http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1293717-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3492a7406879265b1f567f37d98dbbaf |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K11-71 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K11-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K11-59 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01J61-44 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K11-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K11-71 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K11-59 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J61-44 |
| filingDate | 1971-04-19^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1972-10-25^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1293717-A |
| titleOfInvention | Improved fluorescent lamps |
| abstract | 1293717 Uses of luminescence WESTING- HOUSE ELECTRIC CORP 19 April 1971 [19 Feb 1970] 23214/71 Heading C4S [Also in Division H1] A fluorescent lamp including Hg and an inert ionizable gas (e.g. argon at 3 torrs) and a blend of three phosphors, one with an emission peak at from 610 to 650 nm. (e.g. 630 nm.) and a broad-band emission of bandwidth >100 nm. (e.g. 135 nm.) at 50% intensity, a second phosphor with emission peak at from 435 nm. to 500 nm. (e.g. 440 nm.) and broad-band emission > 100 nm. (e.g. 125 nm.) at 50% intensity and a third phosphor having an emission peak at 510 to 540 nm. (e.g. 530 nm.) and a narrow band emission < 50 nm. (e.g. 45 nm.) at 50% intensity, the latter phosphor causing the colour of green objects to be accentuated with respect to their natural green colour, other objects being illuminated normally. The respective phosphors may be tin activated strontium magnesium orthophosphate, calcium tungstate, and manganese activated zinc silicate in wt. amounts 64 to 74%, 15 to 25%, and 10 to 15% or relative wt. proportions 69 : 19 : 12. Small amounts of other phosphors may be included for special colour rendition, e.g. 2% by wt. of any known long or short wavelength emitting phosphor. Phosphor preparations are described involving firing oxide starting materials. The third phosphor raw mix preferably includes plumbous fluoride and arsenic trioxide. Fig. 5 illustrates the composite spectrum in a 40 watt lamp including 8 grms. of phosphor, the sharp peaks being Hg resonance lines. Illumination of vegetable counters is exemplified. |
| priorityDate | 1970-02-19^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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