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File:Beijing Ancient Observatory 91106.jpg

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English: Steel Yard Clepsydra. Li Lan, Northern Wei dynasty, ca. 450 AD (replica). Ancient Observatory Museum, Beijing

This is a closeup of the powering mechanism of a lever-arm water clock (clepsydra). Its operation depends on maintaining a drip siphon from the reservoir into the working bucket, whose descent raises a lever arm to tell the time. A float inside the reservoir allows the water to be taken from a constant level as it drains; this evens out the rate of the clock.
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current00:47, 8 December 2015Thumbnail for version as of 00:47, 8 December 20152,592 × 1,944 (2.18 MB)G41rn8 (talk | contribs)User created page with UploadWizard

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