Interrupted DC operation of thermocouple vacuum gauge
US7451652B2 · kind B2 · utility
0Cited by
9References
16Claims
0Family size
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Key dates
| Filing date | Dec 7, 2006 |
| Grant date | Nov 18, 2008 |
| Priority date | — |
| Expiry date | Dec 7, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2205/03
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A direct current voltage to heat the sensor wire for powering and extracting a signal voltage from a thermocouple-type vacuum sensor. The direct current used produces a DC offset in the sensor output where the heating current flow is stopped for a short interval and the unbiased sensor voltage is then sampled and stored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.