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Water-powered automatic castle clock of Al-Jazari, 12th century. The most sophisticated water-powered astronomical clock was Al-Jazari's castle clock, considered by some to be an early example of a programmable analog computer, in 1206. [41] It was a complex device that was about 11 feet (3.4 m) high, and had multiple functions alongside ...
It may be the first known literary description of a mechanical clock. [93] There are references to house clocks from 1314 onwards; by 1325 the development of the mechanical clock can be assumed to have occurred. [94] Large mechanical clocks were built that were mounted in towers so as to ring the bell directly.
The verge escapement mechanism appeared during the surge of true mechanical clock development, which did not need any kind of fluid power, like water or mercury, to work. These mechanical clocks were intended for two main purposes: for signalling and notification (e.g., the timing of services and public events) and for modeling the solar system.
Al-Jazari constructed a variety of water clocks and candle clocks. These included a portable water-powered scribe clock, which was a meter high and half a meter wide, reconstructed successfully at the Science Museum in 1976 [34] [59] Al-Jazari also invented monumental water-powered astronomical clocks which displayed moving models of the Sun ...
The elephant clock in a manuscript by Al-Jazari (1206 AD) from The Book of Knowledge of Ingenious Mechanical Devices. [1] The elephant clock was a model of water clock invented by the medieval Islamic engineer Ismail al-Jazari (1136–1206). Its design was detailed in his book, The Book of Knowledge of Ingenious Mechanical Devices.
This is an accepted version of this page This is the latest accepted revision, reviewed on 25 February 2025. 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 ...
c. 3500 BC - Egyptian obelisks are among the earliest shadow clocks. [1] c. 1500 BC - The oldest of all known sundials, dating back to the 19th Dynasty. [2] c. 500 BC - A shadow clock is developed similar in shape to a bent T-square. [3] 3rd century BC - Berossos invents the hemispherical sundial. [4] 270 BCE - Ctesibius builds a water clock.
The hour indicator ascends as water flows in. Also, a series of gears rotate a cylinder to correspond to the temporal hours. An automaton clock or automata clock is a type of striking clock featuring automatons. [2] Clocks like these were built from the 1st century BC through to Victorian times in Europe.