(under subclass 275) Devices which have the insulating member which supports the filament supported by an electrically conductive supporting member (e.g., wire, rod or tube.)
(1) Note. The conductive wire, rod or tube may be used as
one of the lead-in wires for conducting electrical current to the filament.
(2) Note. Among the structures found in this are devices having an insulating plate or bar supported by a conductive wire or rod, a filament being supported by the insulator. Sometimes, the filament is V-shaped or W-shaped, and the insulating rod is provided with means to engage and support the filament at a plurality of points.
SEE OR SEARCH THIS CLASS, SUBCLASS:
257, for discharge devices under subclass 238 which have an envelope and a plurality of electrodes supported by conductive supports within the envelope an insulating spacer member being interposed between a plurality of the electrodes or electrode supports, a filament being supported by the insulating spacer member.
264, for discharge devices under subclass 238 which have an envelope and a plurality of electrodes therein, the supporting structure for the electrodes including means to support a U-shaped, V-shaped or W-shaped filament. 285, for devices under subclass 238 which are provided with an envelope and an electrode other than a filament, therein, the electrode being supported by an intermediate supporting member, such as an insulating plate, rod, or bead, the intermediate member being supported by a conductive support.
