GB785302A - Improvements in or relating to means for the estimation of small quantities of gaseous impurities in rare gases - Google Patents
Improvements in or relating to means for the estimation of small quantities of gaseous impurities in rare gasesInfo
- Publication number
- GB785302A GB785302A GB1828954A GB1828954A GB785302A GB 785302 A GB785302 A GB 785302A GB 1828954 A GB1828954 A GB 1828954A GB 1828954 A GB1828954 A GB 1828954A GB 785302 A GB785302 A GB 785302A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- photo
- cell
- discharge
- discharge tube
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/66—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light electrically excited, e.g. electroluminescence
- G01N21/69—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light electrically excited, e.g. electroluminescence specially adapted for fluids, e.g. molten metal
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
785,302. Photo-electric gas analyses. BRITISH OXYGEN CO., Ltd. June 22, 1955 [June 22, 1954; Sept. 30, 1954], Nos. 18289/54 and 28265/54. Drawings to Specification. Class 40 (3). [Also in Group XL (a) Small quantities of gaseous impurities in a rare gas are estimated by passing an electric discharge through the gas at low pressure and measuring photo-electrically the variation in colour and/or brightness of the discharge. The gas is passed through a discharge tube (see Group XL (a)) by using a vacuum pump connected to one end thereof, a fine adjustment valve being adapted to maintain the pressure within the tube at a predetermined low value. The photo-electric means comprises one or more photo-cells contained with the discharge tube in a light-tight casing, lined with reflecting or diffusing material and the output from the cell(s) is measured by a suitable instrument which may be calibrated so as to give a direct reading of the amount of impurity in the gas. Variable shunts may be employed to adjust the instrument sensitivity. The current generated in a cell by the passage of pure gas through the discharge tube may be neutralized by using a further cell, exact balance being obtained by adjusting a resistance in series. Compensation for temperature variation may be effected by connecting a thermistor in a Wheatstone bridge with three fixed resistance arms, applying to the bridge an e.m.f. proportional to the impurity concentration and adding the out-of-balance current to the photo-cell output. Sensitivity may be increased by adding to the rare gas a small known amount of another impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1828954A GB785302A (en) | 1954-06-22 | 1954-06-22 | Improvements in or relating to means for the estimation of small quantities of gaseous impurities in rare gases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1828954A GB785302A (en) | 1954-06-22 | 1954-06-22 | Improvements in or relating to means for the estimation of small quantities of gaseous impurities in rare gases |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB785302A true GB785302A (en) | 1957-10-23 |
Family
ID=10109905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1828954A Expired GB785302A (en) | 1954-06-22 | 1954-06-22 | Improvements in or relating to means for the estimation of small quantities of gaseous impurities in rare gases |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB785302A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115598266A (en) * | 2022-12-12 | 2023-01-13 | 山东非金属材料研究所（Cn） | Inert gas analysis method |
-
1954
- 1954-06-22 GB GB1828954A patent/GB785302A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115598266A (en) * | 2022-12-12 | 2023-01-13 | 山东非金属材料研究所（Cn） | Inert gas analysis method |
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