Underfriction
id:
underfriction-302-6446211
title:
Underfriction
text:
On a roller coaster train, 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 A. Miller.
brand slug:
wiki
category slug:
encyclopedia
description:
Roller coaster up-stop wheels that hold cars to the track
original url:
https://en.wikipedia.org/wiki/Underfriction
date created:
date modified:
2023-01-23T16:08:24Z
main entity:
{"identifier":"Q340922","url":"https://www.wikidata.org/entity/Q340922"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/2/25/Roller_coaster_wheels.jpg","width":1600,"height":1200}
fields total:
13
integrity:
15