US PATENT SUBCLASS 313 / 17
.~ Double wall, jacket or casing for envelope

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

11  DF  WITH TEMPERATURE MODIFIER {19}
17.~ Double wall, jacket or casing for envelope {5}
18  DF  .~.~> For conductive envelope devices {3}
22  DF  .~.~> Fluid circulation type {2}
25  DF  .~.~> Sealed casing for envelope {1}
27  DF  .~.~> Heat conserving or insulating type
28  DF  .~.~> Plural electrode temperature modifying

DEFINITION

Classification: 313/17

(under subclass 11) Subject matter in which a lamp or discharge device is provided with a an integral spaced double walled envelope, and discharge devices which are provided with envelopes and in which the means for modifying the temperature of the discharge device includes a jacket or casing which encloses the envelope of the device or a portion thereof.

(1) Note. Neither this nor any of the indented subclasses provide for electric lamps including those of the discharge device type, photosensitive discharge devices nor generators of invisible radiation such as X-ray tubes, ultraviolet ray generators in combination with a separable casing for the lamp or device which is provided with means for modifying the temperature of the lamp or device. See the class definition for the classes which provide for the excluded subject matter.

(2) Note. The double-walled envelopes specified above includes only walls which are spaced apart. The double walled envelope may be provided with means for circulating a fluid between the spaced walls or the space between the walls may be evacuated, gas filled or filled with a heat insulating or transmitting material. See the class definition for the classification of double-wall envelopes, per se.

(3) Note. The jacket or casing which encloses the discharge device or lamp must have its walls spaced from the envelope of the lamp or discharge device. Where the device is provided with a sleeve with heat exchange means such as radiating fins which fit over and into contact with the envelope of the device, the device is excluded from this and the indented subclass and will be found in subclass 44 below.

(4) Note. Included as separable casings and jackets are structures formed of coiled conduits which are designed to receive the discharge device and to transfer heat to or from the envelope of the discharge device.

(5) Note. See the class definition for other classes which provide for the miscellaneous heat transfer apparatus such as envelopes and casings for lamps or discharge devices which are provided with temperature modifying means. SEE OR SEARCH THIS CLASS, SUBCLASS:

44, see (3) Note, above.

312, and the subclasses specified in the notes thereto for devices under the class definition which are provided with an envelope and which have a casing or jacket for the envelope.

324, and the subclasses specified in the notes thereto for devices under the class definition which do not have an envelope but which have a casing or jacket for the device.

SEE OR SEARCH CLASS

165, Heat Exchange,

74, for a removable device to be heated or cooled projecting into a casing, and subclasses 154+ for coaxial enclosures.

215, Bottles and Jars,

12.1+, for receptacles of glass or other ceramic or similar materials, of the bottle, jar, or jug type, which are encased in a protective casing or jacket or having spaced walls.

220, Receptacles,

2.1+, for miscellaneous envelopes, casings and jackets designed for use with electric lamps, discharge devices and similar devices and subclasses 415+ for miscellaneous receptacles having double walls where the inner and outer walls are spaced apart, with or without intervening packing or insulation.

314, Electric Lamp and Discharge Devices: Consumable Electrodes, 26+, for discharge devices of the consumable electrode type (e.g., arc lamps) which are provided with means for modifying the temperature of a portion of the device, the temperature modifying means including a separable casing or jacket for a portion of the device.