February 2011 CLASSIFICATION DEFINITIONS 313 - 1

February 2011 CLASSIFICATION DEFINITIONS 313 - 1 CLASS 313, ELECTRIC LAMP AND DIS- mass. If the particles remain conductively insulated and CHARGE DEVICES the current is transmitted through the mass of particles by the arc or spark, then the device is included within SECTION I - CLASS DEFINITION the scope of Class 313. This is the generic class for electric lamp and electric For the excluded types of lightning arresters see Refer- space discharge device structure. ences to Other Classes, below. Examples of such devices are electric incandescent 4. Electric Lamp Provided With Structure For Holding lamps, gas or vapor filled electric discharge tubes, A Material To Be Heated - See References to Other including lamps, mercury arc devices, vacuum dis- Classes. charge tubes, radio tubes, cyclotrons, cathode-ray tubes, photosensitive discharge devices, secondary emission 5. Molecular Or Atomic Beam Devices - See Refer- electron multipliers, spark plugs, and open air arc and ences to Other Classes. spark devices. 6. Mass Spectrometers - See References to Other Classes. SECTION II - LINES WITH OTHER CLASSES AND WITHIN THIS CLASS 7. Electron Microscopes - See References to Other Classes. For specific class references where not provided in the sections below, see References to Other Classes that 8. Cathode Ray Oscillographs - See References to refer to the particular section title. Other Classes. A. LAMPS AND DISCHARGE DEVICE STRUC- 9. Consumable Electrode Discharge Devices (e.g., Arc TURE CLASSIFIED ELSEWHERe Lamps, etc.) - See References to Other Classes. 1. X-ray Tubes And Targets - See References to Other 10. Lamps And Discharge Devices Having A Circuit Classes. Element Included Therein 2. Insulators With Arcing Devices - See References to An electromagnet connected in circuit with an electrode Other Classes. does not prevent classification of a lamp or space discharge device in Class 313 if the electromagnet is an 3. Lightning Arresters - Class 313 includes lightning operator for moving an electrode or if the electromagnet arresters where the only structure is an arc or spark gap. generates a magnetic flux which influences the opera- Excluded are lightning arresters which include an arc or tion of the lamp or space discharge device (see Subclass spark gap in combination with an impedance element References to the Current Class, below). The inherent such as a resistance, or inductance. Also excluded are resistance of an electrode, although significant to the arc or spark gap arresters in combination with a circuit operation of the device, is not considered a circuit ele- maker or breaker such as a thermostatic switch or fuse. ment such as would prevent classification in Class 313. Excluded from Class 313 are the lightning arresters of Also See References to Other Classes. the arc or spark gap type which are designed to have the electrodes brought into physical contact upon a pro- 11. Discharge Devices Structurally Combined With And longed discharge or which are provided with a material, In Circuit Relation With Incandescent Lamps- See Ref- such as, a fusible substance which melts and flows erences to Other Classes. between the electrodes to short-circuit the electrodes upon a prolonged discharge. 12. Discharge Devices Having The Cathode Heater or Other Structurally Combined Heater In Circuit Relation Among the excluded types of lightning arresters is the Therewith- See References to Other Classes. type including a mass of particulate particles, each particle being insulated from the other, usually by a coating 13. Gas Pumps And Fans- See References to Other upon the surface of the particle. When a discharge Classes. passes from particle to particle, the surface material becomes conductive making a short-circuit through the B. LAMP AND DISCHARGE DEVICE SYSTEMS February 2011 313 - 2 CLASSIFICATION DEFINITIONS February 2011 This class does not include electric systems for supply- Where the support is a casing, jacket, electrical connec- ing electric current and/or potential to electric lamps or tor (e.g., socket) or includes means for modifying the to discharge devices. temperature of the lamp or discharge device, see below. Patents which claim a lamp or discharge device having Lamps including discharge device lamps combined with electrodes which are adapted to have current or potential a supporting means for the lamp are excluded from impressed upon the electrodes or which claim a lamp or Class 313. discharge device with means recited broadly (no specific means, such as a battery, source etc., being Class 313 is the generic class for discharge devices in included) to impress current or potential on the elec- combination with supporting means for the discharge trodes are classified in this class as lamps or discharge device. devices unless some circuit elements are claimed which positively limit the claims to a system rather than to a Also See References to Other Classes, below. lamp or discharge device, per se. However, where the relative potentials between the electrodes are claimed, F. COMBINED WITH TEMPERATURE MODIFY- the patent is classified as a system. ING MEANS For example, a claim to a discharge device having an 1. With Enclosing Casing Or Jacket: anode adapted to be maintained at a high positive potential, a control electrode adapted to be maintained at a Class 313 is a generic class for all discharge devices low negative potential, and a cathode adapted to be where significant discharge device structure is claimed maintained at ground potential will be excluded from in combination with a jacket, casing or enclosure having this class and will be found in the appropriate system means to modify the temperature of the discharge class. device. (See Subclass References to the Current Class, below.) For discharge devices and lamp systems, see References to Other Classes, below. Included in Class 313 are all lamps, per se, and discharge devices, per se, which are provided with a double C. METHOD OF OPERATING LAMPS OR DIS- walled envelope or two sealed enclosing envelopes, the CHARGE DEVICE second envelope being an integral part of the lamp or discharge device structure, the space between the two Patents which claim a method of operating a lamp or envelope portions being evacuated or filled with heat discharge device are excluded from this class and will transfer or insulating means to modify the temperature be found in the class which provides for the system of the lamp or discharge device. (See Subclass Refer- which is required to operate the device. See above for ences to the Current Class, below.) the classification of electric lamp and discharge device systems. Also See References to Other Classes, below. See References to Other Classes, below. D. METHODS AND APPARATUS FOR SUBJECT- 2. Lamp, Discharge Devices, And Envelopes Therefor ING OBJECTS, ARTICLES AND MATERIALS TO With Temperature Modifying Means RAY ENERGY OR ELECTRONS OR IONS GENER- ATED BY DISCHARGE DEVICES OR LAMPS Class 313, provides for all lamp and discharge device structures, per se, where significant lamp or discharge Class 313 does not include either processes or apparatus device structure is claimed and which include means for for subjecting materials, articles or objects to the ray modifying the temperature of the lamp or discharge energy (e.g., ultraviolet light, X-rays, etc.) or to elec- device, excepting lamps and discharge devices of the trons, ions, arcs or sparks generated by electric lamps or consumable electrode type which are classified else- discharge devices. where. (See References to Other Classes, below.) For such methods and apparatus, see References to See above when the lamp or discharge device is pro- Other Classes, below. vided with a separable casing, jacket, or enclosure and which include means to modify the temperature of the E. COMBINED WITH A SUPPORT lamp or discharge device, and also see above with February1 2011 February 2011 CLASSIFICATION DEFINITIONS 313 - 3 respect to photocells provided with temperature modify- constitute an integral structure. Where the second enve- ing means where no significant photocell structure is lope wall is not integral with the lamp envelope, that is, claimed. it is removable therefrom, the patent is excluded from Class 313 and will be found elsewhere. The combina- See Class 313 for lamp and discharge device structure tion of an envelope, box or housing (such as a lamp or which include means for modifying the temperature of discharge device envelope) and either a separable or the lamp or discharge device. Included are lamp and integral casing or housing where electrical features are discharge devices, per se, having heating means for rais- claimed is classified elsewhere. (See References to ing the temperature of the device, devices with elec- Other Classes, below.) trodes provided with cooling ducts or heat radiators, devices with means to modify the temperature of the See Class 313 for lamps and discharge devices which envelope, including double walled envelopes or two have an integral double wall envelope; for discharge sealed enclosing envelopes with a heat conducting or devices having an envelope and a casing or jacket there- heat insulating medium (including vacuum) in the space for; for where the discharge device is provided with an between the two envelope walls, devices with heat con- electrical shield and for other discharge devices pro- ducting or insulating members, etc.. Also included is the vided with a casing or jacket. (See Subclass References structure of electrodes for lamps and discharge devices to the Current Class, below.) which are provided with means to modify the temperature of the electrode (e.g., electrodes with cooling fins, Also See References to Other Classes. fluid ducts, heat transmission means, etc.). H. COMBINED WITH OPTICAL DEVICE OR HAV- Excluded from Class 313 are mere envelopes, for elec- ING SPECIAL RAY TRANSPARENT ENVELOPE tric lamps or discharge devices provided with tempera- (E.G., FILTER, REFLECTOR, LENS, LIGHT DIS- ture modifying means where no significant lamp or TRIBUTOR OR MODIFIER LIGHT SHIELD, LIGHT discharge device structure is claimed.

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