Linear motion, signal-producing, magnetic transducer

Claim 1

A LINEAR MOTION TRANSDUCER COMPRISING, IN COMBINATION, A CYLINDRICAL MAGNETIC CORE STRUCTURE DEFINING THEREIN A PAIR OF AXIALLY-SPACED TOROIDAL FLUX PATHS CLOSED WITH A COMMON ANNULAR AIR GAP, SAID CORE STRUCTURE FURTHER DEFINING A PAIR OF ANNULAR COIL SLOTS EACH POSITIONED WITHIN ONE OF SAID CLOSED TOROIDAL FLUX PATHS AND A STATIONARY RETURN LEG INTERIOR TO SAID AIR GAP, PRIMARY COIL MEANS ARRANGED FOR ENERGIZATION TO ESTABLISH FLOWS OF MAGNETIC FLUX WITHIN SAID PATHS IN AIDING RELATION ACROSS SAID AIR GAP, A PAIR OF SECONDARY COILS EACH LYING IN ONE OF SAID COIL SLOTS AND CONNECTED IN SERIES-OPPOSED RELATION FOR GENERATING OUTPUT VOLTAGES, AND A NON-MAGNETIC CONDUCTIVE RING ARMATURE ARRANGED IN SAID AIR GAP AND EXTERIOR TO SAID RETURN LEG AND EXTENDING NORMALLY TO THE MAJOR AXIS OF SAID CORE STRUCTURE, AN ARMATURE-POSITIONING SHAFT POSITIONED EXTERIOR TO SAID FLUX PATHS, AND MEANS FOR CONNECTING SAID ARMATURE-POSITIONING SHAFT TO SAID RING ARMATURE FOR MOVEMENT THEREWITH, SAID RING ARMATURE BEING MOVABLE WITH SAID ARMATURE-POSITIONING SHAFT ALONG SAID AXIS TO VARY THE FLUX LINKAGES OF SAID SECONDARY COILS WITH SAID PRIMARY COIL MEANS AND THUS CONTROL THE RELATIVE VALUES OF SAID OUTPUT VOLTAGES IN RESPONSE TO THE AXIAL POSITION OF SAID RING ARMATURE.