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  2. Air horn - Wikipedia

    en.wikipedia.org/wiki/Air_horn

    In trucks and buses, the air horn is powered with compressed air from the vehicle's air brake system. In trucks, a cord mounted on the ceiling of the operator's cab is pulled or in buses, a valve lever on the side of the dashboard is pushed down or pulled up to open the valve, supplying varying amounts of air to the horn.

  3. Leslie Controls - Wikipedia

    en.wikipedia.org/wiki/Leslie_Controls

    Leslie-Tyfon horns became the standard on most American railroads. [5] Leslie's horns were the most popular locomotive horns, and the standard for GM Electro-Motive Division models. Later, Leslie introduced the Type S Supertyfon, with three- and five-chime versions. The three-chime S3L was B, D#, A. Leslie sold more horns than competitor Nathan ...

  4. Velocity stack - Wikipedia

    en.wikipedia.org/wiki/Velocity_stack

    Short velocity stacks on a 302 cu.in. Ford FE engine in the tight confines of a Ford GT-40. A velocity stack, trumpet, or air horn [1] is a typically flared, parallel-sided tubular device fitted individually or in groupings to the entry of an engine's air intake system to smooth high speed airflow, and allow engine intake track tuning to incorporate pressure pulses created by its internal ...

  5. Westinghouse Air Brake Company - Wikipedia

    en.wikipedia.org/wiki/Westinghouse_Air_Brake_Company

    Westinghouse Air Brake Company's Rotair Valve [18] The first form of the air brake consisted of an air pump, a main reservoir (pressure vessel), and an engineer's valve on the locomotive, and of a train pipe and brake cylinder on each car. One problem with this first form of the air brake was that braking was applied to the first cars in a ...

  6. Nathan Manufacturing - Wikipedia

    en.wikipedia.org/wiki/Nathan_Manufacturing

    This horn is mainly used on Virginia Railway Express cab cars. Nathan also makes P-series and M-series horns for railroads and CS-Series and KJ-series horns, KSV vertical mount horns, steam whistles, heated horn assemblies, electronic pressure regulators, control valves, flange lubricators and glo rod gauges. [7] [clarification needed]

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  8. US Supreme Court hears case of trucker fired for failed drug ...

    www.aol.com/news/us-supreme-court-hears-case...

    The U.S. Supreme Court tackled a case on Tuesday involving a New York state man who was fired from his job as a commercial truck driver for failing a drug test after taking cannabidiol, or CBD ...

  9. Relay valve - Wikipedia

    en.wikipedia.org/wiki/Relay_valve

    A relay valve is an air-operated valve typically used in air brake systems to remotely control the brakes at the rear of a heavy truck or semi-trailer in a tractor-trailer combination. Relay valves are necessary in heavy trucks in order to speed-up rear-brake application and release, since air takes longer to travel to the rear of the vehicle ...

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