Brushless d. c. motor

Claim 1

A BRUSHLESS D.C. MOTOR COMPRISING, IN COMBINATION, A MOTOR HOUSING HAVING AN ELONGATED HOLLOW CYLINDRICAL PORTION AND TWO END PLATES MOUNTED ON OPPOSITE ENDS OF SAID CYLINDRICAL PORTION ANS SUBSTANTIALLY CLOSING SAME, BEARING MEANS MOUNTED IN SAID END PLATES, AN ELONGATED ROTOR INCLUDING AN ELONGATED CYLINDRICAL PERMANENT MAGNET COAXIALLY POSITIONED WITHIN SAID CYLINDRICAL PORTION OF SAID HOUSING AND SHAFT MEANS CONNECTED TO THE ENDS OF SAID MAGNET AND HAVING END PORTIONS THEREOF ROTATABLY MOUNTED IN SAID BEARING MEANS IN SAID END PLATES, A STATIONARY ARMATURE POSITIONED WITHIN SAID CYLINDRICAL PORTION OF SAID HOUSING AND SURROUNDING SAID PERMANENT MAGNET WITH SAID ARMATURE INCLUDING FOUR SPACED SUPPORTS WITH EACH OF SAID SUPPORTS EXTENDING LONGITUDINALLY IN SAID HOUSING AND BEING SPACED A QUADRANT APART FROM ADJACENT ONES OF SAID SUPPORTS, SAID ARMATURE FURTHER INCLUDING FOUR SEPARATE ELECTRICAL CONDUCTORS WITH EACH OF SAID CONDUCTORS BEING WOUND ON TWO OPPOSITE ONES OF SAID SUPPORTS AND WITH EACH WINDING OF EACH OF SAID CONDUCTORS BEING THE REVERSE OF THE OTHER WINDING THEREOF, AND CONTACTOR MEANS INCLUDING A COMMON CONTACT AND FOUR SPACED INDIVIDUAL CONTACTS WITH EACH OF SAID INDIVIDUAL CONTACTS BEING ELECTRICALLY CONNECTED TO ONE END OF EACH OF SAID CONDUCTORS WITH SAID COMMON CONTACT AND THE OTHER END OF EACH OF SAID CONDUCTORS BEING ELECTRICALLY CONNECTIBLE TO A SOURCE OF D.C. VOLTAGE, AND A QUANTITY OF POWDERED CONDUCTIVE MAGNETIC MATERIAL POSITONED IN SAID HOUSING AND IN CONTACT WITH SAID COMMON CONTACT AND NORMALLY IN SPACED RELATION TO EACH OF SAID INDIVIDUAL CONTACTS, SAID POWDERED MATERIAL BEING POSITIONED SO THAT WHEN IN A MAGNETIC FIELD IT PROVIDES A PATH FOR ELECTRICAL ENERGY BETWEEN SAID COMMON AND INDIVIDUAL CONTACTS, SAID CONTACTOR MEANS BEING MOUNTED IN SAID HOUSING AND HAVING MAGNETIC MEANS OPERATIVELY CONNECTED TO SAID SHAFT, SAID MAGNETIC MEANS BEING MOVABLE ADJACENT SAID CONTACTS AND BEING OPERABLE TO ALTERNATELY CLOSE SAID INDIVIDUAL CONTACTS AND SAID COMMON CONTACT TO THEREBY PROVIDE D.C. VOLTAGE TO SAID CONDUCTORS IN SEQUENCE SO THAT D.C. VOLTAGE PASSING THROUGH SAID WINDINGS CREATES A ROTATING MAGNETIC FIELD ABOUT SAID PERMANENT MAGNET OF SAID ROTOR TO THEREBY CAUSE ROTATION OF SAID PERMANENT MAGNET AND SAID SHAFT MEANS.