Coil spring
Mechanical device which stores energy / From Wikipedia, the free encyclopedia
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A coil spring is a type of spring made out of a long piece of metal that is wound around itself. Coil springs were in use in Roman times, evidence of this can be found in bronze Fibulae — the clasps worn by Roman soldiers among others. These are quite commonly found in Roman archeological digs.
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Coil springs can be either compression springs,[1] tension springs[2] or torsion springs,[3] depending on how they are wound.
A coil spring is a mechanical device which is typically used to store energy and subsequently release it, to absorb shock, or to maintain a force between contacting surfaces. They are made of an elastic material formed into the shape of a helix which returns to its natural length when unloaded.
They are commonly used in mattresses, automotive suspensions,[4] and residential plumbing. Coil springs come in a variety of sizes and shapes and can be used for a variety of applications. Small coil springs are often used in electronic devices, while larger ones are used in automobile suspensions. Coil springs can be made from various materials, including steel, brass, and bronze.[5]