File:Woman lying on big radio at convention 1923.jpg
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Summary[edit]
| Description |
English: A model, Rosalie Deneve, lying on top of a large mock-up of a radio receiver at a 1923 radio convention. Exhibit by Adams-Morgan Co.promoting their Paragon line of receivers at the 3rd Annual Convention of the 2nd Radio District, held at Hotel Pennsylvania, New York City, March 1-3, 1923. Radio broadcasting sprang up spontaneously in the US in 1920, igniting a "radio craze" among a Roaring 20s public fascinated by this new high-tech entertainment. The first commercial vacuum tube receivers like this one came out in 1920, made possible by a market-sharing and patent cross-licensing agreement brokered in 1919 by the US government between corporate giants Westinghouse, General Electric, AT&T, United Fruit, and RCA. Tuned radio frequency (TRF) receivers like this had multiple tuned circuits (two big knobs, center) which had to be tuned in tandem to bring in a station. Caption:"Rosalie Deneve, of New York, listening in on the huge Paragon set at the Second Annual Convention. |
| Date | |
| Source | Retrieved January 28, 2014 from Radio World, Hennessey Radio Publications Corp., New York, Vol. 2, No. 25, March 17, 1923, p. 16 on Google Books |
| Author | Picture credit to Underwood and Underwood |
| Permission (Reusing this file) |
This 1923 issue of Radio World magazine would have the copyright renewed in 1951. Online page scans of the Catalog of Copyright Entries, published by the US Copyright Office can be found here. [1] Search of the Renewals for Periodicals for 1950, 1951 and 1952 show no renewal entries for Radio World. Therefore the magazine's copyright was not renewed and it is in the public domain. |
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This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 15:39, 1 March 2014 | | 1,213 × 937 (214 KB) | Chetvorno (talk | contribs) | User created page with UploadWizard |
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