Wind-up toy

A wind-up toy is a toy powered by a clockwork motor.

History

In the late 15th century, Karel Grod , a German inventor, created some of the first wind-up toys, including a metal fly and a mechanical eagle. In 1509, Leonardo da Vinci created a wind-up lion as a greeting for Louis XII in Italy. Wind-up toys were at first for only royalty, and were more elaborate, with complex systems of gears and springs. In support of his theory that all animals are complex machines, René Descartes may have attempted to build some automata. According to legend, a life-sized wind-up human girl was discovered in his luggage aboard a ship in which he was traveling to Sweden, and was thrown overboard by order of the ship's Captain.

After the larger, elaborate wind-up machine art declined in interest, wind-up toys were created cheaply in large numbers by the 1800s. Wind-up machines became known as wind-up toys, and were designed in different forms to move around.

European toy makers created and mass-produced the first windup tin toys during the late 1880s. Over the next 60 to 70 years, more manufacturers created more intricate designs. The trend stopped with the introduction of the small and inexpensive Alkaline battery in the 1960s, which allowed motors to run without a wind up mechanism. Over the next 20 years, wind up toys lost popularity.

Wind

Wind is the flow of gases on a large scale. On the surface of the Earth, wind consists of the bulk movement of air. In outer space, solar wind is the movement of gases or charged particles from the Sun through space, while planetary wind is the outgassing of light chemical elements from a planet's atmosphere into space. Winds are commonly classified by their spatial scale, their speed, the types of forces that cause them, the regions in which they occur, and their effect. The strongest observed winds on a planet in the Solar System occur on Neptune and Saturn. Winds have various aspects, an important one being its velocity; another the density of the gas involved; another is the energy content or wind energy of a wind.

In meteorology, winds are often referred to according to their strength, and the direction from which the wind is blowing. Short bursts of high speed wind are termed gusts. Strong winds of intermediate duration (around one minute) are termed squalls. Long-duration winds have various names associated with their average strength, such as breeze, gale, storm, and hurricane. Wind occurs on a range of scales, from thunderstorm flows lasting tens of minutes, to local breezes generated by heating of land surfaces and lasting a few hours, to global winds resulting from the difference in absorption of solar energy between the climate zones on Earth. The two main causes of large-scale atmospheric circulation are the differential heating between the equator and the poles, and the rotation of the planet (Coriolis effect). Within the tropics, thermal low circulations over terrain and high plateaus can drive monsoon circulations. In coastal areas the sea breeze/land breeze cycle can define local winds; in areas that have variable terrain, mountain and valley breezes can dominate local winds.