Mechanical Sciences
Mechanical Sciences
Mechanical Sciences
Articles | Volume 12, issue 2
Articles | Volume 12, issue 2
https://doi.org/10.5194/ms-12-891-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ms-12-891-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 12, issue 2
Research article
 | 
24 Sep 2021
Research article |  | 24 Sep 2021

Reconstruction designs of an early Chinese astronomical clock with a waterwheel steelyard clepsydra

Zeng-Hui Hwang, Tsung-Yi Lin, and Hong-Sen Yan

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Short summary
The monk I-Hsing (621–727) was an outstanding astronomer and mathematician during the Tang Dynasty. He was the first person to use scientific methods to measure the length of the meridian. History records that the waterwheel drove his hydromechanical clock, and the time-reporting device could accurately tell the time. Therefore, his hydromechanical clock had a timing function and an escapement regulation device.
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