(under subclass 160) Subject matter in which means are provided for comparing one speed signal with another speed signal or a reference signal.
(1) Note. The comparison means is not necessarily electrical.
SEE OR SEARCH THIS CLASS, SUBCLASS:
79, for comparison of the frequencies of two electrical signals.
SEE OR SEARCH CLASS
307, Electrical Transmission or Interconnection Systems,
123, for switching systems responsive to the differential speed between two bodies. 361, Electricity: Electrical Systems and Devices,
243+, for the synchronization of rotating shafts which requires a comparison of the speeds of the shafts. Also consult the search notes to that subclass for a compilation of other pertinent classes.
