Stator for electric motors

Claim 1

IN AN ELECTRIC MOTOR HAVING A ROTOR AND A STATOR, A STATOR STRUCTURE COMPRISING, A PAIR OF MATING SOLID ANNULAR RINGS OF SINTERED FERROMAGNETIC METALLIC MATERIAL EXHIBITING HIGH ELECTRICAL RESISTIVITY, SAID RINGS BEING SUBSTANTIALLY SIMILAR IN CONFIGURATION, EACH HAVING A RADIAL THICKNESS AND AXIAL LENGTH RELATIVELY SMALL WITH RESPECT TO ITS OUTER DIAMETER, AT LEAST ONE WEB PORTION FORMED INTEGRALLY WITH EACH OF SAID RINGS AND EXTENDING RADIALLY INWARD THEREOF ALONG AT LEAST A PART OF ITS ARCUATE LENGTH, EACH SAID WEB PORTION TERMINATING AT ITS INNER EXTREMITY WITH AN INTEGRAL, ARCUATELY FORMED POLE SECTION CONCENTRIC WITH ITS ASSOCIATED RING AND EXTENDING AXIALLY THEREOF FOR A DISTANCE AT LEAST AS GREAT AS THE AXIAL LENGTH, THE ROTOR TO BE SUPPORTED SUBSTANTIALLY CONCENTRICALLY BETWEEN THE INNER ARCUATE CURVED SURFACES OF SAID POLE SECTIONS, A PORTION OF EACH OF SAID INNER CURVED SURFACES OF SAID POLE SECTIONS ADJACENT ONE EDGE THEREOF HAVING A GREATER RADIUS THAN THE REMAINDER TO THEREBY PRESENT A STEP POLE FACE TO SAID ROTOR, SAID POLE SECTIONS AND SAID RINGS DEFINING A PLURALITY OF ARCUATE CHANNELS CONCENTRIC WITH SAID RINGS FOR RECEIVING A FIELD COIL, A SLOT PROVIDED IN AT LEAST ONE OF SAID POLE SECTIONS AND ASSOCIATED WEBS ON EACH RING, SAID SLOT BEING RELATIVELY CLOSER TO ONE EDGE OF SAID POLE SECTION THAN THE OTHER, A SINGLE CLOSED LOOP CONDUCTOR COIL DISPOSED IN SAID SLOT AND SURROUNDING THE SMALL PORTION OF THE WEB DEFINE THEREBY, AND MEANS TO MAINTAIN SAID RINGS IN A COAXIAL ABUTTING RELATIONSHIP INCLUDING A SNAP RING MEMBER IN ENGAGEMENT WITH EACH OF SAID ANNULAR RINGS.