEMENT HAVING AT THE MIDDLE PORTION OF ITS LENGTH AT LEAST ONE RADIAL POLE PROJECTION, A SOLID CYLINDRICAL PORTION ONE EACH SIDE OF SAID MIDDLE PORTION, A FURTHER PORTION IN THE FORM OF A SOLID OF REVOLUTION BEYOND EACH OF SAID CYLINDRICAL PORTIONS, AND A BEARING TRUNNION AT EACH END; AND SECONDLY A YORK COMPRISING TWO ENANTIOMORPHIC FERROMAGNETIC RING ELEMENTS EACH HAVING AT LEAST ONE RECESS TO ACCOMMODATE ONE HALF OF SAID RADIAL POLE PROJECTION AND, TO SURROUND ONE OF SAID SOLID CYLINDRICAL PORTIONS, A CONTINUOUS END HAVING AN EXTERNAL PERIPHERY WITH A REDUCING TAPER OUTWARDLY FROM SAID RECESS, THE TWO YOKE ELEMENTS BEING SECURED TOGETHER AT THE MEDIAN PLANE WHERE THEY ABUT EACH OTHER BY THE PERIPHERAL SURFACE EXTENDING BETWEEN THE CIRCUMFERENTIAL LIMITS OF THE REGISTERING RECESSES IN THE TWO YORK ELEMENTS; SAID THREE ELEMENTS JOINTLY AFFORDING A CONTINUOUS GAP BETWEEN THEIR OPPOSED INTERNAL SURFACES, WHICH GAP IS TRANSVERSE TO THE AXIS AT EACH END OF SAID POLE PROJECTION PARALLEL TO THE AXIS AT EACH SIDE OF SAID POLE PROJECTION AND OTHERWISE CIRCUMFERENTIAL; AND A NON-MAGNETIC MATERIAL WITH WHICH SAID GAP IS FILLED TO BOND THE FERROMAGNETIC ELEMENTS TOGETHER AS A UNITARY ROTOR.