Hall effect rotating device

Claim 1

A RESOLVER FOR TRANSLATING INTO ELECTRICAL SIGNALS, THE COSINE AND THE SINE OF AN ANGLE, SAID ANGLE BEING SIMULATED BY THE RELATIVE POSITION OF A ROTOR AND A STATOR, COMPRISING: A STATOR HAVING FOUR IDENTICAL SHELLS, TWO PAIRS OF DIAMETRALLY OPPOSED AIR GAPS SEPARATING RESPECTIVELY SAID FOUR SHELLS FROM EACH OTHER, THE DIAMETER ALONG WHICH ONE PAIR IS SITUATED BEING PERPENDICULAR TO THAT ALONG WHICH THE OTHER PAIR IS SITUATED; FOUR HALL PROBES, RESPECTIVELY DISPOSED IN SAID FOUR AIR GAPS WITH THEIR MAJOR PLANAR SURFACES PARALLEL TO SAID RESPECTIVE DIAMETERS PASSING THROUGH SAID AIR GAPS; SAID STATOR HAVING AN AXIS OF REVOLUTION; A ROTOR ROTATABLY MOUNTED ABOUT SAID AXIS OF REVOLUTION AND WITHIN SAID STATOR; SAID ROTOR COMPRISING A PERMANENT MAGNET AND TWO POLE PIECES MADE OF A SOFT MAGNETIC MATERIAL, HAVING IDENTICAL SHAPE AND SIZE, AND FORMING WITH SAID SHELLS RESPECTIVE AIR GAPS RADIALLY INCREASING WITH THE DISTANCE TO THE VERTEX OF SAID POLE PIECES INCREASING, FOR THE PEAKS OF SAID POLE PIECES TO BE ROUNDED NEAR THE EDGES OF SAID MAGNET; MEANS FOR APPLYING A CONSTANT CURRENT TO SAID HALL PROBES; AND MEANS FOR COLLECTING AT SAID PROBES TAKEN BY PAIRS RESPECTIVE OUTPUT VOLTAGES PROPORTIONAL TO THE SINE AND THE COSINE OF THE ANGLE OF ROTATION OF SAID ROTOR.