http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-191223775-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d647e846645953f86e9ba89e7f5ead3d |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03C27-046 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C27-04 |
| filingDate | 1912-10-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1913-08-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1913-08-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-191223775-A |
| titleOfInvention | Improvements in and relating to Evacuated Vitreous Containers having Sealed-in Conductors. |
| abstract | 23,775. British Thomson-Houston Co., [General Electric Co.]. Oct. 17. Leading-in wires; residual gases. - A composite wire, having the same aggregate expansion as the vitreous material into which it is sealed, consists of a base-metal core sheathed in a metal of which the oxide is easily soluble in the vitreous material. Such wires can be sealed in without special precautions. The core may consist of tungsten, molybdenum, or an alloy of 54 parts of iron and 46 parts of nickel, and the coating may be of copper, cobalt, or an alloy of the two, these parts respectively having smaller and larger expansion-coefficients than lead glass, such as is used for incandescent lamps, vapour electric lamps, rectifiers, &c. A tungsten wire of 0À01 inch radius may have a copper coating 0À0028 inch thick. The wire may be coated by electrolysis, by depositing a thin coating, heating to 1200‹ C. in hydrogen to unite or alloy it with the core, and then further plating to the required thickness. The wire may be moved rapidly, and the bath maycontain materials such as gelatine, glue, salt, or ferric chloride. In another method, a rod or wire of the core metal is coated thinly with silver or an alloy of silver and copper to act as a solder, either by electrolysis or by applying foil, and a sheath of the coating-metal is compressed on to it by rolling, swaging, or drawing. The whole is then heated to 50 degrees above the melting-point of the intermediate layer, and is afterwards drawn down. Wires with tungsten cores are suitable for lamps such as that shown in Fig. 1, containing materials yielding active vapours, such as potassium iodide, thallium chloride, and tungsten oxychloride. The coating-metal, which would be acted upon, is dissolved from the parts 7 inside the lamp. The active material may be contained in a hollow stem 8. |
| priorityDate | 1912-10-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 37.