A rocking chair (or rocker) is a type of chair with two curved bands of wood (also known as rockers) attached to the bottom of the legs (one on the left two legs and one on the right two legs). The chair contacts with the floor at only two points, giving the occupant the ability to rock back and forth by shifting his/her weight or pushing lightly with his/her feet. Many find rocking chairs soothing because of the gentle motion. Rocking chairs are also comfortable because, when a user sits in one without rocking, the chair automatically rocks backwards until the sitter's center of gravity is met, thus granting an ergonomic benefit with the occupant kept at a very unstressed position and angle. Varieties of rockers include those mounted on a spring base (or platform) called "platform rockers" and those with swinging braces commonly known as gliders.
According to an american legend, the rocking chair was purportedly invented by Ben Franklin by simply taking a standard chair and adding rockers to it. Cabinetmakers began producing rocking chairs in the early nineteenth century, and many examples from that era still survive today. Their popularity has only increased, and antique rockers of many varieties are highly collectable today.
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