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Device for measuring force

  • US 4,614,245 A
  • Filed: 04/17/1985
  • Issued: 09/30/1986
  • Est. Priority Date: 10/05/1982
  • Status: Expired due to Term
First Claim
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1. A device for measuring a force, comprising first and second cantilever-type elastic members fixed at one of their respective ends and arranged in parallel spaced relationship, a spacer member between the fixed ends of said elastic members, a metal wire stretched between the free ends of said elastic members, means for applying the force to be measured to the free end of said first elastic member, means for converting vibration of said metal wire into electrical oscillation, means for measuring the frequency of said oscillation, and arithmetic means for calculating said force from said frequency;

  • wherein said spacer member and said metal wire are made of materials having substantially the same linear expansion coefficient and have substantially the same effective dimension in the longitudinal direction of said metal wire, and wherein said first and second elastic members are made of materials having substantially the same temperature coefficients of elastic modulus.

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