MAGNETO-RESISTANCE QUADRUPOLE MAGNETIC CODED SWITCH

A quadrupole magnetic coded switch includes a switch housing, an actuator housing, a first pair of actuator dipole magnets, a first pair of switch dipole magnets, and a pair of first magneto-resistance (MR) sensors. The actuator housing is movable relative to the switch housing. The first pair of actuator dipole magnets is coupled to the actuator housing and is movable therewith, and the first pair of switch dipole magnets is coupled to the switch housing. The first pair of actuator dipole magnets and the first pair of switch dipole magnets are arranged to generate a first quadrupole magnetic field. Each of the first MR sensors is disposed within the switch housing and is configured to vary in resistance in response to relative movement of the actuator housing and the switch housing.