(under subclass 1.75) Subject matter including a spinning mass, usually a disk or wheel, the spin axis of which turns between two low friction supports and maintains its angular orientation with respect to inertial coordinates when not
subjected to external torques wherein the spinning mass is either (a) a part of the apparatus for proving or calibrating the device or (b) the device being proven or calibrated.
SEE OR SEARCH CLASS
74, Machine Element or Mechanism,
5+, for special features of gyroscope, per se, and especially subclass 5.22 as the generic place for gyroscopes combined with other structure.
