×

Digitizer tablet

  • US 4,213,005 A
  • Filed: 12/13/1978
  • Issued: 07/15/1980
  • Est. Priority Date: 12/13/1978
  • Status: Expired due to Term
First Claim
Patent Images

1. A system for locating the position of a cursor along a coordinate axis, said system comprising:

  • a plurality of parallel conductors spaced along the axis and defining a locus;

    means for sequentially energizing said conductors in simultaneously energized lesser pluralities with a fixed energization pattern which steps along said plurality of conductors, thereby generating a current sheet which translates along the locus of and parallel to said conductors;

    means for sensing the passage of a particular portion of the current sheet across a reference point carried by the cursor; and

    means responsive to the time of passage of the particular portion of the current sheet for generating an output signal representing the position of the cursor along the coordinate axis.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×