US PATENT SUBCLASS 313 / 18
.~.~ For conductive envelope devices

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

11  DF  WITH TEMPERATURE MODIFIER {19}
17  DF  .~ Double wall, jacket or casing for envelope {5}
18.~.~ For conductive envelope devices {3}
19  DF  .~.~.~> With plural electrode temperature modifying
20  DF  .~.~.~> With internal temperature modifying baffle
21  DF  .~.~.~> Cylindrical electrode type envelope

DEFINITION

Classification: 313/18

(under subclass 17) Subject matter in which the envelope of the lamp or discharge device is provided with an integral double wall envelope made in whole or in part of electrically conductive material, and discharge devices which are provided with envelopes formed in whole or in part of electrically conductive material and in which the casing or jacket encloses the electrically conductive portion of the envelope or a portion thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44, for other lamps and discharge devices under subclass 11 which have a conductive envelope and which are provided with means for modifying the temperature of the envelope wall. Included in subclass 44 are discharge devices which are provided with a separable sleeve which fits about a portion of the envelope wall, the sleeve being provided with heat exchange means (e.g., radiating fins).

246+, for discharge devices which are provided with a conductive envelope portion (e.g., anode) and means to support one or more electrodes (e.g., cathode, grid) within the conductive envelope portion usually by means of the closure for the conductive envelope portion.

317+, for devices under the class definition having envelopes or a part thereof made of conductive material.

SEE OR SEARCH CLASS 220, Receptacles,

2.3, for envelopes for discharge devices and lamps which are made in whole or in part of conductive material.