(under subclass 271) Devices which include means to apply a tension force to the filament.
SEE OR SEARCH THIS CLASS, SUBCLASS:
257, for discharge devices which are provided with an envelope and a plurality of electrodes supported by supports therein, a spacer member being interposed between the electrodes or the electrode supports, a filament being supported by tension applying means, the tension means being supported by the spacing member.
284+, for devices under subclass 238 which include an envelope and an electrode supported by supporting means therein, the supporting means being resilient or flexible.
