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File:Clock Tower from Su Song's Book.JPG

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Description Chinese mechanical and horological engineering from the Song Dynasty; this diagram provides an overall general view of the inner workings and armillary sphere of Su Song's clocktower built in Kaifeng. The drawn illustration comes from Su Song's book Xin Yi Xiang Fa Yao published in the year 1092. On the right is the upper reservoir tank with the 'constant-level tank' beneath it. In the center foreground is the 'earth horizon' box in which the celestial globe was mounted. Below that are the time keeping shaft and wheels supported by a mortar-shaped end-bearing. Behind this is the main driving wheel with its spokes and scoops. Above that are the left and right upper locks with an upper balancing lever and upper link.
Date
Source Page 451 of Joseph Needham's book Science and Civilization in China: Volume 4, Part 2, Mechanical Engineering.
Author PericlesofAthens
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Date/TimeThumbnailDimensionsUserComment
current14:21, 15 October 2017Thumbnail for version as of 14:21, 15 October 20171,051 × 1,392 (499 KB)Aubry GérardNetteté, nettoyage
08:21, 17 March 2016Thumbnail for version as of 08:21, 17 March 2016908 × 1,366 (776 KB)PawełMMcleaned, contrast enhanced, desaturated
16:56, 14 August 2007Thumbnail for version as of 16:56, 14 August 2007908 × 1,366 (722 KB)PericlesofAthens{{Information |Description=Chinese mechanical and horological engineering from the Song Dynasty; this diagram provides an overall general view of the inner workings and armillary sphere of Su Song's clocktower built in Kaifeng. The drawn illustration come

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