(under subclass 64) Subject matter in which the substitute or emergency source is a dynamoelectric source.
(1) Note. The dynamoelectric source, for example, may be supplied with an inertia type massive flywheel and normally act as a motor across the line to supply current, as a generator, when the normal voltage supply is interrupted.
SEE OR SEARCH THIS CLASS, SUBCLASS:
44+, for this subject matter. Note especially indented subclass 47.
