This HTML5 document contains 53 embedded RDF statements represented using HTML+Microdata notation.

The embedded RDF content will be recognized by any processor of HTML5 Microdata.

Namespace Prefixes

PrefixIRI
dcthttp://purl.org/dc/terms/
dbohttp://dbpedia.org/ontology/
dbpedia-glhttp://gl.dbpedia.org/resource/
n18http://www.earlytelevision.org/
foafhttp://xmlns.com/foaf/0.1/
n12https://books.google.com/
n23https://global.dbpedia.org/id/
n22http://www.televisionexperimenters.com/
dbthttp://dbpedia.org/resource/Template:
rdfshttp://www.w3.org/2000/01/rdf-schema#
n20http://www.tvhistory.tv/
freebasehttp://rdf.freebase.com/ns/
n8https://query.nytimes.com/gst/
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
owlhttp://www.w3.org/2002/07/owl#
wikipedia-enhttp://en.wikipedia.org/wiki/
provhttp://www.w3.org/ns/prov#
dbchttp://dbpedia.org/resource/Category:
dbphttp://dbpedia.org/property/
xsdhhttp://www.w3.org/2001/XMLSchema#
wikidatahttp://www.wikidata.org/entity/
goldhttp://purl.org/linguistics/gold/
dbrhttp://dbpedia.org/resource/
n19https://web.archive.org/web/20110716203802/http:/www.televisionexperimenters.com/

Statements

Subject Item
dbr:Scophony
rdfs:label
Scophony
rdfs:comment
Scophony was a sophisticated mechanical television system developed in Britain by Scophony Limited. A black and white image was produced by modulating a bright light using a piezoelectric crystal vibrating a liquid lens and the scanning motion was created using mirrors mounted on high-speed rotating drums to project an image upon a screen. Several of the theater systems were installed and operated successfully but none of the receivers were sold as production was halted due to the impending war. Scophony's system used several innovative devices:
foaf:isPrimaryTopicOf
wikipedia-en:Scophony
dct:subject
dbc:Ferranti dbc:History_of_science_and_technology_in_the_United_Kingdom dbc:History_of_television dbc:Television_technology
dbo:wikiPageID
5393388
dbo:wikiPageRevisionID
1026351551
dbo:wikiPageWikiLink
dbr:Black_and_white dbr:Ferranti dbr:J.H._Jeffree dbr:EKCO dbr:Kerr_effect dbr:Jeffree_cell dbc:History_of_science_and_technology_in_the_United_Kingdom dbr:Piezoelectricity dbc:Television_technology dbr:Mechanical_television dbr:441_line dbr:405_line dbr:George_William_Walton dbr:441-line_television_system dbr:William_Stephenson dbr:Solomon_Sagall dbr:Great_Britain dbr:405-line_television_system dbr:Kerr_cell dbr:Joshua_Sieger dbr:Synchronization_(alternating_current) dbr:Radiolympia dbr:Ulises_Armand_Sanabria dbc:Ferranti dbc:History_of_television
dbo:wikiPageExternalLink
n8:fullpage.html%3Fres=9807E6D7173AF937A1575AC0A9679C8B63 n12:books%3Fid=iyQDAAAAMBAJ&pg=PA113 n18:yanczer_scophony.html n19:scophony.html n20:1938-Scophony-UK.htm n22:scophony.html
owl:sameAs
wikidata:Q7434449 freebase:m.0djvbj dbpedia-gl:Scophony n23:4v4sS
dbp:wikiPageUsesTemplate
dbt:Cite_web dbt:Convert dbt:Video-tech-stub dbt:Cite_magazine dbt:Reflist
dbo:abstract
Scophony was a sophisticated mechanical television system developed in Britain by Scophony Limited. A black and white image was produced by modulating a bright light using a piezoelectric crystal vibrating a liquid lens and the scanning motion was created using mirrors mounted on high-speed rotating drums to project an image upon a screen. The company Scophony Limited was established by entrepreneur Solomon Sagall in the early 1930s to exploit the patents of inventor George William Walton and William Stephenson. In 1932, Ferranti invested £3,500 in the company, however in 1934 Ferranti turned down the option to invest a further £10,000 to re-structure Scophony Limited, and in 1935 EKCO replaced Ferranti as the company's main investor. In 1938, the Scophony company demonstrated three types of 405 line mechanical television receivers at the Radiolympia exhibition in London: a home receiver, with a picture area of approximately 24 in × 20 in (61 cm × 51 cm) and two systems intended for theater operation, one producing a 6 ft × 5 ft (180 cm × 150 cm) image and the other a 9 ft × 12 ft (270 cm × 370 cm) image. Several of the theater systems were installed and operated successfully but none of the receivers were sold as production was halted due to the impending war. Scophony's system used several innovative devices: * A split focus optical system invented by Walton, developed specially for use with mirror scanning systems. Light beams were focused by crossed cylindrical lenses, concentrating the light in two planes. This allowed the use of smaller lenses and mirrors, thus reducing size and cost. This was particularly important to Scophony since they intended to produce extremely large images. * A light modulator developed by J.H. Jeffree in 1934 and known as the Jeffree cell, a cell filled with a transparent fluid which used mechanical oscillations to modulate the light beam passing through it. It was a substantial improvement over the previous Kerr cell, 200 times as much modulated light being available at the screen. * High speed synchronous motors which could be relied on for 1000 hours of use, some lasting longer without noticeable wear. The Scophony system used two: a low speed scanner which operated at 240 RPM and a high speed scanner which ran at 30,375 RPM for 405 line transmissions or 39,690 RPM for the American 441 line system. Scophony Limited operated in Britain up to WWII and then in the USA. "Of all the electro-mechanical television techniques invented and developed by the mid-1930s, the technology known as Scophony had no rival in terms of technical performance." In November 1948, Scophony merged with John Logie Baird Ltd to become Scophony-Baird; offering for sale a line of four Baird-branded television sets the following year.
prov:wasDerivedFrom
wikipedia-en:Scophony?oldid=1026351551&ns=0
dbo:wikiPageLength
4714
gold:hypernym
dbr:System