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Precision control apparatus

  • US 3,911,586 A
  • Filed: 06/27/1973
  • Issued: 10/14/1975
  • Est. Priority Date: 06/29/1972
  • Status: Expired due to Term
First Claim
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1. An apparatus for checking machined parts, comprising:

  • a rigid elongated body consisting of a bar and two end-plugs and being constructively made in one single piece;

    said bar having an external surface;

    said end-plugs being substantially identical with outer faces parallel to one another;

    said end-plugs having transverse cross-sections greater than the transverse crosssection of said bar;

    said identical end-plugs including, on each edge thereof, a supporting zone perpendicular to said outer faces and parallel to the longitudinal axis of said elongated body;

    a ring;

    measuring instrument means carried by said ring for measuring deviations from the plane defined by said supporting zones and including a probe with one extremity interposed between said supporting zones;

    said ring consisting of at least two detachably connected parts and having an internal surface of the same shape as said external surface of said bar for allowing the displacement of said ring axially along said bar;

    the internal dimensions of said ring being greater than the dimensions of the transverse section of said bar;

    said ring being provided with shoes having a low coefficient of friction, said shoes being interposed between said ring and said external surface of said bar.

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