How watch is made - material, manufacture, making, used, parts, components,

structure, product
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[INPUT] How Products Are MadeHow Products Are Made

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1. Made How
2. Volume 1
3. Watch

** Watch **

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* Background *

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The oldest means of determining time is by observing the location of the
sun in the sky. When the sun is directly overhead, the time is roughly
12:00 noon. A slightly later development, and one less subject to an
individual's judgment, is the use of a sundial. During the daylight hours,
sunlight falls on a vertical pole placed at the center of a calibrated
dial, thus casting a shadow on the dial and providing the reader with a
relatively accurate time reading.

The invention of the mechanical clock in the fourteenth century was a major
advancement—it provided a more concise and consistent method of measuring
time. The mechanical clock includes a complicated series of wheels, gears,
and levers powered by a falling weights and with a pendulum (or later a
wound-up spring). These pieces together moved the hand or hands on a dial
to show the time. The addition of chimes or gongs on the hour, half hour,
and quarter hour followed soon afterward. By the eighteenth century,
smaller clocks for the home were available, and, unlike their predecessors,
were closed and sealed in a case.

The more exacting the workmanship of the moving parts, the more accurate
the clock was. From invention through to the middle of the twentieth
century, developments in clock-making focused on making the moving parts
work as accurately as possible. Developments in metal technology and in
miniaturization, the lubrication of small parts, and the use of first,
natural sapphires (and then artificial sapphires) at the spots that
received the most


Source: www.madehow.com/Volume-1/Watch.html


how is a watch made

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