US PATENT SUBCLASS 318 / 79
.~.~.~ Control of both armature (or primary) and field (or secondary) circuits

Current as of: June, 1999
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318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

34  DF  PLURAL, DIVERSE OR DIVERSELY CONTROLLED ELECTRIC MOTORS {22}
66  DF  .~ Running-speed control {4}
68  DF  .~.~ Relative motor speed control {5}
79.~.~.~ Control of both armature (or primary) and field (or secondary) circuits

DEFINITION

Classification: 318/79

(under subclass 68) Subject matter in which means are provided for controlling the armature (or primary) circuit of one or more of the motors in combination with means for also controlling the field (or secondary) circuit of one or more motors, simultaneously or separately.

(1) Note. The armature and field which are controlled may be of the same or different motors.

SEE OR SEARCH THIS CLASS, SUBCLASS:

82+, for plural motor systems having means for controlling the group speed of plural motors by controlling the armature

circuit of the motors.

84, for plural motor systems having means for controlling the group speed of plural motors by controlling the field circuit of the motors.

92, for plural motors systems having acceleration and/or deceleration control by the combined control of the armature and the field circuits. 493, and the subclasses listed in the Search Notes thereto, for miscellaneous motor systems with combined control of the armature and the field circuits.