(under subclass 220) Subject matter having arc extinguishing means.
(1) Note. This subclass relates, for example, to dynamoelectric devices having means to extinguish arcs that result when the commutator flashes over.
SEE OR SEARCH CLASS
361, Electricity: Electrical Systems and Devices,
1+, for safety and protection of systems and devices, indented subclasses 2+ for arc control, subclasses 20+ for generator protective circuits, and subclasses 23+ for motor protective circuits.