Ma Jun

Ma Jun (fl. 220–265), style name Deheng (徳衡), was a Chinese mechanical engineer and government official during the Three Kingdoms era of China. His most notable invention was that of the South Pointing Chariot, a directional compass vehicle which actually had no magnetic function, but was operated by use of differential gears (which applies equal amount of torque to driving wheels rotating at different speeds). It is because of this revolutionary device (and other achievements) that Ma Jun is known as one of the most brilliant mechanical engineers and inventors of his day (alongside Zhang Heng of the earlier Eastern Han Dynasty). The device was re-invented by many after Ma Jun, including the astronomer and mathematician Zu Chongzhi (429-500 AD). In the later medieval dynastic periods, Ma Jun's South Pointing Chariot was combined in a single device with the distance-measuring odometer.

Read more about Ma JunBiography, Engineering and Technological Achievements

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Ma Jun - Engineering and Technological Achievements
... One of Ma Jun's early inventions was an improved silk loom, which, according to Fu Xuan, earned Ma Jun considerable recognition for his innovative skill ... Ma Jun crafted a loom that had only twelve treadles, which not only made the process faster and more efficient, but also allowed the weaving of new intricate patterns ... While serving the Wei court, Ma Jun got into a dispute with the Permanent Counsellor Gaotang Long and the Cavalry General Qin Lang at court over the concept of the south-pointing carriage ...
Declared Monuments Of Hong Kong - List of Monuments
24 Hong Kong Observatory Tsim Sha Tsui Yau Tsim Mong Declared on 15 Jun 1984 ... Stanley Police Station Stanley Southern Declared on 15 Jun 1984 ... Old Supreme Court Central Central and Western Declared on 15 Jun 1984 ...
Historical Texts For South-pointing Chariot - Earliest Sources
... discern the southern cardinal direction (without magnetics), was given a brief description by Ma's contemporary Fu Xuan ... written by Yuan Huan also described the south-pointing chariot of Ma Jun ... background legend of the device's (supposed) use long before Ma's time, in the Western Zhou Dynasty (1050–771 BCE) ...
Science And Technology In China - Han Dynasty
... The mechanical engineer Ma Jun (c.200-265 AD) was another impressive figure from ancient China ... Ma Jun improved the design of the silk loom, designed mechanical chain pumps to irrigate palatial gardens, and created a large and intricate mechanical puppet theatre for Emperor Ming of Wei ... However, Ma Jun's most impressive invention was the South Pointing Chariot, a complex mechanical device that acted as a mechanical compass vehicle ...