http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1004002-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3c4bdf8115b934869190765580b90dea |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01B9-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01B9-02 |
| filingDate | 1961-09-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1965-09-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1004002-A |
| titleOfInvention | A graduating apparatus of optical interference type |
| abstract | 1,004,002. Photo-electrically controlled dividing engines. AGENCY OF INDUSTRIAL SCIENCE AND TECHNOLOGY, MINISTRY OF INTERNATIONAL TRADE & INDUSTRY. Sept. 19, 1961 [Sept.20, 1960], No. 33450/61. Headings G1A and G1X. A dividing engine in which graduations are marked withthe aid of an interferometer is provided with a further interferometer which maintains its own path length substantially constant. The scale blank to be divided, 28, is mounted on a carriage 29 which also carries a corner reflector 9 and is moved by driving means 34. Light from a krypton 86 light source is collimated and monochromated before being split by a device 6 to prodice two beams incident respectively on the reflector 9 and a similar fixed reflector 10. The reflected beams interfere on recombination at device 6, and the fringes produced are counted by a photo-cell 14 and counter 33. When a predetermined number of fringes have been counted, driving means 34 is stopped and the graduating mechanism 27 actuated. The further interferometer 19 comprises half silvered plates inclined at a very slight angle and separated by the same material as constitutes the scale blank 28. Light from a mercury lamp 15 forms fringes by multiple reflections in 19. A mercury light source is used and the distance between the plates is chosen so that all the principal mercury lines in the range of sensitivity of the Sb-Cs photo-cells 23 and 24 produce coincidental fringe at the centre of prism 22. Any difference in output between the cells 23 and 24 controls a pressurizer 32 to keep the fringe centred on the prism 22. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-1255931-B |
| priorityDate | 1960-09-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 15.