Electromagnetic indicator

Claim 1

AN ELECTROMAGNETIC DECIMAL DISPLAY DEVICE COMPRISING A HOUSING HAVING A WINDOW, A STATOR DISPOSED WITHIN SAID HOUSING, SAID STATOR HAVING A FERROMAGNETIC ANNULAR CORE WITH A CIRCULAR ARRAY OF STATOR POLES, A WINDING ON EACH OF SAID POLES, THE ENERGIZATION OF ANY ONE OF SAID WINDINGS ESTABLISHING A MAGNETIC FIELD WHOSE VECTOR IS DIRECTED ALONG THE POLE CARRYING THE ENERGIZED WINDING, A ROTOR WITHIN SAID HOUSING, SAID ROTOR COMPRISING A SALIENT POLE MAGNET AND A CHARACTER-BEARING MEMBER CONNECTED TO ROTATE AS A UNIT, MEANS ROTATABLY MOUNTING SAID ROTOR WHEREBY WHEN ANY ONE OF SAID WINDINGS IS ENERGIZED SAID MAGNET WILL SWING TO A SELECTED POSITION IN ALIGNMENT WITH THE VECTOR OF THE MAGNET FIELD ESTABLISHED BY SAID ENERGIZED WINDING, SAID CHARACTER-BEARING MEMBER HAVING CHARACTERS SPACED IN ACCORDANCE WITH THE ANGULAR DISPLACEMENT OF THE VECTORS OF THE MAGNETIC FIELDS ESTABLISHED BY ENERGIZING SAID WINDINGS ONE BY ONE, SAID CHARACTERS DISPOSED SO THAT AT EACH OF SAID SELECTED POSITIONS OF SAID MAGNET A DIFFERENT SELECTED CHARACTER WILL BE DISPLAYED OFFCENTER IN SAID WINDOW, EACH POLE HAVING ITS INWARD END TERMINATING IN AN END FACE SLANTED RELATIVE TO ITS POLE AXIS SO THAT THE AIR GAP BETWEEN SAID MAGNET AND SAID SLANTED END FACE OF EACH POLE IS MINIMUM AT AN INDEX MAGNET POSITION DISPLACED ANGULARLY FROM THE SELECTED MAGNET POSITION ESTABLISHED BY ENERGIZING THE WINDING OF SAID POSITION ESTABLISHED BY ENERGIZING THE WINDING OF SAID EACH POLE, WHEREBY WHEN AN ENERGIZED WINDING IS SUDDENLY DEENERGIZED AND NO OTHER WINDING IS ENERGIZED THE MAGNET WILL SHIFT FROM A SELECTED POSITION TO A PREDETERMINED INDEX POSITION, SAID INDEX MAGNET POSITIONS BEING DISPLACED FROM SAID SELECTED MAGNET POSITIONS BY AMOUNTS SUFFICIENT FOR SAID SELECTED CHARACTERS TO BE CENTERED IN SAID WINDOW WHEN SAID MAGNET SHIFTS FROM SAID SELECTED MAGNET POSITIONS TO SAID INDEX MAGNET POSITIONS.