Starting circuit for brushless direct current motor

Claim 1

IN A BRUSHLESS D.C. MOTOR HAVING INPUT TERMINALS FOR THE CONNECTION OF D.C. POWER FOR ENERGIZING SAID MOTOR, A TORQUE PRODUCING UNIT AND A STATIC SWITCHING MEANS; SAID UNIT INCLUDING A STATIONARY ARMATURE AND A PERMANENT MAGNET ROTOR MOUNTED IN MAGNETIC COUPLING RELATIONSHIP; SAID ARMATURE INCLUDING MAIN WINDING MEANS HAVING A PLURALITY OF TAPS BETWEEN WHICH CURRENT FLOWS THROUGH SAID MAIN WINDING MEANS; SAID STATIC SWITCHING MEANS INCLUDING A RADIATION SOURCE, UNIDIRECTIONAL CURRENT CARRYING SWITCHING SECTIONS INTERPOSED BETWEEN SAID TAPS AND SAID INPUT TERMINALS, DEVICES RESPONSIVE TO RADIATION GENERATED BY SAID RADIATION SOURCE UPON ENERGIZATION THEREOF, SAID DEVICES CONNECTED IN CIRCUIT WITH SAID SWITCHING SECTIONS WHEREBY IMPINGEMENT OF RADIATION FROM SAID RADIATION SOURCE UPON PREDETERMINED ELEMENTS OPERATES PREDETERMINED SWITCHING SECTIONS FROM HIGH TO LOW IMPEDANCE STATES, AND MEANS MOUNTED TO SAID ROTOR AND PHYSICALLY SPACED FROM SAID DEVICES FOR ANY GIVEN ANGULAR RADIATION GENERATED BY SAID RADIATION SOURCE TO IMPINGE UPON AT LEAST ONE OF SAID DEVICES FOR ANY GIVEN ANGULAR POSITION OF SAID ROTOR WHEREBY PORTIONS OF SAID STATIC SWITCHING MEANS CONNECTED TO DIFFERENT ONE OF SAID TAPS PROVIDE PORTIONS OF A COMPLETE UNIDIRECTIONAL CURRENT PATH BETWEEN SAID INPUT TERMINALS AND THROUGH SAID MAIN WINDING MEANS; THE IMPROVEMENT COMPRISING A STARTING MEANS FOR SAID RADIATION SOURCE; AND RADIATION SOURCE AND SAID MAIN WINDING MEANS CONNECTED IN ELECTRICAL SERIES BETWEEN SAID TERMINALS, SAID STARTING MEANS INCLUDING A FIRST AND A SECOND SECTION; SAID FIRST SECTION PROVIDING A RELATIVELY LOW IMPEDANCE CURRENT PATH THROUGH WHICH SAID RADIATION SOURCE IS CONNECTED TO SAID TERMINALS AND ENERGIZED UPON THE APPLICATION OF D.C. POWER TO SAID TERMINALS EVEN PRIOR TO IMPINGEMENT OF SAID RADIATION UPON ANY OF SAID DEVICES; AND SAID SECOND SECTION CONNECTED TO SAID FIRST SECTION FOR OPERATION THEREOF TO A RELATIVELY HIGH IMPEDANCE STATE WHILE SAID TORQUE PRODUCING UNIT IS IN OPERATION.