US PATENT SUBCLASS 313 / 278
.~.~ Tension device for filament


Current as of: June, 1999
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313 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES

238  DF  WITH SUPPORT AND/OR SPACING STRUCTURE FOR ELECTRODE AND/OR SHIELD {9}
271  DF  .~ For filament {6}
278.~.~ Tension device for filament


DEFINITION

Classification: 313/278

(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.