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  2. Traffic cone - Wikipedia

    en.wikipedia.org/wiki/Traffic_cone

    Traffic cones, also called pylons, witches' hats, [1] [2] road cones, highway cones, safety cones, caution cones, channelizing devices, [3] construction cones, roadworks cones, or just cones, are usually cone-shaped markers that are placed on roads or footpaths to temporarily redirect traffic in a safe manner.

  3. Rogallo wing - Wikipedia

    en.wikipedia.org/wiki/Rogallo_wing

    A renaissance in hang gliding occurred in the 1960s, and John Worth was the early leader in the pack of four-boom hang glider builders and designers using public domain designs. Single-point hang was fully demonstrated in Breslau in 1908, as well as the triangle control frame that would later be seen in NASA's and John Worth's hang gliders and ...

  4. Day shapes - Wikipedia

    en.wikipedia.org/wiki/Day_shapes

    Day shapes are black in color and their sizes are determined by the ColRegs; for example, the size of the ball is not less than 0.6 metres (2.0 ft). The vertical distance between shapes is at least 1.5 metres (4.9 ft). Vessels of less than 20 metres (66 ft) length may use shapes of smaller size commensurate with the size of the vessel. [2]

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  6. Rotating cone tactile device - Wikipedia

    en.wikipedia.org/wiki/Rotating_cone_tactile_device

    Cone on the right hand side of the underside of a pelican crossing control box. A rotating cone tactile device is a haptic device used at traffic light controlled pedestrian crossings in the United Kingdom. It is used as a tactile signal for blind pedestrians to indicate that it is safe to cross the road. [1]

  7. Timeline of United States inventions (1890–1945) - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_United_States...

    1914 Traffic coneTraffic cones, also called toddlers, road cones, safety cones, construction cones, pylons, or witches' hats, are usually cone-shaped markers that are placed on roads or sidewalks to temporarily redirect traffic in a safe manner. Traffic cones were invented in 1914 by Charles P. Rudabaker.

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