Patent ID: 7583079

Claim:
A combined sensor and bearing assembly having a capability of detecting a point of origin, which assembly comprises: a rolling bearing unit made up of a rotatable raceway member, a stationary raceway member and at least one row of rolling elements rollingly interposed between the rotatable and stationary raceway members; and a rotation sensor unit including a to-be-detected member made up of a magnet fitted to one of the raceway members; and a magnetic detecting member fitted to the other raceway member at a location confronting the to-be-detected member; wherein the combined sensor and bearing assembly is used at a location close to an electric coil emanating a leakage magnetic field, in a condition in which a direction of flow of an electric current through the coil is fixed in one direction so that a direction of a magnetic flux, with which the magnetic detecting member is switched off, coincides with a direction of the leakage magnetic flux.