.~ Plural sources of voltage (including counter e.m.f. cells)
DEFINITION
Classification: 318/500
(under subclass 494) Subject matter in which two or more sources of electromotive force are connected in series, parallel, or series-parallel-circuit relationship with respect to each other and in which one or more of the sources are different in structure or are differently controlled (e.g., with respect to time, magnitude of control, mode of interconnection, etc.) from one or more others of the sources so as to control the resultant voltage applied to the motor armature.
(1) Note. Idly running electric motors or electrolytic cells, for example, which are connected in series with a source of potential and armature circuit of the motor so as to develop or generate a counter-electromotive force are included herein.
(2) Note. Voltage drops across impedance devices merely connected in series with the motor, or the counter-electromotive forces developed within the motor armature winding are not included herein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
105, for motor systems having plural diverse sources of supply for plural motors.
149, for this subject matter in generator-fed motor systems having plural controlled generators, generators being in the armature or primary circuit of the motor. 248, for series-motor systems having plural sources of voltage including plural sources connected in the armature or primary circuit.
293, for this subject matter in systems having opposed sources of supply in the armature circuit of the motor to determine the direction of current flow therethrough (polarity) for reversing the motor.
440, and the subclasses specified in the Notes to the definition of those subclasses for this subject matter where there are a plurality of diverse or diversely controlled sources of supply. If there is no significant diverse characteristics of the sources claimed or no different control of the sources claimed, the patent is classified in subclass 500 and not in subclass 440.
