http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1530916-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_10ed6da739ce747c5acbf10148f3f851 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01F1-383 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01F1-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01F1-88 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01F1-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01F1-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01F1-86 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01F1-88 |
| filingDate | 1975-10-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1978-11-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1530916-A |
| titleOfInvention | Mass flow rate meter for a gaseous medium |
| abstract | 1530916 Measuring mass flow-rate electrically PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 28 Oct 1975 [6 Nov 1974] 44362/75 Heading G1N The mass flow-rate of a gas through a conduit is determined by passing the gas through a constriction shaped to ensure that the flow is laminar, and measuring the upstream and downstream pressures and the temperature of the gas, from which the mass flow-rate is calculated. As shown, Fig. 1a, the gas is fed through a constriction 4 comprising a plurality of coaxial circular cylinders spaced by corrugated strips 4b, Fig. 1b, supported by a central copper body 7 carrying two diaphragms 8, 9 consisting of silicon with resistance elements in a surface formed by boron diffusion. Diaphragm 8 is subjected on one face to the low pressure of an evacuated space 14 and on the other face to the upstream gas pressure P via space 15 and ducts 16, 17: diaphragm 9 is subjected on one face to the upstream pressure P and on the other face to the downstream pressure P-#P via space 18 and duct 20. Both diaphragms and their resistance elements are at the gas temperature T. The resistors on diaphragm 8 are connected in a first bridge circuit A Fig. 2, whose output is proportional to P/T and is the energizing voltage for a second bridge circuit B formed by the resistors on diaphragm 9, whose output is proportional to P/T x #P/T. It is shown that this is proportional to the mass flow-rate of the gas. |
| priorityDate | 1974-11-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 19.