Apparatus for measuring the positions of plural movable members each associated with a respective magnetorestrictive element

Measuring apparatus for generating a multidigit representation of a value of a variable, said apparatus comprising:

• a plurality of movable members, each corresponding to a respective one of said digits and movable to different positions in response to variation in the value of said variable so that the positions of said members are indicative of the values of said digits;
• a plurality of magnetic field generators associated respectively with said respective movable members, each said generator generating an alternating magnetic field having a parameter which varies as a function of the position of the respective movable member, said alternating fields being at different frequencies from each other such as to be distinguishable from each other;
• an exciting signal generator coupled in common to said magnetic field generators for applying thereto exciting signals at said different respective frequencies;
• and
• an output signal generator coupled in common to said magnetic field generators for producing a plurality of output signals, each corresponding to a respective one of said generated alternating magnetic fields and each having a value dependent upon the value of said varying parameter of the corresponding alternating magnetic field.