http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-140464-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4ddcb273a108a5d8472b335280098e06 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01J35-147 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01J35-064 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01J35-066 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J35-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01J35-14 |
| filingDate | 1920-03-19^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1921-05-12^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-140464-A |
| titleOfInvention | An improved x-ray tube |
| abstract | 140,464. Siemens & Halske Akt.- Ges. June 22, 1918, [Convention date]. Void [Published under Sect. 91 of the Act]. R÷ntgen-ray tubes.-The cathode is in the form of a metal plate heated to incandescence by the radiation of electrons directed on to its rear surface, so as to produce a uniform beam. In the arrangement shown in Fig. 1, a concave plate a is heated by discharge from an electrode d in a chamber c which is not so highly exhausted as the main tube b. In the arrangement shown in Fig. 2, a flat spiral filament e of tungsten is mounted behind a cup-shaped cathode a inside a metal cylinder g which forms one lead, and confines the heat produced by the filament so as to assist in heating the cathode, the other lead being spaced by a quartz sleeve h. One secondary winding of a transformer is connected between the cathode and the filament, and another winding serves for heating the filament. |
| priorityDate | 1918-06-22^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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