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Deskripsi

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.
Tanggal Magazine published November 1928, this page scanned July 2008.
Sumber 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.
Pembuat Experimenter Publishing
Izin
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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.
Versi lainnya Image:Science And Invention Nov 1928 Cover.png

Lisensi

Public domain
Karya ini berada dalam domain publik di Amerika Serikat karena karya ini dipublikasikan (atau didaftarkan di U.S. Copyright Office) sebelum 1 Januari 1929.
Karya dalam domain publik harus tidak memiliki hak cipta di Amerika Serikat dan di negara sumber dari karya tersebut agar dapat disimpan di Commons. Jika karya tersebut bukan karya A.S., berkas tersebut harus memiliki tag hak cipta tambahan yang menunjukkan status hak cipta di negara sumber.

PD-US-expired Public domain in the United States //commons.wikimedia.org/wiki/File:Science_and_Invention_Nov_1928_Cover_2.jpg

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terkini6 Agustus 2008 05.42Miniatur versi sejak 6 Agustus 2008 05.42850 × 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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