Датотека:Science and Invention Nov 1928 Cover 2.jpg

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Varadhan

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Opis

The television image would be viewed through the cone. The image was 1.5 inches square (4 by 4 cm) and had 48 scan lines at 7.5 frames per second. (This was a low definition "48p" display.) The man is using a 125 hertz tuning fork to adjust the scanning wheel to 450 RPM. By looking through the tuning fork at the line pattern on the hub, he could see when the wheel was at the correct speed.

"How to build the S&I Television Receiver" starts on page 618.

Science and Invention, November 1928. Volume 16 Number 7.
Published by Experimenter Publishing. New York, NY.
Editor-in-Chief and Publisher: Hugo Gernsback
Cover Art by R. E. Pattiani.
The page numbers were on an annual basis, not per issue. This issue had pages 577 to 672. The magazine is 8.5 by 11.5 inches.
Datum Magazine published November 1928, this page scanned July 2008.
Izvor This page was scanned by User:Swtpc6800 on an Epson Perfection 1240U at 300 dpi with half-tone de-screening enabled and stored as TIFF. The image was cropped and touched up in Adobe Photo Elements 5.0. This copy saved as a 100 dpi JPG.
Autor Experimenter Publishing
Dozvola
(Ponovno korišćenje ove datoteke)

This 1928 issue of Science and Invention would have the copyright renewed in 1955. Online page scans of the Catalog of Copyright Entries, published by the US Copyright Office can be found here. http://onlinebooks.library.upenn.edu/cce/ The search of the Renewals for Periodicals for 1954, 1955 and 1956 show no renewal entries for Science and Invention.

The copyright on the magazine was not renewed and it is in the public domain.

Science and Invention ceased publication with the August 1931 issue. A search of the copyright renewal records from 1951 to 1959 shows no entries for Science and Invention. All issues are in the public domain.
Ostale verzije Image:Science And Invention Nov 1928 Cover.png

Licenciranje

Public domain
Овај рад је у јавном власништву у Сједињеним Државама зато што је објављен или регистрован у канцеларији за ауторска права САД-а пре 1. јануара 1929.
Овај рад мора бити у јавном власништву у Сједињеним Државама и држави порекла да би се хостовао на Остави. Ако рад није дело америчког аутора, датотека обавезно мора имати и ознаку ауторских права за државу порекла да би се знало зашто је овај рад у јавном власништву у држави порекла.

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trenutna07:42, 6. avgust 2008.Minijatura za verziju na dan 07:42, 6. avgust 2008.850 × 1.163 (362 kB)Swtpc6800== Summary == {{Information | Description= ''Science & Invention'', November 1928. Volume 16 Number 7. Hugo Gernsback Editor-in-Chief. Cover Art by R. E. Pattiani. Published by Experimenter Publishing Company. New York, NY. The page numbers were on an

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