Second, the transition from small clock to pocket watch.
Third, the development from pocket watch to wrist watch.
The development of each stage is inseparable from the technological invention at that time.
/kloc-in the 0/4th century, clocks appeared in the tall buildings of European countries such as Britain and France. The power of the clock comes from hanging a heavy hammer with a rope and using gravity to generate gravity.
At the end of 15 and the beginning of 16, iron clockwork appeared, which gave clocks a new power source and created conditions for their miniaturization.
1583, Italian Galileo established the famous isochronism theory, which is the theoretical basis of pendulum.
1656, Dutch scientist huygens applied Galileo's theory to design the pendulum. The next year, under his guidance, the young watchmaker S.Coster successfully made the first pendulum.
1675, he replaced the original pendulum with a hairspring, thus forming a small clock with clockwork as the power and hairspring as the speed regulating mechanism, which also provided conditions for manufacturing portable pocket watches.
/kloc-during the 0/8th century, various escapement mechanisms were invented, which laid the foundation for the further emergence and development of pocket watches.
Gee Graham, an Englishman, perfected the I-wheel escapement in 1726, which is different from the vertical axis escapement invented before, so the pocket watch movement is relatively thin.
In addition, around 1757, Thomas Mudge, an Englishman, invented the fork escapement mechanism, which further improved the timing accuracy of pocket watches.
During this period, until the19th century, a large number of watch manufacturers were produced, which promoted the development of pocket watches.
/kloc-In the second half of the 20th century, some women's bracelets were decorated with small watches.
At that time, people just regarded it as a piece of jewelry and did not fully realize its practical value.
It was not until human history entered the 20th century that it was possible to establish the status of watches with the improvement of watchmaking technology and the great changes of scientific and technological civilization.
At the beginning of the 20th century, nurses hung small bags of watches on their chests to keep track of time. People attach great importance to its practicality and demand convenience, accuracy and durability.
Especially with the outbreak of World War I, pocket watches can no longer meet the needs of combat soldiers, and the production of watches has become the general trend.
1926, Rolex Watch Factory made a completely waterproof watch case and applied for a patent, named oyster. The following year, a brave British woman, Mercedes Gl, wore this watch to complete the feat of crossing the English Channel.
This incident has also become an important turning point in the history of watches.
Since then, many new designs and technologies have also been applied to the wrist watch, becoming a real timing tool worn on the wrist.
Immediately after World War II, the output of watches was greatly increased and the price was also reduced, so that ordinary people could have it.
The era of watches has arrived!