US PATENT SUBCLASS 313 / 238
WITH SUPPORT AND/OR SPACING STRUCTURE FOR ELECTRODE AND/OR SHIELD

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

238WITH SUPPORT AND/OR SPACING STRUCTURE FOR ELECTRODE AND/OR SHIELD {9}
239  DF  .~> For shield {2}
243  DF  .~> For plural electrodes of discharge device {3}
269  DF  .~> With vibration damping device
270  DF  .~> For indirectly heated cathode
271  DF  .~> For filament {6}
281  DF  .~> Support mounted in or around aperture in conductive wall or plate
282  DF  .~> Conductive envelope supports electrode
283  DF  .~> Electrode supported by envelope {2}
292  DF  .~> Supporting and/or spacing elements

DEFINITION

Classification: 313/238

(under the class definition) Devices having means for supporting an electrode or a shielding structure, and/or provided with means to space an electrode, or a shield, or a support for an electrode or shield with respect to another part of the device.

(1) Note. This and the indented subclasses provide only for patents which claim significant supporting and/or spacing structure for the electrode or shield. Where the claim broadly recites supporting and/or spacing means for the electrode and shield and no structure of the supporting and/or spacing means is included in the claim, the patent is excluded from this and the indented subclasses and will be found in one of the other appropriate subclasses of this class. Where the patent for the device discloses or claims structure in addition to the supporting and/or spacing structure for an electrode or a shield, the patent is classified in this or one of the indented subclasses, and is cross-referenced for the additional structure to the other subclasses below these subclasses. This and the indented subclasses also include cross-references of lamps and discharge devices which disclose specific supporting and/or spacing structure for an electrode or shield which are classified in the preceding subclasses.

(2) Note. A spacer is a means, such as a rod, bar, or plate, provided to maintain an electrode or shield or a supporting member in spaced relation with respect to another part of the device, and is usually in addition to the means for supporting the electrode or shield with respect to the supporting base or envelope of the device. Members interposed between two different electrodes or electrode supports are considered spacing members. Members interposed between an electrode and the envelope of the device which are not intended to support the mass of the electrode with respect to the envelope are spacing members. Where one electrode is mounted upon a second electrode, as for example, being wound upon or coiled about the second electrode, the second electrode is a spacing member. Spacers are usually mounted upon, and supported by, an electrode or electrode support, but a spacer interposed between two electrodes may serve to at least partially support the third electrode with respect to a supporting base.

(3) Note. For the definition of "electrode" and "shield", see the glossary in the class definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

42, for devices under the class definition which have a heat transfer means (e.g., cooling fins) mounted upon an electrode support or which have an electrode support designed to modify the flow of heat along the electrode support (e.g., to restrict or accelerate the flow of heat). 49, for devices under the class definition which are provided with a support for the device.

118+, for spark plugs with supporting and spacing structure. 146, for devices under the class definition which have an electrode or shield movably mounted upon its support.

237, for devices under the class definition which have an electrode and a spare electrode, the supporting means for the electrode being designed so that the first electrode may be removed from its support when it fails to operate properly and the second electrode substituted therefor.

SEE OR SEARCH CLASS

248, Supports, appropriate subclasses for miscellaneous supports for articles.

314, Electric Lamp and Discharge Devices: Consumable Electrodes, appropriate subclasses for discharge devices of the consumable electrode type (e.g., arc lamps and similar devices which are provided with means for feeding the electrodes together as they are consumed) which have supporting and/or spacing structure for an electrode or shield.