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This is because it has proven difficult to distinguish from the meager written documentation which of these early tower clocks were mechanical, and which were water clocks; the same Latin word, horologe, was used for both. [23] [11] None of the original mechanisms have survived unaltered. Sources differ on which was the first clock 'known' to ...
A water clock or clepsydra (from Ancient Greek κλεψύδρα (klepsúdra) 'pipette, water clock'; from κλέπτω (kléptō) 'to steal' and ὕδωρ (hydor) 'water'; lit. ' water thief ' ) is a timepiece by which time is measured by the regulated flow of liquid into (inflow type) or out from (outflow type) a vessel, and where the amount ...
Records in financial transactions for the construction of clocks point to the late 13th century as the most likely date for when tower clock mechanisms transitioned from water clocks to mechanical escapements. [23]: 103-104 [24] Most sources agree that mechanical escapement clocks existed by 1300. [25] [26]
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Islamic water clocks, which used complex gear trains and included arrays of automata, were unrivalled in their sophistication until the mid-14th century. [40] [41] Liquid-driven mechanisms (using heavy floats and a constant-head system) were developed that enabled water clocks to work at a slower rate. [41]
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Water from a pump in the basement, just below the clock, is pumped through a pipe running up the middle of the clock into a reservoir at the top. The water then drips down onto a scoop at the top which is connected to the green, swinging pendulum. The pendulum causes the scoop to dump the water into a series of siphons.
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