Abt system

noun

ˈäp(t)ˌs-,

ˈa-

: a system of tracking for mountain railroads in which two or more cograils are used and so arranged that the teeth are not opposite on any two of the rails

Word History

Etymology

after Roman Abt †1933 Swiss railroad engineer who devised it

First Known Use

1886, in the meaning defined above

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