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  2. Su Song - Wikipedia

    en.wikipedia.org/wiki/Su_Song

    Su Song's greatest project was the 40-foot-tall water-powered astronomical clock tower constructed in Kaifeng, the wooden pilot model completed in 1088, the bronze components cast by 1090, while the wholly finished work was completed by 1094 during the reign of Emperor Zhezong of Song.

  3. Zhang Sixun - Wikipedia

    en.wikipedia.org/wiki/Zhang_Sixun

    The later Song dynasty historical text of the Song Shi (compiled in 1345 AD) records Zhang's work (Wade-Giles spelling): . At the beginning of the Thai-Phing Hsing-Kuo reign-period (+976) the Szechuanese Chang Ssu-Hsun [Zhang Sixun], a student in the Bureau of Astronomy, invented an astronomical clock (lit. armillary sphere, hun i) and presented the designs to the emperor Thai Tsung, who ...

  4. Portal:Society/Featured biography/36 - Wikipedia

    en.wikipedia.org/wiki/Portal:Society/Featured...

    Su's clock tower also featured the oldest known endless power-transmitting chain drive, called the tian ti (天梯), or "celestial ladder", as depicted in his horological treatise.The clock tower had 133 different clock jacks to indicate and sound the hours. Su Song's treatise about the clock tower, Xinyi Xiangfayao (新 儀 . 象 法 要), has ...

  5. Astronomical clock - Wikipedia

    en.wikipedia.org/wiki/Astronomical_clock

    In the 11th century, the Song dynasty Chinese horologist, mechanical engineer, and astronomer Su Song created a water-driven astronomical clock for his clock-tower of Kaifeng City. Su Song is noted for having incorporated an escapement mechanism and the earliest known endless power-transmitting chain drive for his clock-tower and armillary ...

  6. Science and technology of the Song dynasty - Wikipedia

    en.wikipedia.org/wiki/Science_and_technology_of...

    The original diagram of the book by Su Song in 1092, showing the inner workings of his clock tower, with the clepsydra tank, a waterwheel with scoops and the escapement, a chain drive, the armillary sphere crowning the top, and the rotating wheel with clock jacks that sounded the hours with bells, gongs, and drums.

  7. Dover City Hall clock tower motor freezes. Repairs are ... - AOL

    www.aol.com/dover-city-hall-clock-tower...

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  8. Clock tower - Wikipedia

    en.wikipedia.org/wiki/Clock_tower

    In Song dynasty China, an astronomical clock tower was designed by Su Song and erected at Kaifeng in 1088, featuring a liquid escapement mechanism. [2] In England, a clock was put up in a clock tower, the medieval precursor to Big Ben, at Westminster, in 1288; [3] [4] and in 1292 a clock was put up in Canterbury Cathedral. [3]

  9. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    In 976, the Song dynasty astronomer Zhang Sixun addressed the problem of the water in clepsydrae freezing in cold weather when he replaced the water with liquid mercury. [32] A water-powered astronomical clock tower was built by the polymath Su Song in 1088, [33] which featured the first known endless power-transmitting chain drive. [34]