Pressure measuring apparatus using vibratable wire
US4329775A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1979 |
| Grant date | May 18, 1982 |
| Priority date | — |
| Expiry date | May 3, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4908
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The method of making a force-responsive instrument of the type including a tensioned wire of round cross-section to be vibrated perpendicular to the wire axis, wherein said instrument includes field-producing magnetic means operable with said wire to induce vibration; said method including the steps of: PA1 positioning said wire in a magnetic field directed perpendicularly to the wire axis; PA1 vibrating said wire by electrical means connected to the wire and arranged to develop interaction with said magnetic field; PA1 developing an electrical signal proportionately responsive to the magnitude of vibrations of said wire; PA1 effecting relative rotation between said wire axis and said magnetic field while maintaining constant the intensity of said magnetic field; PA1 making measurements of the amplitude of the signal developed by said wire; PA1 determining from said measurements the position of said wire relative to said magnetic field providing maximum signal amplitude; and PA1 fixing said wire in said instrument in said position relative to said magnetic means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.