(under subclass 119) Systems wherein the load device is provided with an auxiliary electrode, the operation of the shunt circuit closing means and/or of the cutout means being controlled by the current and/or potential in the circuit which includes the auxiliary electrode.
(1) Note. In some of the systems in this subclass, the load device is an incandescent filament lamp having an auxiliary electrode mounted in proximity to the filament, the auxiliary electrode being connected in the system so that when the filament is broken, the resultant arc contacts the auxiliary electrode and the shunt circuit closing means or the cut-out means is operated in response to the current flow in the auxiliary electrode circuit.
(2) Note. This subclass includes systems in which the load device is a discharge device having an auxiliary starting or keep-alive electrode, the automatic shunt circuit closing means or cut-out means being operated in response to the current flow conditions in the auxiliary electrode circuit.
SEE OR SEARCH THIS CLASS, SUBCLASS:
335, and the indented subclass and the subclasses specified in the notes to the definition of those subclasses for other systems under the class definition in which the load device is a discharge device provided with an auxiliary electrode.
