US PATENT SUBCLASS 324 / 166
.~ Including speed-related frequency generator

Current as of: June, 1999
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324 /   HD   ELECTRICITY: MEASURING AND TESTING

160  DF  ELECTRICAL SPEED MEASURING {7}
166.~ Including speed-related frequency generator {5}
167  DF  .~.~> Including rotating magnetic field actuated indicator
168  DF  .~.~> Including periodic switch {2}
172  DF  .~.~> Including synchronized recording medium
173  DF  .~.~> Including magnetic detector {1}
175  DF  .~.~> Including radiant energy detector

DEFINITION

Classification: 324/166

(under subclass 160) Subject matter in which the signal producing means produces a periodic electrical signal whose frequency is a function of the speed being measured.

(1) Note. This subclass includes, for example, apparatus in which an electrical pulse is produced each time the moving object traverses a fixed increment of distance. The movement thus sensed may be either linear or angular (e.g., rotary).

SEE OR SEARCH THIS CLASS, SUBCLASS:

78+, for the measurement of the frequency of cyclic electric currents of voltages.