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Huygens' maintaining power in use. The weight drive used by Christiaan Huygens in his early clocks acts as a maintaining power. In this layout, the weight which drives the clock is carried on a pulley and the cord (or chain) supporting the weight is wrapped around the main driving wheel on one side and the rewinding wheel on the other.
The force of the mainspring then turns the clock's wheels as it unwinds, until the next winding is needed. The adjectives wind-up and spring-powered refer to mechanisms powered by mainsprings, which also include kitchen timers , metronomes , music boxes , wind-up toys and clockwork radios .
In striking clocks, the striking train is a gear train that moves a hammer to strike the hours on a gong. It is usually driven by a separate but identical power source to the going train. In antique clocks, to save costs, it was often identical to the going train, and mounted parallel to it on the left side when facing the front of the clock. [11]
The torsion pendulum clock was first invented and patented by American Aaron Crane in 1841. [4] He made clocks that would run up to one year on a winding. He also made precision astronomical regulator clocks based on the torsion pendulum, but only four were sold. The German Anton Harder apparently independently invented and patented the torsion ...
The Self Winding Clock Company (SWCC) was a major manufacturer of electromechanical clocks from 1886 until about 1970. [1] Based in New York City, the company was one of the first to power its clocks with an electric motor instead of winding by hand. A patented clock mechanism automatically rewinds the main spring each hour by the small ...
In this type the wearer must turn the crown periodically, often daily, in order to wind the mainspring, storing energy to run the watch until the next winding. Automatic or self-winding In an automatic watch , including in most mechanical watches sold today, the mainspring is automatically wound by the natural motions of the wearer's wrist ...
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It is usually a planetary gear mechanism (epicyclic gearing) in the base of the fusee "cone" which then provides turning power in the opposite direction to the 'winding up' direction therefore keeping the watch or clock running during winding. Most fusee clocks and watches include a 'winding stop' mechanism to prevent the mainspring and fusee ...
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