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CAPACITIVE MOVEMENT MEASURING DEVICE

  • US 3,723,866 A
  • Filed: 04/07/1971
  • Issued: 03/27/1973
  • Est. Priority Date: 04/10/1970
  • Status: Expired due to Term
First Claim
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1. A movement-measuring device comprising a senser, two elements for said sensor, one of said elements being a rule, parallel surfaces for said rule, the other of said elements being a slider, parallel surfaces for said slider opposite said parallel surfaces of said rule, said elements being movable relatively to one another in a predetermined direction parallel to said parallel surfaces, one of said elements having on each of its parallel surfaces a first set of n electrically interconnected conductive strips, n being an integer greater than one disposed at a predetermined pitch in said predetermined direction, the other of said elements having mounted thereon opposite each of said first sets of strips N electrically interconnected conductive strips disposed at the same pitch, N being an integer greater than one;

  • two capacitances each formed by a set of n interconnecting said capacitances in series; and

    means for measuring the total capacitance.

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