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Capacitive measuring assembly for determining forces and pressures

  • US 4,836,033 A
  • Filed: 09/30/1987
  • Issued: 06/06/1989
  • Est. Priority Date: 10/13/1986
  • Status: Expired due to Term
First Claim
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1. An assembly for producing signals corresponding to forces and pressures, comprising:

  • at least three capacitor surfaces situated in two planes substantially opposite to each other;

    a dielectric material between the surfaces in the two planes;

    the surfaces in one plane being movable relative to the surfaces in the other plane against elastic resetting elements;

    one main capacitor surface in one plane lying opposite to all remaining capacitor surfaces in the other plane with intercalation of said dielectric material therebetween and said main surface at least partly covering said remaining surfaces;

    said main surface being movable both normally and parallel relative to said remaining surfaces so that forces that act both normally between said main surface and said remaining surfaces and parallel with said capacitor surfaces can be measured or eliminated from separate capacity valves between said main and remaining surfaces; and

    said remaining surfaces include a smaller surface situated opposite to and completely covered by the main surface and a surrounding surface surrounding said smaller surface, said surrounding surface having an outer edge projecting beyond said main surface so that a differential between capacities of said surrounding surface and said main surface gives a standard for horizontal forces which can be compensated by means of the capacity value between said main surface and said smaller surface in relation to the vertical force component, or vice versa.

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