Combined pressure gauge-transmitter
US4502334A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1983 |
| Grant date | Mar 5, 1985 |
| Priority date | — |
| Expiry date | Aug 4, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/0032
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A Bourdon tube adapted for connection to a source of fluid pressure operates both a mechanically driven gauge pointer and an optical-electronic transmitter for providing operatively parallel output signals corresponding to values of pressure incurred by the fluid source. Simultaneously operative from the displaceable end of the Bourdon tube are both a mechanical movement for effecting amplified displacement of the pointer relative to a dial plate and an opaque vane displaceable within the transmitter between a photoemitter and a pair of photosensors. Circuitry in the transmitter responsive to discrete changes in light interruption between the vane and one of the photosensors emits a signal current corresponding to the pressure value at any given position of the vane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.