GB397815A - Improvements in and relating to gas detectors - Google Patents
Improvements in and relating to gas detectorsInfo
- Publication number
- GB397815A GB397815A GB13870/33A GB1387033A GB397815A GB 397815 A GB397815 A GB 397815A GB 13870/33 A GB13870/33 A GB 13870/33A GB 1387033 A GB1387033 A GB 1387033A GB 397815 A GB397815 A GB 397815A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chamber
- gas
- water
- tested
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/10—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing diffusion of components through a porous wall and measuring a pressure or volume difference
- G01N7/12—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing diffusion of components through a porous wall and measuring a pressure or volume difference the diffusion being followed by combustion or catalytic oxidation
Abstract
<PICT:0397815/III/1> In gas detectors of the kind comprising a chamber with porous walls through which the gas diffuses, a heated filament within the chamber, and means for indicating a reduction in pressure in the chamber due to the combustion of inflammable constituents, the sensitivity of the apparatus is increased by cooling the chamber and optionally also by humidifying the gas to be tested. The Figure illustrates a device comprising a chamber with permeable side walls 16, an electrically heated filament 17, and a diaphragm device 38 for signalling reduction in pressure by closing electric contacts 44. The chamber is enclosed in a larger chamber 11 containing water and the gas to be tested is introduced through a porous plate 23 below the water level. A cooling coil 28 is provided in the inner chamber. In a modification the gas is humidified by surrounding part of the porous walls of the chamber with water or by conducting water to them by means of a wick.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US610853A US1979976A (en) | 1932-05-12 | 1932-05-12 | Gas detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB397815A true GB397815A (en) | 1933-08-31 |
Family
ID=24446683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13870/33A Expired GB397815A (en) | 1932-05-12 | 1933-05-12 | Improvements in and relating to gas detectors |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1979976A (en) |
| GB (1) | GB397815A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2934578A (en) * | 1959-02-20 | 1960-04-26 | Milton D Scheer | Process for low temperature hydrogenation of olefins |
| US3421362A (en) * | 1965-04-30 | 1969-01-14 | Davis Emergency Equipment Co I | Device or apparatus for detecting in air the presence of combustible or inflammable gases |
| US3933433A (en) * | 1974-12-18 | 1976-01-20 | Dynamation Enterprises, Inc. | Method and apparatus for gas detection |
| DE10130608A1 (en) * | 2001-06-26 | 2003-01-09 | Bsh Bosch Siemens Hausgeraete | Fire protection device for household appliances |
-
1932
- 1932-05-12 US US610853A patent/US1979976A/en not_active Expired - Lifetime
-
1933
- 1933-05-12 GB GB13870/33A patent/GB397815A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1979976A (en) | 1934-11-06 |
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