(under the class definition) Subject matter for analyzing the light emitted from a body for properties such as intensity or color components as an indication of the temperature of the body.
(1) Note. The body may be heated in turn by another mass which may be either a gas, liquid, or solid; and the purpose here would be to ultimately determine the temperature of such a mass by the determination of its heating effect on the body.
(2) Note. Both temperature devices for metallurgical and photos:graphic use are included herein when the indication is in a unit of temperature.
SEE OR SEARCH THIS CLASS, SUBCLASS:
213, for photometry devices.
300+, for optical test devices which utilize a light dispersing system rather than filters to selectively detect various wavelengths of visible light.
402+, for shade or color optical test devices, and particularly subclass 404 for such test devices involving photography, and subclasses 416+ for such test devices which utilize one or more colored filters. SEE OR SEARCH CLASS
219, Electric Heating,
502, for the control of an electric heater by means of a light responsive temperature detector.
236, Automatic Temperature and Humidity Regulation,
15, for the measurement of the temperature of a furnace for the control of the heating of the furnace.
250, Radiant Energy,
226, for radiant energy detectors utilizing filters or dispersing means, and subclass 229 for light modulator detection systems.
266, Metallurgical Apparatus,
78+, and 99+, for metallurgical furnaces combined with
temperature determination means.
374, Thermal Measuring and Testing,
32, for measuring the total energy emitted from a source; and subclasses 121+ for subject matter similar to that in this subclass where the emitted radiation is not limited to light.
