US PATENT SUBCLASS 318 / 126
.~ Energizing winding circuit control

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

119  DF  RECIPROCATING OR OSCILLATING MOTOR {4}
126.~ Energizing winding circuit control {5}
127  DF  .~.~> Automatic in response to predetermined position, movement or condition in or of the motor or driven device {1}
129  DF  .~.~> By means for producing periodic electrical pulses in the energizing circuit {2}
132  DF  .~.~> By space-discharge or unidirectionally conductive devices in energizing circuit
133  DF  .~.~> By impedance devices in energizing circuit
134  DF  .~.~> By circuit making and/or braking devices

DEFINITION

Classification: 318/126

(under subclass 119) Subject matter in which means are provided for controlling the electric circuit which supplies the electric energy to the energizing winding of the motor.

(1) Note. The control of the electric circuit includes (1) control of the immediate circuit to the windings (as, for example, opening and closing the circuit, controlling a space-discharge device or an impedance connected in series with the circuit and the motor winding, or introducing an aiding or opposing source of e.m.f. in the circuit in addition to the main or prime source of e.m.f.) and also (2) control of the source of energy which supplies the energizing current to the motor (as, for example, controlling the energy input to the source, as by controlling a prime mover which drives a generator, or by controlling the electrical input to an electrical converter).

SEE OR SEARCH THIS CLASS, SUBCLASS:

140, for generator fed motor systems wherein the motor is controlled by controlling the generator.

494, and the subclasses specified in the Notes thereto, for other motor control systems wherein the armature or primary circuit thereto is provided with control means.

521, and the subclasses specified in the Notes thereto, for other motor control systems where in the field or secondary circuit thereto is provided with control means.