US PATENT SUBCLASS 363 / 165
.~ With automatic frequency control


Current as of: June, 1999
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363 /   HD   ELECTRIC POWER CONVERSION SYSTEMS

157  DF  FREQUENCY CONVERSION (f1-f2) WITHOUT INTERMEDIATE CONVERSION TO D.C. {7}
165.~ With automatic frequency control


DEFINITION

Classification: 363/165

With automatic frequency control:

(under subclass 157) Subject matter wherein means responsive to a predetermined condition acts upon the system to provide a control to maintain or vary the output frequency of the system in response to that condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

164, for frequency conversion with automatic voltage magnitude control.

SEE OR SEARCH CLASS

322, Electricity: Single Generator Systems,

17+, for miscellaneous generator systems having automatic control of generator or driving means, which control may be control of the output frequency.

331, Oscillators, 1+, for oscillation generation systems with automatic frequency stabilization.