Miniature electric motor

Claim 1

A SMALL ELECTRIC MOTOR COMPRISING, IN COMBINATION, A SHAFT; A ROTOR SECURED TO SAID SHAFT AND IN THE FORM OF A CYLINDRICAL FERRO-MAGNETIC BODY HAVING A SUBSTANTIALLY SMOOTH AND AN UNINTERRUPTED CYLINDRICAL SURFACE WITHOUT GROOVES THEREIN; A DRUM WINDING ON SAID BODY IN AN ENGAGEMENT WITH SAID SUBSTANTIALLY UNINTERRUPTED CYLINDRICAL SURFACE AND SECURED AGAINST DISPLACEMENT CIRCUMFERENTIALLY OF SAID BODY; A STATOR SURROUNDING SAID ROTOR AND HAVING AT LEAST TWO DIAMETRICALLY OPPOSED POLES; AND A PAIR OF SUBSTANTIALLY CIRCULAR DISKS OF INSULATING MATERIAL HAVING A DIAMETER SUBSTANTIALLY EQUAL TO THAT OF SAID CYLINDRICAL BODY AND MOUNTED ON SAID SHAFT IN ENGAGEMENT WITH THE OPPOSITE ENDS OF SAID CYLINDRICAL BODY, EACH OF SAID DISKS HAVING FINGER-LIKE PROJECTIONS DIAMETRICALLY OPPOSITE TO EACH OTHER; SAID ROTOR WINDING COMPRISING A PLURALITY OF SEPARATE COILS EACH DISPOSED BETWEEN AND SEPARATED CIRCUMFERENTIALLY FROM EACH OTHER BY SAID PROJECTIONS; EACH OF SAID DISKS BEING PROVIDED ON ITS AXIALLY OUTER SURFACE WITH AN ANGULAR RECESS IN EACH SECTOR BETWEEN TWO ADJACENT PROJECTIONS, SAID RECESSES HAVING EDGES FOR SUPPORTING THE WINDINGS BETWEEN SAID PROJECTIONS.