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Device for converting mechanical quantities into electrical quantities

  • US 4,181,012 A
  • Filed: 08/29/1978
  • Issued: 01/01/1980
  • Est. Priority Date: 08/31/1977
  • Status: Expired due to Term
First Claim
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1. In a device for converting mechanical quantities into electrical quantities of the class having a strain-exhibiting element, resistance strain gages secured to the strain-exhibiting element, means for applying a mechanical quantity in the form of a mechanical force to the strain-exhibiting element, and means including said strain gages and producing an electrical quantity in response to and corresponding to said force, the improvement wherein:

  • the strain-exhibiting element is a cantilever bar having near the fixed end thereof two strain-exhibiting parts possessing amply lower rigidity than the other parts of the bar and being spaced apart but close to each other in tandem alignment in the longitudinal direction of the bar, the bar being further supported at a point thereof remote from said strain-exhibiting parts and fixed end in a manner permitting the bar at said point to undergo displacement in the longitudinal direction thereof but prohibiting the same from being displaced in a direction parallel to that of said force;

    the strain gages are respectively secured to the bar on the same surface thereof at said strain-exhibiting parts; and

    means are provided to vary the point on the bar at which the force is applied.

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