GB1427007A - Gas detection - Google Patents
Gas detectionInfo
- Publication number
- GB1427007A GB1427007A GB1681272A GB1681272A GB1427007A GB 1427007 A GB1427007 A GB 1427007A GB 1681272 A GB1681272 A GB 1681272A GB 1681272 A GB1681272 A GB 1681272A GB 1427007 A GB1427007 A GB 1427007A
- Authority
- GB
- United Kingdom
- Prior art keywords
- disc
- line
- channels
- tube
- aligned
- 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
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Electron Tubes For Measurement (AREA)
Abstract
1427007 Valves DEFENCE SECRETARY OF STATE FOR 8 May 1973 [12 April 1972] 16812/72 Heading F2V [Also in Division G1] A multi-position valve assembly for use in vapour detection apparatus comprises two discs 12, 14 of glass-filled polytetrafluoroethylene and of specified dimensions, disc 12 being rotatable through a limited angle by means of lever 20 and disc 14 being fixed relative to a framework or casing, the contacting faces of the discs having in them channels providing three different flow paths through the valve corresponding to three positions of disc 12 attained when lines 52, 54, 56 on disc 12 are aligned with line 58 on disc 14. In the embodiment of the drawings, with disc 12 of Fig. 2A superimposed on disc 14 of Fig. 2B, and line 52 aligned with line 58, a first flow path for atmosphere to be tested comprises tube 34, channels 64, 66 (channel 66 containing a heatable platinum coil), 68 and 70 while simultaneously there is formed a carrier gas flow path through tube 38, channels 72, 74, 76 and 78; when line 54 is aligned with line 58 and the assembly is in its second position there is a carrier gas flow path through tube 38, channels 74, 80, 82, 84, 86 and 64 and tube 34 and also through channels 72, 74, 76, 78; when line 56 is aligned with line 58 and the assembly is in its third position, there is a carrier gas flow path through tube 38, channels 72, 74, 80-86 and 64, 66, 76, 78. Lever 20 may be operated by means of a mechanized connection between the lever and a switch (26) used to close an electrical circuit for heating coil 22. The apparatus as a whole may be operated automatically using battery driven electric motor or spring-power.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1681272A GB1427007A (en) | 1972-12-12 | 1972-12-12 | Gas detection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1681272A GB1427007A (en) | 1972-12-12 | 1972-12-12 | Gas detection |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1427007A true GB1427007A (en) | 1976-03-03 |
Family
ID=10084115
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1681272A Expired GB1427007A (en) | 1972-12-12 | 1972-12-12 | Gas detection |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1427007A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2456320A1 (en) * | 1979-05-09 | 1980-12-05 | Conoco Inc | METHOD AND DEVICE FOR ANALYZING GAS PRODUCED BY PYROLYSIS |
EP0021518A1 (en) * | 1979-06-21 | 1981-01-07 | Pye (Electronic Products) Limited | Trace vapour detector |
EP0055624A1 (en) * | 1980-12-31 | 1982-07-07 | Geoffrey William Ball | Gas monitor |
CN107436252A (en) * | 2017-09-11 | 2017-12-05 | 中国科学院大气物理研究所 | Adsorption tube automatic coating and the device and method of activation |
-
1972
- 1972-12-12 GB GB1681272A patent/GB1427007A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2456320A1 (en) * | 1979-05-09 | 1980-12-05 | Conoco Inc | METHOD AND DEVICE FOR ANALYZING GAS PRODUCED BY PYROLYSIS |
EP0021518A1 (en) * | 1979-06-21 | 1981-01-07 | Pye (Electronic Products) Limited | Trace vapour detector |
EP0055624A1 (en) * | 1980-12-31 | 1982-07-07 | Geoffrey William Ball | Gas monitor |
CN107436252A (en) * | 2017-09-11 | 2017-12-05 | 中国科学院大气物理研究所 | Adsorption tube automatic coating and the device and method of activation |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |