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The P-series horns have longer bells and a heavier manifold than the M-series. [9] The name of the horn is a P followed by the bells that face forward, followed by R if any are reversed, and then the numbers of the reversed bells; a P12345 is a true five-chime horn with all bells facing forward, while P135R24 has bells 2 and 4 reversed. [2]
An air horn consists of a flaring metal or plastic horn or trumpet (called the "bell") attached to a small air chamber containing a metal reed or diaphragm in the throat of the horn. Compressed air flows from an inlet line through a narrow opening past the reed or diaphragm, causing it to vibrate, which creates sound waves .
Parts books were often issued as microfiche, though this has fallen out of favour. Now, many manufacturers offer this information digitally in an electronic parts catalogue. This can be locally installed software, or a centrally hosted web application. Usually, an electronic parts catalogue enables the user to virtually disassemble the product ...
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 ...
Diagram of a typical locomotive air horn power chamber, showing operation. Train horns are operated by compressed air, typically 125–140 psi (8.6–9.7 bar), and fed from a locomotive main air reservoir. When the engineer opens the horn valve, air flows through a supply line into the power chamber at the horn's base (diagram, right).
The list of horn makers spans all time, and not all still exist. Andreas Jungwirth [1] Atkinson Brass and Company [2] Briz Horn Company; Buescher Band Instrument Company; C.G. Conn; Christopher Cornford [3] Daniel Rauch; Dieter Otto [4] Ed. Kruspe; Engelbert Schmid [5] F. E. Olds; Finke [6] Gebr. Alexander; Hans Hoyer [7] Herbert Fritz Knopf [8 ...