(under subclass 166) Subject matter in which the means for producing a speed signal included means producing a magnetic field and further means sensitive to changes in the field to produce an electrical signal.
SEE OR SEARCH THIS CLASS, SUBCLASS:
200, for magnetic detectors and systems therefor.
SEE OR SEARCH CLASS
73, Measuring and Testing,
519.01, for a speed measuring device using a magnetic drag cup.
310, Electrical Generator or Motor Structure, 40+, for rotary dynamoelectric generator structure.
322, Electricity: Single Generator Systems, appropriate subclasses for single dynamoelectric generator systems.
