Mechanical watch | Wikipedia audio article
Channel: wikipedia tts
Date: 14/12/2018

This is an audio version of the Wikipedia Article:
Mechanical watch


00:01:08 1 Components
00:04:49 2 Mechanism
00:05:06 2.1 Mainspring and motion work
00:05:53 2.2 Wheel train
00:06:21 2.3 Escapement
00:07:07 2.4 Balance wheel
00:09:11 2.5 Keyless work
00:10:06 2.6 Center seconds
00:11:22 3 Watch jewels
00:12:39 3.1 Purposes
00:13:30 3.2 Types
00:14:40 3.3 Where they are used
00:16:11 3.4 'Jewel inflation'
00:18:39 4 World time
00:20:45 5 History
00:23:35 6 See also



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SUMMARY
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A mechanical watch is a watch that uses a clockwork mechanism to measure the passage of time, as opposed to  quartz watches which function electronically via a small battery. A mechanical watch  is driven by a  mainspring which must be hand-wound periodically.  Its force is transmitted through a series of gears to power the balance wheel, a weighted wheel which oscillates back and forth at a constant rate.   A device called an escapement releases the watch's wheels to move forward a small amount with each swing of the balance wheel, moving the watch's hands forward at a constant rate.  This makes the 'ticking' sound characteristic of all mechanical watches. Mechanical watches evolved in Europe in the 17th century from spring powered clocks, which appeared in the 15th century.
Mechanical watches are typically not as accurate as modern electronic quartz watches, and they require periodic cleaning by a skilled watchmaker.  Since the 1970s, quartz watches have taken over most of the watch market, and mechanical watches are now mostly a high-end product, purchased for aesthetic reasons, for appreciation of their fine craftsmanship, or as a status symbol.