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Eccentric

A disc eccentrically secured onto an axle.


Eccentric Rod

A rod, connected to an eccentric sheaf or return crank at one end; and to a mechanism, free to oscillate, at the other end.


Eccentric Sheaf

A sleeve which is secured to, but free to rotate on, an eccentric.


Ejector

Most steam engines used for passenger and mainline work generally, had vacuum brakes. The vacuum was created by blowing steam through a series of cones. The larger cone (large ejector) was used to create the vacuum before the locomotive/train could move. A smaller ejector could be used to maintain the vacuum while running.


Electric Staff or Token

A token dispensing system consisting of a machine at each end of a single line section. A number of tokens are contained in each machine which are electrically locked in such a way that once a token is removed, another at either end cannot then be removed until the first one is replaced in one of the machines.


Electro-Diesel

A type of locomotive that can work as an electric locomotive where electrical supplies exist, but also has a diesel generator for use elsewhere. These locomotives are designed for electric operation for most of their work and utilise the diesel generator only in yards where there may be no supply or for short journeys. The diesel generator usually only produces a fraction of the power available where electric supplies are available.


Elevated Rail

The outer rail of a curve incorporating super-elevation.


Elevated Track

A railway route which runs through the streets of a city on a continuous viaduct.


Elliptical Roof

A coach or van roof which in cross section is in the shape of an ellipse.


EMU

Common acronym for Electric Multiple Unit.

End Loading

The practice of loading railway vehicles from the end rather than the side. This requires a vehicle to have end doors and for there to be facilities available to make such loading possible.


End-Loading Dock

A dock incorporating facilities for end loading.


Equalising Beam

A pivoted horizontal beam, with each end bearing on an axle, and the pivot bearing on the vehicle frame.


Equivalent Draw-Bar-Pull

The mathematical sum of the following three items: The actual draw-bar pull; the theoretical force needed to lift the weight of the locomotive and its tender (if any) up the gradient on which the train may be actually climbing; and the theoretical force needed to accelerate the locomotive and its tender at the rate at which the train might be actually accelerating. In other words, the theoretical draw-bar pull which would result if the weight of the locomotive and its tender were added to the train.


Escape Road

A loop adjacent to a platform track at a terminus station, which enables a locomotive to "escape" from the dead end of the terminus, in which it would otherwise be trapped by its coaches.


Expansion Joint

A special rail joint in which each rail is cut back and overlapped in such a way that considerable longitudinal movement between the two rails is possible.


Expansion Link

A link on the Stephenson, Allan, or Gooch valve gear, joining the two eccentric rods together, and in which the die block slides.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z