US PATENT SUBCLASS 313 / 39
.~ For electrode within an envelope


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

11  DF  WITH TEMPERATURE MODIFIER {19}
39.~ For electrode within an envelope {1}
40  DF  .~.~> Radiating type surface {1}


DEFINITION

Classification: 313/39

(under subclass 11) Devices which are provided with an envelope and an electrode within the envelope, heat transfer means being provided to modify the temperature of the electrode.

(1) Note. The heat transfer means may be mounted upon or form a part of the electrode. For example, an electrode may be formed with a heat indicating surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:

16, and 29, where the electrode is a liquid electrode. See subclass 16 where an electric heater is provided for the

liquid electrode.

23, and 28, where the device is either provided with a double spaced wall envelope or is provided with an envelope and a jacket or casing which surrounds at least a portion of the envelope and means are provided to modify the temperature of a plurality of electrodes within the envelope. See subclass 23, where the structure includes means to circulate a heat transfer fluid between the envelope walls or between the envelope and the casing or jacket.

28, see the reference to subclass 23 above. 29, see the reference to subclass 16 above.

30+, where the electrode or the electrode lead is hollow and means are provided to modify the temperature of the hollow portion of the electrode or lead.

37+, where the electrode which has its temperature modified is either a filament or a thermionic cathode.

42, for devices under subclass 11 which are provided with an envelope and an electrode lead-in conductor or an electrode support, the electrode lead-in or the electrode lead-in support having heat transfer means mounted thereon or including means to modify the flow of heat along the electrode lead-in or support. Subclass 42 also provides for devices under subclass 11, which are provided with an envelope and which have the heat transfer means mounted upon a lead-in wire exterior to the envelope of the device.

43, for devices under subclass 11 which are provided with an envelope and which have temperature modifying means to protect the lead-in-seal or the stem of the envelope from excessive temperatures.

44, for discharge devices under subclass 11 which have the envelope formed of conductive material, the conductive material being designed for use as an electrode, heat transfer means being arranged to modify the temperature of the conductive envelope wall.

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378, X-Ray or Gamma Ray Systems or Devices,

127+, for X-ray tubes provided with movable targets, usually rotatable, so that the temperature of the target may be maintained cool by moving the target and changing the area exposed to the electron beam during the operation of the device.