Pocket watch, China Pocket watch, Pocket watch Manufacturers, China Pocket watch Suppliers--yiwugift.com

The first pocket watch was created in Germany by Peter Henlein in 1524. Others appears in 1548 and more were produced in Switzerland and England after 1575. At this time the main problem was the driving mechanism. Typically, weights were used, which made portable watches impractical, but it was a period of great advancement and innovation. The first movements were made of steel, then later brass. They had no balance springs and were notoriously inaccurate. The watches had only an hour hand and had to be wound twice daily. Soon the spiral leaf mainspring appeared, the greatest innovation at the time as it allowed long-term power without weights. Because of a difference in timing between the long arcs and the short arcs, accuracy could only be improved by using a limited portion of the mainspring. Germany produced a watch with a cam at the end of a barrel arbor to compensate for variations in spring tension, but it was the English and French solution to use the fusee. This stopped the watch during winding to prevent over oscillation of the balance wheel. Additional stops were included as regulators.
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