Patent ID: 6057516
Filing Date: 2000-05-02
Classification: G01G

Abstract:
In a thermogavitmetric device including a stationary portion including a pivot support member, a torsion wire having two ends mounted on the pivot support member to maintain a tension in a central portion of the wire, a balance beam assembly fixedly mounted on a central portion of the torsion wire and placed horizonally, the torsion wire acting as a support and pivot for the balance beam assembly and defining a pivotal axis, a sample holder mounted at one end of the balance beam assembly, a driving device for adjusting a tilt angle of the balance beam assembly around the pivot, and a sensing device for sensing a rotation of the balance beam assembly, an improvement comprising:a stopper mechanism for limiting the range of movements of the balance beam assembly relative to the stationary portion, the stopper mechanism comprising a first stopper member mounted on the stationary portion and a second stopper member mounted on the balance beam assembly, the first and second stopper members defining a gap therebetween, wherein one of the first and second stopper members defines an opening, and the other of the first and second stopper members has a portion extending through the opening.