Patent ID: 7878314

Claim:
An apparatus for transferring power comprising: a first power transmitting element; a second power transmitting element; a housing; a first locking element received in the housing and coupled to the first power transmitting element; a second locking element received in the housing and coupled to the second power transmitting element, the second locking element being axially movable along a rotational axis about which the first and second locking elements are rotatably disposed such that the second locking element is movable between a first position, in which rotary power is not transmitted between the first and second locking elements, and a second position in which rotary power is transmitted between the first and second locking elements; and a sensor circuit in the housing, the sensor circuit having a first Hall-effect sensor and a second Hall-effect sensor that are configured to sense an axial position of the second locking element, the sensor circuit producing a single analog output current indicative of a sensed axial position of the second locking element.