Apparatus for generating mutually orthogonal sinusoidal signals utilizing orthogonal hall plates which are relatively adjustable

Claim 1

Apparatus for generating mutually orthogonal sinusoidal signals, comprising: a. an outer element having an interior region; b. magnetic circuit means, affixed to the outer element, to produce a substantially uniform magnetic field across a portion of the interior region; c. an inner element, rotatable within the interior region about an axis orthogonal to the magnetic field, such inner element including: i. a hollow rod having a first surface; and, ii. an inner rod, a first portion thereof being inserted within the hollow rod and a second portion thereof having a second surface; wherein the first surface and the second surface are disposed in the magnetic field; d. a pair of Hall effect cells, one thereof being affixed to the first surface and the other one thereof being affixed to the second surface; wherein a surface of each one of the pair of Hall effect cells is parallel to the axis; and, e. means for securing the inner rod to the hollow rod to fix the orientation of the surface of each one of the pair of Hall effect cells in a mutually orthogonal orientation.