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DIGITAL POSITION SENSOR

  • US 3,810,136 A
  • Filed: 02/15/1973
  • Issued: 05/07/1974
  • Est. Priority Date: 02/15/1973
  • Status: Expired due to Term
First Claim
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1. A digital position sensor comprising:

  • a. a plurality of magnetic elements arranged on a non-magnetic surface to form an upper and a lower row of spaced elements;

    b. a pickup assembly in spaced relationship to said rows, said assembly comprising;

    a support member having a plurality of shaped magnetic segments attached thereto with an upper portion of each segment aligned with said upper row and a lower portion aligned with said lower row;

    a first excitation coil magnetically coupled to the upper portions of said segments;

    a first pickup coil similarly coupled to said upper portions;

    a second excitation coil magnetically coupled to the lower portions of said segments; and

    a second pickup coil similarly coupled to said lower portions; and

    c. means to effect relative motion between said rows and said assembly.

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