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Grandfather clock. 8-day longcase clock. This example dates back to 1700 and the case to late 19th – early 20th century. The original dial of this clock was replaced by a brass dial with Tamil numerals, perhaps around the same time as the case. The original long-case was also replaced by a mandapa -shaped wooden carved case done in South ...
The Ottoman engineer Taqi ad-Din described a weight-driven clock with a verge-and-foliot escapement, a striking train of gears, an alarm, and a representation of the Moon's phases in his book The Brightest Stars for the Construction of Mechanical Clocks (Al-Kawākib al-durriyya fī wadh' al-bankāmat al-dawriyya), written around 1565. [119]
Clockwork refers to the inner workings of either mechanical devices called clocks and watches (where it is also called the movement) or other mechanisms that work similarly, using a series of gears driven by a spring or weight. [1][2][3] A clockwork mechanism is often powered by a clockwork motor [4] consisting of a mainspring, a spiral torsion ...
Mechanical clocks must be wound periodically, usually by turning a knob or key or by pulling on the free end of the chain, to store energy in the weight or spring to keep the clock running. In electric clocks, the power source is either a battery or the AC power line. In clocks that use AC power, a small backup battery is often included to keep ...
The verge (or crown wheel) escapement is the earliest known type of mechanical escapement, the mechanism in a mechanical clock that controls its rate by allowing the gear train to advance at regular intervals or 'ticks'. Verge escapements were used from the late 13th century until the mid 19th century in clocks and pocketwatches.
The mechanism which runs a mechanical clock is called the movement. The movements of all mechanical pendulum clocks have these five parts: [27] A power source; either a weight on a cord or chain that turns a pulley or sprocket, or a mainspring. A gear train (wheel train) that steps up the speed of the power so that the pendulum can use it.
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