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Point location and graphics display apparatus

  • US 4,506,336 A
  • Filed: 09/23/1980
  • Issued: 03/19/1985
  • Est. Priority Date: 09/23/1980
  • Status: Expired due to Term
First Claim
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1. A point location system comprising:

  • a digitizer includinga normally straight tape being cross-sectionally curved defining a narrow tape width and concave and convex tape surfaces, and the tape including a plurality of holes longitudinally disposed adjacent at least one of its edges;

    the tape having the resiliency to be bent in a radius toward its concave surface, and the width of the tape being normally flattened where so bent and the tape having the tendency to return to its straight orientation;

    a rotatable roller for receiving a length of said tape concave surface bent in a radius thereagainst, and the roller including sprockets for engaging with said holes, and the sprockets including inclinations and alignment lands, and said holes thereby transversely sliding upon said inclinations to said lands as said roller is rotated and said tape width is flattened and said holes engage said sprockets; and

    a shaft coaxially mounted to said rotatable roller.

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