Multi-speed induction type motor

Claim 1

IN A SINGLE PHASE INDUCTION TYPE MOTOR FOR OPERATION SELECTIVELY AT MULTI-SPEED, A MAGNETIC CORE HAVING A PLURALITY OF SLOTS CARRYING AT LEAST TWO MAIN WINDINGS; A FIRST MAIN WINDING POSITIONED IN SAID SLOTS TO FORM AT LEAST TWO PRIMARY MAGNETIC RUNNING POLES FOR OPERATING THE MOTOR AT ONE SPEED; EACH OF SAID POLES COMPRISING A PLURALITY OF COILS; A SECOND MAIN WINDING HAVING A PLURALITY OF COILS POSITIONED IN SAID SLOTS; MEANS CONNECTING AT LEAST A PART OF THE COILS OF ONE PRIMARY POLE OF SAID FIRST WINDING IN SERIES RELATION WITH SAID SECOND WINDING FOR ENERGIZATION THEREWITH; SAID LAST-MENTIONED COILS OF SAID ONE POLE BEING LOCATED IN THE SAME SLOTS OF THE CORE AS COILS OF SAID SECOND MAIN WINDING AND BEING ARRANGED IN ADDITIVE MAGNETIC RELATION THEREWITH TO PRODUCE AUGMENTING M.M.F.''S WHEN SAID SECOND WINDING IS ENERGIZED; SAID ADDITIVE SERIALLY CONNECTED COILS OF BOTH WINDINGS, TOGETHER WITH THE REMAINING COILS OF SAID SECOND WINDING, DEFINING AN EVEN NUMBER OF PRIMARY RUNNING POLES IN EXCESS OF THE NUMBER OF THE FIRST WINDING POLES FOR OPERATING THE MOTOR AT A SECOND SPEED, WITH THE RUNNING POLES FOR EACH SPEED OF OPERATION BEING GENERALLY SYMMETRICAL ELECTROMAGNETICALLY.