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The Nathan model M5 pictured is a 5 chime horn. A train horn is an air horn used as an audible warning device on diesel and electric-powered trains.
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.
The compressor forces air past a diaphragm in the horn's throat, causing it to vibrate. Usually two are used, with varied frequencies generally lower than those of automobile horns, in the 125–180 Hz (approximately C 3 –G 3) range. Sound levels are approximately 117–118 decibels.
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 ...
This is a list of auto parts, which are manufactured components of automobiles.This list reflects both fossil-fueled cars (using internal combustion engines) and electric vehicles; the list is not exhaustive.
As train loads, gradients and speeds increased, braking became a more significant problem. In the late 19th century, significantly better continuous brakes started to appear. The earliest type of continuous brake was the chain brake [19] which used a chain, running the length of the train, to operate brakes on all vehicles simultaneously.