Pneumatic infrared ray detector for use in gas analyzer
US5362967A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1993 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | Sep 24, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/37
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pneumatic infrared ray detector for use in a gas analyzer provided with a gas-slowly leaking mechanism capable of not only controlling a quantity of gas leaked in high accuracy but also increasing a range capable of controlling said quantity of gas leaked is provided. A body is provided with gas chambers and a detecting gas chamber and the respective gas chambers are communicated with said detecting gas chamber through gas passages. A ring-shaped leak-controlling sheet on the bottom surface of the detecting gas chamber is provided with a groove-like gas-leaking passage between the inner and outer circumferential edges thereof and a ring-shaped diaphragm and a vibrating diaphragm are built up on said leak-controlling sheet to be fixedly pressurized by means of a cover plate through a pressurizing member and a plate spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.