http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-910359-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e9ec95f75bc5dcc8f2c6f36fd3ee1ca6 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N27-66 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N7-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01L21-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01M3-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N27-70 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01N27-62 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N27-70 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01M3-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N7-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01L21-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N27-66 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N27-62 |
| filingDate | 1959-07-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1962-11-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-910359-A |
| titleOfInvention | Improvements in or relating to gas detection devices |
| abstract | A gas detector comprises a sensing element having a multiplicity of thin-walled very small diameter non-porous glass tubes, means to admit the gas to be tested to the interior of the tubes or to contact said gas with the exterior of said tubes, means to collect gas diffusing through said tubes and a detector element within or connected to said collecting means, adapted to detect the presence of a gas diffusing through <PICT:0910359/III/1> said tubes. As shown in Fig. 1, the sensing device comprises a bundle of tubes 6 sealed at one end into a floating head 9 of epoxy resin and passing through a gas tight seal 10 to open at the other end into an ionization manometer. The glass tubes preferably comprise at least a total aggregate of 75% of one or more of SiO2, B2O3, Al2O3 and P2O5. The tubes may have an outside diameter of 1-50 mils and a wall thickness of 0,2-10 mils and are housed in a metal jacket 1 having a heating element 4, the gas to be tested being admitted at 2 and withdrawn at 3. Gases such as helium, hydrogen, deuterium, tritium and neon, of small atomic radii, which diffuse through the glass tubes (if necessary at an elevated temperature) pass into an ionisation manometer having a filament 17 for ionizing the gas and an anode and cathode 18 and 19 between which the ionizing current to be detected flows, said current being amplified prior to measurement if so desired. Temperatures of at least 165 DEG C. for H2, at least 270 DEG C. for Ne are referred to and temperatures up to 800 DEG C. for silica tubing are specified. It is also stated that two or more sensing elements are selected temperatures or one sensing element at varying temperatures may be employed with a detector to detect any one of the gases mentioned in a gax mixture. A vacuum of 10-3-10-6 is maintained in the ionization manometer by means of a diffusion pump attached to outlet 15. As an alternative arrangement, the gas to be tested may be admitted to the inside of the glass tubes and diffuse outwardly for detection. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6637253-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2138147-A |
| priorityDate | 1958-08-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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