Gas sensor with closely wound termination springs
US4210510A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1979 |
| Grant date | Jul 1, 1980 |
| Priority date | — |
| Expiry date | Jul 25, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4075
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The helical compression spring which completes the electrical circuit between the interior surface of a tubular ion conductive solid electrolyte gas sensing element closed at one end, and an electrical terminal retained in spaced relation to the open end of the sensing element is close wound adjacent the end exposed to temperatures which would cause open coils of the spring to relax and has a compressed length sufficient to maintain a preselected minimum force against the terminal and sensing element over the full range of operating temperatures to which the sensor is exposed. In an alternate embodiment of the invention, this spring is provided with a closely wound portion at each end so that the sensor can be assembled by inserting the spring either end first.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.