US PATENT SUBCLASS 313 / 265
.~.~.~.~ Apertured electrode (e.g., grid) supported between two other electrodes

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


313 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES

238  DF  WITH SUPPORT AND/OR SPACING STRUCTURE FOR ELECTRODE AND/OR SHIELD {9}
243  DF  .~ For plural electrodes of discharge device {3}
244  DF  .~.~ Envelope supports or forms electrode {5}
252  DF  .~.~.~ Support structure supported by the envelope {7}
265.~.~.~.~ Apertured electrode (e.g., grid) supported between two other electrodes

DEFINITION

Classification: 313/265

(under subclass 252) Miscellaneous discharge devices having a foraminous or grid electrode supported between two other electrodes.

(1) Note. As this is the miscellaneous subclass under subclass 252 where the discharge device is provided with a grid or apertured electrode, cross-references of disclosures classified either as original copies or cross-reference copies in subclass 253 to 264 are not placed in this subclass.

(2) Note. In some of the devices in this subclass the foraminous or grid electrode is intended to be used to control the discharge between the anode and cathode of the discharge device. In other of the devices, the interposed foraminous or grid-like electrode is intended to be used as an anode in the discharge device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

241, where the discharge device is provided with a plurality of discharge electrodes which are mounted in side by side, coaxial or concentric relation, an end of the electrodes being located in substantially coplanar relation, a shield electrode extending across the ends of the electrodes.

245, where the discharge device includes four or more electrodes which are arranged to form at least two different discharge spaces, one of the discharge spaces having a foraminous or grid electrode mounted therein. 247, for this subject matter where the envelope of the discharge device is formed of metal or conductive material, the hollow metal or conductive portion of the envelope being designed for use as an electrode of the discharge device, and having a foraminous or grid electrode supported by the end closure of the hollow metal or conductive envelope portion.

248, where the envelope of the discharge device is made of metal or conductive material, and a plurality of electrodes, including a foraminous or grid electrode, are supported by the metallic or conductive envelope wall.

249, for this subject matter where the discharge device envelope is elongated, and a plurality of electrodes, including a foraminous or grid electrode, are supported in spaced relation along the longitudinal axis of the envelope.

253, through 264, see (1) Note, above.

293+, for patents for discharge devices within the class definition which have a foraminous or grid electrode interposed between two other electrodes and where no significant supporting and/or spacing structure for the electrodes is claimed.

348+, for the structure of foraminous or grid electrodes, per se.