steam generator

noun

steam generator

noun

Rail transport, Railways, Transport A type of boiler fitted in a diesel locomotive or another rail vehicle, which provided steam heating in steam-heated passenger trains that had previously been hauled by steam locomotives.

[...] during those ghastly winters of the late 1940's when the smallish steam generators of early diesel passenger units proved inadequate …[...]1959, David P. Morgan, editor, Steam's Finest Hour, Kalmbach Publishing Co., page 8:

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