US PATENT SUBCLASS 313 / 333
.~.~ Filament or wire shield or electrode


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

326  DF  ELECTRODE AND SHIELD STRUCTURES {14}
331  DF  .~ With lead wire or connector {4}
333.~.~ Filament or wire shield or electrode


DEFINITION

Classification: 313/333

(under subclass 331) Structure where the electrode or shield is a filament or formed of wire and the lead wire or connector is attached to the filament or wire.

SEE OR SEARCH THIS CLASS, SUBCLASS:

271+, for devices under the class definition which have significant supporting and/or spacing structures for a filament. In some of these devices, the supporting members are formed of electrically conductive material and are designed to be used as the lead-in conductor to conduct electricity to the electrode.

332, when there is, (1) a connector or coupling section mounted between and joined to the filament or wire and the lead wire or connector, or (2) a material is interposed between the electrode or shield and the lead wire or connector.

341+, for the structure of filaments for electric lamps and discharge devices.

348+, for electrodes and shields for electric lamps and discharge devices other than filaments which are made of wire (e.g., grids).

SEE OR SEARCH CLASS 403, Joints and Connections, appropriate subclasses for a mere connection between a filament or wire and another wire even though designated as an electrical connection.

439, Electrical Connectors, appropriate subclasses for an electrical connector, generally, and for the combination of an electrical connector with a "named" electric lamp. See the class definition of that class (439), section IV, for the line between Class 439 and other classes which provide for joint structure.