(under subclass 69) Subject matter having the circuit for controlling the supply of current to the motor controlled by an electric switch, the switch being operated in response to the condition of the electric discharge.
(1) Note. Continue the search in subclasses 70 and 72 of this class.
SEE OR SEARCH CLASS
318, Electricity: Motive Power Systems,
519, and the search notes thereunder for electric motor control by means of armature or primary circuit making and breaking devices.
