Spiral configuration of electrodes and dielectric material for sensing an environmental property
US4858063A · kind A · utility
20Cited by
7References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1987 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Dec 31, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/225
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A reliable moisture-indicating capactive sensor is provided with wire electrodes at least one of which includes a coating of moisture-absorbing dielectric material by spirally twisting the wire electrodes about each other, thereby establishing a pair of electrodes in contact with opposite surfaces of a layer of dielectric material, and assuring consistent contact of each electrode with the dielectric material despite changes in environmental conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.