Original Monolithic Device of 4-Crossed Axis with Flexure Pivots to be used for the French Watt Balance Experiment

  1. French College of Metrology
  1. Patrick Pinot1,
  2. Stéphane Macé1,
  3. Gérard Genevès2,
  4. Darine Haddad2 and
  5. François Villar2

Published Online: 3 FEB 2010

DOI: 10.1002/9780470611371.ch15

Transverse Disciplines in Metrology

Transverse Disciplines in Metrology

How to Cite

French College of Metrology (2009) Original Monolithic Device of 4-Crossed Axis with Flexure Pivots to be used for the French Watt Balance Experiment, in Transverse Disciplines in Metrology, ISTE, London, UK. doi: 10.1002/9780470611371.ch15

Author Information

  1. 1

    1 - LNE-INM/Cnam 61, rue du Landy F-93210 La Plaine Saint-Denis (France)

  2. 2

    2 - LNE 29, avenue Roger Hennequin F-78197 Trappes Cedex (France)

Publication History

  1. Published Online: 3 FEB 2010
  2. Published Print: 1 JAN 2009

ISBN Information

Print ISBN: 9781848210486

Online ISBN: 9780470611371

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Keywords:

  • flexure pivots;
  • coil suspensions;
  • forces alignment;
  • static phase;
  • monolithic

Summary

In the French watt balance experiment, in order to have a single point of application of a weight and an electromagnetic force balancing this weight, a monolithic system of double gimbals with flexure pivots was made out of copper-beryllium alloy. It also allows a rotation according to four coplanar axes which intersect in one point. The parameters of stiffness of the flexure pivots have been determined by the way of a simple dynamometric method. The study of the dynamic behavior in air of this device has shown a very good decoupling between each gimbal.