Low-temperature comparison calibrator for thermometers
US7708459B2 · kind B2 · utility
5Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2007 |
| Grant date | May 4, 2010 |
| Priority date | — |
| Expiry date | Oct 22, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K2203/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature varying low-temperature comparative calibration including a vacuum jacket, a comparative calibration block in the vacuum jacket which is formed of a material of a high heat conductivity and which is maintained at a fixed temperature by a refrigerator or a heater, a reference thermometer housing portion in the comparative calibration block in which a reference thermometer is mounted, and an insertion hole in the comparative calibration block through which a calibration target thermometer is inserted from outside the vacuum jacket via an introduction pipe. The introduction pipe is filled with heat exchange gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.