Spectroscopic cell system having vented dual windows
US5120129A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1990 |
| Grant date | Jun 9, 1992 |
| Priority date | — |
| Expiry date | Oct 15, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/0389
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improvement upon spectroscopic cells of the type that have a single window sealed to each window opening of the cell body. The improvement is: (1) to position an additional window at each such opening, each such window being juxtaposed, spaced apart and biplanar with each original window so that there is a sealed space between each additional window and each original window; and (2) to position at least two passageways through the body of the cell, each such passageway in fluid communication with each of the above formed sealed spaces so that any leakage of a sample past the original seal is vented from the cell via one of the passageways to a detector to be detected. In a highly preferred embodiment of the present invention each such sealed space contains a spacer ring and the body is provided with additional passageways so that a purge fluid, such as nitrogen, can be flowed through the passageways and the sealed space to a flow through detector, such as a thermal conductivity detector, to detect any leakage of a fluid sample past one of the original seals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.