http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-355728-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/H01J1-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01J17-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J1-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J17-04 |
| filingDate | 1930-04-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1931-08-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-355728-A |
| titleOfInvention | Improvements in and relating to electric discharge devices |
| abstract | 355,728. Discharge apparatus. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Steiner, H. C. ; James Street, Scotia, and Livingston, O. W. ; 841, Main Avenue, Schenectady, both in New York, U.S.A.) April 25, 1930, No. 12807. Convention date, April 26, 1929. [Class 39 (i).] The cathode of discharge devices operating with an arc-like discharge of flat or negative volt-ampere characteristic consists of one or more pairs of conductors 5, 6 of flat spiral form, the conductors of each pair being adjacent and coaxial and the heating currents flowing in opposite directions to neutralize the magnetic fields. The device may be of the type described in Specification 223,921, [Class 39 (i), Electric lamps, Arc &c.], with a grid determining the starting of the arc. The spirals 5, 6 are wound in the same direction and are of nickel band coated with barium carbonate and heated. The outer ends of the spirals are connected to leads 7, 8 for the cathodeheating current from a transformer 12 and the centres of the spirals are connected together and to a separate lead 13 for the arc current. This lead 13 is common to the input and output circuits 27, 29 and is connected to a heat-shield 23 for the pinch 2 and to a nickel cap 15 which retains the cathode heat and prevents emissive material passing from the cathode t the surrounding grid 3. The grid 3 is of nickel-chromium and the anode 4 of carbonized nickel. The envelope is filled with argon or other inert gas at 50-250 microns or with mercury vapour at a pressure below 1 mm. A getter 24 of magnesium strip is provided. The cathode may comprise m o r e than two pairs of spirals, the centres of the spirals being connected to the lead 13 and the ends to separate leads or in parallel to the same leads. |
| priorityDate | 1929-04-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 24.