(under subclass 567) Subject matter which includes a protective member, (1) to protect the electrode from the ionized gas or vapor within the envelope, or (2) to restrict the area of the electrode available to receive the ionized discharge of gas or vapor.
(1) Note. See the to this class for the word "shield".
(2) Note. The shield may be an conductor or an insulator.
(3) Note. Here is an electrode surrounded by a conductive or an insulative shield which limits the area of the electrode to receive the ionized gas or vapor discharge in the envelope.
SEE OR SEARCH THIS CLASS, SUBCLASS:
147, for a lamp or discharge device having a movable shield.
239+, for devices having a support and/or spacing structure for electrode and/or shield.
326+, for shield structures, defined by structure, for a lamp or discharge device. 492, for a lamp or discharge device with luminescent solid or liquid material and gaseous discharge medium having the solid or liquid on the envelope and an electrode shield.
590, for a three or more electrode gas or vapor discharge device with a shield to prevent discharge between electrodes.
592+, for a three or more electrode gas or vapor discharge device with a shield grid electrode.
626, for a gas or vapor discharge device having electrode leading shields.
