US PATENT SUBCLASS 374 / 121
.~.~ By thermally emitted radiation

Current as of: June, 1999
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374 /   HD   THERMAL MEASURING AND TESTING

100  DF  TEMPERATURE MEASUREMENT (E.G., THERMOMETER) {13}
120  DF  .~ In spaced noncontact relationship to specimen {3}
121.~.~ By thermally emitted radiation {11}
122  DF  .~.~.~> By microwave arrangement
123  DF  .~.~.~> Transparent material measurement or compensation (e.g., spectral line, gas, particulate suspension
124  DF  .~.~.~> With scanning or temperature distribution display
125  DF  .~.~.~> With fluid flow purging device
126  DF  .~.~.~> Having emissivity compensating or specified radiating surface
127  DF  .~.~.~> Having significant frequency limitation or relationship (e.g., peak, ratio)
128  DF  .~.~.~> Having significant signal handling circuitry (e.g., linearizing, emissivity compensation)
129  DF  .~.~.~> Comparison with radiation reference standard
130  DF  .~.~.~> Optical system structure (e.g., lens) {1}
132  DF  .~.~.~> Sensor or mounting temperature control
133  DF  .~.~.~> Ambient temperature compensated (e.g., dummy sensor)

DEFINITION

Classification: 374/121

By thermally emitted radiation:

(under subclass 120) Subject matter wherein the temperature of a specimen is measured by measuring a parameter of the thermal radiation emitted therefrom.

SEE OR SEARCH CLASS

136, Batteries: Thermoelectric and Photoelectric,

213+, for a thermoelectric sensor for a thermoelectric radiation pyrometer absent processing and indicating circuitry.

250, Radiant Energy,

338+, for infrared radiation responsive circuitry absent a temperature indication.

356, Optics: Measuring and Testing,

43+, for a pyrometer specifically limited to the optical wavelength range of the electromagnetic spectrum.