IPC Definitions - January 01, 2012

G01K - Definition fr

Definition statement

This subclass covers:

Apparatus or methods for measuring temperature, i.e. thermometers. The following types of thermometers are therefore covered, the list being non exhaustive:

Testing or calibrating of thermometers.

Apparatus or methods for measuring quantity of heat, i.e. calorimeters.

Testing or calibrating of calorimeters.

Thermally-sensitive elements not otherwise provided for.

Relationship between large subject matter areas

Subclass G01K covers temperature measurements per se, except when performed by radiation pyrometry, in which case the subject matter is classified in subclass G01J.

When temperature measurements are used for the investigation of material properties (e.g. flaw detection), that subject matter falls under the scope of G01N 25/00.

For subject matter relating to sensing temperature changes for compensating measurements of other variables or for compensating readings of instruments for variations in temperature, see G01D or relevant subclass for variable measured.

References relevant to classification in this subclass

This subclass does not cover:

Radiation pyrometry

G01J 5/00
Examples of places where the subject matter of this class is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Measuring temperature of human body parts for diagnostic purposes

A61B 5/01

Heat-sensitive devices for control of fire-fighting equipment

A62C 37/00

Heat-sensitive sheets for use in thermography

B41M 5/00

Measuring temperature specially adapted to boreholes or wells

E21B 47/06

Arrangements of temperature sensing elements for regulating or controlling in gas turbines

F01D 17/08

Use of thermally-sensitive elements in systems controlling or regulating combustion

F23N 5/02-F23N 5/14

Flow measurement by thermal means

G01F 1/68

Investigating or analysing materials by use of thermal means, e.g. by calorimetry

G01N 25/00, G01N 25/20

Meteorology; Indication of human comfort

G01W 1/00, G01W 1/17

Temperature control

G05D 23/00

Fire alarms

G08B 17/00-G08B 19/00

Thermally-sensitive members for thermally-actuated switches

H01H 37/00

Temperature sensing in car batteries

H01M 10/48

Control or measuring devices, e.g. for temperature of metal, in the art of manufacture of metal sheets, wires, rods, tubes or profiles

B21C 31/00

Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass, in the art of casting of metals

B22D 2/00

Measuring, controlling or regulating of temperature in injection moulding

B29C 45/78

Indicating devices concerning coolant temperature, in the art of cooling of machines, engines, or internal-combustion engines

F01P 11/16

Structural combination of nuclear reactor elements with sensitive instruments for measuring temperature

G21C 17/112

Informative references

Attention is drawn to the following places, which may be of interest for search:

Thermometer holders specially adapted to veterinary purposes

A61D 13/00

Ambient temperature regulation specially adapted to passengers or goods spaces in vehicles

B60H 1/00

Heating in general

F24B, F24C, F24D

Sensing temperature changes for compensating measurements of other variables or for compensating readings of instruments for variations in temperature

G01D

Bimetallic elements

G12B 1/02

Compensating for the effects of temperature on instruments

G12B 7/00

Thermistors, i.e. thermo-resistors

H01C 7/00-H01C 7/04

Electrolytic temperature-sensitive devices

H01G 9/21

Peltier elements

H01L 23/38

Semiconductor or solid-state thermo-electric or thermo-magnetic devices

H01L 35/00, H01L 37/00

Glossary of terms

In this subclass, the following terms or expressions are used with the meaning indicated:

Thermometer

Includes thermally-sensitive elements not provided for in other subclasses.

Synonyms and Keywords

TTI

Time Temperature Integrator

PTAT

Proportional To Absolute Temperature

CTAT

Complementary To Absolute Temperature

NTC/PTC

Negative/Positive Temperature Coefficient

RTD

Resistance Temperature Detector

3-wire / 4-wire RTD's

Resistive temperature detectors with additional lead wire for compensation purposes

OTDR

Optical Time Domain Reflectometry

FBG

Fiber Bragg Grating

SAW/BAW

Surface/Bulk Acoustic Wave

HVAC

Heating Ventilation Air Conditioning

TAT/SAT

Total/Static Air Temperature (in aircrafts)