Electrical position-encoders

Claim 1

AN ELECTRICAL POSITION-ENCODER COMPRISING, A FERROMAGNETIC CORE, A SERIES OF PAIRS OF FERROMAGNETIC TEETH ON SAID CORE, A FIRST ELECTRICAL CONDUCTOR EXTENDING THROUGH SPACES BETWEEN SAID TEETH, A PLURALITY OF SECOND ELECTRICAL CONDUCTORS EACH EXTENDING THROUGH SOME OF THE SPACES BETWEEN SAID TEETH IN ONE DIRECTION WITH RESPECT TO SAID FIRST ELECTRICAL CONDUCTOR AND THROUGH OTHERS OF THE SPACES BETWEEN SAID TEETH IN THE OTHER DIRECTION WITH RESPECT TO SAID FIRST ELECTRICAL CONDUCTOR, EACH OF SAID SPACES BEING CHARACTERIZED BY A UNIQUE COMBINATION OF THE DIRECTIONS IN WHICH SAID SECOND CONDUCTORS EXTEND THERETHROUGH WITH RESPECT TO SAID FIRST ELECTRICAL CONDUCTOR, AND A FERROMAGNETIC BRIDGING ELEMENT, MEANS TO MOUNT THE FERROMAGNETIC BRIDGING ELEMENT AT THE FREE ENDS OF A PAIR OF SAID TEETH TO PROVIDE A RELATIVELY LOW RELUCTANCE MAGNETIC PATH THROUGH THAT PAIR OF TEETH AND THE ELEMENT AND A RELATIVE HIGH RELUCTANCE MAGNETIC PATH BETWEEN THE ELEMENT AND THE CORE OTHER THAN THROUGH THAT PAIR OF TEETH, SAID MEANS TO MOUNT SAID ELEMENT PERMITING RELATIVE MOVEMENT OF THE ELEMENT AND THE TEETH TO SELECT THE PARTICULAR PAIR OF TEETH BRIDGED BY THE ELEMENT, THE PARTICULAR COMBINATION OF INDUCTIVE COUPLING BETWEEN SAID FIRST AND SECOND ELECTRICAL CONDUCTORS THAT IS INCREASED DUE TO THE PRESENCE OF SAID FERROMAGNETIC BRIDGING ELEMENT BEING CHARACTERISTIC OF THE POSITION OF SAID ELEMENT RELATIVE TO SAID CORE.