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By Felix | Category encyclopedia
Portable clocks were built around proven already in 1500 by Peter Henlein, however, in the form of pocket watches. However, there were probably already portable clocks. They were made possible by the invention of the mainspring, which allowed the drive and the balance (torsion pendulum) as a replacement for the suspended pendulum clock as tie-breaker. Through the watches they could shrink to manageable size. However, there was a long time before the pocket.
Further miniaturization of the movement was the turn of the 20th Century Clock shrink to size bracelet. At this time it gradually became fashion to wear the great ladies wristwatch wrist watches. This fashion was initially applied to men as "effeminate" - men used to continue the pocket watch chain. This proved to be unwieldy for some uses, however, as, for example, for pilots who were instructed at that time in her sparsely furnished with instruments aboard aircraft in a fast and precise timing. The Brazilian aviation pioneer Alberto Santos-Dumont was inspired by his friend, the Parisian watchmaker Louis Cartier built a clock for pilots, which was worn on the wrist: The Cartier Santos is considered the first wristwatch for men.
After the officers found in the First World War, that their pocket watches in the winter and generally under combat conditions proved to be impractical, the watch is set in the military and quickly ultimately in civil society and was at the war's end the general standard has become.
The first automatic watch (wristwatch with a swing of the pendulum mass) was built in 1923 by John Harwood. Harwood had constructed did not seem that Abraham Louis Perrelet as early as 1770 a pocket watch with the rotor and the coupler (ie teasing on both sides). Later built a Rolex automatic watch with one-sided winding rotor and patented it. An Automatic draws the energy for stretching the spring from the arm movements of the wearer. (From Wikipedia)
Tags: automatic watch , cartier , rotating pendulum , history , heinlein , Louis Cartier , peter heinlein , pocket watch
