page_title: Pedrail wheel
section_title: Invention
hierarchical_section_title: Pedrail wheel / Invention
caption_attribution_description: English: Bramah Joseph Diplock pedrail locomotive
context_page_description: The pedrail wheel is a type of wheel developed in the early 20th century for all-terrain locomotion. They consist of a series of "feet" connected to pivots on a wheel. As the wheel turns, the feet come into contact with the ground, and rotate so they remain flat to the ground as the wheel moves over them. Pedrail wheels may be simple systems with the feet connected to a rigid wheel, but more complex systems including various built-in suspension systems were designed to improve performance on uneven ground. The system was used in agricultural machinery.
  Pedrail wheels should not be confused with dreadnaught wheels which have articulated rails attached at the rim for the wheel to roll over. Both designs were replaced by continuous track systems.
context_section_description: The pedrail wheel was invented in 1903 by the Londoner Bramah Joseph Diplock. It consists in the adjunction of feet (Latin radical "ped") to the rail of a wheel, in order to improve traction and facilitate movement in uneven or muddy terrain. Sophisticated pedrail wheels were designed, with individual suspension for each foot, which would facilitate the contact with uneven terrain.
  Bramah Joseph Diplock also invented the pedrail locomotive which was featured in the 7 February 1904 New York Times.
caption: The pedrail locomotive invented by Bramah Joseph Diplock of London.[1]
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