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Interface device

  • US 4,227,308 A
  • Filed: 09/15/1978
  • Issued: 10/14/1980
  • Est. Priority Date: 09/15/1978
  • Status: Expired due to Term
First Claim
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1. A measuring device comprising:

  • a displaceable material contacting means, circuit means engageable with said material contacting means, a display means connected to said circuit means, a first and a plurality of secondary electrical contact means included within said circuit means, said secondary contact means being uniformly spaced from each other the width of said secondary contact means and spaced from said first contact means, said secondary contact means being of uniform width, a conducting means joined to said material contacting means, said conducting means being displaceable along said first and secondary contact means, said conducting means having a width greater than the width of said secondary contact means whereby said conducting means is capable of contacting two secondary contact means simultaneously.

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