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  2. Blue Comet - Wikipedia

    en.wikipedia.org/wiki/Blue_Comet

    The locomotives' marker lights, headlights, handrails, coupler lifting rods, cylinder head covers and back valve chambers were nickel-plated. Side rods were polished. The name of the train was painted in gold lettering on a blue nameboard that was mounted to the front of the locomotive smoke box just below the Elesco feedwater heater.

  3. 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.

  4. Day shapes - Wikipedia

    en.wikipedia.org/wiki/Day_shapes

    The appropriate lights may also be displayed during the day at times of restricted visibility or other necessary circumstances. [3] Vessels under 7 meters are generally not required to display day shapes even if they are required to display lights at night. [4] A square black flag displayed over the ball may be used as a distress signal. [5]

  5. 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]

  6. Discone antenna - Wikipedia

    en.wikipedia.org/wiki/Discone_antenna

    The cone: The length of the cone should be a quarter wavelength of the antenna's lowest operating frequency. [2] The cone angle is generally from 25 to 40 degrees. The insulator : The disc and cone must be separated by an insulator, the dimensions of which determine some of the antenna's properties, especially on near its high frequency limit.

  7. Lightning rod - Wikipedia

    en.wikipedia.org/wiki/Lightning_rod

    A lightning rod or lightning conductor (British English) is a metal rod mounted on a structure and intended to protect the structure from a lightning strike. If lightning hits the structure, it is most likely to strike the rod and be conducted to ground through a wire, rather than passing through the structure, where it could start a fire or ...