US PATENT SUBCLASS 318 / 251
.~ Field circuit control
Current as of:
June, 1999
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318 /
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ELECTRICITY: MOTIVE POWER SYSTEMS
246
DF
SERIES MOTORS
{4}
251
.~ Field circuit control {1}
252
DF
.~.~
> Plural, diverse or diversely connected or controlled field coils
DEFINITION
Classification: 318/251
(under subclass 246) Subject matter in which means are provided for controlling the circuit of the field-producing winding.
(1) Note. The mere provision of a plurality of diverse or diversely controlled field coils is sufficient basis for classification herein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
249, for field-control of a series motor by means of impedance devices in the field circuit.
521, and the subclasses specified in the Search Notes thereto, for motor systems having field circuit control means for the motors.
