US PATENT SUBCLASS 318 / 291
.~.~ Armature or primary current reversal

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

280  DF  MOTOR-REVERSING {4}
287  DF  .~ Armature or primary circuit control {2}
291.~.~ Armature or primary current reversal {2}
292  DF  .~.~.~> By shifting motor brushes or selecting appropriate set of brushes
293  DF  .~.~.~> Reversing polarity of current supplied to armature circuit {2}

DEFINITION

Classification: 318/291

(under subclass 287) Subject matter in which means are provided for reversing the direction of current flow in the armature or primary circuit conductors of the motor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

151, for generator-fed motor systems having means for reversing the motor.

300+, for motor systems having means reversing a motor by reversing the field circuit current.

373+, for motor systems having means for braking the motor by "plugging" or by reversing the power applied to the motor which includes reversing the armature current.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems, 127, for switching systems responsive to polarity or reverse current flow.

322, Electricity: Single Generator Systems,

5, for generator systems having means to control the polarity of the generated voltage.