Annular speed sensor with a tone ring having both axial and radial magnetic fields

A bearing assembly comprising:

• an inner bearing race located radially within an outer bearing race having an axis of rotation,
• a plurality of rolling bearing elements located radially between said inner and outer bearing races permitting relative rotation between said races,
• a tone ring having regions of axial magnetic poles which alternate in polarity and radial magnetic poles which alternate in polarity, said tone ring being fixed relative to one of said bearing races;
• an annular transducer fixed to the other of said bearing races, said transducer having a case made of a ferromagnetic material defining axial and radial field receiving teeth, said axial field receiving teeth arranged relative to said tone ring axial magnetic poles such that said axial field receiving teeth are magnetically coupled to said axial magnetic poles and said radial field receiving teeth arranged relative to said radial magnetic poles such that said radial field receiving teeth are magnetically coupled to said radial magnetic poles, and said axial and radial field receiving teeth being coupled to said tone ring such that said axial and radial magnetic poles are exposed to said axial and radial teeth respectively upon relative rotation between said tone ring and said transducer;
• and
• a conductive winding within said transducer whereby an alternating magnetic flux passes through said transducer in response to said relative rotation inducing an alternating voltage in said winding indicative of speed of said relative rotation.