Vibratable-wire instrument having an improved temperature compensating technique
US4165652A · kind A · utility
12Cited by
4References
16Claims
0Family size
Inventors
Key dates
| Filing date | Jun 2, 1978 |
| Grant date | Aug 28, 1979 |
| Priority date | — |
| Expiry date | Jun 2, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/0013
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A differential-pressure measuring instrument includes a pair of diaphragms each subject to a respective fluid pressure. The diaphragms enclose a sealed chamber containing a fill-liquid surrounding a non-magnetic vibratable-wire which is tensioned in accordance with the applied differential pressure. A temperature compensating inductor is connected in parallel with the vibratable-wire to compensate for variationsin the vibrating frequency of the wire due to changes in the viscosity of the fill-liquid with temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.