Dosya:Giovanni Di Dondi clock.png

Bu önizlemenin boyutu: 497 × 599 piksel. Diğer çözünürlükler: 199 × 240 piksel | 398 × 480 piksel | 964 × 1.162 piksel.

Tam çözünürlük ‎((964 × 1.162 piksel, dosya boyutu: 72 KB, MIME tipi: image/png))

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Özet

AçıklamaGiovanni Di Dondi clock.png	English: Drawing of the bottom section of Giovanni de Dondi's astronomical clock, the Astrarium, finished 1364, Padua, Italy. This early weight-driven clock kept time with a balance wheel (crown shape, at top) driven by a verge escapement (wheel under it). This is one of the earliest existing drawings of those mechanisms. The balance wheel had a beat of 2 seconds. The actual clock was a lot more complicated than this drawing, which only shows the lower section containing the weights, escapement and main gear train. The upper section, mounted on top of this, had 7 dials, displaying the astrological motions of the Sun, Moon, Mercury, Venus, Mars, Jupiter, and Saturn. See Giovanni De Dondi's Astrarium. Alterations to image: converted to 8 color PNG.
Tarih	Original illustration: 1461.
Kaynak	This is a modern tracing of an illustration in a 1461 manuscript at Oxford University (MS Laud. Misc. 620 Folio 10). A photo of the illustration can be seen here. It is almost certainly originally from Giovanni de Dondi's 1364 treatise on his clock, Tractatus Astrarii. Downloaded from Dohrn-van Rossum, Gerhard (1996) History of the Hour: Clocks and Modern Temporal Orders, Univ. of Chicago Press, Chicago, USA, p.50, fig.8 caption credits it to Manuscript 172, Eton College, UK.
Yazar	Giovanni de Dondi
İzin (Bu dosyanın tekrar kullanımı)	Public domain - author died in 1389.

Lisanslama

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Ayrıca bu çalışma ABD'de neden kamu malı olduğuna dair ABD için kamu malı etiketlerini bulundurmalıdır. Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).

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Dosya geçmişi

Dosyanın herhangi bir zamandaki hâli için ilgili tarih/saat kısmına tıklayın.

	Tarih/Saat	Küçük resim	Boyutlar	Kullanıcı	Yorum
güncel	17.03, 21 Haziran 2008		964 × 1.162 (72 KB)	Chetvorno	== Summary == {{Information \|Description={{en\|Drawing of the bottom section of Giovanni de Dondi's astronomical clock, the Astrarium, finished 1364, Padua, Italy. This early weight-driven clock kept time with a balance whe
	16.57, 1 Temmuz 2007		400 × 507 (23 KB)	Chetvorno	== Summary == {{Information \|Description=Drawing of Giovanni De Dondi's astronomical clock, built 1379, Padua, Italy. This may be the earliest known drawing of a balance wheel (crown shaped, at top) and a verge escapement (wheel under it). The balance w