US PATENT SUBCLASS 310 / 172-- .~.~.~.~ Shifting field (e.g., shading pole)

US PATENT SUBCLASS 310 / 172
.~.~.~.~ Shifting field (e.g., shading pole)

Current as of: June, 1999
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310 /	HD	ELECTRICAL GENERATOR OR MOTOR STRUCTURE

10	DF	DYNAMOELECTRIC {5}
40 R	DF	.~ Rotary {28}
159	DF	.~.~ A.C. {5}
166	DF	.~.~.~ Induction {4}
172		.~.~.~.~ Shifting field (e.g., shading pole)

DEFINITION

Classification: 310/172

(under subclass 166) Subject matter relating to shifting field type induction motors.

(1) Note. This subclass relates, for example, to the shaded pole type of induction motor in which, although only a single phase of current is connected to the motor, a true rotating field is obtained by the use of pole faces which are partly free and partly surrounded by a short circuited coil.

SEE OR SEARCH CLASS

318, Electricity: Motive Power Systems,

750, for reversing shaded pole induction motor systems; and subclasses 781+ for shaded pole induction motor systems.