Latham loop (original) (raw)
El bucle de Latham és un dispositiu simple, present tant en la majoria de les càmeres de cinema com en gairebé tots els aparells de projecció cinematogràfica, destinat a isolar la zona d'arrossegament intermitent de la pel·lícula de la part de desenrotllament continu, a fi d'evitar-ne la ruptura sota l'esforç de tracció.
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| dbo:abstract | El bucle de Latham és un dispositiu simple, present tant en la majoria de les càmeres de cinema com en gairebé tots els aparells de projecció cinematogràfica, destinat a isolar la zona d'arrossegament intermitent de la pel·lícula de la part de desenrotllament continu, a fi d'evitar-ne la ruptura sota l'esforç de tracció. (ca) The Latham Loop is used in film projection and image capture. It isolates the filmstrip from vibration and tension, allowing movies to be continuously shot and projected for extended periods. Invention of the Latham loop is usually credited to film pioneers William Kennedy Laurie Dickson and Eugene Lauste. Both men worked with Woodville Latham, developing a motion picture camera and projector in 1895. Dickson later acknowledged Lauste as inventor of the loop, though rival claims were made in support of another Latham associate, engineer Enoch J. Rector, who used the technology to shoot an hour-and-a-half-long documentary film, The Corbett-Fitzsimmons Fight, in 1897. Woodville Latham applied for a patent on June 1, 1896. In his patent application, Latham wrote, In order that these parts [of the film projector] may operate as described, it is essential that the loop of slack film be maintained at all times ready for the intermittingly-acting device and also that the slack-manipulating and the intermittingly-moving devices be positively driven by mechanism which will absolutely insure the presence of the slack and the accurate movement of the film. The reason these parts and their arrangement and method of operation are such important and valuable features of the invention is because their action is necessarily exceedingly rapid, and if the intermittingly-feeding mechanism were heavy, so as to have much inertia, or if any considerable portion of the film or either of the reels which support it were stopped and started at each transition from picture to picture there would be such strain brought to bear on the sprocket-holes in the film as would speedily tear it adjacent to such holes, thus ruining it... By 1905, virtually all motion picture projectors used the Latham loop. The patent expired in 1913. When Thomas Edison excluded his competitor Biograph from licensing Edison's key motion picture patents in 1907, Biograph retaliated by purchasing the patent for the Latham loop. In a patent infringement suit by Edison against Biograph, a federal court upheld the validity of the Latham patent. (en) La boucle de Latham est un dispositif simple, présent aussi bien dans la plupart des caméras de cinéma que dans presque tous les appareils de projection cinématographique, destiné à isoler la zone à déroulement intermittent de la pellicule de la zone à déroulement continu, afin d'éviter sa rupture sous l’effort de traction. (fr) El bucle de Latham es un dispositivo simple, presente tanto en la mayoría de las cámaras de cine como en casi todos los aparatos de proyección cinematográfica, destinado a aislar la zona de arrastre intermitente de la película de la parte de desarrollo continuo, con objeto de evitar la ruptura bajo el esfuerzo de tracción. (es) Петля Латама — название свободной петли, которую киноплёнка делает в лентопротяжном механизме большинства типов киноаппаратуры перед входом в скачковый механизм. Петля изолирует ветви лентопротяжного тракта, в которых плёнка движется непрерывно, от участка прерывистого перемещения, предотвращая обрыв и повреждения перфорации. Для поддержания постоянного размера петли перед ней устанавливается тянущий зубчатый барабан, равномерно сматывающий киноплёнку с подающего рулона. (ru) |
| dbo:thumbnail | wiki-commons:Special:FilePath/Meo_5_Movie_projector_mechanismus.jpg?width=300 |
| dbo:wikiPageExternalLink | https://pictureshowman.com/the-latham-loop-a-loop-of-film-that-freed-an-industry/ http://www.google.com/patents%3Fid=EAJmAAAAEBAJ https://www.theatlantic.com/technology/archive/2017/01/latham-loop/512687/ |
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| dbo:wikiPageLength | 3048 (xsd:nonNegativeInteger) |
| dbo:wikiPageRevisionID | 1048338902 (xsd:integer) |
| dbo:wikiPageWikiLink | dbr:Eugene_Lauste dbc:Film_and_video_technology dbr:Enoch_J._Rector dbr:Thomas_Edison dbr:William_Kennedy_Laurie_Dickson dbr:Documentary_film dbr:Film_projector dbr:The_Atlantic dbr:The_Corbett-Fitzsimmons_Fight dbr:Woodville_Latham dbr:American_Mutoscope_and_Biograph_Company dbr:File:Meo_5_Movie_projector_mechanismus.jpg |
| dbp:wikiPageUsesTemplate | dbt:Reflist dbt:Film-tech-stub |
| dct:subject | dbc:Film_and_video_technology |
| rdfs:comment | El bucle de Latham és un dispositiu simple, present tant en la majoria de les càmeres de cinema com en gairebé tots els aparells de projecció cinematogràfica, destinat a isolar la zona d'arrossegament intermitent de la pel·lícula de la part de desenrotllament continu, a fi d'evitar-ne la ruptura sota l'esforç de tracció. (ca) La boucle de Latham est un dispositif simple, présent aussi bien dans la plupart des caméras de cinéma que dans presque tous les appareils de projection cinématographique, destiné à isoler la zone à déroulement intermittent de la pellicule de la zone à déroulement continu, afin d'éviter sa rupture sous l’effort de traction. (fr) El bucle de Latham es un dispositivo simple, presente tanto en la mayoría de las cámaras de cine como en casi todos los aparatos de proyección cinematográfica, destinado a aislar la zona de arrastre intermitente de la película de la parte de desarrollo continuo, con objeto de evitar la ruptura bajo el esfuerzo de tracción. (es) Петля Латама — название свободной петли, которую киноплёнка делает в лентопротяжном механизме большинства типов киноаппаратуры перед входом в скачковый механизм. Петля изолирует ветви лентопротяжного тракта, в которых плёнка движется непрерывно, от участка прерывистого перемещения, предотвращая обрыв и повреждения перфорации. Для поддержания постоянного размера петли перед ней устанавливается тянущий зубчатый барабан, равномерно сматывающий киноплёнку с подающего рулона. (ru) The Latham Loop is used in film projection and image capture. It isolates the filmstrip from vibration and tension, allowing movies to be continuously shot and projected for extended periods. Invention of the Latham loop is usually credited to film pioneers William Kennedy Laurie Dickson and Eugene Lauste. Both men worked with Woodville Latham, developing a motion picture camera and projector in 1895. Dickson later acknowledged Lauste as inventor of the loop, though rival claims were made in support of another Latham associate, engineer Enoch J. Rector, who used the technology to shoot an hour-and-a-half-long documentary film, The Corbett-Fitzsimmons Fight, in 1897. (en) |
| rdfs:label | Bucle de Latham (ca) Bucle de Latham (es) Boucle de Latham (fr) Latham loop (en) Петля Латама (ru) |
| owl:sameAs | freebase:Latham loop yago-res:Latham loop wikidata:Latham loop dbpedia-ca:Latham loop dbpedia-es:Latham loop dbpedia-fr:Latham loop dbpedia-ru:Latham loop https://global.dbpedia.org/id/4q8sk |
| prov:wasDerivedFrom | wikipedia-en:Latham_loop?oldid=1048338902&ns=0 |
| foaf:depiction | wiki-commons:Special:FilePath/Meo_5_Movie_projector_mechanismus.jpg |
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