Hey! So I am a BIG fan of Rollerskating, I do it quite a lot. I can do a few tricks too! My dad teaches me :D. So heres just some basic info on Rollerskating:
Roller skating is the traveling on smooth surfaces with roller skates. It is a form of recreation as well as a sport, and can also be a form of transportation. Skates generally come in three basic varieties: quad rollerskates, Inline skates or blades and tri-skates, though some have experimented with a single-wheeled "quintessence skate" or other variations on the basic skate design. In America, this hobby was most popular in the 1970s and the 1990s.
1743: First recorded use of roller skates, in a London stage performance. The inventor of this skate is lost to history.
1760: First recorded skate invention, by John Joseph Merlin, who demonstrated a primitive inline skate with metal wheels.
1819: First patented roller skate design, in France by M. Petitbled. These early skates were similar to today's inline skates, but they were not very maneuverable; it was very difficult with these skates to do anything but move in a straight line and perhaps make wide sweeping turns.
Rest of the 19th century: inventors continued to work on improving skate design.
1863: The four-wheeled turning roller skate, or quad skate, with four wheels set in two side-by-side pairs, was first designed, in New York City by James Leonard Plimpton in an attempt to improve upon previous designs, The skate contained a pivoting action using a rubber cushion that allowed the skater to skate a curve just by leaning to one side. It was a huge success, so much that the first public skating rink was opened in 1866 in Newport, Rhode Island with the support of Plimpton. The design of the quad skate allowed easier turns and maneuverability, and the quad skate came to dominate the industry for more than a century.
1876: William Brown in Birmingham England patented a design for the wheels of roller skates. Brown's design embodied his effort to keep the two bearing surfaces of an axle, fixed and moving, apart. Brown worked closely with Joseph Henry Hughes, who drew up the patent for a ball for roller bearing race for bicycle and carriage wheels in 1877. Hughes' patent included all the elements of an adjustable system. These two men are thus responsible for modern day roller skate and skateboard wheels, as well as the ball bearing race inclusion in velocipede -- later to become motorbikes and automobiles. This was arguably, the most important advance in the realistic use of roller skates as a pleasurable pastime.

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