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Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Optical_comparator> ?p ?o }

• Optical_comparator abstract "An optical comparator (often called just a comparator in context) is a device that applies the principles of optics to the inspection of manufactured parts. In a comparator, the magnified silhouette of a part is projected upon the screen, and the dimensions and geometry of the part are measured against prescribed limits. The measuring happens in any of several ways. The simplest way is that graduations on the screen, being superimposed over the silhouette, allow the viewer to measure, as if a clear ruler were laid over the image. Another way is that various points on the silhouette are lined up with the reticle at the centerpoint of the screen, one after another, by moving the stage on which the part sits, and a digital read out reports how far the stage moved to reach those points. Finally, the most technologically advanced methods involve software that analyzes the image and reports measurements. The first two methods are the most common; the third is newer and not as widespread, but its adoption is ongoing in the digital era. The first commercial comparator was developed by James Hartness and Russell W. Porter. Hartness' long-continuing work as the Chairman of the U.S.'s National Screw-Thread Commission led him to apply his familiarity with optics (from his avocations of astronomy and telescope-building) to the problem of screw thread inspection. The Hartness Screw-Thread Comparator was for many years a profitable product for the Jones and Lamson Machine Company, of which he was president.In subsequent decades optical comparators have been made by many companies and have been applied to the inspection of many kinds of parts. Today they may be found in many machine shops.The idea of mixing optics and measurement, and the use of the term comparator for metrological equipment, had existed in other forms prior to Hartness's work; but they had remained in realms of pure science (such as telescopy and microscopy) and highly specialized applied science (such as comparing master measuring standards). Hartness's comparator, intended for the routine inspection of machined parts, was a natural next step in the era during which applied science became widely integrated into industrial production.".
• Optical_comparator thumbnail HartnessComparator.jpg?width=300.
• Optical_comparator wikiPageID "15939976".
• Optical_comparator wikiPageLength "3628".
• Optical_comparator wikiPageOutDegree "20".
• Optical_comparator wikiPageRevisionID "627549371".
• Optical_comparator wikiPageWikiLink Astronomy.
• Optical_comparator wikiPageWikiLink Category:Manufacturing.
• Optical_comparator wikiPageWikiLink Category:Metalworking_measuring_instruments.
• Optical_comparator wikiPageWikiLink Category:Metrology.
• Optical_comparator wikiPageWikiLink Digital_read_out.
• Optical_comparator wikiPageWikiLink Engineering_tolerance.
• Optical_comparator wikiPageWikiLink File:HartnessComparator.jpg.
• Optical_comparator wikiPageWikiLink Graduation_(instrument).
• Optical_comparator wikiPageWikiLink Inspection.
• Optical_comparator wikiPageWikiLink James_Hartness.
• Optical_comparator wikiPageWikiLink Metrology.
• Optical_comparator wikiPageWikiLink Microscopy.
• Optical_comparator wikiPageWikiLink Optics.
• Optical_comparator wikiPageWikiLink Reticle.
• Optical_comparator wikiPageWikiLink Russell_W._Porter.
• Optical_comparator wikiPageWikiLink Screw_thread.
• Optical_comparator wikiPageWikiLink Shadowgraph.
• Optical_comparator wikiPageWikiLink Telescope.
• Optical_comparator wikiPageWikiLink Telescopy.
• Optical_comparator wikiPageWikiLink File:Optical_comparator_J_and_L_001_with_DRO.jpg.
• Optical_comparator wikiPageWikiLinkText "Optical comparator".
• Optical_comparator wikiPageWikiLinkText "comparators".
• Optical_comparator wikiPageWikiLinkText "optical comparator".
• Optical_comparator hasPhotoCollection Optical_comparator.
• Optical_comparator wikiPageUsesTemplate Template:Metalworking_navbox.
• Optical_comparator wikiPageUsesTemplate Template:Reflist.
• Optical_comparator wikiPageUsesTemplate Template:Roe1937.
• Optical_comparator subject Category:Manufacturing.
• Optical_comparator subject Category:Metalworking_measuring_instruments.
• Optical_comparator subject Category:Metrology.
• Optical_comparator hypernym Device.
• Optical_comparator type Device.
• Optical_comparator type Instrument.
• Optical_comparator type Instrument.
• Optical_comparator type Science.
• Optical_comparator type Tool.
• Optical_comparator comment "An optical comparator (often called just a comparator in context) is a device that applies the principles of optics to the inspection of manufactured parts. In a comparator, the magnified silhouette of a part is projected upon the screen, and the dimensions and geometry of the part are measured against prescribed limits. The measuring happens in any of several ways.".
• Optical_comparator label "Optical comparator".
• Optical_comparator sameAs Profilni_projektor.
• Optical_comparator sameAs Proiettore_di_profili.
• Optical_comparator sameAs m.03qhqjh.
• Optical_comparator sameAs Profilni_projektor.
• Optical_comparator sameAs Q3447646.
• Optical_comparator sameAs Q3447646.
• Optical_comparator wasDerivedFrom Optical_comparator?oldid=627549371.
• Optical_comparator depiction HartnessComparator.jpg.
• Optical_comparator isPrimaryTopicOf Optical_comparator.