Electric motor having low curie point magnetic bridge between poles

Claim 1

A SYNCHRONOUS MOTOR, INCLUDING, A STATOR, AND A ROTOR CONCENTRIC WITH SAID STATOR FOR RUNNING AT A SYNCHRONOUS SPEED AND HAVING A PERMANENT MAGNET CENTRALLY LOCATED IN SAID ROTOR, A CYLINDRICAL MEMBER CONCENTRIC WITH SAID MAGNET AND IN CONTACT WITH SAID MAGNET, SAID CYLINDRICAL MEMBER BEING MADE OF A MAGNETIC MATERIAL HAVING A HIGH PERMEABILITY, AND DEFINING A PLURALITY OF RADIAL SLOTS, AND A BAR POSITIONED IN EACH OF THE RADIAL SLOTS OF SAID CYLINDRICAL MEMBER, SAID BAR BEING MADE OF A MATERIAL HAVING A CURIE POINT SUCH THAT THE TEMPERATURE OF THE ROTOR REACHES SAID CURIE POINT SIMULTANEOUSLY AS THE ROTOR SPEED APPROACHES SYNCHRONOUS SPEED DURING STARTING, SAID BARS WHEN BELOW SAID CURIE POINT BEING EFFECTIVE TO PROVIDE A LOW RELUCTANCE TO THE SLOTS TO THEREBY FORM A CONTINUOUS CYLINDRICAL PATH HAVING A LOW RELUCTANCE, SAID BARS WHEN ABOVE SID CURIE POINT BEING EFFECTIVE TO PROVIDE A HIGH RELUCTANCE IN THE SLOTS TO THEREBY DIVIDE THE CYLINDRICAL MEMBER INTO A PLURALITY OF MAGNETIC SEGMENTS AND CAUSE THE ROTOR TO RUN AT THE SYNCHRONOUS SPEED.