On a
roller coasterThe roller coaster is a popular amusement ride developed for amusement parks and modern theme parks. LaMarcus Adna Thompson patented the first coasters on January 20, 1885...
trainA roller coaster train describes the vehicle which transports passengers around a roller coaster's circuit. More specifically, a roller coaster train is made up of two or more "cars" which are connected by some sort of specialized joint. It is called a "train" because the cars follow one another...
, the
underfriction,
up-lift, or
up-stop wheels are a device to keep the train from jumping off the track under intense movement. The design was patented in 1919 by
John MillerJohn A. Miller was a roller coaster designer and builder. He held over 100 patents, many of which were for roller coaster safety devices , that remain key components of present-day roller coasters...
.
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On a
roller coasterThe roller coaster is a popular amusement ride developed for amusement parks and modern theme parks. LaMarcus Adna Thompson patented the first coasters on January 20, 1885...
trainA roller coaster train describes the vehicle which transports passengers around a roller coaster's circuit. More specifically, a roller coaster train is made up of two or more "cars" which are connected by some sort of specialized joint. It is called a "train" because the cars follow one another...
, the
underfriction,
up-lift, or
up-stop wheels are a device to keep the train from jumping off the track under intense movement. The design was patented in 1919 by
John MillerJohn A. Miller was a roller coaster designer and builder. He held over 100 patents, many of which were for roller coaster safety devices , that remain key components of present-day roller coasters...
.