Rotary sensor using magnets resistance devices for detecting the rotation of a mechanical system

Claim 1

A rotary sensor comprising: a. a frame member including at least two magnetic bar yokes which are magnetically shorted and positioned parallel to each other wherein at least a pair of said bar yokes comprises alternately arranged magnetic pieces and magnets, wherein said magnets are arranged with interpositioned magnetic pieces so that like poles of the magnets are opposed to each other; b. a shaft member comprising a center shaft provided in a space formed between said bar yokes so as to be parallel with the bar yokes, and at least two elongated magnetic segment means, said segment means being mounted at a point between the ends thereof perpendicular to the axis of the shaft and at different points along the length of the shaft, and intersecting the shaft such that the plane formed by the axis of the shaft and the longitudinal axis of each segment means is different for each segment means, wherein the magnetic pieces of each bar yoke on opposite sides of said shaft are in the same plane perpendicular to said shaft and are magnetized with opposite polarities and wherein each of said segment means lies in the plane of a pair of magnetic means perpendicular to said shaft; c. a retaining means which fixes one of said frame member or shaft member so that it cannot be rotated; d. a connecting means which couples the other of said shaft member or frame member to an external mechanical rotating system; and, e. at least two galvano-magneto effect devices positioned on said frame member each said galvano-magneto effect device being in the plane of a corresponding segment means, wherein the concentrated magnetic flux from said magnets is applied to said galvano-magneto effect devices when the ends of said segment means approach the bar yokes.