Photocompensated amplifiers with torsion-suspension galvanometers

Conclusions

The above investigations have shown that in order to decrease drastically the galvanometer's sensitivity to shock it is necessary to suppress or prevent transverse oscillations of its moving part. This can be achieved by the use of transverse oscillation dampers.

Magnetic induction dampers, for instance, can be used. Transverse oscillations occur almost exclusively in the direction of the least stiffness of suspensions, thus facilitating the design of magnetic induction dampers.

However, liquid dampers seem to be more promising. Such damping can be achieved either by immersing the whole moving part in a liquid, or by means of concentrated drop dampers [7]. Preliminary experiments have shown the great efficiency of liquid dampers. It would appear that the use of such dampers in the control galvanometers of photocompensated systems will make it possible to use these instruments under the most difficult operating conditions.