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The trundle wheel is composed of a wheel, a handle which is attached to the axle allowing the trundle wheel to be held easily, and a clicking device which is triggered once per revolution of the wheel. Trundle wheels are not as accurate as other methods of measuring distance but are a good way to get a rough estimation of a fairly long distance ...
The wheel is placed in contact with the curved line to be measured and run along its length. By counting the number of teeth passing a mark on the handle while this is done, the length of the line can be ascertained: line length = wheel circumference × teeth counted/teeth on wheel.
Trundle bed, a bed that is stored under another bed Trundle wheel , a measuring device based on the circumference of a wheel Trundle, the Troll King, a playable champion character in the multiplayer online battle arena video game League of Legends
Jones Counter on the front wheel of a bicycle. To measure road-race courses, the counter is fitted to a bicycle between the left fork leg and the front wheel. [5] The tab or tabs on the large ring gear engage with the spokes, thus providing drive to a Veeder-Root counter.
Gunter's chain (also known as Gunter's measurement) is a distance-measuring device used for surveying. It was designed and introduced in 1620 by English clergyman and mathematician Edmund Gunter (1581–1626). It enabled plots of land to be accurately surveyed and plotted, for legal and commercial purposes.
A trundle wheel in use (detail from the frontispiece of Ogilby's Britannia (1675)).. In 1675, John Ogilby (1600–1676) issued his Britannia (also Itinerarium Angliæ), a road atlas depicting in strip form of most of the major routes in England and Wales. [5]