(under subclass 311) Subject matter wherein the heating structure includes an arc or spark.
(1) Note. Included herein are the subcombinations including the electrical arc or spark excitation unit which includes the support for the sample to be analyzed even though optical elements of the spectrophotometer are not claimed.
SEE OR SEARCH CLASS
219, Electric Heating,
69, for the arc cutting or disintegration of metals; subclasses 121.11+ for the heating of metals by electric arc; subclasses 271+ for arc-type electric heaters with vaporizers; and subclasses 383+ for arc-type nonmetal heating devices.
313, Electrical Lamp and Discharge Devices,
243, for arc-type devices of the general usage type; and subclasses 326+ for electrode structure not of the consumable electrode type.
314, Electric Lamp and Discharge Devices: Consumable Electrodes, for structure to support and feed electrodes of the consumable electrode type, and particularly 60, for consumable electrodes not of the electrical welding type.
