Speed sensor pickup assembly with anti-cross talk means

Abstract From the Canadian patent

A dual speed sensor pickup assembly for sensing the rotational velocity of two independently rotatable, closely axially spaced exciter rotors is provided. The pickup assembly includes two speed sensor assemblies each including a pole piece having a longitudinal axis, with the longitudinal axes skewed relative to one another but radial relative to the common axes of rotation of the exciter rotors. Each speed sensor includes a permanent magnet disposed between an end of the pole piece and having a face divided into first and second surfaces by a slot therein. In one embodiment a primary coil and a secondary or anti-cross talk coil surrounds the pole piece of each sensor and each secondary …