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Yi Xing also owed much to the scholarly followers of Ma Jun, who had employed horizontal jack-wheels and other mechanical toys worked by waterwheels. [4] The Daoist Li Lan was an expert at working with water clocks, creating steelyard balances for weighing water that was used in the tank of the clepsydra, [4] providing more inspiration for Yi Xing.
He invented a mechanized water clock with the Tantric monk and mathematician Yi Xing (Chinese: 一行; pinyin: Yī Xíng; Wade–Giles: I-Hsing). [1] [2] [3] It was actually an astronomical instrument that served as a clock, made of bronze in the capital of Chang'an in the 720s. It was described by a contemporary text this way:
This is an accepted version of this page This is the latest accepted revision, reviewed on 27 December 2024. Type of clock A traditional wind-up (key-wound), mechanical spring-powered alarm clock An alarm clock or alarm is a clock that is designed to alert an individual or group of people at a specified time. The primary function of these clocks is to awaken people from their night's sleep or ...
The liquid in water clocks was liable to freezing, and had to be kept warm with torches, a problem that was solved in 976 by the Chinese astronomer and engineer Zhang Sixun. His invention—a considerable improvement on Yi Xing's clock—used mercury instead of water. Mercury is a liquid at room temperature, and freezes at −38.83 °C (−37.9 ...
Yi Xing's device also had a mechanically timed bell that was struck automatically every year, and a drum that was struck automatically every quarter-hour; essentially, a striking clock. [24] Yi Xing's astronomical clock and water-powered armillary sphere became well known throughout the country, since students attempting to pass the imperial ...
Amazon CEO Jeff Bezos spends his fortune on a lot of interesting projects, such as The Washington Post, Blue Origin, and giant historical mansions.
Yi Xing (683–727), Chinese Buddhist and engineer, astronomical clock. Zhang Sixun (10th century AD), Chinese engineer, clepsydra with water wheel. Su Song (11th century AD), Chinese engineer, clepsydra with water wheel and ratchet. Al-Dschazarī, Arabic engineer and author of the 12th century, elephant clock.
The tower clock of Norwich Cathedral constructed c. 1273 (reference to a payment for a mechanical clock dated to this year) is the earliest such large clock known. The clock has not survived. [ 95 ] The first clock known to strike regularly on the hour, a clock with a verge and foliot mechanism, is recorded in Milan in 1336. [ 96 ]
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