Patent ID: 6885187

Claim:
A transmitter system for a Ferraris motion transmitter, comprising: a magnetic measuring arrangement including at least one magnetic field generator for generating a magnetic field and an electrically conductive measuring body, which defines an axis, wherein the magnetic field generator and the measuring body are movable relative to one another in operation, a magnetic field sensor coupled to the magnetic measuring arrangement for providing an output signal commensurate with a velocity or acceleration of the measuring body, wherein at least one of the magnetic field generator and the magnetic field sensor includes at least two magnetic members disposed opposite to one another in concentric relationship to the measuring body and constructed to overlappingly engage one another for guiding the magnetic field as a result of eddy currents forming during operation; and a second said magnetic field sensor, wherein useful fields, effected as a result of a relative movement of the measuring body in the magnetic field sensors are oppositely directed, wherein the output signals of the magnetic field sensors are subtracted.